From patchwork Mon Mar 26 12:14:05 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jarkko Sakkinen X-Patchwork-Id: 10307735 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id B3B76600F6 for ; Mon, 26 Mar 2018 12:15:25 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A1FBB29662 for ; Mon, 26 Mar 2018 12:15:25 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 956F029666; Mon, 26 Mar 2018 12:15:25 +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=unavailable 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 4032729662 for ; Mon, 26 Mar 2018 12:15:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751997AbeCZMOp (ORCPT ); Mon, 26 Mar 2018 08:14:45 -0400 Received: from mga05.intel.com ([192.55.52.43]:38225 "EHLO mga05.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751686AbeCZMOn (ORCPT ); Mon, 26 Mar 2018 08:14:43 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga105.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 26 Mar 2018 05:14:42 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.48,364,1517904000"; d="scan'208";a="41292452" Received: from meskola-mobl3.ger.corp.intel.com (HELO localhost) ([10.249.254.165]) by fmsmga001.fm.intel.com with ESMTP; 26 Mar 2018 05:14:38 -0700 From: Jarkko Sakkinen To: linux-integrity@vger.kernel.org Cc: linux-security-module@vger.kernel.org, Jarkko Sakkinen , Peter Huewe , Jason Gunthorpe , Arnd Bergmann , Greg Kroah-Hartman , linux-kernel@vger.kernel.org (open list) Subject: [PATCH v4 3/4] tpm: migrate tpm2_get_tpm_pt() to use struct tpm_buf Date: Mon, 26 Mar 2018 15:14:05 +0300 Message-Id: <20180326121406.14548-4-jarkko.sakkinen@linux.intel.com> X-Mailer: git-send-email 2.15.1 In-Reply-To: <20180326121406.14548-1-jarkko.sakkinen@linux.intel.com> References: <20180326121406.14548-1-jarkko.sakkinen@linux.intel.com> Sender: owner-linux-security-module@vger.kernel.org Precedence: bulk List-ID: X-Virus-Scanned: ClamAV using ClamSMTP In order to make struct tpm_buf the first class object for constructing TPM commands, migrate tpm2_get_tpm_pt() to use it. Signed-off-by: Jarkko Sakkinen Reviewed-by: Nayna Jain Tested-by: Nayna Jain Reviewed-by: Jerry Snitselaar --- drivers/char/tpm/tpm2-cmd.c | 63 +++++++++++++++++---------------------------- 1 file changed, 23 insertions(+), 40 deletions(-) diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c index 7bffd0fd1dca..b3b52f9eb65f 100644 --- a/drivers/char/tpm/tpm2-cmd.c +++ b/drivers/char/tpm/tpm2-cmd.c @@ -27,20 +27,6 @@ enum tpm2_session_attributes { TPM2_SA_CONTINUE_SESSION = BIT(0), }; -struct tpm2_get_tpm_pt_in { - __be32 cap_id; - __be32 property_id; - __be32 property_cnt; -} __packed; - -struct tpm2_get_tpm_pt_out { - u8 more_data; - __be32 subcap_id; - __be32 property_cnt; - __be32 property_id; - __be32 value; -} __packed; - struct tpm2_get_random_in { __be16 size; } __packed; @@ -51,8 +37,6 @@ struct tpm2_get_random_out { } __packed; union tpm2_cmd_params { - struct tpm2_get_tpm_pt_in get_tpm_pt_in; - struct tpm2_get_tpm_pt_out get_tpm_pt_out; struct tpm2_get_random_in getrandom_in; struct tpm2_get_random_out getrandom_out; }; @@ -379,19 +363,6 @@ int tpm2_get_random(struct tpm_chip *chip, u8 *out, size_t max) return total ? total : -EIO; } -#define TPM2_GET_TPM_PT_IN_SIZE \ - (sizeof(struct tpm_input_header) + \ - sizeof(struct tpm2_get_tpm_pt_in)) - -#define TPM2_GET_TPM_PT_OUT_BODY_SIZE \ - sizeof(struct tpm2_get_tpm_pt_out) - -static const struct tpm_input_header tpm2_get_tpm_pt_header = { - .tag = cpu_to_be16(TPM2_ST_NO_SESSIONS), - .length = cpu_to_be32(TPM2_GET_TPM_PT_IN_SIZE), - .ordinal = cpu_to_be32(TPM2_CC_GET_CAPABILITY) -}; - /** * tpm2_flush_context_cmd() - execute a TPM2_FlushContext command * @chip: TPM chip to use @@ -725,6 +696,14 @@ int tpm2_unseal_trusted(struct tpm_chip *chip, return rc; } +struct tpm2_get_cap_out { + u8 more_data; + __be32 subcap_id; + __be32 property_cnt; + __be32 property_id; + __be32 value; +} __packed; + /** * tpm2_get_tpm_pt() - get value of a TPM_CAP_TPM_PROPERTIES type property * @chip: TPM chip to use. @@ -737,19 +716,23 @@ int tpm2_unseal_trusted(struct tpm_chip *chip, ssize_t tpm2_get_tpm_pt(struct tpm_chip *chip, u32 property_id, u32 *value, const char *desc) { - struct tpm2_cmd cmd; + struct tpm2_get_cap_out *out; + struct tpm_buf buf; int rc; - cmd.header.in = tpm2_get_tpm_pt_header; - cmd.params.get_tpm_pt_in.cap_id = cpu_to_be32(TPM2_CAP_TPM_PROPERTIES); - cmd.params.get_tpm_pt_in.property_id = cpu_to_be32(property_id); - cmd.params.get_tpm_pt_in.property_cnt = cpu_to_be32(1); - - rc = tpm_transmit_cmd(chip, NULL, &cmd, sizeof(cmd), - TPM2_GET_TPM_PT_OUT_BODY_SIZE, 0, desc); - if (!rc) - *value = be32_to_cpu(cmd.params.get_tpm_pt_out.value); - + rc = tpm_buf_init(&buf, TPM2_ST_NO_SESSIONS, TPM2_CC_GET_CAPABILITY); + if (rc) + return rc; + tpm_buf_append_u32(&buf, TPM2_CAP_TPM_PROPERTIES); + tpm_buf_append_u32(&buf, property_id); + tpm_buf_append_u32(&buf, 1); + rc = tpm_transmit_cmd(chip, NULL, buf.data, PAGE_SIZE, 0, 0, NULL); + if (!rc) { + out = (struct tpm2_get_cap_out *) + &buf.data[TPM_HEADER_SIZE]; + *value = be32_to_cpu(out->value); + } + tpm_buf_destroy(&buf); return rc; } EXPORT_SYMBOL_GPL(tpm2_get_tpm_pt);