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Subject[RFC PATCH v2 28/32] kvm: svm: Add support for SEV GUEST_STATUS command
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The command is used for querying the SEV guest status.

Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
arch/x86/kvm/svm.c | 37 +++++++++++++++++++++++++++++++++++++
1 file changed, 37 insertions(+)

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index c108064..977aa22 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -5953,6 +5953,39 @@ 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)
+{
+ int ret;
+ struct kvm_sev_guest_status params;
+ struct sev_data_guest_status *data;
+
+ 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 err_1;
+
+ params.policy = data->policy;
+ params.state = data->state;
+
+ if (copy_to_user((void *) argp->data, &params,
+ sizeof(struct kvm_sev_guest_status)))
+ ret = -EFAULT;
+err_1:
+ kfree(data);
+ return ret;
+}
+
static int amd_memory_encryption_cmd(struct kvm *kvm, void __user *argp)
{
int r = -ENOTTY;
@@ -5976,6 +6009,10 @@ static int amd_memory_encryption_cmd(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;
}
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