Re: [GIT PULL] tpmdd: TPM drivers, tpm-rng and fixes

From: James Morris
Date: Thu Aug 23 2012 - 16:35:24 EST

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On Wed, 22 Aug 2012, Kent Yoder wrote:

> Hi James,
>
> The following changes since commit 51b743fe87d7fb3dba7a2ff4a1fe23bb65dc2245:
>
> Merge tag 'v3.6-rc2' into next (2012-08-17 20:42:30 +1000)
>
> are available in the git repository at:
>
> git://github.com/shpedoikal/linux.git v3.6-rc2-tpmdd

I'm getting this error when building i2c as a module
WARNING: "__i2c_transfer" [drivers/char/tpm/tpm_i2c_infineon.ko] undefined!

>
> New stuff since my last pull request are Jesper's error checking of the
> acpi_os_map_memory call, Ashley's vTPM driver for PPC64, my enabling the
> vTPM driver when IMA is selected on PPC64 and Xiaoyan's addition of
> Physical Presence Interface.
>
> Thanks,
> Kent
>
> Ashley Lai (3):
> drivers/char/tpm: Add new device driver to support IBM vTPM
> PPC64: Add support for instantiating SML from Open Firmware
> drivers/char/tpm: Add securityfs support for event log
>
> Jesper Juhl (1):
> tpm: Do not dereference NULL pointer if acpi_os_map_memory() fails.
>
> Kent Yoder (6):
> tpm: modularize event log collection
> tpm: Move tpm_get_random api into the TPM device driver
> hw_random: add support for the TPM chip as a hardware RNG source
> tpm: fix double write race and tpm_release free issue
> tpm: compile out unused code in the PNP and PM cases
> ima: enable the IBM vTPM as the default TPM in the PPC64 case
>
> Peter Huewe (1):
> char/tpm: Add new driver for Infineon I2C TIS TPM
>
> Xiaoyan Zhang (2):
> Documentation: sysfs for Physical Presence Interface
> driver: add PPI support in tpm driver
>
> Documentation/ABI/testing/sysfs-driver-ppi | 70 +++
> arch/powerpc/kernel/prom_init.c | 62 ++
> drivers/char/hw_random/Kconfig | 13 +
> drivers/char/hw_random/Makefile | 1 +
> drivers/char/hw_random/tpm-rng.c | 50 ++
> drivers/char/tpm/Kconfig | 19 +
> drivers/char/tpm/Makefile | 8 +
> drivers/char/tpm/tpm.c | 70 ++-
> drivers/char/tpm/tpm.h | 35 +-
> drivers/char/tpm/tpm_acpi.c | 109 ++++
> drivers/char/tpm/{tpm_bios.c => tpm_eventlog.c} | 147 +-----
> drivers/char/tpm/tpm_eventlog.h | 86 +++
> drivers/char/tpm/tpm_i2c_infineon.c | 695 +++++++++++++++++++++
> drivers/char/tpm/tpm_ibmvtpm.c | 749 +++++++++++++++++++++++
> drivers/char/tpm/tpm_ibmvtpm.h | 77 +++
> drivers/char/tpm/tpm_of.c | 73 +++
> drivers/char/tpm/tpm_ppi.c | 460 ++++++++++++++
> drivers/char/tpm/tpm_tis.c | 3 +-
> include/linux/tpm.h | 4 +
> security/integrity/ima/Kconfig | 1 +
> security/keys/trusted.c | 54 +--
> 21 files changed, 2586 insertions(+), 200 deletions(-)
> create mode 100644 Documentation/ABI/testing/sysfs-driver-ppi
> create mode 100644 drivers/char/hw_random/tpm-rng.c
> create mode 100644 drivers/char/tpm/tpm_acpi.c
> rename drivers/char/tpm/{tpm_bios.c => tpm_eventlog.c} (75%)
> create mode 100644 drivers/char/tpm/tpm_eventlog.h
> create mode 100644 drivers/char/tpm/tpm_i2c_infineon.c
> create mode 100644 drivers/char/tpm/tpm_ibmvtpm.c
> create mode 100644 drivers/char/tpm/tpm_ibmvtpm.h
> create mode 100644 drivers/char/tpm/tpm_of.c
> create mode 100644 drivers/char/tpm/tpm_ppi.c
>
> diff --git a/Documentation/ABI/testing/sysfs-driver-ppi b/Documentation/ABI/testing/sysfs-driver-ppi
> new file mode 100644
> index 0000000..97a003e
> --- /dev/null
> +++ b/Documentation/ABI/testing/sysfs-driver-ppi
> @@ -0,0 +1,70 @@
> +What: /sys/devices/pnp0/<bus-num>/ppi/
> +Date: August 2012
> +Kernel Version: 3.6
> +Contact: xiaoyan.zhang@xxxxxxxxx
> +Description:
> + This folder includes the attributes related with PPI (Physical
> + Presence Interface). Only if TPM is supported by BIOS, this
> + folder makes sence. The folder path can be got by command
> + 'find /sys/ -name 'pcrs''. For the detail information of PPI,
> + please refer to the PPI specification from
> + http://www.trustedcomputinggroup.org/
> +
> +What: /sys/devices/pnp0/<bus-num>/ppi/version
> +Date: August 2012
> +Contact: xiaoyan.zhang@xxxxxxxxx
> +Description:
> + This attribute shows the version of the PPI supported by the
> + platform.
> + This file is readonly.
> +
> +What: /sys/devices/pnp0/<bus-num>/ppi/request
> +Date: August 2012
> +Contact: xiaoyan.zhang@xxxxxxxxx
> +Description:
> + This attribute shows the request for an operation to be
> + executed in the pre-OS environment. It is the only input from
> + the OS to the pre-OS environment. The request should be an
> + integer value range from 1 to 160, and 0 means no request.
> + This file can be read and written.
> +
> +What: /sys/devices/pnp0/00:<bus-num>/ppi/response
> +Date: August 2012
> +Contact: xiaoyan.zhang@xxxxxxxxx
> +Description:
> + This attribute shows the response to the most recent operation
> + request it acted upon. The format is "<request> <response num>
> + : <response description>".
> + This file is readonly.
> +
> +What: /sys/devices/pnp0/<bus-num>/ppi/transition_action
> +Date: August 2012
> +Contact: xiaoyan.zhang@xxxxxxxxx
> +Description:
> + This attribute shows the platform-specific action that should
> + take place in order to transition to the BIOS for execution of
> + a requested operation. The format is "<action num>: <action
> + description>".
> + This file is readonly.
> +
> +What: /sys/devices/pnp0/<bus-num>/ppi/tcg_operations
> +Date: August 2012
> +Contact: xiaoyan.zhang@xxxxxxxxx
> +Description:
> + This attribute shows whether it is allowed to request an
> + operation to be executed in the pre-OS environment by the BIOS
> + for the requests defined by TCG, i.e. requests from 1 to 22.
> + The format is "<request> <status num>: <status description>".
> + This attribute is only supported by PPI version 1.2+.
> + This file is readonly.
> +
> +What: /sys/devices/pnp0/<bus-num>/ppi/vs_operations
> +Date: August 2012
> +Contact: xiaoyan.zhang@xxxxxxxxx
> +Description:
> + This attribute shows whether it is allowed to request an
> + operation to be executed in the pre-OS environment by the BIOS
> + for the verdor specific requests, i.e. requests from 128 to
> + 255. The format is same with tcg_operations. This attribute
> + is also only supported by PPI version 1.2+.
> + This file is readonly.
> diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
> index 0794a30..e144498 100644
> --- a/arch/powerpc/kernel/prom_init.c
> +++ b/arch/powerpc/kernel/prom_init.c
> @@ -1624,6 +1624,63 @@ static void __init prom_instantiate_rtas(void)
>
> #ifdef CONFIG_PPC64
> /*
> + * Allocate room for and instantiate Stored Measurement Log (SML)
> + */
> +static void __init prom_instantiate_sml(void)
> +{
> + phandle ibmvtpm_node;
> + ihandle ibmvtpm_inst;
> + u32 entry = 0, size = 0;
> + u64 base;
> +
> + prom_debug("prom_instantiate_sml: start...\n");
> +
> + ibmvtpm_node = call_prom("finddevice", 1, 1, ADDR("/ibm,vtpm"));
> + prom_debug("ibmvtpm_node: %x\n", ibmvtpm_node);
> + if (!PHANDLE_VALID(ibmvtpm_node))
> + return;
> +
> + ibmvtpm_inst = call_prom("open", 1, 1, ADDR("/ibm,vtpm"));
> + if (!IHANDLE_VALID(ibmvtpm_inst)) {
> + prom_printf("opening vtpm package failed (%x)\n", ibmvtpm_inst);
> + return;
> + }
> +
> + if (call_prom_ret("call-method", 2, 2, &size,
> + ADDR("sml-get-handover-size"),
> + ibmvtpm_inst) != 0 || size == 0) {
> + prom_printf("SML get handover size failed\n");
> + return;
> + }
> +
> + base = alloc_down(size, PAGE_SIZE, 0);
> + if (base == 0)
> + prom_panic("Could not allocate memory for sml\n");
> +
> + prom_printf("instantiating sml at 0x%x...", base);
> +
> + if (call_prom_ret("call-method", 4, 2, &entry,
> + ADDR("sml-handover"),
> + ibmvtpm_inst, size, base) != 0 || entry == 0) {
> + prom_printf("SML handover failed\n");
> + return;
> + }
> + prom_printf(" done\n");
> +
> + reserve_mem(base, size);
> +
> + prom_setprop(ibmvtpm_node, "/ibm,vtpm", "linux,sml-base",
> + &base, sizeof(base));
> + prom_setprop(ibmvtpm_node, "/ibm,vtpm", "linux,sml-size",
> + &size, sizeof(size));
> +
> + prom_debug("sml base = 0x%x\n", base);
> + prom_debug("sml size = 0x%x\n", (long)size);
> +
> + prom_debug("prom_instantiate_sml: end...\n");
> +}
> +
> +/*
> * Allocate room for and initialize TCE tables
> */
> static void __init prom_initialize_tce_table(void)
> @@ -2916,6 +2973,11 @@ unsigned long __init prom_init(unsigned long r3, unsigned long r4,
> prom_instantiate_opal();
> #endif
>
> +#ifdef CONFIG_PPC64
> + /* instantiate sml */
> + prom_instantiate_sml();
> +#endif
> +
> /*
> * On non-powermacs, put all CPUs in spin-loops.
> *
> diff --git a/drivers/char/hw_random/Kconfig b/drivers/char/hw_random/Kconfig
> index 7c0d391..fbd9b2b 100644
> --- a/drivers/char/hw_random/Kconfig
> +++ b/drivers/char/hw_random/Kconfig
> @@ -289,3 +289,16 @@ config HW_RANDOM_EXYNOS
> module will be called exynos-rng.
>
> If unsure, say Y.
> +
> +config HW_RANDOM_TPM
> + tristate "TPM HW Random Number Generator support"
> + depends on HW_RANDOM && TCG_TPM
> + default HW_RANDOM
> + ---help---
> + This driver provides kernel-side support for the Random Number
> + Generator in the Trusted Platform Module
> +
> + To compile this driver as a module, choose M here: the
> + module will be called tpm-rng.
> +
> + If unsure, say Y.
> diff --git a/drivers/char/hw_random/Makefile b/drivers/char/hw_random/Makefile
> index 39a757c..1fd7eec 100644
> --- a/drivers/char/hw_random/Makefile
> +++ b/drivers/char/hw_random/Makefile
> @@ -25,3 +25,4 @@ obj-$(CONFIG_HW_RANDOM_PICOXCELL) += picoxcell-rng.o
> obj-$(CONFIG_HW_RANDOM_PPC4XX) += ppc4xx-rng.o
> obj-$(CONFIG_HW_RANDOM_PSERIES) += pseries-rng.o
> obj-$(CONFIG_HW_RANDOM_EXYNOS) += exynos-rng.o
> +obj-$(CONFIG_HW_RANDOM_TPM) += tpm-rng.o
> diff --git a/drivers/char/hw_random/tpm-rng.c b/drivers/char/hw_random/tpm-rng.c
> new file mode 100644
> index 0000000..d6d4482
> --- /dev/null
> +++ b/drivers/char/hw_random/tpm-rng.c
> @@ -0,0 +1,50 @@
> +/*
> + * Copyright (C) 2012 Kent Yoder IBM Corporation
> + *
> + * HWRNG interfaces to pull RNG data from a TPM
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
> + */
> +
> +#include <linux/module.h>
> +#include <linux/hw_random.h>
> +#include <linux/tpm.h>
> +
> +#define MODULE_NAME "tpm-rng"
> +
> +static int tpm_rng_read(struct hwrng *rng, void *data, size_t max, bool wait)
> +{
> + return tpm_get_random(TPM_ANY_NUM, data, max);
> +}
> +
> +static struct hwrng tpm_rng = {
> + .name = MODULE_NAME,
> + .read = tpm_rng_read,
> +};
> +
> +static int __init rng_init(void)
> +{
> + return hwrng_register(&tpm_rng);
> +}
> +module_init(rng_init);
> +
> +static void __exit rng_exit(void)
> +{
> + hwrng_unregister(&tpm_rng);
> +}
> +module_exit(rng_exit);
> +
> +MODULE_LICENSE("GPL v2");
> +MODULE_AUTHOR("Kent Yoder <key@xxxxxxxxxxxxxxxxxx>");
> +MODULE_DESCRIPTION("RNG driver for TPM devices");
> diff --git a/drivers/char/tpm/Kconfig b/drivers/char/tpm/Kconfig
> index a048199..915875e 100644
> --- a/drivers/char/tpm/Kconfig
> +++ b/drivers/char/tpm/Kconfig
> @@ -33,6 +33,17 @@ config TCG_TIS
> from within Linux. To compile this driver as a module, choose
> M here; the module will be called tpm_tis.
>
> +config TCG_TIS_I2C_INFINEON
> + tristate "TPM Interface Specification 1.2 Interface (I2C - Infineon)"
> + depends on I2C
> + ---help---
> + If you have a TPM security chip that is compliant with the
> + TCG TIS 1.2 TPM specification and Infineon's I2C Protocol Stack
> + Specification 0.20 say Yes and it will be accessible from within
> + Linux.
> + To compile this driver as a module, choose M here; the module
> + will be called tpm_tis_i2c_infineon.
> +
> config TCG_NSC
> tristate "National Semiconductor TPM Interface"
> depends on X86
> @@ -62,4 +73,12 @@ config TCG_INFINEON
> Further information on this driver and the supported hardware
> can be found at http://www.trust.rub.de/projects/linux-device-driver-infineon-tpm/
>
> +config TCG_IBMVTPM
> + tristate "IBM VTPM Interface"
> + depends on PPC64
> + ---help---
> + If you have IBM virtual TPM (VTPM) support say Yes and it
> + will be accessible from within Linux. To compile this driver
> + as a module, choose M here; the module will be called tpm_ibmvtpm.
