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KVM: SVM: Add support for SEV GUEST_STATUS command

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The command is used for querying the SEV guest information.

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Radim Krčmář" <rkrcmar@redhat.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Borislav Petkov <bp@suse.de>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: x86@kernel.org
Cc: kvm@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Reviewed-by: Borislav Petkov <bp@suse.de>
This commit is contained in:
Brijesh Singh 2017-12-04 10:57:37 -06:00
parent 5bdb0e2fa4
commit 255d9e75e2
1 changed files with 33 additions and 0 deletions
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33
arch/x86/kvm/svm.c
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@ -6133,6 +6133,36 @@ 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_info *sev = &kvm->arch.sev_info;
struct kvm_sev_guest_status params;
struct sev_data_guest_status *data;
int ret;
if (!sev_guest(kvm))
return -ENOTTY;
data = kzalloc(sizeof(*data), GFP_KERNEL);
if (!data)
return -ENOMEM;
data->handle = sev->handle;
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 __user *)(uintptr_t)argp->data, &params, sizeof(params)))
ret = -EFAULT;
e_free:
kfree(data);
return ret;
}
static int svm_mem_enc_op(struct kvm *kvm, void __user *argp)
{
struct kvm_sev_cmd sev_cmd;
@ -6162,6 +6192,9 @@ static int svm_mem_enc_op(struct kvm *kvm, void __user *argp)
case KVM_SEV_LAUNCH_FINISH:
r = sev_launch_finish(kvm, &sev_cmd);
break;
case KVM_SEV_GUEST_STATUS:
r = sev_guest_status(kvm, &sev_cmd);
break;
default:
r = -EINVAL;
goto out;