[PATCH v4 0/6] powerpc/pseries: Machien check handler improvements.

[Mahesh J Salgaonkar]

This patch series includes some improvement to Machine check handler
for pseries. Patch 1 fixes an issue where machine check handler crashes
kernel while accessing vmalloc-ed buffer while in nmi context.
Patch 2 fixes endain bug while restoring of r3 in MCE handler.
Patch 4 implements a real mode mce handler and flushes the SLBs on SLB error.
Patch 5 display's the MCE error details on console.
Patch 6 saves and dumps the SLB contents on SLB MCE errors to improve the
debugability.

Change in V4:
- Flush the SLBs in real mode mce handler to handle SLB errors for entry 0.
- Allocate buffers per cpu to hold rtas error log and old slb contents.
- Defer the logging of rtas error log to irq work queue.

Change in V3:
- Moved patch 5 to patch 2

Change in V2:
- patch 3: Display additional info (NIP and task info) in MCE error details.
- patch 5: Fix endain bug while restoring of r3 in MCE handler.


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Mahesh Salgaonkar (6):
      powerpc/pseries: Defer the logging of rtas error to irq work queue.
      powerpc/pseries: Fix endainness while restoring of r3 in MCE handler.
      powerpc/pseries: Define MCE error event section.
      powerpc/pseries: flush SLB contents on SLB MCE errors.
      powerpc/pseries: Display machine check error details.
      powerpc/pseries: Dump the SLB contents on SLB MCE errors.


 arch/powerpc/include/asm/book3s/64/mmu-hash.h |    8 +
 arch/powerpc/include/asm/machdep.h            |    1 
 arch/powerpc/include/asm/paca.h               |    4 
 arch/powerpc/include/asm/rtas.h               |  116 ++++++++++++
 arch/powerpc/kernel/exceptions-64s.S          |   42 ++++
 arch/powerpc/kernel/mce.c                     |   16 +-
 arch/powerpc/mm/slb.c                         |   63 +++++++
 arch/powerpc/platforms/powernv/opal.c         |    1 
 arch/powerpc/platforms/pseries/pseries.h      |    1 
 arch/powerpc/platforms/pseries/ras.c          |  236 +++++++++++++++++++++++--
 arch/powerpc/platforms/pseries/setup.c        |   27 +++
 11 files changed, 497 insertions(+), 18 deletions(-)

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