diff options
| author | Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> | 2012-02-16 01:14:45 (GMT) |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2012-02-22 23:50:01 (GMT) |
| commit | ebaeb5ae24379b5b635dc1d1fa6df904bc95b4d9 (patch) | |
| tree | 4c1d54e9ec25f48dd05708ed62d5eb6db9d0ba9d /arch/powerpc/kernel/setup-common.c | |
| parent | 2df173d9e85d9e2c6a8933c63f0c034accff7e0f (diff) | |
| download | linux-ebaeb5ae24379b5b635dc1d1fa6df904bc95b4d9.tar.xz | |
fadump: Convert firmware-assisted cpu state dump data into elf notes.
When registered for firmware assisted dump on powerpc, firmware preserves
the registers for the active CPUs during a system crash. This patch reads
the cpu register data stored in Firmware-assisted dump format (except for
crashing cpu) and converts it into elf notes and updates the PT_NOTE program
header accordingly. The exact register state for crashing cpu is saved to
fadump crash info structure in scratch area during crash_fadump() and read
during second kernel boot.
Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/kernel/setup-common.c')
| -rw-r--r-- | arch/powerpc/kernel/setup-common.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c index 77bb77d..4e62a56 100644 --- a/arch/powerpc/kernel/setup-common.c +++ b/arch/powerpc/kernel/setup-common.c @@ -61,6 +61,7 @@ #include <asm/xmon.h> #include <asm/cputhreads.h> #include <mm/mmu_decl.h> +#include <asm/fadump.h> #include "setup.h" @@ -639,6 +640,11 @@ EXPORT_SYMBOL(check_legacy_ioport); static int ppc_panic_event(struct notifier_block *this, unsigned long event, void *ptr) { + /* + * If firmware-assisted dump has been registered then trigger + * firmware-assisted dump and let firmware handle everything else. + */ + crash_fadump(NULL, ptr); ppc_md.panic(ptr); /* May not return */ return NOTIFY_DONE; } |