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KVM: X86: Provide a capability to disable PAUSE intercepts

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Allow to disable pause loop exit/pause filtering on a per VM basis.

If some VMs have dedicated host CPUs, they won't be negatively affected
due to needlessly intercepted PAUSE instructions.

Thanks to Jan H. Schönherr's initial patch.

Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Jan H. Schönherr <jschoenh@amazon.de>
Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Wanpeng Li
2018-03-12 04:53:04 -07:00
committed by Paolo Bonzini
parent caa057a2ca
commit b31c114b82
5 changed files with 27 additions and 7 deletions
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arch/x86/include/asm/kvm_host.h
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@@ -813,6 +813,7 @@ struct kvm_arch {
bool mwait_in_guest;
bool hlt_in_guest;
bool pause_in_guest;
bool ept_identity_pagetable_done;
gpa_t ept_identity_map_addr;