KVM: VMX: Allow toggling bits in MSR_IA32_RTIT_CTL when enable bit is cleared

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Allow toggling other bits in MSR_IA32_RTIT_CTL if the enable bit is being
cleared, the existing logic simply ignores the enable bit.  E.g. KVM will
incorrectly reject a write of '0' to stop tracing.

Fixes: bf8c55d8dc ("KVM: x86: Implement Intel PT MSRs read/write emulation")
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
[sean: rework changelog, drop stable@]
Reviewed-by: Xiaoyao Li <xiaoyao.li@intel.com>
Link: https://lore.kernel.org/r/20241101185031.1799556-3-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

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Adrian Hunter 2024-11-01 11:50:31 -07:00 • committed by Sean Christopherson

parent 04bc93cf49

commit fdd2db5126

1 changed files with 2 additions and 1 deletions

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arch/x86/kvm/vmx/vmx.c

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