From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/drivers/char/tpm/tpm-sysfs.c | 299 ++++++++++++++++++++++++++++++++++++ 1 file changed, 299 insertions(+) create mode 100644 kernel/drivers/char/tpm/tpm-sysfs.c (limited to 'kernel/drivers/char/tpm/tpm-sysfs.c') diff --git a/kernel/drivers/char/tpm/tpm-sysfs.c b/kernel/drivers/char/tpm/tpm-sysfs.c new file mode 100644 index 000000000..ee66fd467 --- /dev/null +++ b/kernel/drivers/char/tpm/tpm-sysfs.c @@ -0,0 +1,299 @@ +/* + * Copyright (C) 2004 IBM Corporation + * Authors: + * Leendert van Doorn + * Dave Safford + * Reiner Sailer + * Kylene Hall + * + * Copyright (C) 2013 Obsidian Research Corp + * Jason Gunthorpe + * + * sysfs filesystem inspection interface to the TPM + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation, version 2 of the + * License. + * + */ +#include +#include "tpm.h" + +#define READ_PUBEK_RESULT_SIZE 314 +#define TPM_ORD_READPUBEK cpu_to_be32(124) +static struct tpm_input_header tpm_readpubek_header = { + .tag = TPM_TAG_RQU_COMMAND, + .length = cpu_to_be32(30), + .ordinal = TPM_ORD_READPUBEK +}; +static ssize_t pubek_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + u8 *data; + struct tpm_cmd_t tpm_cmd; + ssize_t err; + int i, rc; + char *str = buf; + + struct tpm_chip *chip = dev_get_drvdata(dev); + + tpm_cmd.header.in = tpm_readpubek_header; + err = tpm_transmit_cmd(chip, &tpm_cmd, READ_PUBEK_RESULT_SIZE, + "attempting to read the PUBEK"); + if (err) + goto out; + + /* + ignore header 10 bytes + algorithm 32 bits (1 == RSA ) + encscheme 16 bits + sigscheme 16 bits + parameters (RSA 12->bytes: keybit, #primes, expbit) + keylenbytes 32 bits + 256 byte modulus + ignore checksum 20 bytes + */ + data = tpm_cmd.params.readpubek_out_buffer; + str += + sprintf(str, + "Algorithm: %02X %02X %02X %02X\n" + "Encscheme: %02X %02X\n" + "Sigscheme: %02X %02X\n" + "Parameters: %02X %02X %02X %02X " + "%02X %02X %02X %02X " + "%02X %02X %02X %02X\n" + "Modulus length: %d\n" + "Modulus:\n", + data[0], data[1], data[2], data[3], + data[4], data[5], + data[6], data[7], + data[12], data[13], data[14], data[15], + data[16], data[17], data[18], data[19], + data[20], data[21], data[22], data[23], + be32_to_cpu(*((__be32 *) (data + 24)))); + + for (i = 0; i < 256; i++) { + str += sprintf(str, "%02X ", data[i + 28]); + if ((i + 1) % 16 == 0) + str += sprintf(str, "\n"); + } +out: + rc = str - buf; + return rc; +} +static DEVICE_ATTR_RO(pubek); + +static ssize_t pcrs_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + cap_t cap; + u8 digest[TPM_DIGEST_SIZE]; + ssize_t rc; + int i, j, num_pcrs; + char *str = buf; + struct tpm_chip *chip = dev_get_drvdata(dev); + + rc = tpm_getcap(dev, TPM_CAP_PROP_PCR, &cap, + "attempting to determine the number of PCRS"); + if (rc) + return 0; + + num_pcrs = be32_to_cpu(cap.num_pcrs); + for (i = 0; i < num_pcrs; i++) { + rc = tpm_pcr_read_dev(chip, i, digest); + if (rc) + break; + str += sprintf(str, "PCR-%02d: ", i); + for (j = 0; j < TPM_DIGEST_SIZE; j++) + str += sprintf(str, "%02X ", digest[j]); + str += sprintf(str, "\n"); + } + return str - buf; +} +static DEVICE_ATTR_RO(pcrs); + +static ssize_t enabled_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + cap_t cap; + ssize_t rc; + + rc = tpm_getcap(dev, TPM_CAP_FLAG_PERM, &cap, + "attempting to determine the permanent enabled state"); + if (rc) + return 0; + + rc = sprintf(buf, "%d\n", !cap.perm_flags.disable); + return rc; +} +static DEVICE_ATTR_RO(enabled); + +static ssize_t active_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + cap_t cap; + ssize_t rc; + + rc = tpm_getcap(dev, TPM_CAP_FLAG_PERM, &cap, + "attempting to determine the permanent active state"); + if (rc) + return 0; + + rc = sprintf(buf, "%d\n", !cap.perm_flags.deactivated); + return