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_hha_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_hha_pmu.c')
| -rw-r--r-- | drivers/perf/hisilicon/hisi_uncore_hha_pmu.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c b/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c index 5eb8168029c0..41b2dceb5f26 100644 --- a/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c +++ b/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c @@ -23,6 +23,7 @@ #define HHA_INT_MASK 0x0804 #define HHA_INT_STATUS 0x0808 #define HHA_INT_CLEAR 0x080C +#define HHA_VERSION 0x1cf0 #define HHA_PERF_CTRL 0x1E00 #define HHA_EVENT_CTRL 0x1E04 #define HHA_EVENT_TYPE0 0x1E80 @@ -261,6 +262,8 @@ static int hisi_hha_pmu_init_data(struct platform_device *pdev, return PTR_ERR(hha_pmu->base); } + hha_pmu->identifier = readl(hha_pmu->base + HHA_VERSION); + return 0; } @@ -320,10 +323,23 @@ static const struct attribute_group hisi_hha_pmu_cpumask_attr_group = { .attrs = hisi_hha_pmu_cpumask_attrs, }; +static struct device_attribute hisi_hha_pmu_identifier_attr = + __ATTR(identifier, 0444, hisi_uncore_pmu_identifier_attr_show, NULL); + +static struct attribute *hisi_hha_pmu_identifier_attrs[] = { + &hisi_hha_pmu_identifier_attr.attr, + NULL +}; + +static struct attribute_group hisi_hha_pmu_identifier_group = { + .attrs = hisi_hha_pmu_identifier_attrs, +}; + static const struct attribute_group *hisi_hha_pmu_attr_groups[] = { &hisi_hha_pmu_format_group, &hisi_hha_pmu_events_group, &hisi_hha_pmu_cpumask_attr_group, + &hisi_hha_pmu_identifier_group, NULL, }; |