This prevents KVM guests from crashing that run iPXE on host CPUs without "unrestricted_guest" support.
Once KVM gets the FXSAVE / FXRSTOR emulation feature (*), and the feature becomes widely available to users, we can back out this change from iPXE. (*) Already in progress by Radim: [PATCH 0/2] KVM: x86: emulate fxsave and fxrstor https://www.mail-archive.com/linux-kernel@vger.kernel.org/msg1258895.html https://www.spinics.net/lists/kernel/msg2370327.html Cc: Bandan Das <b...@redhat.com> Cc: Gerd Hoffmann <kra...@redhat.com> Cc: Greg <rollenwi...@yahoo.com> Cc: Michael Brown <mc...@ipxe.org> Cc: Michael Prokop <launch...@michael-prokop.at> Cc: Paolo Bonzini <pbonz...@redhat.com> Cc: Peter Pickford <a...@netremedies.ca> Cc: Radim Krčmář <rkrc...@redhat.com> Ref: https://bugs.archlinux.org/task/50778 Ref: https://bugs.launchpad.net/qemu/+bug/1623276 Ref: https://bugzilla.proxmox.com/show_bug.cgi?id=1182 Ref: https://bugzilla.redhat.com/show_bug.cgi?id=1356762 Signed-off-by: Laszlo Ersek <ler...@redhat.com> --- src/config/qemu/general.h | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/src/config/qemu/general.h b/src/config/qemu/general.h index 30f60d3f704a..a084497359fe 100644 --- a/src/config/qemu/general.h +++ b/src/config/qemu/general.h @@ -8,3 +8,8 @@ /* Work around missing EFI_PXE_BASE_CODE_PROTOCOL */ #define EFI_DOWNGRADE_UX + +/* The Tivoli VMM workaround causes a KVM emulation failure on hosts + * without unrestricted_guest support + */ +#undef TIVOLI_VMM_WORKAROUND -- 2.9.2 _______________________________________________ ipxe-devel mailing list ipxe-devel@lists.ipxe.org https://lists.ipxe.org/mailman/listinfo.cgi/ipxe-devel