diff options
| author | Bernhard Walle <bwalle@suse.de> | 2008-06-25 21:39:16 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-07-08 13:15:59 +0200 |
| commit | 611dfd7819e525b45f39ff15e0faf5f23551c113 (patch) | |
| tree | 783d29952038b4edaec54fa63a8d437921026530 /arch/x86 | |
| parent | 8207c2570af6f819b61be9ef3fb298d0a8c0e18c (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')
| -rw-r--r-- | arch/x86/kernel/e820.c | 5 |
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; } |