On 19/05/2026 16:48, Yeoreum Yun wrote:

According to IHI006H Embedded Trace Macrocell Architecture Specification [0], n could be 0-2 for TCRSEQEVR<n> when TCRIDR5.NUMSEQSTATE is 0b100.

Therefore, introduce ETM_MAX_SEQ_TRANSITIONS macro and apply this in TCRSEQEVR<n> relevant fields.

Link: https://developer.arm.com/documentation/ihi0064/latest/ [0] Suggestedby: Leo Yan leo.yan@arm.com Signed-off-by: Yeoreum Yun yeoreum.yun@arm.com

---

drivers/hwtracing/coresight/coresight-etm4x-cfg.c | 2 +- drivers/hwtracing/coresight/coresight-etm4x.h | 5 +++-- 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/hwtracing/coresight/coresight-etm4x-cfg.c b/drivers/hwtracing/coresight/coresight-etm4x-cfg.c index c302072b293a..e1a59b434505 100644 --- a/drivers/hwtracing/coresight/coresight-etm4x-cfg.c +++ b/drivers/hwtracing/coresight/coresight-etm4x-cfg.c @@ -76,7 +76,7 @@ static int etm4_cfg_map_reg_offset(struct etmv4_drvdata *drvdata, } else if ((offset & GENMASK(11, 4)) == TRCSEQEVRn(0)) { /* sequencer state control registers */ idx = (offset & GENMASK(3, 0)) / 4;

• if (idx < ETM_MAX_SEQ_STATES) {
  

• if (idx < ETM_MAX_SEQ_TRANSITIONS) {
  reg_csdev->driver_regval = &drvcfg->seq_ctrl[idx];
  err = 0;
  

  }

diff --git a/drivers/hwtracing/coresight/coresight-etm4x.h b/drivers/hwtracing/coresight/coresight-etm4x.h index 89d81ce4e04e..60e08ab085c5 100644 --- a/drivers/hwtracing/coresight/coresight-etm4x.h +++ b/drivers/hwtracing/coresight/coresight-etm4x.h @@ -614,6 +614,7 @@ static inline u32 etm4_res_sel_pair(u8 res_sel_idx) #define ETM_MAX_NR_PE 8 #define ETMv4_MAX_CNTR 4 #define ETM_MAX_SEQ_STATES 4 +#define ETM_MAX_SEQ_TRANSITIONS (ETM_MAX_SEQ_STATES - 1)

Similar to the other comment on the patch, please don't tie this to SEQ_STATES. Simpl define.

#define ETM_MAX_SEQ_CTRLS 3

Suzuki

#define ETM_MAX_EXT_INP_SEL 4 #define ETM_MAX_EXT_INP 256 #define ETM_MAX_EXT_OUT 4 @@ -877,7 +878,7 @@ struct etmv4_config { u32 vipcssctlr; u8 seq_idx; u8 syncfreq;

• u32 seq_ctrl[ETM_MAX_SEQ_STATES];

• u32 seq_ctrl[ETM_MAX_SEQ_TRANSITIONS]; u32 seq_rst; u32 seq_state; u8 cntr_idx;

@@ -928,7 +929,7 @@ struct etmv4_save_state { u32 trcvissctlr; u32 trcvipcssctlr;

• u32 trcseqevr[ETM_MAX_SEQ_STATES];

• u32 trcseqevr[ETM_MAX_SEQ_TRANSITIONS]; u32 trcseqrstevr; u32 trcseqstr; u32 trcextinselr;