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KVM: SVM: Clean up handling of LBR virtualization enabled

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Clean up the enable_lbrv computation in svm_update_lbrv() to consolidate
the logic for computing enable_lbrv into a single statement, and to remove
the coding style violations (lack of curly braces on nested if).

No functional change intended.

Link: https://lore.kernel.org/r/20230607203519.1570167-3-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Sean Christopherson
2023-06-07 13:35:18 -07:00
parent d518f8cc10
commit 41dfb5f13e
1 changed files with 4 additions and 9 deletions
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13
arch/x86/kvm/svm/svm.c
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@@ -994,15 +994,10 @@ static struct vmcb *svm_get_lbr_vmcb(struct vcpu_svm *svm)
void svm_update_lbrv(struct kvm_vcpu *vcpu)
{
struct vcpu_svm *svm = to_svm(vcpu);
bool enable_lbrv = svm_get_lbr_vmcb(svm)->save.dbgctl & DEBUGCTLMSR_LBR;
bool current_enable_lbrv = !!(svm->vmcb->control.virt_ext &
LBR_CTL_ENABLE_MASK);
if (unlikely(is_guest_mode(vcpu) && svm->lbrv_enabled))
if (unlikely(svm->nested.ctl.virt_ext & LBR_CTL_ENABLE_MASK))
enable_lbrv = true;
bool current_enable_lbrv = svm->vmcb->control.virt_ext & LBR_CTL_ENABLE_MASK;
bool enable_lbrv = (svm_get_lbr_vmcb(svm)->save.dbgctl & DEBUGCTLMSR_LBR) ||
(is_guest_mode(vcpu) && svm->lbrv_enabled &&
(svm->nested.ctl.virt_ext & LBR_CTL_ENABLE_MASK));
if (enable_lbrv == current_enable_lbrv)
return;