Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1486939

[tip:x86/timers] x86/tsc: Use cpu id defines instead of hex constants

Show all headers | View raw

Commit-ID:  655e52d2b62458032fc67ff7daaa664af6f36fb5
Gitweb:     http://git.kernel.org/tip/655e52d2b62458032fc67ff7daaa664af6f36fb5
Author:     Prarit Bhargava <prarit@redhat.com>
AuthorDate: Mon, 19 Sep 2016 08:51:40 -0400
Committer:  Thomas Gleixner <tglx@linutronix.de>
CommitDate: Tue, 20 Sep 2016 01:00:32 +0200

x86/tsc: Use cpu id defines instead of hex constants

asm/intel-family.h contains defines for cpu ids which should be used
instead of hex constants. Convert the switch case in native_calibrate_tsc()
to use the defines before adding more cpu models.

[ tglx: Massaged changelog ]

Signed-off-by: Prarit Bhargava <prarit@redhat.com>
Cc: Len Brown <len.brown@intel.com>
Cc: Rafael Aquini <aquini@redhat.com>
Cc: "Peter Zijlstra (Intel)" <peterz@infradead.org>
Cc: Andy Lutomirski <luto@kernel.org>
Link: http://lkml.kernel.org/r/1474289501-31717-2-git-send-email-prarit@redhat.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

---
 arch/x86/kernel/tsc.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/arch/x86/kernel/tsc.c b/arch/x86/kernel/tsc.c
index 78b9cb5..2344758 100644
--- a/arch/x86/kernel/tsc.c
+++ b/arch/x86/kernel/tsc.c
@@ -23,6 +23,7 @@
 #include <asm/x86_init.h>
 #include <asm/geode.h>
 #include <asm/apic.h>
+#include <asm/intel-family.h>
 
 unsigned int __read_mostly cpu_khz;	/* TSC clocks / usec, not used here */
 EXPORT_SYMBOL(cpu_khz);
@@ -686,11 +687,11 @@ unsigned long native_calibrate_tsc(void)
 
 	if (crystal_khz == 0) {
 		switch (boot_cpu_data.x86_model) {
-		case 0x4E:	/* SKL */
-		case 0x5E:	/* SKL */
+		case INTEL_FAM6_SKYLAKE_MOBILE:
+		case INTEL_FAM6_SKYLAKE_DESKTOP:
 			crystal_khz = 24000;	/* 24.0 MHz */
 			break;
-		case 0x5C:	/* BXT */
+		case INTEL_FAM6_ATOM_GOLDMONT:
 			crystal_khz = 19200;	/* 19.2 MHz */
 			break;
 		}

Back to linux.kernel | Previous | Next — Previous in thread | Find similar | Unroll thread

Thread

[PATCH 1/2 v2] x86,tsc: Use cpu id defines from intel-family.h Prarit Bhargava <prarit@redhat.com> - 2016-09-19 15:00 +0200
  [tip:x86/timers] x86/tsc: Use cpu id defines instead of hex  constants tip-bot for Prarit Bhargava <tipbot@zytor.com> - 2016-09-20 01:10 +0200

csiph-web