rc; +} +static DEVICE_ATTR_RO(active); + +static ssize_t owned_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + cap_t cap; + ssize_t rc; + + rc = tpm_getcap(dev, TPM_CAP_PROP_OWNER, &cap, + "attempting to determine the owner state"); + if (rc) + return 0; + + rc = sprintf(buf, "%d\n", cap.owned); + return rc; +} +static DEVICE_ATTR_RO(owned); + +static ssize_t temp_deactivated_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + cap_t cap; + ssize_t rc; + + rc = tpm_getcap(dev, TPM_CAP_FLAG_VOL, &cap, + "attempting to determine the temporary state"); + if (rc) + return 0; + + rc = sprintf(buf, "%d\n", cap.stclear_flags.deactivated); + return rc; +} +static DEVICE_ATTR_RO(temp_deactivated); + +static ssize_t caps_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + cap_t cap; + ssize_t rc; + char *str = buf; + + rc = tpm_getcap(dev, TPM_CAP_PROP_MANUFACTURER, &cap, + "attempting to determine the manufacturer"); + if (rc) + return 0; + str += sprintf(str, "Manufacturer: 0x%x\n", + be32_to_cpu(cap.manufacturer_id)); + + /* Try to get a TPM version 1.2 TPM_CAP_VERSION_INFO */ + rc = tpm_getcap(dev, CAP_VERSION_1_2, &cap, + "attempting to determine the 1.2 version"); + if (!rc) { + str += sprintf(str, + "TCG version: %d.%d\nFirmware version: %d.%d\n", + cap.tpm_version_1_2.Major, + cap.tpm_version_1_2.Minor, + cap.tpm_version_1_2.revMajor, + cap.tpm_version_1_2.revMinor); + } else { + /* Otherwise just use TPM_STRUCT_VER */ + rc = tpm_getcap(dev, CAP_VERSION_1_1, &cap, + "attempting to determine the 1.1 version"); + if (rc) + return 0; + str += sprintf(str, + "TCG version: %d.%d\nFirmware version: %d.%d\n", + cap.tpm_version.Major, + cap.tpm_version.Minor, + cap.tpm_version.revMajor, + cap.tpm_version.revMinor); + } + + return str - buf; +} +static DEVICE_ATTR_RO(caps); + +static ssize_t cancel_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct tpm_chip *chip = dev_get_drvdata(dev); + if (chip == NULL) + return 0; + + chip->ops->cancel(chip); + return count; +} +static DEVICE_ATTR_WO(cancel); + +static ssize_t durations_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct tpm_chip *chip = dev_get_drvdata(dev); + + if (chip->vendor.duration[TPM_LONG] == 0) + return 0; + + return sprintf(buf, "%d %d %d [%s]\n", + jiffies_to_usecs(chip->vendor.duration[TPM_SHORT]), + jiffies_to_usecs(chip->vendor.duration[TPM_MEDIUM]), + jiffies_to_usecs(chip->vendor.duration[TPM_LONG]), + chip->vendor.duration_adjusted + ? "adjusted" : "original"); +} +static DEVICE_ATTR_RO(durations); + +static ssize_t timeouts_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct tpm_chip *chip = dev_get_drvdata(dev); + + return sprintf(buf, "%d %d %d %d [%s]\n", + jiffies_to_usecs(chip->vendor.timeout_a), + jiffies_to_usecs(chip->vendor.timeout_b), + jiffies_to_usecs(chip->vendor.timeout_c), + jiffies_to_usecs(chip->vendor.timeout_d), + chip->vendor.timeout_adjusted + ? "adjusted" : "original"); +} +static DEVICE_ATTR_RO(timeouts); + +static struct attribute *tpm_dev_attrs[] = { + &dev_attr_pubek.attr, + &dev_attr_pcrs.attr, + &dev_attr_enabled.attr, + &dev_attr_active.attr, + &dev_attr_owned.attr, + &dev_attr_temp_deactivated.attr, + &dev_attr_caps.attr, + &dev_attr_cancel.attr, + &dev_attr_durations.attr, + &dev_attr_timeouts.attr, + NULL, +}; + +static const struct attribute_group tpm_dev_group = { + .attrs = tpm_dev_attrs, +}; + +int tpm_sysfs_add_device(struct tpm_chip *chip) +{ + int err; + err = sysfs_create_group(&chip->pdev->kobj, + &tpm_dev_group); + + if (err) + dev_err(chip->pdev, + "failed to create sysfs attributes, %d\n", err); + return err; +} + +void tpm_sysfs_del_device(struct tpm_chip *chip) +{ + sysfs_remove_group(&chip->pdev->kobj, &tpm_dev_group); +} -- cgit 1.2.3-korg