Avi Kivity wrote:
Avi Kivity wrote:
Anthony Liguori wrote:
This patch refactors the current hypercall infrastructure to better
support live
migration and SMP. It eliminates the hypercall page by trapping the UD
exception that would occur if you used the wrong hypercall
instruction for the
underlying architecture and replacing it with the right one lazily.
It also introduces the infrastructure to probe for hypercall
available via
CPUID leaves 0x40000000. CPUID leaf 0x40000001 should be filled out by
userspace.
A fall-out of this patch is that the unhandled hypercalls no longer
trap to
userspace. There is very little reason though to use a hypercall to
communicate
with userspace as PIO or MMIO can be used. There is no code in tree
that uses
userspace hypercalls.
Surprisingly, this patch kills Windows XP (ACPI HAL). I'll try to
find out why.
Not trapping #UD brings things back to normal. So, Windows likes to
execute undefined instructions, and we don'd handle these well.
Okay, vmx_inject_ud() was broken. Fixed now.
--
error compiling committee.c: too many arguments to function
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