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powerpc/mm: properly set PAGE_KERNEL flags in ioremap() 

Set PAGE_KERNEL directly in the caller and do not rely on a
hack adding PAGE_KERNEL flags when _PAGE_PRESENT is not set.

As already done for PPC64, use pgprot_cache() helpers instead of
_PAGE_XXX flags in PPC32 ioremap() derived functions.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Christophe Leroy 2018-10-09 13:51:43 +00:00 committed by Michael Ellerman
parent aa91796ec4
commit 56f3c1413f
7 changed files with 24 additions and 33 deletions
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2
arch/powerpc/include/asm/nohash/pgtable.h
View File

@ -197,6 +197,8 @@ extern int ptep_set_access_flags(struct vm_area_struct *vma, unsigned long addre
#if _PAGE_WRITETHRU != 0
#define pgprot_cached_wthru(prot) (__pgprot((pgprot_val(prot) & ~_PAGE_CACHE_CTL) | \
_PAGE_COHERENT | _PAGE_WRITETHRU))
#else
#define pgprot_cached_wthru(prot) pgprot_noncached(prot)
#endif
#define pgprot_cached_noncoherent(prot) \

6
arch/powerpc/kernel/isa-bridge.c
View File

@ -110,14 +110,14 @@ static void pci_process_ISA_OF_ranges(struct device_node *isa_node,
size = 0x10000;
__ioremap_at(phb_io_base_phys, (void *)ISA_IO_BASE,
size, pgprot_val(pgprot_noncached(__pgprot(0))));
size, pgprot_val(pgprot_noncached(PAGE_KERNEL)));
return;
inval_range:
printk(KERN_ERR "no ISA IO ranges or unexpected isa range, "
"mapping 64k\n");
__ioremap_at(phb_io_base_phys, (void *)ISA_IO_BASE,
0x10000, pgprot_val(pgprot_noncached(__pgprot(0))));
0x10000, pgprot_val(pgprot_noncached(PAGE_KERNEL)));
}
@ -253,7 +253,7 @@ void __init isa_bridge_init_non_pci(struct device_node *np)
*/
isa_io_base = ISA_IO_BASE;
__ioremap_at(pbase, (void *)ISA_IO_BASE,
size, pgprot_val(pgprot_noncached(__pgprot(0))));
size, pgprot_val(pgprot_noncached(PAGE_KERNEL)));
pr_debug("ISA: Non-PCI bridge is %pOF\n", np);
}

2
arch/powerpc/kernel/pci_64.c
View File

@ -159,7 +159,7 @@ static int pcibios_map_phb_io_space(struct pci_controller *hose)
/* Establish the mapping */
if (__ioremap_at(phys_page, area->addr, size_page,
pgprot_val(pgprot_noncached(__pgprot(0)))) == NULL)
pgprot_val(pgprot_noncached(PAGE_KERNEL))) == NULL)
return -ENOMEM;
/* Fixup hose IO resource */

28
arch/powerpc/mm/pgtable_32.c
View File

@ -76,32 +76,36 @@ pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address)
void __iomem *
ioremap(phys_addr_t addr, unsigned long size)
{
return __ioremap_caller(addr, size, _PAGE_NO_CACHE | _PAGE_GUARDED,
__builtin_return_address(0));
unsigned long flags = pgprot_val(pgprot_noncached(PAGE_KERNEL));
return __ioremap_caller(addr, size, flags, __builtin_return_address(0));
}
EXPORT_SYMBOL(ioremap);
void __iomem *
ioremap_wc(phys_addr_t addr, unsigned long size)
{
return __ioremap_caller(addr, size, _PAGE_NO_CACHE,
__builtin_return_address(0));
unsigned long flags = pgprot_val(pgprot_noncached_wc(PAGE_KERNEL));
return __ioremap_caller(addr, size, flags, __builtin_return_address(0));
}
EXPORT_SYMBOL(ioremap_wc);
void __iomem *
ioremap_wt(phys_addr_t addr, unsigned long size)
{
return __ioremap_caller(addr, size, _PAGE_WRITETHRU,
__builtin_return_address(0));
unsigned long flags = pgprot_val(pgprot_cached_wthru(PAGE_KERNEL));
return __ioremap_caller(addr, size, flags, __builtin_return_address(0));
}
EXPORT_SYMBOL(ioremap_wt);
void __iomem *
ioremap_coherent(phys_addr_t addr, unsigned long size)
{
return __ioremap_caller(addr, size, _PAGE_COHERENT,
__builtin_return_address(0));
unsigned long flags = pgprot_val(pgprot_cached(PAGE_KERNEL));
return __ioremap_caller(addr, size, flags, __builtin_return_address(0));
}
EXPORT_SYMBOL(ioremap_coherent);
@ -134,14 +138,6 @@ __ioremap_caller(phys_addr_t addr, unsigned long size, unsigned long flags,
phys_addr_t p;
int err;
/* Make sure we have the base flags */
if ((flags & _PAGE_PRESENT) == 0)
flags |= pgprot_val(PAGE_KERNEL);
/* Non-cacheable page cannot be coherent */
if (flags & _PAGE_NO_CACHE)
flags &= ~_PAGE_COHERENT;
/*
* Choose an address to map it to.
* Once the vmalloc system is running, we use it.

