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| author | Wanpeng Li <wanpengli@tencent.com> | 2018-03-12 04:53:03 -0700 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2018-03-16 22:03:52 +0100 |
| commit | caa057a2cad647fb368a12c8e6c410ac4c28e063 (patch) | |
| tree | 704b511957703f1666b9735a516ec21c3e0865ae /arch/x86/kvm/svm.c | |
| parent | 4d5422cea3b61f158d58924cbb43feada456ba5c (diff) | |
| download | lwn-caa057a2cad647fb368a12c8e6c410ac4c28e063.tar.gz lwn-caa057a2cad647fb368a12c8e6c410ac4c28e063.zip | |
KVM: X86: Provide a capability to disable HLT intercepts
If host CPUs are dedicated to a VM, we can avoid VM exits on HLT.
This patch adds the per-VM capability to disable them.
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>
Diffstat (limited to 'arch/x86/kvm/svm.c')
| -rw-r--r-- | arch/x86/kvm/svm.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index f6578cee6bb6..0f801d82f493 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -1380,7 +1380,6 @@ static void init_vmcb(struct vcpu_svm *svm) set_intercept(svm, INTERCEPT_RDPMC); set_intercept(svm, INTERCEPT_CPUID); set_intercept(svm, INTERCEPT_INVD); - set_intercept(svm, INTERCEPT_HLT); set_intercept(svm, INTERCEPT_INVLPG); set_intercept(svm, INTERCEPT_INVLPGA); set_intercept(svm, INTERCEPT_IOIO_PROT); @@ -1403,6 +1402,9 @@ static void init_vmcb(struct vcpu_svm *svm) set_intercept(svm, INTERCEPT_MWAIT); } + if (!kvm_hlt_in_guest(svm->vcpu.kvm)) + set_intercept(svm, INTERCEPT_HLT); + control->iopm_base_pa = __sme_set(iopm_base); control->msrpm_base_pa = __sme_set(__pa(svm->msrpm)); control->int_ctl = V_INTR_MASKING_MASK; |