[PATCH v7 34/45] kvm: rme: Hide KVM_CAP_READONLY_MEM for realm guests

Steven Price
2025-02-13T16:17:18Z

For protected memory read only isn't supported. While it may be possible
to support read only for unprotected memory, this isn't supported at the
present time.

Signed-off-by: Steven Price <steven.price@arm.com>
---
arch/arm64/kvm/arm.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index 1f3674e95f03..0f1d65f87e2b 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c
@@ -348,7 +348,6 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
case KVM_CAP_ONE_REG:
case KVM_CAP_ARM_PSCI:
case KVM_CAP_ARM_PSCI_0_2:
- case KVM_CAP_READONLY_MEM:
case KVM_CAP_MP_STATE:
case KVM_CAP_IMMEDIATE_EXIT:
case KVM_CAP_VCPU_EVENTS:
@@ -362,6 +361,7 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
case KVM_CAP_COUNTER_OFFSET:
r = 1;
break;
+ case KVM_CAP_READONLY_MEM:
case KVM_CAP_SET_GUEST_DEBUG:
r = !kvm_is_realm(kvm);
break;
--
2.43.0