[RFC 07/11] perf hazard: Functions to convert generic hazard data to arch specific string

[Ravi Bangoria <ravi.bangoria@linux.ibm.com>]

From: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>

Kernel provides pipeline hazard data in struct perf_pipeline_haz_data
format. Add code to convert this data into meaningful string which can
be shown in perf report (followup patch).

Introduce tools/perf/utils/hazard directory which will contains arch
specific directories. Under arch specific directory, add arch specific
logic that will be called by generic code. This directory structure is
introduced to enable cross-arch reporting.

Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
---
 tools/perf/util/Build                         |   2 +
 tools/perf/util/hazard.c                      |  51 +++++++
 tools/perf/util/hazard.h                      |  14 ++
 tools/perf/util/hazard/Build                  |   1 +
 .../util/hazard/powerpc/perf_pipeline_haz.h   |  80 ++++++++++
 .../perf/util/hazard/powerpc/powerpc_hazard.c | 142 ++++++++++++++++++
 .../perf/util/hazard/powerpc/powerpc_hazard.h |  14 ++
 7 files changed, 304 insertions(+)
 create mode 100644 tools/perf/util/hazard.c
 create mode 100644 tools/perf/util/hazard.h
 create mode 100644 tools/perf/util/hazard/Build
 create mode 100644 tools/perf/util/hazard/powerpc/perf_pipeline_haz.h
 create mode 100644 tools/perf/util/hazard/powerpc/powerpc_hazard.c
 create mode 100644 tools/perf/util/hazard/powerpc/powerpc_hazard.h

diff --git a/tools/perf/util/Build b/tools/perf/util/Build
index 07da6c790b63..f5e1b7d79b6d 100644
--- a/tools/perf/util/Build
+++ b/tools/perf/util/Build
@@ -118,6 +118,7 @@ perf-y += parse-regs-options.o
 perf-y += term.o
 perf-y += help-unknown-cmd.o
 perf-y += mem-events.o
+perf-y += hazard.o
 perf-y += vsprintf.o
 perf-y += units.o
 perf-y += time-utils.o
@@ -153,6 +154,7 @@ perf-$(CONFIG_LIBUNWIND_AARCH64)  += libunwind/arm64.o
 perf-$(CONFIG_LIBBABELTRACE) += data-convert-bt.o
 
