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KVM: nVMX: Drop manual vmcs01.GUEST_INTERRUPT_STATUS.RVI check at VM-Enter

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Drop the manual check for a pending IRQ in vmcs01's RVI field during
nested VM-Enter, as the recently added call to kvm_apic_has_interrupt()
when checking for pending events after successful VM-Enter is a superset
of the RVI check (IRQs that are pending in RVI are also pending in L1's
IRR).

Link: https://lore.kernel.org/r/20241101191447.1807602-4-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Sean Christopherson 2024-11-01 12:14:45 -07:00
parent 4f09ebd0c8
commit b2868b55cf
1 changed files with 0 additions and 10 deletions
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10
arch/x86/kvm/vmx/nested.c
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@ -3481,14 +3481,6 @@ static int nested_vmx_check_permission(struct kvm_vcpu *vcpu)
return 1;
}
static u8 vmx_has_apicv_interrupt(struct kvm_vcpu *vcpu)
{
u8 rvi = vmx_get_rvi();
u8 vppr = kvm_lapic_get_reg(vcpu->arch.apic, APIC_PROCPRI);
return ((rvi & 0xf0) > (vppr & 0xf0));
}
static void load_vmcs12_host_state(struct kvm_vcpu *vcpu,
struct vmcs12 *vmcs12);
@ -3529,8 +3521,6 @@ enum nvmx_vmentry_status nested_vmx_enter_non_root_mode(struct kvm_vcpu *vcpu,
evaluate_pending_interrupts = exec_controls_get(vmx) &
(CPU_BASED_INTR_WINDOW_EXITING | CPU_BASED_NMI_WINDOW_EXITING);
if (likely(!evaluate_pending_interrupts) && kvm_vcpu_apicv_active(vcpu))
evaluate_pending_interrupts |= vmx_has_apicv_interrupt(vcpu);
if (!vmx->nested.nested_run_pending ||
!(vmcs12->vm_entry_controls & VM_ENTRY_LOAD_DEBUG_CONTROLS))