Re: [Xen-devel] [PATCH v1 04/12] xen/hvmlite: Bootstrap HVMlite guest

From	"H. Peter Anvin" <hpa@zytor.com>
Newsgroups	linux.kernel
Subject	Re: [Xen-devel] [PATCH v1 04/12] xen/hvmlite: Bootstrap HVMlite guest
Date	2016-01-23 19:30 +0100
Message-ID	<qUb6G-6FS-1@gated-at.bofh.it> (permalink)
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On January 23, 2016 8:12:23 AM PST, Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> wrote:
>On January 23, 2016 11:01:06 AM EST, "H. Peter Anvin" <hpa@zytor.com>
>wrote:
>>On January 23, 2016 7:34:33 AM PST, Konrad Rzeszutek Wilk
>><konrad.wilk@oracle.com> wrote:
>>>
>>>>However, this stub belongs in Linux, not in the Xen toolstack.  That
>>>>way, when the Linux boot protocol is modified, both sides can be
>>>>updated
>>>>accordingly.
>>>
>>>I would add that this idea is borrowed from the EFI stub code that
>>>Linux has which also constructs the boot parameter structure when
>>>invoked (either from firmware or from EFI shell).
>>
>>There is a huge difference though: EFI is a widely used multivendor
>>industry standard.  You are taking about something Xen-specific, and
>>which in good Xen tradition isn't even documented, apparently (did we
>>ever get documentation for the hypervisor ABI?)
>>
>>Asking "why burden Xen with something Linux-specific" is a pretty
>>extreme case of the tail wagging the dog.
>>
>>That being said, before any code can be put anywhere, it needs to be
>>written.  We can argue where to put it later.  We went through this
>>process with the EFI stub, too: a standalone implementation (efilinux)
>>first.
>
>http://lists.xenproject.org/archives/html/xen-devel/2015-12/msg01793.html
>
>I believe is the latest version. Roger (CCed) has probably an updated
>one.

I suspect you should write a noninteractive bootloader as a reference implementation, and then consider porting Grub2 and maybe Syslinux to your ABI for those that want a full featured interactive bootloader compatible with the normal management.
-- 
Sent from my Android device with K-9 Mail. Please excuse brevity and formatting.

