lkml.org 
[lkml]   [2024]   [Apr]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v2 43/43] KVM: arm64: Allow activating realms
Date
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@arm.com>
---
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 93aab6caddf5..5901d57ca9d0 100644
--- a/arch/arm64/kvm/rme.c
+++ b/arch/arm64/kvm/rme.c
@@ -1167,6 +1167,20 @@ static int kvm_init_ipa_range_realm(struct kvm *kvm,
return ret;
}

+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;
@@ -1314,6 +1328,9 @@ 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;
@@ -1567,7 +1584,7 @@ int kvm_init_rme(void)
if (ret)
return ret;

- /* Future patch will enable static branch kvm_rme_is_available */
+ static_branch_enable(&kvm_rme_is_available);

return 0;
}
--
2.34.1

\
 
 \ /
  Last update: 2024-04-12 11:01    [W:0.590 / U:0.036 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site