Since we're (almost) feature complete, let's allow userspace to
request KVM_ARM_VCPU_EL2* by bumping KVM_VCPU_MAX_FEATURES up.
We also now advertise the features to userspace with a new capabilities.
It's going to be great...
Signed-off-by: Marc Zyngier <maz@xxxxxxxxxx>
---
arch/arm64/include/asm/kvm_host.h | 2 +-
arch/arm64/kvm/arm.c | 6 ++++++
include/uapi/linux/kvm.h | 2 ++
3 files changed, 9 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index 7cfa024de4e34..2a9ab9abf0f81 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -39,7 +39,7 @@
#define KVM_MAX_VCPUS VGIC_V3_MAX_CPUS
-#define KVM_VCPU_MAX_FEATURES 7
+#define KVM_VCPU_MAX_FEATURES 9
#define KVM_VCPU_VALID_FEATURES (BIT(KVM_VCPU_MAX_FEATURES) - 1)
#define KVM_REQ_SLEEP \
diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index 4746c6cace2a8..6554379cdcada 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c
@@ -359,6 +359,12 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
case KVM_CAP_ARM_EL1_32BIT:
r = cpus_have_final_cap(ARM64_HAS_32BIT_EL1);
break;
+ case KVM_CAP_ARM_EL2:
+ r = cpus_have_final_cap(ARM64_HAS_NESTED_VIRT);
+ break;
+ case KVM_CAP_ARM_EL2_E2H0:
+ r = cpus_have_final_cap(ARM64_HAS_HCR_NV1);
+ break;
case KVM_CAP_GUEST_DEBUG_HW_BPS:
r = get_num_brps();
break;
diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
index 45e6d8fca9b99..9a6674f51b8be 100644
--- a/include/uapi/linux/kvm.h
+++ b/include/uapi/linux/kvm.h
@@ -929,6 +929,8 @@ struct kvm_enable_cap {
#define KVM_CAP_PRE_FAULT_MEMORY 236
#define KVM_CAP_X86_APIC_BUS_CYCLES_NS 237
#define KVM_CAP_X86_GUEST_MODE 238
+#define KVM_CAP_ARM_EL2 239
+#define KVM_CAP_ARM_EL2_E2H0 240
struct kvm_irq_routing_irqchip {
__u32 irqchip;
--
2.39.2
