x86/cpu: X86_FEATURE_INTEL_PPIN finally has a CPUID bit

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After nine generations of adding to model specific list of CPUs that
support PPIN (Protected Processor Inventory Number) Intel allocated
a CPUID bit to enumerate the MSRs.

CPUID(EAX=7, ECX=1).EBX bit 0 enumerates presence of MSR_PPIN_CTL and
MSR_PPIN. Add it to the "scattered" CPUID bits and add an entry to the
ppin_cpuids[] x86_match_cpu() array to catch Intel CPUs that implement
it.

Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lore.kernel.org/r/20220131230111.2004669-3-tony.luck@intel.com

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Tony Luck 2022-01-31 15:01:08 -08:00 • committed by Borislav Petkov

parent 0dcab41d34

commit 00a2f23eef

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arch/x86/kernel/cpu/common.c

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arch/x86/kernel/cpu/scattered.c

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