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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>
This commit is contained in:
Madhavan Srinivasan 2017-07-19 03:06:32 +05:30 committed by Michael Ellerman
parent 7e7dc66adc
commit 28a5db0061
3 changed files with 19 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
arch/powerpc/include/asm/opal-api.h
View File

@ -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 */

5
arch/powerpc/include/asm/opal.h
View File

@ -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);

3
arch/powerpc/platforms/powernv/opal-wrappers.S
View File

@ -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);