iPXE commit 71560d185475 added FXSAVE and FXRSTOR instructions. On KVM
hosts without "unrestricted_guest" support, these expose a gap in KVM's
big real mode emulation, leading to guest crashes.
Radim has just posted the KVM patches. I think it might make sense to
suppress the regression of user experience within iPXE, until the KVM
feature reaches end-users. (Especially because the workaround for the
Tivoli VMM bug, which needed the FXSAVE and FXRSTOR instructions, is not
useful on KVM.)
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>
Thanks
Laszlo
Laszlo Ersek (2):
[librm] Conditionalize the workaround for the Tivoli VMM's SSE
garbling
[build] Disable TIVOLI_VMM_WORKAROUND in the qemu configuration
src/config/general.h | 3 +++
src/config/qemu/general.h | 5 +++++
src/arch/x86/transitions/librm.S | 15 ++++++++++++++-
3 files changed, 22 insertions(+), 1 deletion(-)
--
2.9.2
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