KVM: vmx: skip VMWRITE of HOST_{FS,GS}_BASE when possible

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The host's FS.base and GS.base rarely change, e.g. ~0.1% of host/guest
swaps on my system.  Cache the last value written to the VMCS and skip
the VMWRITE to the associated VMCS fields when loading host state if
the value hasn't changed since the last VMWRITE.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Sean Christopherson 2018-07-23 12:32:50 -07:00 • committed by Paolo Bonzini

parent 8f21a0bbf3

commit 5e079c7ece

1 changed files with 10 additions and 3 deletions

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arch/x86/kvm/vmx.c

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