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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 

Pull s390 updates from Martin Schwidefsky:

 - Add the CPU id for the new z13s machine

 - Add a s390 specific XOR template for RAID-5 checksumming based on the
   XC instruction.  Remove all other alternatives, XC is always faster

 - The merge of our four different stack tracers into a single one

 - Tidy up the code related to page tables, several large inline
   functions are now out-of-line.  Bloat-o-meter reports ~11K text size
   reduction

 - A binary interface for the priviledged CLP instruction to retrieve
   the hardware view of the installed PCI functions

 - Improvements for the dasd format code

 - Bug fixes and cleanups

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (31 commits)
  s390/pci: enforce fmb page boundary rule
  s390: fix floating pointer register corruption (again)
  s390/cpumf: add missing lpp magic initialization
  s390: Fix misspellings in comments
  s390/mm: split arch/s390/mm/pgtable.c
  s390/mm: uninline pmdp_xxx functions from pgtable.h
  s390/mm: uninline ptep_xxx functions from pgtable.h
  s390/pci: add ioctl interface for CLP
  s390: Use pr_warn instead of pr_warning
  s390/dasd: remove casts to dasd_*_private
  s390/dasd: Refactor dasd format functions
  s390/dasd: Simplify code in format logic
  s390/dasd: Improve dasd format code
  s390/percpu: remove this_cpu_cmpxchg_double_4
  s390/cpumf: Improve guest detection heuristics
  s390/fault: merge report_user_fault implementations
  s390/dis: use correct escape sequence for '%' character
  s390/kvm: simplify set_guest_storage_key
  s390/oprofile: add z13/z13s model numbers
  s390: add z13s model number to z13 elf platform
  ...
This commit is contained in:
Linus Torvalds 2016-03-16 10:47:45 -07:00
parent 1c8e85b17a 80c544ded2
commit 72aafdf01d
73 changed files with 2882 additions and 2714 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
arch/s390/Kconfig
View File

@ -254,12 +254,12 @@ config MARCH_ZEC12
older machines.
config MARCH_Z13
bool "IBM z13"
bool "IBM z13s and z13"
select HAVE_MARCH_Z13_FEATURES
help
Select this to enable optimizations for IBM z13 (2964 series).
The kernel will be slightly faster but will not work on older
machines.
Select this to enable optimizations for IBM z13s and z13 (2965 and
2964 series). The kernel will be slightly faster but will not work on
older machines.
endchoice

27
arch/s390/include/asm/clp.h
View File

@ -4,14 +4,23 @@
/* CLP common request & response block size */
#define CLP_BLK_SIZE PAGE_SIZE
#define CLP_LPS_BASE 0
#define CLP_LPS_PCI 2
struct clp_req_hdr {
u16 len;
u16 cmd;
u32 fmt : 4;
u32 reserved1 : 28;
u64 reserved2;
} __packed;
struct clp_rsp_hdr {
u16 len;
u16 rsp;
u32 fmt : 4;
u32 reserved1 : 28;
u64 reserved2;
} __packed;
/* CLP Response Codes */
@ -25,4 +34,22 @@ struct clp_rsp_hdr {
#define CLP_RC_NODATA 0x0080 /* No data available */
#define CLP_RC_FC_UNKNOWN 0x0100 /* Function code not recognized */
/* Store logical-processor characteristics request */
struct clp_req_slpc {
struct clp_req_hdr hdr;
} __packed;
struct clp_rsp_slpc {
struct clp_rsp_hdr hdr;
u32 reserved2[4];
u32 lpif[8];
u32 reserved3[8];
u32 lpic[8];
} __packed;
struct clp_req_rsp_slpc {
struct clp_req_slpc request;
struct clp_rsp_slpc response;
} __packed;
#endif

64
arch/s390/include/asm/gmap.h Normal file
View File

@ -0,0 +1,64 @@
/*
* KVM guest address space mapping code
*
* Copyright IBM Corp. 2007, 2016
* Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
*/
#ifndef _ASM_S390_GMAP_H
#define _ASM_S390_GMAP_H
/**
* struct gmap_struct - guest address space
* @crst_list: list of all crst tables used in the guest address space
* @mm: pointer to the parent mm_struct
* @guest_to_host: radix tree with guest to host address translation
* @host_to_guest: radix tree with pointer to segment table entries
* @guest_table_lock: spinlock to protect all entries in the guest page table
* @table: pointer to the page directory
* @asce: address space control element for gmap page table
* @pfault_enabled: defines if pfaults are applicable for the guest
*/
struct gmap {
struct list_head list;
struct list_head crst_list;
struct mm_struct *mm;
struct radix_tree_root guest_to_host;
struct radix_tree_root host_to_guest;
spinlock_t guest_table_lock;
unsigned long *table;
unsigned long asce;
unsigned long asce_end;
void *private;
bool pfault_enabled;
};
/**
* struct gmap_notifier - notify function block for page invalidation
* @notifier_call: address of callback function
*/
struct gmap_notifier {
struct list_head list;
void (*notifier_call)(struct gmap *gmap, unsigned long gaddr);
};
struct gmap *gmap_alloc(struct mm_struct *mm, unsigned long limit);
void gmap_free(struct gmap *gmap);
void gmap_enable(struct gmap *gmap);
void gmap_disable(struct gmap *gmap);
int gmap_map_segment(struct gmap *gmap, unsigned long from,
unsigned long to, unsigned long len);
int gmap_unmap_segment(struct gmap *gmap, unsigned long to, unsigned long len);
unsigned long __gmap_translate(struct gmap *, unsigned long gaddr);
unsigned long gmap_translate(struct gmap *, unsigned long gaddr);
int __gmap_link(struct gmap *gmap, unsigned long gaddr, unsigned long vmaddr);
int gmap_fault(struct gmap *, unsigned long gaddr, unsigned int fault_flags);
void gmap_discard(struct gmap *, unsigned long from, unsigned long to);
void __gmap_zap(struct gmap *, unsigned long gaddr);
void gmap_unlink(struct mm_struct *, unsigned long *table, unsigned long vmaddr);
void gmap_register_ipte_notifier(struct gmap_notifier *);
void gmap_unregister_ipte_notifier(struct gmap_notifier *);
int gmap_ipte_notify(struct gmap *, unsigned long start, unsigned long len);
#endif /* _ASM_S390_GMAP_H */

5
arch/s390/include/asm/pci.h
View File

@ -45,7 +45,7 @@ struct zpci_fmb {
u64 rpcit_ops;
u64 dma_rbytes;
u64 dma_wbytes;
} __packed __aligned(16);
} __packed __aligned(64);
enum zpci_state {
ZPCI_FN_STATE_RESERVED,
@ -66,7 +66,6 @@ struct s390_domain;
/* Private data per function */
struct zpci_dev {
struct pci_dev *pdev;
struct pci_bus *bus;
struct list_head entry; /* list of all zpci_devices, needed for hotplug, etc. */
@ -192,7 +191,7 @@ int zpci_fmb_disable_device(struct zpci_dev *);
/* Debug */
int zpci_debug_init(void);
void zpci_debug_exit(void);
void zpci_debug_init_device(struct zpci_dev *);
void zpci_debug_init_device(struct zpci_dev *, const char *);
void zpci_debug_exit_device(struct zpci_dev *);
void zpci_debug_info(struct zpci_dev *, struct seq_file *);

30
arch/s390/include/asm/pci_clp.h
View File

@ -49,9 +49,6 @@ struct clp_fh_list_entry {
/* List PCI functions request */
struct clp_req_list_pci {
struct clp_req_hdr hdr;
u32 fmt : 4; /* cmd request block format */
u32 : 28;
u64 reserved1;
u64 resume_token;
u64 reserved2;
} __packed;
@ -59,9 +56,6 @@ struct clp_req_list_pci {
/* List PCI functions response */
struct clp_rsp_list_pci {
struct clp_rsp_hdr hdr;
u32 fmt : 4; /* cmd request block format */
u32 : 28;
u64 reserved1;
u64 resume_token;
u32 reserved2;
u16 max_fn;
@ -73,9 +67,6 @@ struct clp_rsp_list_pci {
/* Query PCI function request */
struct clp_req_query_pci {
struct clp_req_hdr hdr;
u32 fmt : 4; /* cmd request block format */
u32 : 28;
u64 reserved1;
u32 fh; /* function handle */
u32 reserved2;
u64 reserved3;
@ -84,9 +75,6 @@ struct clp_req_query_pci {
/* Query PCI function response */
struct clp_rsp_query_pci {
struct clp_rsp_hdr hdr;
u32 fmt : 4; /* cmd request block format */
u32 : 28;
u64 : 64;
u16 vfn; /* virtual fn number */
u16 : 7;
u16 util_str_avail : 1; /* utility string available? */
@ -108,21 +96,15 @@ struct clp_rsp_query_pci {
/* Query PCI function group request */
struct clp_req_query_pci_grp {
struct clp_req_hdr hdr;
u32 fmt : 4; /* cmd request block format */
u32 : 28;
u64 reserved1;
u32 : 24;
u32 reserved2 : 24;
u32 pfgid : 8; /* function group id */
u32 reserved2;
u64 reserved3;
u32 reserved3;
u64 reserved4;
} __packed;
/* Query PCI function group response */
struct clp_rsp_query_pci_grp {
struct clp_rsp_hdr hdr;
u32 fmt : 4; /* cmd request block format */
u32 : 28;
u64 reserved1;
u16 : 4;
u16 noi : 12; /* number of interrupts */
u8 version;
@ -141,9 +123,6 @@ struct clp_rsp_query_pci_grp {
/* Set PCI function request */
struct clp_req_set_pci {
struct clp_req_hdr hdr;
u32 fmt : 4; /* cmd request block format */
u32 : 28;
u64 reserved1;
u32 fh; /* function handle */
u16 reserved2;
u8 oc; /* operation controls */
@ -154,9 +133,6 @@ struct clp_req_set_pci {
/* Set PCI function response */
struct clp_rsp_set_pci {
struct clp_rsp_hdr hdr;
u32 fmt : 4; /* cmd request block format */
u32 : 28;
u64 reserved1;
u32 fh; /* function handle */
u32 reserved3;
u64 reserved4;

1
arch/s390/include/asm/percpu.h
View File

@ -178,7 +178,6 @@
ret__; \
})
#define this_cpu_cmpxchg_double_4 arch_this_cpu_cmpxchg_double
#define this_cpu_cmpxchg_double_8 arch_this_cpu_cmpxchg_double
#include <asm-generic/percpu.h>

2
arch/s390/include/asm/perf_event.h
View File

@ -21,7 +21,7 @@
#define PMU_F_ERR_LSDA 0x0200
#define PMU_F_ERR_MASK (PMU_F_ERR_IBE|PMU_F_ERR_LSDA)
/* Perf defintions for PMU event attributes in sysfs */
/* Perf definitions for PMU event attributes in sysfs */
extern __init const struct attribute_group **cpumf_cf_event_group(void);
extern ssize_t cpumf_events_sysfs_show(struct device *dev,
struct device_attribute *attr,

4
arch/s390/include/asm/pgalloc.h
View File

@ -23,10 +23,6 @@ void page_table_free(struct mm_struct *, unsigned long *);
void page_table_free_rcu(struct mmu_gather *, unsigned long *, unsigned long);
extern int page_table_allocate_pgste;
int set_guest_storage_key(struct mm_struct *mm, unsigned long addr,
unsigned long key, bool nq);
unsigned long get_guest_storage_key(struct mm_struct *mm, unsigned long addr);
static inline void clear_table(unsigned long *s, unsigned long val, size_t n)
{
typedef struct { char _[n]; } addrtype;

652
arch/s390/include/asm/pgtable.h
View File

@ -298,15 +298,15 @@ static inline int is_module_addr(void *addr)
/*
* Segment table entry encoding (R = read-only, I = invalid, y = young bit):
* dy..R...I...wr
* dy..R...I...rw
* prot-none, clean, old 00..1...1...00
* prot-none, clean, young 01..1...1...00
* prot-none, dirty, old 10..1...1...00
* prot-none, dirty, young 11..1...1...00
* read-only, clean, old 00..1...1...01
* read-only, clean, young 01..1...0...01
* read-only, dirty, old 10..1...1...01
* read-only, dirty, young 11..1...0...01
* read-only, clean, old 00..1...1...10
* read-only, clean, young 01..1...0...10
* read-only, dirty, old 10..1...1...10
* read-only, dirty, young 11..1...0...10
* read-write, clean, old 00..1...1...11
* read-write, clean, young 01..1...0...11
* read-write, dirty, old 10..0...1...11
@ -520,15 +520,6 @@ static inline int pmd_bad(pmd_t pmd)
return (pmd_val(pmd) & ~_SEGMENT_ENTRY_BITS) != 0;
}
#define __HAVE_ARCH_PMDP_SET_ACCESS_FLAGS
extern int pmdp_set_access_flags(struct vm_area_struct *vma,
unsigned long address, pmd_t *pmdp,
pmd_t entry, int dirty);
#define __HAVE_ARCH_PMDP_CLEAR_YOUNG_FLUSH
extern int pmdp_clear_flush_young(struct vm_area_struct *vma,
unsigned long address, pmd_t *pmdp);
#define __HAVE_ARCH_PMD_WRITE
static inline int pmd_write(pmd_t pmd)
{
@ -631,208 +622,6 @@ static inline pmd_t pmd_clear_soft_dirty(pmd_t pmd)
return pmd;
}
static inline pgste_t pgste_get_lock(pte_t *ptep)
{
unsigned long new = 0;
#ifdef CONFIG_PGSTE
unsigned long old;
preempt_disable();
asm(
" lg %0,%2\n"
"0: lgr %1,%0\n"
" nihh %0,0xff7f\n" /* clear PCL bit in old */
" oihh %1,0x0080\n" /* set PCL bit in new */
" csg %0,%1,%2\n"
" jl 0b\n"
: "=&d" (old), "=&d" (new), "=Q" (ptep[PTRS_PER_PTE])
: "Q" (ptep[PTRS_PER_PTE]) : "cc", "memory");
#endif
return __pgste(new);
}
static inline void pgste_set_unlock(pte_t *ptep, pgste_t pgste)
{
#ifdef CONFIG_PGSTE
asm(
" nihh %1,0xff7f\n" /* clear PCL bit */
" stg %1,%0\n"
: "=Q" (ptep[PTRS_PER_PTE])
: "d" (pgste_val(pgste)), "Q" (ptep[PTRS_PER_PTE])
: "cc", "memory");
preempt_enable();
#endif
}
static inline pgste_t pgste_get(pte_t *ptep)
{
unsigned long pgste = 0;
#ifdef CONFIG_PGSTE
pgste = *(unsigned long *)(ptep + PTRS_PER_PTE);
#endif
return __pgste(pgste);
}
static inline void pgste_set(pte_t *ptep, pgste_t pgste)
{
#ifdef CONFIG_PGSTE
*(pgste_t *)(ptep + PTRS_PER_PTE) = pgste;
#endif
}
static inline pgste_t pgste_update_all(pte_t *ptep, pgste_t pgste,
struct mm_struct *mm)
{
#ifdef CONFIG_PGSTE
unsigned long address, bits, skey;
if (!mm_use_skey(mm) || pte_val(*ptep) & _PAGE_INVALID)
return pgste;
address = pte_val(*ptep) & PAGE_MASK;
skey = (unsigned long) page_get_storage_key(address);
bits = skey & (_PAGE_CHANGED | _PAGE_REFERENCED);
/* Transfer page changed & referenced bit to guest bits in pgste */
pgste_val(pgste) |= bits << 48; /* GR bit & GC bit */
/* Copy page access key and fetch protection bit to pgste */
pgste_val(pgste) &= ~(PGSTE_ACC_BITS | PGSTE_FP_BIT);
pgste_val(pgste) |= (skey & (_PAGE_ACC_BITS | _PAGE_FP_BIT)) << 56;
#endif
return pgste;
}
static inline void pgste_set_key(pte_t *ptep, pgste_t pgste, pte_t entry,
struct mm_struct *mm)
{
#ifdef CONFIG_PGSTE
unsigned long address;
unsigned long nkey;
if (!mm_use_skey(mm) || pte_val(entry) & _PAGE_INVALID)
return;
VM_BUG_ON(!(pte_val(*ptep) & _PAGE_INVALID));
address = pte_val(entry) & PAGE_MASK;
/*
* Set page access key and fetch protection bit from pgste.
* The guest C/R information is still in the PGSTE, set real
* key C/R to 0.
*/
nkey = (pgste_val(pgste) & (PGSTE_ACC_BITS | PGSTE_FP_BIT)) >> 56;
nkey |= (pgste_val(pgste) & (PGSTE_GR_BIT | PGSTE_GC_BIT)) >> 48;
page_set_storage_key(address, nkey, 0);
#endif
}
static inline pgste_t pgste_set_pte(pte_t *ptep, pgste_t pgste, pte_t entry)
{
if ((pte_val(entry) & _PAGE_PRESENT) &&
(pte_val(entry) & _PAGE_WRITE) &&
!(pte_val(entry) & _PAGE_INVALID)) {
if (!MACHINE_HAS_ESOP) {
/*
* Without enhanced suppression-on-protection force
* the dirty bit on for all writable ptes.
*/
pte_val(entry) |= _PAGE_DIRTY;
pte_val(entry) &= ~_PAGE_PROTECT;
}
if (!(pte_val(entry) & _PAGE_PROTECT))
/* This pte allows write access, set user-dirty */
pgste_val(pgste) |= PGSTE_UC_BIT;
}
*ptep = entry;
return pgste;
}
/**
* struct gmap_struct - guest address space
* @crst_list: list of all crst tables used in the guest address space
* @mm: pointer to the parent mm_struct
* @guest_to_host: radix tree with guest to host address translation
* @host_to_guest: radix tree with pointer to segment table entries
* @guest_table_lock: spinlock to protect all entries in the guest page table
* @table: pointer to the page directory
* @asce: address space control element for gmap page table
* @pfault_enabled: defines if pfaults are applicable for the guest
*/
struct gmap {
struct list_head list;
struct list_head crst_list;
struct mm_struct *mm;
struct radix_tree_root guest_to_host;
struct radix_tree_root host_to_guest;
spinlock_t guest_table_lock;
unsigned long *table;
unsigned long asce;
unsigned long asce_end;
void *private;
bool pfault_enabled;
};
/**
* struct gmap_notifier - notify function block for page invalidation
* @notifier_call: address of callback function
*/
struct gmap_notifier {
struct list_head list;
void (*notifier_call)(struct gmap *gmap, unsigned long gaddr);
};
struct gmap *gmap_alloc(struct mm_struct *mm, unsigned long limit);
void gmap_free(struct gmap *gmap);
void gmap_enable(struct gmap *gmap);
void gmap_disable(struct gmap *gmap);
int gmap_map_segment(struct gmap *gmap, unsigned long from,
unsigned long to, unsigned long len);
int gmap_unmap_segment(struct gmap *gmap, unsigned long to, unsigned long len);
unsigned long __gmap_translate(struct gmap *, unsigned long gaddr);
unsigned long gmap_translate(struct gmap *, unsigned long gaddr);
int __gmap_link(struct gmap *gmap, unsigned long gaddr, unsigned long vmaddr);
int gmap_fault(struct gmap *, unsigned long gaddr, unsigned int fault_flags);
void gmap_discard(struct gmap *, unsigned long from, unsigned long to);
void __gmap_zap(struct gmap *, unsigned long gaddr);
bool gmap_test_and_clear_dirty(unsigned long address, struct gmap *);
void gmap_register_ipte_notifier(struct gmap_notifier *);
void gmap_unregister_ipte_notifier(struct gmap_notifier *);
int gmap_ipte_notify(struct gmap *, unsigned long start, unsigned long len);
void gmap_do_ipte_notify(struct mm_struct *, unsigned long addr, pte_t *);
static inline pgste_t pgste_ipte_notify(struct mm_struct *mm,
unsigned long addr,
pte_t *ptep, pgste_t pgste)
{
#ifdef CONFIG_PGSTE
if (pgste_val(pgste) & PGSTE_IN_BIT) {
pgste_val(pgste) &= ~PGSTE_IN_BIT;
gmap_do_ipte_notify(mm, addr, ptep);
}
#endif
return pgste;
}
/*
* Certain architectures need to do special things when PTEs
* within a page table are directly modified. Thus, the following
* hook is made available.
*/
static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
pte_t *ptep, pte_t entry)
{
pgste_t pgste;
if (mm_has_pgste(mm)) {
pgste = pgste_get_lock(ptep);
pgste_val(pgste) &= ~_PGSTE_GPS_ZERO;
pgste_set_key(ptep, pgste, entry, mm);
pgste = pgste_set_pte(ptep, pgste, entry);
pgste_set_unlock(ptep, pgste);
} else {
*ptep = entry;
}
}
/*
* query functions pte_write/pte_dirty/pte_young only work if
* pte_present() is true. Undefined behaviour if not..
@ -998,105 +787,6 @@ static inline void __ptep_ipte_range(unsigned long address, int nr, pte_t *ptep)
} while (nr != 255);
}
static inline void ptep_flush_direct(struct mm_struct *mm,
unsigned long address, pte_t *ptep)
{
int active, count;
if (pte_val(*ptep) & _PAGE_INVALID)
return;
active = (mm == current->active_mm) ? 1 : 0;
count = atomic_add_return(0x10000, &mm->context.attach_count);
if (MACHINE_HAS_TLB_LC && (count & 0xffff) <= active &&
cpumask_equal(mm_cpumask(mm), cpumask_of(smp_processor_id())))
__ptep_ipte_local(address, ptep);
else
__ptep_ipte(address, ptep);
atomic_sub(0x10000, &mm->context.attach_count);
}
static inline void ptep_flush_lazy(struct mm_struct *mm,
unsigned long address, pte_t *ptep)
{
int active, count;
if (pte_val(*ptep) & _PAGE_INVALID)
return;
active = (mm == current->active_mm) ? 1 : 0;
count = atomic_add_return(0x10000, &mm->context.attach_count);
if ((count & 0xffff) <= active) {
pte_val(*ptep) |= _PAGE_INVALID;
mm->context.flush_mm = 1;
} else
__ptep_ipte(address, ptep);
atomic_sub(0x10000, &mm->context.attach_count);
}
/*
* Get (and clear) the user dirty bit for a pte.
*/
static inline int ptep_test_and_clear_user_dirty(struct mm_struct *mm,
unsigned long addr,
pte_t *ptep)
{
pgste_t pgste;
pte_t pte;
int dirty;
if (!mm_has_pgste(mm))
return 0;
pgste = pgste_get_lock(ptep);
dirty = !!(pgste_val(pgste) & PGSTE_UC_BIT);
pgste_val(pgste) &= ~PGSTE_UC_BIT;
pte = *ptep;
if (dirty && (pte_val(pte) & _PAGE_PRESENT)) {
pgste = pgste_ipte_notify(mm, addr, ptep, pgste);
__ptep_ipte(addr, ptep);
if (MACHINE_HAS_ESOP || !(pte_val(pte) & _PAGE_WRITE))
pte_val(pte) |= _PAGE_PROTECT;
else
pte_val(pte) |= _PAGE_INVALID;
*ptep = pte;
}
pgste_set_unlock(ptep, pgste);
return dirty;
}
#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
static inline int ptep_test_and_clear_young(struct vm_area_struct *vma,
unsigned long addr, pte_t *ptep)
{
pgste_t pgste;
pte_t pte, oldpte;
int young;
if (mm_has_pgste(vma->vm_mm)) {
pgste = pgste_get_lock(ptep);
pgste = pgste_ipte_notify(vma->vm_mm, addr, ptep, pgste);
}
oldpte = pte = *ptep;
ptep_flush_direct(vma->vm_mm, addr, ptep);
young = pte_young(pte);
pte = pte_mkold(pte);
if (mm_has_pgste(vma->vm_mm)) {
pgste = pgste_update_all(&oldpte, pgste, vma->vm_mm);
pgste = pgste_set_pte(ptep, pgste, pte);
pgste_set_unlock(ptep, pgste);
} else
*ptep = pte;
return young;
}
#define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH
static inline int ptep_clear_flush_young(struct vm_area_struct *vma,
unsigned long address, pte_t *ptep)
{
return ptep_test_and_clear_young(vma, address, ptep);
}
/*
* This is hard to understand. ptep_get_and_clear and ptep_clear_flush
* both clear the TLB for the unmapped pte. The reason is that
@ -1110,91 +800,42 @@ static inline int ptep_clear_flush_young(struct vm_area_struct *vma,
* have ptep_get_and_clear do the tlb flush. In exchange flush_tlb_range
* is a nop.
*/
pte_t ptep_xchg_direct(struct mm_struct *, unsigned long, pte_t *, pte_t);
pte_t ptep_xchg_lazy(struct mm_struct *, unsigned long, pte_t *, pte_t);
#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
static inline int ptep_test_and_clear_young(struct vm_area_struct *vma,
unsigned long addr, pte_t *ptep)
{
pte_t pte = *ptep;
pte = ptep_xchg_direct(vma->vm_mm, addr, ptep, pte_mkold(pte));
return pte_young(pte);
}
#define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH
static inline int ptep_clear_flush_young(struct vm_area_struct *vma,
unsigned long address, pte_t *ptep)
{
return ptep_test_and_clear_young(vma, address, ptep);
}
#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
static inline pte_t ptep_get_and_clear(struct mm_struct *mm,
unsigned long address, pte_t *ptep)
unsigned long addr, pte_t *ptep)
{
pgste_t pgste;
pte_t pte;
if (mm_has_pgste(mm)) {
pgste = pgste_get_lock(ptep);
pgste = pgste_ipte_notify(mm, address, ptep, pgste);
}
pte = *ptep;
ptep_flush_lazy(mm, address, ptep);
pte_val(*ptep) = _PAGE_INVALID;
if (mm_has_pgste(mm)) {
pgste = pgste_update_all(&pte, pgste, mm);
pgste_set_unlock(ptep, pgste);
}
return pte;
return ptep_xchg_lazy(mm, addr, ptep, __pte(_PAGE_INVALID));
}
#define __HAVE_ARCH_PTEP_MODIFY_PROT_TRANSACTION
static inline pte_t ptep_modify_prot_start(struct mm_struct *mm,
unsigned long address,
pte_t *ptep)
{
pgste_t pgste;
pte_t pte;
if (mm_has_pgste(mm)) {
pgste = pgste_get_lock(ptep);
pgste_ipte_notify(mm, address, ptep, pgste);
}
pte = *ptep;
ptep_flush_lazy(mm, address, ptep);
if (mm_has_pgste(mm)) {
pgste = pgste_update_all(&pte, pgste, mm);
pgste_set(ptep, pgste);
}
return pte;
}
static inline void ptep_modify_prot_commit(struct mm_struct *mm,
unsigned long address,
pte_t *ptep, pte_t pte)
{
pgste_t pgste;
if (mm_has_pgste(mm)) {
pgste = pgste_get(ptep);
pgste_set_key(ptep, pgste, pte, mm);
pgste = pgste_set_pte(ptep, pgste, pte);
pgste_set_unlock(ptep, pgste);
} else
*ptep = pte;
}
pte_t ptep_modify_prot_start(struct mm_struct *, unsigned long, pte_t *);
void ptep_modify_prot_commit(struct mm_struct *, unsigned long, pte_t *, pte_t);
#define __HAVE_ARCH_PTEP_CLEAR_FLUSH
static inline pte_t ptep_clear_flush(struct vm_area_struct *vma,
unsigned long address, pte_t *ptep)
unsigned long addr, pte_t *ptep)
{
pgste_t pgste;
pte_t pte;
if (mm_has_pgste(vma->vm_mm)) {
pgste = pgste_get_lock(ptep);
pgste = pgste_ipte_notify(vma->vm_mm, address, ptep, pgste);
}
pte = *ptep;
ptep_flush_direct(vma->vm_mm, address, ptep);
pte_val(*ptep) = _PAGE_INVALID;
if (mm_has_pgste(vma->vm_mm)) {
if ((pgste_val(pgste) & _PGSTE_GPS_USAGE_MASK) ==
_PGSTE_GPS_USAGE_UNUSED)
pte_val(pte) |= _PAGE_UNUSED;
pgste = pgste_update_all(&pte, pgste, vma->vm_mm);
pgste_set_unlock(ptep, pgste);
}
return pte;
return ptep_xchg_direct(vma->vm_mm, addr, ptep, __pte(_PAGE_INVALID));
}
/*
@ -1206,82 +847,68 @@ static inline pte_t ptep_clear_flush(struct vm_area_struct *vma,
*/
#define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL
static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm,
unsigned long address,
unsigned long addr,
pte_t *ptep, int full)
{
pgste_t pgste;
pte_t pte;
if (!full && mm_has_pgste(mm)) {
pgste = pgste_get_lock(ptep);
pgste = pgste_ipte_notify(mm, address, ptep, pgste);
if (full) {
pte_t pte = *ptep;
*ptep = __pte(_PAGE_INVALID);
return pte;
}
pte = *ptep;
if (!full)
ptep_flush_lazy(mm, address, ptep);
pte_val(*ptep) = _PAGE_INVALID;
if (!full && mm_has_pgste(mm)) {
pgste = pgste_update_all(&pte, pgste, mm);
pgste_set_unlock(ptep, pgste);
}
return pte;
return ptep_xchg_lazy(mm, addr, ptep, __pte(_PAGE_INVALID));
}
#define __HAVE_ARCH_PTEP_SET_WRPROTECT
static inline pte_t ptep_set_wrprotect(struct mm_struct *mm,
unsigned long address, pte_t *ptep)
static inline void ptep_set_wrprotect(struct mm_struct *mm,
unsigned long addr, pte_t *ptep)
{
pgste_t pgste;
pte_t pte = *ptep;
if (pte_write(pte)) {
if (mm_has_pgste(mm)) {
pgste = pgste_get_lock(ptep);
pgste = pgste_ipte_notify(mm, address, ptep, pgste);
}
ptep_flush_lazy(mm, address, ptep);
pte = pte_wrprotect(pte);
if (mm_has_pgste(mm)) {
pgste = pgste_set_pte(ptep, pgste, pte);
pgste_set_unlock(ptep, pgste);
} else
*ptep = pte;
}
return pte;
if (pte_write(pte))
ptep_xchg_lazy(mm, addr, ptep, pte_wrprotect(pte));
}
#define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
static inline int ptep_set_access_flags(struct vm_area_struct *vma,
unsigned long address, pte_t *ptep,
unsigned long addr, pte_t *ptep,
pte_t entry, int dirty)
{
pgste_t pgste;
pte_t oldpte;
oldpte = *ptep;
if (pte_same(oldpte, entry))
if (pte_same(*ptep, entry))
return 0;
if (mm_has_pgste(vma->vm_mm)) {
pgste = pgste_get_lock(ptep);
pgste = pgste_ipte_notify(vma->vm_mm, address, ptep, pgste);
}
ptep_flush_direct(vma->vm_mm, address, ptep);
if (mm_has_pgste(vma->vm_mm)) {
if (pte_val(oldpte) & _PAGE_INVALID)
pgste_set_key(ptep, pgste, entry, vma->vm_mm);
pgste = pgste_set_pte(ptep, pgste, entry);
pgste_set_unlock(ptep, pgste);
} else
*ptep = entry;
ptep_xchg_direct(vma->vm_mm, addr, ptep, entry);
return 1;
}
/*
* Additional functions to handle KVM guest page tables
*/
void ptep_set_pte_at(struct mm_struct *mm, unsigned long addr,
pte_t *ptep, pte_t entry);
void ptep_set_notify(struct mm_struct *mm, unsigned long addr, pte_t *ptep);
void ptep_notify(struct mm_struct *mm, unsigned long addr, pte_t *ptep);
void ptep_zap_unused(struct mm_struct *mm, unsigned long addr,
pte_t *ptep , int reset);
void ptep_zap_key(struct mm_struct *mm, unsigned long addr, pte_t *ptep);
bool test_and_clear_guest_dirty(struct mm_struct *mm, unsigned long address);
int set_guest_storage_key(struct mm_struct *mm, unsigned long addr,
unsigned char key, bool nq);
unsigned char get_guest_storage_key(struct mm_struct *mm, unsigned long addr);
/*
* Certain architectures need to do special things when PTEs
* within a page table are directly modified. Thus, the following
* hook is made available.
*/
static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
pte_t *ptep, pte_t entry)
{
if (mm_has_pgste(mm))
ptep_set_pte_at(mm, addr, ptep, entry);
else
*ptep = entry;
}
/*
* Conversion functions: convert a page and protection to a page entry,
* and a page entry and page directory to the page they refer to.
@ -1476,54 +1103,51 @@ static inline void __pmdp_idte_local(unsigned long address, pmd_t *pmdp)
: "cc" );
}
static inline void pmdp_flush_direct(struct mm_struct *mm,
unsigned long address, pmd_t *pmdp)
{
int active, count;
if (pmd_val(*pmdp) & _SEGMENT_ENTRY_INVALID)
return;
if (!MACHINE_HAS_IDTE) {
__pmdp_csp(pmdp);
return;
}
active = (mm == current->active_mm) ? 1 : 0;
count = atomic_add_return(0x10000, &mm->context.attach_count);
if (MACHINE_HAS_TLB_LC && (count & 0xffff) <= active &&
cpumask_equal(mm_cpumask(mm), cpumask_of(smp_processor_id())))
__pmdp_idte_local(address, pmdp);
else
__pmdp_idte(address, pmdp);
atomic_sub(0x10000, &mm->context.attach_count);
}
static inline void pmdp_flush_lazy(struct mm_struct *mm,
unsigned long address, pmd_t *pmdp)
{
int active, count;
if (pmd_val(*pmdp) & _SEGMENT_ENTRY_INVALID)
return;
active = (mm == current->active_mm) ? 1 : 0;
count = atomic_add_return(0x10000, &mm->context.attach_count);
if ((count & 0xffff) <= active) {
pmd_val(*pmdp) |= _SEGMENT_ENTRY_INVALID;
mm->context.flush_mm = 1;
} else if (MACHINE_HAS_IDTE)
__pmdp_idte(address, pmdp);
else
__pmdp_csp(pmdp);
atomic_sub(0x10000, &mm->context.attach_count);
}
pmd_t pmdp_xchg_direct(struct mm_struct *, unsigned long, pmd_t *, pmd_t);
pmd_t pmdp_xchg_lazy(struct mm_struct *, unsigned long, pmd_t *, pmd_t);
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
#define __HAVE_ARCH_PGTABLE_DEPOSIT
extern void pgtable_trans_huge_deposit(struct mm_struct *mm, pmd_t *pmdp,
pgtable_t pgtable);
void pgtable_trans_huge_deposit(struct mm_struct *mm, pmd_t *pmdp,
pgtable_t pgtable);
#define __HAVE_ARCH_PGTABLE_WITHDRAW
extern pgtable_t pgtable_trans_huge_withdraw(struct mm_struct *mm, pmd_t *pmdp);
pgtable_t pgtable_trans_huge_withdraw(struct mm_struct *mm, pmd_t *pmdp);
#define __HAVE_ARCH_PMDP_SET_ACCESS_FLAGS
static inline int pmdp_set_access_flags(struct vm_area_struct *vma,
unsigned long addr, pmd_t *pmdp,
pmd_t entry, int dirty)
{
VM_BUG_ON(addr & ~HPAGE_MASK);
entry = pmd_mkyoung(entry);
if (dirty)
entry = pmd_mkdirty(entry);
if (pmd_val(*pmdp) == pmd_val(entry))
return 0;
pmdp_xchg_direct(vma->vm_mm, addr, pmdp, entry);
return 1;
}
#define __HAVE_ARCH_PMDP_TEST_AND_CLEAR_YOUNG
static inline int pmdp_test_and_clear_young(struct vm_area_struct *vma,
unsigned long addr, pmd_t *pmdp)
{
pmd_t pmd = *pmdp;
pmd = pmdp_xchg_direct(vma->vm_mm, addr, pmdp, pmd_mkold(pmd));
return pmd_young(pmd);
}
#define __HAVE_ARCH_PMDP_CLEAR_YOUNG_FLUSH
static inline int pmdp_clear_flush_young(struct vm_area_struct *vma,
unsigned long addr, pmd_t *pmdp)
{
VM_BUG_ON(addr & ~HPAGE_MASK);
return pmdp_test_and_clear_young(vma, addr, pmdp);
}
static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr,
pmd_t *pmdp, pmd_t entry)
@ -1539,66 +1163,48 @@ static inline pmd_t pmd_mkhuge(pmd_t pmd)
return pmd;
}
#define __HAVE_ARCH_PMDP_TEST_AND_CLEAR_YOUNG
static inline int pmdp_test_and_clear_young(struct vm_area_struct *vma,
unsigned long address, pmd_t *pmdp)
{
pmd_t pmd;
pmd = *pmdp;
pmdp_flush_direct(vma->vm_mm, address, pmdp);
*pmdp = pmd_mkold(pmd);
return pmd_young(pmd);
}
#define __HAVE_ARCH_PMDP_HUGE_GET_AND_CLEAR
static inline pmd_t pmdp_huge_get_and_clear(struct mm_struct *mm,
unsigned long address, pmd_t *pmdp)
unsigned long addr, pmd_t *pmdp)
{
pmd_t pmd = *pmdp;
pmdp_flush_direct(mm, address, pmdp);
pmd_clear(pmdp);
return pmd;
return pmdp_xchg_direct(mm, addr, pmdp, __pmd(_SEGMENT_ENTRY_INVALID));
}
#define __HAVE_ARCH_PMDP_HUGE_GET_AND_CLEAR_FULL
static inline pmd_t pmdp_huge_get_and_clear_full(struct mm_struct *mm,
unsigned long address,
unsigned long addr,
pmd_t *pmdp, int full)
{
pmd_t pmd = *pmdp;
if (!full)
pmdp_flush_lazy(mm, address, pmdp);
pmd_clear(pmdp);
return pmd;
if (full) {
pmd_t pmd = *pmdp;
*pmdp = __pmd(_SEGMENT_ENTRY_INVALID);
return pmd;
}
return pmdp_xchg_lazy(mm, addr, pmdp, __pmd(_SEGMENT_ENTRY_INVALID));
}
#define __HAVE_ARCH_PMDP_HUGE_CLEAR_FLUSH
static inline pmd_t pmdp_huge_clear_flush(struct vm_area_struct *vma,
unsigned long address, pmd_t *pmdp)
unsigned long addr, pmd_t *pmdp)
{
return pmdp_huge_get_and_clear(vma->vm_mm, address, pmdp);
return pmdp_huge_get_and_clear(vma->vm_mm, addr, pmdp);
}
#define __HAVE_ARCH_PMDP_INVALIDATE
static inline void pmdp_invalidate(struct vm_area_struct *vma,
unsigned long address, pmd_t *pmdp)
unsigned long addr, pmd_t *pmdp)
{
pmdp_flush_direct(vma->vm_mm, address, pmdp);
pmdp_xchg_direct(vma->vm_mm, addr, pmdp, __pmd(_SEGMENT_ENTRY_INVALID));
}
#define __HAVE_ARCH_PMDP_SET_WRPROTECT
static inline void pmdp_set_wrprotect(struct mm_struct *mm,
unsigned long address, pmd_t *pmdp)
unsigned long addr, pmd_t *pmdp)
{
pmd_t pmd = *pmdp;
if (pmd_write(pmd)) {
pmdp_flush_direct(mm, address, pmdp);
set_pmd_at(mm, address, pmdp, pmd_wrprotect(pmd));
}
if (pmd_write(pmd))
pmd = pmdp_xchg_lazy(mm, addr, pmdp, pmd_wrprotect(pmd));
}
static inline pmd_t pmdp_collapse_flush(struct vm_area_struct *vma,

