mirror of
https://github.com/torvalds/linux.git
synced 2024-12-12 06:02:38 +00:00
f985adaf2f
cputime_t was a core kernel type, removed by commits ed5c8c854f2b..b672592f0221. As explained in commitb672592f02("sched/cputime: Remove generic asm headers"), the final cleanup is for the arch to provide cputime_to_nsec[s](). Commitade7667a98("powerpc: Add cputime_to_nsecs()") did that, but justdidn't remove the then-unused cputime_to_usecs(), cputime_t type, and associated remnants. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20221006105653.115829-1-npiggin@gmail.com
101 lines
2.7 KiB
C
101 lines
2.7 KiB
C
/* 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.
|
|
*/
|
|
|
|
#ifndef __POWERPC_CPUTIME_H
|
|
#define __POWERPC_CPUTIME_H
|
|
|
|
#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/time.h>
|
|
#include <asm/div64.h>
|
|
#include <asm/time.h>
|
|
#include <asm/param.h>
|
|
#include <asm/firmware.h>
|
|
|
|
#ifdef __KERNEL__
|
|
#define cputime_to_nsecs(cputime) tb_to_ns(cputime)
|
|
|
|
/*
|
|
* 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)
|
|
#define raw_get_accounting(tsk) (&local_paca->accounting)
|
|
static inline void arch_vtime_task_switch(struct task_struct *tsk) { }
|
|
|
|
#else
|
|
#define get_accounting(tsk) (&task_thread_info(tsk)->accounting)
|
|
#define raw_get_accounting(tsk) get_accounting(tsk)
|
|
/*
|
|
* 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
|
|
|
|
/*
|
|
* account_cpu_user_entry/exit runs "unreconciled", so can't trace,
|
|
* can't use get_paca()
|
|
*/
|
|
static notrace inline void account_cpu_user_entry(void)
|
|
{
|
|
unsigned long tb = mftb();
|
|
struct cpu_accounting_data *acct = raw_get_accounting(current);
|
|
|
|
acct->utime += (tb - acct->starttime_user);
|
|
acct->starttime = tb;
|
|
}
|
|
|
|
static notrace inline void account_cpu_user_exit(void)
|
|
{
|
|
unsigned long tb = mftb();
|
|
struct cpu_accounting_data *acct = raw_get_accounting(current);
|
|
|
|
acct->stime += (tb - acct->starttime);
|
|
acct->starttime_user = tb;
|
|
}
|
|
|
|
static notrace inline void account_stolen_time(void)
|
|
{
|
|
#ifdef CONFIG_PPC_SPLPAR
|
|
if (firmware_has_feature(FW_FEATURE_SPLPAR)) {
|
|
struct lppaca *lp = local_paca->lppaca_ptr;
|
|
|
|
if (unlikely(local_paca->dtl_ridx != be64_to_cpu(lp->dtl_idx)))
|
|
pseries_accumulate_stolen_time();
|
|
}
|
|
#endif
|
|
}
|
|
|
|
#endif /* __KERNEL__ */
|
|
#else /* CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */
|
|
static inline void account_cpu_user_entry(void)
|
|
{
|
|
}
|
|
static inline void account_cpu_user_exit(void)
|
|
{
|
|
}
|
|
static notrace inline void account_stolen_time(void)
|
|
{
|
|
}
|
|
#endif /* CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */
|
|
#endif /* __POWERPC_CPUTIME_H */
|