xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

KVM: nVMX: Skip IBPB when temporarily switching between vmcs01 and vmcs02

Browse Source 
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>
This commit is contained in:
Sean Christopherson
2020-05-06 16:58:50 -07:00
committed by Paolo Bonzini
parent 5c911beff2
commit 1af1bb0562
3 changed files with 3 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
arch/x86/kvm/vmx/nested.c
View File

@@ -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();
}