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author | Sean Christopherson <sean.j.christopherson@intel.com> | 2021-03-05 10:31:14 -0800 |
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committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-03-15 04:43:57 -0400 |
commit | a4038ef1aa63a140f8ba062257febe4e5bbb9448 (patch) | |
tree | a82d36f7a5357b0bb6e0cd60e3d0171c9b53b587 /arch/um | |
parent | e83bc09caf1671ec1c14621668cde2816902e2ea (diff) | |
download | linux-a4038ef1aa63a140f8ba062257febe4e5bbb9448.tar.gz |
KVM: VMX: Track common EPTP for Hyper-V's paravirt TLB flush
Explicitly track the EPTP that is common to all vCPUs instead of grabbing vCPU0's EPTP when invoking Hyper-V's paravirt TLB flush. Tracking the EPTP will allow optimizing the checks when loading a new EPTP and will also allow dropping ept_pointer_match, e.g. by marking the common EPTP as invalid. This also technically fixes a bug where KVM could theoretically flush an invalid GPA if all vCPUs have an invalid root. In practice, it's likely impossible to trigger a remote TLB flush in such a scenario. In any case, the superfluous flush is completely benign. Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com> Signed-off-by: Sean Christopherson <seanjc@google.com> Message-Id: <20210305183123.3978098-3-seanjc@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/um')
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