linux-kernel - [PATCH 5.0 021/123] x86/MCE/AMD: Turn off MC4_MISC thresholding on all family 0x15 models

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Date:   Mon, 20 May 2019 14:13:21 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Shirish S <shirish.s@....com>,
        Borislav Petkov <bp@...e.de>, "H. Peter Anvin" <hpa@...or.com>,
        Ingo Molnar <mingo@...hat.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Tony Luck <tony.luck@...el.com>,
        Vishal Verma <vishal.l.verma@...el.com>,
        x86-ml <x86@...nel.org>
Subject: [PATCH 5.0 021/123] x86/MCE/AMD: Turn off MC4_MISC thresholding on all family 0x15 models

From: Shirish S <Shirish.S@....com>

commit c95b323dcd3598dd7ef5005d6723c1ba3b801093 upstream.

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
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 arch/x86/kernel/cpu/mce/core.c |    5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

--- a/arch/x86/kernel/cpu/mce/core.c
+++ b/arch/x86/kernel/cpu/mce/core.c
@@ -1613,11 +1613,10 @@ static int __mcheck_cpu_apply_quirks(str
 			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;