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

[Ekansh Gupta <ekansh.gupta@oss.qualcomm.com>]

On 14-10-2026 14:08, 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 HLOS access to the region has been revoked.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 Talos, GPU stress testing triggers a synchronous external abort
> when zram accesses pages within the ADSP remote heap.
> 
> 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: b0b51a5f1911f ("arm64: dts: qcom: talos: Add memory-region for audio PD")
> Link: https://lore.kernel.org/all/20260424-talosaudio-v3-1-9e2ad5d78a2e@oss.qualcomm.com/
> Signed-off-by: Jianping Li <jianping.li@oss.qualcomm.com>
> ---
>  arch/arm64/boot/dts/qcom/talos.dtsi | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/boot/dts/qcom/talos.dtsi b/arch/arm64/boot/dts/qcom/talos.dtsi
> index 8ed6f2755705..b14952b57d6a 100644
> --- a/arch/arm64/boot/dts/qcom/talos.dtsi
> +++ b/arch/arm64/boot/dts/qcom/talos.dtsi
> @@ -682,7 +682,7 @@ pil_gpu_mem: pil-gpu@97715000 {
>  		adsp_rpc_remote_heap_mem: adsp-rpc-remote-heap {
>  			compatible = "shared-dma-pool";
>  			alloc-ranges = <0x0 0x80000000 0x0 0x80000000>;
> -			reusable;
> +			no-map;
>  			alignment = <0x0 0x400000>;
>  			size = <0x0 0x800000>;
>  		};

Reviewed-by: Ekansh Gupta <ekansh.gupta@oss.qualcomm.com>