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

[David Wang <davidwang@zhaoxin.com>]

> -----邮件原件-----
> 发件人: David Wang [mailto:davidwang@zhaoxin.com]
> 发送时间: 2018年4月13日 15:03
> 收件人: mpm@selenic.com; herbert@gondor.apana.org.au; arnd@arndb.de;
> grehkg@linuxfoundation.org; linux-kernel@vger.kernel.org;
> linux-crypto@vger.kernel.org
> 抄送: brucechang@via-alliance.com; cooperyan@zhaoxin.com;
> qiyuanwang@zhaoxin.com; benjaminpan@viatech.com; lukelin@viacpu.com;
> timguo@zhaoxin.com; David Wang <davidwang@zhaoxin.com>
> 主题: [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 <davidwang@zhaoxin.com>
> ---
>  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
Sorry to write wrong email address of Greg.

---
David