Messages in this thread Patch in this message | | | Date | Mon, 25 Nov 2013 16:47:02 +0800 | From | dyoung@redhat ... | Subject | efi: reserve boot service fix |
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Current code check boot service region with kernel text region by: start+size >= __pa_symbol(_text) The end of the above region should be start + size - 1 instead.
I see this problem in ovmf + Fedora 19 grub boot: text start: 1000000 md start: 800000 md size: 800000
Signed-off-by: Dave Young <dyoung@redhat.com> Acked-by: Borislav Petkov <bp@suse.de> Acked-by: Toshi Kani <toshi.kani@hp.com> --- arch/x86/platform/efi/efi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- linux-2.6.orig/arch/x86/platform/efi/efi.c +++ linux-2.6/arch/x86/platform/efi/efi.c @@ -438,7 +438,7 @@ void __init efi_reserve_boot_services(vo * - Not within any part of the kernel * - Not the bios reserved area */ - if ((start+size >= __pa_symbol(_text) + if ((start + size > __pa_symbol(_text) && start <= __pa_symbol(_end)) || !e820_all_mapped(start, start+size, E820_RAM) || memblock_is_region_reserved(start, size)) {
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