From 76cb841cb886eef6b3bee341a2266c76578724ad Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 6 May 2024 03:02:30 +0200 Subject: Adding upstream version 4.19.249. Signed-off-by: Daniel Baumann --- arch/powerpc/include/asm/cputime.h | 70 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 70 insertions(+) create mode 100644 arch/powerpc/include/asm/cputime.h (limited to 'arch/powerpc/include/asm/cputime.h') diff --git a/arch/powerpc/include/asm/cputime.h b/arch/powerpc/include/asm/cputime.h new file mode 100644 index 000000000..133672744 --- /dev/null +++ b/arch/powerpc/include/asm/cputime.h @@ -0,0 +1,70 @@ +/* + * Definitions for measuring cputime on powerpc machines. + * + * Copyright (C) 2006 Paul Mackerras, IBM Corp. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + * + * 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 +#include +#include +#include +#include + +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) { } +#else +#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; + acct->startspurr = acct0->startspurr; +} +#endif + +#endif /* __KERNEL__ */ +#endif /* CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */ +#endif /* __POWERPC_CPUTIME_H */ -- cgit v1.2.3