2ec5e3a867
While testing kexec and kdump we hit problems where the new kernel would freeze or instantly reboot. The easiest way to trigger it was to kexec a kernel compiled for CONFIG_M586 on an athlon cpu. Compiling for CONFIG_MK7 instead would work fine. The patch fixes a few problems with the kexec inline asm. Signed-off-by: Chris Mason <mason@suse.com> Acked-by: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
131 lines
3.3 KiB
C
131 lines
3.3 KiB
C
#ifndef _ASM_POWERPC_KEXEC_H
|
|
#define _ASM_POWERPC_KEXEC_H
|
|
#ifdef __KERNEL__
|
|
|
|
/*
|
|
* Maximum page that is mapped directly into kernel memory.
|
|
* XXX: Since we copy virt we can use any page we allocate
|
|
*/
|
|
#define KEXEC_SOURCE_MEMORY_LIMIT (-1UL)
|
|
|
|
/*
|
|
* Maximum address we can reach in physical address mode.
|
|
* XXX: I want to allow initrd in highmem. Otherwise set to rmo on LPAR.
|
|
*/
|
|
#define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL)
|
|
|
|
/* Maximum address we can use for the control code buffer */
|
|
#ifdef __powerpc64__
|
|
#define KEXEC_CONTROL_MEMORY_LIMIT (-1UL)
|
|
#else
|
|
/* TASK_SIZE, probably left over from use_mm ?? */
|
|
#define KEXEC_CONTROL_MEMORY_LIMIT TASK_SIZE
|
|
#endif
|
|
|
|
#define KEXEC_CONTROL_CODE_SIZE 4096
|
|
|
|
/* The native architecture */
|
|
#ifdef __powerpc64__
|
|
#define KEXEC_ARCH KEXEC_ARCH_PPC64
|
|
#else
|
|
#define KEXEC_ARCH KEXEC_ARCH_PPC
|
|
#endif
|
|
|
|
#ifdef CONFIG_KEXEC
|
|
|
|
#ifndef __ASSEMBLY__
|
|
#ifdef __powerpc64__
|
|
/*
|
|
* This function is responsible for capturing register states if coming
|
|
* via panic or invoking dump using sysrq-trigger.
|
|
*/
|
|
static inline void crash_setup_regs(struct pt_regs *newregs,
|
|
struct pt_regs *oldregs)
|
|
{
|
|
if (oldregs)
|
|
memcpy(newregs, oldregs, sizeof(*newregs));
|
|
else {
|
|
/* FIXME Merge this with xmon_save_regs ?? */
|
|
unsigned long tmp1, tmp2;
|
|
__asm__ __volatile__ (
|
|
"std 0,0(%2)\n"
|
|
"std 1,8(%2)\n"
|
|
"std 2,16(%2)\n"
|
|
"std 3,24(%2)\n"
|
|
"std 4,32(%2)\n"
|
|
"std 5,40(%2)\n"
|
|
"std 6,48(%2)\n"
|
|
"std 7,56(%2)\n"
|
|
"std 8,64(%2)\n"
|
|
"std 9,72(%2)\n"
|
|
"std 10,80(%2)\n"
|
|
"std 11,88(%2)\n"
|
|
"std 12,96(%2)\n"
|
|
"std 13,104(%2)\n"
|
|
"std 14,112(%2)\n"
|
|
"std 15,120(%2)\n"
|
|
"std 16,128(%2)\n"
|
|
"std 17,136(%2)\n"
|
|
"std 18,144(%2)\n"
|
|
"std 19,152(%2)\n"
|
|
"std 20,160(%2)\n"
|
|
"std 21,168(%2)\n"
|
|
"std 22,176(%2)\n"
|
|
"std 23,184(%2)\n"
|
|
"std 24,192(%2)\n"
|
|
"std 25,200(%2)\n"
|
|
"std 26,208(%2)\n"
|
|
"std 27,216(%2)\n"
|
|
"std 28,224(%2)\n"
|
|
"std 29,232(%2)\n"
|
|
"std 30,240(%2)\n"
|
|
"std 31,248(%2)\n"
|
|
"mfmsr %0\n"
|
|
"std %0, 264(%2)\n"
|
|
"mfctr %0\n"
|
|
"std %0, 280(%2)\n"
|
|
"mflr %0\n"
|
|
"std %0, 288(%2)\n"
|
|
"bl 1f\n"
|
|
"1: mflr %1\n"
|
|
"std %1, 256(%2)\n"
|
|
"mtlr %0\n"
|
|
"mfxer %0\n"
|
|
"std %0, 296(%2)\n"
|
|
: "=&r" (tmp1), "=&r" (tmp2)
|
|
: "b" (newregs)
|
|
: "memory");
|
|
}
|
|
}
|
|
#else
|
|
/*
|
|
* Provide a dummy definition to avoid build failures. Will remain
|
|
* empty till crash dump support is enabled.
|
|
*/
|
|
static inline void crash_setup_regs(struct pt_regs *newregs,
|
|
struct pt_regs *oldregs) { }
|
|
#endif /* !__powerpc64 __ */
|
|
|
|
#define MAX_NOTE_BYTES 1024
|
|
|
|
#ifdef __powerpc64__
|
|
extern void kexec_smp_wait(void); /* get and clear naca physid, wait for
|
|
master to copy new code to 0 */
|
|
extern void __init kexec_setup(void);
|
|
extern int crashing_cpu;
|
|
extern void crash_send_ipi(void (*crash_ipi_callback)(struct pt_regs *));
|
|
#endif /* __powerpc64 __ */
|
|
|
|
struct kimage;
|
|
struct pt_regs;
|
|
extern void default_machine_kexec(struct kimage *image);
|
|
extern int default_machine_kexec_prepare(struct kimage *image);
|
|
extern void default_machine_crash_shutdown(struct pt_regs *regs);
|
|
|
|
extern void machine_kexec_simple(struct kimage *image);
|
|
|
|
#endif /* ! __ASSEMBLY__ */
|
|
#endif /* CONFIG_KEXEC */
|
|
#endif /* __KERNEL__ */
|
|
#endif /* _ASM_POWERPC_KEXEC_H */
|