10
arch/powerpc/mm/pgtable_64.c
View File

@ -118,10 +118,6 @@ void __iomem * __ioremap_at(phys_addr_t pa, void *ea, unsigned long size,
{
unsigned long i;
/* Make sure we have the base flags */
if ((flags & _PAGE_PRESENT) == 0)
flags |= pgprot_val(PAGE_KERNEL);
/* We don't support the 4K PFN hack with ioremap */
if (flags & H_PAGE_4K_PFN)
return NULL;
@ -204,7 +200,7 @@ void __iomem * __ioremap(phys_addr_t addr, unsigned long size,
void __iomem * ioremap(phys_addr_t addr, unsigned long size)
{
unsigned long flags = pgprot_val(pgprot_noncached(__pgprot(0)));
unsigned long flags = pgprot_val(pgprot_noncached(PAGE_KERNEL));
void *caller = __builtin_return_address(0);
if (ppc_md.ioremap)
@ -214,7 +210,7 @@ void __iomem * ioremap(phys_addr_t addr, unsigned long size)
void __iomem * ioremap_wc(phys_addr_t addr, unsigned long size)
{
unsigned long flags = pgprot_val(pgprot_noncached_wc(__pgprot(0)));
unsigned long flags = pgprot_val(pgprot_noncached_wc(PAGE_KERNEL));
void *caller = __builtin_return_address(0);
if (ppc_md.ioremap)
@ -224,7 +220,7 @@ void __iomem * ioremap_wc(phys_addr_t addr, unsigned long size)
void __iomem *ioremap_coherent(phys_addr_t addr, unsigned long size)
{
unsigned long flags = pgprot_val(pgprot_cached(__pgprot(0)));
unsigned long flags = pgprot_val(pgprot_cached(PAGE_KERNEL));
void *caller = __builtin_return_address(0);
if (ppc_md.ioremap)

7
arch/powerpc/platforms/4xx/ocm.c
View File

@ -113,7 +113,6 @@ static void __init ocm_init_node(int count, struct device_node *node)
int len;
struct resource rsrc;
int ioflags;
ocm = ocm_get_node(count);
@ -179,9 +178,8 @@ static void __init ocm_init_node(int count, struct device_node *node)
/* ioremap the non-cached region */
if (ocm->nc.memtotal) {
ioflags = _PAGE_NO_CACHE | _PAGE_GUARDED | _PAGE_EXEC;
ocm->nc.virt = __ioremap(ocm->nc.phys, ocm->nc.memtotal,
ioflags);
_PAGE_EXEC | PAGE_KERNEL_NCG);
if (!ocm->nc.virt) {
printk(KERN_ERR
@ -195,9 +193,8 @@ static void __init ocm_init_node(int count, struct device_node *node)
/* ioremap the cached region */
if (ocm->c.memtotal) {
ioflags = _PAGE_EXEC;
ocm->c.virt = __ioremap(ocm->c.phys, ocm->c.memtotal,
ioflags);
_PAGE_EXEC | PAGE_KERNEL);
if (!ocm->c.virt) {
printk(KERN_ERR

2
drivers/pcmcia/electra_cf.c
View File

@ -230,7 +230,7 @@ static int electra_cf_probe(struct platform_device *ofdev)
if (!cf->mem_base || !cf->io_virt || !cf->gpio_base ||
(__ioremap_at(io.start, cf->io_virt, cf->io_size,
pgprot_val(pgprot_noncached(__pgprot(0)))) == NULL)) {
pgprot_val(pgprot_noncached(PAGE_KERNEL))) == NULL)) {
dev_err(device, "can't ioremap ranges\n");
status = -ENOMEM;
goto fail1;