12
arch/s390/include/asm/processor.h
View File

@ -184,6 +184,10 @@ struct task_struct;
struct mm_struct;
struct seq_file;
typedef int (*dump_trace_func_t)(void *data, unsigned long address);
void dump_trace(dump_trace_func_t func, void *data,
struct task_struct *task, unsigned long sp);
void show_cacheinfo(struct seq_file *m);
/* Free all resources held by a thread. */
@ -203,6 +207,14 @@ unsigned long get_wchan(struct task_struct *p);
/* Has task runtime instrumentation enabled ? */
#define is_ri_task(tsk) (!!(tsk)->thread.ri_cb)
static inline unsigned long current_stack_pointer(void)
{
unsigned long sp;
asm volatile("la %0,0(15)" : "=a" (sp));
return sp;
}
static inline unsigned short stap(void)
{
unsigned short cpu_address;

2
arch/s390/include/asm/rwsem.h
View File

@ -31,7 +31,7 @@
* This should be totally fair - if anything is waiting, a process that wants a
* lock will go to the back of the queue. When the currently active lock is
* released, if there's a writer at the front of the queue, then that and only
* that will be woken up; if there's a bunch of consequtive readers at the
* that will be woken up; if there's a bunch of consecutive readers at the
* front, then they'll all be woken up, but no other readers will be.
*/

2
arch/s390/include/asm/setup.h
View File

@ -101,6 +101,8 @@ extern void pfault_fini(void);
#define pfault_fini() do { } while (0)
#endif /* CONFIG_PFAULT */
void report_user_fault(struct pt_regs *regs, long signr, int is_mm_fault);
extern void cmma_init(void);
extern void (*_machine_restart)(char *command);

21
arch/s390/include/asm/xor.h
View File

@ -1 +1,20 @@
#include <asm-generic/xor.h>
/*
* Optimited xor routines
*
* Copyright IBM Corp. 2016
* Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
*/
#ifndef _ASM_S390_XOR_H
#define _ASM_S390_XOR_H
extern struct xor_block_template xor_block_xc;
#undef XOR_TRY_TEMPLATES
#define XOR_TRY_TEMPLATES \
do { \
xor_speed(&xor_block_xc); \
} while (0)
#define XOR_SELECT_TEMPLATE(FASTEST) (&xor_block_xc)
#endif /* _ASM_S390_XOR_H */

28
arch/s390/include/uapi/asm/clp.h Normal file
View File

@ -0,0 +1,28 @@
/*
* ioctl interface for /dev/clp
*
* Copyright IBM Corp. 2016
* Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
*/
#ifndef _ASM_CLP_H
#define _ASM_CLP_H
#include <linux/types.h>
#include <linux/ioctl.h>
struct clp_req {
unsigned int c : 1;
unsigned int r : 1;
unsigned int lps : 6;
unsigned int cmd : 8;
unsigned int : 16;
unsigned int reserved;
__u64 data_p;
};
#define CLP_IOCTL_MAGIC 'c'
#define CLP_SYNC _IOWR(CLP_IOCTL_MAGIC, 0xC1, struct clp_req)
#endif

1
arch/s390/kernel/asm-offsets.c
View File

@ -12,6 +12,7 @@
#include <asm/idle.h>
#include <asm/vdso.h>
#include <asm/pgtable.h>
#include <asm/gmap.h>
/*
* Make sure that the compiler is new enough. We want a compiler that

3
arch/s390/kernel/cpcmd.c
View File

@ -96,8 +96,7 @@ int cpcmd(const char *cmd, char *response, int rlen, int *response_code)
(((unsigned long)response + rlen) >> 31)) {
lowbuf = kmalloc(rlen, GFP_KERNEL | GFP_DMA);
if (!lowbuf) {
pr_warning("The cpcmd kernel function failed to "
"allocate a response buffer\n");
pr_warn("The cpcmd kernel function failed to allocate a response buffer\n");
return -ENOMEM;
}
spin_lock_irqsave(&cpcmd_lock, flags);

6
arch/s390/kernel/debug.c
View File

@ -699,8 +699,7 @@ debug_info_t *debug_register_mode(const char *name, int pages_per_area,
/* Since debugfs currently does not support uid/gid other than root, */
/* we do not allow gid/uid != 0 until we get support for that. */
if ((uid != 0) || (gid != 0))
pr_warning("Root becomes the owner of all s390dbf files "
"in sysfs\n");
pr_warn("Root becomes the owner of all s390dbf files in sysfs\n");
BUG_ON(!initialized);
mutex_lock(&debug_mutex);
@ -1307,8 +1306,7 @@ debug_input_level_fn(debug_info_t * id, struct debug_view *view,
new_level = debug_get_uint(str);
}
if(new_level < 0) {
pr_warning("%s is not a valid level for a debug "
"feature\n", str);
pr_warn("%s is not a valid level for a debug feature\n", str);
rc = -EINVAL;
} else {
debug_set_level(id, new_level);

17
arch/s390/kernel/dis.c
View File

@ -1920,23 +1920,16 @@ static int print_insn(char *buffer, unsigned char *code, unsigned long addr)
}
if (separator)
ptr += sprintf(ptr, "%c", separator);
/*
* Use four '%' characters below because of the
* following two conversions:
*
* 1) sprintf: %%%%r -> %%r
* 2) printk : %%r -> %r
*/
if (operand->flags & OPERAND_GPR)
ptr += sprintf(ptr, "%%%%r%i", value);
ptr += sprintf(ptr, "%%r%i", value);
else if (operand->flags & OPERAND_FPR)
ptr += sprintf(ptr, "%%%%f%i", value);
ptr += sprintf(ptr, "%%f%i", value);
else if (operand->flags & OPERAND_AR)
ptr += sprintf(ptr, "%%%%a%i", value);
ptr += sprintf(ptr, "%%a%i", value);
else if (operand->flags & OPERAND_CR)
ptr += sprintf(ptr, "%%%%c%i", value);
ptr += sprintf(ptr, "%%c%i", value);
else if (operand->flags & OPERAND_VR)
ptr += sprintf(ptr, "%%%%v%i", value);
ptr += sprintf(ptr, "%%v%i", value);
else if (operand->flags & OPERAND_PCREL)
ptr += sprintf(ptr, "%lx", (signed int) value
+ addr);

93
arch/s390/kernel/dumpstack.c
View File

@ -19,28 +19,28 @@
#include <asm/ipl.h>
/*
* For show_trace we have tree different stack to consider:
* For dump_trace we have tree different stack to consider:
* - the panic stack which is used if the kernel stack has overflown
* - the asynchronous interrupt stack (cpu related)
* - the synchronous kernel stack (process related)
* The stack trace can start at any of the three stack and can potentially
* The stack trace can start at any of the three stacks and can potentially
* touch all of them. The order is: panic stack, async stack, sync stack.
*/
static unsigned long
__show_trace(unsigned long sp, unsigned long low, unsigned long high)
__dump_trace(dump_trace_func_t func, void *data, unsigned long sp,
unsigned long low, unsigned long high)
{
struct stack_frame *sf;
struct pt_regs *regs;
unsigned long addr;
while (1) {
if (sp < low || sp > high - sizeof(*sf))
return sp;
sf = (struct stack_frame *) sp;
addr = sf->gprs[8];
printk("([<%016lx>] %pSR)\n", addr, (void *)addr);
/* Follow the backchain. */
while (1) {
if (func(data, sf->gprs[8]))
return sp;
low = sp;
sp = sf->back_chain;
if (!sp)
@ -48,46 +48,58 @@ __show_trace(unsigned long sp, unsigned long low, unsigned long high)
if (sp <= low || sp > high - sizeof(*sf))
return sp;
sf = (struct stack_frame *) sp;
addr = sf->gprs[8];
printk(" [<%016lx>] %pSR\n", addr, (void *)addr);
}
/* Zero backchain detected, check for interrupt frame. */
sp = (unsigned long) (sf + 1);
if (sp <= low || sp > high - sizeof(*regs))
return sp;
regs = (struct pt_regs *) sp;
addr = regs->psw.addr;
printk(" [<%016lx>] %pSR\n", addr, (void *)addr);
if (!user_mode(regs)) {
if (func(data, regs->psw.addr))
return sp;
}
low = sp;
sp = regs->gprs[15];
}
}
static void show_trace(struct task_struct *task, unsigned long *stack)
void dump_trace(dump_trace_func_t func, void *data, struct task_struct *task,
unsigned long sp)
{
const unsigned long frame_size =
STACK_FRAME_OVERHEAD + sizeof(struct pt_regs);
register unsigned long __r15 asm ("15");
unsigned long sp;
unsigned long frame_size;
sp = (unsigned long) stack;
if (!sp)
sp = task ? task->thread.ksp : __r15;
printk("Call Trace:\n");
frame_size = STACK_FRAME_OVERHEAD + sizeof(struct pt_regs);
#ifdef CONFIG_CHECK_STACK
sp = __show_trace(sp,
sp = __dump_trace(func, data, sp,
S390_lowcore.panic_stack + frame_size - 4096,
S390_lowcore.panic_stack + frame_size);
#endif
sp = __show_trace(sp,
sp = __dump_trace(func, data, sp,
S390_lowcore.async_stack + frame_size - ASYNC_SIZE,
S390_lowcore.async_stack + frame_size);
if (task)
__show_trace(sp, (unsigned long) task_stack_page(task),
(unsigned long) task_stack_page(task) + THREAD_SIZE);
__dump_trace(func, data, sp,
(unsigned long)task_stack_page(task),
(unsigned long)task_stack_page(task) + THREAD_SIZE);
else
__show_trace(sp, S390_lowcore.thread_info,
__dump_trace(func, data, sp,
S390_lowcore.thread_info,
S390_lowcore.thread_info + THREAD_SIZE);
}
EXPORT_SYMBOL_GPL(dump_trace);
static int show_address(void *data, unsigned long address)
{
printk("([<%016lx>] %pSR)\n", address, (void *)address);
return 0;
}
static void show_trace(struct task_struct *task, unsigned long sp)
{
if (!sp)
sp = task ? task->thread.ksp : current_stack_pointer();
printk("Call Trace:\n");
dump_trace(show_address, NULL, task, sp);
if (!task)
task = current;
debug_show_held_locks(task);
@ -95,15 +107,16 @@ static void show_trace(struct task_struct *task, unsigned long *stack)
void show_stack(struct task_struct *task, unsigned long *sp)
{
register unsigned long *__r15 asm ("15");
unsigned long *stack;
int i;
if (!sp)
stack = task ? (unsigned long *) task->thread.ksp : __r15;
else
stack = sp;
stack = sp;
if (!stack) {
if (!task)
stack = (unsigned long *)current_stack_pointer();
else
stack = (unsigned long *)task->thread.ksp;
}
for (i = 0; i < 20; i++) {
if (((addr_t) stack & (THREAD_SIZE-1)) == 0)
break;
@ -112,7 +125,7 @@ void show_stack(struct task_struct *task, unsigned long *sp)
printk("%016lx ", *stack++);
}
printk("\n");
show_trace(task, sp);
show_trace(task, (unsigned long)sp);
}
static void show_last_breaking_event(struct pt_regs *regs)
@ -121,13 +134,9 @@ static void show_last_breaking_event(struct pt_regs *regs)
printk(" [<%016lx>] %pSR\n", regs->args[0], (void *)regs->args[0]);
}
static inline int mask_bits(struct pt_regs *regs, unsigned long bits)
{
return (regs->psw.mask & bits) / ((~bits + 1) & bits);
}
void show_registers(struct pt_regs *regs)
{
struct psw_bits *psw = &psw_bits(regs->psw);
char *mode;
mode = user_mode(regs) ? "User" : "Krnl";
@ -136,13 +145,9 @@ void show_registers(struct pt_regs *regs)
printk(" (%pSR)", (void *)regs->psw.addr);
printk("\n");
printk(" R:%x T:%x IO:%x EX:%x Key:%x M:%x W:%x "
"P:%x AS:%x CC:%x PM:%x", mask_bits(regs, PSW_MASK_PER),
mask_bits(regs, PSW_MASK_DAT), mask_bits(regs, PSW_MASK_IO),
mask_bits(regs, PSW_MASK_EXT), mask_bits(regs, PSW_MASK_KEY),
mask_bits(regs, PSW_MASK_MCHECK), mask_bits(regs, PSW_MASK_WAIT),
mask_bits(regs, PSW_MASK_PSTATE), mask_bits(regs, PSW_MASK_ASC),
mask_bits(regs, PSW_MASK_CC), mask_bits(regs, PSW_MASK_PM));
printk(" EA:%x", mask_bits(regs, PSW_MASK_EA | PSW_MASK_BA));
"P:%x AS:%x CC:%x PM:%x", psw->r, psw->t, psw->i, psw->e,
psw->key, psw->m, psw->w, psw->p, psw->as, psw->cc, psw->pm);
printk(" RI:%x EA:%x", psw->ri, psw->eaba);
printk("\n%s GPRS: %016lx %016lx %016lx %016lx\n", mode,
regs->gprs[0], regs->gprs[1], regs->gprs[2], regs->gprs[3]);
printk(" %016lx %016lx %016lx %016lx\n",
@ -160,7 +165,7 @@ void show_regs(struct pt_regs *regs)
show_registers(regs);
/* Show stack backtrace if pt_regs is from kernel mode */
if (!user_mode(regs))
show_trace(NULL, (unsigned long *) regs->gprs[15]);
show_trace(NULL, regs->gprs[15]);
show_last_breaking_event(regs);
}