 perf-y += scripting-engines/
+perf-y += hazard/
 
 perf-$(CONFIG_ZLIB) += zlib.o
 perf-$(CONFIG_LZMA) += lzma.o
diff --git a/tools/perf/util/hazard.c b/tools/perf/util/hazard.c
new file mode 100644
index 000000000000..db235b26b266
--- /dev/null
+++ b/tools/perf/util/hazard.c
@@ -0,0 +1,51 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <string.h>
+#include "hazard/powerpc/powerpc_hazard.h"
+
+const char *perf_haz__itype_str(u8 itype, const char *arch)
+{
+	if (!strncmp(arch, "powerpc", strlen("powerpc")))
+		return powerpc__haz__itype_str(itype);
+
+	return "-";
+}
+
+const char *perf_haz__icache_str(u8 icache, const char *arch)
+{
+	if (!strncmp(arch, "powerpc", strlen("powerpc")))
+		return powerpc__haz__icache_str(icache);
+
+	return "-";
+}
+
+const char *perf_haz__hstage_str(u8 hstage, const char *arch)
+{
+	if (!strncmp(arch, "powerpc", strlen("powerpc")))
+		return powerpc__haz__hstage_str(hstage);
+
+	return "-";
+}
+
+const char *perf_haz__hreason_str(u8 hstage, u8 hreason, const char *arch)
+{
+	if (!strncmp(arch, "powerpc", strlen("powerpc")))
+		return powerpc__haz__hreason_str(hstage, hreason);
+
+	return "-";
+}
+
+const char *perf_haz__sstage_str(u8 sstage, const char *arch)
+{
+	if (!strncmp(arch, "powerpc", strlen("powerpc")))
+		return powerpc__haz__sstage_str(sstage);
+
+	return "-";
+}
+
+const char *perf_haz__sreason_str(u8 sstage, u8 sreason, const char *arch)
+{
+	if (!strncmp(arch, "powerpc", strlen("powerpc")))
+		return powerpc__haz__sreason_str(sstage, sreason);
+
+	return "-";
+}
diff --git a/tools/perf/util/hazard.h b/tools/perf/util/hazard.h
new file mode 100644
index 000000000000..eab4190e056a
--- /dev/null
+++ b/tools/perf/util/hazard.h
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __PERF_HAZARD_H
+#define __PERF_HAZARD_H
+
+#include "sort.h"
+
+const char *perf_haz__itype_str(u8 itype, const char *arch);
+const char *perf_haz__icache_str(u8 icache, const char *arch);
+const char *perf_haz__hstage_str(u8 hstage, const char *arch);
+const char *perf_haz__hreason_str(u8 hstage, u8 hreason, const char *arch);
+const char *perf_haz__sstage_str(u8 sstage, const char *arch);
+const char *perf_haz__sreason_str(u8 sstage, u8 sreason, const char *arch);
+
+#endif /* __PERF_HAZARD_H */
diff --git a/tools/perf/util/hazard/Build b/tools/perf/util/hazard/Build
new file mode 100644
index 000000000000..314c5e316383
--- /dev/null
+++ b/tools/perf/util/hazard/Build
@@ -0,0 +1 @@
+perf-y += powerpc/powerpc_hazard.o
diff --git a/tools/perf/util/hazard/powerpc/perf_pipeline_haz.h b/tools/perf/util/hazard/powerpc/perf_pipeline_haz.h
new file mode 100644
index 000000000000..de8857ec31dd
--- /dev/null
+++ b/tools/perf/util/hazard/powerpc/perf_pipeline_haz.h
@@ -0,0 +1,80 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef _UAPI_ASM_POWERPC_PERF_PIPELINE_HAZ_H
+#define _UAPI_ASM_POWERPC_PERF_PIPELINE_HAZ_H
+
+enum perf_inst_type {
+	PERF_HAZ__ITYPE_LOAD = 1,
+	PERF_HAZ__ITYPE_STORE,
+	PERF_HAZ__ITYPE_BRANCH,
+	PERF_HAZ__ITYPE_FP,
+	PERF_HAZ__ITYPE_FX,
+	PERF_HAZ__ITYPE_CR_OR_SC,
+};
+
+enum perf_inst_cache {
+	PERF_HAZ__ICACHE_L1_HIT = 1,
+	PERF_HAZ__ICACHE_L2_HIT,
+	PERF_HAZ__ICACHE_L3_HIT,
+	PERF_HAZ__ICACHE_L3_MISS,
+};
+
+enum perf_pipeline_stage {
+	PERF_HAZ__PIPE_STAGE_IFU = 1,
+	PERF_HAZ__PIPE_STAGE_IDU,
+	PERF_HAZ__PIPE_STAGE_ISU,
+	PERF_HAZ__PIPE_STAGE_LSU,
+	PERF_HAZ__PIPE_STAGE_BRU,
+	PERF_HAZ__PIPE_STAGE_FXU,
+	PERF_HAZ__PIPE_STAGE_FPU,
+	PERF_HAZ__PIPE_STAGE_VSU,
+	PERF_HAZ__PIPE_STAGE_OTHER,
+};
+
+enum perf_haz_bru_reason {
+	PERF_HAZ__HAZ_BRU_MPRED_DIR = 1,
+	PERF_HAZ__HAZ_BRU_MPRED_TA,
+};
+
+enum perf_haz_isu_reason {
+	PERF_HAZ__HAZ_ISU_SRC = 1,
+	PERF_HAZ__HAZ_ISU_COL = 1,
+};
+
+enum perf_haz_lsu_reason {
+	PERF_HAZ__HAZ_LSU_ERAT_MISS = 1,
+	PERF_HAZ__HAZ_LSU_LMQ,
+	PERF_HAZ__HAZ_LSU_LHS,
+	PERF_HAZ__HAZ_LSU_MPRED,
+	PERF_HAZ__HAZ_DERAT_MISS,
+	PERF_HAZ__HAZ_LSU_LMQ_DERAT_MISS,
+	PERF_HAZ__HAZ_LSU_LHS_DERAT_MISS,
+	PERF_HAZ__HAZ_LSU_MPRED_DERAT_MISS,
+};
+
+enum perf_stall_lsu_reason {
+	PERF_HAZ__STALL_LSU_DCACHE_MISS = 1,
