From 28a5db0061014c8afbbb98560cf420c29bc4d8e1 Mon Sep 17 00:00:00 2001
From: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Date: Wed, 19 Jul 2017 03:06:32 +0530
Subject: [PATCH] powerpc/powernv: Add IMC OPAL APIs
Git-repo: https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git
References: bsc1054914, fate#322448
Patch-mainline: queued
Git-commit: 28a5db0061014c8afbbb98560cf420c29bc4d8e1
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>
Acked-by: Michal Suchanek <msuchanek@suse.de>
---
arch/powerpc/include/asm/opal-api.h | 12 +++++++++++-
arch/powerpc/include/asm/opal.h | 5 +++++
arch/powerpc/platforms/powernv/opal-wrappers.S | 3 +++
3 files changed, 19 insertions(+), 1 deletion(-)
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);
--
2.10.2