diff options
| author | Jason Gunthorpe <jgg@ziepe.ca> | 2017-11-17 15:24:03 +0200 |
|---|---|---|
| committer | Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> | 2018-01-08 12:58:36 +0200 |
| commit | 6e592a065d51d26f9d62b8b7501a5114076af8b4 (patch) | |
| tree | 7297d133dcf53bf910d7e3f16e8586b1426382cf /drivers/char/tpm/Kconfig | |
| parent | aad887f6641145fec2a801da2ce4ed36cf99c6a5 (diff) | |
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/Kconfig')
| -rw-r--r-- | drivers/char/tpm/Kconfig | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/char/tpm/Kconfig b/drivers/char/tpm/Kconfig index a30352202f1f..18c81cbe4704 100644 --- a/drivers/char/tpm/Kconfig +++ b/drivers/char/tpm/Kconfig @@ -26,6 +26,17 @@ menuconfig TCG_TPM if TCG_TPM +config HW_RANDOM_TPM + bool "TPM HW Random Number Generator support" + depends on TCG_TPM && HW_RANDOM && !(TCG_TPM=y && HW_RANDOM=m) + default y + ---help--- + This setting exposes the TPM's Random Number Generator as a hwrng + device. This allows the kernel to collect randomness from the TPM at + boot, and provides the TPM randomines in /dev/hwrng. + + If unsure, say Y. + config TCG_TIS_CORE tristate ---help--- |