From a1ecf7f6e65637ba4470405ad39794710dbf85d4 Mon Sep 17 00:00:00 2001 From: Tony Luck Date: Wed, 18 May 2005 16:06:00 -0700 Subject: [IA64] alternate perfmon handler Patch from Charles Spirakis Some linux customers want to optimize their applications on the latest hardware but are not yet willing to upgrade to the latest kernel. This patch provides a way to plug in an alternate, basic, and GPL'ed PMU subsystem to help with their monitoring needs or for specialty work. It can also be used in case of serious unexpected bugs in perfmon. Mutual exclusion between the two subsystems is guaranteed, hence no conflict can arise from both subsystem being present. Acked-by: Stephane Eranian Signed-off-by: Tony Luck --- include/asm-ia64/perfmon.h | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'include/asm-ia64') diff --git a/include/asm-ia64/perfmon.h b/include/asm-ia64/perfmon.h index ed5416c5b1ac..7f3333dd00e4 100644 --- a/include/asm-ia64/perfmon.h +++ b/include/asm-ia64/perfmon.h @@ -177,6 +177,10 @@ typedef union { extern long perfmonctl(int fd, int cmd, void *arg, int narg); +typedef struct { + void (*handler)(int irq, void *arg, struct pt_regs *regs); +} pfm_intr_handler_desc_t; + extern void pfm_save_regs (struct task_struct *); extern void pfm_load_regs (struct task_struct *); @@ -187,6 +191,10 @@ extern void pfm_syst_wide_update_task(struct task_struct *, unsigned long info, extern void pfm_inherit(struct task_struct *task, struct pt_regs *regs); extern void pfm_init_percpu(void); extern void pfm_handle_work(void); +extern int pfm_install_alt_pmu_interrupt(pfm_intr_handler_desc_t *h); +extern int pfm_remove_alt_pmu_interrupt(pfm_intr_handler_desc_t *h); + + /* * Reset PMD register flags -- cgit v1.2.2