diff options
| author | Madhavan Srinivasan <maddy@linux.vnet.ibm.com> | 2017-07-19 03:06:32 +0530 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2017-07-24 23:00:22 +1000 |
| commit | 28a5db0061014c8afbbb98560cf420c29bc4d8e1 (patch) | |
| tree | c64d4825954a9a0e0696f25dbace9fd4f4fd051d /arch | |
| parent | 7e7dc66adcf490a619bc3c7763a8cebadfba73e3 (diff) | |
| download | linux-28a5db0061014c8afbbb98560cf420c29bc4d8e1.tar.bz2 | |
powerpc/powernv: Add IMC OPAL APIs
In-Memory Collection (IMC) counters are performance monitoring
infrastructure. These counters need special sequence of SCOMs to
init/start/stop which is handled by OPAL. And OPAL provides three APIs
to init and control these IMC engines.
OPAL API documentation:
https://github.com/open-power/skiboot/blob/master/doc/opal-api/opal-imc-counters.rst
Patch updates the kernel side powernv platform code to support the new
OPAL APIs
Signed-off-by: Hemant Kumar <hemant@linux.vnet.ibm.com>
Signed-off-by: Anju T Sudhakar <anju@linux.vnet.ibm.com>
Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/include/asm/opal-api.h | 12 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/opal.h | 5 | ||||
| -rw-r--r-- | arch/powerpc/platforms/powernv/opal-wrappers.S | 3 |
3 files changed, 19 insertions, 1 deletions
diff --git a/arch/powerpc/include/asm/opal-api.h b/arch/powerpc/include/asm/opal-api.h index 3130a73652c7..7df005965634 100644 --- a/arch/powerpc/include/asm/opal-api.h +++ b/arch/powerpc/include/asm/opal-api.h @@ -190,7 +190,10 @@ #define OPAL_NPU_INIT_CONTEXT 146 #define OPAL_NPU_DESTROY_CONTEXT 147 #define OPAL_NPU_MAP_LPAR 148 -#define OPAL_LAST 148 +#define OPAL_IMC_COUNTERS_INIT 149 +#define OPAL_IMC_COUNTERS_START 150 +#define OPAL_IMC_COUNTERS_STOP 151 +#define OPAL_LAST 151 /* Device tree flags */ @@ -1084,6 +1087,13 @@ enum { XIVE_DUMP_EMU_STATE = 5, }; +/* "type" argument options for OPAL_IMC_COUNTERS_* calls */ +enum { + OPAL_IMC_COUNTERS_NEST = 1, + OPAL_IMC_COUNTERS_CORE = 2, +}; + + #endif /* __ASSEMBLY__ */ #endif /* __OPAL_API_H */ diff --git a/arch/powerpc/include/asm/opal.h b/arch/powerpc/include/asm/opal.h index 588fb1c23af9..6b8513c3ad40 100644 --- a/arch/powerpc/include/asm/opal.h +++ b/arch/powerpc/include/asm/opal.h @@ -268,6 +268,11 @@ int64_t opal_xive_free_irq(uint32_t girq); int64_t opal_xive_sync(uint32_t type, uint32_t id); int64_t opal_xive_dump(uint32_t type, uint32_t id); +int64_t opal_imc_counters_init(uint32_t type, uint64_t address, + uint64_t cpu_pir); +int64_t opal_imc_counters_start(uint32_t type, uint64_t cpu_pir); +int64_t opal_imc_counters_stop(uint32_t type, uint64_t cpu_pir); + /* Internal functions */ extern int early_init_dt_scan_opal(unsigned long node, const char *uname, int depth, void *data); diff --git a/arch/powerpc/platforms/powernv/opal-wrappers.S b/arch/powerpc/platforms/powernv/opal-wrappers.S index 4ca6c26a56d5..b77f52ee8263 100644 --- a/arch/powerpc/platforms/powernv/opal-wrappers.S +++ b/arch/powerpc/platforms/powernv/opal-wrappers.S @@ -310,3 +310,6 @@ OPAL_CALL(opal_xive_dump, OPAL_XIVE_DUMP); OPAL_CALL(opal_npu_init_context, OPAL_NPU_INIT_CONTEXT); OPAL_CALL(opal_npu_destroy_context, OPAL_NPU_DESTROY_CONTEXT); OPAL_CALL(opal_npu_map_lpar, OPAL_NPU_MAP_LPAR); +OPAL_CALL(opal_imc_counters_init, OPAL_IMC_COUNTERS_INIT); +OPAL_CALL(opal_imc_counters_start, OPAL_IMC_COUNTERS_START); +OPAL_CALL(opal_imc_counters_stop, OPAL_IMC_COUNTERS_STOP); |