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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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ee238e5ca6
This patch add provisions for time related functions so they
can be later replaced by paravirt versions.
it basically encloses {g,s}et_wallclock inside the
already existent functions update_persistent_clock and
read_persistent_clock, and defines {s,g}et_wallclock
to the core of such functions.
it also allow for a later-on-game time initialization, as done
by i386. Paravirt guests can set a function to do their own
initialization this way.
Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Acked-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
61 lines
1.1 KiB
C
61 lines
1.1 KiB
C
#ifndef _ASMX86_TIME_H
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#define _ASMX86_TIME_H
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extern void (*late_time_init)(void);
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extern void hpet_time_init(void);
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#include <asm/mc146818rtc.h>
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#ifdef CONFIG_X86_32
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#include <linux/efi.h>
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static inline unsigned long native_get_wallclock(void)
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{
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unsigned long retval;
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if (efi_enabled)
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retval = efi_get_time();
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else
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retval = mach_get_cmos_time();
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return retval;
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}
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static inline int native_set_wallclock(unsigned long nowtime)
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{
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int retval;
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if (efi_enabled)
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retval = efi_set_rtc_mmss(nowtime);
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else
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retval = mach_set_rtc_mmss(nowtime);
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return retval;
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}
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#else
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extern void native_time_init_hook(void);
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static inline unsigned long native_get_wallclock(void)
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{
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return mach_get_cmos_time();
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}
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static inline int native_set_wallclock(unsigned long nowtime)
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{
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return mach_set_rtc_mmss(nowtime);
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}
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#endif
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#ifdef CONFIG_PARAVIRT
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#include <asm/paravirt.h>
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#else /* !CONFIG_PARAVIRT */
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#define get_wallclock() native_get_wallclock()
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#define set_wallclock(x) native_set_wallclock(x)
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#define choose_time_init() hpet_time_init
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#endif /* CONFIG_PARAVIRT */
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#endif
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