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: Abel Vesa <abelvesa@kernel.org>, Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
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 2/4] arm64: dts: qcom: glymur: Make the ADSP remote heap no-map
Date: Fri, 16 Oct 2026 10:18:29 +0530 [thread overview]
Message-ID: <3c859faf-345a-4ef6-bb61-ff726e4b5d66@oss.qualcomm.com> (raw)
In-Reply-To: <20261015071511.977-3-jianping.li@oss.qualcomm.com>
On 15-10-2026 12:45, Jianping Li wrote:
> The ADSP remote heap is declared as a reusable shared DMA pool.
> Allowing the kernel to reuse this region is incompatible with handing
> the entire region over to the DSP, as HLOS allocations may then access
> memory for which HLOS no longer has access permissions.
>
> The same configuration has caused synchronous external aborts on
> other platforms when the kernel accesses pages within the ADSP remote
> heap.
>
> Replace reusable with no-map to keep the region reserved for the DSP
> and exclude it from the kernel's standard memory mapping.
>
> Fixes: 67641246eabd0 ("arm64: dts: qcom: glymur: Add memory-region for audio PD")
> Link: https://lore.kernel.org/all/20260701-glymur-audio-
> v1-1-2c3862d95a09@oss.qualcomm.com/
> Signed-off-by: Jianping Li <jianping.li@oss.qualcomm.com>
Reviewed-by: Ekansh Gupta <ekansh.gupta@oss.qualcomm.com>
next prev parent reply other threads:[~2026-10-16 4:48 UTC|newest]
Thread overview: 13+ 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
2026-10-16 4:48 ` Ekansh Gupta
2026-10-15 7:15 ` [PATCH v1 2/4] arm64: dts: qcom: glymur: " Jianping Li
2026-10-15 8:00 ` Konrad Dybcio
2026-10-16 4:48 ` Ekansh Gupta [this message]
2026-10-15 7:15 ` [PATCH v1 3/4] arm64: dts: qcom: sm8250: " Jianping Li
2026-10-15 8:00 ` Konrad Dybcio
2026-10-16 4:49 ` Ekansh Gupta
2026-10-15 7:15 ` [PATCH v1 4/4] arm64: dts: qcom: sm8750: " Jianping Li
2026-10-15 8:01 ` Konrad Dybcio
2026-10-16 4:49 ` Ekansh Gupta
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