diff options
| author | Sean Christopherson <sean.j.christopherson@intel.com> | 2020-03-20 14:28:04 -0700 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-04-20 17:26:06 -0400 |
| commit | c746b3a4b84cc6eb2f8a45e89210f57d252d98fd (patch) | |
| tree | 7f67f9a673e2199d87e2dad5b012a27f5207fe1b /arch/x86 | |
| parent | ee1fa209f5e5ca5c1e76c7aa1c2aab292f371f4a (diff) | |
KVM: VMX: Skip global INVVPID fallback if vpid==0 in vpid_sync_context()
Skip the global INVVPID in the unlikely scenario that vpid==0 and the
SINGLE_CONTEXT variant of INVVPID is unsupported. If vpid==0, there's
no need to INVVPID as it's impossible to do VM-Enter with VPID enabled
and vmcs.VPID==0, i.e. there can't be any TLB entries for the vCPU with
vpid==0. The fact that the SINGLE_CONTEXT variant isn't supported is
irrelevant.
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Message-Id: <20200320212833.3507-9-sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/kvm/vmx/ops.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kvm/vmx/ops.h b/arch/x86/kvm/vmx/ops.h index 19717d0a1100..a1cb6d4114dc 100644 --- a/arch/x86/kvm/vmx/ops.h +++ b/arch/x86/kvm/vmx/ops.h @@ -300,7 +300,7 @@ static inline void vpid_sync_context(int vpid) { if (cpu_has_vmx_invvpid_single()) vpid_sync_vcpu_single(vpid); - else + else if (vpid != 0) vpid_sync_vcpu_global(); } |