> +
> endif # TCG_TPM
> diff --git a/drivers/char/tpm/Makefile b/drivers/char/tpm/Makefile
> index ea3a1e0..5b3fc8b 100644
> --- a/drivers/char/tpm/Makefile
> +++ b/drivers/char/tpm/Makefile
> @@ -4,8 +4,16 @@
> obj-$(CONFIG_TCG_TPM) += tpm.o
> ifdef CONFIG_ACPI
> obj-$(CONFIG_TCG_TPM) += tpm_bios.o
> + tpm_bios-objs += tpm_eventlog.o tpm_acpi.o tpm_ppi.o
> +else
> +ifdef CONFIG_TCG_IBMVTPM
> + obj-$(CONFIG_TCG_TPM) += tpm_bios.o
> + tpm_bios-objs += tpm_eventlog.o tpm_of.o
> +endif
> endif
> obj-$(CONFIG_TCG_TIS) += tpm_tis.o
> +obj-$(CONFIG_TCG_TIS_I2C_INFINEON) += tpm_i2c_infineon.o
> obj-$(CONFIG_TCG_NSC) += tpm_nsc.o
> obj-$(CONFIG_TCG_ATMEL) += tpm_atmel.o
> obj-$(CONFIG_TCG_INFINEON) += tpm_infineon.o
> +obj-$(CONFIG_TCG_IBMVTPM) += tpm_ibmvtpm.o
> diff --git a/drivers/char/tpm/tpm.c b/drivers/char/tpm/tpm.c
> index 817f0ee..39526c0 100644
> --- a/drivers/char/tpm/tpm.c
> +++ b/drivers/char/tpm/tpm.c
> @@ -30,12 +30,7 @@
> #include <linux/freezer.h>
>
> #include "tpm.h"
> -
> -enum tpm_const {
> - TPM_MINOR = 224, /* officially assigned */
> - TPM_BUFSIZE = 4096,
> - TPM_NUM_DEVICES = 256,
> -};
> +#include "tpm_eventlog.h"
>
> enum tpm_duration {
> TPM_SHORT = 0,
> @@ -482,6 +477,7 @@ static ssize_t transmit_cmd(struct tpm_chip *chip, struct tpm_cmd_t *cmd,
> #define TPM_INTERNAL_RESULT_SIZE 200
> #define TPM_TAG_RQU_COMMAND cpu_to_be16(193)
> #define TPM_ORD_GET_CAP cpu_to_be32(101)
> +#define TPM_ORD_GET_RANDOM cpu_to_be32(70)
>
> static const struct tpm_input_header tpm_getcap_header = {
> .tag = TPM_TAG_RQU_COMMAND,
> @@ -1175,7 +1171,7 @@ int tpm_release(struct inode *inode, struct file *file)
> flush_work_sync(&chip->work);
> file->private_data = NULL;
> atomic_set(&chip->data_pending, 0);
> - kfree(chip->data_buffer);
> + kzfree(chip->data_buffer);
> clear_bit(0, &chip->is_open);
> put_device(chip->dev);
> return 0;
> @@ -1227,7 +1223,6 @@ ssize_t tpm_read(struct file *file, char __user *buf,
> del_singleshot_timer_sync(&chip->user_read_timer);
> flush_work_sync(&chip->work);
> ret_size = atomic_read(&chip->data_pending);
> - atomic_set(&chip->data_pending, 0);
> if (ret_size > 0) { /* relay data */
> ssize_t orig_ret_size = ret_size;
> if (size < ret_size)
> @@ -1242,6 +1237,8 @@ ssize_t tpm_read(struct file *file, char __user *buf,
> mutex_unlock(&chip->buffer_mutex);
> }
>
> + atomic_set(&chip->data_pending, 0);
> +
> return ret_size;
> }
> EXPORT_SYMBOL_GPL(tpm_read);
> @@ -1326,6 +1323,58 @@ int tpm_pm_resume(struct device *dev)
> }
> EXPORT_SYMBOL_GPL(tpm_pm_resume);
>
> +#define TPM_GETRANDOM_RESULT_SIZE 18
> +static struct tpm_input_header tpm_getrandom_header = {
> + .tag = TPM_TAG_RQU_COMMAND,
> + .length = cpu_to_be32(14),
> + .ordinal = TPM_ORD_GET_RANDOM
> +};
> +
> +/**
> + * tpm_get_random() - Get random bytes from the tpm's RNG
> + * @chip_num: A specific chip number for the request or TPM_ANY_NUM
> + * @out: destination buffer for the random bytes
> + * @max: the max number of bytes to write to @out
> + *
> + * Returns < 0 on error and the number of bytes read on success
> + */
> +int tpm_get_random(u32 chip_num, u8 *out, size_t max)
> +{
> + struct tpm_chip *chip;
> + struct tpm_cmd_t tpm_cmd;
> + u32 recd, num_bytes = min_t(u32, max, TPM_MAX_RNG_DATA);
> + int err, total = 0, retries = 5;
> + u8 *dest = out;
> +
> + chip = tpm_chip_find_get(chip_num);
> + if (chip == NULL)
> + return -ENODEV;
> +
> + if (!out || !num_bytes || max > TPM_MAX_RNG_DATA)
> + return -EINVAL;
> +
> + do {
> + tpm_cmd.header.in = tpm_getrandom_header;
> + tpm_cmd.params.getrandom_in.num_bytes = cpu_to_be32(num_bytes);
> +
> + err = transmit_cmd(chip, &tpm_cmd,
> + TPM_GETRANDOM_RESULT_SIZE + num_bytes,
> + "attempting get random");
> + if (err)
> + break;
> +
> + recd = be32_to_cpu(tpm_cmd.params.getrandom_out.rng_data_len);
> + memcpy(dest, tpm_cmd.params.getrandom_out.rng_data, recd);
> +
> + dest += recd;
> + total += recd;
> + num_bytes -= recd;
> + } while (retries-- && total < max);
> +
> + return total ? total : -EIO;
> +}
> +EXPORT_SYMBOL_GPL(tpm_get_random);
> +
> /* In case vendor provided release function, call it too.*/
>
> void tpm_dev_vendor_release(struct tpm_chip *chip)
> @@ -1427,6 +1476,11 @@ struct tpm_chip *tpm_register_hardware(struct device *dev,
> goto put_device;
> }
>
> + if (sys_add_ppi(&dev->kobj)) {
> + misc_deregister(&chip->vendor.miscdev);
> + goto put_device;
> + }
> +
> chip->bios_dir = tpm_bios_log_setup(devname);
>
> /* Make chip available */
> diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
> index 917f727..02c266a 100644
> --- a/drivers/char/tpm/tpm.h
> +++ b/drivers/char/tpm/tpm.h
> @@ -28,6 +28,12 @@
> #include <linux/io.h>
> #include <linux/tpm.h>
>
> +enum tpm_const {
> + TPM_MINOR = 224, /* officially assigned */
> + TPM_BUFSIZE = 4096,
> + TPM_NUM_DEVICES = 256,
> +};
> +
> enum tpm_timeout {
> TPM_TIMEOUT = 5, /* msecs */
> };
> @@ -94,6 +100,7 @@ struct tpm_vendor_specific {
> bool timeout_adjusted;
> unsigned long duration[3]; /* jiffies */
> bool duration_adjusted;
> + void *data;
>
> wait_queue_head_t read_queue;
> wait_queue_head_t int_queue;
> @@ -269,6 +276,21 @@ struct tpm_pcrextend_in {
> u8 hash[TPM_DIGEST_SIZE];
> }__attribute__((packed));
>
> +/* 128 bytes is an arbitrary cap. This could be as large as TPM_BUFSIZE - 18
> + * bytes, but 128 is still a relatively large number of random bytes and
> + * anything much bigger causes users of struct tpm_cmd_t to start getting
> + * compiler warnings about stack frame size. */
> +#define TPM_MAX_RNG_DATA 128
> +
> +struct tpm_getrandom_out {
> + __be32 rng_data_len;
> + u8 rng_data[TPM_MAX_RNG_DATA];
> +}__attribute__((packed));
> +
> +struct tpm_getrandom_in {
> + __be32 num_bytes;
> +}__attribute__((packed));
> +
> typedef union {
> struct tpm_getcap_params_out getcap_out;
> struct tpm_readpubek_params_out readpubek_out;
> @@ -277,6 +299,8 @@ typedef union {
> struct tpm_pcrread_in pcrread_in;
> struct tpm_pcrread_out pcrread_out;
> struct tpm_pcrextend_in pcrextend_in;
> + struct tpm_getrandom_in getrandom_in;
> + struct tpm_getrandom_out getrandom_out;
> } tpm_cmd_params;
>
> struct tpm_cmd_t {
> @@ -303,15 +327,12 @@ extern int tpm_pm_suspend(struct device *);
> extern int tpm_pm_resume(struct device *);
> extern int wait_for_tpm_stat(struct tpm_chip *, u8, unsigned long,
> wait_queue_head_t *);
> +
> #ifdef CONFIG_ACPI
> -extern struct dentry ** tpm_bios_log_setup(char *);
> -extern void tpm_bios_log_teardown(struct dentry **);
> +extern ssize_t sys_add_ppi(struct kobject *parent);
> #else
> -static inline struct dentry ** tpm_bios_log_setup(char *name)
> -{
> - return NULL;
> -}
> -static inline void tpm_bios_log_teardown(struct dentry **dir)
> +static inline ssize_t sys_add_ppi(struct kobject *parent)
> {
> + return 0;
> }
> #endif
> diff --git a/drivers/char/tpm/tpm_acpi.c b/drivers/char/tpm/tpm_acpi.c
> new file mode 100644
> index 0000000..fe3fa94
> --- /dev/null
> +++ b/drivers/char/tpm/tpm_acpi.c
> @@ -0,0 +1,109 @@
> +/*
> + * Copyright (C) 2005 IBM Corporation
> + *
> + * Authors:
> + * Seiji Munetoh <munetoh@xxxxxxxxxx>
> + * Stefan Berger <stefanb@xxxxxxxxxx>
> + * Reiner Sailer <sailer@xxxxxxxxxxxxxx>
> + * Kylene Hall <kjhall@xxxxxxxxxx>
> + *
> + * Maintained by: <tpmdd-devel@xxxxxxxxxxxxxxxxxxxxx>
> + *
> + * Access to the eventlog extended by the TCG BIOS of PC platform
> + *
> + * 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; either version
> + * 2 of the License, or (at your option) any later version.
> + *
> + */
> +
> +#include <linux/seq_file.h>
> +#include <linux/fs.h>
> +#include <linux/security.h>
> +#include <linux/module.h>
> +#include <linux/slab.h>
> +#include <acpi/acpi.h>
> +
> +#include "tpm.h"
> +#include "tpm_eventlog.h"
> +
> +struct acpi_tcpa {
> + struct acpi_table_header hdr;
> + u16 platform_class;
> + union {
> + struct client_hdr {
> + u32 log_max_len __attribute__ ((packed));
> + u64 log_start_addr __attribute__ ((packed));
> + } client;
> + struct server_hdr {
> + u16 reserved;
> + u64 log_max_len __attribute__ ((packed));
> + u64 log_start_addr __attribute__ ((packed));
> + } server;
> + };
> +};
> +
> +/* read binary bios log */
> +int read_log(struct tpm_bios_log *log)
> +{
> + struct acpi_tcpa *buff;
> + acpi_status status;
> + struct acpi_table_header *virt;
> + u64 len, start;
> +
> + if (log->bios_event_log != NULL) {
> + printk(KERN_ERR
> + "%s: ERROR - Eventlog already initialized\n",
> + __func__);
> + return -EFAULT;
> + }
> +
> + /* Find TCPA entry in RSDT (ACPI_LOGICAL_ADDRESSING) */
> + status = acpi_get_table(ACPI_SIG_TCPA, 1,
> + (struct acpi_table_header **)&buff);
> +
> + if (ACPI_FAILURE(status)) {
> + printk(KERN_ERR "%s: ERROR - Could not get TCPA table\n",
> + __func__);
> + return -EIO;
> + }
> +
> + switch(buff->platform_class) {
> + case BIOS_SERVER:
> + len = buff->server.log_max_len;
> + start = buff->server.log_start_addr;
> + break;
> + case BIOS_CLIENT:
> + default:
> + len = buff->client.log_max_len;
> + start = buff->client.log_start_addr;
> + break;
> + }
> + if (!len) {
> + printk(KERN_ERR "%s: ERROR - TCPA log area empty\n", __func__);
> + return -EIO;
> + }
> +
> + /* malloc EventLog space */
> + log->bios_event_log = kmalloc(len, GFP_KERNEL);
> + if (!log->bios_event_log) {
> + printk("%s: ERROR - Not enough Memory for BIOS measurements\n",
> + __func__);
> + return -ENOMEM;
> + }
> +
> + log->bios_event_log_end = log->bios_event_log + len;
> +
> + virt = acpi_os_map_memory(start, len);
> + if (!virt) {
> + kfree(log->bios_event_log);
> + printk("%s: ERROR - Unable to map memory\n", __func__);
> + return -EIO;
> + }
> +
> + memcpy(log->bios_event_log, virt, len);
> +
> + acpi_os_unmap_memory(virt, len);
> + return 0;
> +}
> diff --git a/drivers/char/tpm/tpm_bios.c b/drivers/char/tpm/tpm_eventlog.c
> similarity index 75%
> rename from drivers/char/tpm/tpm_bios.c
> rename to drivers/char/tpm/tpm_eventlog.c
> index 0636520..84ddc55 100644
> --- a/drivers/char/tpm/tpm_bios.c
> +++ b/drivers/char/tpm/tpm_eventlog.c
> @@ -1,7 +1,8 @@
> /*
> - * Copyright (C) 2005 IBM Corporation
> + * Copyright (C) 2005, 2012 IBM Corporation
> *
> * Authors:
> + * Kent Yoder <key@xxxxxxxxxxxxxxxxxx>
> * Seiji Munetoh <munetoh@xxxxxxxxxx>
> * Stefan Berger <stefanb@xxxxxxxxxx>
> * Reiner Sailer <sailer@xxxxxxxxxxxxxx>
> @@ -9,7 +10,7 @@
> *
> * Maintained by: <tpmdd-devel@xxxxxxxxxxxxxxxxxxxxx>
> *
> - * Access to the eventlog extended by the TCG BIOS of PC platform
> + * Access to the eventlog created by a system's firmware / BIOS
> *
> * This program is free software; you can redistribute it and/or
> * modify it under the terms of the GNU General Public License
> @@ -23,67 +24,10 @@
> #include <linux/security.h>
> #include <linux/module.h>
> #include <linux/slab.h>
> -#include <acpi/acpi.h>
> -#include "tpm.h"
> -
> -#define TCG_EVENT_NAME_LEN_MAX 255
> -#define MAX_TEXT_EVENT 1000 /* Max event string length */
> -#define ACPI_TCPA_SIG "TCPA" /* 0x41504354 /'TCPA' */
> -
> -enum bios_platform_class {
> - BIOS_CLIENT = 0x00,
> - BIOS_SERVER = 0x01,
> -};
> -
