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KVM: arm64: gic-v5: Introduce kvm_arm_vgic_v5_ops and register them

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Only the KVM_DEV_ARM_VGIC_GRP_CTRL->KVM_DEV_ARM_VGIC_CTRL_INIT op is
currently supported. All other ops are stubbed out.

Co-authored-by: Timothy Hayes <timothy.hayes@arm.com>
Signed-off-by: Timothy Hayes <timothy.hayes@arm.com>
Signed-off-by: Sascha Bischoff <sascha.bischoff@arm.com>
Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>
Link: https://patch.msgid.link/20260319154937.3619520-36-sascha.bischoff@arm.com
Signed-off-by: Marc Zyngier <maz@kernel.org>
This commit is contained in:
Sascha Bischoff 2026-03-19 15:58:48 +00:00 committed by Marc Zyngier
parent 61d4ad5183
commit 37a2529468
2 changed files with 75 additions and 0 deletions
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74
arch/arm64/kvm/vgic/vgic-kvm-device.c
View File

@ -336,6 +336,10 @@ int kvm_register_vgic_device(unsigned long type)
break;
ret = kvm_vgic_register_its_device();
break;
case KVM_DEV_TYPE_ARM_VGIC_V5:
ret = kvm_register_device_ops(&kvm_arm_vgic_v5_ops,
KVM_DEV_TYPE_ARM_VGIC_V5);
break;
}
return ret;
@ -715,3 +719,73 @@ struct kvm_device_ops kvm_arm_vgic_v3_ops = {
.get_attr = vgic_v3_get_attr,
.has_attr = vgic_v3_has_attr,
};
static int vgic_v5_set_attr(struct kvm_device *dev,
struct kvm_device_attr *attr)
{
switch (attr->group) {
case KVM_DEV_ARM_VGIC_GRP_ADDR:
case KVM_DEV_ARM_VGIC_GRP_CPU_SYSREGS:
case KVM_DEV_ARM_VGIC_GRP_NR_IRQS:
return -ENXIO;
case KVM_DEV_ARM_VGIC_GRP_CTRL:
switch (attr->attr) {
case KVM_DEV_ARM_VGIC_CTRL_INIT:
return vgic_set_common_attr(dev, attr);
default:
return -ENXIO;
}
default:
return -ENXIO;
}
}
static int vgic_v5_get_attr(struct kvm_device *dev,
struct kvm_device_attr *attr)
{
switch (attr->group) {
case KVM_DEV_ARM_VGIC_GRP_ADDR:
case KVM_DEV_ARM_VGIC_GRP_CPU_SYSREGS:
case KVM_DEV_ARM_VGIC_GRP_NR_IRQS:
return -ENXIO;
case KVM_DEV_ARM_VGIC_GRP_CTRL:
switch (attr->attr) {
case KVM_DEV_ARM_VGIC_CTRL_INIT:
return vgic_get_common_attr(dev, attr);
default:
return -ENXIO;
}
default:
return -ENXIO;
}
}
static int vgic_v5_has_attr(struct kvm_device *dev,
struct kvm_device_attr *attr)
{
switch (attr->group) {
case KVM_DEV_ARM_VGIC_GRP_ADDR:
case KVM_DEV_ARM_VGIC_GRP_CPU_SYSREGS:
case KVM_DEV_ARM_VGIC_GRP_NR_IRQS:
return -ENXIO;
case KVM_DEV_ARM_VGIC_GRP_CTRL:
switch (attr->attr) {
case KVM_DEV_ARM_VGIC_CTRL_INIT:
return 0;
default:
return -ENXIO;
}
default:
return -ENXIO;
}
}
struct kvm_device_ops kvm_arm_vgic_v5_ops = {
.name = "kvm-arm-vgic-v5",
.create = vgic_create,
.destroy = vgic_destroy,
.set_attr = vgic_v5_set_attr,
.get_attr = vgic_v5_get_attr,
.has_attr = vgic_v5_has_attr,
};

1
include/linux/kvm_host.h
View File

@ -2366,6 +2366,7 @@ void kvm_unregister_device_ops(u32 type);
extern struct kvm_device_ops kvm_mpic_ops;
extern struct kvm_device_ops kvm_arm_vgic_v2_ops;
extern struct kvm_device_ops kvm_arm_vgic_v3_ops;
extern struct kvm_device_ops kvm_arm_vgic_v5_ops;
#ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT