diff options
| author | John Garry <john.garry@huawei.com> | 2020-10-08 17:26:18 +0800 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2020-11-25 15:10:35 +0000 |
| commit | ac4511c9364c9a6390e8585cdd4596103bca16eb (patch) | |
| tree | 288b061966dadaf444755689696905684e4c4620 /drivers/perf/hisilicon/hisi_uncore_pmu.c | |
| parent | 6c8cfbf5db42bc300372d893a140ea0879fb0772 (diff) | |
| download | linux-ac4511c9364c9a6390e8585cdd4596103bca16eb.tar.bz2 | |
drivers/perf: hisi: Add identifier sysfs file
To allow userspace to identify the specific implementation of the device,
add an "identifier" sysfs file.
Encoding is as follows (same for all uncore drivers):
hi1620: 0x0
hi1630: 0x30
Signed-off-by: John Garry <john.garry@huawei.com>
Link: https://lore.kernel.org/r/1602149181-237415-2-git-send-email-john.garry@huawei.com
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'drivers/perf/hisilicon/hisi_uncore_pmu.c')
| -rw-r--r-- | drivers/perf/hisilicon/hisi_uncore_pmu.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/perf/hisilicon/hisi_uncore_pmu.c b/drivers/perf/hisilicon/hisi_uncore_pmu.c index 97aff877a4e7..9dbdc3fc3bb4 100644 --- a/drivers/perf/hisilicon/hisi_uncore_pmu.c +++ b/drivers/perf/hisilicon/hisi_uncore_pmu.c @@ -119,6 +119,16 @@ int hisi_uncore_pmu_get_event_idx(struct perf_event *event) } EXPORT_SYMBOL_GPL(hisi_uncore_pmu_get_event_idx); +ssize_t hisi_uncore_pmu_identifier_attr_show(struct device *dev, + struct device_attribute *attr, + char *page) +{ + struct hisi_pmu *hisi_pmu = to_hisi_pmu(dev_get_drvdata(dev)); + + return snprintf(page, PAGE_SIZE, "0x%08x\n", hisi_pmu->identifier); +} +EXPORT_SYMBOL_GPL(hisi_uncore_pmu_identifier_attr_show); + static void hisi_uncore_pmu_clear_event_idx(struct hisi_pmu *hisi_pmu, int idx) { if (!hisi_uncore_pmu_counter_valid(hisi_pmu, idx)) { |