Re: [patch 06/26] Xen-paravirt_ops: paravirt_ops: allocate a fixmap slot
From: Ingo Molnar
Date: Tue Feb 27 2007 - 05:19:17 EST
* Jeremy Fitzhardinge <jeremy@xxxxxxxx> wrote:
> Allocate a fixmap slot for use by a paravirt_ops implementation. Xen
> uses this to map the hypervisor's shared info page, which doesn't have
> a pseudo-physical page number, and therefore can't be mapped
> ordinarily.
why not vmalloc it on the guest side? fixmaps are bad for this purpose
for a general paravirt implementation, it limits the size of the shared
info page, etc.
Ingo
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