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    SubjectRe: [PATCH v5 22/23] KVM: arm64: GICv4.1: Allow non-trapping WFI when using HW SGIs
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    Hi Marc,

    On 2020/3/5 4:33, Marc Zyngier wrote:
    > Just like for VLPIs, it is beneficial to avoid trapping on WFI when the
    > vcpu is using the GICv4.1 SGIs.
    >
    > Add such a check to vcpu_clear_wfx_traps().
    >
    > Signed-off-by: Marc Zyngier <maz@kernel.org>

    Reviewed-by: Zenghui Yu <yuzenghui@huawei.com>


    Thanks

    > ---
    > arch/arm64/include/asm/kvm_emulate.h | 3 ++-
    > 1 file changed, 2 insertions(+), 1 deletion(-)
    >
    > diff --git a/arch/arm64/include/asm/kvm_emulate.h b/arch/arm64/include/asm/kvm_emulate.h
    > index f658dda12364..a30b4eec7cb4 100644
    > --- a/arch/arm64/include/asm/kvm_emulate.h
    > +++ b/arch/arm64/include/asm/kvm_emulate.h
    > @@ -89,7 +89,8 @@ static inline unsigned long *vcpu_hcr(struct kvm_vcpu *vcpu)
    > 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))
    > + if (atomic_read(&vcpu->arch.vgic_cpu.vgic_v3.its_vpe.vlpi_count) ||
    > + vcpu->kvm->arch.vgic.nassgireq)
    > vcpu->arch.hcr_el2 &= ~HCR_TWI;
    > else
    > vcpu->arch.hcr_el2 |= HCR_TWI;
    >

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