Re: QEMU PIC indirection patch for in-kernel APIC work

Dong, Eddie
2007-04-05T14:57:13Z

Dor Laor wrote:
> So for the sake of the next arguments, what was the fuel running the
> decision of moving all the X-PI[c|t] things into the Xen?
PIT is in Xen at very beginning when HVM support is designed due to
performance
reason. Moving PIC to VMM is also for performance reason at that time
(SMP is not there yet), also potential for SMP too.
APIC was enabled 2 months later after PIC and it was pretty nature to be
in
VMM since PIC was already in VMM at that time :-)
Thanks, eddie