Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit eb90f341 authored by Paolo Bonzini's avatar Paolo Bonzini Committed by Radim Krčmář
Browse files

KVM: vmx: speed up TPR below threshold vmexits 



Since we're already in VCPU context, all we have to do here is recompute
the PPR value.  That will in turn generate a KVM_REQ_EVENT if necessary.

Reviewed-by: default avatarRoman Kagan <rkagan@virtuozzo.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 0f1e261e

arch/x86/kvm/lapic.c

+6 −0
Original line number Diff line number Diff line
@@ -595,6 +595,12 @@ static void apic_update_ppr(struct kvm_lapic *apic) 
	}

}



void kvm_apic_update_ppr(struct kvm_vcpu *vcpu)

{

	apic_update_ppr(vcpu->arch.apic);

}

EXPORT_SYMBOL_GPL(kvm_apic_update_ppr);



static void apic_set_tpr(struct kvm_lapic *apic, u32 tpr)

{

	kvm_lapic_set_reg(apic, APIC_TASKPRI, tpr);

arch/x86/kvm/lapic.h

+1 −0
Original line number Diff line number Diff line
@@ -73,6 +73,7 @@ bool kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source, 


void __kvm_apic_update_irr(u32 *pir, void *regs);

void kvm_apic_update_irr(struct kvm_vcpu *vcpu, u32 *pir);

void kvm_apic_update_ppr(struct kvm_vcpu *vcpu);

int kvm_apic_set_irq(struct kvm_vcpu *vcpu, struct kvm_lapic_irq *irq,

		     struct dest_map *dest_map);

int kvm_apic_local_deliver(struct kvm_lapic *apic, int lvt_type);

arch/x86/kvm/vmx.c

+1 −1
Original line number Diff line number Diff line
@@ -6152,7 +6152,7 @@ static int handle_wrmsr(struct kvm_vcpu *vcpu) 


static int handle_tpr_below_threshold(struct kvm_vcpu *vcpu)

{

	kvm_make_request(KVM_REQ_EVENT, vcpu);

	kvm_apic_update_ppr(vcpu);

	return 1;

}