linux-kernel - [tip:x86/timers] x86/tsc_msr: Add Airmont reference clock values

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Message-ID: <tip-6fcb41cdaee5056c96de88ee095bddd27a7697de@git.kernel.org>
Date:	Sun, 10 Jul 2016 11:12:03 -0700
From:	tip-bot for Len Brown <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	hpa@...or.com, peterz@...radead.org, torvalds@...ux-foundation.org,
	tglx@...utronix.de, stephane.gasparini@...el.com, mingo@...nel.org,
	linux-kernel@...r.kernel.org, len.brown@...el.com
Subject: [tip:x86/timers] x86/tsc_msr: Add Airmont reference clock values

Commit-ID:  6fcb41cdaee5056c96de88ee095bddd27a7697de
Gitweb:     http://git.kernel.org/tip/6fcb41cdaee5056c96de88ee095bddd27a7697de
Author:     Len Brown <len.brown@...el.com>
AuthorDate: Fri, 17 Jun 2016 01:22:48 -0400
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Sun, 10 Jul 2016 17:00:13 +0200

x86/tsc_msr: Add Airmont reference clock values

per the Intel 64 and IA-32 Architecture Software Developer's Manual...

Add the reference clock for Intel Atom Processors
Based on the Airmont Microarchitecture.

Reported-by: Stephane Gasparini <stephane.gasparini@...el.com>
Signed-off-by: Len Brown <len.brown@...el.com>
Reviewed-by: Thomas Gleixner <tglx@...utronix.de>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Link: http://lkml.kernel.org/r/abc6a0f4b18281410da1a3f26e2819d8e03e144f.1466138954.git.len.brown@intel.com
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 arch/x86/kernel/tsc_msr.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/arch/x86/kernel/tsc_msr.c b/arch/x86/kernel/tsc_msr.c
index 20487e2..65b3d8cb 100644
--- a/arch/x86/kernel/tsc_msr.c
+++ b/arch/x86/kernel/tsc_msr.c
@@ -13,7 +13,7 @@
 #include <asm/apic.h>
 #include <asm/param.h>
 
-#define MAX_NUM_FREQS	8
+#define MAX_NUM_FREQS	9
 
 /*
  * If MSR_PERF_STAT[31] is set, the maximum resolved bus ratio can be
@@ -40,6 +40,9 @@ static struct freq_desc freq_desc_tables[] = {
 	{ 6, 0x37, 1, { 83300, 100000, 133300, 116700, 80000, 0, 0, 0 } },
 	/* ANN - Intel Atom processor Z3500 series */
 	{ 6, 0x5a, 1, { 83300, 100000, 133300, 100000, 0, 0, 0, 0 } },
+	/* AMT - Intel Atom processor X7-Z8000 and X5-Z8000 series */
+	{ 6, 0x4c, 1, { 83300, 100000, 133300, 116700,
+			80000, 93300, 90000, 88900, 87500 } },
 };
 
 static int match_cpu(u8 family, u8 model)