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authorGlauber Costa <glommer@redhat.com>2008-09-22 14:35:08 -0300
committerIngo Molnar <mingo@elte.hu>2008-10-13 10:21:49 +0200
commite04d645f326bc8e591bc4ae21c4ab535987a17c1 (patch)
treed3a84449192afd9c418dcf52926c8be4be73f2dd /arch/x86/kernel/cpu/common.c
parent33c053d0aec344c8b2ad6966d904ebeff64e590b (diff)
x86: move vgetcpu mode probing to cpu detection
Take it out of time initialization and move it to cpu detection time. Signed-off-by: Glauber Costa <glommer@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/cpu/common.c')
-rw-r--r--arch/x86/kernel/cpu/common.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index 088fbdb6734..f1af7185191 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -719,12 +719,24 @@ static void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
#endif
}
+#ifdef CONFIG_X86_64
+static void vgetcpu_set_mode(void)
+{
+ if (cpu_has(&boot_cpu_data, X86_FEATURE_RDTSCP))
+ vgetcpu_mode = VGETCPU_RDTSCP;
+ else
+ vgetcpu_mode = VGETCPU_LSL;
+}
+#endif
+
void __init identify_boot_cpu(void)
{
identify_cpu(&boot_cpu_data);
#ifdef CONFIG_X86_32
sysenter_setup();
enable_sep_cpu();
+#else
+ vgetcpu_set_mode();
#endif
}