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From: Bin Meng <bmeng.cn@gmail.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH 2/6] x86: tsc: Identify Intel-specific code
Date: Tue, 25 Jul 2017 20:12:01 -0700	[thread overview]
Message-ID: <1501038725-20850-2-git-send-email-bmeng.cn@gmail.com> (raw)
In-Reply-To: <1501038725-20850-1-git-send-email-bmeng.cn@gmail.com>

cpu_mhz_from_msr() is currently Intel-specific, and should not
execute on any other vendor's parts.

This keeps in sync with Linux kernel commit:
  ba82683: x86/tsc_msr: Identify Intel-specific code

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
---

 drivers/timer/tsc_timer.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/timer/tsc_timer.c b/drivers/timer/tsc_timer.c
index ffbc709..4d01c9b 100644
--- a/drivers/timer/tsc_timer.c
+++ b/drivers/timer/tsc_timer.c
@@ -11,6 +11,7 @@
 #include <dm.h>
 #include <malloc.h>
 #include <timer.h>
+#include <asm/cpu.h>
 #include <asm/io.h>
 #include <asm/i8254.h>
 #include <asm/ibmpc.h>
@@ -86,6 +87,9 @@ static unsigned long __maybe_unused try_msr_calibrate_tsc(void)
 	unsigned long res;
 	int cpu_index;
 
+	if (gd->arch.x86_vendor != X86_VENDOR_INTEL)
+		return 0;
+
 	cpu_index = match_cpu(gd->arch.x86, gd->arch.x86_model);
 	if (cpu_index < 0)
 		return 0;
-- 
2.9.2

  reply	other threads:[~2017-07-26  3:12 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-07-26  3:12 [U-Boot] [PATCH 1/6] x86: tsc: Read all ratio bits from MSR_PLATFORM_INFO Bin Meng
2017-07-26  3:12 ` Bin Meng [this message]
2017-07-26  3:16   ` [U-Boot] [PATCH 2/6] x86: tsc: Identify Intel-specific code Bin Meng
2017-08-01  9:11   ` Simon Glass
2017-08-01 12:21     ` Bin Meng
2017-07-26  3:12 ` [U-Boot] [PATCH 3/6] x86: tsc: Remove the fail handling in try_msr_calibrate_tsc() Bin Meng
2017-08-01  9:11   ` Simon Glass
2017-08-01 12:21     ` Bin Meng
2017-07-26  3:12 ` [U-Boot] [PATCH 4/6] x86: tsc: Update comments and expand definitions in freq_desc_tables[] Bin Meng
2017-08-01  9:11   ` Simon Glass
2017-08-01 12:21     ` Bin Meng
2017-07-26  3:12 ` [U-Boot] [PATCH 5/6] x86: tsc: Correct Silvermont reference clock values Bin Meng
2017-08-01  9:11   ` Simon Glass
2017-08-01 12:21     ` Bin Meng
2017-07-26  3:12 ` [U-Boot] [PATCH 6/6] x86: tsc: Rename try_msr_calibrate_tsc() to cpu_mhz_from_msr() Bin Meng
2017-08-01  9:11   ` Simon Glass
2017-08-01 12:22     ` Bin Meng
2017-08-01  9:10 ` [U-Boot] [PATCH 1/6] x86: tsc: Read all ratio bits from MSR_PLATFORM_INFO Simon Glass
2017-08-01 12:21   ` Bin Meng

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