From: David Wang <davidwang@zhaoxin.com>
To: <mpm@selenic.com>, <herbert@gondor.apana.org.au>, <arnd@arndb.de>,
<grehkg@linuxfoundation.org>, <linux-kernel@vger.kernel.org>,
<linux-crypto@vger.kernel.org>
Cc: <brucechang@via-alliance.com>, <cooperyan@zhaoxin.com>,
<qiyuanwang@zhaoxin.com>, <benjaminpan@viatech.com>,
<lukelin@viacpu.com>, <timguo@zhaoxin.com>,
David Wang <davidwang@zhaoxin.com>
Subject: [PATCH] hwrng: via-rng - support new Centaur CPU
Date: Fri, 13 Apr 2018 15:03:03 +0800 [thread overview]
Message-ID: <1523602983-3418-1-git-send-email-davidwang@zhaoxin.com> (raw)
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
next reply other threads:[~2018-04-13 7:03 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-13 7:03 David Wang [this message]
2018-04-16 2:30 ` 答复: " David Wang
2018-04-20 17:05 ` Herbert Xu
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