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| author | Wei Huang <[email protected]> | 2020-03-21 19:38:00 +0000 |
|---|---|---|
| committer | Borislav Petkov <[email protected]> | 2020-03-22 10:03:47 +0000 |
| commit | 077168e241ec5a3b273652acb1e85f8bc1dc2d81 (patch) | |
| tree | d04952d6ceed16ac88321c282374cbdac6314571 /drivers/pci/controller/pci-host-generic.c | |
| parent | x86/mce/dev-mcelog: Dynamically allocate space for machine check records (diff) | |
| download | kernel-077168e241ec5a3b273652acb1e85f8bc1dc2d81.tar.gz kernel-077168e241ec5a3b273652acb1e85f8bc1dc2d81.zip | |
x86/mce/amd: Add PPIN support for AMD MCE
Newer AMD CPUs support a feature called protected processor
identification number (PPIN). This feature can be detected via
CPUID_Fn80000008_EBX[23].
However, CPUID alone is not enough to read the processor identification
number - MSR_AMD_PPIN_CTL also needs to be configured properly. If, for
any reason, MSR_AMD_PPIN_CTL[PPIN_EN] can not be turned on, such as
disabled in BIOS, the CPU capability bit X86_FEATURE_AMD_PPIN needs to
be cleared.
When the X86_FEATURE_AMD_PPIN capability is available, the
identification number is issued together with the MCE error info in
order to keep track of the source of MCE errors.
[ bp: Massage. ]
Co-developed-by: Smita Koralahalli Channabasappa <[email protected]>
Signed-off-by: Smita Koralahalli Channabasappa <[email protected]>
Signed-off-by: Wei Huang <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Acked-by: Tony Luck <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]
Diffstat (limited to 'drivers/pci/controller/pci-host-generic.c')
0 files changed, 0 insertions, 0 deletions