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    Subject[PATCH v5 22/23] KVM: arm64: GICv4.1: Allow non-trapping WFI when using HW SGIs
    Date
    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>
    ---
    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;
    --
    2.20.1
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