diff options
| author | Atish Patra <atish.patra@wdc.com> | 2021-07-10 09:18:10 -0700 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2021-07-11 10:21:38 +0530 |
| commit | e7cc7a3ab2770b9f40569a84c417afdad59531bc (patch) | |
| tree | 4f481c5ba869ac53fcd256d0d3fae4863cfd7b3e /include | |
| parent | 49966db30658a3d5070e1a10200bd8c73dab0851 (diff) | |
lib: sbi: Add PMU specific platform hooks
A platform hook to initialize PMU allows platform vendors to provide
their own mechanism to define pmu event-counter mappings in addition
to the DT based approach.
Another platform hook that allows platform vendors customize the
final mhpmevent value configuration.
Reviewed-by: Anup Patel <anup.patel@wdc.com>
Signed-off-by: Atish Patra <atish.patra@wdc.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/sbi/sbi_platform.h | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/include/sbi/sbi_platform.h b/include/sbi/sbi_platform.h index f8074d2..4d192f2 100644 --- a/include/sbi/sbi_platform.h +++ b/include/sbi/sbi_platform.h @@ -89,6 +89,12 @@ struct sbi_platform_operations { /** Initialize (or populate) domains for the platform */ int (*domains_init)(void); + /** Initialize hw performance counters */ + int (*pmu_init)(void); + + /** Get platform specific mhpmevent value */ + uint64_t (*pmu_xlate_to_mhpmevent)(uint32_t event_idx, uint64_t data); + /** Initialize the platform console */ int (*console_init)(void); @@ -392,6 +398,39 @@ static inline int sbi_platform_domains_init(const struct sbi_platform *plat) } /** + * Setup hw PMU events for the platform + * + * @param plat pointer to struct sbi_platform + * + * @return 0 on success and negative error code on failure + */ +static inline int sbi_platform_pmu_init(const struct sbi_platform *plat) +{ + if (plat && sbi_platform_ops(plat)->pmu_init) + return sbi_platform_ops(plat)->pmu_init(); + return 0; +} + +/** + * Get the value to be written in mhpmeventx for event_idx + * + * @param plat pointer to struct sbi_platform + * @param event_idx ID of the PMU event + * @param data Additional configuration data passed from supervisor software + * + * @return expected value by the platform or 0 if platform doesn't know about + * the event + */ +static inline uint64_t sbi_platform_pmu_xlate_to_mhpmevent(const struct sbi_platform *plat, + uint32_t event_idx, uint64_t data) +{ + if (plat && sbi_platform_ops(plat)->pmu_xlate_to_mhpmevent) + return sbi_platform_ops(plat)->pmu_xlate_to_mhpmevent(event_idx, + data); + return 0; +} + +/** * Initialize the platform console * * @param plat pointer to struct sbi_platform |