107
arch/s390/kernel/entry.S
View File

@ -186,6 +186,7 @@ ENTRY(__switch_to)
stg %r5,__LC_THREAD_INFO # store thread info of next
stg %r15,__LC_KERNEL_STACK # store end of kernel stack
lg %r15,__THREAD_ksp(%r1) # load kernel stack of next
/* c4 is used in guest detection: arch/s390/kernel/perf_cpum_sf.c */
lctl %c4,%c4,__TASK_pid(%r3) # load pid to control reg. 4
mvc __LC_CURRENT_PID(4,%r0),__TASK_pid(%r3) # store pid of next
lmg %r6,%r15,__SF_GPRS(%r15) # load gprs of next task
@ -1199,114 +1200,12 @@ cleanup_critical:
.quad .Lpsw_idle_lpsw
.Lcleanup_save_fpu_regs:
TSTMSK __LC_CPU_FLAGS,_CIF_FPU
bor %r14
clg %r9,BASED(.Lcleanup_save_fpu_regs_done)
jhe 5f
clg %r9,BASED(.Lcleanup_save_fpu_regs_fp)
jhe 4f
clg %r9,BASED(.Lcleanup_save_fpu_regs_vx_high)
jhe 3f
clg %r9,BASED(.Lcleanup_save_fpu_regs_vx_low)
jhe 2f
clg %r9,BASED(.Lcleanup_save_fpu_fpc_end)
jhe 1f
lg %r2,__LC_CURRENT
aghi %r2,__TASK_thread
0: # Store floating-point controls
stfpc __THREAD_FPU_fpc(%r2)
1: # Load register save area and check if VX is active
lg %r3,__THREAD_FPU_regs(%r2)
TSTMSK __LC_MACHINE_FLAGS,MACHINE_FLAG_VX
jz 4f # no VX -> store FP regs
2: # Store vector registers (V0-V15)
VSTM %v0,%v15,0,%r3 # vstm 0,15,0(3)
3: # Store vector registers (V16-V31)
VSTM %v16,%v31,256,%r3 # vstm 16,31,256(3)
j 5f # -> done, set CIF_FPU flag
4: # Store floating-point registers
std 0,0(%r3)
std 1,8(%r3)
std 2,16(%r3)
std 3,24(%r3)
std 4,32(%r3)
std 5,40(%r3)
std 6,48(%r3)
std 7,56(%r3)
std 8,64(%r3)
std 9,72(%r3)
std 10,80(%r3)
std 11,88(%r3)
std 12,96(%r3)
std 13,104(%r3)
std 14,112(%r3)
std 15,120(%r3)
5: # Set CIF_FPU flag
oi __LC_CPU_FLAGS+7,_CIF_FPU
lg %r9,48(%r11) # return from save_fpu_regs
larl %r9,save_fpu_regs
br %r14
.Lcleanup_save_fpu_fpc_end:
.quad .Lsave_fpu_regs_fpc_end
.Lcleanup_save_fpu_regs_vx_low:
.quad .Lsave_fpu_regs_vx_low
.Lcleanup_save_fpu_regs_vx_high:
.quad .Lsave_fpu_regs_vx_high
.Lcleanup_save_fpu_regs_fp:
.quad .Lsave_fpu_regs_fp
.Lcleanup_save_fpu_regs_done:
.quad .Lsave_fpu_regs_done
.Lcleanup_load_fpu_regs:
TSTMSK __LC_CPU_FLAGS,_CIF_FPU
bnor %r14
clg %r9,BASED(.Lcleanup_load_fpu_regs_done)
jhe 1f
clg %r9,BASED(.Lcleanup_load_fpu_regs_fp)
jhe 2f
clg %r9,BASED(.Lcleanup_load_fpu_regs_vx_high)
jhe 3f
clg %r9,BASED(.Lcleanup_load_fpu_regs_vx)
jhe 4f
lg %r4,__LC_CURRENT
aghi %r4,__TASK_thread
lfpc __THREAD_FPU_fpc(%r4)
TSTMSK __LC_MACHINE_FLAGS,MACHINE_FLAG_VX
lg %r4,__THREAD_FPU_regs(%r4) # %r4 <- reg save area
jz 2f # -> no VX, load FP regs
4: # Load V0 ..V15 registers
VLM %v0,%v15,0,%r4
3: # Load V16..V31 registers
VLM %v16,%v31,256,%r4
j 1f
2: # Load floating-point registers
ld 0,0(%r4)
ld 1,8(%r4)
ld 2,16(%r4)
ld 3,24(%r4)
ld 4,32(%r4)
ld 5,40(%r4)
ld 6,48(%r4)
ld 7,56(%r4)
ld 8,64(%r4)
ld 9,72(%r4)
ld 10,80(%r4)
ld 11,88(%r4)
ld 12,96(%r4)
ld 13,104(%r4)
ld 14,112(%r4)
ld 15,120(%r4)
1: # Clear CIF_FPU bit
ni __LC_CPU_FLAGS+7,255-_CIF_FPU
lg %r9,48(%r11) # return from load_fpu_regs
larl %r9,load_fpu_regs
br %r14
.Lcleanup_load_fpu_regs_vx:
.quad .Lload_fpu_regs_vx
.Lcleanup_load_fpu_regs_vx_high:
.quad .Lload_fpu_regs_vx_high
.Lcleanup_load_fpu_regs_fp:
.quad .Lload_fpu_regs_fp
.Lcleanup_load_fpu_regs_done:
.quad .Lload_fpu_regs_done
/*
* Integer constants

3
arch/s390/kernel/irq.c
View File

@ -164,8 +164,7 @@ void do_softirq_own_stack(void)
{
unsigned long old, new;
/* Get current stack pointer. */
asm volatile("la %0,0(15)" : "=a" (old));
old = current_stack_pointer();
/* Check against async. stack address range. */
new = S390_lowcore.async_stack;
if (((new - old) >> (PAGE_SHIFT + THREAD_ORDER)) != 0) {

2
arch/s390/kernel/perf_cpum_cf.c
View File

@ -383,7 +383,7 @@ static int __hw_perf_event_init(struct perf_event *event)
/* Validate the counter that is assigned to this event.
* Because the counter facility can use numerous counters at the
* same time without constraints, it is not necessary to explicity
* same time without constraints, it is not necessary to explicitly
* validate event groups (event->group_leader != event).
*/
err = validate_event(hwc);

9
arch/s390/kernel/perf_cpum_sf.c
View File

@ -1022,10 +1022,13 @@ static int perf_push_sample(struct perf_event *event, struct sf_raw_sample *sfr)
/*
* A non-zero guest program parameter indicates a guest
* sample.
* Note that some early samples might be misaccounted to
* the host.
* Note that some early samples or samples from guests without
* lpp usage would be misaccounted to the host. We use the asn
* value as a heuristic to detect most of these guest samples.
* If the value differs from the host hpp value, we assume
* it to be a KVM guest.
*/
if (sfr->basic.gpp)
if (sfr->basic.gpp || sfr->basic.prim_asn != (u16) sfr->basic.hpp)
sde_regs->in_guest = 1;
overflow = 0;

56
arch/s390/kernel/perf_event.c
View File

@ -222,67 +222,23 @@ static int __init service_level_perf_register(void)
}
arch_initcall(service_level_perf_register);
/* See also arch/s390/kernel/traps.c */
static unsigned long __store_trace(struct perf_callchain_entry *entry,
unsigned long sp,
unsigned long low, unsigned long high)
static int __perf_callchain_kernel(void *data, unsigned long address)
{
struct stack_frame *sf;
struct pt_regs *regs;
struct perf_callchain_entry *entry = data;
while (1) {
if (sp < low || sp > high - sizeof(*sf))
return sp;
sf = (struct stack_frame *) sp;
perf_callchain_store(entry, sf->gprs[8]);
/* Follow the backchain. */
while (1) {
low = sp;
sp = sf->back_chain;
if (!sp)
break;
if (sp <= low || sp > high - sizeof(*sf))
return sp;
sf = (struct stack_frame *) sp;
perf_callchain_store(entry, sf->gprs[8]);
}
/* Zero backchain detected, check for interrupt frame. */
sp = (unsigned long) (sf + 1);
if (sp <= low || sp > high - sizeof(*regs))
return sp;
regs = (struct pt_regs *) sp;
perf_callchain_store(entry, sf->gprs[8]);
low = sp;
sp = regs->gprs[15];
}
perf_callchain_store(entry, address);
return 0;
}
void perf_callchain_kernel(struct perf_callchain_entry *entry,
struct pt_regs *regs)
{
unsigned long head, frame_size;
struct stack_frame *head_sf;
if (user_mode(regs))
return;
frame_size = STACK_FRAME_OVERHEAD + sizeof(struct pt_regs);
head = regs->gprs[15];
head_sf = (struct stack_frame *) head;
if (!head_sf || !head_sf->back_chain)
return;
head = head_sf->back_chain;
head = __store_trace(entry, head,
S390_lowcore.async_stack + frame_size - ASYNC_SIZE,
S390_lowcore.async_stack + frame_size);
__store_trace(entry, head, S390_lowcore.thread_info,
S390_lowcore.thread_info + THREAD_SIZE);
dump_trace(__perf_callchain_kernel, entry, NULL, regs->gprs[15]);
}
/* Perf defintions for PMU event attributes in sysfs */
/* Perf definitions for PMU event attributes in sysfs */
ssize_t cpumf_events_sysfs_show(struct device *dev,
struct device_attribute *attr, char *page)
{

2
arch/s390/kernel/setup.c
View File

@ -327,6 +327,7 @@ static void __init setup_lowcore(void)
+ PAGE_SIZE - STACK_FRAME_OVERHEAD - sizeof(struct pt_regs);
lc->current_task = (unsigned long) init_thread_union.thread_info.task;
lc->thread_info = (unsigned long) &init_thread_union;
lc->lpp = LPP_MAGIC;
lc->machine_flags = S390_lowcore.machine_flags;
lc->stfl_fac_list = S390_lowcore.stfl_fac_list;
memcpy(lc->stfle_fac_list, S390_lowcore.stfle_fac_list,
@ -779,6 +780,7 @@ static int __init setup_hwcaps(void)
strcpy(elf_platform, "zEC12");
break;
case 0x2964:
case 0x2965:
strcpy(elf_platform, "z13");
break;
}

93
arch/s390/kernel/stacktrace.c
View File

@ -10,78 +10,39 @@
#include <linux/kallsyms.h>
#include <linux/module.h>
static unsigned long save_context_stack(struct stack_trace *trace,
unsigned long sp,
unsigned long low,
unsigned long high,
int savesched)
static int __save_address(void *data, unsigned long address, int nosched)
{
struct stack_frame *sf;
struct pt_regs *regs;
unsigned long addr;
struct stack_trace *trace = data;
while(1) {
if (sp < low || sp > high)
return sp;
sf = (struct stack_frame *)sp;
while(1) {
addr = sf->gprs[8];
if (!trace->skip)
trace->entries[trace->nr_entries++] = addr;
else
trace->skip--;
if (trace->nr_entries >= trace->max_entries)
return sp;
low = sp;
sp = sf->back_chain;
if (!sp)
break;
if (sp <= low || sp > high - sizeof(*sf))
return sp;
sf = (struct stack_frame *)sp;
}
/* Zero backchain detected, check for interrupt frame. */
sp = (unsigned long)(sf + 1);
if (sp <= low || sp > high - sizeof(*regs))
return sp;
regs = (struct pt_regs *)sp;
addr = regs->psw.addr;
if (savesched || !in_sched_functions(addr)) {
if (!trace->skip)
trace->entries[trace->nr_entries++] = addr;
else
trace->skip--;
}
if (trace->nr_entries >= trace->max_entries)
return sp;
low = sp;
sp = regs->gprs[15];
if (nosched && in_sched_functions(address))
return 0;
if (trace->skip > 0) {
trace->skip--;
return 0;
}
if (trace->nr_entries < trace->max_entries) {
trace->entries[trace->nr_entries++] = address;
return 0;
}
return 1;
}
static void __save_stack_trace(struct stack_trace *trace, unsigned long sp)
static int save_address(void *data, unsigned long address)
{
unsigned long new_sp, frame_size;
return __save_address(data, address, 0);
}
frame_size = STACK_FRAME_OVERHEAD + sizeof(struct pt_regs);
new_sp = save_context_stack(trace, sp,
S390_lowcore.panic_stack + frame_size - PAGE_SIZE,
S390_lowcore.panic_stack + frame_size, 1);
new_sp = save_context_stack(trace, new_sp,
S390_lowcore.async_stack + frame_size - ASYNC_SIZE,
S390_lowcore.async_stack + frame_size, 1);
save_context_stack(trace, new_sp,
S390_lowcore.thread_info,
S390_lowcore.thread_info + THREAD_SIZE, 1);
static int save_address_nosched(void *data, unsigned long address)
{
return __save_address(data, address, 1);
}
void save_stack_trace(struct stack_trace *trace)
{
register unsigned long r15 asm ("15");
unsigned long sp;
sp = r15;
__save_stack_trace(trace, sp);
sp = current_stack_pointer();
dump_trace(save_address, trace, NULL, sp);
if (trace->nr_entries < trace->max_entries)
trace->entries[trace->nr_entries++] = ULONG_MAX;
}
@ -89,16 +50,12 @@ EXPORT_SYMBOL_GPL(save_stack_trace);
void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace)
{
unsigned long sp, low, high;
unsigned long sp;
sp = tsk->thread.ksp;
if (tsk == current) {
/* Get current stack pointer. */
asm volatile("la %0,0(15)" : "=a" (sp));
}
low = (unsigned long) task_stack_page(tsk);
high = (unsigned long) task_pt_regs(tsk);
save_context_stack(trace, sp, low, high, 0);
if (tsk == current)
sp = current_stack_pointer();
dump_trace(save_address_nosched, trace, tsk, sp);
if (trace->nr_entries < trace->max_entries)
trace->entries[trace->nr_entries++] = ULONG_MAX;
}
@ -109,7 +66,7 @@ void save_stack_trace_regs(struct pt_regs *regs, struct stack_trace *trace)
unsigned long sp;
sp = kernel_stack_pointer(regs);
__save_stack_trace(trace, sp);
dump_trace(save_address, trace, NULL, sp);
if (trace->nr_entries < trace->max_entries)
trace->entries[trace->nr_entries++] = ULONG_MAX;
}

6
arch/s390/kernel/time.c
View File

@ -499,8 +499,7 @@ static void etr_reset(void)
if (etr_port0_online && etr_port1_online)
set_bit(CLOCK_SYNC_ETR, &clock_sync_flags);
} else if (etr_port0_online || etr_port1_online) {
pr_warning("The real or virtual hardware system does "
"not provide an ETR interface\n");
pr_warn("The real or virtual hardware system does not provide an ETR interface\n");
etr_port0_online = etr_port1_online = 0;
}
}
@ -1464,8 +1463,7 @@ static void __init stp_reset(void)
if (rc == 0)
set_bit(CLOCK_SYNC_HAS_STP, &clock_sync_flags);
else if (stp_online) {
pr_warning("The real or virtual hardware system does "
"not provide an STP interface\n");
pr_warn("The real or virtual hardware system does not provide an STP interface\n");
free_page((unsigned long) stp_page);
stp_page = NULL;
stp_online = 0;

21
arch/s390/kernel/traps.c
View File

@ -22,8 +22,6 @@
#include <asm/fpu/api.h>
#include "entry.h"
int show_unhandled_signals = 1;
static inline void __user *get_trap_ip(struct pt_regs *regs)
{
unsigned long address;
@ -35,21 +33,6 @@ static inline void __user *get_trap_ip(struct pt_regs *regs)
return (void __user *) (address - (regs->int_code >> 16));
}
static inline void report_user_fault(struct pt_regs *regs, int signr)
{
if ((task_pid_nr(current) > 1) && !show_unhandled_signals)
return;
if (!unhandled_signal(current, signr))
return;
if (!printk_ratelimit())
return;
printk("User process fault: interruption code %04x ilc:%d ",
regs->int_code & 0xffff, regs->int_code >> 17);
print_vma_addr("in ", regs->psw.addr);
printk("\n");
show_regs(regs);
}
int is_valid_bugaddr(unsigned long addr)
{
return 1;
@ -65,7 +48,7 @@ void do_report_trap(struct pt_regs *regs, int si_signo, int si_code, char *str)
info.si_code = si_code;
info.si_addr = get_trap_ip(regs);
force_sig_info(si_signo, &info, current);
report_user_fault(regs, si_signo);
report_user_fault(regs, si_signo, 0);
} else {
const struct exception_table_entry *fixup;
fixup = search_exception_tables(regs->psw.addr);
@ -111,7 +94,7 @@ NOKPROBE_SYMBOL(do_per_trap);
void default_trap_handler(struct pt_regs *regs)
{
if (user_mode(regs)) {
report_user_fault(regs, SIGSEGV);
report_user_fault(regs, SIGSEGV, 0);
do_exit(SIGSEGV);
} else
die(regs, "Unknown program exception");

1
arch/s390/kvm/diag.c
View File

@ -14,6 +14,7 @@
#include <linux/kvm.h>
#include <linux/kvm_host.h>
#include <asm/pgalloc.h>
#include <asm/gmap.h>
#include <asm/virtio-ccw.h>
#include "kvm-s390.h"
#include "trace.h"

4
arch/s390/kvm/guestdbg.c
View File

@ -17,7 +17,7 @@
/*
* Extends the address range given by *start and *stop to include the address
* range starting with estart and the length len. Takes care of overflowing
* intervals and tries to minimize the overall intervall size.
* intervals and tries to minimize the overall interval size.
*/
static void extend_address_range(u64 *start, u64 *stop, u64 estart, int len)
{
@ -72,7 +72,7 @@ static void enable_all_hw_bp(struct kvm_vcpu *vcpu)
return;
/*
* If the guest is not interrested in branching events, we can savely
* If the guest is not interested in branching events, we can safely
* limit them to the PER address range.
*/
if (!(*cr9 & PER_EVENT_BRANCH))

1
arch/s390/kvm/interrupt.c
View File

@ -23,6 +23,7 @@
#include <asm/uaccess.h>
#include <asm/sclp.h>
#include <asm/isc.h>
#include <asm/gmap.h>
#include "kvm-s390.h"
#include "gaccess.h"
#include "trace-s390.h"

3
arch/s390/kvm/kvm-s390.c
View File

@ -30,6 +30,7 @@
#include <asm/lowcore.h>
#include <asm/etr.h>
#include <asm/pgtable.h>
#include <asm/gmap.h>
#include <asm/nmi.h>
#include <asm/switch_to.h>
#include <asm/isc.h>
@ -281,7 +282,7 @@ static void kvm_s390_sync_dirty_log(struct kvm *kvm,
for (cur_gfn = memslot->base_gfn; cur_gfn <= last_gfn; cur_gfn++) {
address = gfn_to_hva_memslot(memslot, cur_gfn);
if (gmap_test_and_clear_dirty(address, gmap))
if (test_and_clear_guest_dirty(gmap->mm, address))
mark_page_dirty(kvm, cur_gfn);
if (fatal_signal_pending(current))
return;

1
arch/s390/kvm/priv.c
View File

@ -23,6 +23,7 @@
#include <asm/sysinfo.h>
#include <asm/pgtable.h>
#include <asm/pgalloc.h>
#include <asm/gmap.h>
#include <asm/io.h>
#include <asm/ptrace.h>
#include <asm/compat.h>

2
arch/s390/lib/Makefile
View File

@ -3,7 +3,7 @@
#
lib-y += delay.o string.o uaccess.o find.o
obj-y += mem.o
obj-y += mem.o xor.o
lib-$(CONFIG_SMP) += spinlock.o
lib-$(CONFIG_KPROBES) += probes.o
lib-$(CONFIG_UPROBES) += probes.o

134
arch/s390/lib/xor.c Normal file
View File

@ -0,0 +1,134 @@
/*
* Optimized xor_block operation for RAID4/5
*
* Copyright IBM Corp. 2016
* Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
*/
#include <linux/types.h>
#include <linux/module.h>
#include <linux/raid/xor.h>
static void xor_xc_2(unsigned long bytes, unsigned long *p1, unsigned long *p2)
{
asm volatile(
" larl 1,2f\n"
" aghi %0,-1\n"
" jm 3f\n"
" srlg 0,%0,8\n"
" ltgr 0,0\n"
" jz 1f\n"
"0: xc 0(256,%1),0(%2)\n"
" la %1,256(%1)\n"
" la %2,256(%2)\n"
" brctg 0,0b\n"
"1: ex %0,0(1)\n"
" j 3f\n"
"2: xc 0(1,%1),0(%2)\n"
"3:\n"
: : "d" (bytes), "a" (p1), "a" (p2)
: "0", "1", "cc", "memory");
}
static void xor_xc_3(unsigned long bytes, unsigned long *p1, unsigned long *p2,
unsigned long *p3)
{
asm volatile(
" larl 1,2f\n"
" aghi %0,-1\n"
" jm 3f\n"
" srlg 0,%0,8\n"
" ltgr 0,0\n"
" jz 1f\n"
"0: xc 0(256,%1),0(%2)\n"
" xc 0(256,%1),0(%3)\n"
" la %1,256(%1)\n"
" la %2,256(%2)\n"
" la %3,256(%3)\n"
" brctg 0,0b\n"
"1: ex %0,0(1)\n"
" ex %0,6(1)\n"
" j 3f\n"
"2: xc 0(1,%1),0(%2)\n"
" xc 0(1,%1),0(%3)\n"
"3:\n"
: "+d" (bytes), "+a" (p1), "+a" (p2), "+a" (p3)
: : "0", "1", "cc", "memory");
}
static void xor_xc_4(unsigned long bytes, unsigned long *p1, unsigned long *p2,
unsigned long *p3, unsigned long *p4)
{
asm volatile(
" larl 1,2f\n"
" aghi %0,-1\n"
" jm 3f\n"
" srlg 0,%0,8\n"
" ltgr 0,0\n"
" jz 1f\n"
"0: xc 0(256,%1),0(%2)\n"
" xc 0(256,%1),0(%3)\n"
" xc 0(256,%1),0(%4)\n"
" la %1,256(%1)\n"
" la %2,256(%2)\n"
" la %3,256(%3)\n"
" la %4,256(%4)\n"
" brctg 0,0b\n"
"1: ex %0,0(1)\n"
" ex %0,6(1)\n"
" ex %0,12(1)\n"
" j 3f\n"
"2: xc 0(1,%1),0(%2)\n"
" xc 0(1,%1),0(%3)\n"
" xc 0(1,%1),0(%4)\n"
"3:\n"
: "+d" (bytes), "+a" (p1), "+a" (p2), "+a" (p3), "+a" (p4)
: : "0", "1", "cc", "memory");
}
static void xor_xc_5(unsigned long bytes, unsigned long *p1, unsigned long *p2,
unsigned long *p3, unsigned long *p4, unsigned long *p5)
{
/* Get around a gcc oddity */
register unsigned long *reg7 asm ("7") = p5;
asm volatile(
" larl 1,2f\n"
" aghi %0,-1\n"
" jm 3f\n"
" srlg 0,%0,8\n"
" ltgr 0,0\n"
" jz 1f\n"
"0: xc 0(256,%1),0(%2)\n"
" xc 0(256,%1),0(%3)\n"
" xc 0(256,%1),0(%4)\n"
" xc 0(256,%1),0(%5)\n"
" la %1,256(%1)\n"
" la %2,256(%2)\n"
" la %3,256(%3)\n"
" la %4,256(%4)\n"
" la %5,256(%5)\n"
" brctg 0,0b\n"
"1: ex %0,0(1)\n"
" ex %0,6(1)\n"
" ex %0,12(1)\n"
" ex %0,18(1)\n"
" j 3f\n"
"2: xc 0(1,%1),0(%2)\n"
" xc 0(1,%1),0(%3)\n"
" xc 0(1,%1),0(%4)\n"
" xc 0(1,%1),0(%5)\n"
"3:\n"
: "+d" (bytes), "+a" (p1), "+a" (p2), "+a" (p3), "+a" (p4),
"+a" (reg7)
: : "0", "1", "cc", "memory");
}
struct xor_block_template xor_block_xc = {
.name = "xc",
.do_2 = xor_xc_2,
.do_3 = xor_xc_3,
.do_4 = xor_xc_4,
.do_5 = xor_xc_5,
};
EXPORT_SYMBOL(xor_block_xc);

4
arch/s390/mm/Makefile
View File

@ -2,9 +2,11 @@
# Makefile for the linux s390-specific parts of the memory manager.
#
obj-y := init.o fault.o extmem.o mmap.o vmem.o pgtable.o maccess.o
obj-y := init.o fault.o extmem.o mmap.o vmem.o maccess.o
obj-y += page-states.o gup.o extable.o pageattr.o mem_detect.o
obj-y += pgtable.o pgalloc.o
obj-$(CONFIG_CMM) += cmm.o
obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o
obj-$(CONFIG_S390_PTDUMP) += dump_pagetables.o
obj-$(CONFIG_PGSTE) += gmap.o

16
arch/s390/mm/extmem.c
View File

@ -265,7 +265,7 @@ query_segment_type (struct dcss_segment *seg)
goto out_free;
}
if (diag_cc > 1) {
pr_warning("Querying a DCSS type failed with rc=%ld\n", vmrc);
pr_warn("Querying a DCSS type failed with rc=%ld\n", vmrc);
rc = dcss_diag_translate_rc (vmrc);
goto out_free;
}
@ -457,8 +457,7 @@ __segment_load (char *name, int do_nonshared, unsigned long *addr, unsigned long
goto out_resource;
}
if (diag_cc > 1) {
pr_warning("Loading DCSS %s failed with rc=%ld\n", name,
end_addr);
pr_warn("Loading DCSS %s failed with rc=%ld\n", name, end_addr);
rc = dcss_diag_translate_rc(end_addr);
dcss_diag(&purgeseg_scode, seg->dcss_name,
&dummy, &dummy);
@ -574,8 +573,7 @@ segment_modify_shared (char *name, int do_nonshared)
goto out_unlock;
}
if (atomic_read (&seg->ref_count) != 1) {
pr_warning("DCSS %s is in use and cannot be reloaded\n",
name);
pr_warn("DCSS %s is in use and cannot be reloaded\n", name);
rc = -EAGAIN;
goto out_unlock;
}
@ -588,8 +586,8 @@ segment_modify_shared (char *name, int do_nonshared)
seg->res->flags |= IORESOURCE_READONLY;
if (request_resource(&iomem_resource, seg->res)) {
pr_warning("DCSS %s overlaps with used memory resources "
"and cannot be reloaded\n", name);
pr_warn("DCSS %s overlaps with used memory resources and cannot be reloaded\n",
name);
rc = -EBUSY;
kfree(seg->res);
goto out_del_mem;
@ -607,8 +605,8 @@ segment_modify_shared (char *name, int do_nonshared)
goto out_del_res;
}
if (diag_cc > 1) {
pr_warning("Reloading DCSS %s failed with rc=%ld\n", name,
end_addr);
pr_warn("Reloading DCSS %s failed with rc=%ld\n",
name, end_addr);
rc = dcss_diag_translate_rc(end_addr);
goto out_del_res;
}

