Re: 64-bit PV and Meltdown

[Thor Lancelot Simon <tls%panix.com@localhost>]

On Wed, Jan 24, 2018 at 11:15:45AM -0500, Brian Marcotte wrote:
> > > Can anyone confirm this is the case with a NetBSD guest (64-bit PV)?
> > 
> > Sure.
> > In fact, Xen 86-64 PV guests have separate user/kernel spaces since
> > day one (because the kernel also runs unprivileged)...
> 
> Excellent. I have a bunch of 32-bit NetBSD guests, so it looks like the
> quickest thing to do for those is to run them with a 64-bit NetBSD kernel
> on a Xen with PTI.

You will be giving the netbsd32 compat code a real workout.  It's had that
on other platforms but not so much on x86.  I know I and others will be
glad to help address any issues ASAP.

-- 
  Thor Lancelot Simon	                                     tls%panix.com@localhost
 "The two most common variations translate as follows:
	illegitimi non carborundum = the unlawful are not silicon carbide
	illegitimis non carborundum = the unlawful don't have silicon carbide."