linux-kernel - [PATCH 2/6] coresight: Fix holes in struct etmv4

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Message-Id: <20250811-james-cs-syncfreq-v1-2-b001cd6e3404@linaro.org>
Date: Mon, 11 Aug 2025 10:32:07 +0100
From: James Clark <james.clark@...aro.org>
To: Suzuki K Poulose <suzuki.poulose@....com>, 
 Mike Leach <mike.leach@...aro.org>, 
 Alexander Shishkin <alexander.shishkin@...ux.intel.com>, 
 Jonathan Corbet <corbet@....net>, Leo Yan <leo.yan@....com>
Cc: coresight@...ts.linaro.org, linux-arm-kernel@...ts.infradead.org, 
 linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org, 
 James Clark <james.clark@...aro.org>
Subject: [PATCH 2/6] coresight: Fix holes in struct etmv4_config

Lots of u8s are mixed with u64s and u32s so repack it to save a bit
of space because there's one of these for each ETM.

Signed-off-by: James Clark <james.clark@...aro.org>
---
 drivers/hwtracing/coresight/coresight-etm4x.h | 19 ++++++++++++-------
 1 file changed, 12 insertions(+), 7 deletions(-)

diff --git a/drivers/hwtracing/coresight/coresight-etm4x.h b/drivers/hwtracing/coresight/coresight-etm4x.h
index 746627476bd3..a355a1e9606d 100644
--- a/drivers/hwtracing/coresight/coresight-etm4x.h
+++ b/drivers/hwtracing/coresight/coresight-etm4x.h
@@ -832,28 +832,33 @@ struct etmv4_config {
 	u32				vipcssctlr;
 	u8				seq_idx;
 	u8				syncfreq;
+	u8				cntr_idx;
+	u8				res_idx;
+	u8				ss_idx;
+	u8				addr_idx;
+	u8				addr_type[ETM_MAX_SINGLE_ADDR_CMP];
+	u8				ctxid_idx;
+	u8				vmid_idx;
 	u32				seq_ctrl[ETM_MAX_SEQ_STATES];
 	u32				seq_rst;
 	u32				seq_state;
-	u8				cntr_idx;
+
 	u32				cntrldvr[ETMv4_MAX_CNTR];
 	u32				cntr_ctrl[ETMv4_MAX_CNTR];
 	u32				cntr_val[ETMv4_MAX_CNTR];
-	u8				res_idx;
+
 	u32				res_ctrl[ETM_MAX_RES_SEL];
-	u8				ss_idx;
+
 	u32				ss_ctrl[ETM_MAX_SS_CMP];
 	u32				ss_status[ETM_MAX_SS_CMP];
 	u32				ss_pe_cmp[ETM_MAX_SS_CMP];
-	u8				addr_idx;
+
 	u64				addr_val[ETM_MAX_SINGLE_ADDR_CMP];
 	u64				addr_acc[ETM_MAX_SINGLE_ADDR_CMP];
-	u8				addr_type[ETM_MAX_SINGLE_ADDR_CMP];
-	u8				ctxid_idx;
+
 	u64				ctxid_pid[ETMv4_MAX_CTXID_CMP];
 	u32				ctxid_mask0;
 	u32				ctxid_mask1;
-	u8				vmid_idx;
 	u64				vmid_val[ETM_MAX_VMID_CMP];
 	u32				vmid_mask0;
 	u32				vmid_mask1;

-- 
2.34.1