Messages in this thread |  | | Date | Thu, 13 Dec 2012 16:54:04 -0800 | From | "H. Peter Anvin" <> | Subject | Re: [PATCH v6 19/27] x86, boot: update comments about entries for 64bit image |
| |
On 12/13/2012 04:51 PM, Yinghai Lu wrote: > On Thu, Dec 13, 2012 at 4:44 PM, Yinghai Lu <yinghai@kernel.org> wrote: >> On Thu, Dec 13, 2012 at 4:38 PM, H. Peter Anvin <hpa@zytor.com> wrote: >>> On 12/13/2012 04:13 PM, Yinghai Lu wrote: >>> >>> It is definitely the minmum we can rely on, and so is the minimum we should >>> rely on. In fact, we don't even need .bss/.brk to be mapped, but we >>> probably should require that as a matter of protocol. >> >> in my version of arch/x86/kernel/head_64.S is using BRK to do >> ident/kernel high mapping >> for kernel that is above 4G. >> so .brk is needed. > > also need to make sure zero page and command line get ident mapping. > because arch/x86/boot/compressed/head_64.S is using them. >
... or we need to do the same kind of thing there.
-hpa
-- H. Peter Anvin, Intel Open Source Technology Center I work for Intel. I don't speak on their behalf.
|  |