ffb20c2e52
In some cases, when probing a perf MSR, we're probing certain bits of the MSR instead of the whole register, thus only these bits should be checked. For example, for RAPL ENERGY_STATUS MSR, only the lower 32 bits represents the energy counter, and the higher 32bits are reserved. Introduce a new mask field in struct perf_msr to allow probing certain bits of a MSR. This change is transparent to the current perf_msr_probe() users. Signed-off-by: Zhang Rui <rui.zhang@intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Andi Kleen <ak@linux.intel.com> Link: https://lkml.kernel.org/r/20210204161816.12649-1-rui.zhang@intel.com
31 lines
710 B
C
31 lines
710 B
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef __ARCH_X86_EVENTS_PROBE_H__
|
|
#define __ARCH_X86_EVENTS_PROBE_H__
|
|
#include <linux/sysfs.h>
|
|
|
|
struct perf_msr {
|
|
u64 msr;
|
|
struct attribute_group *grp;
|
|
bool (*test)(int idx, void *data);
|
|
bool no_check;
|
|
u64 mask;
|
|
};
|
|
|
|
unsigned long
|
|
perf_msr_probe(struct perf_msr *msr, int cnt, bool no_zero, void *data);
|
|
|
|
#define __PMU_EVENT_GROUP(_name) \
|
|
static struct attribute *attrs_##_name[] = { \
|
|
&attr_##_name.attr.attr, \
|
|
NULL, \
|
|
}
|
|
|
|
#define PMU_EVENT_GROUP(_grp, _name) \
|
|
__PMU_EVENT_GROUP(_name); \
|
|
static struct attribute_group group_##_name = { \
|
|
.name = #_grp, \
|
|
.attrs = attrs_##_name, \
|
|
}
|
|
|
|
#endif /* __ARCH_X86_EVENTS_PROBE_H__ */
|