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xen: reserve Xen-specific memory in e820 map

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Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: the arch/x86 maintainers <x86@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: Yinghai Lu <yhlu.kernel@gmail.com>

Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Jeremy Fitzhardinge 2008-06-16 14:54:46 -07:00 committed by Ingo Molnar
parent d52d53b8a5
commit be5bf9fa1c
1 changed files with 13 additions and 0 deletions
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13
arch/x86/xen/setup.c
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@ -40,9 +40,22 @@ char * __init xen_memory_setup(void)
max_pfn = min(MAX_DOMAIN_PAGES, max_pfn);
e820.nr_map = 0;
e820_add_region(0, LOWMEMSIZE(), E820_RAM);
e820_add_region(HIGH_MEMORY, PFN_PHYS(max_pfn)-HIGH_MEMORY, E820_RAM);
/*
* Reserve Xen bits:
* - mfn_list
* - xen_start_info
* See comment above "struct start_info" in <xen/interface/xen.h>
*/
e820_add_region(__pa(xen_start_info->mfn_list),
xen_start_info->pt_base - xen_start_info->mfn_list,
E820_RESERVED);
sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
return "Xen";
}