On Thu, Jul 20, 2017 at 05:36:56PM +1000, Benjamin Herrenschmidt wrote:
> There's a somewhat architectural issue with Radix MMU and KVM.
>
> When coming out of a guest with AIL (ie, MMU enabled), we start
> executing hypervisor code with the PID register still containing
> whatever the guest has
There's a somewhat architectural issue with Radix MMU and KVM.
When coming out of a guest with AIL (ie, MMU enabled), we start
executing hypervisor code with the PID register still containing
whatever the guest has been using.
The problem is that the CPU can (and will) then start prefetching
or
