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authorLen Brown <len.brown@intel.com>2017-12-22 08:27:56 +0300
committerThomas Gleixner <tglx@linutronix.de>2018-01-14 14:14:50 +0300
commit4b5b2127238e689ee18aa6752959751dd61c4c73 (patch)
treebe8defe035a8f4ebc2c4c34910a348b9183ef220 /arch/x86/kernel/tsc.c
parentb511203093489eb1829cb4de86e8214752205ac6 (diff)
downloadlinux-4b5b2127238e689ee18aa6752959751dd61c4c73.tar.xz
x86/tsc: Print tsc_khz, when it differs from cpu_khz
If CPU and TSC frequency are the same the printout of the CPU frequency is valid for the TSC as well: tsc: Detected 2900.000 MHz processor If the TSC frequency is different there is no information in dmesg. Add a conditional printout: tsc: Detected 2904.000 MHz TSC Signed-off-by: Len Brown <len.brown@intel.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: peterz@infradead.org Link: https://lkml.kernel.org/r/537b342debcd8e8aebc8d631015dcdf9f9ba8a26.1513920414.git.len.brown@intel.com
Diffstat (limited to 'arch/x86/kernel/tsc.c')
-rw-r--r--arch/x86/kernel/tsc.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/x86/kernel/tsc.c b/arch/x86/kernel/tsc.c
index 3bf4df7f52d7..e169e85db434 100644
--- a/arch/x86/kernel/tsc.c
+++ b/arch/x86/kernel/tsc.c
@@ -1316,6 +1316,12 @@ void __init tsc_init(void)
(unsigned long)cpu_khz / 1000,
(unsigned long)cpu_khz % 1000);
+ if (cpu_khz != tsc_khz) {
+ pr_info("Detected %lu.%03lu MHz TSC",
+ (unsigned long)tsc_khz / 1000,
+ (unsigned long)tsc_khz % 1000);
+ }
+
/* Sanitize TSC ADJUST before cyc2ns gets initialized */
tsc_store_and_check_tsc_adjust(true);