Re: [PATCH v10, RESEND 4/6] tpm: move tpm_chip definition to include/linux/tpm.h

Nathan Chancellor
2019-02-08T04:24:19Z

On Wed, Feb 06, 2019 at 05:24:50PM +0100, Roberto Sassu wrote:
> The tpm_chip structure contains the list of PCR banks currently allocated
> in the TPM. When support for crypto agility will be added to the TPM
> driver, users of the driver have to provide a digest for each allocated
> bank to tpm_pcr_extend(). With this patch, they can obtain the PCR bank
> algorithms directly from chip->allocated_banks.
>
> Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com>
> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
> Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
> ---
> drivers/char/tpm/tpm.h | 101 ++---------------------------------------
> include/linux/tpm.h | 91 +++++++++++++++++++++++++++++++++++++
> 2 files changed, 95 insertions(+), 97 deletions(-)
>
> diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
> index 4efa304e9ece..4f85ce909122 100644
> --- a/drivers/char/tpm/tpm.h
> +++ b/drivers/char/tpm/tpm.h
> @@ -25,30 +25,22 @@
>
> #include <linux/module.h>
> #include <linux/delay.h>
> -#include <linux/fs.h>
> -#include <linux/hw_random.h>
> #include <linux/mutex.h>
> #include <linux/sched.h>
> #include <linux/platform_device.h>
> #include <linux/io.h>
> #include <linux/tpm.h>
> -#include <linux/acpi.h>
> -#include <linux/cdev.h>
> #include <linux/highmem.h>
> #include <linux/tpm_eventlog.h>
> -#include <crypto/hash_info.h>
>
> #ifdef CONFIG_X86
> #include <asm/intel-family.h>
> #endif
>
> -enum tpm_const {
> - TPM_MINOR = 224, /* officially assigned */
> - TPM_BUFSIZE = 4096,
> - TPM_NUM_DEVICES = 65536,
> - TPM_RETRY = 50, /* 5 seconds */
> - TPM_NUM_EVENT_LOG_FILES = 3,
> -};
> +#define TPM_MINOR 224 /* officially assigned */
> +#define TPM_BUFSIZE 4096
> +#define TPM_NUM_DEVICES 65536
> +#define TPM_RETRY 50
>
> enum tpm_timeout {
> TPM_TIMEOUT = 5, /* msecs */
> @@ -65,16 +57,6 @@ enum tpm_addr {
> TPM_ADDR = 0x4E,
> };
>
> -/* Indexes the duration array */
> -enum tpm_duration {
> - TPM_SHORT = 0,
> - TPM_MEDIUM = 1,
> - TPM_LONG = 2,
> - TPM_LONG_LONG = 3,
> - TPM_UNDEFINED,
> - TPM_NUM_DURATIONS = TPM_UNDEFINED,
> -};
> -
> #define TPM_WARN_RETRY 0x800
> #define TPM_WARN_DOING_SELFTEST 0x802
> #define TPM_ERR_DEACTIVATED 0x6
> @@ -179,15 +161,6 @@ enum tpm2_cc_attrs {
> #define TPM_VID_WINBOND 0x1050
> #define TPM_VID_STM 0x104A
>
> -#define TPM_PPI_VERSION_LEN 3
> -
> -struct tpm_space {
> - u32 context_tbl[3];
> - u8 *context_buf;
> - u32 session_tbl[3];
> - u8 *session_buf;
> -};
> -
> enum tpm_chip_flags {
> TPM_CHIP_FLAG_TPM2 = BIT(1),
> TPM_CHIP_FLAG_IRQ = BIT(2),
> @@ -196,72 +169,6 @@ enum tpm_chip_flags {
> TPM_CHIP_FLAG_ALWAYS_POWERED = BIT(5),
> };
>
> -struct tpm_bios_log {
> - void *bios_event_log;
> - void *bios_event_log_end;
> -};
> -
> -struct tpm_chip_seqops {
> - struct tpm_chip *chip;
> - const struct seq_operations *seqops;
> -};
> -
> -struct tpm_chip {
> - struct device dev;
> - struct device devs;
> - struct cdev cdev;
> - struct cdev cdevs;
> -
> - /* A driver callback under ops cannot be run unless ops_sem is held
> - * (sometimes implicitly, eg for the sysfs code). ops becomes null
> - * when the driver is unregistered, see tpm_try_get_ops.
> - */
> - struct rw_semaphore ops_sem;
> - const struct tpm_class_ops *ops;
> -
> - struct tpm_bios_log log;
> - struct tpm_chip_seqops bin_log_seqops;
> - struct tpm_chip_seqops ascii_log_seqops;
> -
> - unsigned int flags;
> -
> - int dev_num; /* /dev/tpm# */
> - unsigned long is_open; /* only one allowed */
> -
> - char hwrng_name[64];
> - struct hwrng hwrng;
> -
> - struct mutex tpm_mutex; /* tpm is processing */
> -
> - unsigned long timeout_a; /* jiffies */
> - unsigned long timeout_b; /* jiffies */
> - unsigned long timeout_c; /* jiffies */
> - unsigned long timeout_d; /* jiffies */
> - bool timeout_adjusted;
