On 11/17/2012 04:44 PM, Yinghai Lu wrote:
On Sat, Nov 17, 2012 at 12:04 PM, Yinghai Lu <[email protected]> wrote:
On Sat, Nov 17, 2012 at 12:25 AM, Eric W. Biederman
<[email protected]> wrote:
then for setup data (boot param) and command line, we have to set extra ident
mapping for them in kernel arch/x86/kernel/head_64.S
find the solution for this one:
We don't need to set ident map for boot_param and command line in head_64.S
as we already get arch/x86/kernel/head64.c, and could use
early_ioremap to access
and copy them out.
I don't think that is feasible; we need access to this structure
extremely early. I think if you're using the 64-bit entry point it has
to be an entry condition that those structures are mapped. It simply
becomes a precondition for using the 64-bit entry point.
-hpa
--
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel. I don't speak on their behalf.
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