linux-kernel - [tip:ras/core] x86/MCE/AMD: Turn off MC4_MISC thresholding on all family 0x15 models

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Date:   Wed, 16 Jan 2019 11:30:54 -0800
From:   tip-bot for Shirish S <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     tony.luck@...el.com, shirish.s@....com, bp@...e.de,
        linux-kernel@...r.kernel.org, vishal.l.verma@...el.com,
        mingo@...hat.com, x86@...nel.org, tglx@...utronix.de,
        Shirish.S@....com, hpa@...or.com, mingo@...nel.org
Subject: [tip:ras/core] x86/MCE/AMD: Turn off MC4_MISC thresholding on all
 family 0x15 models

Commit-ID:  c95b323dcd3598dd7ef5005d6723c1ba3b801093
Gitweb:     https://git.kernel.org/tip/c95b323dcd3598dd7ef5005d6723c1ba3b801093
Author:     Shirish S <Shirish.S@....com>
AuthorDate: Thu, 10 Jan 2019 07:54:40 +0000
Committer:  Borislav Petkov <bp@...e.de>
CommitDate: Tue, 15 Jan 2019 18:11:38 +0100

x86/MCE/AMD: Turn off MC4_MISC thresholding on all family 0x15 models

MC4_MISC thresholding is not supported on all family 0x15 processors,
hence skip the x86_model check when applying the quirk.

 [ bp: massage commit message. ]

Signed-off-by: Shirish S <shirish.s@....com>
Signed-off-by: Borislav Petkov <bp@...e.de>
Cc: "H. Peter Anvin" <hpa@...or.com>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Tony Luck <tony.luck@...el.com>
Cc: Vishal Verma <vishal.l.verma@...el.com>
Cc: x86-ml <x86@...nel.org>
Link: https://lkml.kernel.org/r/1547106849-3476-2-git-send-email-shirish.s@amd.com
---
 arch/x86/kernel/cpu/mce/core.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/arch/x86/kernel/cpu/mce/core.c b/arch/x86/kernel/cpu/mce/core.c
index 672c7225cb1b..d0c54160b439 100644
--- a/arch/x86/kernel/cpu/mce/core.c
+++ b/arch/x86/kernel/cpu/mce/core.c
@@ -1612,11 +1612,10 @@ static int __mcheck_cpu_apply_quirks(struct cpuinfo_x86 *c)
 			mce_flags.overflow_recov = 1;
 
 		/*
-		 * Turn off MC4_MISC thresholding banks on those models since
+		 * Turn off MC4_MISC thresholding banks on all models since
 		 * they're not supported there.
 		 */
-		if (c->x86 == 0x15 &&
-		    (c->x86_model >= 0x10 && c->x86_model <= 0x1f)) {
+		if (c->x86 == 0x15) {
 			int i;
 			u64 hwcr;
 			bool need_toggle;