diff options
| author | Wei Huang <wei.huang2@amd.com> | 2020-03-21 14:38:00 -0500 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2020-03-22 11:03:47 +0100 |
| commit | 077168e241ec5a3b273652acb1e85f8bc1dc2d81 (patch) | |
| tree | d04952d6ceed16ac88321c282374cbdac6314571 /drivers/media/pci/saa7164/saa7164-encoder.c | |
| parent | d8ecca4043f2d9d89daab7915eca8c2ec6254d0f (diff) | |
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 <smita.koralahallichannabasappa@amd.com>
Signed-off-by: Smita Koralahalli Channabasappa <smita.koralahallichannabasappa@amd.com>
Signed-off-by: Wei Huang <wei.huang2@amd.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Tony Luck <tony.luck@intel.com>
Link: https://lkml.kernel.org/r/20200321193800.3666964-1-wei.huang2@amd.com
Diffstat (limited to 'drivers/media/pci/saa7164/saa7164-encoder.c')
0 files changed, 0 insertions, 0 deletions