> -struct tpm_bios_log {
> - void *bios_event_log;
> - void *bios_event_log_end;
> -};
> -
> -struct acpi_tcpa {
> - struct acpi_table_header hdr;
> - u16 platform_class;
> - union {
> - struct client_hdr {
> - u32 log_max_len __attribute__ ((packed));
> - u64 log_start_addr __attribute__ ((packed));
> - } client;
> - struct server_hdr {
> - u16 reserved;
> - u64 log_max_len __attribute__ ((packed));
> - u64 log_start_addr __attribute__ ((packed));
> - } server;
> - };
> -};
>
> -struct tcpa_event {
> - u32 pcr_index;
> - u32 event_type;
> - u8 pcr_value[20]; /* SHA1 */
> - u32 event_size;
> - u8 event_data[0];
> -};
> +#include "tpm.h"
> +#include "tpm_eventlog.h"
>
> -enum tcpa_event_types {
> - PREBOOT = 0,
> - POST_CODE,
> - UNUSED,
> - NO_ACTION,
> - SEPARATOR,
> - ACTION,
> - EVENT_TAG,
> - SCRTM_CONTENTS,
> - SCRTM_VERSION,
> - CPU_MICROCODE,
> - PLATFORM_CONFIG_FLAGS,
> - TABLE_OF_DEVICES,
> - COMPACT_HASH,
> - IPL,
> - IPL_PARTITION_DATA,
> - NONHOST_CODE,
> - NONHOST_CONFIG,
> - NONHOST_INFO,
> -};
>
> static const char* tcpa_event_type_strings[] = {
> "PREBOOT",
> @@ -106,28 +50,6 @@ static const char* tcpa_event_type_strings[] = {
> "Non-Host Info"
> };
>
> -struct tcpa_pc_event {
> - u32 event_id;
> - u32 event_size;
> - u8 event_data[0];
> -};
> -
> -enum tcpa_pc_event_ids {
> - SMBIOS = 1,
> - BIS_CERT,
> - POST_BIOS_ROM,
> - ESCD,
> - CMOS,
> - NVRAM,
> - OPTION_ROM_EXEC,
> - OPTION_ROM_CONFIG,
> - OPTION_ROM_MICROCODE = 10,
> - S_CRTM_VERSION,
> - S_CRTM_CONTENTS,
> - POST_CONTENTS,
> - HOST_TABLE_OF_DEVICES,
> -};
> -
> static const char* tcpa_pc_event_id_strings[] = {
> "",
> "SMBIOS",
> @@ -358,65 +280,6 @@ static const struct seq_operations tpm_binary_b_measurments_seqops = {
> .show = tpm_binary_bios_measurements_show,
> };
>
> -/* read binary bios log */
> -static int read_log(struct tpm_bios_log *log)
> -{
> - struct acpi_tcpa *buff;
> - acpi_status status;
> - struct acpi_table_header *virt;
> - u64 len, start;
> -
> - if (log->bios_event_log != NULL) {
> - printk(KERN_ERR
> - "%s: ERROR - Eventlog already initialized\n",
> - __func__);
> - return -EFAULT;
> - }
> -
> - /* Find TCPA entry in RSDT (ACPI_LOGICAL_ADDRESSING) */
> - status = acpi_get_table(ACPI_SIG_TCPA, 1,
> - (struct acpi_table_header **)&buff);
> -
> - if (ACPI_FAILURE(status)) {
> - printk(KERN_ERR "%s: ERROR - Could not get TCPA table\n",
> - __func__);
> - return -EIO;
> - }
> -
> - switch(buff->platform_class) {
> - case BIOS_SERVER:
> - len = buff->server.log_max_len;
> - start = buff->server.log_start_addr;
> - break;
> - case BIOS_CLIENT:
> - default:
> - len = buff->client.log_max_len;
> - start = buff->client.log_start_addr;
> - break;
> - }
> - if (!len) {
> - printk(KERN_ERR "%s: ERROR - TCPA log area empty\n", __func__);
> - return -EIO;
> - }
> -
> - /* malloc EventLog space */
> - log->bios_event_log = kmalloc(len, GFP_KERNEL);
> - if (!log->bios_event_log) {
> - printk("%s: ERROR - Not enough Memory for BIOS measurements\n",
> - __func__);
> - return -ENOMEM;
> - }
> -
> - log->bios_event_log_end = log->bios_event_log + len;
> -
> - virt = acpi_os_map_memory(start, len);
> -
> - memcpy(log->bios_event_log, virt, len);
> -
> - acpi_os_unmap_memory(virt, len);
> - return 0;
> -}
> -
> static int tpm_ascii_bios_measurements_open(struct inode *inode,
> struct file *file)
> {
> diff --git a/drivers/char/tpm/tpm_eventlog.h b/drivers/char/tpm/tpm_eventlog.h
> new file mode 100644
> index 0000000..e7da086
> --- /dev/null
> +++ b/drivers/char/tpm/tpm_eventlog.h
> @@ -0,0 +1,86 @@
> +
> +#ifndef __TPM_EVENTLOG_H__
> +#define __TPM_EVENTLOG_H__
> +
> +#define TCG_EVENT_NAME_LEN_MAX 255
> +#define MAX_TEXT_EVENT 1000 /* Max event string length */
> +#define ACPI_TCPA_SIG "TCPA" /* 0x41504354 /'TCPA' */
> +
> +enum bios_platform_class {
> + BIOS_CLIENT = 0x00,
> + BIOS_SERVER = 0x01,
> +};
> +
> +struct tpm_bios_log {
> + void *bios_event_log;
> + void *bios_event_log_end;
> +};
> +
> +struct tcpa_event {
> + u32 pcr_index;
> + u32 event_type;
> + u8 pcr_value[20]; /* SHA1 */
> + u32 event_size;
> + u8 event_data[0];
> +};
> +
> +enum tcpa_event_types {
> + PREBOOT = 0,
> + POST_CODE,
> + UNUSED,
> + NO_ACTION,
> + SEPARATOR,
> + ACTION,
> + EVENT_TAG,
> + SCRTM_CONTENTS,
> + SCRTM_VERSION,
> + CPU_MICROCODE,
> + PLATFORM_CONFIG_FLAGS,
> + TABLE_OF_DEVICES,
> + COMPACT_HASH,
> + IPL,
> + IPL_PARTITION_DATA,
> + NONHOST_CODE,
> + NONHOST_CONFIG,
> + NONHOST_INFO,
> +};
> +
> +struct tcpa_pc_event {
> + u32 event_id;
> + u32 event_size;
> + u8 event_data[0];
> +};
> +
> +enum tcpa_pc_event_ids {
> + SMBIOS = 1,
> + BIS_CERT,
> + POST_BIOS_ROM,
> + ESCD,
> + CMOS,
> + NVRAM,
> + OPTION_ROM_EXEC,
> + OPTION_ROM_CONFIG,
> + OPTION_ROM_MICROCODE = 10,
> + S_CRTM_VERSION,
> + S_CRTM_CONTENTS,
> + POST_CONTENTS,
> + HOST_TABLE_OF_DEVICES,
> +};
> +
> +int read_log(struct tpm_bios_log *log);
> +
> +#if defined(CONFIG_TCG_IBMVTPM) || defined(CONFIG_TCG_IBMVTPM_MODULE) || \
> + defined(CONFIG_ACPI)
> +extern struct dentry **tpm_bios_log_setup(char *);
> +extern void tpm_bios_log_teardown(struct dentry **);
> +#else
> +static inline struct dentry **tpm_bios_log_setup(char *name)
> +{
> + return NULL;
> +}
> +static inline void tpm_bios_log_teardown(struct dentry **dir)
> +{
> +}
> +#endif
> +
> +#endif
> diff --git a/drivers/char/tpm/tpm_i2c_infineon.c b/drivers/char/tpm/tpm_i2c_infineon.c
> new file mode 100644
> index 0000000..5a831ae
> --- /dev/null
> +++ b/drivers/char/tpm/tpm_i2c_infineon.c
> @@ -0,0 +1,695 @@
> +/*
> + * Copyright (C) 2012 Infineon Technologies
> + *
> + * Authors:
> + * Peter Huewe <peter.huewe@xxxxxxxxxxxx>
> + *
> + * Device driver for TCG/TCPA TPM (trusted platform module).
> + * Specifications at www.trustedcomputinggroup.org
> + *
> + * This device driver implements the TPM interface as defined in
> + * the TCG TPM Interface Spec version 1.2, revision 1.0 and the
> + * Infineon I2C Protocol Stack Specification v0.20.
> + *
> + * It is based on the original tpm_tis device driver from Leendert van
> + * Dorn and Kyleen Hall.
> + *
> + * 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 <linux/init.h>
> +#include <linux/i2c.h>
> +#include <linux/module.h>
> +#include <linux/moduleparam.h>
> +#include <linux/wait.h>
> +#include "tpm.h"
> +
> +/* max. buffer size supported by our TPM */
> +#define TPM_BUFSIZE 1260
> +
> +/* max. number of iterations after I2C NAK */
> +#define MAX_COUNT 3
> +
> +#define SLEEP_DURATION_LOW 55
> +#define SLEEP_DURATION_HI 65
> +
> +/* max. number of iterations after I2C NAK for 'long' commands
> + * we need this especially for sending TPM_READY, since the cleanup after the
> + * transtion to the ready state may take some time, but it is unpredictable
> + * how long it will take.
> + */
> +#define MAX_COUNT_LONG 50
> +
> +#define SLEEP_DURATION_LONG_LOW 200
> +#define SLEEP_DURATION_LONG_HI 220
> +
> +/* After sending TPM_READY to 'reset' the TPM we have to sleep even longer */
> +#define SLEEP_DURATION_RESET_LOW 2400
> +#define SLEEP_DURATION_RESET_HI 2600
> +
> +/* we want to use usleep_range instead of msleep for the 5ms TPM_TIMEOUT */
> +#define TPM_TIMEOUT_US_LOW (TPM_TIMEOUT * 1000)
> +#define TPM_TIMEOUT_US_HI (TPM_TIMEOUT_US_LOW + 2000)
> +
> +/* expected value for DIDVID register */
> +#define TPM_TIS_I2C_DID_VID 0x000b15d1L
> +
> +/* Structure to store I2C TPM specific stuff */
> +struct tpm_inf_dev {
> + struct i2c_client *client;
> + u8 buf[TPM_BUFSIZE + sizeof(u8)]; /* max. buffer size + addr */
> + struct tpm_chip *chip;
> +};
> +
> +static struct tpm_inf_dev tpm_dev;
> +static struct i2c_driver tpm_tis_i2c_driver;
> +
> +/*
> + * iic_tpm_read() - read from TPM register
> + * @addr: register address to read from
> + * @buffer: provided by caller
> + * @len: number of bytes to read
> + *
> + * Read len bytes from TPM register and put them into
> + * buffer (little-endian format, i.e. first byte is put into buffer[0]).
> + *
> + * NOTE: TPM is big-endian for multi-byte values. Multi-byte
> + * values have to be swapped.
> + *
> + * NOTE: We can't unfortunately use the combined read/write functions
> + * provided by the i2c core as the TPM currently does not support the
> + * repeated start condition and due to it's special requirements.
> + * The i2c_smbus* functions do not work for this chip.
> + *
> + * Return -EIO on error, 0 on success.
> + */
> +static int iic_tpm_read(u8 addr, u8 *buffer, size_t len)
> +{
> +
> + struct i2c_msg msg1 = { tpm_dev.client->addr, 0, 1, &addr };
> + struct i2c_msg msg2 = { tpm_dev.client->addr, I2C_M_RD, len, buffer };
> +
> + int rc;
> + int count;
> +
> + /* Lock the adapter for the duration of the whole sequence. */
> + if (!tpm_dev.client->adapter->algo->master_xfer)
> + return -EOPNOTSUPP;
> + i2c_lock_adapter(tpm_dev.client->adapter);
> +
> + for (count = 0; count < MAX_COUNT; count++) {
> + rc = __i2c_transfer(tpm_dev.client->adapter, &msg1, 1);
> + if (rc > 0)
> + break; /* break here to skip sleep */
> +
> + usleep_range(SLEEP_DURATION_LOW, SLEEP_DURATION_HI);
> + }
> +
> + if (rc <= 0)
> + goto out;
> +
> + /* After the TPM has successfully received the register address it needs
> + * some time, thus we're sleeping here again, before retrieving the data
> + */
> + for (count = 0; count < MAX_COUNT; count++) {
> + usleep_range(SLEEP_DURATION_LOW, SLEEP_DURATION_HI);
> + rc = __i2c_transfer(tpm_dev.client->adapter, &msg2, 1);
> + if (rc > 0)
> + break;
> +
> + }
> +
> +out:
> + i2c_unlock_adapter(tpm_dev.client->adapter);
> + if (rc <= 0)
> + return -EIO;
> +
> + return 0;
> +}
> +
> +static int iic_tpm_write_generic(u8 addr, u8 *buffer, size_t len,
> + unsigned int sleep_low,
> + unsigned int sleep_hi, u8 max_count)
> +{
> + int rc = -EIO;
> + int count;
> +
> + struct i2c_msg msg1 = { tpm_dev.client->addr, 0, len + 1, tpm_dev.buf };
> +
> + if (len > TPM_BUFSIZE)
> + return -EINVAL;
> +
> + if (!tpm_dev.client->adapter->algo->master_xfer)
> + return -EOPNOTSUPP;
> + i2c_lock_adapter(tpm_dev.client->adapter);
> +
> + /* prepend the 'register address' to the buffer */
> + tpm_dev.buf[0] = addr;
> + memcpy(&(tpm_dev.buf[1]), buffer, len);
> +
> + /*
> + * NOTE: We have to use these special mechanisms here and unfortunately
> + * cannot rely on the standard behavior of i2c_transfer.
> + */
> + for (count = 0; count < max_count; count++) {
> + rc = __i2c_transfer(tpm_dev.client->adapter, &msg1, 1);
> + if (rc > 0)
> + break;
> +
> + usleep_range(sleep_low, sleep_hi);
> + }
> +
> + i2c_unlock_adapter(tpm_dev.client->adapter);
> + if (rc <= 0)
> + return -EIO;
> +
> + return 0;
> +}
> +
> +/*
> + * iic_tpm_write() - write to TPM register
> + * @addr: register address to write to
> + * @buffer: containing data to be written
> + * @len: number of bytes to write
> + *
> + * Write len bytes from provided buffer to TPM register (little
> + * endian format, i.e. buffer[0] is written as first byte).
> + *
> + * NOTE: TPM is big-endian for multi-byte values. Multi-byte
> + * values have to be swapped.
> + *
> + * NOTE: use this function instead of the iic_tpm_write_generic function.
