linux-kernel - [PATCH v2 1/2] x86/mce: new Centaur CPUs support MCE broadcasting

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Mon, 2 Apr 2018 11:33:51 +0800
From:   David Wang <davidwang@...oxin.com>
To:     <tony.luck@...el.com>, <bp@...en8.de>, <tglx@...utronix.de>,
        <mingo@...hat.com>, <hpa@...or.com>, <x86@...nel.org>,
        <linux-edac@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC:     <brucechang@...-alliance.com>, <cooperyan@...oxin.com>,
        <qiyuanwang@...oxin.com>, <benjaminpan@...tech.com>,
        <lukelin@...cpu.com>, <timguo@...oxin.com>,
        David Wang <davidwang@...oxin.com>
Subject: [PATCH v2 1/2] x86/mce: new Centaur CPUs support MCE broadcasting

This patch is used to tell the kernel that newer Centaur CPU support
MCE broadcasting.

Signed-off-by: David Wang <davidwang@...oxin.com>
---
 arch/x86/kernel/cpu/mcheck/mce.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index 7065846..c3db7ce 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -1688,6 +1688,17 @@ static int __mcheck_cpu_apply_quirks(struct cpuinfo_x86 *c)
 		if (c->x86 == 6 && c->x86_model == 45)
 			quirk_no_way_out = quirk_sandybridge_ifu;
 	}
+
+	if (c->x86_vendor == X86_VENDOR_CENTAUR) {
+		/*
+		 * All newer Centaur CPUs support MCE broadcasting. Enable
+		 * synchronization with a one second timeout.
+		 */
+		if ((c->x86 > 6 || (c->x86 == 6 && c->x86_model == 0xf && c->x86_mask >=0xe)) &&
+			cfg->monarch_timeout < 0)
+			cfg->monarch_timeout = USEC_PER_SEC;
+	}
+
 	if (cfg->monarch_timeout < 0)
 		cfg->monarch_timeout = 0;
 	if (cfg->bootlog != 0)
-- 
1.9.1