On 03/08/17 at 03:47pm, Baoquan He wrote: > EFI allocate runtime services regions down from EFI_VA_START, -4G. > It should be top-down handling. > > Signed-off-by: Baoquan He <b...@redhat.com> > --- > arch/x86/platform/efi/efi_64.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/arch/x86/platform/efi/efi_64.c b/arch/x86/platform/efi/efi_64.c > index a4695da..6cbf9e0 100644 > --- a/arch/x86/platform/efi/efi_64.c > +++ b/arch/x86/platform/efi/efi_64.c > @@ -47,7 +47,7 @@ > #include <asm/pgalloc.h> > > /* > - * We allocate runtime services regions bottom-up, starting from -4G, i.e. > + * We allocate runtime services regions top-down, starting from -4G, i.e.
Baoquan, I think original bottom-up is right, it is just considering -68G as up, see the x86_64 mm.txt. We regard vmalloc as higher address although from mathematics view it is lower then positive addresses. > * 0xffff_ffff_0000_0000 and limit EFI VA mapping space to 64G. > */ > static u64 efi_va = EFI_VA_START; > -- > 2.5.5 > Thanks Dave
