From: Brijesh Singh Subject: [Part2 PATCH v6.1 16/38] crypto: ccp: Implement SEV_PEK_GEN ioctl command Date: Mon, 23 Oct 2017 16:55:19 -0500 Message-ID: <20171023215519.32512-1-brijesh.singh@amd.com> References: <20171020023413.122280-17-brijesh.singh@amd.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Cc: 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, kvm@vger.kernel.org, linux-kernel@vger.kernel.org To: Borislav Petkov Return-path: Received: from mail-by2nam01on0078.outbound.protection.outlook.com ([104.47.34.78]:62941 "EHLO NAM01-BY2-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S932206AbdJWVze (ORCPT ); Mon, 23 Oct 2017 17:55:34 -0400 In-Reply-To: <20171020023413.122280-17-brijesh.singh@amd.com> Sender: linux-crypto-owner@vger.kernel.org List-ID: The SEV_PEK_GEN command is used to generate a new Platform Endorsement Key (PEK). The command is defined in SEV spec section 5.6. 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 Signed-off-by: Brijesh Singh --- Changes since v6: * when sev_do_cmd() and sev_platform_shutdown() fails then propogate the error status code from sev_do_cmd() because it can give us much better reason for the failure. drivers/crypto/ccp/psp-dev.c | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) diff --git a/drivers/crypto/ccp/psp-dev.c b/drivers/crypto/ccp/psp-dev.c index dd4bab143de9..18e2d8291997 100644 --- a/drivers/crypto/ccp/psp-dev.c +++ b/drivers/crypto/ccp/psp-dev.c @@ -195,6 +195,34 @@ static int sev_ioctl_do_platform_status(struct sev_issue_cmd *argp) return ret; } +static int sev_ioctl_do_pek_pdh_gen(int cmd, struct sev_issue_cmd *argp) +{ + int ret, err; + + ret = sev_platform_init(NULL, &argp->error); + if (ret) + return ret; + + ret = sev_do_cmd(cmd, 0, &argp->error); + + if (sev_platform_shutdown(&err)) { + /* + * If both sev_do_cmd() and sev_platform_shutdown() commands + * failed then propogate the error code from the sev_do_cmd() + * because it contains a useful status code for the command + * failure. + */ + if (ret) + goto done; + + argp->error = err; + ret = -EIO; + } + +done: + return ret; +} + static long sev_ioctl(struct file *file, unsigned int ioctl, unsigned long arg) { void __user *argp = (void __user *)arg; @@ -218,6 +246,9 @@ static long sev_ioctl(struct file *file, unsigned int ioctl, unsigned long arg) case SEV_PLATFORM_STATUS: ret = sev_ioctl_do_platform_status(&input); break; + case SEV_PEK_GEN: + ret = sev_ioctl_do_pek_pdh_gen(SEV_CMD_PEK_GEN, &input); + break; default: ret = -EINVAL; goto out; -- 2.9.5