[Xen-devel] RE: [PATCH 1/2] Writable pagetable support for x86_64 xenlinux (xen part)

["Nakajima, Jun" <jun.nakajima@xxxxxxxxx>]

Now _SMP_ x86_64 kernel works fine with writable pagetable!

This _additional_ patch ptwr-smp.patch (just a single line change,
effectively + minor bug fix) is required to get SMP kernel working. The
first patch (ptwr-xen.patch) is also attached for convenience. Once
these two are (ptwr-xen.patch & ptwr-smp.patch) applied to Xen, the
patch  for x86_64 xenlinux (already sent) is required to activate
writable pagetable.

One ugly code that I don't like is __not_mapped(l2_pgentry_t *pl2e). Any
idea for doing it better? 

I used a patch from Chris/Xin for the x86_64 SMP kernel. Probably he has
more updates there.

Nakajima, Jun wrote:
> Attached is a patch to xen. I would like thank Ian/Keir for the
> design suggestions. 
> 
>  arch/x86/audit.c              |   62 ++++++----
>  arch/x86/domain.c             |    6 -
>  arch/x86/mm.c                 |  238
>  ++++++++++++++++++++++++++++++------------ arch/x86/shadow32.c      
>  |    2 arch/x86/shadow_public.c      |    6 -
>  arch/x86/traps.c              |   11 +
>  common/grant_table.c          |    2
>  include/asm-x86/mm.h          |   28 +++-
>  include/asm-x86/page.h        |   27 ++--
>  include/asm-x86/shadow.h      |   13 +-
>  include/asm-x86/x86_64/page.h |    3
>  11 files changed, 271 insertions(+), 127 deletions(-)
> 
> Signed-off-by: Jun Nakajima <jun.nakajima@xxxxxxxxx>
> 
> Jun
> ---
> Intel Open Source Technology Center


Jun
---
Intel Open Source Technology Center

ptwr-smp.patch
Description: ptwr-smp.patch

ptwr-xen.patch
Description: ptwr-xen.patch

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