Re: [PATCH v1 4/4] arm64: dts: qcom: sm8750: Make the ADSP remote heap no-map

[Ekansh Gupta]

On 15-10-2026 12:45, Jianping Li wrote:
> The ADSP remote heap is declared as a reusable shared DMA pool.
> Allowing the kernel to reuse this region is incompatible with handing
> the entire region over to the DSP, as HLOS allocations may access
> pages for which HLOS no longer has access permissions.
> 
> The same configuration has caused synchronous external aborts on
> other platforms when the kernel accesses pages within the ADSP remote
> heap.
> 
> Replace reusable with no-map to keep the region reserved for the DSP
> and exclude it from the kernel's standard memory mapping.
> 
> Fixes: 0bcf9ca23a873 ("arm64: dts: qcom: sm8750: add memory node for adsp fastrpc")
> Link: https://lore.kernel.org/all/20251209-sm8750-fastrpc-adsp-v3-1-
> ccfff49a8af9@xxxxxxxxxx/
> Signed-off-by: Jianping Li <jianping.li@xxxxxxxxxxxxxxxx>

Reviewed-by: Ekansh Gupta <ekansh.gupta@xxxxxxxxxxxxxxxx>