fadump: Convert firmware-assisted cpu state dump data into elf notes.

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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>

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Mahesh Salgaonkar 2012-02-16 01:14:45 +00:00 • committed by Benjamin Herrenschmidt

parent 2df173d9e8

commit ebaeb5ae24

4 changed files with 365 additions and 2 deletions

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44

arch/powerpc/include/asm/fadump.h

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314

arch/powerpc/kernel/fadump.c

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6

arch/powerpc/kernel/setup-common.c

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3

arch/powerpc/kernel/traps.c

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