Avi Kivity wrote: > 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. >
Yeah, I was just about to send the patch for that. Sorry about that, I didn't even think to test Windows... Regards, Anthony Liguori ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
