blob: 2431b4ada2fa7eaf7bd709395b09d8e74a296483 [file] [log] [blame]
/* SPDX-License-Identifier: GPL-2.0-or-later */
* Definitions for measuring cputime on powerpc machines.
* Copyright (C) 2006 Paul Mackerras, IBM Corp.
* If we have CONFIG_VIRT_CPU_ACCOUNTING_NATIVE, we measure cpu time in
* the same units as the timebase. Otherwise we measure cpu time
* in jiffies using the generic definitions.
#include <linux/types.h>
#include <linux/time.h>
#include <asm/div64.h>
#include <asm/time.h>
#include <asm/param.h>
typedef u64 __nocast cputime_t;
typedef u64 __nocast cputime64_t;
#define cmpxchg_cputime(ptr, old, new) cmpxchg(ptr, old, new)
#ifdef __KERNEL__
* Convert cputime <-> microseconds
extern u64 __cputime_usec_factor;
static inline unsigned long cputime_to_usecs(const cputime_t ct)
return mulhdu((__force u64) ct, __cputime_usec_factor);
* PPC64 uses PACA which is task independent for storing accounting data while
* PPC32 uses struct thread_info, therefore at task switch the accounting data
* has to be populated in the new task
#ifdef CONFIG_PPC64
#define get_accounting(tsk) (&get_paca()->accounting)
static inline void arch_vtime_task_switch(struct task_struct *tsk) { }
#define get_accounting(tsk) (&task_thread_info(tsk)->accounting)
* Called from the context switch with interrupts disabled, to charge all
* accumulated times to the current process, and to prepare accounting on
* the next process.
static inline void arch_vtime_task_switch(struct task_struct *prev)
struct cpu_accounting_data *acct = get_accounting(current);
struct cpu_accounting_data *acct0 = get_accounting(prev);
acct->starttime = acct0->starttime;
#endif /* __KERNEL__ */
#endif /* __POWERPC_CPUTIME_H */