On Mon, Feb 10, 2020 at 02:13:19PM +0000, Marc Zyngier wrote: > KVM/arm was merged just over 7 years ago, and has lived a very quiet > life so far. It mostly works if you're prepared to deal with its > limitations, it has been a good prototype for the arm64 version, > but it suffers a few problems: > > - It is incomplete (no debug support, no PMU) > - It hasn't followed any of the architectural evolutions > - It has zero users (I don't count myself here) I tend to use it to test that it still works, but that's it. > - It is more and more getting in the way of new arm64 developments To echo this last point, we're currently looking at the possibility of using KVM to isolate VMs from the host in Android. The scope of the changes we think we'll have to make would mean effectively duplicating the existing code for 32-bit or implementing a whole load of unused and untested functionality to keep the current structure. Neither of these options are particularly satisfactory from a maintainance point of view, so removing the 32-bit code if it doesn't have any significant use would be welcomed: Acked-by: Will Deacon <will@xxxxxxxxxx> Will
