Re: [Xen-devel] [PATCH v4 06/12] xen/arm: compile and initialize vmap

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

On Fri, 26 Apr 2013, Ian Campbell wrote:
> On Fri, 2013-04-26 at 16:28 +0100, Stefano Stabellini wrote:
> > Rename EARLY_VMAP_VIRT_END and EARLY_VMAP_VIRT_START to
> > VMAP_VIRT_END and VMAP_VIRT_START.
> > 
> > Defining VMAP_VIRT_START triggers the compilation of common/vmap.c.
> > 
> > Define PAGE_HYPERVISOR and MAP_SMALL_PAGES (unused on ARM, because we
> > only support 4K pages so as a matter of fact it is always set).
> > 
> > Implement map_pages_to_xen and destroy_xen_mappings.
> > 
> > Call vm_init from start_xen.
> > 
> > Changes in v4:
> > - remove flush_tlb_local() from create_xen_entries;
> 
> Do you think the related one in create_p2m can go too?

No, because the flush in create_p2m is the only flush present in that
function, and because we change p2m mappings there, we need to make sure
that the guest doesn't keep accessing the old ones.

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