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Re: [PATCH v2 3/3] x86/PVH: Support relocatable dom0 kernels
- To: Jason Andryuk <jason.andryuk@xxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Thu, 14 Mar 2024 14:21:48 +0100
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- Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, George Dunlap <george.dunlap@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Thu, 14 Mar 2024 13:21:55 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 13.03.2024 20:30, Jason Andryuk wrote:
> --- a/xen/include/public/elfnote.h
> +++ b/xen/include/public/elfnote.h
> @@ -194,6 +194,17 @@
> */
> #define XEN_ELFNOTE_PHYS32_ENTRY 18
>
> +/*
> + * Physical loading constraints for PVH kernels
> + *
> + * Used to place constraints on the guest physical loading addresses and
> + * alignment for a PVH kernel. This note's value is 3 64bit values in
> + * the following order: minimum, maximum and alignment.
Along the lines of what I said on another sub-thread, I think at least
alignment wants to be optional here. Perhaps, with max going first, min
could also be optional.
As indicated in different context by Roger, the values being uniformly
64-bit ones also is questionable.
> + * The presence of this note indicates the kernel is relocatable.
I think it wants making explicit here that the act of relocating is still
left to the kernel.
Jan
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