KVM: VMX: Skip global INVVPID fallback if vpid==0 in vpid_sync_context()

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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>

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Sean Christopherson 2020-03-20 14:28:04 -07:00 • committed by Paolo Bonzini

parent ee1fa209f5

commit c746b3a4b8

1 changed files with 1 additions and 1 deletions

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arch/x86/kvm/vmx/ops.h

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