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Date: Tue, 31 May 2022 13:54:48 -0400 From: Paolo Bonzini <pbonzini@...hat.com> To: linux-kernel@...r.kernel.org, kvm@...r.kernel.org Cc: likexu@...cent.com Subject: [PATCH 0/2] KVM: vmx, pmu: respect KVM_GET_MSR_INDEX_LIST/KVM_SET_MSR contracts Whenever an MSR is part of KVM_GET_MSR_INDEX_LIST, it has to be always settable with KVM_SET_MSR. Right now MSR_IA32_DS_AREA, MSR_ARCH_LBR_DEPTH and MSR_ARCH_LBR_CTL are not fulfilling this, resulting in selftests failures on <=Skylake processors. Fix this, and in general allow host-initiated writes of a default value for all PMU MSRs Paolo Bonzini (2): KVM: vmx, pmu: accept 0 for absent MSRs when host-initiated KVM: x86: always allow host-initiated writes to PMU MSRs arch/x86/kvm/pmu.c | 4 ++-- arch/x86/kvm/pmu.h | 4 ++-- arch/x86/kvm/svm/pmu.c | 2 +- arch/x86/kvm/vmx/pmu_intel.c | 42 +++++++++++++++++++++++++----------- arch/x86/kvm/x86.c | 10 ++++----- 5 files changed, 39 insertions(+), 23 deletions(-) -- 2.31.1
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