On 07/02/20 00:23, Alexey Kardashevskiy wrote: >> Right, not unlike what you get with vof=on. :) I'm not against at all >> that idea. I just don't understand what you refer to below as (2). >> Does petitboot not have the problem because it kexecs the new kernel? > > Petitboot does not have this problem *if* it runs without SLOF, i.e. > directly via -kernel and -initrd and uses OF CI (cut down version, about > v3-v4 of my patchset, without block devices and grub lookup). In this > case there is one device tree instance, fully synchronized with the > machine state. > > If there is still SLOF and (2) is happening, then petitboot is screwed > as any other kernel.
Ok, so "minimal pseudo-OpenFirmware in QEMU" is doable and can get everything right; it's just work to set up PCI and do all that other do_driver_stuff(), so you can either do it yourself or use Linux+petitboot. Is this correct? Also, can a normal distro kernel run via -kernel/-initrd + the minimal firmware in QEMU? Paolo