> + *
> + * Return -EIO on error, 0 on success
> + */
> +static int iic_tpm_write(u8 addr, u8 *buffer, size_t len)
> +{
> + return iic_tpm_write_generic(addr, buffer, len, SLEEP_DURATION_LOW,
> + SLEEP_DURATION_HI, MAX_COUNT);
> +}
> +
> +/*
> + * This function is needed especially for the cleanup situation after
> + * sending TPM_READY
> + * */
> +static int iic_tpm_write_long(u8 addr, u8 *buffer, size_t len)
> +{
> + return iic_tpm_write_generic(addr, buffer, len, SLEEP_DURATION_LONG_LOW,
> + SLEEP_DURATION_LONG_HI, MAX_COUNT_LONG);
> +}
> +
> +enum tis_access {
> + TPM_ACCESS_VALID = 0x80,
> + TPM_ACCESS_ACTIVE_LOCALITY = 0x20,
> + TPM_ACCESS_REQUEST_PENDING = 0x04,
> + TPM_ACCESS_REQUEST_USE = 0x02,
> +};
> +
> +enum tis_status {
> + TPM_STS_VALID = 0x80,
> + TPM_STS_COMMAND_READY = 0x40,
> + TPM_STS_GO = 0x20,
> + TPM_STS_DATA_AVAIL = 0x10,
> + TPM_STS_DATA_EXPECT = 0x08,
> +};
> +
> +enum tis_defaults {
> + TIS_SHORT_TIMEOUT = 750, /* ms */
> + TIS_LONG_TIMEOUT = 2000, /* 2 sec */
> +};
> +
> +#define TPM_ACCESS(l) (0x0000 | ((l) << 4))
> +#define TPM_STS(l) (0x0001 | ((l) << 4))
> +#define TPM_DATA_FIFO(l) (0x0005 | ((l) << 4))
> +#define TPM_DID_VID(l) (0x0006 | ((l) << 4))
> +
> +static int check_locality(struct tpm_chip *chip, int loc)
> +{
> + u8 buf;
> + int rc;
> +
> + rc = iic_tpm_read(TPM_ACCESS(loc), &buf, 1);
> + if (rc < 0)
> + return rc;
> +
> + if ((buf & (TPM_ACCESS_ACTIVE_LOCALITY | TPM_ACCESS_VALID)) ==
> + (TPM_ACCESS_ACTIVE_LOCALITY | TPM_ACCESS_VALID)) {
> + chip->vendor.locality = loc;
> + return loc;
> + }
> +
> + return -EIO;
> +}
> +
> +/* implementation similar to tpm_tis */
> +static void release_locality(struct tpm_chip *chip, int loc, int force)
> +{
> + u8 buf;
> + if (iic_tpm_read(TPM_ACCESS(loc), &buf, 1) < 0)
> + return;
> +
> + if (force || (buf & (TPM_ACCESS_REQUEST_PENDING | TPM_ACCESS_VALID)) ==
> + (TPM_ACCESS_REQUEST_PENDING | TPM_ACCESS_VALID)) {
> + buf = TPM_ACCESS_ACTIVE_LOCALITY;
> + iic_tpm_write(TPM_ACCESS(loc), &buf, 1);
> + }
> +}
> +
> +static int request_locality(struct tpm_chip *chip, int loc)
> +{
> + unsigned long stop;
> + u8 buf = TPM_ACCESS_REQUEST_USE;
> +
> + if (check_locality(chip, loc) >= 0)
> + return loc;
> +
> + iic_tpm_write(TPM_ACCESS(loc), &buf, 1);
> +
> + /* wait for burstcount */
> + stop = jiffies + chip->vendor.timeout_a;
> + do {
> + if (check_locality(chip, loc) >= 0)
> + return loc;
> + usleep_range(TPM_TIMEOUT_US_LOW, TPM_TIMEOUT_US_HI);
> + } while (time_before(jiffies, stop));
> +
> + return -ETIME;
> +}
> +
> +static u8 tpm_tis_i2c_status(struct tpm_chip *chip)
> +{
> + /* NOTE: since I2C read may fail, return 0 in this case --> time-out */
> + u8 buf;
> + if (iic_tpm_read(TPM_STS(chip->vendor.locality), &buf, 1) < 0)
> + return 0;
> + else
> + return buf;
> +}
> +
> +static void tpm_tis_i2c_ready(struct tpm_chip *chip)
> +{
> + /* this causes the current command to be aborted */
> + u8 buf = TPM_STS_COMMAND_READY;
> + iic_tpm_write_long(TPM_STS(chip->vendor.locality), &buf, 1);
> +}
> +
> +static ssize_t get_burstcount(struct tpm_chip *chip)
> +{
> + unsigned long stop;
> + ssize_t burstcnt;
> + u8 buf[3];
> +
> + /* wait for burstcount */
> + /* which timeout value, spec has 2 answers (c & d) */
> + stop = jiffies + chip->vendor.timeout_d;
> + do {
> + /* Note: STS is little endian */
> + if (iic_tpm_read(TPM_STS(chip->vendor.locality)+1, buf, 3) < 0)
> + burstcnt = 0;
> + else
> + burstcnt = (buf[2] << 16) + (buf[1] << 8) + buf[0];
> +
> + if (burstcnt)
> + return burstcnt;
> +
> + usleep_range(TPM_TIMEOUT_US_LOW, TPM_TIMEOUT_US_HI);
> + } while (time_before(jiffies, stop));
> + return -EBUSY;
> +}
> +
> +static int wait_for_stat(struct tpm_chip *chip, u8 mask, unsigned long timeout,
> + int *status)
> +{
> + unsigned long stop;
> +
> + /* check current status */
> + *status = tpm_tis_i2c_status(chip);
> + if ((*status & mask) == mask)
> + return 0;
> +
> + stop = jiffies + timeout;
> + do {
> + /* since we just checked the status, give the TPM some time */
> + usleep_range(TPM_TIMEOUT_US_LOW, TPM_TIMEOUT_US_HI);
> + *status = tpm_tis_i2c_status(chip);
> + if ((*status & mask) == mask)
> + return 0;
> +
> + } while (time_before(jiffies, stop));
> +
> + return -ETIME;
> +}
> +
> +static int recv_data(struct tpm_chip *chip, u8 *buf, size_t count)
> +{
> + size_t size = 0;
> + ssize_t burstcnt;
> + u8 retries = 0;
> + int rc;
> +
> + while (size < count) {
> + burstcnt = get_burstcount(chip);
> +
> + /* burstcnt < 0 = TPM is busy */
> + if (burstcnt < 0)
> + return burstcnt;
> +
> + /* limit received data to max. left */
> + if (burstcnt > (count - size))
> + burstcnt = count - size;
> +
> + rc = iic_tpm_read(TPM_DATA_FIFO(chip->vendor.locality),
> + &(buf[size]), burstcnt);
> + if (rc == 0)
> + size += burstcnt;
> + else if (rc < 0)
> + retries++;
> +
> + /* avoid endless loop in case of broken HW */
> + if (retries > MAX_COUNT_LONG)
> + return -EIO;
> +
> + }
> + return size;
> +}
> +
> +static int tpm_tis_i2c_recv(struct tpm_chip *chip, u8 *buf, size_t count)
> +{
> + int size = 0;
> + int expected, status;
> +
> + if (count < TPM_HEADER_SIZE) {
> + size = -EIO;
> + goto out;
> + }
> +
> + /* read first 10 bytes, including tag, paramsize, and result */
> + size = recv_data(chip, buf, TPM_HEADER_SIZE);
> + if (size < TPM_HEADER_SIZE) {
> + dev_err(chip->dev, "Unable to read header\n");
> + goto out;
> + }
> +
> + expected = be32_to_cpu(*(__be32 *)(buf + 2));
> + if ((size_t) expected > count) {
> + size = -EIO;
> + goto out;
> + }
> +
> + size += recv_data(chip, &buf[TPM_HEADER_SIZE],
> + expected - TPM_HEADER_SIZE);
> + if (size < expected) {
> + dev_err(chip->dev, "Unable to read remainder of result\n");
> + size = -ETIME;
> + goto out;
> + }
> +
> + wait_for_stat(chip, TPM_STS_VALID, chip->vendor.timeout_c, &status);
> + if (status & TPM_STS_DATA_AVAIL) { /* retry? */
> + dev_err(chip->dev, "Error left over data\n");
> + size = -EIO;
> + goto out;
> + }
> +
> +out:
> + tpm_tis_i2c_ready(chip);
> + /* The TPM needs some time to clean up here,
> + * so we sleep rather than keeping the bus busy
> + */
> + usleep_range(SLEEP_DURATION_RESET_LOW, SLEEP_DURATION_RESET_HI);
> + release_locality(chip, chip->vendor.locality, 0);
> + return size;
> +}
> +
> +static int tpm_tis_i2c_send(struct tpm_chip *chip, u8 *buf, size_t len)
> +{
> + int rc, status;
> + ssize_t burstcnt;
> + size_t count = 0;
> + u8 retries = 0;
> + u8 sts = TPM_STS_GO;
> +
> + if (len > TPM_BUFSIZE)
> + return -E2BIG; /* command is too long for our tpm, sorry */
> +
> + if (request_locality(chip, 0) < 0)
> + return -EBUSY;
> +
> + status = tpm_tis_i2c_status(chip);
> + if ((status & TPM_STS_COMMAND_READY) == 0) {
> + tpm_tis_i2c_ready(chip);
> + if (wait_for_stat
> + (chip, TPM_STS_COMMAND_READY,
> + chip->vendor.timeout_b, &status) < 0) {
> + rc = -ETIME;
> + goto out_err;
> + }
> + }
> +
> + while (count < len - 1) {
> + burstcnt = get_burstcount(chip);
> +
> + /* burstcnt < 0 = TPM is busy */
> + if (burstcnt < 0)
> + return burstcnt;
> +
> + if (burstcnt > (len - 1 - count))
> + burstcnt = len - 1 - count;
> +
> + rc = iic_tpm_write(TPM_DATA_FIFO(chip->vendor.locality),
> + &(buf[count]), burstcnt);
> + if (rc == 0)
> + count += burstcnt;
> + else if (rc < 0)
> + retries++;
> +
> + /* avoid endless loop in case of broken HW */
> + if (retries > MAX_COUNT_LONG) {
> + rc = -EIO;
> + goto out_err;
> + }
> +
> + wait_for_stat(chip, TPM_STS_VALID,
> + chip->vendor.timeout_c, &status);
> +
> + if ((status & TPM_STS_DATA_EXPECT) == 0) {
> + rc = -EIO;
> + goto out_err;
> + }
> +
> + }
> +
> + /* write last byte */
> + iic_tpm_write(TPM_DATA_FIFO(chip->vendor.locality), &(buf[count]), 1);
> + wait_for_stat(chip, TPM_STS_VALID, chip->vendor.timeout_c, &status);
> + if ((status & TPM_STS_DATA_EXPECT) != 0) {
> + rc = -EIO;
> + goto out_err;
> + }
> +
> + /* go and do it */
> + iic_tpm_write(TPM_STS(chip->vendor.locality), &sts, 1);
> +
> + return len;
> +out_err:
> + tpm_tis_i2c_ready(chip);
> + /* The TPM needs some time to clean up here,
> + * so we sleep rather than keeping the bus busy
> + */
> + usleep_range(SLEEP_DURATION_RESET_LOW, SLEEP_DURATION_RESET_HI);
> + release_locality(chip, chip->vendor.locality, 0);
> + return rc;
> +}
> +
> +static const struct file_operations tis_ops = {
> + .owner = THIS_MODULE,
> + .llseek = no_llseek,
> + .open = tpm_open,
> + .read = tpm_read,
> + .write = tpm_write,
> + .release = tpm_release,
> +};
> +
> +static DEVICE_ATTR(pubek, S_IRUGO, tpm_show_pubek, NULL);
> +static DEVICE_ATTR(pcrs, S_IRUGO, tpm_show_pcrs, NULL);
> +static DEVICE_ATTR(enabled, S_IRUGO, tpm_show_enabled, NULL);
> +static DEVICE_ATTR(active, S_IRUGO, tpm_show_active, NULL);
> +static DEVICE_ATTR(owned, S_IRUGO, tpm_show_owned, NULL);
> +static DEVICE_ATTR(temp_deactivated, S_IRUGO, tpm_show_temp_deactivated, NULL);
> +static DEVICE_ATTR(caps, S_IRUGO, tpm_show_caps_1_2, NULL);
> +static DEVICE_ATTR(cancel, S_IWUSR | S_IWGRP, NULL, tpm_store_cancel);
> +static DEVICE_ATTR(durations, S_IRUGO, tpm_show_durations, NULL);
> +static DEVICE_ATTR(timeouts, S_IRUGO, tpm_show_timeouts, NULL);
> +
> +static struct attribute *tis_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 struct attribute_group tis_attr_grp = {
> + .attrs = tis_attrs
> +};
> +
> +static struct tpm_vendor_specific tpm_tis_i2c = {
> + .status = tpm_tis_i2c_status,
> + .recv = tpm_tis_i2c_recv,
> + .send = tpm_tis_i2c_send,
> + .cancel = tpm_tis_i2c_ready,
> + .req_complete_mask = TPM_STS_DATA_AVAIL | TPM_STS_VALID,
> + .req_complete_val = TPM_STS_DATA_AVAIL | TPM_STS_VALID,
> + .req_canceled = TPM_STS_COMMAND_READY,
> + .attr_group = &tis_attr_grp,
> + .miscdev.fops = &tis_ops,
> +};
> +
> +static int __devinit tpm_tis_i2c_init(struct device *dev)
> +{
> + u32 vendor;
> + int rc = 0;
> + struct tpm_chip *chip;
> +
> + chip = tpm_register_hardware(dev, &tpm_tis_i2c);
> + if (!chip) {
> + rc = -ENODEV;
> + goto out_err;
> + }
> +
> + /* Disable interrupts */
> + chip->vendor.irq = 0;
> +
> + /* Default timeouts */
> + chip->vendor.timeout_a = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
> + chip->vendor.timeout_b = msecs_to_jiffies(TIS_LONG_TIMEOUT);
> + chip->vendor.timeout_c = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
> + chip->vendor.timeout_d = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
> +
> + if (request_locality(chip, 0) != 0) {
> + rc = -ENODEV;
> + goto out_vendor;
> + }
> +
> + /* read four bytes from DID_VID register */
> + if (iic_tpm_read(TPM_DID_VID(0), (u8 *)&vendor, 4) < 0) {
> + rc = -EIO;
> + goto out_release;
> + }
> +
> + /* create DID_VID register value, after swapping to little-endian */
> + vendor = be32_to_cpu((__be32) vendor);
> +
> + if (vendor != TPM_TIS_I2C_DID_VID) {
> + rc = -ENODEV;
> + goto out_release;
> + }
> +
> + dev_info(dev, "1.2 TPM (device-id 0x%X)\n", vendor >> 16);
> +
> + INIT_LIST_HEAD(&chip->vendor.list);
> + tpm_dev.chip = chip;
> +
> + tpm_get_timeouts(chip);
> + tpm_do_selftest(chip);
> +
> + return 0;
> +
> +out_release:
> + release_locality(chip, chip->vendor.locality, 1);
> +
> +out_vendor:
> + /* close file handles */
> + tpm_dev_vendor_release(chip);
> +
> + /* remove hardware */
> + tpm_remove_hardware(chip->dev);
> +
> + /* reset these pointers, otherwise we oops */
> + chip->dev->release = NULL;
> + chip->release = NULL;
> + tpm_dev.client = NULL;
> + dev_set_drvdata(chip->dev, chip);
> +out_err:
> + return rc;
> +}
> +
> +static const struct i2c_device_id tpm_tis_i2c_table[] = {
> + {"tpm_i2c_infineon", 0},
> + {},
> +};
> +
> +MODULE_DEVICE_TABLE(i2c, tpm_tis_i2c_table);
> +static SIMPLE_DEV_PM_OPS(tpm_tis_i2c_ops, tpm_pm_suspend, tpm_pm_resume);
> +
> +static int __devinit tpm_tis_i2c_probe(struct i2c_client *client,
> + const struct i2c_device_id *id)
> +{
> + int rc;
> + if (tpm_dev.client != NULL)
> + return -EBUSY; /* We only support one client */
> +
> + if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
> + dev_err(&client->dev,
> + "no algorithms associated to the i2c bus\n");
> + return -ENODEV;
> + }
> +
> + client->driver = &tpm_tis_i2c_driver;
> + tpm_dev.client = client;
> + rc = tpm_tis_i2c_init(&client->dev);
> + if (rc != 0) {
> + client->driver = NULL;
> + tpm_dev.client = NULL;
> + rc = -ENODEV;
> + }
> + return rc;
> +}
> +
> +static int __devexit tpm_tis_i2c_remove(struct i2c_client *client)
> +{
> + struct tpm_chip *chip = tpm_dev.chip;
> + release_locality(chip, chip->vendor.locality, 1);
> +
> + /* close file handles */
> + tpm_dev_vendor_release(chip);
> +
> + /* remove hardware */
> + tpm_remove_hardware(chip->dev);
> +
> + /* reset these pointers, otherwise we oops */
> + chip->dev->release = NULL;
> + chip->release = NULL;
> + tpm_dev.client = NULL;
> + dev_set_drvdata(chip->dev, chip);
> +
> + return 0;
> +}
> +
> +static struct i2c_driver tpm_tis_i2c_driver = {
> +
> + .id_table = tpm_tis_i2c_table,
> + .probe = tpm_tis_i2c_probe,
> + .remove = tpm_tis_i2c_remove,
> + .driver = {
> + .name = "tpm_i2c_infineon",
> + .owner = THIS_MODULE,
> + .pm = &tpm_tis_i2c_ops,
> + },
> +};
> +
> +module_i2c_driver(tpm_tis_i2c_driver);
> +MODULE_AUTHOR("Peter Huewe <peter.huewe@xxxxxxxxxxxx>");
> +MODULE_DESCRIPTION("TPM TIS I2C Infineon Driver");
> +MODULE_VERSION("2.1.5");
> +MODULE_LICENSE("GPL");
> diff --git a/drivers/char/tpm/tpm_ibmvtpm.c b/drivers/char/tpm/tpm_ibmvtpm.c
> new file mode 100644
> index 0000000..efc4ab3
> --- /dev/null
> +++ b/drivers/char/tpm/tpm_ibmvtpm.c
> @@ -0,0 +1,749 @@
> +/*
> + * Copyright (C) 2012 IBM Corporation
> + *
> + * Author: Ashley Lai <adlai@xxxxxxxxxx>
> + *
> + * Maintained by: <tpmdd-devel@xxxxxxxxxxxxxxxxxxxxx>
> + *
> + * Device driver for TCG/TCPA TPM (trusted platform module).