16
arch/s390/mm/fault.c
View File

@ -32,6 +32,7 @@
#include <asm/asm-offsets.h>
#include <asm/diag.h>
#include <asm/pgtable.h>
#include <asm/gmap.h>
#include <asm/irq.h>
#include <asm/mmu_context.h>
#include <asm/facility.h>
@ -183,6 +184,8 @@ static void dump_fault_info(struct pt_regs *regs)
{
unsigned long asce;
pr_alert("Failing address: %016lx TEID: %016lx\n",
regs->int_parm_long & __FAIL_ADDR_MASK, regs->int_parm_long);
pr_alert("Fault in ");
switch (regs->int_parm_long & 3) {
case 3:
@ -218,7 +221,9 @@ static void dump_fault_info(struct pt_regs *regs)
dump_pagetable(asce, regs->int_parm_long & __FAIL_ADDR_MASK);
}
static inline void report_user_fault(struct pt_regs *regs, long signr)
int show_unhandled_signals = 1;
void report_user_fault(struct pt_regs *regs, long signr, int is_mm_fault)
{
if ((task_pid_nr(current) > 1) && !show_unhandled_signals)
return;
@ -230,9 +235,8 @@ static inline void report_user_fault(struct pt_regs *regs, long signr)
regs->int_code & 0xffff, regs->int_code >> 17);
print_vma_addr(KERN_CONT "in ", regs->psw.addr);
printk(KERN_CONT "\n");
printk(KERN_ALERT "failing address: %016lx TEID: %016lx\n",
regs->int_parm_long & __FAIL_ADDR_MASK, regs->int_parm_long);
dump_fault_info(regs);
if (is_mm_fault)
dump_fault_info(regs);
show_regs(regs);
}
@ -244,7 +248,7 @@ static noinline void do_sigsegv(struct pt_regs *regs, int si_code)
{
struct siginfo si;
report_user_fault(regs, SIGSEGV);
report_user_fault(regs, SIGSEGV, 1);
si.si_signo = SIGSEGV;
si.si_code = si_code;
si.si_addr = (void __user *)(regs->int_parm_long & __FAIL_ADDR_MASK);
@ -272,8 +276,6 @@ static noinline void do_no_context(struct pt_regs *regs)
else
printk(KERN_ALERT "Unable to handle kernel paging request"
" in virtual user address space\n");
printk(KERN_ALERT "failing address: %016lx TEID: %016lx\n",
regs->int_parm_long & __FAIL_ADDR_MASK, regs->int_parm_long);
dump_fault_info(regs);
die(regs, "Oops");
do_exit(SIGKILL);

774
arch/s390/mm/gmap.c Normal file
View File

@ -0,0 +1,774 @@
/*
* KVM guest address space mapping code
*
* Copyright IBM Corp. 2007, 2016
* Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
*/
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/swap.h>
#include <linux/smp.h>
#include <linux/spinlock.h>
#include <linux/slab.h>
#include <linux/swapops.h>
#include <linux/ksm.h>
#include <linux/mman.h>
#include <asm/pgtable.h>
#include <asm/pgalloc.h>
#include <asm/gmap.h>
#include <asm/tlb.h>
/**
* gmap_alloc - allocate a guest address space
* @mm: pointer to the parent mm_struct
* @limit: maximum size of the gmap address space
*
* Returns a guest address space structure.
*/
struct gmap *gmap_alloc(struct mm_struct *mm, unsigned long limit)
{
struct gmap *gmap;
struct page *page;
unsigned long *table;
unsigned long etype, atype;
if (limit < (1UL << 31)) {
limit = (1UL << 31) - 1;
atype = _ASCE_TYPE_SEGMENT;
etype = _SEGMENT_ENTRY_EMPTY;
} else if (limit < (1UL << 42)) {
limit = (1UL << 42) - 1;
atype = _ASCE_TYPE_REGION3;
etype = _REGION3_ENTRY_EMPTY;
} else if (limit < (1UL << 53)) {
limit = (1UL << 53) - 1;
atype = _ASCE_TYPE_REGION2;
etype = _REGION2_ENTRY_EMPTY;
} else {
limit = -1UL;
atype = _ASCE_TYPE_REGION1;
etype = _REGION1_ENTRY_EMPTY;
}
gmap = kzalloc(sizeof(struct gmap), GFP_KERNEL);
if (!gmap)
goto out;
INIT_LIST_HEAD(&gmap->crst_list);
INIT_RADIX_TREE(&gmap->guest_to_host, GFP_KERNEL);
INIT_RADIX_TREE(&gmap->host_to_guest, GFP_ATOMIC);
spin_lock_init(&gmap->guest_table_lock);
gmap->mm = mm;
page = alloc_pages(GFP_KERNEL, 2);
if (!page)
goto out_free;
page->index = 0;
list_add(&page->lru, &gmap->crst_list);
table = (unsigned long *) page_to_phys(page);
crst_table_init(table, etype);
gmap->table = table;
gmap->asce = atype | _ASCE_TABLE_LENGTH |
_ASCE_USER_BITS | __pa(table);
gmap->asce_end = limit;
down_write(&mm->mmap_sem);
list_add(&gmap->list, &mm->context.gmap_list);
up_write(&mm->mmap_sem);
return gmap;
out_free:
kfree(gmap);
out:
return NULL;
}
EXPORT_SYMBOL_GPL(gmap_alloc);
static void gmap_flush_tlb(struct gmap *gmap)
{
if (MACHINE_HAS_IDTE)
__tlb_flush_asce(gmap->mm, gmap->asce);
else
__tlb_flush_global();
}
static void gmap_radix_tree_free(struct radix_tree_root *root)
{
struct radix_tree_iter iter;
unsigned long indices[16];
unsigned long index;
void **slot;
int i, nr;
/* A radix tree is freed by deleting all of its entries */
index = 0;
do {
nr = 0;
radix_tree_for_each_slot(slot, root, &iter, index) {
indices[nr] = iter.index;
if (++nr == 16)
break;
}
for (i = 0; i < nr; i++) {
index = indices[i];
radix_tree_delete(root, index);
}
} while (nr > 0);
}
/**
* gmap_free - free a guest address space
* @gmap: pointer to the guest address space structure
*/
void gmap_free(struct gmap *gmap)
{
struct page *page, *next;
/* Flush tlb. */
if (MACHINE_HAS_IDTE)
__tlb_flush_asce(gmap->mm, gmap->asce);
else
__tlb_flush_global();
/* Free all segment & region tables. */
list_for_each_entry_safe(page, next, &gmap->crst_list, lru)
__free_pages(page, 2);
gmap_radix_tree_free(&gmap->guest_to_host);
gmap_radix_tree_free(&gmap->host_to_guest);
down_write(&gmap->mm->mmap_sem);
list_del(&gmap->list);
up_write(&gmap->mm->mmap_sem);
kfree(gmap);
}
EXPORT_SYMBOL_GPL(gmap_free);
/**
* gmap_enable - switch primary space to the guest address space
* @gmap: pointer to the guest address space structure
*/
void gmap_enable(struct gmap *gmap)
{
S390_lowcore.gmap = (unsigned long) gmap;
}
EXPORT_SYMBOL_GPL(gmap_enable);
/**
* gmap_disable - switch back to the standard primary address space
* @gmap: pointer to the guest address space structure
*/
void gmap_disable(struct gmap *gmap)
{
S390_lowcore.gmap = 0UL;
}
EXPORT_SYMBOL_GPL(gmap_disable);
/*
* gmap_alloc_table is assumed to be called with mmap_sem held
*/
static int gmap_alloc_table(struct gmap *gmap, unsigned long *table,
unsigned long init, unsigned long gaddr)
{
struct page *page;
unsigned long *new;
/* since we dont free the gmap table until gmap_free we can unlock */
page = alloc_pages(GFP_KERNEL, 2);
if (!page)
return -ENOMEM;
new = (unsigned long *) page_to_phys(page);
crst_table_init(new, init);
spin_lock(&gmap->mm->page_table_lock);
if (*table & _REGION_ENTRY_INVALID) {
list_add(&page->lru, &gmap->crst_list);
*table = (unsigned long) new | _REGION_ENTRY_LENGTH |
(*table & _REGION_ENTRY_TYPE_MASK);
page->index = gaddr;
page = NULL;
}
spin_unlock(&gmap->mm->page_table_lock);
if (page)
__free_pages(page, 2);
return 0;
}
/**
* __gmap_segment_gaddr - find virtual address from segment pointer
* @entry: pointer to a segment table entry in the guest address space
*
* Returns the virtual address in the guest address space for the segment
*/
static unsigned long __gmap_segment_gaddr(unsigned long *entry)
{
struct page *page;
unsigned long offset, mask;
offset = (unsigned long) entry / sizeof(unsigned long);
offset = (offset & (PTRS_PER_PMD - 1)) * PMD_SIZE;
mask = ~(PTRS_PER_PMD * sizeof(pmd_t) - 1);
page = virt_to_page((void *)((unsigned long) entry & mask));
return page->index + offset;
}
/**
* __gmap_unlink_by_vmaddr - unlink a single segment via a host address
* @gmap: pointer to the guest address space structure
* @vmaddr: address in the host process address space
*
* Returns 1 if a TLB flush is required
*/
static int __gmap_unlink_by_vmaddr(struct gmap *gmap, unsigned long vmaddr)
{
unsigned long *entry;
int flush = 0;
spin_lock(&gmap->guest_table_lock);
entry = radix_tree_delete(&gmap->host_to_guest, vmaddr >> PMD_SHIFT);
if (entry) {
flush = (*entry != _SEGMENT_ENTRY_INVALID);
*entry = _SEGMENT_ENTRY_INVALID;
}
spin_unlock(&gmap->guest_table_lock);
return flush;
}
/**
* __gmap_unmap_by_gaddr - unmap a single segment via a guest address
* @gmap: pointer to the guest address space structure
* @gaddr: address in the guest address space
*
* Returns 1 if a TLB flush is required
*/
static int __gmap_unmap_by_gaddr(struct gmap *gmap, unsigned long gaddr)
{
unsigned long vmaddr;
vmaddr = (unsigned long) radix_tree_delete(&gmap->guest_to_host,
gaddr >> PMD_SHIFT);
return vmaddr ? __gmap_unlink_by_vmaddr(gmap, vmaddr) : 0;
}
/**
* gmap_unmap_segment - unmap segment from the guest address space
* @gmap: pointer to the guest address space structure
* @to: address in the guest address space
* @len: length of the memory area to unmap
*
* Returns 0 if the unmap succeeded, -EINVAL if not.
*/
int gmap_unmap_segment(struct gmap *gmap, unsigned long to, unsigned long len)
{
unsigned long off;
int flush;
if ((to | len) & (PMD_SIZE - 1))
return -EINVAL;
if (len == 0 || to + len < to)
return -EINVAL;
flush = 0;
down_write(&gmap->mm->mmap_sem);
for (off = 0; off < len; off += PMD_SIZE)
flush |= __gmap_unmap_by_gaddr(gmap, to + off);
up_write(&gmap->mm->mmap_sem);
if (flush)
gmap_flush_tlb(gmap);
return 0;
}
EXPORT_SYMBOL_GPL(gmap_unmap_segment);
/**
* gmap_map_segment - map a segment to the guest address space
* @gmap: pointer to the guest address space structure
* @from: source address in the parent address space
* @to: target address in the guest address space
* @len: length of the memory area to map
*
* Returns 0 if the mmap succeeded, -EINVAL or -ENOMEM if not.
*/
int gmap_map_segment(struct gmap *gmap, unsigned long from,
unsigned long to, unsigned long len)
{
unsigned long off;
int flush;
if ((from | to | len) & (PMD_SIZE - 1))
return -EINVAL;
if (len == 0 || from + len < from || to + len < to ||
from + len > TASK_MAX_SIZE || to + len > gmap->asce_end)
return -EINVAL;
flush = 0;
down_write(&gmap->mm->mmap_sem);
for (off = 0; off < len; off += PMD_SIZE) {
/* Remove old translation */
flush |= __gmap_unmap_by_gaddr(gmap, to + off);
/* Store new translation */
if (radix_tree_insert(&gmap->guest_to_host,
(to + off) >> PMD_SHIFT,
(void *) from + off))
break;
}
up_write(&gmap->mm->mmap_sem);
if (flush)
gmap_flush_tlb(gmap);
if (off >= len)
return 0;
gmap_unmap_segment(gmap, to, len);
return -ENOMEM;
}
EXPORT_SYMBOL_GPL(gmap_map_segment);
/**
* __gmap_translate - translate a guest address to a user space address
* @gmap: pointer to guest mapping meta data structure
* @gaddr: guest address
*
* Returns user space address which corresponds to the guest address or
* -EFAULT if no such mapping exists.
* This function does not establish potentially missing page table entries.
* The mmap_sem of the mm that belongs to the address space must be held
* when this function gets called.
*/
unsigned long __gmap_translate(struct gmap *gmap, unsigned long gaddr)
{
unsigned long vmaddr;
vmaddr = (unsigned long)
radix_tree_lookup(&gmap->guest_to_host, gaddr >> PMD_SHIFT);
return vmaddr ? (vmaddr | (gaddr & ~PMD_MASK)) : -EFAULT;
}
EXPORT_SYMBOL_GPL(__gmap_translate);
/**
* gmap_translate - translate a guest address to a user space address
* @gmap: pointer to guest mapping meta data structure
* @gaddr: guest address
*
* Returns user space address which corresponds to the guest address or
* -EFAULT if no such mapping exists.
* This function does not establish potentially missing page table entries.
*/
unsigned long gmap_translate(struct gmap *gmap, unsigned long gaddr)
{
unsigned long rc;
down_read(&gmap->mm->mmap_sem);
rc = __gmap_translate(gmap, gaddr);
up_read(&gmap->mm->mmap_sem);
return rc;
}
EXPORT_SYMBOL_GPL(gmap_translate);
/**
* gmap_unlink - disconnect a page table from the gmap shadow tables
* @gmap: pointer to guest mapping meta data structure
* @table: pointer to the host page table
* @vmaddr: vm address associated with the host page table
*/
void gmap_unlink(struct mm_struct *mm, unsigned long *table,
unsigned long vmaddr)
{
struct gmap *gmap;
int flush;
list_for_each_entry(gmap, &mm->context.gmap_list, list) {
flush = __gmap_unlink_by_vmaddr(gmap, vmaddr);
if (flush)
gmap_flush_tlb(gmap);
}
}
/**
* gmap_link - set up shadow page tables to connect a host to a guest address
* @gmap: pointer to guest mapping meta data structure
* @gaddr: guest address
* @vmaddr: vm address
*
* Returns 0 on success, -ENOMEM for out of memory conditions, and -EFAULT
* if the vm address is already mapped to a different guest segment.
* The mmap_sem of the mm that belongs to the address space must be held
* when this function gets called.
*/
int __gmap_link(struct gmap *gmap, unsigned long gaddr, unsigned long vmaddr)
{
struct mm_struct *mm;
unsigned long *table;
spinlock_t *ptl;
pgd_t *pgd;
pud_t *pud;
pmd_t *pmd;
int rc;
/* Create higher level tables in the gmap page table */
table = gmap->table;
if ((gmap->asce & _ASCE_TYPE_MASK) >= _ASCE_TYPE_REGION1) {
table += (gaddr >> 53) & 0x7ff;
if ((*table & _REGION_ENTRY_INVALID) &&
gmap_alloc_table(gmap, table, _REGION2_ENTRY_EMPTY,
gaddr & 0xffe0000000000000UL))
return -ENOMEM;
table = (unsigned long *)(*table & _REGION_ENTRY_ORIGIN);
}
if ((gmap->asce & _ASCE_TYPE_MASK) >= _ASCE_TYPE_REGION2) {
table += (gaddr >> 42) & 0x7ff;
if ((*table & _REGION_ENTRY_INVALID) &&
gmap_alloc_table(gmap, table, _REGION3_ENTRY_EMPTY,
gaddr & 0xfffffc0000000000UL))
return -ENOMEM;
table = (unsigned long *)(*table & _REGION_ENTRY_ORIGIN);
}
if ((gmap->asce & _ASCE_TYPE_MASK) >= _ASCE_TYPE_REGION3) {
table += (gaddr >> 31) & 0x7ff;
if ((*table & _REGION_ENTRY_INVALID) &&
gmap_alloc_table(gmap, table, _SEGMENT_ENTRY_EMPTY,
gaddr & 0xffffffff80000000UL))
return -ENOMEM;
table = (unsigned long *)(*table & _REGION_ENTRY_ORIGIN);
}
table += (gaddr >> 20) & 0x7ff;
/* Walk the parent mm page table */
mm = gmap->mm;
pgd = pgd_offset(mm, vmaddr);
VM_BUG_ON(pgd_none(*pgd));
pud = pud_offset(pgd, vmaddr);
VM_BUG_ON(pud_none(*pud));
pmd = pmd_offset(pud, vmaddr);
VM_BUG_ON(pmd_none(*pmd));
/* large pmds cannot yet be handled */
if (pmd_large(*pmd))
return -EFAULT;
/* Link gmap segment table entry location to page table. */
rc = radix_tree_preload(GFP_KERNEL);
if (rc)
return rc;
ptl = pmd_lock(mm, pmd);
spin_lock(&gmap->guest_table_lock);
if (*table == _SEGMENT_ENTRY_INVALID) {
rc = radix_tree_insert(&gmap->host_to_guest,
vmaddr >> PMD_SHIFT, table);
if (!rc)
*table = pmd_val(*pmd);
} else
rc = 0;
spin_unlock(&gmap->guest_table_lock);
spin_unlock(ptl);
radix_tree_preload_end();
return rc;
}
/**
* gmap_fault - resolve a fault on a guest address
* @gmap: pointer to guest mapping meta data structure
* @gaddr: guest address
* @fault_flags: flags to pass down to handle_mm_fault()
*
* Returns 0 on success, -ENOMEM for out of memory conditions, and -EFAULT
* if the vm address is already mapped to a different guest segment.
*/
int gmap_fault(struct gmap *gmap, unsigned long gaddr,
unsigned int fault_flags)
{
unsigned long vmaddr;
int rc;
bool unlocked;
down_read(&gmap->mm->mmap_sem);
retry:
unlocked = false;
vmaddr = __gmap_translate(gmap, gaddr);
if (IS_ERR_VALUE(vmaddr)) {
rc = vmaddr;
goto out_up;
}
if (fixup_user_fault(current, gmap->mm, vmaddr, fault_flags,
&unlocked)) {
rc = -EFAULT;
goto out_up;
}
/*
* In the case that fixup_user_fault unlocked the mmap_sem during
* faultin redo __gmap_translate to not race with a map/unmap_segment.
*/
if (unlocked)
goto retry;
rc = __gmap_link(gmap, gaddr, vmaddr);
out_up:
up_read(&gmap->mm->mmap_sem);
return rc;
}
EXPORT_SYMBOL_GPL(gmap_fault);
/*
* this function is assumed to be called with mmap_sem held
*/
void __gmap_zap(struct gmap *gmap, unsigned long gaddr)
{
unsigned long vmaddr;
spinlock_t *ptl;
pte_t *ptep;
/* Find the vm address for the guest address */
vmaddr = (unsigned long) radix_tree_lookup(&gmap->guest_to_host,
gaddr >> PMD_SHIFT);
if (vmaddr) {
vmaddr |= gaddr & ~PMD_MASK;
/* Get pointer to the page table entry */
ptep = get_locked_pte(gmap->mm, vmaddr, &ptl);
if (likely(ptep))
ptep_zap_unused(gmap->mm, vmaddr, ptep, 0);
pte_unmap_unlock(ptep, ptl);
}
}
EXPORT_SYMBOL_GPL(__gmap_zap);
void gmap_discard(struct gmap *gmap, unsigned long from, unsigned long to)
{
unsigned long gaddr, vmaddr, size;
struct vm_area_struct *vma;
down_read(&gmap->mm->mmap_sem);
for (gaddr = from; gaddr < to;
gaddr = (gaddr + PMD_SIZE) & PMD_MASK) {
/* Find the vm address for the guest address */
vmaddr = (unsigned long)
radix_tree_lookup(&gmap->guest_to_host,
gaddr >> PMD_SHIFT);
if (!vmaddr)
continue;
vmaddr |= gaddr & ~PMD_MASK;
/* Find vma in the parent mm */
vma = find_vma(gmap->mm, vmaddr);
size = min(to - gaddr, PMD_SIZE - (gaddr & ~PMD_MASK));
zap_page_range(vma, vmaddr, size, NULL);
}
up_read(&gmap->mm->mmap_sem);
}
EXPORT_SYMBOL_GPL(gmap_discard);
static LIST_HEAD(gmap_notifier_list);
static DEFINE_SPINLOCK(gmap_notifier_lock);
/**
* gmap_register_ipte_notifier - register a pte invalidation callback
* @nb: pointer to the gmap notifier block
*/
void gmap_register_ipte_notifier(struct gmap_notifier *nb)
{
spin_lock(&gmap_notifier_lock);
list_add(&nb->list, &gmap_notifier_list);
spin_unlock(&gmap_notifier_lock);
}
EXPORT_SYMBOL_GPL(gmap_register_ipte_notifier);
/**
* gmap_unregister_ipte_notifier - remove a pte invalidation callback
* @nb: pointer to the gmap notifier block
*/
void gmap_unregister_ipte_notifier(struct gmap_notifier *nb)
{
spin_lock(&gmap_notifier_lock);
list_del_init(&nb->list);
spin_unlock(&gmap_notifier_lock);
}
EXPORT_SYMBOL_GPL(gmap_unregister_ipte_notifier);
/**
* gmap_ipte_notify - mark a range of ptes for invalidation notification
* @gmap: pointer to guest mapping meta data structure
* @gaddr: virtual address in the guest address space
* @len: size of area
*
* Returns 0 if for each page in the given range a gmap mapping exists and
* the invalidation notification could be set. If the gmap mapping is missing
* for one or more pages -EFAULT is returned. If no memory could be allocated
* -ENOMEM is returned. This function establishes missing page table entries.
*/
int gmap_ipte_notify(struct gmap *gmap, unsigned long gaddr, unsigned long len)
{
unsigned long addr;
spinlock_t *ptl;
pte_t *ptep;
bool unlocked;
int rc = 0;
if ((gaddr & ~PAGE_MASK) || (len & ~PAGE_MASK))
return -EINVAL;
down_read(&gmap->mm->mmap_sem);
while (len) {
unlocked = false;
/* Convert gmap address and connect the page tables */
addr = __gmap_translate(gmap, gaddr);
if (IS_ERR_VALUE(addr)) {
rc = addr;
break;
}
/* Get the page mapped */
if (fixup_user_fault(current, gmap->mm, addr, FAULT_FLAG_WRITE,
&unlocked)) {
rc = -EFAULT;
break;
}
/* While trying to map mmap_sem got unlocked. Let us retry */
if (unlocked)
continue;
rc = __gmap_link(gmap, gaddr, addr);
if (rc)
break;
/* Walk the process page table, lock and get pte pointer */
ptep = get_locked_pte(gmap->mm, addr, &ptl);
VM_BUG_ON(!ptep);
/* Set notification bit in the pgste of the pte */
if ((pte_val(*ptep) & (_PAGE_INVALID | _PAGE_PROTECT)) == 0) {
ptep_set_notify(gmap->mm, addr, ptep);
gaddr += PAGE_SIZE;
len -= PAGE_SIZE;
}
pte_unmap_unlock(ptep, ptl);
}
up_read(&gmap->mm->mmap_sem);
return rc;
}
EXPORT_SYMBOL_GPL(gmap_ipte_notify);
/**
* ptep_notify - call all invalidation callbacks for a specific pte.
* @mm: pointer to the process mm_struct
* @addr: virtual address in the process address space
* @pte: pointer to the page table entry
*
* This function is assumed to be called with the page table lock held
* for the pte to notify.
*/
void ptep_notify(struct mm_struct *mm, unsigned long vmaddr, pte_t *pte)
{
unsigned long offset, gaddr;
unsigned long *table;
struct gmap_notifier *nb;
struct gmap *gmap;
offset = ((unsigned long) pte) & (255 * sizeof(pte_t));
offset = offset * (4096 / sizeof(pte_t));
spin_lock(&gmap_notifier_lock);
list_for_each_entry(gmap, &mm->context.gmap_list, list) {
table = radix_tree_lookup(&gmap->host_to_guest,
vmaddr >> PMD_SHIFT);
if (!table)
continue;
gaddr = __gmap_segment_gaddr(table) + offset;
list_for_each_entry(nb, &gmap_notifier_list, list)
nb->notifier_call(gmap, gaddr);
}
spin_unlock(&gmap_notifier_lock);
}
EXPORT_SYMBOL_GPL(ptep_notify);
static inline void thp_split_mm(struct mm_struct *mm)
{
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
struct vm_area_struct *vma;
unsigned long addr;
for (vma = mm->mmap; vma != NULL; vma = vma->vm_next) {
for (addr = vma->vm_start;
addr < vma->vm_end;
addr += PAGE_SIZE)
follow_page(vma, addr, FOLL_SPLIT);
vma->vm_flags &= ~VM_HUGEPAGE;
vma->vm_flags |= VM_NOHUGEPAGE;
}
mm->def_flags |= VM_NOHUGEPAGE;
#endif
}
/*
* switch on pgstes for its userspace process (for kvm)
*/
int s390_enable_sie(void)
{
struct mm_struct *mm = current->mm;
/* Do we have pgstes? if yes, we are done */
if (mm_has_pgste(mm))
return 0;
/* Fail if the page tables are 2K */
if (!mm_alloc_pgste(mm))
return -EINVAL;
down_write(&mm->mmap_sem);
mm->context.has_pgste = 1;
/* split thp mappings and disable thp for future mappings */
thp_split_mm(mm);
up_write(&mm->mmap_sem);
return 0;
}
EXPORT_SYMBOL_GPL(s390_enable_sie);
/*
* Enable storage key handling from now on and initialize the storage
* keys with the default key.
*/
static int __s390_enable_skey(pte_t *pte, unsigned long addr,
unsigned long next, struct mm_walk *walk)
{
/*
* Remove all zero page mappings,
* after establishing a policy to forbid zero page mappings
* following faults for that page will get fresh anonymous pages
*/
if (is_zero_pfn(pte_pfn(*pte)))
ptep_xchg_direct(walk->mm, addr, pte, __pte(_PAGE_INVALID));
/* Clear storage key */
ptep_zap_key(walk->mm, addr, pte);
return 0;
}
int s390_enable_skey(void)
{
struct mm_walk walk = { .pte_entry = __s390_enable_skey };
struct mm_struct *mm = current->mm;
struct vm_area_struct *vma;
int rc = 0;
down_write(&mm->mmap_sem);
if (mm_use_skey(mm))
goto out_up;
mm->context.use_skey = 1;
for (vma = mm->mmap; vma; vma = vma->vm_next) {
if (ksm_madvise(vma, vma->vm_start, vma->vm_end,
MADV_UNMERGEABLE, &vma->vm_flags)) {
mm->context.use_skey = 0;
rc = -ENOMEM;
goto out_up;
}
}
mm->def_flags &= ~VM_MERGEABLE;
walk.mm = mm;
walk_page_range(0, TASK_SIZE, &walk);
out_up:
up_write(&mm->mmap_sem);
return rc;
}
EXPORT_SYMBOL_GPL(s390_enable_skey);
/*
* Reset CMMA state, make all pages stable again.
*/
static int __s390_reset_cmma(pte_t *pte, unsigned long addr,
unsigned long next, struct mm_walk *walk)
{
ptep_zap_unused(walk->mm, addr, pte, 1);
return 0;
}
void s390_reset_cmma(struct mm_struct *mm)
{
struct mm_walk walk = { .pte_entry = __s390_reset_cmma };
down_write(&mm->mmap_sem);
walk.mm = mm;
walk_page_range(0, TASK_SIZE, &walk);
up_write(&mm->mmap_sem);
}
EXPORT_SYMBOL_GPL(s390_reset_cmma);

