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Subject[RFC Part2 PATCH v3 19/26] KVM: svm: Add support for SEV GUEST_STATUS command
Date
The command is used for querying the SEV guest status.

Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
arch/x86/kvm/svm.c | 38 ++++++++++++++++++++++++++++++++++++++
1 file changed, 38 insertions(+)

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 7a77197..21f85e1 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -6024,6 +6024,40 @@ static int sev_launch_finish(struct kvm *kvm, struct kvm_sev_cmd *argp)
return ret;
}

+static int sev_guest_status(struct kvm *kvm, struct kvm_sev_cmd *argp)
+{
+ struct kvm_sev_guest_status params;
+ struct sev_data_guest_status *data;
+ int ret;
+
+ if (!sev_guest(kvm))
+ return -ENOTTY;
+
+ if (copy_from_user(&params, (void *) argp->data,
+ sizeof(struct kvm_sev_guest_status)))
+ return -EFAULT;
+
+ data = kzalloc(sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ data->handle = sev_get_handle(kvm);
+ ret = sev_issue_cmd(kvm, SEV_CMD_GUEST_STATUS, data, &argp->error);
+ if (ret)
+ goto e_free;
+
+ params.policy = data->policy;
+ params.state = data->state;
+ params.handle = data->handle;
+
+ if (copy_to_user((void *) argp->data, &params,
+ sizeof(struct kvm_sev_guest_status)))
+ ret = -EFAULT;
+e_free:
+ kfree(data);
+ return ret;
+}
+
static int svm_memory_encryption_op(struct kvm *kvm, void __user *argp)
{
struct kvm_sev_cmd sev_cmd;
@@ -6055,6 +6089,10 @@ static int svm_memory_encryption_op(struct kvm *kvm, void __user *argp)
r = sev_launch_finish(kvm, &sev_cmd);
break;
}
+ case KVM_SEV_GUEST_STATUS: {
+ r = sev_guest_status(kvm, &sev_cmd);
+ break;
+ }
default:
break;
}
--
2.9.4
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