linux-kernel - Re: [PATCH] arm64: dts: mediatek: mt8186-corsola: Update ADSP reserved memory region

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <d39045cf-bcf5-4d9a-8347-752ff09ccc24@collabora.com>
Date: Mon, 22 Jul 2024 11:10:30 +0200
From: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
To: Fei Shao <fshao@...omium.org>
Cc: Chen-Yu Tsai <wenst@...omium.org>, Conor Dooley <conor+dt@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Matthias Brugger <matthias.bgg@...il.com>, Rob Herring <robh@...nel.org>,
 devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
 linux-kernel@...r.kernel.org, linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH] arm64: dts: mediatek: mt8186-corsola: Update ADSP
 reserved memory region

Il 22/07/24 05:37, Fei Shao ha scritto:
> On Fri, Jul 19, 2024 at 5:22 PM AngeloGioacchino Del Regno
> <angelogioacchino.delregno@...labora.com> wrote:
>>
>> Il 19/07/24 06:58, Fei Shao ha scritto:
>>> Corsola firmware reserves the memory region of [0x60000000, 0x61100000)
>>
>> Sorry but if the region is supposed to be 0x1100000 long....
>>
>>> exclusively for ADSP usage.
>>> But in fact, a 6 MB "hole" of [0x60A00000, 0x61000000) didn't get
>>> assigned to the ADSP node in the Corsola device tree, meaning no audio
>>> tasks can access and utilize that memory section.
>>>
>>> Update the reserved ADSP memory region to fill the gap.
>>>
>>> Fixes: 8855d01fb81f ("arm64: dts: mediatek: Add MT8186 Krabby platform based Tentacruel / Tentacool")
>>> Signed-off-by: Fei Shao <fshao@...omium.org>
>>> ---
>>>
>>>    arch/arm64/boot/dts/mediatek/mt8186-corsola.dtsi | 2 +-
>>>    1 file changed, 1 insertion(+), 1 deletion(-)
>>>
>>> diff --git a/arch/arm64/boot/dts/mediatek/mt8186-corsola.dtsi b/arch/arm64/boot/dts/mediatek/mt8186-corsola.dtsi
>>> index afdab5724eaa..0c4a26117428 100644
>>> --- a/arch/arm64/boot/dts/mediatek/mt8186-corsola.dtsi
>>> +++ b/arch/arm64/boot/dts/mediatek/mt8186-corsola.dtsi
>>> @@ -169,7 +169,7 @@ adsp_dma_mem: memory@...00000 {
>>>
>>>                adsp_mem: memory@...00000 {
>>>                        compatible = "shared-dma-pool";
>>> -                     reg = <0 0x60000000 0 0xA00000>;
>>> +                     reg = <0 0x60000000 0 0x1000000>;
>>
>> ...why are you making it 0x1000000 long?
> 
> Because 0x61000000-0x61100000 belongs to another existing region,
> `adsp_dma_mem`.
> It's slightly confusing because the diff doesn't show that directly...
> here's its snippet for ref:
> 

Oh, sorry about that, that's right.

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>

> adsp_dma_mem: memory@...00000 {
>          compatible = "shared-dma-pool";
>          reg = <0 0x61000000 0 0x100000>;
>          no-map;
> };
> 
> Regards,
> Fei
>>
>> Cheers,
>> Angelo
>>
>>>                        no-map;
>>>                };
>>>
>>
>>