> + * Specifications at www.trustedcomputinggroup.org
> + *
> + * 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 <linux/dma-mapping.h>
> +#include <linux/dmapool.h>
> +#include <linux/slab.h>
> +#include <asm/vio.h>
> +#include <asm/irq.h>
> +#include <linux/types.h>
> +#include <linux/list.h>
> +#include <linux/spinlock.h>
> +#include <linux/interrupt.h>
> +#include <linux/wait.h>
> +#include <asm/prom.h>
> +
> +#include "tpm.h"
> +#include "tpm_ibmvtpm.h"
> +
> +static const char tpm_ibmvtpm_driver_name[] = "tpm_ibmvtpm";
> +
> +static struct vio_device_id tpm_ibmvtpm_device_table[] __devinitdata = {
> + { "IBM,vtpm", "IBM,vtpm"},
> + { "", "" }
> +};
> +MODULE_DEVICE_TABLE(vio, tpm_ibmvtpm_device_table);
> +
> +DECLARE_WAIT_QUEUE_HEAD(wq);
> +
> +/**
> + * ibmvtpm_send_crq - Send a CRQ request
> + * @vdev: vio device struct
> + * @w1: first word
> + * @w2: second word
> + *
> + * Return value:
> + * 0 -Sucess
> + * Non-zero - Failure
> + */
> +static int ibmvtpm_send_crq(struct vio_dev *vdev, u64 w1, u64 w2)
> +{
> + return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, w1, w2);
> +}
> +
> +/**
> + * ibmvtpm_get_data - Retrieve ibm vtpm data
> + * @dev: device struct
> + *
> + * Return value:
> + * vtpm device struct
> + */
> +static struct ibmvtpm_dev *ibmvtpm_get_data(const struct device *dev)
> +{
> + struct tpm_chip *chip = dev_get_drvdata(dev);
> + if (chip)
> + return (struct ibmvtpm_dev *)chip->vendor.data;
> + return NULL;
> +}
> +
> +/**
> + * tpm_ibmvtpm_recv - Receive data after send
> + * @chip: tpm chip struct
> + * @buf: buffer to read
> + * count: size of buffer
> + *
> + * Return value:
> + * Number of bytes read
> + */
> +static int tpm_ibmvtpm_recv(struct tpm_chip *chip, u8 *buf, size_t count)
> +{
> + struct ibmvtpm_dev *ibmvtpm;
> + u16 len;
> +
> + ibmvtpm = (struct ibmvtpm_dev *)chip->vendor.data;
> +
> + if (!ibmvtpm->rtce_buf) {
> + dev_err(ibmvtpm->dev, "ibmvtpm device is not ready\n");
> + return 0;
> + }
> +
> + wait_event_interruptible(wq, ibmvtpm->crq_res.len != 0);
> +
> + if (count < ibmvtpm->crq_res.len) {
> + dev_err(ibmvtpm->dev,
> + "Invalid size in recv: count=%ld, crq_size=%d\n",
> + count, ibmvtpm->crq_res.len);
> + return -EIO;
> + }
> +
> + spin_lock(&ibmvtpm->rtce_lock);
> + memcpy((void *)buf, (void *)ibmvtpm->rtce_buf, ibmvtpm->crq_res.len);
> + memset(ibmvtpm->rtce_buf, 0, ibmvtpm->crq_res.len);
> + ibmvtpm->crq_res.valid = 0;
> + ibmvtpm->crq_res.msg = 0;
> + len = ibmvtpm->crq_res.len;
> + ibmvtpm->crq_res.len = 0;
> + spin_unlock(&ibmvtpm->rtce_lock);
> + return len;
> +}
> +
> +/**
> + * tpm_ibmvtpm_send - Send tpm request
> + * @chip: tpm chip struct
> + * @buf: buffer contains data to send
> + * count: size of buffer
> + *
> + * Return value:
> + * Number of bytes sent
> + */
> +static int tpm_ibmvtpm_send(struct tpm_chip *chip, u8 *buf, size_t count)
> +{
> + struct ibmvtpm_dev *ibmvtpm;
> + struct ibmvtpm_crq crq;
> + u64 *word = (u64 *) &crq;
> + int rc;
> +
> + ibmvtpm = (struct ibmvtpm_dev *)chip->vendor.data;
> +
> + if (!ibmvtpm->rtce_buf) {
> + dev_err(ibmvtpm->dev, "ibmvtpm device is not ready\n");
> + return 0;
> + }
> +
> + if (count > ibmvtpm->rtce_size) {
> + dev_err(ibmvtpm->dev,
> + "Invalid size in send: count=%ld, rtce_size=%d\n",
> + count, ibmvtpm->rtce_size);
> + return -EIO;
> + }
> +
> + spin_lock(&ibmvtpm->rtce_lock);
> + memcpy((void *)ibmvtpm->rtce_buf, (void *)buf, count);
> + crq.valid = (u8)IBMVTPM_VALID_CMD;
> + crq.msg = (u8)VTPM_TPM_COMMAND;
> + crq.len = (u16)count;
> + crq.data = ibmvtpm->rtce_dma_handle;
> +
> + rc = ibmvtpm_send_crq(ibmvtpm->vdev, word[0], word[1]);
> + if (rc != H_SUCCESS) {
> + dev_err(ibmvtpm->dev, "tpm_ibmvtpm_send failed rc=%d\n", rc);
> + rc = 0;
> + } else
> + rc = count;
> +
> + spin_unlock(&ibmvtpm->rtce_lock);
> + return rc;
> +}
> +
> +static void tpm_ibmvtpm_cancel(struct tpm_chip *chip)
> +{
> + return;
> +}
> +
> +static u8 tpm_ibmvtpm_status(struct tpm_chip *chip)
> +{
> + return 0;
> +}
> +
> +/**
> + * ibmvtpm_crq_get_rtce_size - Send a CRQ request to get rtce size
> + * @ibmvtpm: vtpm device struct
> + *
> + * Return value:
> + * 0 - Success
> + * Non-zero - Failure
> + */
> +static int ibmvtpm_crq_get_rtce_size(struct ibmvtpm_dev *ibmvtpm)
> +{
> + struct ibmvtpm_crq crq;
> + u64 *buf = (u64 *) &crq;
> + int rc;
> +
> + crq.valid = (u8)IBMVTPM_VALID_CMD;
> + crq.msg = (u8)VTPM_GET_RTCE_BUFFER_SIZE;
> +
> + rc = ibmvtpm_send_crq(ibmvtpm->vdev, buf[0], buf[1]);
> + if (rc != H_SUCCESS)
> + dev_err(ibmvtpm->dev,
> + "ibmvtpm_crq_get_rtce_size failed rc=%d\n", rc);
> +
> + return rc;
> +}
> +
> +/**
> + * ibmvtpm_crq_get_version - Send a CRQ request to get vtpm version
> + * - Note that this is vtpm version and not tpm version
> + * @ibmvtpm: vtpm device struct
> + *
> + * Return value:
> + * 0 - Success
> + * Non-zero - Failure
> + */
> +static int ibmvtpm_crq_get_version(struct ibmvtpm_dev *ibmvtpm)
> +{
> + struct ibmvtpm_crq crq;
> + u64 *buf = (u64 *) &crq;
> + int rc;
> +
> + crq.valid = (u8)IBMVTPM_VALID_CMD;
> + crq.msg = (u8)VTPM_GET_VERSION;
> +
> + rc = ibmvtpm_send_crq(ibmvtpm->vdev, buf[0], buf[1]);
> + if (rc != H_SUCCESS)
> + dev_err(ibmvtpm->dev,
> + "ibmvtpm_crq_get_version failed rc=%d\n", rc);
> +
> + return rc;
> +}
> +
> +/**
> + * ibmvtpm_crq_send_init_complete - Send a CRQ initialize complete message
> + * @ibmvtpm: vtpm device struct
> + *
> + * Return value:
> + * 0 - Success
> + * Non-zero - Failure
> + */
> +static int ibmvtpm_crq_send_init_complete(struct ibmvtpm_dev *ibmvtpm)
> +{
> + int rc;
> +
> + rc = ibmvtpm_send_crq(ibmvtpm->vdev, INIT_CRQ_COMP_CMD, 0);
> + if (rc != H_SUCCESS)
> + dev_err(ibmvtpm->dev,
> + "ibmvtpm_crq_send_init_complete failed rc=%d\n", rc);
> +
> + return rc;
> +}
> +
> +/**
> + * ibmvtpm_crq_send_init - Send a CRQ initialize message
> + * @ibmvtpm: vtpm device struct
> + *
> + * Return value:
> + * 0 - Success
> + * Non-zero - Failure
> + */
> +static int ibmvtpm_crq_send_init(struct ibmvtpm_dev *ibmvtpm)
> +{
> + int rc;
> +
> + rc = ibmvtpm_send_crq(ibmvtpm->vdev, INIT_CRQ_CMD, 0);
> + if (rc != H_SUCCESS)
> + dev_err(ibmvtpm->dev,
> + "ibmvtpm_crq_send_init failed rc=%d\n", rc);
> +
> + return rc;
> +}
> +
> +/**
> + * tpm_ibmvtpm_remove - ibm vtpm remove entry point
> + * @vdev: vio device struct
> + *
> + * Return value:
> + * 0
> + */
> +static int __devexit tpm_ibmvtpm_remove(struct vio_dev *vdev)
> +{
> + struct ibmvtpm_dev *ibmvtpm = ibmvtpm_get_data(&vdev->dev);
> + int rc = 0;
> +
> + free_irq(vdev->irq, ibmvtpm);
> + tasklet_kill(&ibmvtpm->tasklet);
> +
> + do {
> + if (rc)
> + msleep(100);
> + rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
> + } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
> +
> + dma_unmap_single(ibmvtpm->dev, ibmvtpm->crq_dma_handle,
> + CRQ_RES_BUF_SIZE, DMA_BIDIRECTIONAL);
> + free_page((unsigned long)ibmvtpm->crq_queue.crq_addr);
> +
> + if (ibmvtpm->rtce_buf) {
> + dma_unmap_single(ibmvtpm->dev, ibmvtpm->rtce_dma_handle,
> + ibmvtpm->rtce_size, DMA_BIDIRECTIONAL);
> + kfree(ibmvtpm->rtce_buf);
> + }
> +
> + tpm_remove_hardware(ibmvtpm->dev);
> +
> + kfree(ibmvtpm);
> +
> + return 0;
> +}
> +
> +/**
> + * tpm_ibmvtpm_get_desired_dma - Get DMA size needed by this driver
> + * @vdev: vio device struct
> + *
> + * Return value:
> + * Number of bytes the driver needs to DMA map
> + */
> +static unsigned long tpm_ibmvtpm_get_desired_dma(struct vio_dev *vdev)
> +{
> + struct ibmvtpm_dev *ibmvtpm = ibmvtpm_get_data(&vdev->dev);
> + return CRQ_RES_BUF_SIZE + ibmvtpm->rtce_size;
> +}
> +
> +/**
> + * tpm_ibmvtpm_suspend - Suspend
> + * @dev: device struct
> + *
> + * Return value:
> + * 0
> + */
> +static int tpm_ibmvtpm_suspend(struct device *dev)
> +{
> + struct ibmvtpm_dev *ibmvtpm = ibmvtpm_get_data(dev);
> + struct ibmvtpm_crq crq;
> + u64 *buf = (u64 *) &crq;
> + int rc = 0;
> +
> + crq.valid = (u8)IBMVTPM_VALID_CMD;
> + crq.msg = (u8)VTPM_PREPARE_TO_SUSPEND;
> +
> + rc = ibmvtpm_send_crq(ibmvtpm->vdev, buf[0], buf[1]);
> + if (rc != H_SUCCESS)
> + dev_err(ibmvtpm->dev,
> + "tpm_ibmvtpm_suspend failed rc=%d\n", rc);
> +
> + return rc;
> +}
> +
> +/**
> + * ibmvtpm_reset_crq - Reset CRQ
> + * @ibmvtpm: ibm vtpm struct
> + *
> + * Return value:
> + * 0 - Success
> + * Non-zero - Failure
> + */
> +static int ibmvtpm_reset_crq(struct ibmvtpm_dev *ibmvtpm)
> +{
> + int rc = 0;
> +
> + do {
> + if (rc)
> + msleep(100);
> + rc = plpar_hcall_norets(H_FREE_CRQ,
> + ibmvtpm->vdev->unit_address);
> + } while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
> +
> + memset(ibmvtpm->crq_queue.crq_addr, 0, CRQ_RES_BUF_SIZE);
> + ibmvtpm->crq_queue.index = 0;
> +
> + return plpar_hcall_norets(H_REG_CRQ, ibmvtpm->vdev->unit_address,
> + ibmvtpm->crq_dma_handle, CRQ_RES_BUF_SIZE);
> +}
> +
> +/**
> + * tpm_ibmvtpm_resume - Resume from suspend
> + * @dev: device struct
> + *
> + * Return value:
> + * 0
> + */
> +static int tpm_ibmvtpm_resume(struct device *dev)
> +{
> + struct ibmvtpm_dev *ibmvtpm = ibmvtpm_get_data(dev);
> + unsigned long flags;
> + int rc = 0;
> +
> + do {
> + if (rc)
> + msleep(100);
> + rc = plpar_hcall_norets(H_ENABLE_CRQ,
> + ibmvtpm->vdev->unit_address);
> + } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
> +
> + if (rc) {
> + dev_err(dev, "Error enabling ibmvtpm rc=%d\n", rc);
> + return rc;
> + }
> +
> + spin_lock_irqsave(&ibmvtpm->lock, flags);
> + vio_disable_interrupts(ibmvtpm->vdev);
> + tasklet_schedule(&ibmvtpm->tasklet);
> + spin_unlock_irqrestore(&ibmvtpm->lock, flags);
> +
> + rc = ibmvtpm_crq_send_init(ibmvtpm);
> + if (rc)
> + dev_err(dev, "Error send_init rc=%d\n", rc);
> +
> + return rc;
> +}
> +
