apfs/linux-apfs
0
0
Fork 0
mirror of https://github.com/linux-apfs/linux-apfs.git synced 2026-05-01 15:00:59 -07:00
Code Issues Packages Projects Releases Wiki Activity

ARM: 7522/1: arch_timers: register a time/cycle counter

Browse Source 
Some subsystems (KVM for example) need access to a cycle counter.
In the KVM case, this is used to measure the time delta between
host and guest in order to accurately generate timer events for
the guest.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Marc Zyngier
2012-09-07 18:09:58 +01:00
committed by Russell King
parent f48b5f1279
commit a1b2dde704
2 changed files with 32 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
arch/arm/include/asm/arch_timer.h
+7
View File
@@ -2,11 +2,13 @@
#define __ASMARM_ARCH_TIMER_H
#include <asm/errno.h>
#include <linux/clocksource.h>
#ifdef CONFIG_ARM_ARCH_TIMER
#define ARCH_HAS_READ_CURRENT_TIMER
int arch_timer_of_register(void);
int arch_timer_sched_clock_init(void);
struct timecounter *arch_timer_get_timecounter(void);
#else
static inline int arch_timer_of_register(void)
{
@@ -17,6 +19,11 @@ static inline int arch_timer_sched_clock_init(void)
{
return -ENXIO;
}
static inline struct timecounter *arch_timer_get_timecounter(void)
{
return NULL;
}
#endif
#endif