KVM: arm64: Allow userspace to receive SHARE and UNSHARE notifications
Signed-off-by: Will Deacon <will@kernel.org>
diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index 75c57f8..b7ad25f 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c
@@ -60,7 +60,8 @@ static DEFINE_PER_CPU(unsigned char, kvm_arm_hardware_enabled);
DEFINE_STATIC_KEY_FALSE(userspace_irqchip_in_use);
/* KVM "vendor" hypercalls which may be forwarded to userspace on request. */
-#define KVM_EXIT_HYPERCALL_VALID_MASK (0)
+#define KVM_EXIT_HYPERCALL_VALID_MASK (BIT(ARM_SMCCC_KVM_FUNC_MEM_SHARE) | \
+ BIT(ARM_SMCCC_KVM_FUNC_MEM_UNSHARE))
int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu)
{
diff --git a/arch/arm64/kvm/hypercalls.c b/arch/arm64/kvm/hypercalls.c
index e41571f..96be983 100644
--- a/arch/arm64/kvm/hypercalls.c
+++ b/arch/arm64/kvm/hypercalls.c
@@ -151,6 +151,14 @@ int kvm_hvc_call_handler(struct kvm_vcpu *vcpu)
case ARM_SMCCC_VENDOR_HYP_KVM_PTP_FUNC_ID:
kvm_ptp_get_time(vcpu, val);
break;
+ case ARM_SMCCC_VENDOR_HYP_KVM_MEM_SHARE_FUNC_ID:
+ if (!kvm_vcpu_exit_hcall(vcpu, ARM_SMCCC_KVM_FUNC_MEM_SHARE, 3))
+ return 0;
+ break;
+ case ARM_SMCCC_VENDOR_HYP_KVM_MEM_UNSHARE_FUNC_ID:
+ if (!kvm_vcpu_exit_hcall(vcpu, ARM_SMCCC_KVM_FUNC_MEM_UNSHARE, 3))
+ return 0;
+ break;
case ARM_SMCCC_TRNG_VERSION:
case ARM_SMCCC_TRNG_FEATURES:
case ARM_SMCCC_TRNG_GET_UUID:
