From be5bf9fa1c327fa6fd6e7ba44665437dd558dfe3 Mon Sep 17 00:00:00 2001 From: Jeremy Fitzhardinge <jeremy@goop.org> Date: Mon, 16 Jun 2008 14:54:46 -0700 Subject: [PATCH] xen: reserve Xen-specific memory in e820 map 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> --- arch/x86/xen/setup.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c index a29575803204..dc2ca8ad3603 100644 --- a/arch/x86/xen/setup.c +++ b/arch/x86/xen/setup.c @@ -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"; } -- GitLab