From: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
To: Jianping Li <jianping.li@oss.qualcomm.com>,
andersson@kernel.org, konradybcio@kernel.org, robh@kernel.org,
krzk+dt@kernel.org, conor+dt@kernel.org
Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org, ekansh.gupta@oss.qualcomm.com,
stable@kernel.org
Subject: Re: [PATCH] arm64: dts: qcom: kodiak: avoid EFI overlap for ADSP remote heap
Date: Thu, 23 Apr 2026 10:50:50 +0200 [thread overview]
Message-ID: <e3b38ded-a323-48aa-b0c2-a9a3d5d364c9@oss.qualcomm.com> (raw)
In-Reply-To: <20260423063502.484-1-jianping.li@oss.qualcomm.com>
On 4/23/26 8:35 AM, Jianping Li wrote:
> On KODIAK platforms boot can fail when the DT "adsp-rpc-remote-heap"
> reserved-memory region overlaps with firmware allocations (UEFI/EFI
> runtime). The kernel then reports failure to reserve the region and
> subsequent EFI runtime activity may trigger aborts.
>
> The remote heap node was described as a fixed "no-map" region, which
> turns it into a hard carveout. Replace it with a "shared-dma-pool"
> reserved memory region with reusable CMA-backed allocation, specifying
> alignment and size.
>
> This avoids hard carveouts and reduces the chance of conflicting with
> firmware memory maps while keeping an explicit pool for ADSP remote
> heap usage.
>
> Fixes: 90a58ffa9c55 ("arm64: dts: qcom: kodiak: Add memory region for audiopd")
> Cc: stable@kernel.org
> Signed-off-by: Jianping Li <jianping.li@oss.qualcomm.com>
> ---
> arch/arm64/boot/dts/qcom/kodiak.dtsi | 9 ++++++---
> 1 file changed, 6 insertions(+), 3 deletions(-)
>
> diff --git a/arch/arm64/boot/dts/qcom/kodiak.dtsi b/arch/arm64/boot/dts/qcom/kodiak.dtsi
> index 988ca5f7c8a0..420219823496 100644
> --- a/arch/arm64/boot/dts/qcom/kodiak.dtsi
> +++ b/arch/arm64/boot/dts/qcom/kodiak.dtsi
> @@ -191,9 +191,12 @@ rmtfs_mem: rmtfs@9c900000 {
> qcom,vmid = <QCOM_SCM_VMID_MSS_MSA>;
> };
>
> - adsp_rpc_remote_heap_mem: adsp-rpc-remote-heap@9cb80000 {
> - reg = <0x0 0x9cb80000 0x0 0x800000>;
> - no-map;
> + adsp_rpc_remote_heap_mem: adsp-rpc-remote-heap {
> + compatible = "shared-dma-pool";
> + alloc-ranges = <0x0 0x00000000 0x0 0xffffffff>;
Since DRAM starts at 0x8000_0000, is it intended to only allow this
region to be in the lower 2 gigs?
(it may very well be for some historical reasons)
Konrad
next prev parent reply other threads:[~2026-04-23 8:50 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-23 6:35 [PATCH] arm64: dts: qcom: kodiak: avoid EFI overlap for ADSP remote heap Jianping Li
2026-04-23 8:50 ` Konrad Dybcio [this message]
2026-04-23 9:19 ` Ekansh Gupta
2026-04-23 9:28 ` Konrad Dybcio
2026-04-23 9:58 ` Ekansh Gupta
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