Hi Mark, On Wed, Dec 20, 2023 at 11:30:27AM +0000, Mark Cave-Ayland wrote: > On 20/12/2023 10:47, Arnd Bergmann wrote: > > > On Wed, Dec 20, 2023, at 09:54, John Paul Adrian Glaubitz wrote: > > > On Wed, 2023-12-20 at 08:36 +0000, Arnd Bergmann wrote: > > > > All of these were found through inspection rather than testing, > > > > so there is a good chance that other fatal kernel bugs prevent > > > > testing in qemu, at least until the fixes from Andreas' tree > > > > are included. > > > > > > Andreas has fixes for these issues? > > > > Not sure, all I know is that > > > > - Andreas has some fixes for Leon in his tree > > - Sam is unable to boot mainline in qemu > > - There is an unknown set of bugs in sparc32 since it has not > > been tested for many years without Andreas' patches > > > > it appears that the qemu developers are still testing the sun4m > > model against old Linux and Solaris installations [1], but > > failure to run the leon3 model could still be any combination > > of kernel, qemu or configuration problems. > > > > Arnd > > > > [1] https://wiki.qemu.org/Documentation/Platforms/SPARC#Compatibility > > Hi all: I'm one of the QEMU sun4m and sun4u maintainers so thought it would > be worth a few comments here. I can imagine that the proposal to drop sun4m from the kernel is then not the best news this December - sorry about that. > > My SPARC work on QEMU is unsponsored, so of course it is reliant upon me > finding time between work and family to fix various bugs. This means that I > simply don't have the time to constantly build and test the latest kernels: > what generally happens is that someone pings me a regression bug report when > something breaks and provides a test kernel/rootfs for me to look at. In the > past both Rob Landley and Guenter Roeck have often flagged regressions and > kindly provided these for me. > > Other than that I just assume that everything is still working against the > upstream kernel. It is a fantastic tool that we can build and boot a kernel using qemu and your work is appreciated - thanks! > > The leon3_generic machine is maintained by different people so I'd suggest > contacting them: see [1] for their contact details. I see there is an > avocado boot test for the leon3_generic machine included within the QEMU > source tree, but it uses a downloadable image of HelenOS rather than Linux. Thanks for the pointer, I will try to reach out to them when I have something a bit more solid than "it does not work". I tried to hack around a little in qemu and I have an idea where things goes wrong. The leon_generic assumes another address layout than what is used by the kernel, so the very first jump to a kernel address fails. Sam
