linux-kernel - [PATCH v2 2/3] tpm: move endianness conversion of ordinals to tpm_input

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Message-ID: <20170503161911.17606-3-roberto.sassu@huawei.com>
Date:   Wed, 3 May 2017 18:19:10 +0200
From:   Roberto Sassu <roberto.sassu@...wei.com>
To:     <tpmdd-devel@...ts.sourceforge.net>
CC:     <linux-ima-devel@...ts.sourceforge.net>,
        <linux-security-module@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        Roberto Sassu <roberto.sassu@...wei.com>
Subject: [PATCH v2 2/3] tpm: move endianness conversion of ordinals to tpm_input_header

Move CPU native value to big-endian conversion of ordinals to the
tpm_input_header declarations.

With the previous and this patch it will now be possible to modify TPM 1.2
functions to use tpm_buf_init(), which expects CPU native value for the
tag and ordinal arguments.

Signed-off-by: Roberto Sassu <roberto.sassu@...wei.com>
---
v2
- restored TPM_ORD_ definitions in tpm-interface.c and tpm-sysfs.c

 drivers/char/tpm/tpm-interface.c | 24 ++++++++++++------------
 drivers/char/tpm/tpm-sysfs.c     |  4 ++--
 2 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c
index a6bc0ba..a8351dd 100644
--- a/drivers/char/tpm/tpm-interface.c
+++ b/drivers/char/tpm/tpm-interface.c
@@ -468,13 +468,13 @@ ssize_t tpm_transmit_cmd(struct tpm_chip *chip, const void *buf,
 #define TPM_DIGEST_SIZE 20
 #define TPM_RET_CODE_IDX 6
 #define TPM_INTERNAL_RESULT_SIZE 200
-#define TPM_ORD_GET_CAP cpu_to_be32(101)
-#define TPM_ORD_GET_RANDOM cpu_to_be32(70)
+#define TPM_ORD_GET_CAP 101
+#define TPM_ORD_GET_RANDOM 70
 
 static const struct tpm_input_header tpm_getcap_header = {
 	.tag = cpu_to_be16(TPM_TAG_RQU_COMMAND),
 	.length = cpu_to_be32(22),
-	.ordinal = TPM_ORD_GET_CAP
+	.ordinal = cpu_to_be32(TPM_ORD_GET_CAP)
 };
 
 ssize_t tpm_getcap(struct tpm_chip *chip, u32 subcap_id, cap_t *cap,
@@ -509,14 +509,14 @@ ssize_t tpm_getcap(struct tpm_chip *chip, u32 subcap_id, cap_t *cap,
 }
 EXPORT_SYMBOL_GPL(tpm_getcap);
 
-#define TPM_ORD_STARTUP cpu_to_be32(153)
+#define TPM_ORD_STARTUP 153
 #define TPM_ST_CLEAR cpu_to_be16(1)
 #define TPM_ST_STATE cpu_to_be16(2)
 #define TPM_ST_DEACTIVATED cpu_to_be16(3)
 static const struct tpm_input_header tpm_startup_header = {
 	.tag = cpu_to_be16(TPM_TAG_RQU_COMMAND),
 	.length = cpu_to_be32(12),
-	.ordinal = TPM_ORD_STARTUP
+	.ordinal = cpu_to_be32(TPM_ORD_STARTUP)
 };
 
 static int tpm_startup(struct tpm_chip *chip, __be16 startup_type)
@@ -687,13 +687,13 @@ static int tpm_continue_selftest(struct tpm_chip *chip)
 	return rc;
 }
 
-#define TPM_ORDINAL_PCRREAD cpu_to_be32(21)
+#define TPM_ORDINAL_PCRREAD 21
 #define READ_PCR_RESULT_SIZE 30
 #define READ_PCR_RESULT_BODY_SIZE 20
 static const struct tpm_input_header pcrread_header = {
 	.tag = cpu_to_be16(TPM_TAG_RQU_COMMAND),
 	.length = cpu_to_be32(14),
-	.ordinal = TPM_ORDINAL_PCRREAD
+	.ordinal = cpu_to_be32(TPM_ORDINAL_PCRREAD)
 };
 
 int tpm_pcr_read_dev(struct tpm_chip *chip, int pcr_idx, u8 *res_buf)
@@ -765,13 +765,13 @@ int tpm_pcr_read(u32 chip_num, int pcr_idx, u8 *res_buf)
 }
 EXPORT_SYMBOL_GPL(tpm_pcr_read);
 
-#define TPM_ORD_PCR_EXTEND cpu_to_be32(20)
+#define TPM_ORD_PCR_EXTEND 20
 #define EXTEND_PCR_RESULT_SIZE 34
 #define EXTEND_PCR_RESULT_BODY_SIZE 20
 static const struct tpm_input_header pcrextend_header = {
 	.tag = cpu_to_be16(TPM_TAG_RQU_COMMAND),
 	.length = cpu_to_be32(34),
-	.ordinal = TPM_ORD_PCR_EXTEND
+	.ordinal = cpu_to_be32(TPM_ORD_PCR_EXTEND)
 };
 
 /**
@@ -987,13 +987,13 @@ int wait_for_tpm_stat(struct tpm_chip *chip, u8 mask, unsigned long timeout,
 }
 EXPORT_SYMBOL_GPL(wait_for_tpm_stat);
 
-#define TPM_ORD_SAVESTATE cpu_to_be32(152)
+#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 = TPM_ORD_SAVESTATE
+	.ordinal = cpu_to_be32(TPM_ORD_SAVESTATE)
 };
 
 /*
@@ -1078,7 +1078,7 @@ EXPORT_SYMBOL_GPL(tpm_pm_resume);
 static const struct tpm_input_header tpm_getrandom_header = {
 	.tag = cpu_to_be16(TPM_TAG_RQU_COMMAND),
 	.length = cpu_to_be32(14),
-	.ordinal = TPM_ORD_GET_RANDOM
+	.ordinal = cpu_to_be32(TPM_ORD_GET_RANDOM)
 };
 
 /**
diff --git a/drivers/char/tpm/tpm-sysfs.c b/drivers/char/tpm/tpm-sysfs.c
index a078b4d..c8cc0d5 100644
--- a/drivers/char/tpm/tpm-sysfs.c
+++ b/drivers/char/tpm/tpm-sysfs.c
@@ -22,11 +22,11 @@
 
 #define READ_PUBEK_RESULT_SIZE 314
 #define READ_PUBEK_RESULT_MIN_BODY_SIZE (28 + 256)
-#define TPM_ORD_READPUBEK cpu_to_be32(124)
+#define TPM_ORD_READPUBEK 124
 static const struct tpm_input_header tpm_readpubek_header = {
 	.tag = cpu_to_be16(TPM_TAG_RQU_COMMAND),
 	.length = cpu_to_be32(30),
-	.ordinal = TPM_ORD_READPUBEK
+	.ordinal = cpu_to_be32(TPM_ORD_READPUBEK)
 };
 static ssize_t pubek_show(struct device *dev, struct device_attribute *attr,
 			  char *buf)
-- 
2.9.3