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| author | Pavel Tatashin <pasha.tatashin@oracle.com> | 2018-07-19 16:55:45 -0400 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2018-07-20 00:02:44 +0200 |
| commit | 8dbe438589f373544a1af8b4a859e4da853c0f90 (patch) | |
| tree | d5677d86892654b28d3db26bae192b3ece2637b3 /arch/x86/kernel/x86_init.c | |
| parent | 03821f451d2d2d7599061244734245be139014ea (diff) | |
| download | lwn-8dbe438589f373544a1af8b4a859e4da853c0f90.tar.gz lwn-8dbe438589f373544a1af8b4a859e4da853c0f90.zip | |
x86/tsc: Make use of tsc_calibrate_cpu_early()
During early boot enable tsc_calibrate_cpu_early() and switch to
tsc_calibrate_cpu() only later. Do this unconditionally, because it is
unknown what methods other cpus will use to calibrate once they are
onlined.
If by the time tsc_init() is called tsc frequency is still unknown do only
pit_hpet_ptimer_calibrate_cpu() to calibrate, as this function contains the
only methods wich have not been called and tried earlier.
Signed-off-by: Pavel Tatashin <pasha.tatashin@oracle.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: steven.sistare@oracle.com
Cc: daniel.m.jordan@oracle.com
Cc: linux@armlinux.org.uk
Cc: schwidefsky@de.ibm.com
Cc: heiko.carstens@de.ibm.com
Cc: john.stultz@linaro.org
Cc: sboyd@codeaurora.org
Cc: hpa@zytor.com
Cc: douly.fnst@cn.fujitsu.com
Cc: peterz@infradead.org
Cc: prarit@redhat.com
Cc: feng.tang@intel.com
Cc: pmladek@suse.com
Cc: gnomes@lxorguk.ukuu.org.uk
Cc: linux-s390@vger.kernel.org
Cc: boris.ostrovsky@oracle.com
Cc: jgross@suse.com
Cc: pbonzini@redhat.com
Link: https://lkml.kernel.org/r/20180719205545.16512-27-pasha.tatashin@oracle.com
Diffstat (limited to 'arch/x86/kernel/x86_init.c')
| -rw-r--r-- | arch/x86/kernel/x86_init.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kernel/x86_init.c b/arch/x86/kernel/x86_init.c index 3ab867603e81..2792b5573818 100644 --- a/arch/x86/kernel/x86_init.c +++ b/arch/x86/kernel/x86_init.c @@ -109,7 +109,7 @@ struct x86_cpuinit_ops x86_cpuinit = { static void default_nmi_init(void) { }; struct x86_platform_ops x86_platform __ro_after_init = { - .calibrate_cpu = native_calibrate_cpu, + .calibrate_cpu = native_calibrate_cpu_early, .calibrate_tsc = native_calibrate_tsc, .get_wallclock = mach_get_cmos_time, .set_wallclock = mach_set_rtc_mmss, |