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zephyr: idc: align the IDC payload to the cache line #11334

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Merged
lgirdwood merged 1 commit into from
Nov 4, 2026
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zephyr: idc: align the IDC payload to the cache line #11334

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8 changes: 6 additions & 2 deletions zephyr/include/rtos/idc.h
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Original file line number Diff line number Diff line change
Expand Up @@ -149,10 +149,14 @@
/** \brief IDC free function flags */
#define IDC_FREE_IRQ_ONLY BIT(0) /**< disable only irqs */

/** \brief IDC message payload. */
/**
* \brief IDC message payload.
*
* Placed in coherent (SHARED_DATA) memory and shared across cores.
*/
struct idc_payload {
uint8_t data[IDC_MAX_PAYLOAD_SIZE];
};
} __aligned(DCACHE_LINE_SIZE);

@kv2019i kv2019i Nov 3, 2026

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It's a bit funky to have this in in the type definition, but seems good otherwise.

@lgirdwood lgirdwood Nov 3, 2026

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This is still WIP btw, using latest clang with hifi.

@lgirdwood lgirdwood Nov 3, 2026

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Clang linker would optimize on a byte boundary for size/perf reasons. We will get this on the userspace tests and linux configs next.


/** \brief IDC message. */
struct idc_msg {
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