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xen: make phys_to_machine structure dynamic

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We now support the use of memory hotplug, so the physical to machine
page mapping structure must be dynamic.  This is implemented as a
two-level radix tree structure, which allows us to efficiently
incrementally allocate memory for the p2m table as new pages are
added.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Jeremy Fitzhardinge
2008-05-26 23:31:18 +01:00
committed by Thomas Gleixner
parent 955d6f1778
commit d451bb7aa8
5 changed files with 94 additions and 17 deletions
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2
arch/x86/xen/enlighten.c
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@ -1221,7 +1221,7 @@ asmlinkage void __init xen_start_kernel(void)
/* Get mfn list */
if (!xen_feature(XENFEAT_auto_translated_physmap))
phys_to_machine_mapping = (unsigned long *)xen_start_info->mfn_list;
xen_build_dynamic_phys_to_machine();
pgd = (pgd_t *)xen_start_info->pt_base;