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| author | Sean Christopherson <sean.j.christopherson@intel.com> | 2021-03-05 21:31:14 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-03-15 11:43:57 +0300 |
| commit | a4038ef1aa63a140f8ba062257febe4e5bbb9448 (patch) | |
| tree | a82d36f7a5357b0bb6e0cd60e3d0171c9b53b587 /arch/x86/kvm/vmx/vmx.h | |
| parent | e83bc09caf1671ec1c14621668cde2816902e2ea (diff) | |
| download | linux-a4038ef1aa63a140f8ba062257febe4e5bbb9448.tar.xz | |
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/x86/kvm/vmx/vmx.h')
| -rw-r--r-- | arch/x86/kvm/vmx/vmx.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/kvm/vmx/vmx.h b/arch/x86/kvm/vmx/vmx.h index 4795955490cb..f846cf3a5d25 100644 --- a/arch/x86/kvm/vmx/vmx.h +++ b/arch/x86/kvm/vmx/vmx.h @@ -351,6 +351,7 @@ struct kvm_vmx { bool ept_identity_pagetable_done; gpa_t ept_identity_map_addr; + hpa_t hv_tlb_eptp; enum ept_pointers_status ept_pointers_match; spinlock_t ept_pointer_lock; }; |