7
arch/s390/mm/hugetlbpage.c
View File

@ -105,11 +105,10 @@ pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
unsigned long addr, pte_t *ptep)
{
pmd_t *pmdp = (pmd_t *) ptep;
pte_t pte = huge_ptep_get(ptep);
pmd_t old;
pmdp_flush_direct(mm, addr, pmdp);
pmd_val(*pmdp) = _SEGMENT_ENTRY_EMPTY;
return pte;
old = pmdp_xchg_direct(mm, addr, pmdp, __pmd(_SEGMENT_ENTRY_EMPTY));
return __pmd_to_pte(old);
}
pte_t *huge_pte_alloc(struct mm_struct *mm,

8
arch/s390/mm/pageattr.c
View File

@ -65,19 +65,17 @@ static pte_t *walk_page_table(unsigned long addr)
static void change_page_attr(unsigned long addr, int numpages,
pte_t (*set) (pte_t))
{
pte_t *ptep, pte;
pte_t *ptep;
int i;
for (i = 0; i < numpages; i++) {
ptep = walk_page_table(addr);
if (WARN_ON_ONCE(!ptep))
break;
pte = *ptep;
pte = set(pte);
__ptep_ipte(addr, ptep);
*ptep = pte;
*ptep = set(*ptep);
addr += PAGE_SIZE;
}
__tlb_flush_kernel();
}
int set_memory_ro(unsigned long addr, int numpages)

360
arch/s390/mm/pgalloc.c Normal file
View File

@ -0,0 +1,360 @@
/*
* Page table allocation functions
*
* Copyright IBM Corp. 2016
* Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
*/
#include <linux/mm.h>
#include <linux/sysctl.h>
#include <asm/mmu_context.h>
#include <asm/pgalloc.h>
#include <asm/gmap.h>
#include <asm/tlb.h>
#include <asm/tlbflush.h>
#ifdef CONFIG_PGSTE
static int page_table_allocate_pgste_min = 0;
static int page_table_allocate_pgste_max = 1;
int page_table_allocate_pgste = 0;
EXPORT_SYMBOL(page_table_allocate_pgste);
static struct ctl_table page_table_sysctl[] = {
{
.procname = "allocate_pgste",
.data = &page_table_allocate_pgste,
.maxlen = sizeof(int),
.mode = S_IRUGO | S_IWUSR,
.proc_handler = proc_dointvec,
.extra1 = &page_table_allocate_pgste_min,
.extra2 = &page_table_allocate_pgste_max,
},
{ }
};
static struct ctl_table page_table_sysctl_dir[] = {
{
.procname = "vm",
.maxlen = 0,
.mode = 0555,
.child = page_table_sysctl,
},
{ }
};
static int __init page_table_register_sysctl(void)
{
return register_sysctl_table(page_table_sysctl_dir) ? 0 : -ENOMEM;
}
__initcall(page_table_register_sysctl);
#endif /* CONFIG_PGSTE */
unsigned long *crst_table_alloc(struct mm_struct *mm)
{
struct page *page = alloc_pages(GFP_KERNEL, 2);
if (!page)
return NULL;
return (unsigned long *) page_to_phys(page);
}
void crst_table_free(struct mm_struct *mm, unsigned long *table)
{
free_pages((unsigned long) table, 2);
}
static void __crst_table_upgrade(void *arg)
{
struct mm_struct *mm = arg;
if (current->active_mm == mm) {
clear_user_asce();
set_user_asce(mm);
}
__tlb_flush_local();
}
int crst_table_upgrade(struct mm_struct *mm, unsigned long limit)
{
unsigned long *table, *pgd;
unsigned long entry;
int flush;
BUG_ON(limit > TASK_MAX_SIZE);
flush = 0;
repeat:
table = crst_table_alloc(mm);
if (!table)
return -ENOMEM;
spin_lock_bh(&mm->page_table_lock);
if (mm->context.asce_limit < limit) {
pgd = (unsigned long *) mm->pgd;
if (mm->context.asce_limit <= (1UL << 31)) {
entry = _REGION3_ENTRY_EMPTY;
mm->context.asce_limit = 1UL << 42;
mm->context.asce_bits = _ASCE_TABLE_LENGTH |
_ASCE_USER_BITS |
_ASCE_TYPE_REGION3;
} else {
entry = _REGION2_ENTRY_EMPTY;
mm->context.asce_limit = 1UL << 53;
mm->context.asce_bits = _ASCE_TABLE_LENGTH |
_ASCE_USER_BITS |
_ASCE_TYPE_REGION2;
}
crst_table_init(table, entry);
pgd_populate(mm, (pgd_t *) table, (pud_t *) pgd);
mm->pgd = (pgd_t *) table;
mm->task_size = mm->context.asce_limit;
table = NULL;
flush = 1;
}
spin_unlock_bh(&mm->page_table_lock);
if (table)
crst_table_free(mm, table);
if (mm->context.asce_limit < limit)
goto repeat;
if (flush)
on_each_cpu(__crst_table_upgrade, mm, 0);
return 0;
}
void crst_table_downgrade(struct mm_struct *mm, unsigned long limit)
{
pgd_t *pgd;
if (current->active_mm == mm) {
clear_user_asce();
__tlb_flush_mm(mm);
}
while (mm->context.asce_limit > limit) {
pgd = mm->pgd;
switch (pgd_val(*pgd) & _REGION_ENTRY_TYPE_MASK) {
case _REGION_ENTRY_TYPE_R2:
mm->context.asce_limit = 1UL << 42;
mm->context.asce_bits = _ASCE_TABLE_LENGTH |
_ASCE_USER_BITS |
_ASCE_TYPE_REGION3;
break;
case _REGION_ENTRY_TYPE_R3:
mm->context.asce_limit = 1UL << 31;
mm->context.asce_bits = _ASCE_TABLE_LENGTH |
_ASCE_USER_BITS |
_ASCE_TYPE_SEGMENT;
break;
default:
BUG();
}
mm->pgd = (pgd_t *) (pgd_val(*pgd) & _REGION_ENTRY_ORIGIN);
mm->task_size = mm->context.asce_limit;
crst_table_free(mm, (unsigned long *) pgd);
}
if (current->active_mm == mm)
set_user_asce(mm);
}
static inline unsigned int atomic_xor_bits(atomic_t *v, unsigned int bits)
{
unsigned int old, new;
do {
old = atomic_read(v);
new = old ^ bits;
} while (atomic_cmpxchg(v, old, new) != old);
return new;
}
/*
* page table entry allocation/free routines.
*/
unsigned long *page_table_alloc(struct mm_struct *mm)
{
unsigned long *table;
struct page *page;
unsigned int mask, bit;
/* Try to get a fragment of a 4K page as a 2K page table */
if (!mm_alloc_pgste(mm)) {
table = NULL;
spin_lock_bh(&mm->context.list_lock);
if (!list_empty(&mm->context.pgtable_list)) {
page = list_first_entry(&mm->context.pgtable_list,
struct page, lru);
mask = atomic_read(&page->_mapcount);
mask = (mask | (mask >> 4)) & 3;
if (mask != 3) {
table = (unsigned long *) page_to_phys(page);
bit = mask & 1; /* =1 -> second 2K */
if (bit)
table += PTRS_PER_PTE;
atomic_xor_bits(&page->_mapcount, 1U << bit);
list_del(&page->lru);
}
}
spin_unlock_bh(&mm->context.list_lock);
if (table)
return table;
}
/* Allocate a fresh page */
page = alloc_page(GFP_KERNEL|__GFP_REPEAT);
if (!page)
return NULL;
if (!pgtable_page_ctor(page)) {
__free_page(page);
return NULL;
}
/* Initialize page table */
table = (unsigned long *) page_to_phys(page);
if (mm_alloc_pgste(mm)) {
/* Return 4K page table with PGSTEs */
atomic_set(&page->_mapcount, 3);
clear_table(table, _PAGE_INVALID, PAGE_SIZE/2);
clear_table(table + PTRS_PER_PTE, 0, PAGE_SIZE/2);
} else {
/* Return the first 2K fragment of the page */
atomic_set(&page->_mapcount, 1);
clear_table(table, _PAGE_INVALID, PAGE_SIZE);
spin_lock_bh(&mm->context.list_lock);
list_add(&page->lru, &mm->context.pgtable_list);
spin_unlock_bh(&mm->context.list_lock);
}
return table;
}
void page_table_free(struct mm_struct *mm, unsigned long *table)
{
struct page *page;
unsigned int bit, mask;
page = pfn_to_page(__pa(table) >> PAGE_SHIFT);
if (!mm_alloc_pgste(mm)) {
/* Free 2K page table fragment of a 4K page */
bit = (__pa(table) & ~PAGE_MASK)/(PTRS_PER_PTE*sizeof(pte_t));
spin_lock_bh(&mm->context.list_lock);
mask = atomic_xor_bits(&page->_mapcount, 1U << bit);
if (mask & 3)
list_add(&page->lru, &mm->context.pgtable_list);
else
list_del(&page->lru);
spin_unlock_bh(&mm->context.list_lock);
if (mask != 0)
return;
}
pgtable_page_dtor(page);
atomic_set(&page->_mapcount, -1);
__free_page(page);
}
void page_table_free_rcu(struct mmu_gather *tlb, unsigned long *table,
unsigned long vmaddr)
{
struct mm_struct *mm;
struct page *page;
unsigned int bit, mask;
mm = tlb->mm;
page = pfn_to_page(__pa(table) >> PAGE_SHIFT);
if (mm_alloc_pgste(mm)) {
gmap_unlink(mm, table, vmaddr);
table = (unsigned long *) (__pa(table) | 3);
tlb_remove_table(tlb, table);
return;
}
bit = (__pa(table) & ~PAGE_MASK) / (PTRS_PER_PTE*sizeof(pte_t));
spin_lock_bh(&mm->context.list_lock);
mask = atomic_xor_bits(&page->_mapcount, 0x11U << bit);
if (mask & 3)
list_add_tail(&page->lru, &mm->context.pgtable_list);
else
list_del(&page->lru);
spin_unlock_bh(&mm->context.list_lock);
table = (unsigned long *) (__pa(table) | (1U << bit));
tlb_remove_table(tlb, table);
}
static void __tlb_remove_table(void *_table)
{
unsigned int mask = (unsigned long) _table & 3;
void *table = (void *)((unsigned long) _table ^ mask);
struct page *page = pfn_to_page(__pa(table) >> PAGE_SHIFT);
switch (mask) {
case 0: /* pmd or pud */
free_pages((unsigned long) table, 2);
break;
case 1: /* lower 2K of a 4K page table */
case 2: /* higher 2K of a 4K page table */
if (atomic_xor_bits(&page->_mapcount, mask << 4) != 0)
break;
/* fallthrough */
case 3: /* 4K page table with pgstes */
pgtable_page_dtor(page);
atomic_set(&page->_mapcount, -1);
__free_page(page);
break;
}
}
static void tlb_remove_table_smp_sync(void *arg)
{
/* Simply deliver the interrupt */
}
static void tlb_remove_table_one(void *table)
{
/*
* This isn't an RCU grace period and hence the page-tables cannot be
* assumed to be actually RCU-freed.
*
* It is however sufficient for software page-table walkers that rely
* on IRQ disabling. See the comment near struct mmu_table_batch.
*/
smp_call_function(tlb_remove_table_smp_sync, NULL, 1);
__tlb_remove_table(table);
}
static void tlb_remove_table_rcu(struct rcu_head *head)
{
struct mmu_table_batch *batch;
int i;
batch = container_of(head, struct mmu_table_batch, rcu);
for (i = 0; i < batch->nr; i++)
__tlb_remove_table(batch->tables[i]);
free_page((unsigned long)batch);
}
void tlb_table_flush(struct mmu_gather *tlb)
{
struct mmu_table_batch **batch = &tlb->batch;
if (*batch) {
call_rcu_sched(&(*batch)->rcu, tlb_remove_table_rcu);
*batch = NULL;
}
}
void tlb_remove_table(struct mmu_gather *tlb, void *table)
{
struct mmu_table_batch **batch = &tlb->batch;
tlb->mm->context.flush_mm = 1;
if (*batch == NULL) {
*batch = (struct mmu_table_batch *)
__get_free_page(GFP_NOWAIT | __GFP_NOWARN);
if (*batch == NULL) {
__tlb_flush_mm_lazy(tlb->mm);
tlb_remove_table_one(table);
return;
}
(*batch)->nr = 0;
}
(*batch)->tables[(*batch)->nr++] = table;
if ((*batch)->nr == MAX_TABLE_BATCH)
tlb_flush_mmu(tlb);
}

1701
arch/s390/mm/pgtable.c
View File

File diff suppressed because it is too large Load Diff

2
arch/s390/oprofile/Makefile
View File

@ -6,5 +6,5 @@ DRIVER_OBJS = $(addprefix ../../../drivers/oprofile/, \
oprofilefs.o oprofile_stats.o \
timer_int.o )
oprofile-y := $(DRIVER_OBJS) init.o backtrace.o
oprofile-y := $(DRIVER_OBJS) init.o
oprofile-y += hwsampler.o

78
arch/s390/oprofile/backtrace.c
View File

@ -1,78 +0,0 @@
/*
* S390 Version
* Copyright IBM Corp. 2005
* Author(s): Andreas Krebbel <Andreas.Krebbel@de.ibm.com>
*/
#include <linux/oprofile.h>
#include <asm/processor.h> /* for struct stack_frame */
static unsigned long
__show_trace(unsigned int *depth, unsigned long sp,
unsigned long low, unsigned long high)
{
struct stack_frame *sf;
struct pt_regs *regs;
while (*depth) {
if (sp < low || sp > high - sizeof(*sf))
return sp;
sf = (struct stack_frame *) sp;
(*depth)--;
oprofile_add_trace(sf->gprs[8]);
/* Follow the backchain. */
while (*depth) {
low = sp;
sp = sf->back_chain;
if (!sp)
break;
if (sp <= low || sp > high - sizeof(*sf))
return sp;
sf = (struct stack_frame *) sp;
(*depth)--;
oprofile_add_trace(sf->gprs[8]);
}
if (*depth == 0)
break;
/* Zero backchain detected, check for interrupt frame. */
sp = (unsigned long) (sf + 1);
if (sp <= low || sp > high - sizeof(*regs))
return sp;
regs = (struct pt_regs *) sp;
(*depth)--;
oprofile_add_trace(sf->gprs[8]);
low = sp;
sp = regs->gprs[15];
}
return sp;
}
void s390_backtrace(struct pt_regs * const regs, unsigned int depth)
{
unsigned long head, frame_size;
struct stack_frame* head_sf;
if (user_mode(regs))
return;
frame_size = STACK_FRAME_OVERHEAD + sizeof(struct pt_regs);
head = regs->gprs[15];
head_sf = (struct stack_frame*)head;
if (!head_sf->back_chain)
return;
head = head_sf->back_chain;
head = __show_trace(&depth, head,
S390_lowcore.async_stack + frame_size - ASYNC_SIZE,
S390_lowcore.async_stack + frame_size);
__show_trace(&depth, head, S390_lowcore.thread_info,
S390_lowcore.thread_info + THREAD_SIZE);
}

21
arch/s390/oprofile/init.c
View File

@ -20,8 +20,6 @@
#include "../../../drivers/oprofile/oprof.h"
extern void s390_backtrace(struct pt_regs * const regs, unsigned int depth);
#include "hwsampler.h"
#include "op_counter.h"
@ -456,6 +454,7 @@ static int oprofile_hwsampler_init(struct oprofile_operations *ops)
case 0x2097: case 0x2098: ops->cpu_type = "s390/z10"; break;
case 0x2817: case 0x2818: ops->cpu_type = "s390/z196"; break;
case 0x2827: case 0x2828: ops->cpu_type = "s390/zEC12"; break;
case 0x2964: case 0x2965: ops->cpu_type = "s390/z13"; break;
default: return -ENODEV;
}
}
@ -494,6 +493,24 @@ static void oprofile_hwsampler_exit(void)
hwsampler_shutdown();
}
static int __s390_backtrace(void *data, unsigned long address)
{
unsigned int *depth = data;
if (*depth == 0)
return 1;
(*depth)--;
oprofile_add_trace(address);
return 0;
}
static void s390_backtrace(struct pt_regs *regs, unsigned int depth)
{
if (user_mode(regs))
return;
dump_trace(__s390_backtrace, &depth, NULL, regs->gprs[15]);
}
int __init oprofile_arch_init(struct oprofile_operations *ops)
{
ops->backtrace = s390_backtrace;

11
arch/s390/pci/pci.c
View File

@ -637,11 +637,9 @@ static void zpci_cleanup_bus_resources(struct zpci_dev *zdev)
int pcibios_add_device(struct pci_dev *pdev)
{
struct zpci_dev *zdev = to_zpci(pdev);
struct resource *res;
int i;
zdev->pdev = pdev;
pdev->dev.groups = zpci_attr_groups;
zpci_map_resources(pdev);
@ -664,8 +662,7 @@ int pcibios_enable_device(struct pci_dev *pdev, int mask)
{
struct zpci_dev *zdev = to_zpci(pdev);
zdev->pdev = pdev;
zpci_debug_init_device(zdev);
zpci_debug_init_device(zdev, dev_name(&pdev->dev));
zpci_fmb_enable_device(zdev);
return pci_enable_resources(pdev, mask);
@ -677,7 +674,6 @@ void pcibios_disable_device(struct pci_dev *pdev)
zpci_fmb_disable_device(zdev);
zpci_debug_exit_device(zdev);
zdev->pdev = NULL;
}
#ifdef CONFIG_HIBERNATE_CALLBACKS
@ -864,8 +860,11 @@ static inline int barsize(u8 size)
static int zpci_mem_init(void)
{
BUILD_BUG_ON(!is_power_of_2(__alignof__(struct zpci_fmb)) ||
__alignof__(struct zpci_fmb) < sizeof(struct zpci_fmb));
zdev_fmb_cache = kmem_cache_create("PCI_FMB_cache", sizeof(struct zpci_fmb),
16, 0, NULL);
__alignof__(struct zpci_fmb), 0, NULL);
if (!zdev_fmb_cache)
goto error_fmb;

247
arch/s390/pci/pci_clp.c
View File

@ -8,13 +8,19 @@
#define KMSG_COMPONENT "zpci"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/compat.h>
#include <linux/kernel.h>
#include <linux/miscdevice.h>
#include <linux/slab.h>
#include <linux/err.h>
#include <linux/delay.h>
#include <linux/pci.h>
#include <linux/uaccess.h>
#include <asm/pci_debug.h>
#include <asm/pci_clp.h>
#include <asm/compat.h>
#include <asm/clp.h>
#include <uapi/asm/clp.h>
static inline void zpci_err_clp(unsigned int rsp, int rc)
{
@ -27,21 +33,43 @@ static inline void zpci_err_clp(unsigned int rsp, int rc)
}
/*
* Call Logical Processor
* Retry logic is handled by the caller.
* Call Logical Processor with c=1, lps=0 and command 1
* to get the bit mask of installed logical processors
*/
static inline u8 clp_instr(void *data)
static inline int clp_get_ilp(unsigned long *ilp)
{
unsigned long mask;
int cc = 3;
asm volatile (
" .insn rrf,0xb9a00000,%[mask],%[cmd],8,0\n"
"0: ipm %[cc]\n"
" srl %[cc],28\n"
"1:\n"
EX_TABLE(0b, 1b)
: [cc] "+d" (cc), [mask] "=d" (mask) : [cmd] "a" (1)
: "cc");
*ilp = mask;
return cc;
}
/*
* Call Logical Processor with c=0, the give constant lps and an lpcb request.
*/
static inline int clp_req(void *data, unsigned int lps)
{
struct { u8 _[CLP_BLK_SIZE]; } *req = data;
u64 ignored;
u8 cc;
int cc = 3;
asm volatile (
" .insn rrf,0xb9a00000,%[ign],%[req],0x0,0x2\n"
" ipm %[cc]\n"
" .insn rrf,0xb9a00000,%[ign],%[req],0,%[lps]\n"
"0: ipm %[cc]\n"
" srl %[cc],28\n"
: [cc] "=d" (cc), [ign] "=d" (ignored), "+m" (*req)
: [req] "a" (req)
"1:\n"
EX_TABLE(0b, 1b)
: [cc] "+d" (cc), [ign] "=d" (ignored), "+m" (*req)
: [req] "a" (req), [lps] "i" (lps)
: "cc");
return cc;
}
@ -90,7 +118,7 @@ static int clp_query_pci_fngrp(struct zpci_dev *zdev, u8 pfgid)
rrb->response.hdr.len = sizeof(rrb->response);
rrb->request.pfgid = pfgid;
rc = clp_instr(rrb);
rc = clp_req(rrb, CLP_LPS_PCI);
if (!rc && rrb->response.hdr.rsp == CLP_RC_OK)
clp_store_query_pci_fngrp(zdev, &rrb->response);
else {
@ -143,7 +171,7 @@ static int clp_query_pci_fn(struct zpci_dev *zdev, u32 fh)
rrb->response.hdr.len = sizeof(rrb->response);
rrb->request.fh = fh;
rc = clp_instr(rrb);
rc = clp_req(rrb, CLP_LPS_PCI);
if (!rc && rrb->response.hdr.rsp == CLP_RC_OK) {
rc = clp_store_query_pci_fn(zdev, &rrb->response);
if (rc)
@ -214,7 +242,7 @@ static int clp_set_pci_fn(u32 *fh, u8 nr_dma_as, u8 command)
rrb->request.oc = command;
rrb->request.ndas = nr_dma_as;
rc = clp_instr(rrb);
rc = clp_req(rrb, CLP_LPS_PCI);
if (rrb->response.hdr.rsp == CLP_RC_SETPCIFN_BUSY) {
retries--;
if (retries < 0)
@ -280,7 +308,7 @@ static int clp_list_pci(struct clp_req_rsp_list_pci *rrb,
rrb->request.resume_token = resume_token;
/* Get PCI function handle list */
rc = clp_instr(rrb);
rc = clp_req(rrb, CLP_LPS_PCI);
if (rc || rrb->response.hdr.rsp != CLP_RC_OK) {
zpci_err("List PCI FN:\n");
zpci_err_clp(rrb->response.hdr.rsp, rc);
@ -391,3 +419,198 @@ int clp_rescan_pci_devices_simple(void)
clp_free_block(rrb);
return rc;
}
static int clp_base_slpc(struct clp_req *req, struct clp_req_rsp_slpc *lpcb)
{
unsigned long limit = PAGE_SIZE - sizeof(lpcb->request);
if (lpcb->request.hdr.len != sizeof(lpcb->request) ||
lpcb->response.hdr.len > limit)
return -EINVAL;
return clp_req(lpcb, CLP_LPS_BASE) ? -EOPNOTSUPP : 0;
}
static int clp_base_command(struct clp_req *req, struct clp_req_hdr *lpcb)
{
switch (lpcb->cmd) {
case 0x0001: /* store logical-processor characteristics */
return clp_base_slpc(req, (void *) lpcb);
default:
return -EINVAL;
}
}
static int clp_pci_slpc(struct clp_req *req, struct clp_req_rsp_slpc *lpcb)
{
unsigned long limit = PAGE_SIZE - sizeof(lpcb->request);
if (lpcb->request.hdr.len != sizeof(lpcb->request) ||
lpcb->response.hdr.len > limit)
return -EINVAL;
return clp_req(lpcb, CLP_LPS_PCI) ? -EOPNOTSUPP : 0;
}
static int clp_pci_list(struct clp_req *req, struct clp_req_rsp_list_pci *lpcb)
{
unsigned long limit = PAGE_SIZE - sizeof(lpcb->request);
if (lpcb->request.hdr.len != sizeof(lpcb->request) ||
lpcb->response.hdr.len > limit)
return -EINVAL;
if (lpcb->request.reserved2 != 0)
return -EINVAL;
return clp_req(lpcb, CLP_LPS_PCI) ? -EOPNOTSUPP : 0;
}
static int clp_pci_query(struct clp_req *req,
struct clp_req_rsp_query_pci *lpcb)
{
unsigned long limit = PAGE_SIZE - sizeof(lpcb->request);
if (lpcb->request.hdr.len != sizeof(lpcb->request) ||
lpcb->response.hdr.len > limit)
return -EINVAL;
if (lpcb->request.reserved2 != 0 || lpcb->request.reserved3 != 0)
return -EINVAL;
return clp_req(lpcb, CLP_LPS_PCI) ? -EOPNOTSUPP : 0;
}
static int clp_pci_query_grp(struct clp_req *req,
struct clp_req_rsp_query_pci_grp *lpcb)
{
unsigned long limit = PAGE_SIZE - sizeof(lpcb->request);
if (lpcb->request.hdr.len != sizeof(lpcb->request) ||
lpcb->response.hdr.len > limit)
return -EINVAL;
if (lpcb->request.reserved2 != 0 || lpcb->request.reserved3 != 0 ||
lpcb->request.reserved4 != 0)
return -EINVAL;
return clp_req(lpcb, CLP_LPS_PCI) ? -EOPNOTSUPP : 0;
}
static int clp_pci_command(struct clp_req *req, struct clp_req_hdr *lpcb)
{
switch (lpcb->cmd) {
case 0x0001: /* store logical-processor characteristics */
return clp_pci_slpc(req, (void *) lpcb);
case 0x0002: /* list PCI functions */
return clp_pci_list(req, (void *) lpcb);
case 0x0003: /* query PCI function */
return clp_pci_query(req, (void *) lpcb);
case 0x0004: /* query PCI function group */
return clp_pci_query_grp(req, (void *) lpcb);
default:
return -EINVAL;
}
}
static int clp_normal_command(struct clp_req *req)
{
struct clp_req_hdr *lpcb;
void __user *uptr;
int rc;
rc = -EINVAL;
if (req->lps != 0 && req->lps != 2)
goto out;
rc = -ENOMEM;
lpcb = clp_alloc_block(GFP_KERNEL);
if (!lpcb)
goto out;
rc = -EFAULT;
uptr = (void __force __user *)(unsigned long) req->data_p;
if (copy_from_user(lpcb, uptr, PAGE_SIZE) != 0)
goto out_free;
rc = -EINVAL;
if (lpcb->fmt != 0 || lpcb->reserved1 != 0 || lpcb->reserved2 != 0)
goto out_free;
switch (req->lps) {
case 0:
rc = clp_base_command(req, lpcb);
break;
case 2:
rc = clp_pci_command(req, lpcb);
break;
}
if (rc)
goto out_free;
rc = -EFAULT;
if (copy_to_user(uptr, lpcb, PAGE_SIZE) != 0)
goto out_free;
rc = 0;
out_free:
clp_free_block(lpcb);
out:
return rc;
}
static int clp_immediate_command(struct clp_req *req)
{
void __user *uptr;
unsigned long ilp;
int exists;
if (req->cmd > 1 || clp_get_ilp(&ilp) != 0)
return -EINVAL;
uptr = (void __force __user *)(unsigned long) req->data_p;
if (req->cmd == 0) {
/* Command code 0: test for a specific processor */
exists = test_bit_inv(req->lps, &ilp);
return put_user(exists, (int __user *) uptr);
}
/* Command code 1: return bit mask of installed processors */
return put_user(ilp, (unsigned long __user *) uptr);
}
static long clp_misc_ioctl(struct file *filp, unsigned int cmd,
unsigned long arg)
{
struct clp_req req;
void __user *argp;
if (cmd != CLP_SYNC)
return -EINVAL;
argp = is_compat_task() ? compat_ptr(arg) : (void __user *) arg;
if (copy_from_user(&req, argp, sizeof(req)))
return -EFAULT;
if (req.r != 0)
return -EINVAL;
return req.c ? clp_immediate_command(&req) : clp_normal_command(&req);
}
static int clp_misc_release(struct inode *inode, struct file *filp)
{
return 0;
}
static const struct file_operations clp_misc_fops = {
.owner = THIS_MODULE,
.open = nonseekable_open,
.release = clp_misc_release,
.unlocked_ioctl = clp_misc_ioctl,
.compat_ioctl = clp_misc_ioctl,
.llseek = no_llseek,
};
static struct miscdevice clp_misc_device = {
.minor = MISC_DYNAMIC_MINOR,
.name = "clp",
.fops = &clp_misc_fops,
};
static int __init clp_misc_init(void)
{
return misc_register(&clp_misc_device);
}
device_initcall(clp_misc_init);

