Commit d3f6248b authored by Zenghui Yu's avatar Zenghui Yu Committed by Dongxu Sun
Browse files

KVM: arm64: GICv4.1: Allow non-trapping WFI when using direct vtimer interrupt 

virt inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I8K89F


CVE: NA

------------------------------------------------------------------

It's beneficial to avoid trapping on WFI when the vcpu is using the
direct delivered vtimer interrupt.

Signed-off-by: default avatarZenghui Yu <yuzenghui@huawei.com>
Signed-off-by: default avatarKunkun Jiang <jiangkunkun@huawei.com>
Signed-off-by: default avatarDongxu Sun <sundongxu3@huawei.com>
parent f1aaf830

arch/arm64/include/asm/kvm_emulate.h

+1 −0
Original line number Diff line number Diff line
@@ -90,6 +90,7 @@ static inline void vcpu_clear_wfx_traps(struct kvm_vcpu *vcpu) 
{

	vcpu->arch.hcr_el2 &= ~HCR_TWE;

	if (atomic_read(&vcpu->arch.vgic_cpu.vgic_v3.its_vpe.vlpi_count) ||

	    vcpu->arch.vgic_cpu.vtimer_irqbypass ||

	    vcpu->kvm->arch.vgic.nassgireq)

		vcpu->arch.hcr_el2 &= ~HCR_TWI;

	else