| Date | Fri, 16 Mar 2007 10:31:45 +0100 | From | Ingo Molnar <> | Subject | Re: [patch 06/26] Xen-paravirt_ops: paravirt_ops: allocate a fixmap slot |
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* Jeremy Fitzhardinge <jeremy@goop.org> wrote:
> Allocate a fixmap slot for use by a paravirt_ops implementation. This > is intended for early-boot bootstrap mappings. Once the zones and > allocator have been set up, it would be better to use get_vm_area() to > allocate some virtual space. > > 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. It is needed early because it contains the vcpu state, > including the interrupt mask.
Acked-by: Ingo Molnar <mingo@elte.hu>
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