5
arch/s390/pci/pci_debug.c
View File

@ -128,10 +128,9 @@ static const struct file_operations debugfs_pci_perf_fops = {
.release = single_release,
};
void zpci_debug_init_device(struct zpci_dev *zdev)
void zpci_debug_init_device(struct zpci_dev *zdev, const char *name)
{
zdev->debugfs_dev = debugfs_create_dir(dev_name(&zdev->pdev->dev),
debugfs_root);
zdev->debugfs_dev = debugfs_create_dir(name, debugfs_root);
if (IS_ERR(zdev->debugfs_dev))
zdev->debugfs_dev = NULL;

21
arch/s390/pci/pci_dma.c
View File

@ -217,27 +217,29 @@ void dma_cleanup_tables(unsigned long *table)
dma_free_cpu_table(table);
}
static unsigned long __dma_alloc_iommu(struct zpci_dev *zdev,
static unsigned long __dma_alloc_iommu(struct device *dev,
unsigned long start, int size)
{
struct zpci_dev *zdev = to_zpci(to_pci_dev(dev));
unsigned long boundary_size;
boundary_size = ALIGN(dma_get_seg_boundary(&zdev->pdev->dev) + 1,
boundary_size = ALIGN(dma_get_seg_boundary(dev) + 1,
PAGE_SIZE) >> PAGE_SHIFT;
return iommu_area_alloc(zdev->iommu_bitmap, zdev->iommu_pages,
start, size, 0, boundary_size, 0);
}
static unsigned long dma_alloc_iommu(struct zpci_dev *zdev, int size)
static unsigned long dma_alloc_iommu(struct device *dev, int size)
{
struct zpci_dev *zdev = to_zpci(to_pci_dev(dev));
unsigned long offset, flags;
int wrap = 0;
spin_lock_irqsave(&zdev->iommu_bitmap_lock, flags);
offset = __dma_alloc_iommu(zdev, zdev->next_bit, size);
offset = __dma_alloc_iommu(dev, zdev->next_bit, size);
if (offset == -1) {
/* wrap-around */
offset = __dma_alloc_iommu(zdev, 0, size);
offset = __dma_alloc_iommu(dev, 0, size);
wrap = 1;
}
@ -251,8 +253,9 @@ static unsigned long dma_alloc_iommu(struct zpci_dev *zdev, int size)
return offset;
}
static void dma_free_iommu(struct zpci_dev *zdev, unsigned long offset, int size)
static void dma_free_iommu(struct device *dev, unsigned long offset, int size)
{
struct zpci_dev *zdev = to_zpci(to_pci_dev(dev));
unsigned long flags;
spin_lock_irqsave(&zdev->iommu_bitmap_lock, flags);
@ -293,7 +296,7 @@ static dma_addr_t s390_dma_map_pages(struct device *dev, struct page *page,
/* This rounds up number of pages based on size and offset */
nr_pages = iommu_num_pages(pa, size, PAGE_SIZE);
iommu_page_index = dma_alloc_iommu(zdev, nr_pages);
iommu_page_index = dma_alloc_iommu(dev, nr_pages);
if (iommu_page_index == -1) {
ret = -ENOSPC;
goto out_err;
@ -319,7 +322,7 @@ static dma_addr_t s390_dma_map_pages(struct device *dev, struct page *page,
return dma_addr + (offset & ~PAGE_MASK);
out_free:
dma_free_iommu(zdev, iommu_page_index, nr_pages);
dma_free_iommu(dev, iommu_page_index, nr_pages);
out_err:
zpci_err("map error:\n");
zpci_err_dma(ret, pa);
@ -346,7 +349,7 @@ static void s390_dma_unmap_pages(struct device *dev, dma_addr_t dma_addr,
atomic64_add(npages, &zdev->unmapped_pages);
iommu_page_index = (dma_addr - zdev->start_dma) >> PAGE_SHIFT;
dma_free_iommu(zdev, iommu_page_index, npages);
dma_free_iommu(dev, iommu_page_index, npages);
}
static void *s390_dma_alloc(struct device *dev, size_t size,

13
arch/s390/pci/pci_event.c
View File

@ -46,11 +46,14 @@ struct zpci_ccdf_avail {
static void __zpci_event_error(struct zpci_ccdf_err *ccdf)
{
struct zpci_dev *zdev = get_zdev_by_fid(ccdf->fid);
struct pci_dev *pdev = zdev ? zdev->pdev : NULL;
struct pci_dev *pdev = NULL;
zpci_err("error CCDF:\n");
zpci_err_hex(ccdf, sizeof(*ccdf));
if (zdev)
pdev = pci_get_slot(zdev->bus, ZPCI_DEVFN);
pr_err("%s: Event 0x%x reports an error for PCI function 0x%x\n",
pdev ? pci_name(pdev) : "n/a", ccdf->pec, ccdf->fid);
@ -58,6 +61,7 @@ static void __zpci_event_error(struct zpci_ccdf_err *ccdf)
return;
pdev->error_state = pci_channel_io_perm_failure;
pci_dev_put(pdev);
}
void zpci_event_error(void *data)
@ -69,9 +73,12 @@ void zpci_event_error(void *data)
static void __zpci_event_availability(struct zpci_ccdf_avail *ccdf)
{
struct zpci_dev *zdev = get_zdev_by_fid(ccdf->fid);
struct pci_dev *pdev = zdev ? zdev->pdev : NULL;
struct pci_dev *pdev = NULL;
int ret;
if (zdev)
pdev = pci_get_slot(zdev->bus, ZPCI_DEVFN);
pr_info("%s: Event 0x%x reconfigured PCI function 0x%x\n",
pdev ? pci_name(pdev) : "n/a", ccdf->pec, ccdf->fid);
zpci_err("avail CCDF:\n");
@ -138,6 +145,8 @@ static void __zpci_event_availability(struct zpci_ccdf_avail *ccdf)
default:
break;
}
if (pdev)
pci_dev_put(pdev);
}
void zpci_event_availability(void *data)

8
drivers/pci/hotplug/s390_pci_hpc.c
View File

@ -93,13 +93,17 @@ out_deconfigure:
static int disable_slot(struct hotplug_slot *hotplug_slot)
{
struct slot *slot = hotplug_slot->private;
struct pci_dev *pdev;
int rc;
if (!zpci_fn_configured(slot->zdev->state))
return -EIO;
if (slot->zdev->pdev)
pci_stop_and_remove_bus_device_locked(slot->zdev->pdev);
pdev = pci_get_slot(slot->zdev->bus, ZPCI_DEVFN);
if (pdev) {
pci_stop_and_remove_bus_device_locked(pdev);
pci_dev_put(pdev);
}
rc = zpci_disable_device(slot->zdev);
if (rc)

290
drivers/s390/block/dasd_alias.c
View File

@ -185,14 +185,12 @@ static void _free_lcu(struct alias_lcu *lcu)
*/
int dasd_alias_make_device_known_to_lcu(struct dasd_device *device)
{
struct dasd_eckd_private *private;
struct dasd_eckd_private *private = device->private;
unsigned long flags;
struct alias_server *server, *newserver;
struct alias_lcu *lcu, *newlcu;
struct dasd_uid uid;
private = (struct dasd_eckd_private *) device->private;
device->discipline->get_uid(device, &uid);
spin_lock_irqsave(&aliastree.lock, flags);
server = _find_server(&uid);
@ -244,14 +242,13 @@ int dasd_alias_make_device_known_to_lcu(struct dasd_device *device)
*/
void dasd_alias_disconnect_device_from_lcu(struct dasd_device *device)
{
struct dasd_eckd_private *private;
struct dasd_eckd_private *private = device->private;
unsigned long flags;
struct alias_lcu *lcu;
struct alias_server *server;
int was_pending;
struct dasd_uid uid;
private = (struct dasd_eckd_private *) device->private;
lcu = private->lcu;
/* nothing to do if already disconnected */
if (!lcu)
@ -316,25 +313,15 @@ static int _add_device_to_lcu(struct alias_lcu *lcu,
struct dasd_device *pos)
{
struct dasd_eckd_private *private;
struct dasd_eckd_private *private = device->private;
struct alias_pav_group *group;
struct dasd_uid uid;
unsigned long flags;
private = (struct dasd_eckd_private *) device->private;
/* only lock if not already locked */
if (device != pos)
spin_lock_irqsave_nested(get_ccwdev_lock(device->cdev), flags,
CDEV_NESTED_SECOND);
private->uid.type = lcu->uac->unit[private->uid.real_unit_addr].ua_type;
private->uid.base_unit_addr =
lcu->uac->unit[private->uid.real_unit_addr].base_ua;
uid = private->uid;
if (device != pos)
spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
/* if we have no PAV anyway, we don't need to bother with PAV groups */
if (lcu->pav == NO_PAV) {
list_move(&device->alias_list, &lcu->active_devices);
@ -370,10 +357,9 @@ static int _add_device_to_lcu(struct alias_lcu *lcu,
static void _remove_device_from_lcu(struct alias_lcu *lcu,
struct dasd_device *device)
{
struct dasd_eckd_private *private;
struct dasd_eckd_private *private = device->private;
struct alias_pav_group *group;
private = (struct dasd_eckd_private *) device->private;
list_move(&device->alias_list, &lcu->inactive_devices);
group = private->pavgroup;
if (!group)
@ -411,6 +397,130 @@ suborder_not_supported(struct dasd_ccw_req *cqr)
return 0;
}
/*
* This function tries to lock all devices on an lcu via trylock
* return NULL on success otherwise return first failed device
*/
static struct dasd_device *_trylock_all_devices_on_lcu(struct alias_lcu *lcu,
struct dasd_device *pos)
{
struct alias_pav_group *pavgroup;
struct dasd_device *device;
list_for_each_entry(device, &lcu->active_devices, alias_list) {
if (device == pos)
continue;
if (!spin_trylock(get_ccwdev_lock(device->cdev)))
return device;
}
list_for_each_entry(device, &lcu->inactive_devices, alias_list) {
if (device == pos)
continue;
if (!spin_trylock(get_ccwdev_lock(device->cdev)))
return device;
}
list_for_each_entry(pavgroup, &lcu->grouplist, group) {
list_for_each_entry(device, &pavgroup->baselist, alias_list) {
if (device == pos)
continue;
if (!spin_trylock(get_ccwdev_lock(device->cdev)))
return device;
}
list_for_each_entry(device, &pavgroup->aliaslist, alias_list) {
if (device == pos)
continue;
if (!spin_trylock(get_ccwdev_lock(device->cdev)))
return device;
}
}
return NULL;
}
/*
* unlock all devices except the one that is specified as pos
* stop if enddev is specified and reached
*/
static void _unlock_all_devices_on_lcu(struct alias_lcu *lcu,
struct dasd_device *pos,
struct dasd_device *enddev)
{
struct alias_pav_group *pavgroup;
struct dasd_device *device;
list_for_each_entry(device, &lcu->active_devices, alias_list) {
if (device == pos)
continue;
if (device == enddev)
return;
spin_unlock(get_ccwdev_lock(device->cdev));
}
list_for_each_entry(device, &lcu->inactive_devices, alias_list) {
if (device == pos)
continue;
if (device == enddev)
return;
spin_unlock(get_ccwdev_lock(device->cdev));
}
list_for_each_entry(pavgroup, &lcu->grouplist, group) {
list_for_each_entry(device, &pavgroup->baselist, alias_list) {
if (device == pos)
continue;
if (device == enddev)
return;
spin_unlock(get_ccwdev_lock(device->cdev));
}
list_for_each_entry(device, &pavgroup->aliaslist, alias_list) {
if (device == pos)
continue;
if (device == enddev)
return;
spin_unlock(get_ccwdev_lock(device->cdev));
}
}
}
/*
* this function is needed because the locking order
* device lock -> lcu lock
* needs to be assured when iterating over devices in an LCU
*
* if a device is specified in pos then the device lock is already hold
*/
static void _trylock_and_lock_lcu_irqsave(struct alias_lcu *lcu,
struct dasd_device *pos,
unsigned long *flags)
{
struct dasd_device *failed;
do {
spin_lock_irqsave(&lcu->lock, *flags);
failed = _trylock_all_devices_on_lcu(lcu, pos);
if (failed) {
_unlock_all_devices_on_lcu(lcu, pos, failed);
spin_unlock_irqrestore(&lcu->lock, *flags);
cpu_relax();
}
} while (failed);
}
static void _trylock_and_lock_lcu(struct alias_lcu *lcu,
struct dasd_device *pos)
{
struct dasd_device *failed;
do {
spin_lock(&lcu->lock);
failed = _trylock_all_devices_on_lcu(lcu, pos);
if (failed) {
_unlock_all_devices_on_lcu(lcu, pos, failed);
spin_unlock(&lcu->lock);
cpu_relax();
}
} while (failed);
}
static int read_unit_address_configuration(struct dasd_device *device,
struct alias_lcu *lcu)
{
@ -487,13 +597,13 @@ static int _lcu_update(struct dasd_device *refdev, struct alias_lcu *lcu)
list_for_each_entry_safe(device, tempdev, &pavgroup->baselist,
alias_list) {
list_move(&device->alias_list, &lcu->active_devices);
private = (struct dasd_eckd_private *) device->private;
private = device->private;
private->pavgroup = NULL;
}
list_for_each_entry_safe(device, tempdev, &pavgroup->aliaslist,
alias_list) {
list_move(&device->alias_list, &lcu->active_devices);
private = (struct dasd_eckd_private *) device->private;
private = device->private;
private->pavgroup = NULL;
}
list_del(&pavgroup->group);
@ -505,10 +615,7 @@ static int _lcu_update(struct dasd_device *refdev, struct alias_lcu *lcu)
if (rc)
return rc;
/* need to take cdev lock before lcu lock */
spin_lock_irqsave_nested(get_ccwdev_lock(refdev->cdev), flags,
CDEV_NESTED_FIRST);
spin_lock(&lcu->lock);
_trylock_and_lock_lcu_irqsave(lcu, NULL, &flags);
lcu->pav = NO_PAV;
for (i = 0; i < MAX_DEVICES_PER_LCU; ++i) {
switch (lcu->uac->unit[i].ua_type) {
@ -527,8 +634,8 @@ static int _lcu_update(struct dasd_device *refdev, struct alias_lcu *lcu)
alias_list) {
_add_device_to_lcu(lcu, device, refdev);
}
spin_unlock(&lcu->lock);
spin_unlock_irqrestore(get_ccwdev_lock(refdev->cdev), flags);
_unlock_all_devices_on_lcu(lcu, NULL, NULL);
spin_unlock_irqrestore(&lcu->lock, flags);
return 0;
}
@ -608,16 +715,13 @@ static int _schedule_lcu_update(struct alias_lcu *lcu,
int dasd_alias_add_device(struct dasd_device *device)
{
struct dasd_eckd_private *private;
struct dasd_eckd_private *private = device->private;
struct alias_lcu *lcu;
unsigned long flags;
int rc;
private = (struct dasd_eckd_private *) device->private;
lcu = private->lcu;
rc = 0;
/* need to take cdev lock before lcu lock */
spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
spin_lock(&lcu->lock);
if (!(lcu->flags & UPDATE_PENDING)) {
@ -636,20 +740,18 @@ int dasd_alias_add_device(struct dasd_device *device)
int dasd_alias_update_add_device(struct dasd_device *device)
{
struct dasd_eckd_private *private;
private = (struct dasd_eckd_private *) device->private;
struct dasd_eckd_private *private = device->private;
private->lcu->flags |= UPDATE_PENDING;
return dasd_alias_add_device(device);
}
int dasd_alias_remove_device(struct dasd_device *device)
{
struct dasd_eckd_private *private;
struct alias_lcu *lcu;
struct dasd_eckd_private *private = device->private;
struct alias_lcu *lcu = private->lcu;
unsigned long flags;
private = (struct dasd_eckd_private *) device->private;
lcu = private->lcu;
/* nothing to do if already removed */
if (!lcu)
return 0;
@ -661,16 +763,12 @@ int dasd_alias_remove_device(struct dasd_device *device)
struct dasd_device *dasd_alias_get_start_dev(struct dasd_device *base_device)
{
struct dasd_eckd_private *alias_priv, *private = base_device->private;
struct alias_pav_group *group = private->pavgroup;
struct alias_lcu *lcu = private->lcu;
struct dasd_device *alias_device;
struct alias_pav_group *group;
struct alias_lcu *lcu;
struct dasd_eckd_private *private, *alias_priv;
unsigned long flags;
private = (struct dasd_eckd_private *) base_device->private;
group = private->pavgroup;
lcu = private->lcu;
if (!group || !lcu)
return NULL;
if (lcu->pav == NO_PAV ||
@ -706,7 +804,7 @@ struct dasd_device *dasd_alias_get_start_dev(struct dasd_device *base_device)
group->next = list_first_entry(&alias_device->alias_list,
struct dasd_device, alias_list);
spin_unlock_irqrestore(&lcu->lock, flags);
alias_priv = (struct dasd_eckd_private *) alias_device->private;
alias_priv = alias_device->private;
if ((alias_priv->count < private->count) && !alias_device->stopped &&
!test_bit(DASD_FLAG_OFFLINE, &alias_device->flags))
return alias_device;
@ -754,30 +852,19 @@ static void _restart_all_base_devices_on_lcu(struct alias_lcu *lcu)
struct alias_pav_group *pavgroup;
struct dasd_device *device;
struct dasd_eckd_private *private;
unsigned long flags;
/* active and inactive list can contain alias as well as base devices */
list_for_each_entry(device, &lcu->active_devices, alias_list) {
private = (struct dasd_eckd_private *) device->private;
spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
if (private->uid.type != UA_BASE_DEVICE) {
spin_unlock_irqrestore(get_ccwdev_lock(device->cdev),
flags);
private = device->private;
if (private->uid.type != UA_BASE_DEVICE)
continue;
}
spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
dasd_schedule_block_bh(device->block);
dasd_schedule_device_bh(device);
}
list_for_each_entry(device, &lcu->inactive_devices, alias_list) {
private = (struct dasd_eckd_private *) device->private;
spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
if (private->uid.type != UA_BASE_DEVICE) {
spin_unlock_irqrestore(get_ccwdev_lock(device->cdev),
flags);
private = device->private;
if (private->uid.type != UA_BASE_DEVICE)
continue;
}
spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
dasd_schedule_block_bh(device->block);
dasd_schedule_device_bh(device);
}
@ -812,7 +899,7 @@ static void flush_all_alias_devices_on_lcu(struct alias_lcu *lcu)
spin_lock_irqsave(&lcu->lock, flags);
list_for_each_entry_safe(device, temp, &lcu->active_devices,
alias_list) {
private = (struct dasd_eckd_private *) device->private;
private = device->private;
if (private->uid.type == UA_BASE_DEVICE)
continue;
list_move(&device->alias_list, &active);
@ -834,45 +921,27 @@ static void flush_all_alias_devices_on_lcu(struct alias_lcu *lcu)
if (device == list_first_entry(&active,
struct dasd_device, alias_list)) {
list_move(&device->alias_list, &lcu->active_devices);
private = (struct dasd_eckd_private *) device->private;
private = device->private;
private->pavgroup = NULL;
}
}
spin_unlock_irqrestore(&lcu->lock, flags);
}
static void __stop_device_on_lcu(struct dasd_device *device,
struct dasd_device *pos)
{
/* If pos == device then device is already locked! */
if (pos == device) {
dasd_device_set_stop_bits(pos, DASD_STOPPED_SU);
return;
}
spin_lock(get_ccwdev_lock(pos->cdev));
dasd_device_set_stop_bits(pos, DASD_STOPPED_SU);
spin_unlock(get_ccwdev_lock(pos->cdev));
}
/*
* This function is called in interrupt context, so the
* cdev lock for device is already locked!
*/
static void _stop_all_devices_on_lcu(struct alias_lcu *lcu,
struct dasd_device *device)
static void _stop_all_devices_on_lcu(struct alias_lcu *lcu)
{
struct alias_pav_group *pavgroup;
struct dasd_device *pos;
struct dasd_device *device;
list_for_each_entry(pos, &lcu->active_devices, alias_list)
__stop_device_on_lcu(device, pos);
list_for_each_entry(pos, &lcu->inactive_devices, alias_list)
__stop_device_on_lcu(device, pos);
list_for_each_entry(device, &lcu->active_devices, alias_list)
dasd_device_set_stop_bits(device, DASD_STOPPED_SU);
list_for_each_entry(device, &lcu->inactive_devices, alias_list)
dasd_device_set_stop_bits(device, DASD_STOPPED_SU);
list_for_each_entry(pavgroup, &lcu->grouplist, group) {
list_for_each_entry(pos, &pavgroup->baselist, alias_list)
__stop_device_on_lcu(device, pos);
list_for_each_entry(pos, &pavgroup->aliaslist, alias_list)
__stop_device_on_lcu(device, pos);
list_for_each_entry(device, &pavgroup->baselist, alias_list)
dasd_device_set_stop_bits(device, DASD_STOPPED_SU);
list_for_each_entry(device, &pavgroup->aliaslist, alias_list)
dasd_device_set_stop_bits(device, DASD_STOPPED_SU);
}
}
@ -880,33 +949,16 @@ static void _unstop_all_devices_on_lcu(struct alias_lcu *lcu)
{
struct alias_pav_group *pavgroup;
struct dasd_device *device;
unsigned long flags;
list_for_each_entry(device, &lcu->active_devices, alias_list) {
spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
list_for_each_entry(device, &lcu->active_devices, alias_list)
dasd_device_remove_stop_bits(device, DASD_STOPPED_SU);
spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
}
list_for_each_entry(device, &lcu->inactive_devices, alias_list) {
spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
list_for_each_entry(device, &lcu->inactive_devices, alias_list)
dasd_device_remove_stop_bits(device, DASD_STOPPED_SU);
spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
}
list_for_each_entry(pavgroup, &lcu->grouplist, group) {
list_for_each_entry(device, &pavgroup->baselist, alias_list) {
spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
list_for_each_entry(device, &pavgroup->baselist, alias_list)
dasd_device_remove_stop_bits(device, DASD_STOPPED_SU);
spin_unlock_irqrestore(get_ccwdev_lock(device->cdev),
flags);
}
list_for_each_entry(device, &pavgroup->aliaslist, alias_list) {
spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
list_for_each_entry(device, &pavgroup->aliaslist, alias_list)
dasd_device_remove_stop_bits(device, DASD_STOPPED_SU);
spin_unlock_irqrestore(get_ccwdev_lock(device->cdev),
flags);
}
}
}
@ -932,13 +984,14 @@ static void summary_unit_check_handling_work(struct work_struct *work)
spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
reset_summary_unit_check(lcu, device, suc_data->reason);
spin_lock_irqsave(&lcu->lock, flags);
_trylock_and_lock_lcu_irqsave(lcu, NULL, &flags);
_unstop_all_devices_on_lcu(lcu);
_restart_all_base_devices_on_lcu(lcu);
/* 3. read new alias configuration */
_schedule_lcu_update(lcu, device);
lcu->suc_data.device = NULL;
dasd_put_device(device);
_unlock_all_devices_on_lcu(lcu, NULL, NULL);
spin_unlock_irqrestore(&lcu->lock, flags);
}
@ -948,13 +1001,11 @@ static void summary_unit_check_handling_work(struct work_struct *work)
void dasd_alias_handle_summary_unit_check(struct dasd_device *device,
struct irb *irb)
{
struct dasd_eckd_private *private = device->private;
struct alias_lcu *lcu;
char reason;
struct dasd_eckd_private *private;
char *sense;
private = (struct dasd_eckd_private *) device->private;
sense = dasd_get_sense(irb);
if (sense) {
reason = sense[8];
@ -974,10 +1025,7 @@ void dasd_alias_handle_summary_unit_check(struct dasd_device *device,
" unit check (no lcu structure)");
return;
}
spin_lock(&lcu->lock);
_stop_all_devices_on_lcu(lcu, device);
/* prepare for lcu_update */
private->lcu->flags |= NEED_UAC_UPDATE | UPDATE_PENDING;
_trylock_and_lock_lcu(lcu, device);
/* If this device is about to be removed just return and wait for
* the next interrupt on a different device
*/
@ -985,6 +1033,7 @@ void dasd_alias_handle_summary_unit_check(struct dasd_device *device,
DBF_DEV_EVENT(DBF_WARNING, device, "%s",
"device is in offline processing,"
" don't do summary unit check handling");
_unlock_all_devices_on_lcu(lcu, device, NULL);
spin_unlock(&lcu->lock);
return;
}
@ -993,12 +1042,17 @@ void dasd_alias_handle_summary_unit_check(struct dasd_device *device,
DBF_DEV_EVENT(DBF_WARNING, device, "%s",
"previous instance of summary unit check worker"
" still pending");
_unlock_all_devices_on_lcu(lcu, device, NULL);
spin_unlock(&lcu->lock);
return ;
}
_stop_all_devices_on_lcu(lcu);
/* prepare for lcu_update */
private->lcu->flags |= NEED_UAC_UPDATE | UPDATE_PENDING;
lcu->suc_data.reason = reason;
lcu->suc_data.device = device;
dasd_get_device(device);
_unlock_all_devices_on_lcu(lcu, device, NULL);
spin_unlock(&lcu->lock);
if (!schedule_work(&lcu->suc_data.worker))
dasd_put_device(device);