> - unsigned long duration[TPM_NUM_DURATIONS]; /* jiffies */
> - bool duration_adjusted;
> -
> - struct dentry *bios_dir[TPM_NUM_EVENT_LOG_FILES];
> -
> - const struct attribute_group *groups[3];
> - unsigned int groups_cnt;
> -
> - u32 nr_allocated_banks;
> - struct tpm_bank_info *allocated_banks;
> -#ifdef CONFIG_ACPI
> - acpi_handle acpi_dev_handle;
> - char ppi_version[TPM_PPI_VERSION_LEN + 1];
> -#endif /* CONFIG_ACPI */
> -
> - struct tpm_space work_space;
> - u32 last_cc;
> - u32 nr_commands;
> - u32 *cc_attrs_tbl;
> -
> - /* active locality */
> - int locality;
> -};
> -
> #define to_tpm_chip(d) container_of(d, struct tpm_chip, dev)
>
> struct tpm_header {
> diff --git a/include/linux/tpm.h b/include/linux/tpm.h
> index afd022fc9d3d..816e686a73ac 100644
> --- a/include/linux/tpm.h
> +++ b/include/linux/tpm.h
> @@ -22,6 +22,10 @@
> #ifndef __LINUX_TPM_H__
> #define __LINUX_TPM_H__
>
> +#include <linux/hw_random.h>
> +#include <linux/acpi.h>
> +#include <linux/cdev.h>
> +#include <linux/fs.h>
> #include <crypto/hash_info.h>
>
> #define TPM_DIGEST_SIZE 20 /* Max TPM v1.2 PCR size */
> @@ -75,6 +79,93 @@ struct tpm_class_ops {
> void (*clk_enable)(struct tpm_chip *chip, bool value);
> };
>
> +#define TPM_NUM_EVENT_LOG_FILES 3
> +
> +/* Indexes the duration array */
> +enum tpm_duration {
> + TPM_SHORT = 0,
> + TPM_MEDIUM = 1,
> + TPM_LONG = 2,
> + TPM_LONG_LONG = 3,
> + TPM_UNDEFINED,
> + TPM_NUM_DURATIONS = TPM_UNDEFINED,
> +};
> +
> +#define TPM_PPI_VERSION_LEN 3
> +
> +struct tpm_space {
> + u32 context_tbl[3];
> + u8 *context_buf;
> + u32 session_tbl[3];
> + u8 *session_buf;
> +};
> +
> +struct tpm_bios_log {
> + void *bios_event_log;
> + void *bios_event_log_end;
> +};
> +
> +struct tpm_chip_seqops {
> + struct tpm_chip *chip;
> + const struct seq_operations *seqops;
> +};
> +
> +struct tpm_chip {
> + struct device dev;
> + struct device devs;
> + struct cdev cdev;
> + struct cdev cdevs;
> +
> + /* A driver callback under ops cannot be run unless ops_sem is held
> + * (sometimes implicitly, eg for the sysfs code). ops becomes null
> + * when the driver is unregistered, see tpm_try_get_ops.
> + */
> + struct rw_semaphore ops_sem;
> + const struct tpm_class_ops *ops;
> +
> + struct tpm_bios_log log;
> + struct tpm_chip_seqops bin_log_seqops;
> + struct tpm_chip_seqops ascii_log_seqops;
> +
> + unsigned int flags;
> +
> + int dev_num; /* /dev/tpm# */
> + unsigned long is_open; /* only one allowed */
> +
> + char hwrng_name[64];
> + struct hwrng hwrng;
> +
> + struct mutex tpm_mutex; /* tpm is processing */
> +
> + unsigned long timeout_a; /* jiffies */
> + unsigned long timeout_b; /* jiffies */
> + unsigned long timeout_c; /* jiffies */
> + unsigned long timeout_d; /* jiffies */
> + bool timeout_adjusted;
> + unsigned long duration[TPM_NUM_DURATIONS]; /* jiffies */
> + bool duration_adjusted;
> +
> + struct dentry *bios_dir[TPM_NUM_EVENT_LOG_FILES];
> +
> + const struct attribute_group *groups[3];
> + unsigned int groups_cnt;
> +
> + u32 nr_allocated_banks;
> + struct tpm_bank_info *allocated_banks;
> +#ifdef CONFIG_ACPI
> + acpi_handle acpi_dev_handle;
> + char ppi_version[TPM_PPI_VERSION_LEN + 1];
> +#endif /* CONFIG_ACPI */
> +
> + struct tpm_space work_space;
> + u32 last_cc;
> + u32 nr_commands;
> + u32 *cc_attrs_tbl;
> +
> + /* active locality */
> + int locality;
> +};
> +
> #if defined(CONFIG_TCG_TPM) || defined(CONFIG_TCG_TPM_MODULE)
>
> extern int tpm_is_tpm2(struct tpm_chip *chip);
> --
> 2.17.1
>

Hi Robert,

This patch causes a build error with Clang (bisected on next-20190207):

security/integrity/ima/ima.h:191:2: error: redefinition of enumerator 'NONE'
__ima_hooks(__ima_hook_enumify)
^
security/integrity/ima/ima.h:176:7: note: expanded from macro '__ima_hooks'
hook(NONE) \
^
include/linux/efi.h:1709:2: note: previous definition is here
NONE,
^
1 error generated.

I am not sure how to reconcile this otherwise I would have sent a patch.

Thanks,
Nathan