Re: [PATCH v1 1/4] arm64: dts: qcom: kodiak: Make the ADSP remote heap no-map

[Konrad Dybcio]

On 10/15/26 9:15 AM, Jianping Li wrote:
> The ADSP remote heap is declared as a reusable CMA pool. FastRPC
> assigns the entire region to the DSP through qcom_scm_assign_mem()
> during probe without allocating the pages from CMA. Consequently,
> the pages remain available for movable HLOS allocations even after
> HLOS access to the region has been revoked.
> 
> On Kodiak, a synchronous external abort was reported during storage
> testing when the kernel accessed memory within the ADSP remote heap.
> The faulting address was outside the HLOS stage-2 mapping.
> 
> Replace reusable with no-map to prevent the region from being reused
> for normal kernel allocations and exclude it from the kernel's
> standard memory mapping.
> 
> Fixes: 9d7d847ff1c50 ("arm64: dts: qcom: kodiak: avoid EFI overlap for ADSP remote heap")
> Link: https://lore.kernel.org/all/20260423063502.484-1-jianping.li@xxxxxxxxxxxxxxxx/
> Signed-off-by: Jianping Li <jianping.li@xxxxxxxxxxxxxxxx>
> ---

Reviewed-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxxxxxxxx>

Konrad