Re: [Xen-ia64-devel] [patch 00/15] ia64: kexec: Map EFI memory in the same location as Linux v20080715

[Isaku Yamahata <yamahata@xxxxxxxxxxxxx>]

I think that EFI mapping patch set are in quite good shape.
Has anyone tested? (except Simon and me).
If no objection, I'm going to merge this patches and include 
this into the next release.

To be honest, I'm having an issue that kexec succeeds in calling
into kexec code (at least relocate_kernel in xen), but a new kernel
(or VMM) doesn't boot up with some particular combinations.
However that seems to be the issue of kexec itself, not EFI mapping.
And kexec part had already been merged.

On Tue, Jul 15, 2008 at 10:35:15AM +1000, Simon Horman wrote:
> Hi,
> 
> This series is what I believe to be a fairly complete set of patches to map
> EFI memory into the same location that Linux does.  The memory is protected
> by an RID so that it doesn't conflict with domain memory - which also
> protects it from malicious access from HVM domains.
> 
> The primary motivation for this is that EFI memory can only be mapped once
> - a restriction in the EFI specification. Thus for kexec betwen Xen and
> Linux, inluding kdump of Xen (into Linux), EFI memory needs to be mapped in
> the same location in both Xen and Linux.
> 
> 
> This new series only maps PAL code when making EFI, PAL or SAL calls.
> 
> I have tested these patches on a RX 2620.
> I am hoping for more reviews and tests :-)
> 
> I recommend testing these patches using:
> 
>   Xen
>   http://xenbits.xensource.com/ext/ia64/xen-unstbale.hg
>   Revision: 17943:eb0fc71cfc72
> 
>   Linux-Xen
>   http://xenbits.xensource.com/ext/ia64/linux-2.6.18-xen.hg
>   Revision: 583:3643a33de277
> 
>   Kexec-Tools
>   git://git.kernel.org/pub/scm/linux/kernel/git/horms/kexec-tools-testing.git
>   Revision: 94afdd9f7ab2b07997f80a297741842f9cdbdc25
> 
>   Linux
>   Revision: 2.6.25-rc3
> 

-- 
yamahata

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