> +static const struct file_operations ibmvtpm_ops = {
> + .owner = THIS_MODULE,
> + .llseek = no_llseek,
> + .open = tpm_open,
> + .read = tpm_read,
> + .write = tpm_write,
> + .release = tpm_release,
> +};
> +
> +static DEVICE_ATTR(pubek, S_IRUGO, tpm_show_pubek, NULL);
> +static DEVICE_ATTR(pcrs, S_IRUGO, tpm_show_pcrs, NULL);
> +static DEVICE_ATTR(enabled, S_IRUGO, tpm_show_enabled, NULL);
> +static DEVICE_ATTR(active, S_IRUGO, tpm_show_active, NULL);
> +static DEVICE_ATTR(owned, S_IRUGO, tpm_show_owned, NULL);
> +static DEVICE_ATTR(temp_deactivated, S_IRUGO, tpm_show_temp_deactivated,
> + NULL);
> +static DEVICE_ATTR(caps, S_IRUGO, tpm_show_caps_1_2, NULL);
> +static DEVICE_ATTR(cancel, S_IWUSR | S_IWGRP, NULL, tpm_store_cancel);
> +static DEVICE_ATTR(durations, S_IRUGO, tpm_show_durations, NULL);
> +static DEVICE_ATTR(timeouts, S_IRUGO, tpm_show_timeouts, NULL);
> +
> +static struct attribute *ibmvtpm_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 struct attribute_group ibmvtpm_attr_grp = { .attrs = ibmvtpm_attrs };
> +
> +static const struct tpm_vendor_specific tpm_ibmvtpm = {
> + .recv = tpm_ibmvtpm_recv,
> + .send = tpm_ibmvtpm_send,
> + .cancel = tpm_ibmvtpm_cancel,
> + .status = tpm_ibmvtpm_status,
> + .req_complete_mask = 0,
> + .req_complete_val = 0,
> + .req_canceled = 0,
> + .attr_group = &ibmvtpm_attr_grp,
> + .miscdev = { .fops = &ibmvtpm_ops, },
> +};
> +
> +static const struct dev_pm_ops tpm_ibmvtpm_pm_ops = {
> + .suspend = tpm_ibmvtpm_suspend,
> + .resume = tpm_ibmvtpm_resume,
> +};
> +
> +/**
> + * ibmvtpm_crq_get_next - Get next responded crq
> + * @ibmvtpm vtpm device struct
> + *
> + * Return value:
> + * vtpm crq pointer
> + */
> +static struct ibmvtpm_crq *ibmvtpm_crq_get_next(struct ibmvtpm_dev *ibmvtpm)
> +{
> + struct ibmvtpm_crq_queue *crq_q = &ibmvtpm->crq_queue;
> + struct ibmvtpm_crq *crq = &crq_q->crq_addr[crq_q->index];
> +
> + if (crq->valid & VTPM_MSG_RES) {
> + if (++crq_q->index == crq_q->num_entry)
> + crq_q->index = 0;
> + rmb();
> + } else
> + crq = NULL;
> + return crq;
> +}
> +
> +/**
> + * ibmvtpm_crq_process - Process responded crq
> + * @crq crq to be processed
> + * @ibmvtpm vtpm device struct
> + *
> + * Return value:
> + * Nothing
> + */
> +static void ibmvtpm_crq_process(struct ibmvtpm_crq *crq,
> + struct ibmvtpm_dev *ibmvtpm)
> +{
> + int rc = 0;
> +
> + switch (crq->valid) {
> + case VALID_INIT_CRQ:
> + switch (crq->msg) {
> + case INIT_CRQ_RES:
> + dev_info(ibmvtpm->dev, "CRQ initialized\n");
> + rc = ibmvtpm_crq_send_init_complete(ibmvtpm);
> + if (rc)
> + dev_err(ibmvtpm->dev, "Unable to send CRQ init complete rc=%d\n", rc);
> + return;
> + case INIT_CRQ_COMP_RES:
> + dev_info(ibmvtpm->dev,
> + "CRQ initialization completed\n");
> + return;
> + default:
> + dev_err(ibmvtpm->dev, "Unknown crq message type: %d\n", crq->msg);
> + return;
> + }
> + return;
> + case IBMVTPM_VALID_CMD:
> + switch (crq->msg) {
> + case VTPM_GET_RTCE_BUFFER_SIZE_RES:
> + if (crq->len <= 0) {
> + dev_err(ibmvtpm->dev, "Invalid rtce size\n");
> + return;
> + }
> + ibmvtpm->rtce_size = crq->len;
> + ibmvtpm->rtce_buf = kmalloc(ibmvtpm->rtce_size,
> + GFP_KERNEL);
> + if (!ibmvtpm->rtce_buf) {
> + dev_err(ibmvtpm->dev, "Failed to allocate memory for rtce buffer\n");
> + return;
> + }
> +
> + ibmvtpm->rtce_dma_handle = dma_map_single(ibmvtpm->dev,
> + ibmvtpm->rtce_buf, ibmvtpm->rtce_size,
> + DMA_BIDIRECTIONAL);
> +
> + if (dma_mapping_error(ibmvtpm->dev,
> + ibmvtpm->rtce_dma_handle)) {
> + kfree(ibmvtpm->rtce_buf);
> + ibmvtpm->rtce_buf = NULL;
> + dev_err(ibmvtpm->dev, "Failed to dma map rtce buffer\n");
> + }
> +
> + return;
> + case VTPM_GET_VERSION_RES:
> + ibmvtpm->vtpm_version = crq->data;
> + return;
> + case VTPM_TPM_COMMAND_RES:
> + ibmvtpm->crq_res.valid = crq->valid;
> + ibmvtpm->crq_res.msg = crq->msg;
> + ibmvtpm->crq_res.len = crq->len;
> + ibmvtpm->crq_res.data = crq->data;
> + wake_up_interruptible(&wq);
> + return;
> + default:
> + return;
> + }
> + }
> + return;
> +}
> +
> +/**
> + * ibmvtpm_interrupt - Interrupt handler
> + * @irq: irq number to handle
> + * @vtpm_instance: vtpm that received interrupt
> + *
> + * Returns:
> + * IRQ_HANDLED
> + **/
> +static irqreturn_t ibmvtpm_interrupt(int irq, void *vtpm_instance)
> +{
> + struct ibmvtpm_dev *ibmvtpm = (struct ibmvtpm_dev *) vtpm_instance;
> + unsigned long flags;
> +
> + spin_lock_irqsave(&ibmvtpm->lock, flags);
> + vio_disable_interrupts(ibmvtpm->vdev);
> + tasklet_schedule(&ibmvtpm->tasklet);
> + spin_unlock_irqrestore(&ibmvtpm->lock, flags);
> +
> + return IRQ_HANDLED;
> +}
> +
> +/**
> + * ibmvtpm_tasklet - Interrupt handler tasklet
> + * @data: ibm vtpm device struct
> + *
> + * Returns:
> + * Nothing
> + **/
> +static void ibmvtpm_tasklet(void *data)
> +{
> + struct ibmvtpm_dev *ibmvtpm = data;
> + struct ibmvtpm_crq *crq;
> + unsigned long flags;
> +
> + spin_lock_irqsave(&ibmvtpm->lock, flags);
> + while ((crq = ibmvtpm_crq_get_next(ibmvtpm)) != NULL) {
> + ibmvtpm_crq_process(crq, ibmvtpm);
> + crq->valid = 0;
> + wmb();
> + }
> +
> + vio_enable_interrupts(ibmvtpm->vdev);
> + spin_unlock_irqrestore(&ibmvtpm->lock, flags);
> +}
> +
> +/**
> + * tpm_ibmvtpm_probe - ibm vtpm initialize entry point
> + * @vio_dev: vio device struct
> + * @id: vio device id struct
> + *
> + * Return value:
> + * 0 - Success
> + * Non-zero - Failure
> + */
> +static int __devinit tpm_ibmvtpm_probe(struct vio_dev *vio_dev,
> + const struct vio_device_id *id)
> +{
> + struct ibmvtpm_dev *ibmvtpm;
> + struct device *dev = &vio_dev->dev;
> + struct ibmvtpm_crq_queue *crq_q;
> + struct tpm_chip *chip;
> + int rc = -ENOMEM, rc1;
> +
> + chip = tpm_register_hardware(dev, &tpm_ibmvtpm);
> + if (!chip) {
> + dev_err(dev, "tpm_register_hardware failed\n");
> + return -ENODEV;
> + }
> +
> + ibmvtpm = kzalloc(sizeof(struct ibmvtpm_dev), GFP_KERNEL);
> + if (!ibmvtpm) {
> + dev_err(dev, "kzalloc for ibmvtpm failed\n");
> + goto cleanup;
> + }
> +
> + crq_q = &ibmvtpm->crq_queue;
> + crq_q->crq_addr = (struct ibmvtpm_crq *)get_zeroed_page(GFP_KERNEL);
> + if (!crq_q->crq_addr) {
> + dev_err(dev, "Unable to allocate memory for crq_addr\n");
> + goto cleanup;
> + }
> +
> + crq_q->num_entry = CRQ_RES_BUF_SIZE / sizeof(*crq_q->crq_addr);
> + ibmvtpm->crq_dma_handle = dma_map_single(dev, crq_q->crq_addr,
> + CRQ_RES_BUF_SIZE,
> + DMA_BIDIRECTIONAL);
> +
> + if (dma_mapping_error(dev, ibmvtpm->crq_dma_handle)) {
> + dev_err(dev, "dma mapping failed\n");
> + goto cleanup;
> + }
> +
> + rc = plpar_hcall_norets(H_REG_CRQ, vio_dev->unit_address,
> + ibmvtpm->crq_dma_handle, CRQ_RES_BUF_SIZE);
> + if (rc == H_RESOURCE)
> + rc = ibmvtpm_reset_crq(ibmvtpm);
> +
> + if (rc) {
> + dev_err(dev, "Unable to register CRQ rc=%d\n", rc);
> + goto reg_crq_cleanup;
> + }
> +
> + tasklet_init(&ibmvtpm->tasklet, (void *)ibmvtpm_tasklet,
> + (unsigned long)ibmvtpm);
> +
> + rc = request_irq(vio_dev->irq, ibmvtpm_interrupt, 0,
> + tpm_ibmvtpm_driver_name, ibmvtpm);
> + if (rc) {
> + dev_err(dev, "Error %d register irq 0x%x\n", rc, vio_dev->irq);
> + goto init_irq_cleanup;
> + }
> +
> + rc = vio_enable_interrupts(vio_dev);
> + if (rc) {
> + dev_err(dev, "Error %d enabling interrupts\n", rc);
> + goto init_irq_cleanup;
> + }
> +
> + crq_q->index = 0;
> +
> + ibmvtpm->dev = dev;
> + ibmvtpm->vdev = vio_dev;
> + chip->vendor.data = (void *)ibmvtpm;
> +
> + spin_lock_init(&ibmvtpm->lock);
> + spin_lock_init(&ibmvtpm->rtce_lock);
> +
> + rc = ibmvtpm_crq_send_init(ibmvtpm);
> + if (rc)
> + goto init_irq_cleanup;
> +
> + rc = ibmvtpm_crq_get_version(ibmvtpm);
> + if (rc)
> + goto init_irq_cleanup;
> +
> + rc = ibmvtpm_crq_get_rtce_size(ibmvtpm);
> + if (rc)
> + goto init_irq_cleanup;
> +
> + return rc;
> +init_irq_cleanup:
> + tasklet_kill(&ibmvtpm->tasklet);
> + do {
> + rc1 = plpar_hcall_norets(H_FREE_CRQ, vio_dev->unit_address);
> + } while (rc1 == H_BUSY || H_IS_LONG_BUSY(rc1));
> +reg_crq_cleanup:
> + dma_unmap_single(dev, ibmvtpm->crq_dma_handle, CRQ_RES_BUF_SIZE,
> + DMA_BIDIRECTIONAL);
> +cleanup:
> + if (ibmvtpm) {
> + if (crq_q->crq_addr)
> + free_page((unsigned long)crq_q->crq_addr);
> + kfree(ibmvtpm);
> + }
> +
> + tpm_remove_hardware(dev);
> +
> + return rc;
> +}
> +
> +static struct vio_driver ibmvtpm_driver = {
> + .id_table = tpm_ibmvtpm_device_table,
> + .probe = tpm_ibmvtpm_probe,
> + .remove = tpm_ibmvtpm_remove,
> + .get_desired_dma = tpm_ibmvtpm_get_desired_dma,
> + .name = tpm_ibmvtpm_driver_name,
> + .pm = &tpm_ibmvtpm_pm_ops,
> +};
> +
> +/**
> + * ibmvtpm_module_init - Initialize ibm vtpm module
> + *
> + * Return value:
> + * 0 -Success
> + * Non-zero - Failure
> + */
> +static int __init ibmvtpm_module_init(void)
> +{
> + return vio_register_driver(&ibmvtpm_driver);
> +}
> +
> +/**
> + * ibmvtpm_module_exit - Teardown ibm vtpm module
> + *
> + * Return value:
> + * Nothing
> + */
> +static void __exit ibmvtpm_module_exit(void)
> +{
> + vio_unregister_driver(&ibmvtpm_driver);
> +}
> +
> +module_init(ibmvtpm_module_init);
> +module_exit(ibmvtpm_module_exit);
> +
> +MODULE_AUTHOR("adlai@xxxxxxxxxx");
> +MODULE_DESCRIPTION("IBM vTPM Driver");
> +MODULE_VERSION("1.0");
> +MODULE_LICENSE("GPL");
> diff --git a/drivers/char/tpm/tpm_ibmvtpm.h b/drivers/char/tpm/tpm_ibmvtpm.h
> new file mode 100644
> index 0000000..4296eb4
> --- /dev/null
> +++ b/drivers/char/tpm/tpm_ibmvtpm.h
> @@ -0,0 +1,77 @@
> +/*
> + * Copyright (C) 2012 IBM Corporation
> + *
> + * Author: Ashley Lai <adlai@xxxxxxxxxx>
> + *
> + * Maintained by: <tpmdd-devel@xxxxxxxxxxxxxxxxxxxxx>
> + *
> + * Device driver for TCG/TCPA TPM (trusted platform module).
> + * Specifications at www.trustedcomputinggroup.org
> + *
> + * 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.
