On Tue, Mar 15, 2016 at 8:48 PM, Andy Lutomirski <l...@amacapital.net> wrote: > > Why is it safe to rely on interrupted_kernel_fpu_idle? That function > is for interrupts, but is there any reason that KVM can't be preempted > (or explicitly schedule) with XCR0 having some funny value?
KVM restores the host's xcr0 in the sched-out preempt notifier and prior to returning to userspace.
