From mboxrd@z Thu Jan 1 00:00:00 1970 From: Brijesh Singh Subject: [RFC Part2 PATCH v3 19/26] KVM: svm: Add support for SEV GUEST_STATUS command Date: Mon, 24 Jul 2017 15:02:56 -0500 Message-ID: <20170724200303.12197-20-brijesh.singh@amd.com> References: <20170724200303.12197-1-brijesh.singh@amd.com> Mime-Version: 1.0 Content-Type: text/plain Cc: Thomas Gleixner , Borislav Petkov , Joerg Roedel , "Michael S . Tsirkin" , Paolo Bonzini , =?UTF-8?q?=5C=22Radim=20Kr=C4=8Dm=C3=A1=C5=99=5C=22?= , Tom Lendacky , Brijesh Singh To: linux-kernel@vger.kernel.org, x86@kernel.org, kvm@vger.kernel.org Return-path: Received: from mail-by2nam01on0070.outbound.protection.outlook.com ([104.47.34.70]:17488 "EHLO NAM01-BY2-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753936AbdGXUHQ (ORCPT ); Mon, 24 Jul 2017 16:07:16 -0400 In-Reply-To: <20170724200303.12197-1-brijesh.singh@amd.com> Sender: kvm-owner@vger.kernel.org List-ID: The command is used for querying the SEV guest status. Signed-off-by: Brijesh Singh --- 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(¶ms, (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, ¶ms, + 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