Andreas, That's true, I think we would also need to do something in terms of tricking the guest OS into thinking it's on an armv5 CPU even when its on an armv6. This would prevent anyone who dynamically checks what they can do from thinking they have more capabilities than we implemented. That seems simple enough, we just need to change what is returned by CP15_r0. I don't know if Linux only relies on compile time decisions or if it does stuff at runtime to determine what it can use, for example what layout of page table to use. I think it's all done at compile time, so this is may not be an issue for at least Linux. Brian Andreas Nilsson wrote: > Hi, > > I just read the "The ARM Architecture Version 6 (ARMv6)" whitepaper. It > seems all new v6 features can be toggled on/off so my guess is that from > an ISA point of view a working emulator solution should work on the > physical device. However there are several performance improvements > (such as ASID) to be used on armv6. > > Quoting the paper: > > "ARMv6 maintains 100% backward compatibility at the binary level for > operating > systems and applications." > > /Andreas > > _______________________________________________ > Android-virt mailing list > Android-virt at lists.cs.columbia.edu > https://lists.cs.columbia.edu/cucslists/listinfo/android-virt > >
