From: wanghaibin wanghaibin.wang@huawei.com
virt inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I8K89F CVE: NA
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HiSilicon implementation of GICv4.1 has provided direct injection capability of vtimer interrupts. Inform users about the capability by vgic_global's has_direct_vtimer, which depends on the HW-capability from gic_kvm_info and kernel command "kvm-arm.vgic_v4_enable=1".
Signed-off-by: wanghaibin wanghaibin.wang@huawei.com Signed-off-by: Zenghui Yu yuzenghui@huawei.com Signed-off-by: Kunkun Jiang jiangkunkun@huawei.com Signed-off-by: Dongxu Sun sundongxu3@huawei.com --- arch/arm64/kvm/vgic/vgic-v3.c | 4 ++++ include/kvm/arm_vgic.h | 14 ++++++++++++++ 2 files changed, 18 insertions(+)
diff --git a/arch/arm64/kvm/vgic/vgic-v3.c b/arch/arm64/kvm/vgic/vgic-v3.c index bc6ecf4abe58..3d21c262a621 100644 --- a/arch/arm64/kvm/vgic/vgic-v3.c +++ b/arch/arm64/kvm/vgic/vgic-v3.c @@ -655,6 +655,10 @@ int vgic_v3_probe(const struct gic_kvm_info *info) kvm_info("GICv4%s support %sabled\n", kvm_vgic_global_state.has_gicv4_1 ? ".1" : "", gicv4_enable ? "en" : "dis"); + + kvm_vgic_global_state.has_direct_vtimer = info->has_vtimer && gicv4_enable; + if (kvm_vgic_global_state.has_direct_vtimer) + kvm_info("vtimer-irqbypass support enabled at GIC level\n"); }
if (!info->vcpu.start) { diff --git a/include/kvm/arm_vgic.h b/include/kvm/arm_vgic.h index c82c9c76e000..5871ea349fad 100644 --- a/include/kvm/arm_vgic.h +++ b/include/kvm/arm_vgic.h @@ -75,6 +75,12 @@ struct vgic_global { bool has_gicv4; bool has_gicv4_1;
+ /* + * Hardware (HiSilicon implementation) has vtimer interrupt + * direct injection support? + */ + bool has_direct_vtimer; + /* GIC system register CPU interface */ struct static_key_false gicv3_cpuif;
@@ -383,6 +389,14 @@ void kvm_vgic_reset_mapped_irq(struct kvm_vcpu *vcpu, u32 vintid);
void vgic_v3_dispatch_sgi(struct kvm_vcpu *vcpu, u64 reg, bool allow_group1);
+/** + * kvm_vgic_vtimer_irqbypass_support - Get the vtimer irqbypass HW capability + */ +static inline bool kvm_vgic_vtimer_irqbypass_support(void) +{ + return kvm_vgic_global_state.has_direct_vtimer; +} + /** * kvm_vgic_get_max_vcpus - Get the maximum number of VCPUs allowed by HW *