Re: [GRUB2 PATCH v3 1/4] i386/relocator: Add grub_relocator64_efi relocator

From: Daniel Kiper <daniel.kiper@oracle.com>
To: Vladimir 'phcoder' Serbinenko <phcoder@gmail.com>
Cc: "jgross@suse.com" <jgross@suse.com>,
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Subject: Re: [GRUB2 PATCH v3 1/4] i386/relocator: Add grub_relocator64_efi relocator
Date: Fri, 11 Mar 2016 17:40:53 +0100	[thread overview]
Message-ID: <20160311164053.GE3500@olila.local.net-space.pl> (raw)
In-Reply-To: <CAEaD8JN3q0Pj7xiWmzyCcKDgdS9_UW0jCJpP8ws-EOiMNNvo1A@mail.gmail.com>

On Fri, Mar 11, 2016 at 04:42:27PM +0100, Vladimir 'phcoder' Serbinenko wrote:
> On Friday, March 11, 2016, Daniel Kiper <daniel.kiper@oracle.com> wrote:
>
> > On Thu, Mar 10, 2016 at 09:23:23PM +0100, Vladimir 'phcoder' Serbinenko
> > wrote:
> > > On Wednesday, March 2, 2016, Daniel Kiper <daniel.kiper@oracle.com
> > <javascript:;>> wrote:
> > >
> > > > Add grub_relocator64_efi relocator. It will be used on EFI 64-bit
> > platforms
> > > > when multiboot2 compatible image requests MULTIBOOT_TAG_TYPE_EFI_BS.
> > > > Relocator
> > > > will set lower parts of %rax and %rbx accordingly to multiboot2
> > > > specification.
> > > > On the other hand processor mode, just before jumping into loaded
> > image,
> > > > will
> > > > be set accordingly to Unified Extensible Firmware Interface
> > Specification,
> > > > Version 2.4 Errata B, section 2.3.4, x64 Platforms, boot services.
> > This way
> > > > loaded image will be able to use EFI boot services without any issues.
> > > >
> > > > If idea is accepted I will prepare grub_relocator32_efi relocator too.
> >
> > OK, as I can see idea in general is accepted. Do you want
> > grub_relocator32_efi in 2.02 or 2.03 is OK?
> >
> Is there already a user for it? Or someone who is expected to adopt it
> shortly?

I have not heard anything about that. So, safely we can defer it to 2.03.
We should just reserve relevant numbers for required constants and say
somewhere that this feature is not implemented yet.

Daniel

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