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perf counters: clean up 'raw' type API

Browse source 
Impact: cleanup

Introduce a separate hw_event type.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Thomas Gleixner 2008-12-08 19:26:59 +01:00 • committed by Ingo Molnar
commit eab656ae04
3 changed files with 18 additions and 12 deletions
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7
include/linux/perf_counter.h
View file

@ -38,6 +38,7 @@ enum hw_event_types {
* If this bit is set in the type, then trigger NMI sampling:
*/
PERF_COUNT_NMI = (1 << 30),
PERF_COUNT_RAW = (1 << 31),
};
/*
@ -49,6 +50,12 @@ enum perf_record_type {
PERF_RECORD_GROUP,
};
struct perf_counter_event {
u32 hw_event_type;
u32 hw_event_period;
u64 hw_raw_ctrl;
};
/**
* struct hw_perf_counter - performance counter hardware details
*/

8
include/linux/syscalls.h
View file

@ -54,6 +54,7 @@ struct compat_stat;
struct compat_timeval;
struct robust_list_head;
struct getcpu_cache;
struct perf_counter_event;
#include <linux/types.h>
#include <linux/aio_abi.h>
@ -625,9 +626,6 @@ asmlinkage long sys_fallocate(int fd, int mode, loff_t offset, loff_t len);
int kernel_execve(const char *filename, char *const argv[], char *const envp[]);
asmlinkage int
sys_perf_counter_open(u32 hw_event_type,
u32 hw_event_period,
u32 record_type,
pid_t pid,
int cpu);
sys_perf_counter_open(struct perf_counter_event __user *uevent, u32 record_type,
pid_t pid, int cpu, int masterfd);
#endif

15
kernel/perf_counter.c
View file

@ -734,26 +734,27 @@ perf_counter_alloc(u32 hw_event_period, int cpu, u32 record_type)
* @pid: target pid
*/
asmlinkage int
sys_perf_counter_open(u32 hw_event_type,
u32 hw_event_period,
u32 record_type,
pid_t pid,
int cpu)
sys_perf_counter_open(struct perf_counter_event __user *uevent, u32 record_type,
pid_t pid, int cpu, int masterfd)
{
struct perf_counter_context *ctx;
struct perf_counter_event event;
struct perf_counter *counter;
int ret;
if (copy_from_user(&event, uevent, sizeof(event)) != 0)
return -EFAULT;
ctx = find_get_context(pid, cpu);
if (IS_ERR(ctx))
return PTR_ERR(ctx);
ret = -ENOMEM;
counter = perf_counter_alloc(hw_event_period, cpu, record_type);
counter = perf_counter_alloc(event.hw_event_period, cpu, record_type);
if (!counter)
goto err_put_context;
ret = hw_perf_counter_init(counter, hw_event_type);
ret = hw_perf_counter_init(counter, event.hw_event_type);
if (ret)
goto err_free_put_context;