KVM: x86/pmu: Apply "fast" RDPMC only to Intel PMUs

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Move the handling of "fast" RDPMC instructions, which drop bits 63:32 of
the count, to Intel.  The "fast" flag, and all modifiers for that matter,
are Intel-only and aren't supported by AMD.

Opportunistically replace open coded bit crud with proper #defines, and
add comments to try and disentangle the flags vs. values mess for
non-architectural vs. architectural PMUs.

Fixes: ca724305a2 ("KVM: x86/vPMU: Implement AMD vPMU code for KVM")
Reviewed-by: Dapeng Mi <dapeng1.mi@linux.intel.com>
Tested-by: Dapeng Mi <dapeng1.mi@linux.intel.com>
Link: https://lore.kernel.org/r/20240109230250.424295-9-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

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This commit is contained in:

Sean Christopherson 2024-01-09 15:02:28 -08:00

parent 7bb7fce136

commit d652981db0

2 changed files with 15 additions and 4 deletions

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3

arch/x86/kvm/pmu.c

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16

arch/x86/kvm/vmx/pmu_intel.c

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