Paolo Bonzini <pbonz...@redhat.com> writes: > Il 21/02/2013 18:12, David Woodhouse ha scritto: >>> > Since >>> > - I like kvm, and >>> > - I cannot easily change my hardware (which doesn't support UG), and >>> > - I prefer to run the RHEL-6 kernel which has "old" KVM, >>> > I depend on David's fix for the PAM registers. >> Which means your suspend/resume is broken. Yay! :) >> >> Anthony's patchset should hopefully fix that. >> >> I wonder what it would take to work around the KVM bug in qemu though; >> can we actually *emulate* 16-bit mode instead of using KVM, on the >> kernels where KVM is broken? And then transition back to using KVM when >> we switch to 32-bit or 64-bit mode? > > I don't think you want to do that. It would be really slow, it would > trade some emulation bugs for others, and people who mind security would > not appreciate the additional attack surface of TCG. > > (BTW, that's how the very first version of KVM worked. It didn't use > hardware virtualization at all until entering 64-bit mode, IIRC).
Pre-released versions, yes. Avi started with emulating up to 64-bit and worked up from there. None of the public versions ever implemented this. Regards, Anthony Liguori > > I think we just have to fix it in 1.5, and suggest a newer kernel to > everyone else. > > Paolo
