From 4dc7a0bbeb6882ad665e588e82fabe5bb4645f2f Mon Sep 17 00:00:00 2001 From: Ingo Molnar Date: Thu, 12 Jan 2006 01:05:27 -0800 Subject: [PATCH] sched: add cacheflush() asm Add per-arch sched_cacheflush() which is a write-back cacheflush used by the migration-cost calibration code at bootup time. Signed-off-by: Ingo Molnar Cc: Nick Piggin Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds diff --git a/arch/ia64/kernel/setup.c b/arch/ia64/kernel/setup.c index c33305d..d91c8ff 100644 --- a/arch/ia64/kernel/setup.c +++ b/arch/ia64/kernel/setup.c @@ -60,6 +60,7 @@ #include #include #include +#include #if defined(CONFIG_SMP) && (IA64_CPU_SIZE > PAGE_SIZE) # error "struct cpuinfo_ia64 too big!" @@ -870,6 +871,15 @@ cpu_init (void) pm_idle = default_idle; } +/* + * On SMP systems, when the scheduler does migration-cost autodetection, + * it needs a way to flush as much of the CPU's caches as possible. + */ +void sched_cacheflush(void) +{ + ia64_sal_cache_flush(3); +} + void check_bugs (void) { diff --git a/include/asm-alpha/system.h b/include/asm-alpha/system.h index 050e86d..766ab86 100644 --- a/include/asm-alpha/system.h +++ b/include/asm-alpha/system.h @@ -140,6 +140,16 @@ extern void halt(void) __attribute__((noreturn)); struct task_struct; extern struct task_struct *alpha_switch_to(unsigned long, struct task_struct*); +/* + * On SMP systems, when the scheduler does migration-cost autodetection, + * it needs a way to flush as much of the CPU's caches as possible. + * + * TODO: fill this in! + */ +static inline void sched_cacheflush(void) +{ +} + #define imb() \ __asm__ __volatile__ ("call_pal %0 #imb" : : "i" (PAL_imb) : "memory") diff --git a/include/asm-arm/system.h b/include/asm-arm/system.h index 5621d61..0497171 100644 --- a/include/asm-arm/system.h +++ b/include/asm-arm/system.h @@ -172,6 +172,16 @@ do { \ } while (0) /* + * On SMP systems, when the scheduler does migration-cost autodetection, + * it needs a way to flush as much of the CPU's caches as possible. + * + * TODO: fill this in! + */ +static inline void sched_cacheflush(void) +{ +} + +/* * CPU interrupt mask handling. */ #if __LINUX_ARM_ARCH__ >= 6 diff --git a/include/asm-arm26/system.h b/include/asm-arm26/system.h index f23fac1..1bce6b3 100644 --- a/include/asm-arm26/system.h +++ b/include/asm-arm26/system.h @@ -115,6 +115,16 @@ do { \ } while (0) /* + * On SMP systems, when the scheduler does migration-cost autodetection, + * it needs a way to flush as much of the CPU's caches as possible. + * + * TODO: fill this in! + */ +static inline void sched_cacheflush(void) +{ +} + +/* * Save the current interrupt enable state & disable IRQs */ #define local_irq_save(x) \ diff --git a/include/asm-i386/system.h b/include/asm-i386/system.h index 9c0593b..36a92ed 100644 --- a/include/asm-i386/system.h +++ b/include/asm-i386/system.h @@ -548,6 +548,15 @@ void enable_hlt(void); extern int es7000_plat; void cpu_idle_wait(void); +/* + * On SMP systems, when the scheduler does migration-cost autodetection, + * it needs a way to flush as much of the CPU's caches as possible: + */ +static inline void sched_cacheflush(void) +{ + wbinvd(); +} + extern unsigned long arch_align_stack(unsigned long sp); #endif diff --git a/include/asm-ia64/system.h b/include/asm-ia64/system.h index 635235f..510c31c 100644 --- a/include/asm-ia64/system.h +++ b/include/asm-ia64/system.h @@ -279,6 +279,7 @@ extern void ia64_load_extra (struct task_struct *task); #define ia64_platform_is(x) (strcmp(x, platform_name) == 0) void cpu_idle_wait(void); +void sched_cacheflush(void); #define arch_align_stack(x) (x) diff --git a/include/asm-m32r/system.h b/include/asm-m32r/system.h index dcf619a..06c12a0 100644 --- a/include/asm-m32r/system.h +++ b/include/asm-m32r/system.h @@ -68,6 +68,16 @@ last = __last; \ } while(0) +/* + * On SMP systems, when the scheduler does migration-cost autodetection, + * it needs a way to flush as much of the CPU's caches as possible. + * + * TODO: fill this in! + */ +static inline void sched_cacheflush(void) +{ +} + /* Interrupt Control */ #if !defined(CONFIG_CHIP_M32102) && !defined(CONFIG_CHIP_M32104) #define local_irq_enable() \ diff --git a/include/asm-mips/system.h b/include/asm-mips/system.h index 330c4e4..5f761ad 100644 --- a/include/asm-mips/system.h +++ b/include/asm-mips/system.h @@ -164,6 +164,16 @@ do { \ __restore_dsp(current); \ } while(0) +/* + * On SMP systems, when the scheduler does migration-cost autodetection, + * it needs a way to flush as much of the CPU's caches as possible. + * + * TODO: fill this in! + */ +static inline void sched_cacheflush(void) +{ +} + static inline unsigned long __xchg_u32(volatile int * m, unsigned int val) { __u32 retval; diff --git a/include/asm-parisc/system.h b/include/asm-parisc/system.h