linux-kernel - Re: [PATCH] arm64: defconfig: Enable Qualcomm interconnects as built-in

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: <92dd35a2-d1cc-4f2b-b3a8-5752ec33b0d3@kernel.org>
Date: Wed, 12 Mar 2025 09:56:05 +0100
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Christopher Obbard <christopher.obbard@...aro.org>,
 Dmitry Baryshkov <lumag@...nel.org>
Cc: Catalin Marinas <catalin.marinas@....com>, Will Deacon <will@...nel.org>,
 Bjorn Andersson <andersson@...nel.org>,
 Konrad Dybcio <konrad.dybcio@....qualcomm.com>,
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
 linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH] arm64: defconfig: Enable Qualcomm interconnects as
 built-in

On 11/03/2025 20:15, Christopher Obbard wrote:
> Hi Dmitry,
> 
> On Tue, 11 Mar 2025 at 19:58, Dmitry Baryshkov <lumag@...nel.org> wrote:
>>
>> On Tue, Mar 11, 2025 at 07:10:06PM +0100, Christopher Obbard wrote:
>>> I sent this patch to start the discussion, some things I found:
>>>
>>> 1) Some interconnects are missing from arm defconfig. Should they be =y too ?
>>
>> No, unless those are required for the UART console.
> 
> OK, that makes sense. FWIW the cryptic (to me, at least) commit log on
> https://web.git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6eee808134ecf1c1093ff1ddfc056dc5e469d0c3
> made me think that the interconnects should be built-in on all devices.
> 
> Of course, the real problem here is RB3gen2 not actually finding the
> UFS/eMMC device due to no interconnect driver.
> Until now, I have been building that into the kernel. I will
> investigate instead shoving into the initrd (in both debian and
> fedora) which should solve my issue and render this patchset useless.

For Qualcomm platforms you are expected to always have initramfs, thus
you will have the modules for UFS/eMMC mounts. I don't understand the
problem which you were trying to solve.

The interconnects were built in *only* because of need for serial
console. Only.

Best regards,
Krzysztof