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

[Jianping Li]

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HLOS access to the region has been revoked.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@xxxxxxxxxxxxxxxx/
Signed-off-by: Jianping Li <jianping.li@xxxxxxxxxxxxxxxx>
---
 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>;
 		};
-- 
2.43.0