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logging: mtrace: Reset host and dsp pointer during init #105357

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Merged
nashif merged 1 commit into from
Mar 16, 2026
+6 −0
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logging: mtrace: Reset host and dsp pointer during init #105357

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6 changes: 6 additions & 0 deletions subsys/logging/backends/log_backend_adsp_mtrace.c
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Original file line number Diff line number Diff line change
Expand Up @@ -79,12 +79,18 @@ static void mtrace_init(void)

slot = adsp_dw_request_slot(&slot_desc, NULL);
#else
struct adsp_debug_slot *slot = (struct adsp_debug_slot *)
ADSP_DW->slots[ADSP_DW_SLOT_NUM_MTRACE];

if (ADSP_DW->descs[ADSP_DW_SLOT_NUM_MTRACE].type == MTRACE_LOGGING_SLOT_TYPE(MTRACE_CORE)) {
return;
}

ADSP_DW->descs[ADSP_DW_SLOT_NUM_MTRACE].type = MTRACE_LOGGING_SLOT_TYPE(MTRACE_CORE);
#endif

slot->host_ptr = 0;
slot->dsp_ptr = 0;

@kv2019i kv2019i Mar 12, 2026

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@ujfalusi I wonder in which conditions this happens. The code does assume these to be zero after hw init, so indeed this go belly up. I just tried on ACE30 system and I see zeros at boot.

@ujfalusi ujfalusi Mar 16, 2026

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It is reported as part of a Linux kernel PR: thesofproject/linux#5690 (comment)

}

static size_t mtrace_out(int8_t *str, size_t len, size_t *space_left)
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