Revert "[PATCH] paravirt: Add startup infrastructure for paravirtualization"
commit5a18c92aab13aac7917bc87ceefa23da68698be4
authorEric W. Biederman <ebiederm@xmission.com>
Thu, 10 May 2007 10:15:36 +0000 (10 03:15 -0700)
committerLinus Torvalds <torvalds@woody.linux-foundation.org>
Thu, 10 May 2007 16:26:53 +0000 (10 09:26 -0700)
treeee03d8c6ee5d695ea4e548680ab09253f5874685
parent0cfe61e1a72b345073bb7900a7887da8541abc7a
Revert "[PATCH] paravirt: Add startup infrastructure for paravirtualization"

This reverts commit c9ccf30d77f04064fe5436027ab9d2230c7cdd94.

Entering the kernel at startup_32 without passing our real mode data in
%esi, and without guaranteeing that physical and virtual addresses are
identity mapped makes head.S impossible to maintain.

The only user of this infrastructure is lguest which is not merged so
nothing we currently support will break by removing this over designed
nightmare, and only the pending lguest patches will be affected.  The
pending Xen patches have a different entry point that they use.

We are currently discussing what Xen and lguest need to do to boot the
kernel in a more normal fashion so using startup_32 in this weird manner is
clearly not their long term direction.

So let's remove this code in head.S before it causes brain damage to people
trying to maintain head.S

Cc: Chris Wright <chrisw@sous-sol.org>
Cc: Andi Kleen <ak@suse.de>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Zachary Amsden <zach@vmware.com>
CC: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
arch/i386/kernel/head.S
arch/i386/kernel/paravirt.c
arch/i386/kernel/vmlinux.lds.S
include/asm-i386/paravirt.h