Re: [Xen-devel] [PATCH] Allow direct hypercalls

[John Levon <john.levon@xxxxxxx>]

On Thu, May 01, 2008 at 04:16:33PM +0100, Ian Campbell wrote:

> On Wed, 2008-04-30 at 05:56 -0700, john.levon@xxxxxxx wrote:
> > For PV guests, there's no reason to force use of the indirect hypercall
> > mechanism. Allow it.
> 
> It was originally intended to provide some flexibility to the hypervisor
> in how hypercalls were performed, encouraging new guests to use it seems
> rather counter to this -- why do you want to use them?

There's no current advantage in using the hypercall page, nor is there
one on the horizon AFAIK. There is a (most likely small) disadvantage.

regards,
john

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