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ipc4: helper: fix buffer core assignment for cross-core binds #11048

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Merged
lgirdwood merged 1 commit into from
Jul 30, 2026
+7 −2
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ipc4: helper: fix buffer core assignment for cross-core binds #11048

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9 changes: 7 additions & 2 deletions src/ipc/ipc4/helper.c
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Original file line number Diff line number Diff line change
Expand Up @@ -673,8 +673,13 @@ __cold static struct comp_buffer *ipc4_create_buffer(struct comp_dev *src, bool
ipc_buf.comp.id = IPC4_COMP_ID(src_queue, dst_queue);
ipc_buf.comp.pipeline_id = src->ipc_config.pipeline_id;

assert(IS_ENABLED(CONFIG_SOF_USERSPACE_LL) || src->ipc_config.core == cpu_get_id());
ipc_buf.comp.core = src->ipc_config.core;
/* The buffer belongs to the core on which it is created. For a same-core bind
* ipc4_process_on_core() has already migrated us to the src core (== dst core),
* while a cross-core bind is always processed on the primary core. cpu_get_id()
* is privileged and so avoided here.
*/
ipc_buf.comp.core = is_shared ? PLATFORM_PRIMARY_CORE_ID : src->ipc_config.core;
assert(IS_ENABLED(CONFIG_SOF_USERSPACE_LL) || ipc_buf.comp.core == cpu_get_id());

return buffer_new(alloc, &ipc_buf, is_shared);
}
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