[PATCH 0/5] Updates to AMD MCE driver per Scalable MCA spec
From: Aravind Gopalakrishnan
Date: Thu Jan 14 2016 - 17:31:03 EST
The patchset contains updates to the MCE driver based
on the Scalable MCA specification.
Patches 1-3 include some minor changes to existing code
and have been tested for regressions on older families.
Patches 4-5 is new code and only runs on processors
with ScalableMCA feature enabled (for future)
Patch 1: Order of mce_amd_feature_init() was incorrect as
it should be called after we gather features from
cpuid bits. Fixing that in this patch
Patch 2: We do not require shared bank verification on ZP.
Modifying code here to return early if we are on a processor
that supports SMCA feature.
Patch 3: The number of blocks per bank is reduced from Fam17h onwards.
Fixing code to reflect this architectural change
Patch 4: LVT offset for thresholding is now programmed in different MSR
as opposed to per-bank MISC register in earlier processors.
Fixing code here to obtain LVT offset from correct MSR.
Patch 5: OS is required to set MCAXEn bit in the per-bank CONFIG MSR
to acknowledge the use of new MSR range for MCA.
Doing that here and also creating definitions for the new
MSR range in msr-index.
Note: checkpatch generates warnings for Patch 5. But I have not
wrapped text around the character limit as it looked ugly.
(I overshot it by only a character or two)
Aravind Gopalakrishnan (5):
x86, mce: Fix order of AMD MCE init function call
x86/mcheck/AMD: Do not perform shared bank check for future processors
x86/mcheck/AMD: Reduce number of blocks scanned per bank
x86/mcheck/AMD: Fix LVT offset configuration for thresholding
x86/mcheck/AMD: Set MCAX Enable bit
arch/x86/include/asm/msr-index.h | 23 +++++++++++++++++
arch/x86/kernel/cpu/mcheck/mce.c | 2 +-
arch/x86/kernel/cpu/mcheck/mce_amd.c | 50 ++++++++++++++++++++++++++++++++++--
3 files changed, 72 insertions(+), 3 deletions(-)