KVM: x86/pmu: Don't ignore bits 31:30 for RDPMC index on AMD

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Stop stripping bits 31:30 prior to validating/consuming the RDPMC index on
AMD.  Per the APM's documentation of RDPMC, *values* greater than 27 are
reserved.  The behavior of upper bits being flags is firmly Intel-only.

Fixes: ca724305a2 ("KVM: x86/vPMU: Implement AMD vPMU code for KVM")
Tested-by: Dapeng Mi <dapeng1.mi@linux.intel.com>
Link: https://lore.kernel.org/r/20240109230250.424295-7-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

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Sean Christopherson 2024-01-09 15:02:26 -08:00

parent 7a277c2241

commit ecb490770a

1 changed files with 1 additions and 3 deletions

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arch/x86/kvm/svm/pmu.c

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