From mboxrd@z Thu Jan 1 00:00:00 1970 From: Brijesh Singh Subject: [Part2 PATCH v5 23/31] KVM: SVM: Add support for SEV GUEST_STATUS command Date: Wed, 4 Oct 2017 08:14:04 -0500 Message-ID: <20171004131412.13038-24-brijesh.singh@amd.com> References: <20171004131412.13038-1-brijesh.singh@amd.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Cc: Brijesh Singh , Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , Paolo Bonzini , =?UTF-8?q?Radim=20Kr=C4=8Dm=C3=A1=C5=99?= , Joerg Roedel , Borislav Petkov , Tom Lendacky To: x86@kernel.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org Return-path: In-Reply-To: <20171004131412.13038-1-brijesh.singh@amd.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: kvm.vger.kernel.org The command is used for querying the SEV guest information. Cc: Thomas Gleixner Cc: Ingo Molnar Cc: "H. Peter Anvin" Cc: Paolo Bonzini Cc: "Radim Krčmář" Cc: Joerg Roedel Cc: Borislav Petkov Cc: Tom Lendacky Cc: x86@kernel.org Cc: kvm@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Brijesh Singh --- arch/x86/kvm/svm.c | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index f42707fabc0a..693724c75e2d 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -6082,6 +6082,37 @@ 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, ¶ms, + sizeof(struct kvm_sev_guest_status))) + 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; @@ -6116,6 +6147,10 @@ static int svm_mem_enc_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; } -- 2.9.5