KVM: x86/pmu: Disable RDPMC interception for compatible mediated vPMU

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Disable RDPMC interception for vCPUs with a mediated vPMU that is
compatible with the host PMU, i.e. that doesn't require KVM emulation of
RDPMC to honor the guest's vCPU model.  With a mediated vPMU, all guest
state accessible via RDPMC is loaded into hardware while the guest is
running.

Adust RDPMC interception only for non-TDX guests, as the TDX module is
responsible for managing RDPMC intercepts based on the TD configuration.

Co-developed-by: Mingwei Zhang <mizhang@google.com>
Signed-off-by: Mingwei Zhang <mizhang@google.com>
Co-developed-by: Sandipan Das <sandipan.das@amd.com>
Signed-off-by: Sandipan Das <sandipan.das@amd.com>
Signed-off-by: Dapeng Mi <dapeng1.mi@linux.intel.com>
Tested-by: Xudong Hao <xudong.hao@intel.com>
Co-developed-by: Sean Christopherson <seanjc@google.com>
Tested-by: Manali Shukla <manali.shukla@amd.com>
Link: https://patch.msgid.link/20251206001720.468579-21-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

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This commit is contained in:

Dapeng Mi 2025-12-05 16:16:56 -08:00 • committed by Sean Christopherson

parent 1c4ba7286a

commit 8062427212

5 changed files with 40 additions and 0 deletions

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26

arch/x86/kvm/pmu.c

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1

arch/x86/kvm/pmu.h

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5

arch/x86/kvm/svm/svm.c

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7

arch/x86/kvm/vmx/vmx.c

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1

arch/x86/kvm/x86.c

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