1/* SPDX-License-Identifier: GPL-2.0-or-later */
  2/*
  3 * Definitions for measuring cputime on powerpc machines.
  4 *
  5 * Copyright (C) 2006 Paul Mackerras, IBM Corp.
  6 *
  7 * If we have CONFIG_VIRT_CPU_ACCOUNTING_NATIVE, we measure cpu time in
  8 * the same units as the timebase.  Otherwise we measure cpu time
  9 * in jiffies using the generic definitions.
 10 */
 11
 12#ifndef __POWERPC_CPUTIME_H
 13#define __POWERPC_CPUTIME_H
 14
 15#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
 16
 17#include <linux/types.h>
 18#include <linux/time.h>
 19#include <asm/div64.h>
 20#include <asm/time.h>
 21#include <asm/param.h>
 22#include <asm/firmware.h>
 23
 24#ifdef __KERNEL__
 25#define cputime_to_nsecs(cputime) tb_to_ns(cputime)
 26
 27/*
 28 * PPC64 uses PACA which is task independent for storing accounting data while
 29 * PPC32 uses struct thread_info, therefore at task switch the accounting data
 30 * has to be populated in the new task
 31 */
 32#ifdef CONFIG_PPC64
 33#define get_accounting(tsk)	(&get_paca()->accounting)
 34#define raw_get_accounting(tsk)	(&local_paca->accounting)
 35static inline void arch_vtime_task_switch(struct task_struct *tsk) { }
 36
 37#else
 38#define get_accounting(tsk)	(&task_thread_info(tsk)->accounting)
 39#define raw_get_accounting(tsk)	get_accounting(tsk)
 40/*
 41 * Called from the context switch with interrupts disabled, to charge all
 42 * accumulated times to the current process, and to prepare accounting on
 43 * the next process.
 44 */
 45static inline void arch_vtime_task_switch(struct task_struct *prev)
 46{
 47	struct cpu_accounting_data *acct = get_accounting(current);
 48	struct cpu_accounting_data *acct0 = get_accounting(prev);
 49
 50	acct->starttime = acct0->starttime;
 51}
 52#endif
 53
 54/*
 55 * account_cpu_user_entry/exit runs "unreconciled", so can't trace,
 56 * can't use get_paca()
 57 */
 58static notrace inline void account_cpu_user_entry(void)
 59{
 60	unsigned long tb = mftb();
 61	struct cpu_accounting_data *acct = raw_get_accounting(current);
 62
 63	acct->utime += (tb - acct->starttime_user);
 64	acct->starttime = tb;
 65}
 66
 67static notrace inline void account_cpu_user_exit(void)
 68{
 69	unsigned long tb = mftb();
 70	struct cpu_accounting_data *acct = raw_get_accounting(current);
 71
 72	acct->stime += (tb - acct->starttime);
 73	acct->starttime_user = tb;
 74}
 75
 76static notrace inline void account_stolen_time(void)
 77{
 78#ifdef CONFIG_PPC_SPLPAR
 79	if (firmware_has_feature(FW_FEATURE_SPLPAR)) {
 80		struct lppaca *lp = local_paca->lppaca_ptr;
 81
 82		if (unlikely(local_paca->dtl_ridx != be64_to_cpu(lp->dtl_idx)))
 83			pseries_accumulate_stolen_time();
 84	}
 85#endif
 86}
 87
 88#endif /* __KERNEL__ */
 89#else /* CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */
 90static inline void account_cpu_user_entry(void)
 91{
 92}
 93static inline void account_cpu_user_exit(void)
 94{
 95}
 96static notrace inline void account_stolen_time(void)
 97{
 98}
 99#endif /* CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */
100#endif /* __POWERPC_CPUTIME_H */

  1/* SPDX-License-Identifier: GPL-2.0-or-later */
  2/*
  3 * Definitions for measuring cputime on powerpc machines.
  4 *
  5 * Copyright (C) 2006 Paul Mackerras, IBM Corp.
  6 *
  7 * If we have CONFIG_VIRT_CPU_ACCOUNTING_NATIVE, we measure cpu time in
  8 * the same units as the timebase.  Otherwise we measure cpu time
  9 * in jiffies using the generic definitions.
 10 */
 11
 12#ifndef __POWERPC_CPUTIME_H
 13#define __POWERPC_CPUTIME_H
 14
 15#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
 16
 17#include <linux/types.h>
 18#include <linux/time.h>
 19#include <asm/div64.h>
 20#include <asm/time.h>
 21#include <asm/param.h>
 22#include <asm/firmware.h>
 23
 24#ifdef __KERNEL__
 25#define cputime_to_nsecs(cputime) tb_to_ns(cputime)
 26
 27/*
 28 * PPC64 uses PACA which is task independent for storing accounting data while
 29 * PPC32 uses struct thread_info, therefore at task switch the accounting data
 30 * has to be populated in the new task
 31 */
 32#ifdef CONFIG_PPC64
 33#define get_accounting(tsk)	(&get_paca()->accounting)
 34#define raw_get_accounting(tsk)	(&local_paca->accounting)
 35static inline void arch_vtime_task_switch(struct task_struct *tsk) { }
 36
 37#else
 38#define get_accounting(tsk)	(&task_thread_info(tsk)->accounting)
 39#define raw_get_accounting(tsk)	get_accounting(tsk)
 40/*
 41 * Called from the context switch with interrupts disabled, to charge all
 42 * accumulated times to the current process, and to prepare accounting on
 43 * the next process.
 44 */
 45static inline void arch_vtime_task_switch(struct task_struct *prev)
 46{
 47	struct cpu_accounting_data *acct = get_accounting(current);
 48	struct cpu_accounting_data *acct0 = get_accounting(prev);
 49
 50	acct->starttime = acct0->starttime;
 51}
 52#endif
 53
 54/*
 55 * account_cpu_user_entry/exit runs "unreconciled", so can't trace,
 56 * can't use get_paca()
 57 */
 58static notrace inline void account_cpu_user_entry(void)
 59{
 60	unsigned long tb = mftb();
 61	struct cpu_accounting_data *acct = raw_get_accounting(current);
 62
 63	acct->utime += (tb - acct->starttime_user);
 64	acct->starttime = tb;
 65}
 66
 67static notrace inline void account_cpu_user_exit(void)
 68{
 69	unsigned long tb = mftb();
 70	struct cpu_accounting_data *acct = raw_get_accounting(current);
 71
 72	acct->stime += (tb - acct->starttime);
 73	acct->starttime_user = tb;
 74}
 75
 76static notrace inline void account_stolen_time(void)
 77{
 78#ifdef CONFIG_PPC_SPLPAR
 79	if (firmware_has_feature(FW_FEATURE_SPLPAR)) {
 80		struct lppaca *lp = local_paca->lppaca_ptr;
 81
 82		if (unlikely(local_paca->dtl_ridx != be64_to_cpu(lp->dtl_idx)))
 83			pseries_accumulate_stolen_time();
 84	}
 85#endif
 86}
 87
 88#endif /* __KERNEL__ */
 89#else /* CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */
 90static inline void account_cpu_user_entry(void)
 91{
 92}
 93static inline void account_cpu_user_exit(void)
 94{
 95}
 96static notrace inline void account_stolen_time(void)
 97{
 98}
 99#endif /* CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */
100#endif /* __POWERPC_CPUTIME_H */