+	PERF_HAZ__STALL_LSU_LD_FIN,
+	PERF_HAZ__STALL_LSU_ST_FWD,
+	PERF_HAZ__STALL_LSU_ST,
+};
+
+enum perf_stall_fxu_reason {
+	PERF_HAZ__STALL_FXU_MC = 1,
+	PERF_HAZ__STALL_FXU_FC,
+};
+
+enum perf_stall_bru_reason {
+	PERF_HAZ__STALL_BRU_FIN_MPRED = 1,
+	PERF_HAZ__STALL_BRU_FC,
+};
+
+enum perf_stall_vsu_reason {
+	PERF_HAZ__STALL_VSU_MC = 1,
+	PERF_HAZ__STALL_VSU_FC,
+};
+
+enum perf_stall_other_reason {
+	PERF_HAZ__STALL_NTC,
+};
+
+#endif /* _UAPI_ASM_POWERPC_PERF_PIPELINE_HAZ_H */
diff --git a/tools/perf/util/hazard/powerpc/powerpc_hazard.c b/tools/perf/util/hazard/powerpc/powerpc_hazard.c
new file mode 100644
index 000000000000..dcb95b769367
--- /dev/null
+++ b/tools/perf/util/hazard/powerpc/powerpc_hazard.c
@@ -0,0 +1,142 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <stddef.h>
+#include "hazard.h"
+#include "powerpc_hazard.h"
+#include "perf_pipeline_haz.h"
+
+static const char *haz_inst_type[] = {
+	"-",
+	"Load",
+	"Store",
+	"Branch",
+	"Floating Point",
+	"Fixed point",
+	"Condition Register/System Call",
+};
+
+const char *powerpc__haz__itype_str(u8 itype)
+{
+	return haz_inst_type[itype];
+}
+
+static const char *haz_inst_cache[] = {
+	"-",
+	"L1 hit",
+	"L2 hit",
+	"L3 hit",
+	"L3 Miss"
+};
+
+const char *powerpc__haz__icache_str(u8 icache)
+{
+	return haz_inst_cache[icache];
+}
+
+static const char *pipeline_stages[] = {
+	"-",
+	"IFU",
+	"IDU",
+	"ISU",
+	"LSU",
+	"BRU",
+	"FXU",
+	"FPU",
+	"VSU",
+};
+
+const char *powerpc__haz__hstage_str(u8 hstage)
+{
+	return pipeline_stages[hstage];
+}
+
+static const char *haz_bru_reason[] = {
+	"-",
+	"Direction",
+	"Target Address",
+};
+
+static const char *haz_isu_reason[] = {
+	"-",
+	"Source Unavailable",
+	"Resource Collision",
+};
+
+static const char *haz_lsu_reason[] = {
+	"-",
+	"ERAT Miss",
+	"LMQ Full",
+	"Load Hit Store",
+	"Mispredict",
+	"DERAT Miss",
+	"LMQ Full, DERAT Miss",
+	"Load Hit Store, DERAT Miss",
+	"Mispredict, DERAT Miss",
+};
+
+const char *powerpc__haz__hreason_str(u8 hstage, u8 hreason)
+{
+	switch (hstage) {
+	case PERF_HAZ__PIPE_STAGE_BRU:
+		return haz_bru_reason[hreason];
+	case PERF_HAZ__PIPE_STAGE_LSU:
+		return haz_lsu_reason[hreason];
+	case PERF_HAZ__PIPE_STAGE_ISU:
+		return haz_isu_reason[hreason];
+	default:
+		return "-";
+	}
+}
+
+const char *powerpc__haz__sstage_str(u8 sstage)
+{
+	return pipeline_stages[sstage];
+}
+
+static const char *stall_lsu_reason[] = {
+	"-",
+	"Dcache_miss",
+	"Load fin",
+	"Store fwd",
+	"Store",
+};
+
+static const char *stall_fxu_reason[] = {
+	"-",
+	"Multi cycle",
+	"Fixed cycle",
+};
+
+static const char *stall_bru_reason[] = {
+	"-",
+	"Finish Mispredict",
+	"Fixed cycle",
+};
+
+static const char *stall_vsu_reason[] = {
+	"-",
+	"Multi cycle",
+	"Fixed cycle",
+};
+
+static const char *stall_other_reason[] = {
+	"-",
+	"Marked fin before NTC",
+};
+
+const char *powerpc__haz__sreason_str(u8 sstage, u8 sreason)
+{
+	switch (sstage) {
+	case PERF_HAZ__PIPE_STAGE_LSU:
+		return stall_lsu_reason[sreason];
+	case PERF_HAZ__PIPE_STAGE_FXU:
+		return stall_fxu_reason[sreason];
+	case PERF_HAZ__PIPE_STAGE_BRU:
+		return stall_bru_reason[sreason];
+	case PERF_HAZ__PIPE_STAGE_VSU:
+		return stall_vsu_reason[sreason];
+	case PERF_HAZ__PIPE_STAGE_OTHER:
+		return stall_other_reason[sreason];
+	default:
+		return "-";
+	}
+}
diff --git a/tools/perf/util/hazard/powerpc/powerpc_hazard.h b/tools/perf/util/hazard/powerpc/powerpc_hazard.h
new file mode 100644
index 000000000000..f13f8f3cd10d
--- /dev/null
+++ b/tools/perf/util/hazard/powerpc/powerpc_hazard.h
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __PERF_POWERPC_HAZARD_H
+#define __PERF_POWERPC_HAZARD_H
+
+#include "hazard.h"
+
+const char *powerpc__haz__itype_str(u8 itype);
+const char *powerpc__haz__icache_str(u8 icache);
+const char *powerpc__haz__hstage_str(u8 hstage);
+const char *powerpc__haz__hreason_str(u8 hstage, u8 hreason);
+const char *powerpc__haz__sstage_str(u8 sstage);
+const char *powerpc__haz__sreason_str(u8 sstage, u8 sreason);
+
+#endif /* __PERF_POWERPC_HAZARD_H */
-- 
2.21.1