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From: Tomas Winkler <tomas.winkler@intel.com>
To: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>,
	Jason Gunthorpe <jgg@ziepe.ca>
Cc: Nayna Jain <nayna@linux.vnet.ibm.com>,
	Alexander Usyskin <alexander.usyskin@intel.com>,
	Tadeusz Struk <tadeusz.struk@intel.com>,
	linux-integrity@vger.kernel.org,
	linux-security-module@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	Tomas Winkler <tomas.winkler@intel.com>
Subject: [PATCH v7 19/21] tpm1: reimplement SAVESTATE using tpm_buf
Date: Fri, 19 Oct 2018 21:23:05 +0300	[thread overview]
Message-ID: <20181019182307.17745-20-tomas.winkler@intel.com> (raw)
In-Reply-To: <20181019182307.17745-1-tomas.winkler@intel.com>

In tpm1_pm_suspend() function reimplement,
TPM_ORD_SAVESTATE comamnd using tpm_buf.

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
---
V3: New in the series.
V4-V7: Resend

 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 05b772477bac..d418a27a75e0 100644
--- a/drivers/char/tpm/tpm1-cmd.c
+++ b/drivers/char/tpm/tpm1-cmd.c
@@ -718,12 +718,6 @@ 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)
-};
 
 /**
  * tpm1_pm_suspend() - pm suspend handler
@@ -739,18 +733,22 @@ static const struct tpm_input_header savestate_header = {
 int tpm1_pm_suspend(struct tpm_chip *chip, int 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);
 
 		/*
@@ -766,6 +764,8 @@ int tpm1_pm_suspend(struct tpm_chip *chip, int 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)
@@ -775,6 +775,8 @@ int tpm1_pm_suspend(struct tpm_chip *chip, int tpm_suspend_pcr)
 		dev_warn(&chip->dev, "TPM savestate took %dms\n",
 			 try * TPM_TIMEOUT_RETRY);
 
+	tpm_buf_destroy(&buf);
+
 	return rc;
 }
 
-- 
2.14.4


  parent reply	other threads:[~2018-10-19 18:28 UTC|newest]

Thread overview: 39+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-10-19 18:22 [PATCH v7 00/21] tpm: separate tpm 1.x and tpm 2.x commands Tomas Winkler
2018-10-19 18:22 ` [PATCH v7 01/21] tpm: tpm_i2c_nuvoton: use correct command duration for TPM 2.x Tomas Winkler
2018-10-20  0:51   ` Jarkko Sakkinen
2018-10-19 18:22 ` [PATCH v7 02/21] tpm2: add new tpm2 commands according to TCG 1.36 Tomas Winkler
2018-10-20  0:53   ` Jarkko Sakkinen
2018-10-19 18:22 ` [PATCH v7 03/21] tpm: sort objects in the Makefile Tomas Winkler
2018-10-19 18:22 ` [PATCH v7 04/21] tpm: factor out tpm 1.x duration calculation to tpm1-cmd.c Tomas Winkler
2018-10-20  0:56   ` Jarkko Sakkinen
2018-10-19 18:22 ` [PATCH v7 05/21] tpm: add tpm_calc_ordinal_duration() wrapper Tomas Winkler
2018-10-19 18:22 ` [PATCH v7 06/21] tpm: factor out tpm_get_timeouts() Tomas Winkler
2018-10-19 18:22 ` [PATCH v7 07/21] tpm: move tpm1_pcr_extend to tpm1-cmd.c Tomas Winkler
2018-10-19 18:22 ` [PATCH v7 08/21] tpm: move tpm_getcap " Tomas Winkler
2018-10-19 18:22 ` [PATCH v7 09/21] tpm: factor out tpm1_get_random into tpm1-cmd.c Tomas Winkler
2018-10-20  0:58   ` Jarkko Sakkinen
2018-10-23 18:42   ` Jarkko Sakkinen
2018-10-19 18:22 ` [PATCH v7 10/21] tpm: move tpm 1.x selftest code from tpm-interface.c tpm1-cmd.c Tomas Winkler
2018-10-19 18:22 ` [PATCH v7 11/21] tpm: factor out tpm 1.x pm suspend flow into tpm1-cmd.c Tomas Winkler
2018-10-20  1:05   ` Jarkko Sakkinen
2018-10-23 18:43   ` Jarkko Sakkinen
2018-10-19 18:22 ` [PATCH v7 12/21] tpm: factor out tpm_startup function Tomas Winkler
2018-10-20  1:06   ` Jarkko Sakkinen
2018-10-19 18:22 ` [PATCH v7 13/21] tpm: add tpm_auto_startup() into tpm-interface.c Tomas Winkler
2018-10-20  1:09   ` Jarkko Sakkinen
2018-10-19 18:23 ` [PATCH v7 14/21] tpm: tpm-interface.c drop unused macros Tomas Winkler
2018-10-19 18:23 ` [PATCH v7 15/21] tpm: tpm-space.c remove unneeded semicolon Tomas Winkler
2018-10-19 18:23 ` [PATCH v7 16/21] tpm: tpm1: rewrite tpm1_get_random() using tpm_buf structure Tomas Winkler
2018-10-19 18:23 ` [PATCH v7 17/21] tpm1: implement tpm1_pcr_read_dev() " Tomas Winkler
2018-10-19 18:23 ` [PATCH v7 18/21] tpm1: rename tpm1_pcr_read_dev to tpm1_pcr_read() Tomas Winkler
2018-10-23 18:44   ` Jarkko Sakkinen
2018-10-19 18:23 ` Tomas Winkler [this message]
2018-10-19 18:23 ` [PATCH v7 20/21] tpm1: reimplement tpm1_continue_selftest() using tpm_buf Tomas Winkler
2018-10-19 18:23 ` [PATCH v7 21/21] tpm: use u32 instead of int for PCR index Tomas Winkler
2018-10-23 18:44   ` Jarkko Sakkinen
2018-10-23 18:55   ` Jarkko Sakkinen
2018-10-23 18:56     ` Winkler, Tomas
2018-10-20  1:19 ` [PATCH v7 00/21] tpm: separate tpm 1.x and tpm 2.x commands Jarkko Sakkinen
2018-10-22 17:12   ` Winkler, Tomas
2018-10-23 13:14     ` Jarkko Sakkinen
2018-10-23 13:35       ` Winkler, Tomas

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