Hi,
Please find the patch set that performs the machine check handling inside linux
host. The design is to be able to handle re-entrancy so that we do not clobber
the machine check information during nested machine check interrupt.
The patch 2 implements the logic to save the raw MCE info onto the emergency
stack and prepares to take another exception. Patch 3 and 4 adds CPU-side hooks
for early machine check handler and TLB flush. The patch 5 and 6 is
responsible to detect SLB/TLB errors and flush them off in the real mode. The
patch 7 implements the logic to decode and save high level MCE information to
per cpu buffer without clobbering. The patch 9 adds the basic error handling to
the high level C code with MMU on.
I have tested SLB multihit scenario on powernv. For TLB multihit and nested
machine check testing, I am still working on getting cronus setup to be able
to inject errors.
Please review and let me know your comments.
Thanks,
-Mahesh.
---
Mahesh Salgaonkar (9):
powerpc: Split the common exception prolog logic into two section.
powerpc: handle machine check in Linux host.
powerpc: Introduce a early machine check hook in cpu_spec.
powerpc: Add flush_tlb operation in cpu_spec.
powerpc: Flush SLB/TLBs if we get SLB/TLB machine check errors on power7.
powerpc: Flush SLB/TLBs if we get SLB/TLB machine check errors on power8.
powerpc: Decode and save machine check event.
powerpc/powernv: Remove machine check handling in OPAL.
powerpc/powernv: Machine check exception handling.
arch/powerpc/include/asm/bitops.h | 5 +
arch/powerpc/include/asm/cputable.h | 12 +
arch/powerpc/include/asm/exception-64s.h | 110 ++++++++---
arch/powerpc/include/asm/mce.h | 190 ++++++++++++++++++++
arch/powerpc/kernel/Makefile | 3
arch/powerpc/kernel/cpu_setup_power.S | 39 +++-
arch/powerpc/kernel/cputable.c | 16 ++
arch/powerpc/kernel/exceptions-64s.S | 50 +++++
arch/powerpc/kernel/mce.c | 179 +++++++++++++++++++
arch/powerpc/kernel/mce_power.c | 287 ++++++++++++++++++++++++++++++
arch/powerpc/kernel/traps.c | 15 ++
arch/powerpc/kvm/book3s_hv_ras.c | 42 +---
arch/powerpc/platforms/powernv/opal.c | 84 ++++++---
13 files changed, 935 insertions(+), 97 deletions(-)
create mode 100644 arch/powerpc/include/asm/mce.h
create mode 100644 arch/powerpc/kernel/mce.c
create mode 100644 arch/powerpc/kernel/mce_power.c
--
-Mahesh
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