diff options
| author | Daniel Kiper <dkiper@net-space.pl> | 2011-05-11 22:34:38 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-06-03 09:32:45 +0900 |
| commit | 0fa5814524bb6c60fdc28915f367d8a5aa2b72c4 (patch) | |
| tree | 95ddd0fb231c3d507c8979a080330da21ddeeb3d | |
| parent | da115763a03d730d374b5105fb5ded0c90b3329e (diff) | |
xen/setup: Fix for incorrect xen_extra_mem_start initialization under 32-bit
commit 0f16d0dfcdb5aab97d9e368f008b070b5b3ec6d3 upstream.
git commit 24bdb0b62cc82120924762ae6bc85afc8c3f2b26 (xen: do not create
the extra e820 region at an addr lower than 4G) does not take into
account that ifdef CONFIG_X86_32 instead of e820_end_of_low_ram_pfn()
find_low_pfn_range() is called (both calls are from arch/x86/kernel/setup.c).
find_low_pfn_range() behaves correctly and does not require change in
xen_extra_mem_start initialization. Additionally, if xen_extra_mem_start
is initialized in the same way as ifdef CONFIG_X86_64 then memory hotplug
support for Xen balloon driver (under development) is broken.
Signed-off-by: Daniel Kiper <dkiper@net-space.pl>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | arch/x86/xen/setup.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c index 90bac0aac3a..721f5760783 100644 --- a/arch/x86/xen/setup.c +++ b/arch/x86/xen/setup.c @@ -227,7 +227,11 @@ char * __init xen_memory_setup(void) memcpy(map_raw, map, sizeof(map)); e820.nr_map = 0; +#ifdef CONFIG_X86_32 + xen_extra_mem_start = mem_end; +#else xen_extra_mem_start = max((1ULL << 32), mem_end); +#endif for (i = 0; i < memmap.nr_entries; i++) { unsigned long long end; |