powerpc/powernv: Machine check exception handling.

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Add basic error handling in machine check exception handler.

- If MSR_RI isn't set, we can not recover.
- Check if disposition set to OpalMCE_DISPOSITION_RECOVERED.
- Check if address at fault is inside kernel address space, if not then send
  SIGBUS to process if we hit exception when in userspace.
- If address at fault is not provided then and if we get a synchronous machine
  check while in userspace then kill the task.

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 2013-10-30 20:06:13 +05:30 • committed by Benjamin Herrenschmidt

parent 28446de2ce

commit b63a0ffe35

3 changed files with 70 additions and 1 deletions

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arch/powerpc/include/asm/mce.h

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27

arch/powerpc/kernel/mce.c

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43

arch/powerpc/platforms/powernv/opal.c

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