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| author | Jason Gunthorpe <jgg@ziepe.ca> | 2017-11-17 14:24:03 +0100 |
|---|---|---|
| committer | Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> | 2018-01-08 11:58:36 +0100 |
| commit | 6e592a065d51d26f9d62b8b7501a5114076af8b4 (patch) | |
| tree | 7297d133dcf53bf910d7e3f16e8586b1426382cf /drivers/char/tpm/tpm.h | |
| parent | tpm: use struct tpm_chip for tpm_chip_find_get() (diff) | |
| download | linux-6e592a065d51d26f9d62b8b7501a5114076af8b4.tar.xz linux-6e592a065d51d26f9d62b8b7501a5114076af8b4.zip | |
tpm: Move Linux RNG connection to hwrng
The tpm-rng.c approach is completely inconsistent with how the kernel
handles hotplug. Instead manage a hwrng device for each TPM. This will
cause the kernel to read entropy from the TPM when it is plugged in, and
allow access to the TPM rng via /dev/hwrng.
Signed-off-by: Jason Gunthorpe <jgg@ziepe.ca>
Tested-by: PrasannaKumar Muralidharan <prasannatsmkumar@gmail.com>
Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Diffstat (limited to 'drivers/char/tpm/tpm.h')
| -rw-r--r-- | drivers/char/tpm/tpm.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h index 6c189174c0d3..605c0be2b8dc 100644 --- a/drivers/char/tpm/tpm.h +++ b/drivers/char/tpm/tpm.h @@ -26,6 +26,7 @@ #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> @@ -211,6 +212,9 @@ struct tpm_chip { 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 */ |