On Fri, Jul 10, 2015 at 4:16 AM, Paolo Bonzini <[email protected]> wrote: > > > On 09/07/2015 20:33, Andy Lutomirski wrote: >> On Wed, Jul 8, 2015 at 10:59 PM, Ingo Molnar <[email protected]> wrote: > >> The big downside of that, or of writing a more ad-hoc emulator, is >> understanding what the semantics of all the weird vm86plus stuff is >> supposed to be in the first place. > > Do you mean VIF/VIP and the other vm86 mode extensions? Or is vm86plus > something in Linux?
Something in Linux written for DOSEMU's benefit. I don't really understand what it encompasses. Oddly, Linux doesn't use the virtual mode extensions. Instead, it emulates them (but probably not very well). So STI manipulates a fake VIF flag and checks a fake VIP flag. There's also a huge hack involving 0xA0000. --Andy -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
