From: Ekansh Gupta <ekansh.gupta@oss.qualcomm.com>
To: Jianping Li <jianping.li@oss.qualcomm.com>,
Bjorn Andersson <andersson@kernel.org>,
Konrad Dybcio <konradybcio@kernel.org>
Cc: Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org, quic_chennak@quicinc.com
Subject: Re: [PATCH v1] arm64: dts: qcom: talos: Make the ADSP remote heap no-map
Date: Wed, 14 Oct 2026 14:40:45 +0530 [thread overview]
Message-ID: <c4820536-bd14-4377-9966-80d787fec19e@oss.qualcomm.com> (raw)
In-Reply-To: <20261014083820.468-1-jianping.li@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 HLOS access to the region has been revoked.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>
next prev parent reply other threads:[~2026-10-14 9:10 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-14 8:38 [PATCH v1] arm64: dts: qcom: talos: Make the ADSP remote heap no-map Jianping Li
2026-10-14 8:52 ` sashiko-bot
2026-10-14 9:07 ` Konrad Dybcio
2026-10-14 9:10 ` Ekansh Gupta [this message]
2026-10-14 16:41 ` Val Packett
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