This patch adds internal kernel support for:[...]
- reading/extending a pcr value
- looking up the tpm_chip for a given chip number and type
Signed-off-by: Mimi Zohar <zohar@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Rajiv Andrade <srajiv@xxxxxxxxxx>
---
diff --git a/drivers/char/tpm/tpm.c b/drivers/char/tpm/tpm.c
index 9c47dc4..17d2849 100644
--- a/drivers/char/tpm/tpm.c
+++ b/drivers/char/tpm/tpm.c
@@ -1,11 +1,12 @@
/*
- * Copyright (C) 2004 IBM Corporation
+ * Copyright (C) 2004,2007,2008 IBM Corporation
*
* Authors:
* Leendert van Doorn <leendert@xxxxxxxxxxxxxx>
* Dave Safford <safford@xxxxxxxxxxxxxx>
* Reiner Sailer <sailer@xxxxxxxxxxxxxx>
* Kylene Hall <kjhall@xxxxxxxxxx>
+ * Debora Velarde <dvelarde@xxxxxxxxxx>
*
* Maintained by: <tpmdd-devel@xxxxxxxxxxxxxxxxxxxxx>
*
@@ -28,6 +29,14 @@
#include <linux/spinlock.h>
#include <linux/smp_lock.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/crypto.h>
+#include <linux/fs.h>
+#include <linux/scatterlist.h>
+#include <linux/rcupdate.h>
+#include <asm/unaligned.h>
#include "tpm.h"
enum tpm_const {
@@ -50,6 +59,8 @@ enum tpm_duration {
static LIST_HEAD(tpm_chip_list);
static DEFINE_SPINLOCK(driver_lock);
static DECLARE_BITMAP(dev_mask, TPM_NUM_DEVICES);
+#define TPM_CHIP_NUM_MASK 0x0000ffff
+#define TPM_CHIP_TYPE_SHIFT 16
/*
* Array with one entry per ordinal defining the maximum amount
@@ -366,8 +377,7 @@ EXPORT_SYMBOL_GPL(tpm_calc_ordinal_duration);
/*
* Internal kernel interface to transmit TPM commands
*/
-static ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf,
- size_t bufsiz)
+ssize_t tpm_transmit(struct tpm_chip *chip, char *buf, size_t bufsiz)
{
ssize_t rc;
u32 count, ordinal;
@@ -425,6 +435,7 @@ out:
mutex_unlock(&chip->tpm_mutex);
return rc;
}
+EXPORT_SYMBOL_GPL(tpm_transmit);
#define TPM_DIGEST_SIZE 20
#define TPM_ERROR_SIZE 10
@@ -717,6 +728,7 @@ ssize_t tpm_show_temp_deactivated(struct device * dev,
}
EXPORT_SYMBOL_GPL(tpm_show_temp_deactivated);
+#define READ_PCR_RESULT_SIZE 30
+#ifndef __LINUX_TPM_H__
+#define __LINUX_TPM_H__
+
+#define PCI_DEVICE_ID_AMD_8111_LPC 0x7468
+
+/*
+ * Chip type is one of these values in the upper two bytes of chip_id
+ */
+enum tpm_chip_type {
+ TPM_HW_TYPE = 0x0,
+ TPM_SW_TYPE = 0x1,
+ TPM_ANY_TYPE = 0xFFFF,
+};
+
+/*
+ * Chip num is this value or a valid tpm idx in lower two bytes of chip_id
+ */
+enum tpm_chip_num {
+ TPM_ANY_NUM = 0xFFFF,
+};
+
+
+#if defined(CONFIG_TCG_TPM) || defined(CONFIG_TCG_TPM_MODULE)
+
+extern int tpm_pcr_read(u32 chip_id, int pcr_idx, u8 *res_buf);
+extern int tpm_pcr_extend(u32 chip_id, int pcr_idx, const u8 *hash);
+#endif
+#endif