From patchwork Tue Sep 18 09:34:58 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Winkler, Tomas" X-Patchwork-Id: 10603959 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 001E2157B for ; Tue, 18 Sep 2018 09:38:56 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E641C2A334 for ; Tue, 18 Sep 2018 09:38:55 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id DACC92A34E; Tue, 18 Sep 2018 09:38:55 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7A0AF2A334 for ; Tue, 18 Sep 2018 09:38:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729968AbeIRPK2 (ORCPT ); Tue, 18 Sep 2018 11:10:28 -0400 Received: from mga01.intel.com ([192.55.52.88]:59400 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729915AbeIRPK1 (ORCPT ); Tue, 18 Sep 2018 11:10:27 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by fmsmga101.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 18 Sep 2018 02:38:40 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.53,389,1531810800"; d="scan'208";a="71724216" Received: from twinkler-lnx.jer.intel.com ([10.12.91.48]) by fmsmga008.fm.intel.com with ESMTP; 18 Sep 2018 02:38:37 -0700 From: Tomas Winkler To: Jarkko Sakkinen , Jason Gunthorpe Cc: Alexander Usyskin , Tadeusz Struk , linux-integrity@vger.kernel.org, linux-security-module@vger.kernel.org, linux-kernel@vger.kernel.org, Tomas Winkler Subject: [PATCH v3 19/20] tpm1: reimplement SAVESTATE using tpm_buf Date: Tue, 18 Sep 2018 12:34:58 +0300 Message-Id: <20180918093459.19165-20-tomas.winkler@intel.com> X-Mailer: git-send-email 2.14.4 In-Reply-To: <20180918093459.19165-1-tomas.winkler@intel.com> References: <20180918093459.19165-1-tomas.winkler@intel.com> Sender: owner-linux-security-module@vger.kernel.org Precedence: bulk List-ID: X-Virus-Scanned: ClamAV using ClamSMTP In tpm1_pm_suspend() function reimplement, TPM_ORD_SAVESTATE comamnd using tpm_buf. Signed-off-by: Tomas Winkler Reviewed-by: Jarkko Sakkinen Tested-by: Jarkko Sakkinen --- V3: new in the series drivers/char/tpm/tpm1-cmd.c | 22 ++++++++++++---------- 1 file changed, 12 insertions(+), 10 deletions(-) diff --git a/drivers/char/tpm/tpm1-cmd.c b/drivers/char/tpm/tpm1-cmd.c index 777b1158e1b5..c4a0bacb1378 100644 --- a/drivers/char/tpm/tpm1-cmd.c +++ b/drivers/char/tpm/tpm1-cmd.c @@ -719,12 +719,6 @@ int tpm1_auto_startup(struct tpm_chip *chip) } #define TPM_ORD_SAVESTATE 152 -#define SAVESTATE_RESULT_SIZE 10 -static const struct tpm_input_header savestate_header = { - .tag = cpu_to_be16(TPM_TAG_RQU_COMMAND), - .length = cpu_to_be32(10), - .ordinal = cpu_to_be32(TPM_ORD_SAVESTATE) -}; /* * We are about to suspend. Save the TPM state @@ -733,18 +727,22 @@ static const struct tpm_input_header savestate_header = { int tpm1_pm_suspend(struct tpm_chip *chip, u32 tpm_suspend_pcr) { u8 dummy_hash[TPM_DIGEST_SIZE] = { 0 }; - struct tpm_cmd_t cmd; - int rc, try; + struct tpm_buf buf; + unsigned int try; + int rc; + /* for buggy tpm, flush pcrs with extend to selected dummy */ if (tpm_suspend_pcr) rc = tpm1_pcr_extend(chip, tpm_suspend_pcr, dummy_hash, "extending dummy pcr before suspend"); + rc = tpm_buf_init(&buf, TPM_TAG_RQU_COMMAND, TPM_ORD_SAVESTATE); + if (rc) + return rc; /* now do the actual savestate */ for (try = 0; try < TPM_RETRY; try++) { - cmd.header.in = savestate_header; - rc = tpm_transmit_cmd(chip, NULL, &cmd, SAVESTATE_RESULT_SIZE, + rc = tpm_transmit_cmd(chip, NULL, buf.data, PAGE_SIZE, 0, 0, NULL); /* @@ -760,6 +758,8 @@ int tpm1_pm_suspend(struct tpm_chip *chip, u32 tpm_suspend_pcr) if (rc != TPM_WARN_RETRY) break; tpm_msleep(TPM_TIMEOUT_RETRY); + + tpm_buf_reset(&buf, TPM_TAG_RQU_COMMAND, TPM_ORD_SAVESTATE); } if (rc) @@ -769,6 +769,8 @@ int tpm1_pm_suspend(struct tpm_chip *chip, u32 tpm_suspend_pcr) dev_warn(&chip->dev, "TPM savestate took %dms\n", try * TPM_TIMEOUT_RETRY); + tpm_buf_destroy(&buf); + return rc; }