linux-kernel - [PATCH] perf/x86/ibs: Set data_src.mem_lvl

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Date:   Fri, 10 Mar 2023 16:06:42 -0800
From:   Namhyung Kim <namhyung@...nel.org>
To:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...nel.org>
Cc:     Ravi Bangoria <ravi.bangoria@....com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Stephane Eranian <eranian@...gle.com>,
        Kan Liang <kan.liang@...ux.intel.com>,
        LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH] perf/x86/ibs: Set data_src.mem_lvl_num as well

The IBS PMU driver sets data source of memory operations but it missed
mem_lvl_num field.  So I'm adding them here.

Most cases are straight-forward but please check if MEM_LVLNUM_ANY_CACHE
for peer cache hits is ok.  Also I wonder we can add MEM_REMOTE_REMOTE
for peer cache hits in a far CCX.

Signed-off-by: Namhyung Kim <namhyung@...nel.org>
---
 arch/x86/events/amd/ibs.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/arch/x86/events/amd/ibs.c b/arch/x86/events/amd/ibs.c
index 64582954b5f6..819869fc2dc7 100644
--- a/arch/x86/events/amd/ibs.c
+++ b/arch/x86/events/amd/ibs.c
@@ -724,6 +724,7 @@ static void perf_ibs_get_mem_lvl(union ibs_op_data2 *op_data2,
 	/* L1 Hit */
 	if (op_data3->dc_miss == 0) {
 		data_src->mem_lvl = PERF_MEM_LVL_L1 | PERF_MEM_LVL_HIT;
+		data_src->mem_lvl_num = PERF_MEM_LVLNUM_L1;
 		return;
 	}
 
@@ -733,6 +734,7 @@ static void perf_ibs_get_mem_lvl(union ibs_op_data2 *op_data2,
 		if (boot_cpu_data.x86 != 0x19 || boot_cpu_data.x86_model > 0xF ||
 		    !(op_data3->sw_pf || op_data3->dc_miss_no_mab_alloc)) {
 			data_src->mem_lvl = PERF_MEM_LVL_L2 | PERF_MEM_LVL_HIT;
+			data_src->mem_lvl_num = PERF_MEM_LVLNUM_L2;
 			return;
 		}
 	}
@@ -748,12 +750,14 @@ static void perf_ibs_get_mem_lvl(union ibs_op_data2 *op_data2,
 	if (ibs_caps & IBS_CAPS_ZEN4) {
 		if (ibs_data_src == IBS_DATA_SRC_EXT_LOC_CACHE) {
 			data_src->mem_lvl = PERF_MEM_LVL_L3 | PERF_MEM_LVL_HIT;
+			data_src->mem_lvl_num = PERF_MEM_LVLNUM_L3;
 			return;
 		}
 	} else {
 		if (ibs_data_src == IBS_DATA_SRC_LOC_CACHE) {
 			data_src->mem_lvl = PERF_MEM_LVL_L3 | PERF_MEM_LVL_REM_CCE1 |
 					    PERF_MEM_LVL_HIT;
+			data_src->mem_lvl_num = PERF_MEM_LVLNUM_L3;
 			return;
 		}
 	}
@@ -762,6 +766,7 @@ static void perf_ibs_get_mem_lvl(union ibs_op_data2 *op_data2,
 	if (ibs_caps & IBS_CAPS_ZEN4 &&
 	    ibs_data_src == IBS_DATA_SRC_EXT_NEAR_CCX_CACHE) {
 		data_src->mem_lvl = PERF_MEM_LVL_REM_CCE1 | PERF_MEM_LVL_HIT;
+		data_src->mem_lvl_num = PERF_MEM_LVLNUM_ANY_CACHE;
 		return;
 	}
 
@@ -769,11 +774,13 @@ static void perf_ibs_get_mem_lvl(union ibs_op_data2 *op_data2,
 	if (ibs_caps & IBS_CAPS_ZEN4) {
 		if (ibs_data_src == IBS_DATA_SRC_EXT_FAR_CCX_CACHE) {
 			data_src->mem_lvl = PERF_MEM_LVL_REM_CCE2 | PERF_MEM_LVL_HIT;
+			data_src->mem_lvl_num = PERF_MEM_LVLNUM_ANY_CACHE;
 			return;
 		}
 	} else {
 		if (ibs_data_src == IBS_DATA_SRC_REM_CACHE) {
 			data_src->mem_lvl = PERF_MEM_LVL_REM_CCE2 | PERF_MEM_LVL_HIT;
+			data_src->mem_lvl_num = PERF_MEM_LVLNUM_ANY_CACHE;
 			return;
 		}
 	}
@@ -784,6 +791,7 @@ static void perf_ibs_get_mem_lvl(union ibs_op_data2 *op_data2,
 			data_src->mem_lvl = PERF_MEM_LVL_LOC_RAM | PERF_MEM_LVL_HIT;
 		else
 			data_src->mem_lvl = PERF_MEM_LVL_REM_RAM1 | PERF_MEM_LVL_HIT;
+		data_src->mem_lvl_num = PERF_MEM_LVLNUM_RAM;
 		return;
 	}
 
@@ -832,10 +840,12 @@ static void perf_ibs_get_mem_lvl(union ibs_op_data2 *op_data2,
 	 */
 	if (op_data3->dc_miss_no_mab_alloc) {
 		data_src->mem_lvl = PERF_MEM_LVL_LFB | PERF_MEM_LVL_HIT;
+		data_src->mem_lvl_num = PERF_MEM_LVLNUM_LFB;
 		return;
 	}
 
 	data_src->mem_lvl = PERF_MEM_LVL_NA;
+	data_src->mem_lvl_num = PERF_MEM_LVLNUM_NA;
 }
 
 static bool perf_ibs_cache_hit_st_valid(void)
-- 
2.40.0.rc1.284.g88254d51c5-goog