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:/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 <[email protected]> Signed-off-by: Anju T Sudhakar <[email protected]> Signed-off-by: Madhavan Srinivasan <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
ammarfaizi2 · Jul 24, 2017 · 28a5db0 · 28a5db0
1 parent 7e7dc66
commit 28a5db0
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Showing 3 changed files with 19 additions and 1 deletion.
diff --git 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
@@ -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
@@ -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);