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| author | Sean Christopherson <sean.j.christopherson@intel.com> | 2020-05-06 16:58:50 -0700 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-05-13 12:15:03 -0400 |
| commit | 1af1bb05625bcdd09522f416b62bcc72cc2fdd3b (patch) | |
| tree | 5e6c6b69869cacc8c2c3a1f7d0c1b9258dc85471 | |
| parent | 5c911beff20aa8639e7a1f28988736c13e03ed54 (diff) | |
| download | linux-1af1bb05625bcdd09522f416b62bcc72cc2fdd3b.tar.gz linux-1af1bb05625bcdd09522f416b62bcc72cc2fdd3b.tar.bz2 linux-1af1bb05625bcdd09522f416b62bcc72cc2fdd3b.zip | |
KVM: nVMX: Skip IBPB when temporarily switching between vmcs01 and vmcs02
Skip the Indirect Branch Prediction Barrier that is triggered on a VMCS
switch when temporarily loading vmcs02 to synchronize it to vmcs12, i.e.
give copy_vmcs02_to_vmcs12_rare() the same treatment as
vmx_switch_vmcs().
Make vmx_vcpu_load() static now that it's only referenced within vmx.c.
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Message-Id: <20200506235850.22600-3-sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
| -rw-r--r-- | arch/x86/kvm/vmx/nested.c | 4 | ||||
| -rw-r--r-- | arch/x86/kvm/vmx/vmx.c | 2 | ||||
| -rw-r--r-- | arch/x86/kvm/vmx/vmx.h | 1 |
3 files changed, 3 insertions, 4 deletions
diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c index 7f754b3bc6dd..b69f5a2fa362 100644 --- a/arch/x86/kvm/vmx/nested.c +++ b/arch/x86/kvm/vmx/nested.c @@ -3910,12 +3910,12 @@ static void copy_vmcs02_to_vmcs12_rare(struct kvm_vcpu *vcpu, cpu = get_cpu(); vmx->loaded_vmcs = &vmx->nested.vmcs02; - vmx_vcpu_load(&vmx->vcpu, cpu); + vmx_vcpu_load_vmcs(vcpu, cpu, &vmx->vmcs01); sync_vmcs02_to_vmcs12_rare(vcpu, vmcs12); vmx->loaded_vmcs = &vmx->vmcs01; - vmx_vcpu_load(&vmx->vcpu, cpu); + vmx_vcpu_load_vmcs(vcpu, cpu, &vmx->nested.vmcs02); put_cpu(); } diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c index db842ce74e5d..d044a05a38bd 100644 --- a/arch/x86/kvm/vmx/vmx.c +++ b/arch/x86/kvm/vmx/vmx.c @@ -1383,7 +1383,7 @@ void vmx_vcpu_load_vmcs(struct kvm_vcpu *vcpu, int cpu, * Switches to specified vcpu, until a matching vcpu_put(), but assumes * vcpu mutex is already taken. */ -void vmx_vcpu_load(struct kvm_vcpu *vcpu, int cpu) +static void vmx_vcpu_load(struct kvm_vcpu *vcpu, int cpu) { struct vcpu_vmx *vmx = to_vmx(vcpu); diff --git a/arch/x86/kvm/vmx/vmx.h b/arch/x86/kvm/vmx/vmx.h index d3d48acc6bd9..373674d455e1 100644 --- a/arch/x86/kvm/vmx/vmx.h +++ b/arch/x86/kvm/vmx/vmx.h @@ -322,7 +322,6 @@ struct kvm_vmx { bool nested_vmx_allowed(struct kvm_vcpu *vcpu); void vmx_vcpu_load_vmcs(struct kvm_vcpu *vcpu, int cpu, struct loaded_vmcs *buddy); -void vmx_vcpu_load(struct kvm_vcpu *vcpu, int cpu); int allocate_vpid(void); void free_vpid(int vpid); void vmx_set_constant_host_state(struct vcpu_vmx *vmx); |