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-rw-r--r--arch/arm64/kvm/arm.c16
1 files changed, 13 insertions, 3 deletions
diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index 4866b3f7b4ea..8b5094343f84 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c
@@ -1190,6 +1190,16 @@ int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level,
return -EINVAL;
}
+static unsigned long system_supported_vcpu_features(void)
+{
+ unsigned long features = KVM_VCPU_VALID_FEATURES;
+
+ if (!cpus_have_final_cap(ARM64_HAS_32BIT_EL1))
+ clear_bit(KVM_ARM_VCPU_EL1_32BIT, &features);
+
+ return features;
+}
+
static int kvm_vcpu_init_check_features(struct kvm_vcpu *vcpu,
const struct kvm_vcpu_init *init)
{
@@ -1204,12 +1214,12 @@ static int kvm_vcpu_init_check_features(struct kvm_vcpu *vcpu,
return -ENOENT;
}
+ if (features & ~system_supported_vcpu_features())
+ return -EINVAL;
+
if (!test_bit(KVM_ARM_VCPU_EL1_32BIT, &features))
return 0;
- if (!cpus_have_const_cap(ARM64_HAS_32BIT_EL1))
- return -EINVAL;
-
/* MTE is incompatible with AArch32 */
if (kvm_has_mte(vcpu->kvm))
return -EINVAL;