> + *
> + */
> +
> +#ifndef __TPM_IBMVTPM_H__
> +#define __TPM_IBMVTPM_H__
> +
> +/* vTPM Message Format 1 */
> +struct ibmvtpm_crq {
> + u8 valid;
> + u8 msg;
> + u16 len;
> + u32 data;
> + u64 reserved;
> +} __attribute__((packed, aligned(8)));
> +
> +struct ibmvtpm_crq_queue {
> + struct ibmvtpm_crq *crq_addr;
> + u32 index;
> + u32 num_entry;
> +};
> +
> +struct ibmvtpm_dev {
> + struct device *dev;
> + struct vio_dev *vdev;
> + struct ibmvtpm_crq_queue crq_queue;
> + dma_addr_t crq_dma_handle;
> + spinlock_t lock;
> + struct tasklet_struct tasklet;
> + u32 rtce_size;
> + void __iomem *rtce_buf;
> + dma_addr_t rtce_dma_handle;
> + spinlock_t rtce_lock;
> + struct ibmvtpm_crq crq_res;
> + u32 vtpm_version;
> +};
> +
> +#define CRQ_RES_BUF_SIZE PAGE_SIZE
> +
> +/* Initialize CRQ */
> +#define INIT_CRQ_CMD 0xC001000000000000LL /* Init cmd */
> +#define INIT_CRQ_COMP_CMD 0xC002000000000000LL /* Init complete cmd */
> +#define INIT_CRQ_RES 0x01 /* Init respond */
> +#define INIT_CRQ_COMP_RES 0x02 /* Init complete respond */
> +#define VALID_INIT_CRQ 0xC0 /* Valid command for init crq */
> +
> +/* vTPM CRQ response is the message type | 0x80 */
> +#define VTPM_MSG_RES 0x80
> +#define IBMVTPM_VALID_CMD 0x80
> +
> +/* vTPM CRQ message types */
> +#define VTPM_GET_VERSION 0x01
> +#define VTPM_GET_VERSION_RES (0x01 | VTPM_MSG_RES)
> +
> +#define VTPM_TPM_COMMAND 0x02
> +#define VTPM_TPM_COMMAND_RES (0x02 | VTPM_MSG_RES)
> +
> +#define VTPM_GET_RTCE_BUFFER_SIZE 0x03
> +#define VTPM_GET_RTCE_BUFFER_SIZE_RES (0x03 | VTPM_MSG_RES)
> +
> +#define VTPM_PREPARE_TO_SUSPEND 0x04
> +#define VTPM_PREPARE_TO_SUSPEND_RES (0x04 | VTPM_MSG_RES)
> +
> +#endif
> diff --git a/drivers/char/tpm/tpm_of.c b/drivers/char/tpm/tpm_of.c
> new file mode 100644
> index 0000000..98ba2bd
> --- /dev/null
> +++ b/drivers/char/tpm/tpm_of.c
> @@ -0,0 +1,73 @@
> +/*
> + * Copyright 2012 IBM Corporation
> + *
> + * Author: Ashley Lai <adlai@xxxxxxxxxx>
> + *
> + * Maintained by: <tpmdd-devel@xxxxxxxxxxxxxxxxxxxxx>
> + *
> + * Read the event log created by the firmware on PPC64
> + *
> + * 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; either version
> + * 2 of the License, or (at your option) any later version.
> + *
> + */
> +
> +#include <linux/slab.h>
> +#include <linux/of.h>
> +
> +#include "tpm.h"
> +#include "tpm_eventlog.h"
> +
> +int read_log(struct tpm_bios_log *log)
> +{
> + struct device_node *np;
> + const u32 *sizep;
> + const __be64 *basep;
> +
> + if (log->bios_event_log != NULL) {
> + pr_err("%s: ERROR - Eventlog already initialized\n", __func__);
> + return -EFAULT;
> + }
> +
> + np = of_find_node_by_name(NULL, "ibm,vtpm");
> + if (!np) {
> + pr_err("%s: ERROR - IBMVTPM not supported\n", __func__);
> + return -ENODEV;
> + }
> +
> + sizep = of_get_property(np, "linux,sml-size", NULL);
> + if (sizep == NULL) {
> + pr_err("%s: ERROR - SML size not found\n", __func__);
> + goto cleanup_eio;
> + }
> + if (*sizep == 0) {
> + pr_err("%s: ERROR - event log area empty\n", __func__);
> + goto cleanup_eio;
> + }
> +
> + basep = of_get_property(np, "linux,sml-base", NULL);
> + if (basep == NULL) {
> + pr_err(KERN_ERR "%s: ERROR - SML not found\n", __func__);
> + goto cleanup_eio;
> + }
> +
> + of_node_put(np);
> + log->bios_event_log = kmalloc(*sizep, GFP_KERNEL);
> + if (!log->bios_event_log) {
> + pr_err("%s: ERROR - Not enough memory for BIOS measurements\n",
> + __func__);
> + return -ENOMEM;
> + }
> +
> + log->bios_event_log_end = log->bios_event_log + *sizep;
> +
> + memcpy(log->bios_event_log, __va(be64_to_cpup(basep)), *sizep);
> +
> + return 0;
> +
> +cleanup_eio:
> + of_node_put(np);
> + return -EIO;
> +}
> diff --git a/drivers/char/tpm/tpm_ppi.c b/drivers/char/tpm/tpm_ppi.c
> new file mode 100644
> index 0000000..440fa1c
> --- /dev/null
> +++ b/drivers/char/tpm/tpm_ppi.c
> @@ -0,0 +1,460 @@
> +#include <linux/acpi.h>
> +#include <acpi/acpi_drivers.h>
> +#include "tpm.h"
> +
> +static const u8 tpm_ppi_uuid[] = {
> + 0xA6, 0xFA, 0xDD, 0x3D,
> + 0x1B, 0x36,
> + 0xB4, 0x4E,
> + 0xA4, 0x24,
> + 0x8D, 0x10, 0x08, 0x9D, 0x16, 0x53
> +};
> +static char *tpm_device_name = "TPM";
> +
> +#define TPM_PPI_REVISION_ID 1
> +#define TPM_PPI_FN_VERSION 1
> +#define TPM_PPI_FN_SUBREQ 2
> +#define TPM_PPI_FN_GETREQ 3
> +#define TPM_PPI_FN_GETACT 4
> +#define TPM_PPI_FN_GETRSP 5
> +#define TPM_PPI_FN_SUBREQ2 7
> +#define TPM_PPI_FN_GETOPR 8
> +#define PPI_TPM_REQ_MAX 22
> +#define PPI_VS_REQ_START 128
> +#define PPI_VS_REQ_END 255
> +#define PPI_VERSION_LEN 3
> +
> +static acpi_status ppi_callback(acpi_handle handle, u32 level, void *context,
> + void **return_value)
> +{
> + acpi_status status;
> + struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
> + status = acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer);
> + if (strstr(buffer.pointer, context) != NULL) {
> + *return_value = handle;
> + kfree(buffer.pointer);
> + return AE_CTRL_TERMINATE;
> + }
> + return AE_OK;
> +}
> +
> +static inline void ppi_assign_params(union acpi_object params[4],
> + u64 function_num)
> +{
> + params[0].type = ACPI_TYPE_BUFFER;
> + params[0].buffer.length = sizeof(tpm_ppi_uuid);
> + params[0].buffer.pointer = (char *)tpm_ppi_uuid;
> + params[1].type = ACPI_TYPE_INTEGER;
> + params[1].integer.value = TPM_PPI_REVISION_ID;
> + params[2].type = ACPI_TYPE_INTEGER;
> + params[2].integer.value = function_num;
> + params[3].type = ACPI_TYPE_PACKAGE;
> + params[3].package.count = 0;
> + params[3].package.elements = NULL;
> +}
> +
> +ssize_t tpm_show_ppi_version(struct device *dev, struct device_attribute *attr,
> + char *buf)
> +{
> + acpi_handle handle;
> + acpi_status status;
> + struct acpi_object_list input;
> + struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
> + union acpi_object params[4];
> + union acpi_object *obj;
> +
> + input.count = 4;
> + ppi_assign_params(params, TPM_PPI_FN_VERSION);
> + input.pointer = params;
> + status = acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
> + ACPI_UINT32_MAX, ppi_callback, NULL,
> + tpm_device_name, &handle);
> + if (ACPI_FAILURE(status))
> + return -ENXIO;
> +
> + status = acpi_evaluate_object_typed(handle, "_DSM", &input, &output,
> + ACPI_TYPE_STRING);
> + if (ACPI_FAILURE(status))
> + return -ENOMEM;
> + obj = (union acpi_object *)output.pointer;
> + status = scnprintf(buf, PAGE_SIZE, "%s\n", obj->string.pointer);
> + kfree(output.pointer);
> + return status;
> +}
> +
> +ssize_t tpm_show_ppi_request(struct device *dev,
> + struct device_attribute *attr,
> + char *buf)
> +{
> + acpi_handle handle;
> + acpi_status status;
> + struct acpi_object_list input;
> + struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
> + union acpi_object params[4];
> + union acpi_object *ret_obj;
> +
> + input.count = 4;
> + ppi_assign_params(params, TPM_PPI_FN_GETREQ);
> + input.pointer = params;
> + status = acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
> + ACPI_UINT32_MAX, ppi_callback, NULL,
> + tpm_device_name, &handle);
> + if (ACPI_FAILURE(status))
> + return -ENXIO;
> +
> + status = acpi_evaluate_object_typed(handle, "_DSM", &input, &output,
> + ACPI_TYPE_PACKAGE);
> + if (ACPI_FAILURE(status))
> + return -ENOMEM;
> + /*
> + * output.pointer should be of package type, including two integers.
> + * The first is function return code, 0 means success and 1 means
> + * error. The second is pending TPM operation requested by the OS, 0
> + * means none and >0 means operation value.
> + */
> + ret_obj = ((union acpi_object *)output.pointer)->package.elements;
> + if (ret_obj->type == ACPI_TYPE_INTEGER) {
> + if (ret_obj->integer.value) {
> + status = -EFAULT;
> + goto cleanup;
> + }
> + ret_obj++;
> + if (ret_obj->type == ACPI_TYPE_INTEGER)
> + status = scnprintf(buf, PAGE_SIZE, "%llu\n",
> + ret_obj->integer.value);
> + else
> + status = -EINVAL;
> + } else {
> + status = -EINVAL;
> + }
> +cleanup:
> + kfree(output.pointer);
> + return status;
> +}
> +
> +ssize_t tpm_store_ppi_request(struct device *dev,
> + struct device_attribute *attr,
> + const char *buf, size_t count)
> +{
> + char version[PPI_VERSION_LEN + 1];
> + acpi_handle handle;
> + acpi_status status;
> + struct acpi_object_list input;
> + struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
> + union acpi_object params[4];
> + union acpi_object obj;
> + u32 req;
> + u64 ret;
> +
> + input.count = 4;
> + ppi_assign_params(params, TPM_PPI_FN_VERSION);
> + input.pointer = params;
> + status = acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
> + ACPI_UINT32_MAX, ppi_callback, NULL,
> + tpm_device_name, &handle);
> + if (ACPI_FAILURE(status))
> + return -ENXIO;
> +
> + status = acpi_evaluate_object_typed(handle, "_DSM", &input, &output,
> + ACPI_TYPE_STRING);
> + if (ACPI_FAILURE(status))
> + return -ENOMEM;
> + strncpy(version,
> + ((union acpi_object *)output.pointer)->string.pointer,
> + PPI_VERSION_LEN);
> + kfree(output.pointer);
> + output.length = ACPI_ALLOCATE_BUFFER;
> + output.pointer = NULL;
> + /*
> + * the function to submit TPM operation request to pre-os environment
> + * is updated with function index from SUBREQ to SUBREQ2 since PPI
> + * version 1.1
> + */
> + if (strcmp(version, "1.1") == -1)
> + params[2].integer.value = TPM_PPI_FN_SUBREQ;
> + else
> + params[2].integer.value = TPM_PPI_FN_SUBREQ2;
> + /*
> + * PPI spec defines params[3].type as ACPI_TYPE_PACKAGE. Some BIOS
> + * accept buffer/string/integer type, but some BIOS accept buffer/
> + * string/package type. For PPI version 1.0 and 1.1, use buffer type
> + * for compatibility, and use package type since 1.2 according to spec.
> + */
> + if (strcmp(version, "1.2") == -1) {
> + params[3].type = ACPI_TYPE_BUFFER;
> + params[3].buffer.length = sizeof(req);
> + sscanf(buf, "%d", &req);
> + params[3].buffer.pointer = (char *)&req;
> + } else {
> + params[3].package.count = 1;
> + obj.type = ACPI_TYPE_INTEGER;
> + sscanf(buf, "%llu", &obj.integer.value);
> + params[3].package.elements = &obj;
> + }
> +
> + status = acpi_evaluate_object_typed(handle, "_DSM", &input, &output,
> + ACPI_TYPE_INTEGER);
> + if (ACPI_FAILURE(status))
> + return -ENOMEM;
> + ret = ((union acpi_object *)output.pointer)->integer.value;
> + if (ret == 0)
> + status = (acpi_status)count;
> + else if (ret == 1)
> + status = -EPERM;
> + else
> + status = -EFAULT;
> + kfree(output.pointer);
> + return status;
> +}
> +
> +ssize_t tpm_show_ppi_transition_action(struct device *dev,
> + struct device_attribute *attr,
> + char *buf)
> +{
> + char version[PPI_VERSION_LEN + 1];
> + acpi_handle handle;
> + acpi_status status;
> + struct acpi_object_list input;
> + struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
> + union acpi_object params[4];
> + u32 ret;
> + char *info[] = {
> + "None",
> + "Shutdown",
> + "Reboot",
> + "OS Vendor-specific",
> + "Error",
> + };
> + input.count = 4;
> + ppi_assign_params(params, TPM_PPI_FN_VERSION);
> + input.pointer = params;
> + status = acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
> + ACPI_UINT32_MAX, ppi_callback, NULL,
> + tpm_device_name, &handle);
> + if (ACPI_FAILURE(status))
> + return -ENXIO;
> +
> + status = acpi_evaluate_object_typed(handle, "_DSM", &input, &output,
> + ACPI_TYPE_STRING);
> + if (ACPI_FAILURE(status))
> + return -ENOMEM;
> + strncpy(version,
> + ((union acpi_object *)output.pointer)->string.pointer,
> + PPI_VERSION_LEN);
> + /*
> + * PPI spec defines params[3].type as empty package, but some platforms
> + * (e.g. Capella with PPI 1.0) need integer/string/buffer type, so for
> + * compatibility, define params[3].type as buffer, if PPI version < 1.2
> + */
> + if (strcmp(version, "1.2") == -1) {
> + params[3].type = ACPI_TYPE_BUFFER;
> + params[3].buffer.length = 0;
> + params[3].buffer.pointer = NULL;
> + }
> + params[2].integer.value = TPM_PPI_FN_GETACT;
> + kfree(output.pointer);
> + output.length = ACPI_ALLOCATE_BUFFER;
> + output.pointer = NULL;
> + status = acpi_evaluate_object_typed(handle, "_DSM", &input, &output,
> + ACPI_TYPE_INTEGER);
> + if (ACPI_FAILURE(status))
> + return -ENOMEM;
> + ret = ((union acpi_object *)output.pointer)->integer.value;
> + if (ret < ARRAY_SIZE(info) - 1)
> + status = scnprintf(buf, PAGE_SIZE, "%d: %s\n", ret, info[ret]);
> + else
> + status = scnprintf(buf, PAGE_SIZE, "%d: %s\n", ret,
> + info[ARRAY_SIZE(info)-1]);
> + kfree(output.pointer);
> + return status;
> +}
> +
> +ssize_t tpm_show_ppi_response(struct device *dev,
> + struct device_attribute *attr,
> + char *buf)
> +{
> + acpi_handle handle;
> + acpi_status status;
> + struct acpi_object_list input;
> + struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
> + union acpi_object params[4];
> + union acpi_object *ret_obj;
> + u64 req;
> +
> + input.count = 4;
> + ppi_assign_params(params, TPM_PPI_FN_GETRSP);
> + input.pointer = params;
> + status = acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
> + ACPI_UINT32_MAX, ppi_callback, NULL,
> + tpm_device_name, &handle);
> + if (ACPI_FAILURE(status))
> + return -ENXIO;
> +
> + status = acpi_evaluate_object_typed(handle, "_DSM", &input, &output,
> + ACPI_TYPE_PACKAGE);
> + if (ACPI_FAILURE(status))
> + return -ENOMEM;
> + /*
> + * parameter output.pointer should be of package type, including
> + * 3 integers. The first means function return code, the second means
> + * most recent TPM operation request, and the last means response to
> + * the most recent TPM operation request. Only if the first is 0, and
> + * the second integer is not 0, the response makes sense.