index f3928d3..a5a973c 100644 --- a/include/asm-parisc/system.h +++ b/include/asm-parisc/system.h @@ -49,6 +49,15 @@ extern struct task_struct *_switch_to(struct task_struct *, struct task_struct * (last) = _switch_to(prev, next); \ } while(0) +/* + * On SMP systems, when the scheduler does migration-cost autodetection, + * it needs a way to flush as much of the CPU's caches as possible. + * + * TODO: fill this in! + */ +static inline void sched_cacheflush(void) +{ +} /* interrupt control */ diff --git a/include/asm-powerpc/system.h b/include/asm-powerpc/system.h index 0c58e32..1be629b 100644 --- a/include/asm-powerpc/system.h +++ b/include/asm-powerpc/system.h @@ -175,6 +175,16 @@ struct thread_struct; extern struct task_struct *_switch(struct thread_struct *prev, struct thread_struct *next); +/* + * On SMP systems, when the scheduler does migration-cost autodetection, + * it needs a way to flush as much of the CPU's caches as possible. + * + * TODO: fill this in! + */ +static inline void sched_cacheflush(void) +{ +} + extern unsigned int rtas_data; extern int mem_init_done; /* set on boot once kmalloc can be called */ extern unsigned long memory_limit; diff --git a/include/asm-ppc/system.h b/include/asm-ppc/system.h index bd99cb5..212dca66 100644 --- a/include/asm-ppc/system.h +++ b/include/asm-ppc/system.h @@ -123,6 +123,16 @@ extern struct task_struct *__switch_to(struct task_struct *, struct task_struct *); #define switch_to(prev, next, last) ((last) = __switch_to((prev), (next))) +/* + * On SMP systems, when the scheduler does migration-cost autodetection, + * it needs a way to flush as much of the CPU's caches as possible. + * + * TODO: fill this in! + */ +static inline void sched_cacheflush(void) +{ +} + struct thread_struct; extern struct task_struct *_switch(struct thread_struct *prev, struct thread_struct *next); diff --git a/include/asm-s390/system.h b/include/asm-s390/system.h index 864cae7..c7c3a9a 100644 --- a/include/asm-s390/system.h +++ b/include/asm-s390/system.h @@ -104,6 +104,16 @@ static inline void restore_access_regs(unsigned int *acrs) prev = __switch_to(prev,next); \ } while (0) +/* + * On SMP systems, when the scheduler does migration-cost autodetection, + * it needs a way to flush as much of the CPU's caches as possible. + * + * TODO: fill this in! + */ +static inline void sched_cacheflush(void) +{ +} + #ifdef CONFIG_VIRT_CPU_ACCOUNTING extern void account_user_vtime(struct task_struct *); extern void account_system_vtime(struct task_struct *); diff --git a/include/asm-sh/system.h b/include/asm-sh/system.h index 28a3c2d..bb03304 100644 --- a/include/asm-sh/system.h +++ b/include/asm-sh/system.h @@ -57,6 +57,16 @@ last = __last; \ } while (0) +/* + * On SMP systems, when the scheduler does migration-cost autodetection, + * it needs a way to flush as much of the CPU's caches as possible. + * + * TODO: fill this in! + */ +static inline void sched_cacheflush(void) +{ +} + #define nop() __asm__ __volatile__ ("nop") diff --git a/include/asm-sparc/system.h b/include/asm-sparc/system.h index 1f6b71f..52fe2e4 100644 --- a/include/asm-sparc/system.h +++ b/include/asm-sparc/system.h @@ -166,6 +166,16 @@ extern void fpsave(unsigned long *fpregs, unsigned long *fsr, } while(0) /* + * On SMP systems, when the scheduler does migration-cost autodetection, + * it needs a way to flush as much of the CPU's caches as possible. + * + * TODO: fill this in! + */ +static inline void sched_cacheflush(void) +{ +} + +/* * Changing the IRQ level on the Sparc. */ extern void local_irq_restore(unsigned long); diff --git a/include/asm-sparc64/system.h b/include/asm-sparc64/system.h index 309f146..07d7236 100644 --- a/include/asm-sparc64/system.h +++ b/include/asm-sparc64/system.h @@ -253,6 +253,16 @@ do { if (test_thread_flag(TIF_PERFCTR)) { \ } \ } while(0) +/* + * On SMP systems, when the scheduler does migration-cost autodetection, + * it needs a way to flush as much of the CPU's caches as possible. + * + * TODO: fill this in! + */ +static inline void sched_cacheflush(void) +{ +} + static inline unsigned long xchg32(__volatile__ unsigned int *m, unsigned int val) { unsigned long tmp1, tmp2; diff --git a/include/asm-x86_64/system.h b/include/asm-x86_64/system.h index 38c1e8a..0eacbef 100644 --- a/include/asm-x86_64/system.h +++ b/include/asm-x86_64/system.h @@ -193,6 +193,15 @@ static inline void write_cr4(unsigned long val) #define wbinvd() \ __asm__ __volatile__ ("wbinvd": : :"memory"); +/* + * On SMP systems, when the scheduler does migration-cost autodetection, + * it needs a way to flush as much of the CPU's caches as possible. + */ +static inline void sched_cacheflush(void) +{ + wbinvd(); +} + #endif /* __KERNEL__ */ #define nop() __asm__ __volatile__ ("nop") -- cgit v0.10.2