KVM: VMX: Shadow VMCS primary execution controls

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Prepare to shadow all major control fields on a per-VMCS basis, which
allows KVM to avoid VMREADs when switching between vmcs01 and vmcs02,
and more importantly can eliminate costly VMWRITEs to controls when
preparing vmcs02.

Shadowing exec controls also saves a VMREAD when opening virtual
INTR/NMI windows, yay...

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

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This commit is contained in:

Sean Christopherson 2019-05-07 12:17:56 -07:00 • committed by Paolo Bonzini

parent c5f2c76643

commit 2183f5645a

3 changed files with 23 additions and 31 deletions

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14

arch/x86/kvm/vmx/nested.c

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38

arch/x86/kvm/vmx/vmx.c

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2

arch/x86/kvm/vmx/vmx.h

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