Add the ioctl to activate a realm and set the static branch to enable
access to the realm functionality if the RMM is detected.
Signed-off-by: Steven Price <steven.price@xxxxxxx>
---
arch/arm64/kvm/rme.c | 19 ++++++++++++++++++-
1 file changed, 18 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/kvm/rme.c b/arch/arm64/kvm/rme.c
index 1c67d2ccdaa9..d8e0a447e0cc 100644
--- a/arch/arm64/kvm/rme.c
+++ b/arch/arm64/kvm/rme.c
@@ -1194,6 +1194,20 @@ static int kvm_init_ipa_range_realm(struct kvm *kvm,
return realm_init_ipa_state(realm, addr, end);
}
+static int kvm_activate_realm(struct kvm *kvm)
+{
+ struct realm *realm = &kvm->arch.realm;
+
+ if (kvm_realm_state(kvm) != REALM_STATE_NEW)
+ return -EINVAL;
+
+ if (rmi_realm_activate(virt_to_phys(realm->rd)))
+ return -ENXIO;
+
+ WRITE_ONCE(realm->state, REALM_STATE_ACTIVE);
+ return 0;
+}
+
/* Protects access to rme_vmid_bitmap */
static DEFINE_SPINLOCK(rme_vmid_lock);
static unsigned long *rme_vmid_bitmap;
@@ -1343,6 +1357,9 @@ int kvm_realm_enable_cap(struct kvm *kvm, struct kvm_enable_cap *cap)
r = kvm_populate_realm(kvm, &args);
break;
}
+ case KVM_CAP_ARM_RME_ACTIVATE_REALM:
+ r = kvm_activate_realm(kvm);
+ break;
default:
r = -EINVAL;
break;
@@ -1607,5 +1624,5 @@ void kvm_init_rme(void)
if (rme_vmid_init())
return;
- /* Future patch will enable static branch kvm_rme_is_available */
+ static_branch_enable(&kvm_rme_is_available);
}
--
2.34.1
