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Commit 28a5db00 authored by Madhavan Srinivasan's avatar Madhavan Srinivasan Committed by Michael Ellerman
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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: default avatarHemant Kumar <hemant@linux.vnet.ibm.com>
Signed-off-by: default avatarAnju T Sudhakar <anju@linux.vnet.ibm.com>
Signed-off-by: default avatarMadhavan Srinivasan <maddy@linux.vnet.ibm.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent 7e7dc66a

arch/powerpc/include/asm/opal-api.h

+11 −1
Original line number Diff line number Diff line
@@ -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 */

arch/powerpc/include/asm/opal.h

+5 −0
Original line number Diff line number Diff line
@@ -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);

arch/powerpc/platforms/powernv/opal-wrappers.S

+3 −0
Original line number Diff line number Diff line
@@ -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);