diff options
| author | Sean Christopherson <sean.j.christopherson@intel.com> | 2021-03-05 10:31:22 -0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-03-15 04:44:05 -0400 |
| commit | 14072e56958cc167a049d2be0aca78c733777d25 (patch) | |
| tree | 73c9e055d03dd4bf0c8eaa1feb69422a40972144 /arch/x86/kvm/vmx | |
| parent | ee36656f0ac3658e98eccc2bcea6b25a081d8ece (diff) | |
KVM: VMX: Skip additional Hyper-V TLB EPTP flushes if one fails
Skip additional EPTP flushes if one fails when processing EPTPs for
Hyper-V's paravirt TLB flushing. If _any_ flush fails, KVM falls back
to a full global flush, i.e. additional flushes are unnecessary (and
will likely fail anyways).
Continue processing the loop unless a mismatch was already detected,
e.g. to handle the case where the first flush fails and there is a
yet-to-be-detected mismatch.
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: <20210305183123.3978098-11-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/vmx')
| -rw-r--r-- | arch/x86/kvm/vmx/vmx.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c index 3792f8fa9763..4c665a8a27a4 100644 --- a/arch/x86/kvm/vmx/vmx.c +++ b/arch/x86/kvm/vmx/vmx.c @@ -528,7 +528,15 @@ static int hv_remote_flush_tlb_with_range(struct kvm *kvm, if (++nr_unique_valid_eptps == 1) kvm_vmx->hv_tlb_eptp = tmp_eptp; - ret |= hv_remote_flush_eptp(tmp_eptp, range); + if (!ret) + ret = hv_remote_flush_eptp(tmp_eptp, range); + + /* + * Stop processing EPTPs if a failure occurred and + * there is already a detected EPTP mismatch. + */ + if (ret && nr_unique_valid_eptps > 1) + break; } /* |