hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

csky: Fix perf record in kernel/user space 

csky_pmu_event_init is called several times during the perf record
initialzation. After configure the event counter in either kernel
space or user space, csky_pmu_event_init is called twice with no
attr specified. Configuration will be overwritten with sampling in
both kernel space and user space. --all-kernel/--all-user is
useless without this patch applied.

Signed-off-by: Mao Han <han_mao@c-sky.com>
Signed-off-by: Guo Ren <guoren@kernel.org>
This commit is contained in:
Mao Han 2019-06-04 18:54:49 +08:00 committed by Guo Ren
parent f622fbf205
commit d41435d9b2
1 changed files with 25 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

48
arch/csky/kernel/perf_event.c
View File

@ -922,6 +922,30 @@ static int csky_pmu_event_init(struct perf_event *event)
struct hw_perf_event *hwc = &event->hw;
int ret;
switch (event->attr.type) {
case PERF_TYPE_HARDWARE:
if (event->attr.config >= PERF_COUNT_HW_MAX)
return -ENOENT;
ret = csky_pmu_hw_map[event->attr.config];
if (ret == HW_OP_UNSUPPORTED)
return -ENOENT;
hwc->idx = ret;
break;
case PERF_TYPE_HW_CACHE:
ret = csky_pmu_cache_event(event->attr.config);
if (ret == CACHE_OP_UNSUPPORTED)
return -ENOENT;
hwc->idx = ret;
break;
case PERF_TYPE_RAW:
if (hw_raw_read_mapping[event->attr.config] == NULL)
return -ENOENT;
hwc->idx = event->attr.config;
break;
default:
return -ENOENT;
}
if (event->attr.exclude_user)
csky_pmu.hpcr = BIT(2);
else if (event->attr.exclude_kernel)
@ -931,29 +955,7 @@ static int csky_pmu_event_init(struct perf_event *event)
csky_pmu.hpcr |= BIT(1) | BIT(0);
switch (event->attr.type) {
case PERF_TYPE_HARDWARE:
if (event->attr.config >= PERF_COUNT_HW_MAX)
return -ENOENT;
ret = csky_pmu_hw_map[event->attr.config];
if (ret == HW_OP_UNSUPPORTED)
return -ENOENT;
hwc->idx = ret;
return 0;
case PERF_TYPE_HW_CACHE:
ret = csky_pmu_cache_event(event->attr.config);
if (ret == CACHE_OP_UNSUPPORTED)
return -ENOENT;
hwc->idx = ret;
return 0;
case PERF_TYPE_RAW:
if (hw_raw_read_mapping[event->attr.config] == NULL)
return -ENOENT;
hwc->idx = event->attr.config;
return 0;
default:
return -ENOENT;
}
return 0;
}
/* starts all counters */