mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2026-03-03 18:28:01 +01:00
39965afb11
The only user of paravirt_sched_clock() is in tsc.c, so move the code from paravirt.c and paravirt.h to tsc.c. Signed-off-by: Juergen Gross <jgross@suse.com> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://patch.msgid.link/20260105110520.21356-13-jgross@suse.com
38 lines
1.0 KiB
C
38 lines
1.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _ASM_X86_TIMER_H
|
|
#define _ASM_X86_TIMER_H
|
|
#include <linux/pm.h>
|
|
#include <linux/percpu.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/math64.h>
|
|
|
|
unsigned long long native_sched_clock(void);
|
|
extern void recalibrate_cpu_khz(void);
|
|
|
|
extern int no_timer_check;
|
|
|
|
extern bool using_native_sched_clock(void);
|
|
void paravirt_set_sched_clock(u64 (*func)(void));
|
|
|
|
/*
|
|
* We use the full linear equation: f(x) = a + b*x, in order to allow
|
|
* a continuous function in the face of dynamic freq changes.
|
|
*
|
|
* Continuity means that when our frequency changes our slope (b); we want to
|
|
* ensure that: f(t) == f'(t), which gives: a + b*t == a' + b'*t.
|
|
*
|
|
* Without an offset (a) the above would not be possible.
|
|
*
|
|
* See the comment near cycles_2_ns() for details on how we compute (b).
|
|
*/
|
|
struct cyc2ns_data {
|
|
u32 cyc2ns_mul;
|
|
u32 cyc2ns_shift;
|
|
u64 cyc2ns_offset;
|
|
}; /* 16 bytes */
|
|
|
|
extern void cyc2ns_read_begin(struct cyc2ns_data *);
|
|
extern void cyc2ns_read_end(void);
|
|
|
|
#endif /* _ASM_X86_TIMER_H */
|