Re: [Xen-devel] Xen 4.1 + Linux compiled with PVH == BOOM

[Mukesh Rathor <mukesh.rathor@xxxxxxxxxx>]

On Mon, 30 Dec 2013 14:56:48 -0500
Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx> wrote:

> On Tue, Dec 24, 2013 at 01:05:10PM +0000, David Vrabel wrote:
......
> > > 
> > > The elf parsing should accept unrecognised fields for forward
> > > compatibility, which would then allow a PV & PVH compiled kernel
> > > to run in PV mode.
> > 
> > It should but it doesn't, so a different way needs to be found for
> > the kernel to report (optional) PVH support.  A method that is
> > compatible with older toolstacks.
> 
> Also known as changes to the PVH ABI.
> 
> Mukesh, Roger, George (emailing Ian instead since he is now the
> Release Manager-pro-temp), Jan,
> 
> a).  That means dropping the 'hvm_callback_vector' check from
> xc_dom_core.c and just depending on:
> "writable_descriptor_tables|auto_translated_physmap|supervisor_mode_kernel"
> for PVH guests.

I"m not sure what the state of auto xlated with shadow and Ian's work
for supervisor mode kernel is. If they are obsolete, then we can drop
the hvm_callback_vector check.

thanks
mukesh


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