10
drivers/s390/block/dasd_devmap.c
View File

@ -214,8 +214,8 @@ dasd_feature_list(char *str, char **endp)
else if (len == 8 && !strncmp(str, "failfast", 8))
features |= DASD_FEATURE_FAILFAST;
else {
pr_warning("%*s is not a supported device option\n",
len, str);
pr_warn("%*s is not a supported device option\n",
len, str);
rc = -EINVAL;
}
str += len;
@ -224,8 +224,7 @@ dasd_feature_list(char *str, char **endp)
str++;
}
if (*str != ')') {
pr_warning("A closing parenthesis ')' is missing in the "
"dasd= parameter\n");
pr_warn("A closing parenthesis ')' is missing in the dasd= parameter\n");
rc = -EINVAL;
} else
str++;
@ -348,8 +347,7 @@ dasd_parse_range( char *parsestring ) {
return str + 1;
if (*str == '\0')
return str;
pr_warning("The dasd= parameter value %s has an invalid ending\n",
str);
pr_warn("The dasd= parameter value %s has an invalid ending\n", str);
return ERR_PTR(-EINVAL);
}

69
drivers/s390/block/dasd_diag.c
View File

@ -104,12 +104,10 @@ static inline int
mdsk_init_io(struct dasd_device *device, unsigned int blocksize,
blocknum_t offset, blocknum_t *end_block)
{
struct dasd_diag_private *private;
struct dasd_diag_init_io *iib;
struct dasd_diag_private *private = device->private;
struct dasd_diag_init_io *iib = &private->iib;
int rc;
private = (struct dasd_diag_private *) device->private;
iib = &private->iib;
memset(iib, 0, sizeof (struct dasd_diag_init_io));
iib->dev_nr = private->dev_id.devno;
@ -130,12 +128,10 @@ mdsk_init_io(struct dasd_device *device, unsigned int blocksize,
static inline int
mdsk_term_io(struct dasd_device * device)
{
struct dasd_diag_private *private;
struct dasd_diag_init_io *iib;
struct dasd_diag_private *private = device->private;
struct dasd_diag_init_io *iib = &private->iib;
int rc;
private = (struct dasd_diag_private *) device->private;
iib = &private->iib;
memset(iib, 0, sizeof (struct dasd_diag_init_io));
iib->dev_nr = private->dev_id.devno;
rc = dia250(iib, TERM_BIO);
@ -153,14 +149,13 @@ dasd_diag_erp(struct dasd_device *device)
rc = mdsk_init_io(device, device->block->bp_block, 0, NULL);
if (rc == 4) {
if (!(test_and_set_bit(DASD_FLAG_DEVICE_RO, &device->flags)))
pr_warning("%s: The access mode of a DIAG device "
"changed to read-only\n",
dev_name(&device->cdev->dev));
pr_warn("%s: The access mode of a DIAG device changed to read-only\n",
dev_name(&device->cdev->dev));
rc = 0;
}
if (rc)
pr_warning("%s: DIAG ERP failed with "
"rc=%d\n", dev_name(&device->cdev->dev), rc);
pr_warn("%s: DIAG ERP failed with rc=%d\n",
dev_name(&device->cdev->dev), rc);
}
/* Start a given request at the device. Return zero on success, non-zero
@ -180,8 +175,8 @@ dasd_start_diag(struct dasd_ccw_req * cqr)
cqr->status = DASD_CQR_ERROR;
return -EIO;
}
private = (struct dasd_diag_private *) device->private;
dreq = (struct dasd_diag_req *) cqr->data;
private = device->private;
dreq = cqr->data;
private->iob.dev_nr = private->dev_id.devno;
private->iob.key = 0;
@ -320,18 +315,17 @@ static void dasd_ext_handler(struct ext_code ext_code,
static int
dasd_diag_check_device(struct dasd_device *device)
{
struct dasd_block *block;
struct dasd_diag_private *private;
struct dasd_diag_private *private = device->private;
struct dasd_diag_characteristics *rdc_data;
struct dasd_diag_bio bio;
struct vtoc_cms_label *label;
blocknum_t end_block;
struct dasd_block *block;
struct dasd_diag_bio bio;
unsigned int sb, bsize;
blocknum_t end_block;
int rc;
private = (struct dasd_diag_private *) device->private;
if (private == NULL) {
private = kzalloc(sizeof(struct dasd_diag_private),GFP_KERNEL);
private = kzalloc(sizeof(*private), GFP_KERNEL);
if (private == NULL) {
DBF_DEV_EVENT(DBF_WARNING, device, "%s",
"Allocating memory for private DASD data "
@ -339,7 +333,7 @@ dasd_diag_check_device(struct dasd_device *device)
return -ENOMEM;
}
ccw_device_get_id(device->cdev, &private->dev_id);
device->private = (void *) private;
device->private = private;
}
block = dasd_alloc_block();
if (IS_ERR(block)) {
@ -353,7 +347,7 @@ dasd_diag_check_device(struct dasd_device *device)
block->base = device;
/* Read Device Characteristics */
rdc_data = (void *) &(private->rdc_data);
rdc_data = &private->rdc_data;
rdc_data->dev_nr = private->dev_id.devno;
rdc_data->rdc_len = sizeof (struct dasd_diag_characteristics);
@ -377,9 +371,9 @@ dasd_diag_check_device(struct dasd_device *device)
private->pt_block = 2;
break;
default:
pr_warning("%s: Device type %d is not supported "
"in DIAG mode\n", dev_name(&device->cdev->dev),
private->rdc_data.vdev_class);
pr_warn("%s: Device type %d is not supported in DIAG mode\n",
dev_name(&device->cdev->dev),
private->rdc_data.vdev_class);
rc = -EOPNOTSUPP;
goto out;
}
@ -420,8 +414,8 @@ dasd_diag_check_device(struct dasd_device *device)
private->iob.flaga = DASD_DIAG_FLAGA_DEFAULT;
rc = dia250(&private->iob, RW_BIO);
if (rc == 3) {
pr_warning("%s: A 64-bit DIAG call failed\n",
dev_name(&device->cdev->dev));
pr_warn("%s: A 64-bit DIAG call failed\n",
dev_name(&device->cdev->dev));
rc = -EOPNOTSUPP;
goto out_label;
}
@ -430,9 +424,8 @@ dasd_diag_check_device(struct dasd_device *device)
break;
}
if (bsize > PAGE_SIZE) {
pr_warning("%s: Accessing the DASD failed because of an "
"incorrect format (rc=%d)\n",
dev_name(&device->cdev->dev), rc);
pr_warn("%s: Accessing the DASD failed because of an incorrect format (rc=%d)\n",
dev_name(&device->cdev->dev), rc);
rc = -EIO;
goto out_label;
}
@ -450,8 +443,8 @@ dasd_diag_check_device(struct dasd_device *device)
block->s2b_shift++;
rc = mdsk_init_io(device, block->bp_block, 0, NULL);
if (rc && (rc != 4)) {
pr_warning("%s: DIAG initialization failed with rc=%d\n",
dev_name(&device->cdev->dev), rc);
pr_warn("%s: DIAG initialization failed with rc=%d\n",
dev_name(&device->cdev->dev), rc);
rc = -EIO;
} else {
if (rc == 4)
@ -601,16 +594,14 @@ static int
dasd_diag_fill_info(struct dasd_device * device,
struct dasd_information2_t * info)
{
struct dasd_diag_private *private;
struct dasd_diag_private *private = device->private;
private = (struct dasd_diag_private *) device->private;
info->label_block = (unsigned int) private->pt_block;
info->FBA_layout = 1;
info->format = DASD_FORMAT_LDL;
info->characteristics_size = sizeof (struct dasd_diag_characteristics);
memcpy(info->characteristics,
&((struct dasd_diag_private *) device->private)->rdc_data,
sizeof (struct dasd_diag_characteristics));
info->characteristics_size = sizeof(private->rdc_data);
memcpy(info->characteristics, &private->rdc_data,
sizeof(private->rdc_data));
info->confdata_size = 0;
return 0;
}

311
drivers/s390/block/dasd_eckd.c
View File

@ -212,10 +212,9 @@ check_XRC (struct ccw1 *de_ccw,
struct DE_eckd_data *data,
struct dasd_device *device)
{
struct dasd_eckd_private *private;
struct dasd_eckd_private *private = device->private;
int rc;
private = (struct dasd_eckd_private *) device->private;
if (!private->rdc_data.facilities.XRC_supported)
return 0;
@ -237,13 +236,11 @@ static int
define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk,
unsigned int totrk, int cmd, struct dasd_device *device)
{
struct dasd_eckd_private *private;
struct dasd_eckd_private *private = device->private;
u32 begcyl, endcyl;
u16 heads, beghead, endhead;
int rc = 0;
private = (struct dasd_eckd_private *) device->private;
ccw->cmd_code = DASD_ECKD_CCW_DEFINE_EXTENT;
ccw->flags = 0;
ccw->count = 16;
@ -322,10 +319,9 @@ define_extent(struct ccw1 *ccw, struct DE_eckd_data *data, unsigned int trk,
static int check_XRC_on_prefix(struct PFX_eckd_data *pfxdata,
struct dasd_device *device)
{
struct dasd_eckd_private *private;
struct dasd_eckd_private *private = device->private;
int rc;
private = (struct dasd_eckd_private *) device->private;
if (!private->rdc_data.facilities.XRC_supported)
return 0;
@ -346,12 +342,10 @@ static void fill_LRE_data(struct LRE_eckd_data *data, unsigned int trk,
struct dasd_device *device, unsigned int reclen,
unsigned int tlf)
{
struct dasd_eckd_private *private;
struct dasd_eckd_private *private = device->private;
int sector;
int dn, d;
private = (struct dasd_eckd_private *) device->private;
memset(data, 0, sizeof(*data));
sector = 0;
if (rec_on_trk) {
@ -488,8 +482,8 @@ static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
u16 heads, beghead, endhead;
int rc = 0;
basepriv = (struct dasd_eckd_private *) basedev->private;
startpriv = (struct dasd_eckd_private *) startdev->private;
basepriv = basedev->private;
startpriv = startdev->private;
dedata = &pfxdata->define_extent;
lredata = &pfxdata->locate_record;
@ -631,12 +625,10 @@ locate_record(struct ccw1 *ccw, struct LO_eckd_data *data, unsigned int trk,
unsigned int rec_on_trk, int no_rec, int cmd,
struct dasd_device * device, int reclen)
{
struct dasd_eckd_private *private;
struct dasd_eckd_private *private = device->private;
int sector;
int dn, d;
private = (struct dasd_eckd_private *) device->private;
DBF_DEV_EVENT(DBF_INFO, device,
"Locate: trk %d, rec %d, no_rec %d, cmd %d, reclen %d",
trk, rec_on_trk, no_rec, cmd, reclen);
@ -800,10 +792,9 @@ static void create_uid(struct dasd_eckd_private *private)
*/
static int dasd_eckd_generate_uid(struct dasd_device *device)
{
struct dasd_eckd_private *private;
struct dasd_eckd_private *private = device->private;
unsigned long flags;
private = (struct dasd_eckd_private *) device->private;
if (!private)
return -ENODEV;
if (!private->ned || !private->gneq)
@ -816,11 +807,10 @@ static int dasd_eckd_generate_uid(struct dasd_device *device)
static int dasd_eckd_get_uid(struct dasd_device *device, struct dasd_uid *uid)
{
struct dasd_eckd_private *private;
struct dasd_eckd_private *private = device->private;
unsigned long flags;
if (device->private) {
private = (struct dasd_eckd_private *)device->private;
if (private) {
spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
*uid = private->uid;
spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
@ -1034,10 +1024,9 @@ static unsigned char dasd_eckd_path_access(void *conf_data, int conf_len)
static void dasd_eckd_clear_conf_data(struct dasd_device *device)
{
struct dasd_eckd_private *private;
struct dasd_eckd_private *private = device->private;
int i;
private = (struct dasd_eckd_private *) device->private;
private->conf_data = NULL;
private->conf_len = 0;
for (i = 0; i < 8; i++) {
@ -1058,7 +1047,7 @@ static int dasd_eckd_read_conf(struct dasd_device *device)
struct dasd_uid *uid;
char print_path_uid[60], print_device_uid[60];
private = (struct dasd_eckd_private *) device->private;
private = device->private;
path_data = &device->path_data;
opm = ccw_device_get_path_mask(device->cdev);
conf_data_saved = 0;
@ -1191,11 +1180,10 @@ static int dasd_eckd_read_conf(struct dasd_device *device)
static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm)
{
struct dasd_eckd_private *private;
struct dasd_eckd_private *private = device->private;
int mdc;
u32 fcx_max_data;
private = (struct dasd_eckd_private *) device->private;
if (private->fcx_max_data) {
mdc = ccw_device_get_mdc(device->cdev, lpm);
if ((mdc < 0)) {
@ -1221,15 +1209,10 @@ static int verify_fcx_max_data(struct dasd_device *device, __u8 lpm)
static int rebuild_device_uid(struct dasd_device *device,
struct path_verification_work_data *data)
{
struct dasd_eckd_private *private;
struct dasd_path *path_data;
__u8 lpm, opm;
int rc;
rc = -ENODEV;
private = (struct dasd_eckd_private *) device->private;
path_data = &device->path_data;
opm = device->path_data.opm;
struct dasd_eckd_private *private = device->private;
struct dasd_path *path_data = &device->path_data;
__u8 lpm, opm = path_data->opm;
int rc = -ENODEV;
for (lpm = 0x80; lpm; lpm >>= 1) {
if (!(lpm & opm))
@ -1463,14 +1446,13 @@ static int dasd_eckd_verify_path(struct dasd_device *device, __u8 lpm)
static int dasd_eckd_read_features(struct dasd_device *device)
{
struct dasd_eckd_private *private = device->private;
struct dasd_psf_prssd_data *prssdp;
struct dasd_rssd_features *features;
struct dasd_ccw_req *cqr;
struct ccw1 *ccw;
int rc;
struct dasd_eckd_private *private;
private = (struct dasd_eckd_private *) device->private;
memset(&private->features, 0, sizeof(struct dasd_rssd_features));
cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
(sizeof(struct dasd_psf_prssd_data) +
@ -1605,11 +1587,9 @@ dasd_eckd_psf_ssc(struct dasd_device *device, int enable_pav,
static int dasd_eckd_validate_server(struct dasd_device *device,
unsigned long flags)
{
int rc;
struct dasd_eckd_private *private;
int enable_pav;
struct dasd_eckd_private *private = device->private;
int enable_pav, rc;
private = (struct dasd_eckd_private *) device->private;
if (private->uid.type == UA_BASE_PAV_ALIAS ||
private->uid.type == UA_HYPER_PAV_ALIAS)
return 0;
@ -1662,14 +1642,13 @@ static void dasd_eckd_kick_validate_server(struct dasd_device *device)
static u32 get_fcx_max_data(struct dasd_device *device)
{
int tpm, mdc;
struct dasd_eckd_private *private = device->private;
int fcx_in_css, fcx_in_gneq, fcx_in_features;
struct dasd_eckd_private *private;
int tpm, mdc;
if (dasd_nofcx)
return 0;
/* is transport mode supported? */
private = (struct dasd_eckd_private *) device->private;
fcx_in_css = css_general_characteristics.fcx;
fcx_in_gneq = private->gneq->reserved2[7] & 0x04;
fcx_in_features = private->features.feature[40] & 0x80;
@ -1694,7 +1673,7 @@ static u32 get_fcx_max_data(struct dasd_device *device)
static int
dasd_eckd_check_characteristics(struct dasd_device *device)
{
struct dasd_eckd_private *private;
struct dasd_eckd_private *private = device->private;
struct dasd_block *block;
struct dasd_uid temp_uid;
int rc, i;
@ -1713,7 +1692,6 @@ dasd_eckd_check_characteristics(struct dasd_device *device)
dev_info(&device->cdev->dev,
"The DASD is not operating in multipath mode\n");
}
private = (struct dasd_eckd_private *) device->private;
if (!private) {
private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA);
if (!private) {
@ -1722,7 +1700,7 @@ dasd_eckd_check_characteristics(struct dasd_device *device)
"failed\n");
return -ENOMEM;
}
device->private = (void *) private;
device->private = private;
} else {
memset(private, 0, sizeof(*private));
}
@ -1837,10 +1815,9 @@ out_err1:
static void dasd_eckd_uncheck_device(struct dasd_device *device)
{
struct dasd_eckd_private *private;
struct dasd_eckd_private *private = device->private;
int i;
private = (struct dasd_eckd_private *) device->private;
dasd_alias_disconnect_device_from_lcu(device);
private->ned = NULL;
private->sneq = NULL;
@ -1863,7 +1840,7 @@ static void dasd_eckd_uncheck_device(struct dasd_device *device)
static struct dasd_ccw_req *
dasd_eckd_analysis_ccw(struct dasd_device *device)
{
struct dasd_eckd_private *private;
struct dasd_eckd_private *private = device->private;
struct eckd_count *count_data;
struct LO_eckd_data *LO_data;
struct dasd_ccw_req *cqr;
@ -1871,8 +1848,6 @@ dasd_eckd_analysis_ccw(struct dasd_device *device)
int cplength, datasize;
int i;
private = (struct dasd_eckd_private *) device->private;
cplength = 8;
datasize = sizeof(struct DE_eckd_data) + 2*sizeof(struct LO_eckd_data);
cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize, device);
@ -1946,11 +1921,9 @@ static int dasd_eckd_analysis_evaluation(struct dasd_ccw_req *init_cqr)
static void dasd_eckd_analysis_callback(struct dasd_ccw_req *init_cqr,
void *data)
{
struct dasd_eckd_private *private;
struct dasd_device *device;
struct dasd_device *device = init_cqr->startdev;
struct dasd_eckd_private *private = device->private;
device = init_cqr->startdev;
private = (struct dasd_eckd_private *) device->private;
private->init_cqr_status = dasd_eckd_analysis_evaluation(init_cqr);
dasd_sfree_request(init_cqr, device);
dasd_kick_device(device);
@ -1977,15 +1950,13 @@ static int dasd_eckd_start_analysis(struct dasd_block *block)
static int dasd_eckd_end_analysis(struct dasd_block *block)
{
struct dasd_device *device;
struct dasd_eckd_private *private;
struct dasd_device *device = block->base;
struct dasd_eckd_private *private = device->private;
struct eckd_count *count_area;
unsigned int sb, blk_per_trk;
int status, i;
struct dasd_ccw_req *init_cqr;
device = block->base;
private = (struct dasd_eckd_private *) device->private;
status = private->init_cqr_status;
private->init_cqr_status = -1;
if (status == INIT_CQR_ERROR) {
@ -2083,9 +2054,8 @@ raw:
static int dasd_eckd_do_analysis(struct dasd_block *block)
{
struct dasd_eckd_private *private;
struct dasd_eckd_private *private = block->base->private;
private = (struct dasd_eckd_private *) block->base->private;
if (private->init_cqr_status < 0)
return dasd_eckd_start_analysis(block);
else
@ -2112,9 +2082,8 @@ static int dasd_eckd_basic_to_known(struct dasd_device *device)
static int
dasd_eckd_fill_geometry(struct dasd_block *block, struct hd_geometry *geo)
{
struct dasd_eckd_private *private;
struct dasd_eckd_private *private = block->base->private;
private = (struct dasd_eckd_private *) block->base->private;
if (dasd_check_blocksize(block->bp_block) == 0) {
geo->sectors = recs_per_track(&private->rdc_data,
0, block->bp_block);
@ -2151,8 +2120,8 @@ dasd_eckd_build_format(struct dasd_device *base,
if (!startdev)
startdev = base;
start_priv = (struct dasd_eckd_private *) startdev->private;
base_priv = (struct dasd_eckd_private *) base->private;
start_priv = startdev->private;
base_priv = base->private;
rpt = recs_per_track(&base_priv->rdc_data, 0, fdata->blksize);
@ -2349,14 +2318,14 @@ dasd_eckd_build_format(struct dasd_device *base,
* when formatting CDL
*/
if ((intensity & 0x08) &&
fdata->start_unit == 0) {
address.cyl == 0 && address.head == 0) {
if (i < 3) {
ect->kl = 4;
ect->dl = sizes_trk0[i] - 4;
}
}
if ((intensity & 0x08) &&
fdata->start_unit == 1) {
address.cyl == 0 && address.head == 1) {
ect->kl = 44;
ect->dl = LABEL_SIZE - 44;
}
@ -2386,23 +2355,24 @@ dasd_eckd_build_format(struct dasd_device *base,
return fcp;
}
static int
dasd_eckd_format_device(struct dasd_device *base,
struct format_data_t *fdata,
int enable_pav)
/*
* Wrapper function to build a CCW request depending on input data
*/
static struct dasd_ccw_req *
dasd_eckd_format_build_ccw_req(struct dasd_device *base,
struct format_data_t *fdata, int enable_pav)
{
struct dasd_ccw_req *cqr, *n;
struct dasd_block *block;
struct dasd_eckd_private *private;
struct list_head format_queue;
struct dasd_device *device;
int old_stop, format_step;
int step, rc = 0, sleep_rc;
return dasd_eckd_build_format(base, fdata, enable_pav);
}
block = base->block;
private = (struct dasd_eckd_private *) base->private;
/*
* Sanity checks on format_data
*/
static int dasd_eckd_format_sanity_checks(struct dasd_device *base,
struct format_data_t *fdata)
{
struct dasd_eckd_private *private = base->private;
/* Sanity checks. */
if (fdata->start_unit >=
(private->real_cyl * private->rdc_data.trk_per_cyl)) {
dev_warn(&base->cdev->dev,
@ -2429,75 +2399,98 @@ dasd_eckd_format_device(struct dasd_device *base,
fdata->blksize);
return -EINVAL;
}
return 0;
}
/*
* This function will process format_data originally coming from an IOCTL
*/
static int dasd_eckd_format_process_data(struct dasd_device *base,
struct format_data_t *fdata,
int enable_pav)
{
struct dasd_eckd_private *private = base->private;
struct dasd_ccw_req *cqr, *n;
struct list_head format_queue;
struct dasd_device *device;
int old_start, old_stop, format_step;
int step, retry;
int rc;
rc = dasd_eckd_format_sanity_checks(base, fdata);
if (rc)
return rc;
INIT_LIST_HEAD(&format_queue);
old_start = fdata->start_unit;
old_stop = fdata->stop_unit;
while (fdata->start_unit <= 1) {
fdata->stop_unit = fdata->start_unit;
cqr = dasd_eckd_build_format(base, fdata, enable_pav);
list_add(&cqr->blocklist, &format_queue);
fdata->stop_unit = old_stop;
fdata->start_unit++;
format_step = DASD_CQR_MAX_CCW / recs_per_track(&private->rdc_data, 0,
fdata->blksize);
do {
retry = 0;
while (fdata->start_unit <= old_stop) {
step = fdata->stop_unit - fdata->start_unit + 1;
if (step > format_step) {
fdata->stop_unit =
fdata->start_unit + format_step - 1;
}
if (fdata->start_unit > fdata->stop_unit)
goto sleep;
}
cqr = dasd_eckd_format_build_ccw_req(base, fdata,
enable_pav);
if (IS_ERR(cqr)) {
rc = PTR_ERR(cqr);
if (rc == -ENOMEM) {
if (list_empty(&format_queue))
goto out;
/*
* not enough memory available, start
* requests retry after first requests
* were finished
*/
retry = 1;
break;
}
goto out_err;
}
list_add_tail(&cqr->blocklist, &format_queue);
retry:
format_step = 255 / recs_per_track(&private->rdc_data, 0,
fdata->blksize);
while (fdata->start_unit <= old_stop) {
step = fdata->stop_unit - fdata->start_unit + 1;
if (step > format_step)
fdata->stop_unit = fdata->start_unit + format_step - 1;
cqr = dasd_eckd_build_format(base, fdata, enable_pav);
if (IS_ERR(cqr)) {
if (PTR_ERR(cqr) == -ENOMEM) {
/*
* not enough memory available
* go to out and start requests
* retry after first requests were finished
*/
fdata->stop_unit = old_stop;
goto sleep;
} else
return PTR_ERR(cqr);
fdata->start_unit = fdata->stop_unit + 1;
fdata->stop_unit = old_stop;
}
list_add(&cqr->blocklist, &format_queue);
fdata->start_unit = fdata->stop_unit + 1;
fdata->stop_unit = old_stop;
}
rc = dasd_sleep_on_queue(&format_queue);
sleep:
sleep_rc = dasd_sleep_on_queue(&format_queue);
out_err:
list_for_each_entry_safe(cqr, n, &format_queue, blocklist) {
device = cqr->startdev;
private = device->private;
if (cqr->status == DASD_CQR_FAILED)
rc = -EIO;
list_del_init(&cqr->blocklist);
dasd_sfree_request(cqr, device);
private->count--;
}
list_for_each_entry_safe(cqr, n, &format_queue, blocklist) {
device = cqr->startdev;
private = (struct dasd_eckd_private *) device->private;
if (cqr->status == DASD_CQR_FAILED)
rc = -EIO;
list_del_init(&cqr->blocklist);
dasd_sfree_request(cqr, device);
private->count--;
}
if (rc)
goto out;
if (sleep_rc)
return sleep_rc;
} while (retry);
/*
* in case of ENOMEM we need to retry after
* first requests are finished
*/
if (fdata->start_unit <= fdata->stop_unit)
goto retry;
out:
fdata->start_unit = old_start;
fdata->stop_unit = old_stop;
return rc;
}
static int dasd_eckd_format_device(struct dasd_device *base,
struct format_data_t *fdata, int enable_pav)
{
return dasd_eckd_format_process_data(base, fdata, enable_pav);
}
static void dasd_eckd_handle_terminated_request(struct dasd_ccw_req *cqr)
{
if (cqr->retries < 0) {
@ -2543,9 +2536,8 @@ static void dasd_eckd_check_for_device_change(struct dasd_device *device,
{
char mask;
char *sense = NULL;
struct dasd_eckd_private *private;
struct dasd_eckd_private *private = device->private;
private = (struct dasd_eckd_private *) device->private;
/* first of all check for state change pending interrupt */
mask = DEV_STAT_ATTENTION | DEV_STAT_DEV_END | DEV_STAT_UNIT_EXCEP;
if ((scsw_dstat(&irb->scsw) & mask) == mask) {
@ -2634,7 +2626,7 @@ static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_single(
struct dasd_device *basedev;
basedev = block->base;
private = (struct dasd_eckd_private *) basedev->private;
private = basedev->private;
if (rq_data_dir(req) == READ)
cmd = DASD_ECKD_CCW_READ_MT;
else if (rq_data_dir(req) == WRITE)
@ -2990,8 +2982,8 @@ static int prepare_itcw(struct itcw *itcw,
/* setup prefix data */
basepriv = (struct dasd_eckd_private *) basedev->private;
startpriv = (struct dasd_eckd_private *) startdev->private;
basepriv = basedev->private;
startpriv = startdev->private;
dedata = &pfxdata.define_extent;
lredata = &pfxdata.locate_record;
@ -3278,7 +3270,7 @@ static struct dasd_ccw_req *dasd_eckd_build_cp(struct dasd_device *startdev,
struct dasd_ccw_req *cqr;
basedev = block->base;
private = (struct dasd_eckd_private *) basedev->private;
private = basedev->private;
/* Calculate number of blocks/records per track. */
blksize = block->bp_block;
@ -3503,7 +3495,7 @@ dasd_eckd_free_cp(struct dasd_ccw_req *cqr, struct request *req)
if (!dasd_page_cache)
goto out;
private = (struct dasd_eckd_private *) cqr->block->base->private;
private = cqr->block->base->private;
blksize = cqr->block->bp_block;
blk_per_trk = recs_per_track(&private->rdc_data, 0, blksize);
recid = blk_rq_pos(req) >> cqr->block->s2b_shift;
@ -3587,7 +3579,7 @@ static struct dasd_ccw_req *dasd_eckd_build_alias_cp(struct dasd_device *base,
startdev = dasd_alias_get_start_dev(base);
if (!startdev)
startdev = base;
private = (struct dasd_eckd_private *) startdev->private;
private = startdev->private;
if (private->count >= DASD_ECKD_CHANQ_MAX_SIZE)
return ERR_PTR(-EBUSY);
@ -3610,7 +3602,7 @@ static int dasd_eckd_free_alias_cp(struct dasd_ccw_req *cqr,
unsigned long flags;
spin_lock_irqsave(get_ccwdev_lock(cqr->memdev->cdev), flags);
private = (struct dasd_eckd_private *) cqr->memdev->private;
private = cqr->memdev->private;
private->count--;
spin_unlock_irqrestore(get_ccwdev_lock(cqr->memdev->cdev), flags);
return dasd_eckd_free_cp(cqr, req);
@ -3620,15 +3612,14 @@ static int
dasd_eckd_fill_info(struct dasd_device * device,
struct dasd_information2_t * info)
{
struct dasd_eckd_private *private;
struct dasd_eckd_private *private = device->private;
private = (struct dasd_eckd_private *) device->private;
info->label_block = 2;
info->FBA_layout = private->uses_cdl ? 0 : 1;
info->format = private->uses_cdl ? DASD_FORMAT_CDL : DASD_FORMAT_LDL;
info->characteristics_size = sizeof(struct dasd_eckd_characteristics);
info->characteristics_size = sizeof(private->rdc_data);
memcpy(info->characteristics, &private->rdc_data,
sizeof(struct dasd_eckd_characteristics));
sizeof(private->rdc_data));
info->confdata_size = min((unsigned long)private->conf_len,
sizeof(info->configuration_data));
memcpy(info->configuration_data, private->conf_data,
@ -3941,8 +3932,7 @@ dasd_eckd_performance(struct dasd_device *device, void __user *argp)
static int
dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp)
{
struct dasd_eckd_private *private =
(struct dasd_eckd_private *)device->private;
struct dasd_eckd_private *private = device->private;
struct attrib_data_t attrib = private->attrib;
int rc;
@ -3966,8 +3956,7 @@ dasd_eckd_get_attrib(struct dasd_device *device, void __user *argp)
static int
dasd_eckd_set_attrib(struct dasd_device *device, void __user *argp)
{
struct dasd_eckd_private *private =
(struct dasd_eckd_private *)device->private;
struct dasd_eckd_private *private = device->private;
struct attrib_data_t attrib;
if (!capable(CAP_SYS_ADMIN))
@ -4430,15 +4419,13 @@ static int dasd_eckd_pm_freeze(struct dasd_device *device)
static int dasd_eckd_restore_device(struct dasd_device *device)
{
struct dasd_eckd_private *private;
struct dasd_eckd_private *private = device->private;
struct dasd_eckd_characteristics temp_rdc_data;
int rc;
struct dasd_uid temp_uid;
unsigned long flags;
unsigned long cqr_flags = 0;
private = (struct dasd_eckd_private *) device->private;
/* Read Configuration Data */
rc = dasd_eckd_read_conf(device);
if (rc) {
@ -4502,14 +4489,12 @@ out_err:
static int dasd_eckd_reload_device(struct dasd_device *device)
{
struct dasd_eckd_private *private;
struct dasd_eckd_private *private = device->private;
int rc, old_base;
char print_uid[60];
struct dasd_uid uid;
unsigned long flags;
private = (struct dasd_eckd_private *) device->private;
spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
old_base = private->uid.base_unit_addr;
spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
@ -4556,12 +4541,10 @@ static int dasd_eckd_read_message_buffer(struct dasd_device *device,
{
struct dasd_rssd_messages *message_buf;
struct dasd_psf_prssd_data *prssdp;
struct dasd_eckd_private *private;
struct dasd_ccw_req *cqr;
struct ccw1 *ccw;
int rc;
private = (struct dasd_eckd_private *) device->private;
cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, 1 /* PSF */ + 1 /* RSSD */,
(sizeof(struct dasd_psf_prssd_data) +
sizeof(struct dasd_rssd_messages)),
@ -4686,11 +4669,10 @@ static struct dasd_conf_data *dasd_eckd_get_ref_conf(struct dasd_device *device,
__u8 lpum,
struct dasd_cuir_message *cuir)
{
struct dasd_eckd_private *private;
struct dasd_eckd_private *private = device->private;
struct dasd_conf_data *conf_data;
int path, pos;
private = (struct dasd_eckd_private *) device->private;
if (cuir->record_selector == 0)
goto out;
for (path = 0x80, pos = 0; path; path >>= 1, pos++) {
@ -4715,9 +4697,9 @@ out:
static int dasd_eckd_cuir_scope(struct dasd_device *device, __u8 lpum,
struct dasd_cuir_message *cuir)
{
struct dasd_eckd_private *private = device->private;
struct dasd_conf_data *ref_conf_data;
unsigned long bitmask = 0, mask = 0;
struct dasd_eckd_private *private;
struct dasd_conf_data *conf_data;
unsigned int pos, path;
char *ref_gneq, *gneq;
@ -4730,7 +4712,6 @@ static int dasd_eckd_cuir_scope(struct dasd_device *device, __u8 lpum,
!(cuir->neq_map[0] | cuir->neq_map[1] | cuir->neq_map[2]))
return lpum;
private = (struct dasd_eckd_private *) device->private;
/* get reference conf data */
ref_conf_data = dasd_eckd_get_ref_conf(device, lpum, cuir);
/* reference ned is determined by ned_map field */
@ -4829,14 +4810,13 @@ static int dasd_eckd_cuir_quiesce(struct dasd_device *device, __u8 lpum,
struct subchannel_id sch_id,
struct dasd_cuir_message *cuir)
{
struct dasd_eckd_private *private = device->private;
struct alias_pav_group *pavgroup, *tempgroup;
struct dasd_eckd_private *private;
struct dasd_device *dev, *n;
unsigned long paths = 0;
unsigned long flags;
int tbcpm;
private = (struct dasd_eckd_private *) device->private;
/* active devices */
list_for_each_entry_safe(dev, n, &private->lcu->active_devices,
alias_list) {
@ -4892,13 +4872,12 @@ static int dasd_eckd_cuir_resume(struct dasd_device *device, __u8 lpum,
struct subchannel_id sch_id,
struct dasd_cuir_message *cuir)
{
struct dasd_eckd_private *private = device->private;
struct alias_pav_group *pavgroup, *tempgroup;
struct dasd_eckd_private *private;
struct dasd_device *dev, *n;
unsigned long paths = 0;
int tbcpm;
private = (struct dasd_eckd_private *) device->private;
/*
* the path may have been added through a generic path event before
* only trigger path verification if the path is not already in use