> + */
> + ret_obj = ((union acpi_object *)output.pointer)->package.elements;
> + if (ret_obj->type != ACPI_TYPE_INTEGER) {
> + status = -EINVAL;
> + goto cleanup;
> + }
> + if (ret_obj->integer.value) {
> + status = -EFAULT;
> + goto cleanup;
> + }
> + ret_obj++;
> + if (ret_obj->type != ACPI_TYPE_INTEGER) {
> + status = -EINVAL;
> + goto cleanup;
> + }
> + if (ret_obj->integer.value) {
> + req = ret_obj->integer.value;
> + ret_obj++;
> + if (ret_obj->type != ACPI_TYPE_INTEGER) {
> + status = -EINVAL;
> + goto cleanup;
> + }
> + if (ret_obj->integer.value == 0)
> + status = scnprintf(buf, PAGE_SIZE, "%llu %s\n", req,
> + "0: Success");
> + else if (ret_obj->integer.value == 0xFFFFFFF0)
> + status = scnprintf(buf, PAGE_SIZE, "%llu %s\n", req,
> + "0xFFFFFFF0: User Abort");
> + else if (ret_obj->integer.value == 0xFFFFFFF1)
> + status = scnprintf(buf, PAGE_SIZE, "%llu %s\n", req,
> + "0xFFFFFFF1: BIOS Failure");
> + else if (ret_obj->integer.value >= 1 &&
> + ret_obj->integer.value <= 0x00000FFF)
> + status = scnprintf(buf, PAGE_SIZE, "%llu %llu: %s\n",
> + req, ret_obj->integer.value,
> + "Corresponding TPM error");
> + else
> + status = scnprintf(buf, PAGE_SIZE, "%llu %llu: %s\n",
> + req, ret_obj->integer.value,
> + "Error");
> + } else {
> + status = scnprintf(buf, PAGE_SIZE, "%llu: %s\n",
> + ret_obj->integer.value, "No Recent Request");
> + }
> +cleanup:
> + kfree(output.pointer);
> + return status;
> +}
> +
> +static ssize_t show_ppi_operations(char *buf, u32 start, u32 end)
> +{
> + char *str = buf;
> + char version[PPI_VERSION_LEN];
> + acpi_handle handle;
> + acpi_status status;
> + struct acpi_object_list input;
> + struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
> + union acpi_object params[4];
> + union acpi_object obj;
> + int i;
> + u32 ret;
> + char *info[] = {
> + "Not implemented",
> + "BIOS only",
> + "Blocked for OS by BIOS",
> + "User required",
> + "User not required",
> + };
> + input.count = 4;
> + ppi_assign_params(params, TPM_PPI_FN_VERSION);
> + input.pointer = params;
> + status = acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
> + ACPI_UINT32_MAX, ppi_callback, NULL,
> + tpm_device_name, &handle);
> + if (ACPI_FAILURE(status))
> + return -ENXIO;
> +
> + status = acpi_evaluate_object_typed(handle, "_DSM", &input, &output,
> + ACPI_TYPE_STRING);
> + if (ACPI_FAILURE(status))
> + return -ENOMEM;
> +
> + strncpy(version,
> + ((union acpi_object *)output.pointer)->string.pointer,
> + PPI_VERSION_LEN);
> + kfree(output.pointer);
> + output.length = ACPI_ALLOCATE_BUFFER;
> + output.pointer = NULL;
> + if (strcmp(version, "1.2") == -1)
> + return -EPERM;
> +
> + params[2].integer.value = TPM_PPI_FN_GETOPR;
> + params[3].package.count = 1;
> + obj.type = ACPI_TYPE_INTEGER;
> + params[3].package.elements = &obj;
> + for (i = start; i <= end; i++) {
> + obj.integer.value = i;
> + status = acpi_evaluate_object_typed(handle, "_DSM",
> + &input, &output, ACPI_TYPE_INTEGER);
> + if (ACPI_FAILURE(status))
> + return -ENOMEM;
> +
> + ret = ((union acpi_object *)output.pointer)->integer.value;
> + if (ret > 0 && ret < ARRAY_SIZE(info))
> + str += scnprintf(str, PAGE_SIZE, "%d %d: %s\n",
> + i, ret, info[ret]);
> + kfree(output.pointer);
> + output.length = ACPI_ALLOCATE_BUFFER;
> + output.pointer = NULL;
> + }
> + return str - buf;
> +}
> +
> +ssize_t tpm_show_ppi_tcg_operations(struct device *dev,
> + struct device_attribute *attr, char *buf)
> +{
> + return show_ppi_operations(buf, 0, PPI_TPM_REQ_MAX);
> +}
> +
> +ssize_t tpm_show_ppi_vs_operations(struct device *dev,
> + struct device_attribute *attr, char *buf)
> +{
> + return show_ppi_operations(buf, PPI_VS_REQ_START, PPI_VS_REQ_END);
> +}
> +
> +static DEVICE_ATTR(version, S_IRUGO, tpm_show_ppi_version, NULL);
> +static DEVICE_ATTR(request, S_IRUGO | S_IWUSR | S_IWGRP,
> + tpm_show_ppi_request, tpm_store_ppi_request);
> +static DEVICE_ATTR(transition_action, S_IRUGO,
> + tpm_show_ppi_transition_action, NULL);
> +static DEVICE_ATTR(response, S_IRUGO, tpm_show_ppi_response, NULL);
> +static DEVICE_ATTR(tcg_operations, S_IRUGO, tpm_show_ppi_tcg_operations, NULL);
> +static DEVICE_ATTR(vs_operations, S_IRUGO, tpm_show_ppi_vs_operations, NULL);
> +
> +static struct attribute *ppi_attrs[] = {
> + &dev_attr_version.attr,
> + &dev_attr_request.attr,
> + &dev_attr_transition_action.attr,
> + &dev_attr_response.attr,
> + &dev_attr_tcg_operations.attr,
> + &dev_attr_vs_operations.attr, NULL,
> +};
> +static struct attribute_group ppi_attr_grp = {
> + .attrs = ppi_attrs
> +};
> +
> +ssize_t sys_add_ppi(struct kobject *parent)
> +{
> + struct kobject *ppi;
> + ppi = kobject_create_and_add("ppi", parent);
> + if (sysfs_create_group(ppi, &ppi_attr_grp))
> + return -EFAULT;
> + else
> + return 0;
> +}
> +EXPORT_SYMBOL_GPL(sys_add_ppi);
> +
> +MODULE_LICENSE("GPL");
> diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c
> index c4be351..6bdf267 100644
> --- a/drivers/char/tpm/tpm_tis.c
> +++ b/drivers/char/tpm/tpm_tis.c
> @@ -705,6 +705,7 @@ out_err:
> return rc;
> }
>
> +#if defined(CONFIG_PNP) || defined(CONFIG_PM_SLEEP)
> static void tpm_tis_reenable_interrupts(struct tpm_chip *chip)
> {
> u32 intmask;
> @@ -725,7 +726,7 @@ static void tpm_tis_reenable_interrupts(struct tpm_chip *chip)
> iowrite32(intmask,
> chip->vendor.iobase + TPM_INT_ENABLE(chip->vendor.locality));
> }
> -
> +#endif
>
> #ifdef CONFIG_PNP
> static int __devinit tpm_tis_pnp_init(struct pnp_dev *pnp_dev,
> diff --git a/include/linux/tpm.h b/include/linux/tpm.h
> index fdc718a..fcb627f 100644
> --- a/include/linux/tpm.h
> +++ b/include/linux/tpm.h
> @@ -32,6 +32,7 @@
> extern int tpm_pcr_read(u32 chip_num, int pcr_idx, u8 *res_buf);
> extern int tpm_pcr_extend(u32 chip_num, int pcr_idx, const u8 *hash);
> extern int tpm_send(u32 chip_num, void *cmd, size_t buflen);
> +extern int tpm_get_random(u32 chip_num, u8 *data, size_t max);
> #else
> static inline int tpm_pcr_read(u32 chip_num, int pcr_idx, u8 *res_buf) {
> return -ENODEV;
> @@ -42,5 +43,8 @@ static inline int tpm_pcr_extend(u32 chip_num, int pcr_idx, const u8 *hash) {
> static inline int tpm_send(u32 chip_num, void *cmd, size_t buflen) {
> return -ENODEV;
> }
> +static inline int tpm_get_random(u32 chip_num, u8 *data, size_t max) {
> + return -ENODEV;
> +}
> #endif
> #endif
> diff --git a/security/integrity/ima/Kconfig b/security/integrity/ima/Kconfig
> index b9c1219..809ccf1 100644
> --- a/security/integrity/ima/Kconfig
> +++ b/security/integrity/ima/Kconfig
> @@ -11,6 +11,7 @@ config IMA
> select CRYPTO_SHA1
> select TCG_TPM if HAS_IOMEM && !UML
> select TCG_TIS if TCG_TPM && X86
> + select TCG_IBMVTPM if TCG_TPM && PPC64
> help
> The Trusted Computing Group(TCG) runtime Integrity
> Measurement Architecture(IMA) maintains a list of hash
> diff --git a/security/keys/trusted.c b/security/keys/trusted.c
> index 2d5d041..3f163d0 100644
> --- a/security/keys/trusted.c
> +++ b/security/keys/trusted.c
> @@ -369,38 +369,6 @@ static int trusted_tpm_send(const u32 chip_num, unsigned char *cmd,
> }
>
> /*
> - * get a random value from TPM
> - */
> -static int tpm_get_random(struct tpm_buf *tb, unsigned char *buf, uint32_t len)
> -{
> - int ret;
> -
> - INIT_BUF(tb);
> - store16(tb, TPM_TAG_RQU_COMMAND);
> - store32(tb, TPM_GETRANDOM_SIZE);
> - store32(tb, TPM_ORD_GETRANDOM);
> - store32(tb, len);
> - ret = trusted_tpm_send(TPM_ANY_NUM, tb->data, sizeof tb->data);
> - if (!ret)
> - memcpy(buf, tb->data + TPM_GETRANDOM_SIZE, len);
> - return ret;
> -}
> -
> -static int my_get_random(unsigned char *buf, int len)
> -{
> - struct tpm_buf *tb;
> - int ret;
> -
> - tb = kmalloc(sizeof *tb, GFP_KERNEL);
> - if (!tb)
> - return -ENOMEM;
> - ret = tpm_get_random(tb, buf, len);
> -
> - kfree(tb);
> - return ret;
> -}
> -
> -/*
> * Lock a trusted key, by extending a selected PCR.
> *
> * Prevents a trusted key that is sealed to PCRs from being accessed.
> @@ -413,8 +381,8 @@ static int pcrlock(const int pcrnum)
>
> if (!capable(CAP_SYS_ADMIN))
> return -EPERM;
> - ret = my_get_random(hash, SHA1_DIGEST_SIZE);
> - if (ret < 0)
> + ret = tpm_get_random(TPM_ANY_NUM, hash, SHA1_DIGEST_SIZE);
> + if (ret != SHA1_DIGEST_SIZE)
> return ret;
> return tpm_pcr_extend(TPM_ANY_NUM, pcrnum, hash) ? -EINVAL : 0;
> }
> @@ -429,8 +397,8 @@ static int osap(struct tpm_buf *tb, struct osapsess *s,
> unsigned char ononce[TPM_NONCE_SIZE];
> int ret;
>
> - ret = tpm_get_random(tb, ononce, TPM_NONCE_SIZE);
> - if (ret < 0)
> + ret = tpm_get_random(TPM_ANY_NUM, ononce, TPM_NONCE_SIZE);
> + if (ret != TPM_NONCE_SIZE)
> return ret;
>
> INIT_BUF(tb);
> @@ -524,8 +492,8 @@ static int tpm_seal(struct tpm_buf *tb, uint16_t keytype,
> if (ret < 0)
> goto out;
>
> - ret = tpm_get_random(tb, td->nonceodd, TPM_NONCE_SIZE);
> - if (ret < 0)
> + ret = tpm_get_random(TPM_ANY_NUM, td->nonceodd, TPM_NONCE_SIZE);
> + if (ret != TPM_NONCE_SIZE)
> goto out;
> ordinal = htonl(TPM_ORD_SEAL);
> datsize = htonl(datalen);
> @@ -634,8 +602,8 @@ static int tpm_unseal(struct tpm_buf *tb,
>
> ordinal = htonl(TPM_ORD_UNSEAL);
> keyhndl = htonl(SRKHANDLE);
> - ret = tpm_get_random(tb, nonceodd, TPM_NONCE_SIZE);
> - if (ret < 0) {
> + ret = tpm_get_random(TPM_ANY_NUM, nonceodd, TPM_NONCE_SIZE);
> + if (ret != TPM_NONCE_SIZE) {
> pr_info("trusted_key: tpm_get_random failed (%d)\n", ret);
> return ret;
> }
> @@ -935,6 +903,7 @@ static int trusted_instantiate(struct key *key, const void *data,
> char *datablob;
> int ret = 0;
> int key_cmd;
> + size_t key_len;
>
> if (datalen <= 0 || datalen > 32767 || !data)
> return -EINVAL;
> @@ -974,8 +943,9 @@ static int trusted_instantiate(struct key *key, const void *data,
> pr_info("trusted_key: key_unseal failed (%d)\n", ret);
> break;
> case Opt_new:
> - ret = my_get_random(payload->key, payload->key_len);
> - if (ret < 0) {
> + key_len = payload->key_len;
> + ret = tpm_get_random(TPM_ANY_NUM, payload->key, key_len);
> + if (ret != key_len) {
> pr_info("trusted_key: key_create failed (%d)\n", ret);
> goto out;
> }
>
> --
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>

--
James Morris
<jmorris@xxxxxxxxx>
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