From: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
To: Jianping Li <jianping.li@oss.qualcomm.com>,
Bjorn Andersson <andersson@kernel.org>,
Konrad Dybcio <konradybcio@kernel.org>
Cc: Abel Vesa <abelvesa@kernel.org>, Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Ekansh Gupta <ekansh.gupta@oss.qualcomm.com>,
Vinayak Katoch <vinayak.katoch@oss.qualcomm.com>,
Alexey Klimov <alexey.klimov@linaro.org>,
linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org, quic_chennak@quicinc.com
Subject: Re: [PATCH v1 3/4] arm64: dts: qcom: sm8250: Make the ADSP remote heap no-map
Date: Thu, 15 Oct 2026 10:00:53 +0200 [thread overview]
Message-ID: <9e591ab5-d1f1-4ede-bd0b-ab0241394d4e@oss.qualcomm.com> (raw)
In-Reply-To: <20261015071511.977-4-jianping.li@oss.qualcomm.com>
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 during probe without allocating
> the pages from CMA. This allows movable HLOS allocations to use pages
> within the region after HLOS access permissions have been revoked,
> potentially causing synchronous external aborts.
>
> 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: 531ce288b6dd4 ("arm64: dts: qcom: sm8250: Add memory-region for audio PD")
> Link: https://lore.kernel.org/all/20260619-sm8250-audio-v1-1-8a76e033e209@oss.qualcomm.com/
> Signed-off-by: Jianping Li <jianping.li@oss.qualcomm.com>
> ---
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Konrad
next prev parent reply other threads:[~2026-10-15 8:01 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-15 7:15 [PATCH v1 0/4] arm64: dts: qcom: Make ADSP remote heaps no-map Jianping Li
2026-10-15 7:15 ` [PATCH v1 1/4] arm64: dts: qcom: kodiak: Make the ADSP remote heap no-map Jianping Li
2026-10-15 8:00 ` Konrad Dybcio
2026-10-15 7:15 ` [PATCH v1 2/4] arm64: dts: qcom: glymur: " Jianping Li
2026-10-15 8:00 ` Konrad Dybcio
2026-10-15 7:15 ` [PATCH v1 3/4] arm64: dts: qcom: sm8250: " Jianping Li
2026-10-15 8:00 ` Konrad Dybcio [this message]
2026-10-15 7:15 ` [PATCH v1 4/4] arm64: dts: qcom: sm8750: " Jianping Li
2026-10-15 8:01 ` Konrad Dybcio
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