2018-04-13 07:04:52

by David Wang

Subject: [PATCH] hwrng: via-rng - support new Centaur CPU

New Centaur CPU(Family > 6) supprt Random Number Generator, but can't
support MSR_VIA_RNG. Just like VIA Nano.

Signed-off-by: David Wang <[email protected]>
---
drivers/char/hw_random/via-rng.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/char/hw_random/via-rng.c b/drivers/char/hw_random/via-rng.c
index d1f5bb5..d9448b1 100644
--- a/drivers/char/hw_random/via-rng.c
+++ b/drivers/char/hw_random/via-rng.c
@@ -135,7 +135,7 @@ static int via_rng_init(struct hwrng *rng)
* is always enabled if CPUID rng_en is set. There is no
* RNG configuration like it used to be the case in this
* register */
- if ((c->x86 == 6) && (c->x86_model >= 0x0f)) {
+ if (((c->x86 == 6) && (c->x86_model >= 0x0f)) || (c->x86 > 6)){
if (!boot_cpu_has(X86_FEATURE_XSTORE_EN)) {
pr_err(PFX "can't enable hardware RNG "
"if XSTORE is not enabled\n");
--
1.9.1

2018-04-20 17:08:41

by Herbert Xu

Subject: Re: [PATCH] hwrng: via-rng - support new Centaur CPU

On Fri, Apr 13, 2018 at 03:03:03PM +0800, David Wang wrote:
> New Centaur CPU(Family > 6) supprt Random Number Generator, but can't
> support MSR_VIA_RNG. Just like VIA Nano.
>
> Signed-off-by: David Wang <[email protected]>

Patch applied. Thanks.
--
Email: Herbert Xu <[email protected]>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt