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Commit be5bf9fa authored by Jeremy Fitzhardinge's avatar Jeremy Fitzhardinge Committed by Ingo Molnar
Browse files

xen: reserve Xen-specific memory in e820 map 



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

Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent d52d53b8

arch/x86/xen/setup.c

+13 −0
Original line number Diff line number Diff line
@@ -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";

}