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xen64: defer setting pagetable alloc/release ops 

We need to wait until the page structure is available to use the
proper pagetable page alloc/release operations, since they use struct
page to determine if a pagetable is pinned.

This happened to work in 32bit because nobody allocated new pagetable
pages in the interim between xen_pagetable_setup_done and
xen_post_allocator_init, but the 64-bit kenrel needs to allocate more
pagetable levels.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Jeremy Fitzhardinge 2008-07-08 15:06:57 -07:00 committed by Ingo Molnar
parent 4560a2947e
commit 8745f8b0b9
1 changed files with 12 additions and 13 deletions
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25
arch/x86/xen/enlighten.c
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@ -878,6 +878,18 @@ void xen_setup_shared_info(void)
static __init void xen_pagetable_setup_done(pgd_t *base)
{
xen_setup_shared_info();
}
static __init void xen_post_allocator_init(void)
{
pv_mmu_ops.set_pte = xen_set_pte;
pv_mmu_ops.set_pmd = xen_set_pmd;
pv_mmu_ops.set_pud = xen_set_pud;
#if PAGETABLE_LEVELS == 4
pv_mmu_ops.set_pgd = xen_set_pgd;
#endif
/* This will work as long as patching hasn't happened yet
(which it hasn't) */
pv_mmu_ops.alloc_pte = xen_alloc_pte;
@ -889,19 +901,6 @@ static __init void xen_pagetable_setup_done(pgd_t *base)
pv_mmu_ops.release_pud = xen_release_pud;
#endif
pv_mmu_ops.set_pte = xen_set_pte;
xen_setup_shared_info();
}
static __init void xen_post_allocator_init(void)
{
pv_mmu_ops.set_pmd = xen_set_pmd;
pv_mmu_ops.set_pud = xen_set_pud;
#if PAGETABLE_LEVELS == 4
pv_mmu_ops.set_pgd = xen_set_pgd;
#endif
xen_mark_init_mm_pinned();
}