From mboxrd@z Thu Jan 1 00:00:00 1970 From: Brijesh Singh Subject: [RFC PATCH v1 25/28] KVM: SVM: add KVM_SEV_GUEST_STATUS command Date: Mon, 22 Aug 2016 19:29:09 -0400 Message-ID: <147190854977.9523.2458628974170220401.stgit@brijesh-build-machine> References: <147190820782.9523.4967724730957229273.stgit@brijesh-build-machine> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <147190820782.9523.4967724730957229273.stgit@brijesh-build-machine> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: driverdev-devel-bounces@linuxdriverproject.org Sender: "devel" To: simon.guinot@sequanux.org, linux-efi@vger.kernel.org, brijesh.singh@amd.com, kvm@vger.kernel.org, rkrcmar@redhat.com, matt@codeblueprint.co.uk, linus.walleij@linaro.org, linux-mm@kvack.org, paul.gortmaker@windriver.com, hpa@zytor.com, dan.j.williams@intel.com, aarcange@redhat.com, sfr@canb.auug.org.au, andriy.shevchenko@linux.intel.com, herbert@gondor.apana.org.au, bhe@redhat.com, xemul@parallels.com, joro@8bytes.org, x86@kernel.org, mingo@redhat.com, msalter@redhat.com, ross.zwisler@linux.intel.com, bp@suse.de, dyoung@redhat.com, thomas.lendacky@amd.com, jroedel@suse.de, keescook@chromium.org, toshi.kani@hpe.com, mathieu.desnoyers@efficios.com, devel@linuxdriverproject.org, tglx@linutronix.de, mchehab@kernel.org, iamjoonsoo.kim@lge.com, labbott@fedoraproject.org, tony.luck@intel.com, alexandre.boun List-Id: linux-efi@vger.kernel.org The command is used to query the SEV guest status. For more information see [1], section 6.10 [1] http://support.amd.com/TechDocs/55766_SEV-KM%20API_Spec.pdf Signed-off-by: Brijesh Singh --- arch/x86/kvm/svm.c | 41 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index 60cc0f7..63e7d15 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -5570,6 +5570,42 @@ err_1: return ret; } +static int sev_guest_status(struct kvm *kvm, + struct kvm_sev_guest_status __user *argp, + int *psp_ret) +{ + int ret; + struct kvm_sev_guest_status params; + struct psp_data_guest_status *status; + + if (!kvm_sev_guest()) + return -ENOTTY; + + if (copy_from_user(¶ms, argp, sizeof(*argp))) + return -EFAULT; + + status = kzalloc(sizeof(*status), GFP_KERNEL); + if (!status) + return -ENOMEM; + + status->hdr.buffer_len = sizeof(*status); + status->handle = kvm_sev_handle(); + ret = psp_guest_status(status, psp_ret); + if (ret) { + printk(KERN_ERR "SEV: GUEST_STATUS ret=%d (%#010x)\n", + ret, *psp_ret); + goto err_1; + } + params.policy = status->policy; + params.state = status->state; + + if (copy_to_user(argp, ¶ms, sizeof(*argp))) + ret = -EFAULT; +err_1: + kfree(status); + return ret; +} + static int amd_sev_issue_cmd(struct kvm *kvm, struct kvm_sev_issue_cmd __user *user_data) { @@ -5595,6 +5631,11 @@ static int amd_sev_issue_cmd(struct kvm *kvm, &arg.ret_code); break; } + case KVM_SEV_GUEST_STATUS: { + r = sev_guest_status(kvm, (void *)arg.opaque, + &arg.ret_code); + break; + } default: break; }