From: Brijesh Singh Subject: [Part2 PATCH v8 15/38] crypto: ccp: Implement SEV_PLATFORM_STATUS ioctl command Date: Mon, 6 Nov 2017 12:11:07 -0600 Message-ID: <20171106181130.68491-16-brijesh.singh@amd.com> References: <20171106181130.68491-1-brijesh.singh@amd.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Cc: bp@alien8.de, Brijesh Singh , Paolo Bonzini , =?UTF-8?q?Radim=20Kr=C4=8Dm=C3=A1=C5=99?= , Borislav Petkov , Herbert Xu , Gary Hook , Tom Lendacky , linux-crypto@vger.kernel.org To: kvm@vger.kernel.org, linux-kernel@vger.kernel.org Return-path: In-Reply-To: <20171106181130.68491-1-brijesh.singh@amd.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-crypto.vger.kernel.org The SEV_PLATFORM_STATUS command can be used by the platform owner to get the current status of the platform. The command is defined in SEV spec section 5.5. Cc: Paolo Bonzini Cc: "Radim Krčmář" Cc: Borislav Petkov Cc: Herbert Xu Cc: Gary Hook Cc: Tom Lendacky Cc: linux-crypto@vger.kernel.org Cc: kvm@vger.kernel.org Cc: linux-kernel@vger.kernel.org Improvements-by: Borislav Petkov Signed-off-by: Brijesh Singh Reviewed-by: Borislav Petkov Acked-by: Gary R Hook --- drivers/crypto/ccp/psp-dev.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/drivers/crypto/ccp/psp-dev.c b/drivers/crypto/ccp/psp-dev.c index b49583a45a55..a5072b166ab8 100644 --- a/drivers/crypto/ccp/psp-dev.c +++ b/drivers/crypto/ccp/psp-dev.c @@ -274,6 +274,21 @@ static int sev_ioctl_do_reset(struct sev_issue_cmd *argp) return __sev_do_cmd_locked(SEV_CMD_FACTORY_RESET, 0, &argp->error); } +static int sev_ioctl_do_platform_status(struct sev_issue_cmd *argp) +{ + struct sev_user_data_status *data = &psp_master->status_cmd_buf; + int ret; + + ret = __sev_do_cmd_locked(SEV_CMD_PLATFORM_STATUS, data, &argp->error); + if (ret) + return ret; + + if (copy_to_user((void __user *)argp->data, data, sizeof(*data))) + ret = -EFAULT; + + return ret; +} + static long sev_ioctl(struct file *file, unsigned int ioctl, unsigned long arg) { void __user *argp = (void __user *)arg; @@ -299,6 +314,9 @@ static long sev_ioctl(struct file *file, unsigned int ioctl, unsigned long arg) case SEV_FACTORY_RESET: ret = sev_ioctl_do_reset(&input); break; + case SEV_PLATFORM_STATUS: + ret = sev_ioctl_do_platform_status(&input); + break; default: ret = -EINVAL; goto out; -- 2.9.5