28
drivers/s390/block/dasd_fba.c
View File

@ -125,13 +125,11 @@ locate_record(struct ccw1 * ccw, struct LO_fba_data *data, int rw,
static int
dasd_fba_check_characteristics(struct dasd_device *device)
{
struct dasd_block *block;
struct dasd_fba_private *private;
struct dasd_fba_private *private = device->private;
struct ccw_device *cdev = device->cdev;
int rc;
int readonly;
struct dasd_block *block;
int readonly, rc;
private = (struct dasd_fba_private *) device->private;
if (!private) {
private = kzalloc(sizeof(*private), GFP_KERNEL | GFP_DMA);
if (!private) {
@ -140,7 +138,7 @@ dasd_fba_check_characteristics(struct dasd_device *device)
"data failed\n");
return -ENOMEM;
}
device->private = (void *) private;
device->private = private;
} else {
memset(private, 0, sizeof(*private));
}
@ -192,10 +190,9 @@ dasd_fba_check_characteristics(struct dasd_device *device)
static int dasd_fba_do_analysis(struct dasd_block *block)
{
struct dasd_fba_private *private;
struct dasd_fba_private *private = block->base->private;
int sb, rc;
private = (struct dasd_fba_private *) block->base->private;
rc = dasd_check_blocksize(private->rdc_data.blk_size);
if (rc) {
DBF_DEV_EVENT(DBF_WARNING, block->base, "unknown blocksize %d",
@ -254,7 +251,7 @@ static struct dasd_ccw_req *dasd_fba_build_cp(struct dasd_device * memdev,
struct dasd_block *block,
struct request *req)
{
struct dasd_fba_private *private;
struct dasd_fba_private *private = block->base->private;
unsigned long *idaws;
struct LO_fba_data *LO_data;
struct dasd_ccw_req *cqr;
@ -267,7 +264,6 @@ static struct dasd_ccw_req *dasd_fba_build_cp(struct dasd_device * memdev,
unsigned int blksize, off;
unsigned char cmd;
private = (struct dasd_fba_private *) block->base->private;
if (rq_data_dir(req) == READ) {
cmd = DASD_FBA_CCW_READ;
} else if (rq_data_dir(req) == WRITE) {
@ -379,7 +375,7 @@ static struct dasd_ccw_req *dasd_fba_build_cp(struct dasd_device * memdev,
static int
dasd_fba_free_cp(struct dasd_ccw_req *cqr, struct request *req)
{
struct dasd_fba_private *private;
struct dasd_fba_private *private = cqr->block->base->private;
struct ccw1 *ccw;
struct req_iterator iter;
struct bio_vec bv;
@ -389,7 +385,6 @@ dasd_fba_free_cp(struct dasd_ccw_req *cqr, struct request *req)
if (!dasd_page_cache)
goto out;
private = (struct dasd_fba_private *) cqr->block->base->private;
blksize = cqr->block->bp_block;
ccw = cqr->cpaddr;
/* Skip over define extent & locate record. */
@ -436,13 +431,14 @@ static int
dasd_fba_fill_info(struct dasd_device * device,
struct dasd_information2_t * info)
{
struct dasd_fba_private *private = device->private;
info->label_block = 1;
info->FBA_layout = 1;
info->format = DASD_FORMAT_LDL;
info->characteristics_size = sizeof(struct dasd_fba_characteristics);
memcpy(info->characteristics,
&((struct dasd_fba_private *) device->private)->rdc_data,
sizeof (struct dasd_fba_characteristics));
info->characteristics_size = sizeof(private->rdc_data);
memcpy(info->characteristics, &private->rdc_data,
sizeof(private->rdc_data));
info->confdata_size = 0;
return 0;
}

4
drivers/s390/block/dasd_genhd.c
View File

@ -178,8 +178,8 @@ int dasd_gendisk_init(void)
/* Register to static dasd major 94 */
rc = register_blkdev(DASD_MAJOR, "dasd");
if (rc != 0) {
pr_warning("Registering the device driver with major number "
"%d failed\n", DASD_MAJOR);
pr_warn("Registering the device driver with major number %d failed\n",
DASD_MAJOR);
return rc;
}
return 0;

9
drivers/s390/block/dasd_int.h
View File

@ -240,6 +240,13 @@ struct dasd_ccw_req {
/* Signature for error recovery functions. */
typedef struct dasd_ccw_req *(*dasd_erp_fn_t) (struct dasd_ccw_req *);
/*
* A single CQR can only contain a maximum of 255 CCWs. It is limited by
* the locate record and locate record extended count value which can only hold
* 1 Byte max.
*/
#define DASD_CQR_MAX_CCW 255
/*
* Unique identifier for dasd device.
*/
@ -438,7 +445,7 @@ struct dasd_device {
/* Device discipline stuff. */
struct dasd_discipline *discipline;
struct dasd_discipline *base_discipline;
char *private;
void *private;
struct dasd_path path_data;
/* Device state and target state. */

36
drivers/s390/block/dasd_ioctl.c
View File

@ -203,9 +203,7 @@ static int
dasd_format(struct dasd_block *block, struct format_data_t *fdata)
{
struct dasd_device *base;
int enable_pav = 1;
int rc, retries;
int start, stop;
int rc;
base = block->base;
if (base->discipline->format_device == NULL)
@ -233,30 +231,11 @@ dasd_format(struct dasd_block *block, struct format_data_t *fdata)
bdput(bdev);
}
retries = 255;
/* backup start- and endtrack for retries */
start = fdata->start_unit;
stop = fdata->stop_unit;
do {
rc = base->discipline->format_device(base, fdata, enable_pav);
if (rc) {
if (rc == -EAGAIN) {
retries--;
/* disable PAV in case of errors */
enable_pav = 0;
fdata->start_unit = start;
fdata->stop_unit = stop;
} else
return rc;
} else
/* success */
break;
} while (retries);
rc = base->discipline->format_device(base, fdata, 1);
if (rc == -EAGAIN)
rc = base->discipline->format_device(base, fdata, 0);
if (!retries)
return -EIO;
else
return 0;
return rc;
}
/*
@ -286,9 +265,8 @@ dasd_ioctl_format(struct block_device *bdev, void __user *argp)
return -EFAULT;
}
if (bdev != bdev->bd_contains) {
pr_warning("%s: The specified DASD is a partition and cannot "
"be formatted\n",
dev_name(&base->cdev->dev));
pr_warn("%s: The specified DASD is a partition and cannot be formatted\n",
dev_name(&base->cdev->dev));
dasd_put_device(base);
return -EINVAL;
}

5
drivers/s390/block/dasd_proc.c
View File

@ -322,13 +322,12 @@ static ssize_t dasd_stats_proc_write(struct file *file,
return user_len;
out_parse_error:
rc = -EINVAL;
pr_warning("%s is not a supported value for /proc/dasd/statistics\n",
str);
pr_warn("%s is not a supported value for /proc/dasd/statistics\n", str);
out_error:
vfree(buffer);
return rc;
#else
pr_warning("/proc/dasd/statistics: is not activated in this kernel\n");
pr_warn("/proc/dasd/statistics: is not activated in this kernel\n");
return user_len;
#endif /* CONFIG_DASD_PROFILE */
}

13
drivers/s390/block/dcssblk.c
View File

@ -738,15 +738,15 @@ dcssblk_remove_store(struct device *dev, struct device_attribute *attr, const ch
dev_info = dcssblk_get_device_by_name(local_buf);
if (dev_info == NULL) {
up_write(&dcssblk_devices_sem);
pr_warning("Device %s cannot be removed because it is not a "
"known device\n", local_buf);
pr_warn("Device %s cannot be removed because it is not a known device\n",
local_buf);
rc = -ENODEV;
goto out_buf;
}
if (atomic_read(&dev_info->use_count) != 0) {
up_write(&dcssblk_devices_sem);
pr_warning("Device %s cannot be removed while it is in "
"use\n", local_buf);
pr_warn("Device %s cannot be removed while it is in use\n",
local_buf);
rc = -EBUSY;
goto out_buf;
}
@ -850,9 +850,8 @@ dcssblk_make_request(struct request_queue *q, struct bio *bio)
case SEG_TYPE_SC:
/* cannot write to these segments */
if (bio_data_dir(bio) == WRITE) {
pr_warning("Writing to %s failed because it "
"is a read-only device\n",
dev_name(&dev_info->dev));
pr_warn("Writing to %s failed because it is a read-only device\n",
dev_name(&dev_info->dev));
goto fail;
}
}

10
drivers/s390/char/monreader.c
View File

@ -257,7 +257,7 @@ static void mon_iucv_message_pending(struct iucv_path *path,
memcpy(&monpriv->msg_array[monpriv->write_index]->msg,
msg, sizeof(*msg));
if (atomic_inc_return(&monpriv->msglim_count) == MON_MSGLIM) {
pr_warning("The read queue for monitor data is full\n");
pr_warn("The read queue for monitor data is full\n");
monpriv->msg_array[monpriv->write_index]->msglim_reached = 1;
}
monpriv->write_index = (monpriv->write_index + 1) % MON_MSGLIM;
@ -342,8 +342,8 @@ static int mon_close(struct inode *inode, struct file *filp)
if (monpriv->path) {
rc = iucv_path_sever(monpriv->path, user_data_sever);
if (rc)
pr_warning("Disconnecting the z/VM *MONITOR system "
"service failed with rc=%i\n", rc);
pr_warn("Disconnecting the z/VM *MONITOR system service failed with rc=%i\n",
rc);
iucv_path_free(monpriv->path);
}
@ -469,8 +469,8 @@ static int monreader_freeze(struct device *dev)
if (monpriv->path) {
rc = iucv_path_sever(monpriv->path, user_data_sever);
if (rc)
pr_warning("Disconnecting the z/VM *MONITOR system "
"service failed with rc=%i\n", rc);
pr_warn("Disconnecting the z/VM *MONITOR system service failed with rc=%i\n",
rc);
iucv_path_free(monpriv->path);
}
atomic_set(&monpriv->iucv_severed, 0);

27
drivers/s390/char/sclp_cmd.c
View File

@ -67,8 +67,8 @@ int sclp_sync_request_timeout(sclp_cmdw_t cmd, void *sccb, int timeout)
/* Check response. */
if (request->status != SCLP_REQ_DONE) {
pr_warning("sync request failed (cmd=0x%08x, "
"status=0x%02x)\n", cmd, request->status);
pr_warn("sync request failed (cmd=0x%08x, status=0x%02x)\n",
cmd, request->status);
rc = -EIO;
}
out:
@ -122,8 +122,8 @@ int sclp_get_core_info(struct sclp_core_info *info)
if (rc)
goto out;
if (sccb->header.response_code != 0x0010) {
pr_warning("readcpuinfo failed (response=0x%04x)\n",
sccb->header.response_code);
pr_warn("readcpuinfo failed (response=0x%04x)\n",
sccb->header.response_code);
rc = -EIO;
goto out;
}
@ -160,9 +160,8 @@ static int do_core_configure(sclp_cmdw_t cmd)
case 0x0120:
break;
default:
pr_warning("configure cpu failed (cmd=0x%08x, "
"response=0x%04x)\n", cmd,
sccb->header.response_code);
pr_warn("configure cpu failed (cmd=0x%08x, response=0x%04x)\n",
cmd, sccb->header.response_code);
rc = -EIO;
break;
}
@ -230,9 +229,8 @@ static int do_assign_storage(sclp_cmdw_t cmd, u16 rn)
case 0x0120:
break;
default:
pr_warning("assign storage failed (cmd=0x%08x, "
"response=0x%04x, rn=0x%04x)\n", cmd,
sccb->header.response_code, rn);
pr_warn("assign storage failed (cmd=0x%08x, response=0x%04x, rn=0x%04x)\n",
cmd, sccb->header.response_code, rn);
rc = -EIO;
break;
}
@ -675,9 +673,8 @@ static int do_chp_configure(sclp_cmdw_t cmd)
case 0x0450:
break;
default:
pr_warning("configure channel-path failed "
"(cmd=0x%08x, response=0x%04x)\n", cmd,
sccb->header.response_code);
pr_warn("configure channel-path failed (cmd=0x%08x, response=0x%04x)\n",
cmd, sccb->header.response_code);
rc = -EIO;
break;
}
@ -744,8 +741,8 @@ int sclp_chp_read_info(struct sclp_chp_info *info)
if (rc)
goto out;
if (sccb->header.response_code != 0x0010) {
pr_warning("read channel-path info failed "
"(response=0x%04x)\n", sccb->header.response_code);
pr_warn("read channel-path info failed (response=0x%04x)\n",
sccb->header.response_code);
rc = -EIO;
goto out;
}

6
drivers/s390/char/sclp_cpi_sys.c
View File

@ -154,16 +154,14 @@ static int cpi_req(void)
wait_for_completion(&completion);
if (req->status != SCLP_REQ_DONE) {
pr_warning("request failed (status=0x%02x)\n",
req->status);
pr_warn("request failed (status=0x%02x)\n", req->status);
rc = -EIO;
goto out_free_req;
}
response = ((struct cpi_sccb *) req->sccb)->header.response_code;
if (response != 0x0020) {
pr_warning("request failed with response code 0x%x\n",
response);
pr_warn("request failed with response code 0x%x\n", response);
rc = -EIO;
}

4
drivers/s390/char/tape_core.c
View File

@ -699,8 +699,8 @@ tape_generic_remove(struct ccw_device *cdev)
*/
DBF_EVENT(3, "(%08x): Drive in use vanished!\n",
device->cdev_id);
pr_warning("%s: A tape unit was detached while in "
"use\n", dev_name(&device->cdev->dev));
pr_warn("%s: A tape unit was detached while in use\n",
dev_name(&device->cdev->dev));
tape_state_set(device, TS_NOT_OPER);
__tape_discard_requests(device);
spin_unlock_irq(get_ccwdev_lock(device->cdev));

6
drivers/s390/char/vmlogrdr.c
View File

@ -343,8 +343,7 @@ static int vmlogrdr_open (struct inode *inode, struct file *filp)
if (logptr->autorecording) {
ret = vmlogrdr_recording(logptr,1,logptr->autopurge);
if (ret)
pr_warning("vmlogrdr: failed to start "
"recording automatically\n");
pr_warn("vmlogrdr: failed to start recording automatically\n");
}
/* create connection to the system service */
@ -396,8 +395,7 @@ static int vmlogrdr_release (struct inode *inode, struct file *filp)
if (logptr->autorecording) {
ret = vmlogrdr_recording(logptr,0,logptr->autopurge);
if (ret)
pr_warning("vmlogrdr: failed to stop "
"recording automatically\n");
pr_warn("vmlogrdr: failed to stop recording automatically\n");
}
logptr->dev_in_use = 0;

9
drivers/s390/cio/blacklist.c
View File

@ -51,9 +51,8 @@ static int blacklist_range(range_action action, unsigned int from_ssid,
{
if ((from_ssid > to_ssid) || ((from_ssid == to_ssid) && (from > to))) {
if (msgtrigger)
pr_warning("0.%x.%04x to 0.%x.%04x is not a valid "
"range for cio_ignore\n", from_ssid, from,
to_ssid, to);
pr_warn("0.%x.%04x to 0.%x.%04x is not a valid range for cio_ignore\n",
from_ssid, from, to_ssid, to);
return 1;
}
@ -140,8 +139,8 @@ static int parse_busid(char *str, unsigned int *cssid, unsigned int *ssid,
rc = 0;
out:
if (rc && msgtrigger)
pr_warning("%s is not a valid device for the cio_ignore "
"kernel parameter\n", str);
pr_warn("%s is not a valid device for the cio_ignore kernel parameter\n",
str);
return rc;
}

13
drivers/s390/cio/ccwreq.c
View File

@ -333,13 +333,12 @@ void ccw_request_timeout(struct ccw_device *cdev)
for (chp = 0; chp < 8; chp++) {
if ((0x80 >> chp) & sch->schib.pmcw.lpum)
pr_warning("%s: No interrupt was received within %lus "
"(CS=%02x, DS=%02x, CHPID=%x.%02x)\n",
dev_name(&cdev->dev), req->timeout / HZ,
scsw_cstat(&sch->schib.scsw),
scsw_dstat(&sch->schib.scsw),
sch->schid.cssid,
sch->schib.pmcw.chpid[chp]);
pr_warn("%s: No interrupt was received within %lus (CS=%02x, DS=%02x, CHPID=%x.%02x)\n",
dev_name(&cdev->dev), req->timeout / HZ,
scsw_cstat(&sch->schib.scsw),
scsw_dstat(&sch->schib.scsw),
sch->schid.cssid,
sch->schib.pmcw.chpid[chp]);
}
if (!ccwreq_next_path(cdev)) {

2
drivers/s390/cio/cio.c
View File

@ -656,7 +656,7 @@ struct subchannel *cio_probe_console(void)
sch_no = cio_get_console_sch_no();
if (sch_no == -1) {
pr_warning("No CCW console was found\n");
pr_warn("No CCW console was found\n");
return ERR_PTR(-ENODEV);
}
init_subchannel_id(&schid);

23
drivers/s390/cio/device.c
View File

@ -364,11 +364,11 @@ int ccw_device_set_offline(struct ccw_device *cdev)
cdev->private->state == DEV_STATE_DISCONNECTED));
/* Inform the user if set offline failed. */
if (cdev->private->state == DEV_STATE_BOXED) {
pr_warning("%s: The device entered boxed state while "
"being set offline\n", dev_name(&cdev->dev));
pr_warn("%s: The device entered boxed state while being set offline\n",
dev_name(&cdev->dev));
} else if (cdev->private->state == DEV_STATE_NOT_OPER) {
pr_warning("%s: The device stopped operating while "
"being set offline\n", dev_name(&cdev->dev));
pr_warn("%s: The device stopped operating while being set offline\n",
dev_name(&cdev->dev));
}
/* Give up reference from ccw_device_set_online(). */
put_device(&cdev->dev);
@ -429,13 +429,11 @@ int ccw_device_set_online(struct ccw_device *cdev)
spin_unlock_irq(cdev->ccwlock);
/* Inform the user that set online failed. */
if (cdev->private->state == DEV_STATE_BOXED) {
pr_warning("%s: Setting the device online failed "
"because it is boxed\n",
dev_name(&cdev->dev));
pr_warn("%s: Setting the device online failed because it is boxed\n",
dev_name(&cdev->dev));
} else if (cdev->private->state == DEV_STATE_NOT_OPER) {
pr_warning("%s: Setting the device online failed "
"because it is not operational\n",
dev_name(&cdev->dev));
pr_warn("%s: Setting the device online failed because it is not operational\n",
dev_name(&cdev->dev));
}
/* Give up online reference since onlining failed. */
put_device(&cdev->dev);
@ -619,9 +617,8 @@ initiate_logging(struct device *dev, struct device_attribute *attr,
rc = chsc_siosl(sch->schid);
if (rc < 0) {
pr_warning("Logging for subchannel 0.%x.%04x failed with "
"errno=%d\n",
sch->schid.ssid, sch->schid.sch_no, rc);
pr_warn("Logging for subchannel 0.%x.%04x failed with errno=%d\n",
sch->schid.ssid, sch->schid.sch_no, rc);
return rc;
}
pr_notice("Logging for subchannel 0.%x.%04x was triggered\n",

4
drivers/s390/net/lcs.c
View File

@ -1761,8 +1761,8 @@ lcs_get_control(struct lcs_card *card, struct lcs_cmd *cmd)
lcs_schedule_recovery(card);
break;
case LCS_CMD_STOPLAN:
pr_warning("Stoplan for %s initiated by LGW.\n",
card->dev->name);
pr_warn("Stoplan for %s initiated by LGW\n",
card->dev->name);
if (card->dev)
netif_carrier_off(card->dev);
break;

2
drivers/s390/net/qeth_l3_main.c
View File

@ -3624,7 +3624,7 @@ static int qeth_l3_register_notifiers(void)
return rc;
}
#else
pr_warning("There is no IPv6 support for the layer 3 discipline\n");
pr_warn("There is no IPv6 support for the layer 3 discipline\n");
#endif
return 0;
}