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| author | Sean Christopherson <seanjc@google.com> | 2022-06-11 00:57:51 +0000 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2022-06-20 11:49:35 -0400 |
| commit | 5d4283df5a0fc8299fba9443c33d219939eccc2d (patch) | |
| tree | 06dbedf6745666a1f86bb32be212ad40c8084a8a /arch/x86/kvm/vmx/pmu_intel.c | |
| parent | 0f4a7185270c4879fa40b33d7e07b6ac38353b34 (diff) | |
| download | lwn-5d4283df5a0fc8299fba9443c33d219939eccc2d.tar.gz lwn-5d4283df5a0fc8299fba9443c33d219939eccc2d.zip | |
Revert "KVM: x86/pmu: Accept 0 for absent PMU MSRs when host-initiated if !enable_pmu"
Eating reads and writes to all "PMU" MSRs when there is no PMU is wildly
broken as it results in allowing accesses to _any_ MSR on Intel CPUs
as intel_is_valid_msr() returns true for all host_initiated accesses.
A revert of commit d1c88a402056 ("KVM: x86: always allow host-initiated
writes to PMU MSRs") will soon follow.
This reverts commit 8e6a58e28b34e8d247e772159b8fa8f6bae39192.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20220611005755.753273-4-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/vmx/pmu_intel.c')
0 files changed, 0 insertions, 0 deletions