Re: [Xen-devel] [PATCH v2 3/3] paravirt: rename paravirt_enabled to paravirt_legacy

[Boris Ostrovsky]

On 02/08/2016 11:35 AM, Borislav Petkov wrote:
> On Mon, Feb 08, 2016 at 11:31:04AM -0500, Boris Ostrovsky wrote:
> > I think we are OK for PV because this code will be executed after pvops are
> > set and so we will be calling xen_cpuid().
> Not for the early loader - it is too early for pvops then. So you're
> saying something like that won't work?

Keep in mind that Xen PV doesn't go through startup_32|64(). It starts 
at xen_start_kernel (save for a small stub before that), which sets 
pvops.  It "joins" regular/baremetal code in 
i386_start_kernel/x86_64_start_reservation().

-boris