From mboxrd@z Thu Jan 1 00:00:00 1970 From: Brijesh Singh Subject: [Part2 PATCH v5.1 12.6/31] crypto: ccp: Implement SEV_PDH_GEN ioctl command Date: Fri, 6 Oct 2017 20:06:04 -0500 Message-ID: <20171007010607.78088-6-brijesh.singh@amd.com> References: <20171004131412.13038-13-brijesh.singh@amd.com> <20171007010607.78088-1-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?= , Herbert Xu , Gary Hook , Tom Lendacky , linux-crypto@vger.kernel.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org To: bp@suse.de Return-path: In-Reply-To: <20171007010607.78088-1-brijesh.singh@amd.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-crypto.vger.kernel.org The SEV_PDH_GEN command is used to re-generate the Platform Diffie-Hellman (PDH) key. The command is defined in SEV spec section 5.9. 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 --- drivers/crypto/ccp/psp-dev.c | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/drivers/crypto/ccp/psp-dev.c b/drivers/crypto/ccp/psp-dev.c index 03d7bd03ad58..28efb7a9245a 100644 --- a/drivers/crypto/ccp/psp-dev.c +++ b/drivers/crypto/ccp/psp-dev.c @@ -271,6 +271,34 @@ static int sev_ioctl_pek_gen(struct sev_issue_cmd *argp) return ret; } +static int sev_ioctl_pdh_gen(struct sev_issue_cmd *argp) +{ + int ret, state, do_shutdown = 0; + + /* + * PDH_GEN command can be issued when platform is in INIT or WORKING + * state. If we are in UNINIT state then transition in INIT state + * before issuing the command. + */ + ret = sev_platform_get_state(&state, &argp->error); + if (ret) + return ret; + + if (state == SEV_STATE_UNINIT) { + ret = sev_firmware_init(&argp->error); + if (ret) + return ret; + do_shutdown = 1; + } + + ret = sev_handle_cmd(SEV_CMD_PDH_GEN, 0, &argp->error); + + if (do_shutdown) + sev_handle_cmd(SEV_CMD_SHUTDOWN, 0, NULL); + + return ret; +} + static long sev_ioctl(struct file *file, unsigned int ioctl, unsigned long arg) { void __user *argp = (void __user *)arg; @@ -300,6 +328,10 @@ static long sev_ioctl(struct file *file, unsigned int ioctl, unsigned long arg) ret = sev_ioctl_pek_gen(&input); break; } + case SEV_PDH_GEN: { + ret = sev_ioctl_pdh_gen(&input); + break; + } default: ret = -EINVAL; break; -- 2.9.5