xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

[PATCH] powerpc: Fix kdump copy regs and dynamic allocate per-cpu crash notes

Browse Source 
- This contains the arch specific changes for the following the
kdump generic fixes which were already accepted in the upstream.
       .   Capturing CPU registers (for the case of 'panic' and invoking
the dump using 'sysrq-trigger') from a function (stack frame) which will
be not be available during the kdump boot. Hence, might result in
invalid stack trace.
       .   Dynamically allocating per cpu ELF notes section instead of
statically for NR_CPUS.

- Fix the compiler warning in prom_init.c.

Signed-off-by: Haren Myneni <haren@us.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Haren Myneni
2006-01-13 19:15:36 -08:00
committed by Paul Mackerras
parent 9216ad8cb7
commit 8385a6a3ac
3 changed files with 80 additions and 85 deletions
Download Patch File Download Diff File Expand all files Collapse all files

85
include/asm-powerpc/kexec.h
View File

@@ -31,12 +31,80 @@
#define KEXEC_ARCH KEXEC_ARCH_PPC
#endif
#define HAVE_ARCH_COPY_OLDMEM_PAGE
#ifndef __ASSEMBLY__
#ifdef CONFIG_KEXEC
#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));
}
}
#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 __ */
#ifndef __ASSEMBLY__
#define MAX_NOTE_BYTES 1024
#ifdef __powerpc64__
@@ -53,14 +121,7 @@ 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);
#endif /* !CONFIG_KEXEC */
/*
* 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 /* ! __ASSEMBLY__ */
#endif /* CONFIG_KEXEC */
#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_KEXEC_H */