On 12/13/2012 04:51 PM, Yinghai Lu wrote:
On Thu, Dec 13, 2012 at 4:44 PM, Yinghai Lu <ying...@kernel.org> wrote:
On Thu, Dec 13, 2012 at 4:38 PM, H. Peter Anvin <h...@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.
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