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From: Borislav Petkov <bp@alien8.de>
To: David Wang <davidwang@zhaoxin.com>
Cc: tony.luck@intel.com, tglx@linutronix.de, mingo@redhat.com,
	hpa@zytor.com, gregkh@linuxfoundation.org, x86@kernel.org,
	linux-kernel@vger.kernel.org, linux-edac@vger.kernel.org,
	brucechang@via-alliance.com, cooperyan@zhaoxin.com,
	qiyuanwang@zhaoxin.com, benjaminpan@viatech.com,
	lukelin@viacpu.com, timguo@zhaoxin.com
Subject: Re: [PATCH v3 1/2] x86/mce: new Centaur CPU support MCE broadcasting
Date: Mon, 30 Apr 2018 11:41:44 +0200	[thread overview]
Message-ID: <20180430094144.GE6509@pd.tnic> (raw)
In-Reply-To: <1524652420-17330-2-git-send-email-davidwang@zhaoxin.com>

On Wed, Apr 25, 2018 at 06:33:39PM +0800, David Wang wrote:
> Newer Centaur multi-core CPU also support MCE broadcasting to all cores. But
> no Centaur special code tell this truth to kernel.  
> 
> Signed-off-by: David Wang <davidwang@zhaoxin.com>
> ---
>  arch/x86/kernel/cpu/mcheck/mce.c | 19 +++++++++++++++++++
>  1 file changed, 19 insertions(+)

I applied this with some minor improvements:

---
From: David Wang <davidwang@zhaoxin.com>
Date: Wed, 25 Apr 2018 18:33:39 +0800
Subject: [PATCH] x86/MCA: Enable MCE broadcasting on new Centaur CPUs

Newer Centaur multi-core CPUs also support MCE broadcasting to all
cores. Add a Centaur-specific init function setting that up.

 [ bp:
   - make mce_centaur_feature_init() static
   - flip check to do the f/m/s first for better readability
   - touch up text
  ]

Signed-off-by: David Wang <davidwang@zhaoxin.com>
Cc: Greg KH <greg@kroah.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: benjaminpan@viatech.com
Cc: brucechang@via-alliance.com
Cc: cooperyan@zhaoxin.com
Cc: lukelin@viacpu.com
Cc: qiyuanwang@zhaoxin.com
Cc: timguo@zhaoxin.com
Cc: x86-ml <x86@kernel.org>
Cc: linux-edac <linux-edac@vger.kernel.org>
Link: http://lkml.kernel.org/r/1524652420-17330-2-git-send-email-davidwang@zhaoxin.com
Signed-off-by: Borislav Petkov <bp@suse.de>
---
 arch/x86/kernel/cpu/mcheck/mce.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index 42cf2880d0ed..cd76380af79f 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -1727,6 +1727,21 @@ static void __mcheck_cpu_init_early(struct cpuinfo_x86 *c)
 	}
 }
 
+static void mce_centaur_feature_init(struct cpuinfo_x86 *c)
+{
+	struct mca_config *cfg = &mca_cfg;
+
+	 /*
+	  * All newer Centaur CPUs support MCE broadcasting. Enable
+	  * synchronization with a one second timeout.
+	  */
+	if ((c->x86 == 6 && c->x86_model == 0xf && c->x86_stepping >= 0xe) ||
+	     c->x86 > 6) {
+		if (cfg->monarch_timeout < 0)
+			cfg->monarch_timeout = USEC_PER_SEC;
+	}
+}
+
 static void __mcheck_cpu_init_vendor(struct cpuinfo_x86 *c)
 {
 	switch (c->x86_vendor) {
@@ -1739,6 +1754,9 @@ static void __mcheck_cpu_init_vendor(struct cpuinfo_x86 *c)
 		mce_amd_feature_init(c);
 		break;
 		}
+	case X86_VENDOR_CENTAUR:
+		mce_centaur_feature_init(c);
+		break;
 
 	default:
 		break;
-- 
2.13.0

-- 
Regards/Gruss,
    Boris.

Good mailing practices for 400: avoid top-posting and trim the reply.

  reply	other threads:[~2018-04-30  9:41 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-25 10:33 [PATCH v3 0/2] MCA support for Centaur CPUs David Wang
2018-04-25 10:33 ` [PATCH v3 1/2] x86/mce: new Centaur CPU support MCE broadcasting David Wang
2018-04-30  9:41   ` Borislav Petkov [this message]
2018-05-06 10:51   ` [tip:ras/core] x86/MCE: Enable MCE broadcasting on new Centaur CPUs tip-bot for David Wang
2018-04-25 10:33 ` [PATCH v3 2/2] x86/mce: add CMCI support for " David Wang
2018-04-30  9:48   ` Borislav Petkov

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