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authorTony Luck <tony.luck@intel.com>2005-05-18 19:06:00 -0400
committerTony Luck <tony.luck@intel.com>2005-05-18 19:14:30 -0400
commita1ecf7f6e65637ba4470405ad39794710dbf85d4 (patch)
treea086e2ba8bf56c398c6d50a47d91af6d977aaf63 /include
parent6872ec548970e9fb3ccd61013f84f9bb8b30fa9a (diff)
[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 <eranian@hpl.hp.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'include')
-rw-r--r--include/asm-ia64/perfmon.h8
1 files changed, 8 insertions, 0 deletions
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 {
177 177
178extern long perfmonctl(int fd, int cmd, void *arg, int narg); 178extern long perfmonctl(int fd, int cmd, void *arg, int narg);
179 179
180typedef struct {
181 void (*handler)(int irq, void *arg, struct pt_regs *regs);
182} pfm_intr_handler_desc_t;
183
180extern void pfm_save_regs (struct task_struct *); 184extern void pfm_save_regs (struct task_struct *);
181extern void pfm_load_regs (struct task_struct *); 185extern void pfm_load_regs (struct task_struct *);
182 186
@@ -187,6 +191,10 @@ extern void pfm_syst_wide_update_task(struct task_struct *, unsigned long info,
187extern void pfm_inherit(struct task_struct *task, struct pt_regs *regs); 191extern void pfm_inherit(struct task_struct *task, struct pt_regs *regs);
188extern void pfm_init_percpu(void); 192extern void pfm_init_percpu(void);
189extern void pfm_handle_work(void); 193extern void pfm_handle_work(void);
194extern int pfm_install_alt_pmu_interrupt(pfm_intr_handler_desc_t *h);
195extern int pfm_remove_alt_pmu_interrupt(pfm_intr_handler_desc_t *h);
196
197
190 198
191/* 199/*
192 * Reset PMD register flags 200 * Reset PMD register flags