KVM: VMX: Add helper to check reserved bits in IA32_PERF_GLOBAL_CTRL

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Create a helper function to check the validity of a proposed value for
IA32_PERF_GLOBAL_CTRL from the existing check in intel_pmu_set_msr().

Per Intel's SDM, the reserved bits in IA32_PERF_GLOBAL_CTRL must be
cleared for the corresponding host/guest state fields.

Suggested-by: Jim Mattson <jmattson@google.com>
Co-developed-by: Krish Sadhukhan <krish.sadhukhan@oracle.com>
Signed-off-by: Krish Sadhukhan <krish.sadhukhan@oracle.com>
Signed-off-by: Oliver Upton <oupton@google.com>
Reviewed-by: Jim Mattson <jmattson@google.com>
Reviewed-by: Peter Shier <pshier@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Oliver Upton 2019-11-13 16:17:15 -08:00 • committed by Paolo Bonzini

parent f245eeaddc

commit 9477f4449b

2 changed files with 7 additions and 1 deletions

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6

arch/x86/kvm/pmu.h

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2

arch/x86/kvm/vmx/pmu_intel.c

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