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authorBernhard Walle <bwalle@suse.de>2008-06-25 21:39:16 +0200
committerIngo Molnar <mingo@elte.hu>2008-07-08 13:15:59 +0200
commit611dfd7819e525b45f39ff15e0faf5f23551c113 (patch)
tree783d29952038b4edaec54fa63a8d437921026530 /arch/x86/kernel/e820.c
parent8207c2570af6f819b61be9ef3fb298d0a8c0e18c (diff)
x86: limit E820 map when a user-defined memory map is specified
This patch brings back limiting of the E820 map when a user-defined E820 map is specified. While the behaviour of i386 (32 bit) was to limit the E820 map (and /proc/iomem), the behaviour of x86-64 (64 bit) was not to limit. That patch limits the E820 map again for both x86 architectures. Code was tested for compilation and booting on a 32 bit and 64 bit system. Signed-off-by: Bernhard Walle <bwalle@suse.de> Acked-by: Yinghai Lu <yhlu.kernel@gmail.com> Cc: kexec@lists.infradead.org Cc: vgoyal@redhat.com Cc: Bernhard Walle <bwalle@suse.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/e820.c')
-rw-r--r--arch/x86/kernel/e820.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c
index 1dcb66533df..7b7685b7885 100644
--- a/arch/x86/kernel/e820.c
+++ b/arch/x86/kernel/e820.c
@@ -1117,6 +1117,9 @@ static int __init parse_memopt(char *p)
mem_size = memparse(p, &p);
end_user_pfn = mem_size>>PAGE_SHIFT;
+ e820_update_range(mem_size, ULLONG_MAX - mem_size,
+ E820_RAM, E820_RESERVED);
+
return 0;
}
early_param("mem", parse_memopt);
@@ -1161,6 +1164,8 @@ static int __init parse_memmap_opt(char *p)
e820_add_region(start_at, mem_size, E820_RESERVED);
} else {
end_user_pfn = (mem_size >> PAGE_SHIFT);
+ e820_update_range(mem_size, ULLONG_MAX - mem_size,
+ E820_RAM, E820_RESERVED);
}
return *p == '\0' ? 0 : -EINVAL;
}