Re: [PATCH] tpm: Move Linux RNG connection to hwrng

From: Jason Gunthorpe
Date: Tue Oct 24 2017 - 17:35:10 EST


On Tue, Oct 24, 2017 at 12:42:35PM -0600, Jason Gunthorpe wrote:

> This is compile tested only.

0day says the kconfig has a problem when randomized, here is the fix I
will roll into a v2 in a few days:

diff --git a/drivers/char/tpm/Kconfig b/drivers/char/tpm/Kconfig
index a95725fa77789e..ca89da3e4b2ae9 100644
--- a/drivers/char/tpm/Kconfig
+++ b/drivers/char/tpm/Kconfig
@@ -27,16 +27,13 @@ menuconfig TCG_TPM
if TCG_TPM

config HW_RANDOM_TPM
- tristate "TPM HW Random Number Generator support"
- depends on TCG_TPM && HW_RANDOM
- default HW_RANDOM
+ bool "TPM HW Random Number Generator support"
+ depends on TCG_TPM && HW_RANDOM && !(TCG_TPM=y && HW_RANDOM=m)
+ default y
---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.

config TCG_TIS_CORE