On Mon, 20 Jul 2020 at 15:55, Guenter Roeck <linux@xxxxxxxxxxxx> wrote: > Ah, sorry, you can't use the upstream version of qemu to test mps2-an385 > Linux images. You'll have to use a version from https://github.com/groeck/qemu. > I'd recommend to use the v5.0.0-local branch. > > I had to make some changes to qemu to be able to boot mps2-an385. > I tried to submit those changes into upstream qemu, but that was > rejected because, as I was told, the qemu implementation > would no longer reflect the real hardware with those changes in > place. Yes; the rationale is that if you wanted to boot a kernel on an actual MPS2 board you'd need a bit of guest code to start it up (and to bundle the initrd/dtb in with it), so since you need to write that code anyway you could use it for booting the kernel in QEMU too. I appreciate that this is awkward for kernel developers (and perhaps for some other users too), but QEMU's handling of -kernel and built-in-bootloader code is already a morass of special cases and do-what-I-mean behaviour that I'm not enthusiastic about further complicating :-) (https://lists.gnu.org/archive/html/qemu-arm/2018-06/msg00393.html has the archive of our original discussion on the point, for other readers of this post interested in further context and discussion.) thanks -- PMM
