Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 255d9e75 authored by Brijesh Singh's avatar Brijesh Singh
Browse files

KVM: SVM: Add support for SEV GUEST_STATUS command 



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: default avatarBrijesh Singh <brijesh.singh@amd.com>
Reviewed-by: default avatarBorislav Petkov <bp@suse.de>
parent 5bdb0e2f

arch/x86/kvm/svm.c

+33 −0
Original line number Diff line number Diff line
@@ -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;