08:09 <arnd> bjdooks: I think we still have people regularly test BE userland using arm64 kvm, in order to check for toolchain regressions. I have not heard of anyone actually using it in production for a very long time though.

08:11 <arnd> bjdooks: In case we ever want to remove the support entirely in the future, do you know of actual users we should ask first?

08:12 <arnd> important_person: I meant on arm64 specifically ;-)

08:13 <geertu> arnd: Oops, forgot this is visible on all channels, not just on the intended one.

08:14 <geertu> FTR, I do not have BE ARM userland.

08:23 <ukleinek> geertu: luckily you didn't join https://idlerpg.lolhosting.net/, a nick change would result in a penalty of 30 scaled by your level :-)

08:43 <maz> arnd: I'd be very interested in finding out about those BE use cases, because I haven't tested *any* BE payload in KVM for... at least a few years.

08:44 <maz> anything that looks like a viable userspace environment would be nice.

08:46 <arnd> maz: for minimal testing, there is tools/testing/selftests/wireguard/qemu/ in the kernel itself, which builds a tiny kernel and userland that is just enough to run the wireguard testsuite on all targets that have both qemu and musl, including aarch64_be and armv7eb

08:47 <arnd> I'm fairly sure that both the gcc and glibc maintainers have something as well to test their respective projects, but I don't know where those are maintained or who takes care of htem

08:49 <arnd> In the past, huawei had a BSP for their higher-end networking hardware, but I can't find any of that now, the only mention I found from huawei was their work on aarch64be rust in 2021 https://trusted-programming.github.io/2021/02/07/our-rust-mission-at-huawei.html

08:50 <arnd> I suspect that this one was more about checking boxes on rust features than needing aarch64be support specifically

08:51 <arnd> (they also did it for ilp32, so I think they just tried to do all targets that have a C toolchain)

08:51 <maz> arnd: ah, the wireguard thing looks like something I could use. thanks for the hint!

08:53 <javierm_> maz, arnd: https://github.com/DaanDeMeyer/mkosi-kernel is also great for testing, I don't know if there are distros that provide BE packages though...

08:57 <arnd> javierm_: I think awilfox at some point wanted to do an aarc64be adelielinux port, but that never materialized.

08:58 <arnd> it wouldn't work on a lot of hardware outside of kvm because of both driver bugs and uefi requiring LE kernels

09:24 <javierm_> arnd: yeah, in Fedora/CentOS/RHEL the only BE arch is s390x nowadays. Even for ppc64 only LE is supported

10:58 <arnd> I looked up Freescale/NXP Layerscape support for big endian, as I had remembered that as one of the main users. I see that the LS1043A BSP version 0.5 from 2015 mentions adding big-endian support, but all the download files for that version are gone now. Later BSPs support the wider QorIQ/Layerscape family rather than a single chip, and Version 2.0 from 2017 no longer mentions big-endian support at all.

11:32 <CountPumpkin> It's fine, I hope all the big-endian guys can move on to other passions in their life, like opening bananas from the bottom, and orienting toilet paper rolls the wrong way around.

11:36 <maz> one day, we'll have world peace, and PDP-endianness.

11:38 <javierm_> it reminds me of https://en.wikipedia.org/wiki/The_Butter_Battle_Book

11:41 <javierm_> maz: TIL about middle-endian thanks to you :)

11:55 <geertu> javierm_: The 64-bit people missed several opportunities to introduce more confusion ;-)

12:02 <javierm_> geertu: :D

12:11 <maz> geertu: I'm sure 128-bit people will fix that for you! :)

15:45 <ukleinek> krzk: I want to specify in a dt-binding that says: either propery $A xor property $B is required. Do you have an example handy for me to copy from?

15:47 <krzk> ukleinek: oneOf, https://elixir.bootlin.com/linux/v5.17-rc2/source/Documentation/devicetree/bindings/reserved-memory/reserved-memory.yaml#L91

15:47 <krzk> if I got your problem correct

15:52 <ukleinek> krzk: looks good. Thanks!

21:02 <honeydatax> https://github.com/honeydatax/gcc-asm