On Sat, Mar 19, 2022 at 1:59 AM Bernhard Übelacker <bernha...@mailbox.org> wrote: > I tried to reproduce the issue with the help of a qemu VM. > > That way I found /usr/lib/ipxe/ipxe.lkrn working with specifying > a pentium2 CPU, but hangs with a pentium. > > Similarly I found the version 1.0.0+git-20150424.a25a16d-1 > does not show this issue, but all newer than this. > > And found in [1] a hint that building without > TIVOLI_VMM_WORKAROUND gives a Debian package that works too. > And indeed, attaching a debugger to the VM shows it hanging > always executing an fxsave and iret instruction, PF flag set, > while TIVOLI_VMM_WORKAROUND would also enable a fxsave instruction. > > Therefore at least either using the older package version > or rebuilding locally with above modification > might serve as a workaround. > > @Martin-Éric: Maybe you can confirm this, > otherwise my findings might be unrelated.
@Bernhard: Thanks for the heads up. I first tried downgrading to earlier versions found at <https://deb.debian.org/debian/pool/main/i/ipxe/>. 1.0.0+git-20190125.36a4c85-1: Fails to launch as above. 1.0.0+git-20161027.b991c67-1: Fails to launch as above. 1.0.0+git-20141004.86285d1-1: Immediately shows me the PXE menu. $ find . -name general.h ./debian/config/general.h ./src/config/vbox/general.h ./src/config/general.h ./src/config/qemu/general.h ./src/config/cloud/general.h $ rgrep TIVOLI_VMM_WORKAROUND src/config/general.h:#define TIVOLI_VMM_WORKAROUND /* Work around the Tivoli VMM's garbling of SSE src/config/qemu/general.h:#undef TIVOLI_VMM_WORKAROUND src/arch/x86/transitions/librm.S:#ifdef TIVOLI_VMM_WORKAROUND src/arch/x86/transitions/librm.S:#ifdef TIVOLI_VMM_WORKAROUND src/arch/x86/transitions/librm.S:#ifdef TIVOLI_VMM_WORKAROUND I assume that you meant in <src/config/general.h>? Where and how did you disable that? Martin-Éric
