On Sun, Aug 19, 2012 at 04:34:50PM +0100, Michael Brown wrote: > On Sunday 19 Aug 2012 16:07:05 Avi Kivity wrote: > > (and that seabios needs changes to either work in > > big real mode, or to put the processor back into big real mode after > > returning from a PMM service. > > If seabios switches into protected mode when performing a PMM service, then > it > _must_ leave the segment limits at 4G when returning to real mode. To do > otherwise will violate the PMM spec, and will break conforming clients such > as > iPXE.
SeaBIOS does switch to 32bit mode during PMM calls and does switch to 16bit "big real" mode (segment limits set to 4G) on return. -Kevin -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
