Messages in this thread |  | | Date | Wed, 13 Apr 2011 11:26:44 -0700 | From | "H. Peter Anvin" <> | Subject | Re: [PATCH 2/4] x86,xen: introduce x86_init.mapping.pagetable_reserve |
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On 04/12/2011 04:19 AM, stefano.stabellini@eu.citrix.com wrote: > From: Stefano Stabellini <stefano.stabellini@eu.citrix.com> > > Introduce a new x86_init hook called pagetable_reserve that during the > initial memory mapping is used to reserve a range of memory addresses for > kernel pagetable usage. > > On native it just calls memblock_x86_reserve_range while on xen it also > takes care of setting the spare memory previously allocated > for kernel pagetable pages from RO to RW, so that it can be used for > other purposes. >
What are the *semantics* of this hook?
Hooks are insanely nasty if they are just defined by a particular code flow, as evidenced by the royal mess called paravirt_ops.
-hpa
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