Re: [Xen-devel] Patch "x86/xen: Add pvh specific rsdp address retrieval function" has been added to the 4.16-stable tree

[Juergen Gross <jgross@xxxxxxxx>]

On 02/05/18 00:33, gregkh@xxxxxxxxxxxxxxxxxxx wrote:
> 
> This is a note to let you know that I've just added the patch titled
> 
>     x86/xen: Add pvh specific rsdp address retrieval function
> 
> to the 4.16-stable tree which can be found at:
>     
> http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
> 
> The filename of the patch is:
>      x86-xen-add-pvh-specific-rsdp-address-retrieval-function.patch
> and it can be found in the queue-4.16 subdirectory.
> 
> If you, or anyone else, feels it should not be added to the stable tree,
> please let <stable@xxxxxxxxxxxxxxx> know about it.
> 
> 
> From foo@baz Tue May  1 14:59:18 PDT 2018
> From: Juergen Gross <jgross@xxxxxxxx>
> Date: Mon, 19 Feb 2018 11:09:06 +0100
> Subject: x86/xen: Add pvh specific rsdp address retrieval function
> 
> From: Juergen Gross <jgross@xxxxxxxx>
> 
> [ Upstream commit b17d9d1df3c33a4f1d2bf397e2257aecf9dc56d4 ]
> 
> Add pvh_get_root_pointer() for Xen PVH guests to communicate the
> address of the RSDP table given to the kernel via Xen start info.
> 
> This makes the kernel boot again in PVH mode after on recent Xen the
> RSDP was moved to higher addresses. So up to that change it was pure
> luck that the legacy method to locate the RSDP was working when
> running as PVH mode.
> 
> Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
> Reviewed-by: Andy Shevchenko <andy.shevchenko@xxxxxxxxx>
> Acked-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
> Cc: Borislav Petkov <bp@xxxxxxxxx>
> Cc: Eric Biederman <ebiederm@xxxxxxxxxxxx>
> Cc: H. Peter Anvin <hpa@xxxxxxxxx>
> Cc: Kees Cook <keescook@xxxxxxxxxxxx>
> Cc: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
> Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
> Cc: boris.ostrovsky@xxxxxxxxxx
> Cc: lenb@xxxxxxxxxx
> Cc: linux-acpi@xxxxxxxxxxxxxxx
> Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx
> Link: http://lkml.kernel.org/r/20180219100906.14265-4-jgross@xxxxxxxx
> Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
> Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

Thanks for adding this patch.

For making it compile I think you'll need upstream commits
038bac2b02989acf1fc938cedcb7944c02672b9f and
dfc9327ab7c99bc13e12106448615efba833886b.


Juergen


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