Thread

[PATCH v1 04/12] xen/hvmlite: Bootstrap HVMlite guest Boris Ostrovsky <boris.ostrovsky@oracle.com> - 2016-01-22 22:40 +0100
  Re: [PATCH v1 04/12] xen/hvmlite: Bootstrap HVMlite guest "Luis R. Rodriguez" <mcgrof@suse.com> - 2016-01-23 00:40 +0100
    Re: [Xen-devel] [PATCH v1 04/12] xen/hvmlite: Bootstrap HVMlite guest Andrew Cooper <andrew.cooper3@citrix.com> - 2016-01-23 01:40 +0100
      Re: [Xen-devel] [PATCH v1 04/12] xen/hvmlite: Bootstrap HVMlite guest "Luis R. Rodriguez" <mcgrof@suse.com> - 2016-01-23 01:50 +0100
      Re: [Xen-devel] [PATCH v1 04/12] xen/hvmlite: Bootstrap HVMlite guest "Luis R. Rodriguez" <mcgrof@suse.com> - 2016-01-23 02:00 +0100
        Re: [Xen-devel] [PATCH v1 04/12] xen/hvmlite: Bootstrap HVMlite guest Andrew Cooper <andrew.cooper3@citrix.com> - 2016-01-23 15:50 +0100
          Re: [Xen-devel] [PATCH v1 04/12] xen/hvmlite: Bootstrap HVMlite guest "H. Peter Anvin" <hpa@zytor.com> - 2016-01-23 17:10 +0100
            Re: [Xen-devel] [PATCH v1 04/12] xen/hvmlite: Bootstrap HVMlite guest Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> - 2016-01-23 17:20 +0100
              Re: [Xen-devel] [PATCH v1 04/12] xen/hvmlite: Bootstrap HVMlite guest "H. Peter Anvin" <hpa@zytor.com> - 2016-01-23 19:30 +0100
              Re: [Xen-devel] [PATCH v1 04/12] xen/hvmlite: Bootstrap HVMlite guest Roger Pau Monné <royger@FreeBSD.org> - 2016-01-25 11:40 +0100
          Re: [Xen-devel] [PATCH v1 04/12] xen/hvmlite: Bootstrap HVMlite guest "Luis R. Rodriguez" <mcgrof@suse.com> - 2016-01-25 23:20 +0100
            Re: [Xen-devel] [PATCH v1 04/12] xen/hvmlite: Bootstrap HVMlite guest Boris Ostrovsky <boris.ostrovsky@oracle.com> - 2016-01-26 00:00 +0100
              Re: [Xen-devel] [PATCH v1 04/12] xen/hvmlite: Bootstrap HVMlite guest "Luis R. Rodriguez" <mcgrof@suse.com> - 2016-01-26 21:40 +0100
                Re: [Xen-devel] [PATCH v1 04/12] xen/hvmlite: Bootstrap HVMlite guest Boris Ostrovsky <boris.ostrovsky@oracle.com> - 2016-01-26 23:00 +0100
                Re: [Xen-devel] [PATCH v1 04/12] xen/hvmlite: Bootstrap HVMlite guest "Luis R. Rodriguez" <mcgrof@suse.com> - 2016-01-27 01:10 +0100
                Re: [Xen-devel] [PATCH v1 04/12] xen/hvmlite: Bootstrap HVMlite guest "Luis R. Rodriguez" <mcgrof@suse.com> - 2016-01-27 03:20 +0100
                Re: [Xen-devel] [PATCH v1 04/12] xen/hvmlite: Bootstrap HVMlite guest David Vrabel <david.vrabel@citrix.com> - 2016-01-27 16:00 +0100
                Re: [Xen-devel] [PATCH v1 04/12] xen/hvmlite: Bootstrap HVMlite guest Boris Ostrovsky <boris.ostrovsky@oracle.com> - 2016-01-27 16:10 +0100
                Re: [Xen-devel] [PATCH v1 04/12] xen/hvmlite: Bootstrap HVMlite guest David Vrabel <david.vrabel@citrix.com> - 2016-01-27 16:10 +0100
                Re: [Xen-devel] [PATCH v1 04/12] xen/hvmlite: Bootstrap HVMlite guest Boris Ostrovsky <boris.ostrovsky@oracle.com> - 2016-01-27 16:20 +0100
                Re: [Xen-devel] [PATCH v1 04/12] xen/hvmlite: Bootstrap HVMlite guest Boris Ostrovsky <boris.ostrovsky@oracle.com> - 2016-01-27 17:20 +0100
                Re: [Xen-devel] [PATCH v1 04/12] xen/hvmlite: Bootstrap HVMlite guest "Luis R. Rodriguez" <mcgrof@kernel.org> - 2016-01-27 19:50 +0100
                Re: [Xen-devel] [PATCH v1 04/12] xen/hvmlite: Bootstrap HVMlite guest "Luis R. Rodriguez" <mcgrof@kernel.org> - 2016-01-27 20:10 +0100
                Re: [Xen-devel] [PATCH v1 04/12] xen/hvmlite: Bootstrap HVMlite guest Borislav Petkov <bp@suse.de> - 2016-01-27 17:20 +0100
          Re: [Xen-devel] [PATCH v1 04/12] xen/hvmlite: Bootstrap HVMlite guest Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> - 2016-01-26 17:20 +0100
      Re: [Xen-devel] [PATCH v1 04/12] xen/hvmlite: Bootstrap HVMlite guest Boris Ostrovsky <boris.ostrovsky@oracle.com> - 2016-01-25 16:10 +0100
    Re: [PATCH v1 04/12] xen/hvmlite: Bootstrap HVMlite guest Boris Ostrovsky <boris.ostrovsky@oracle.com> - 2016-01-25 17:10 +0100
      Re: [PATCH v1 04/12] xen/hvmlite: Bootstrap HVMlite guest "Luis R. Rodriguez" <mcgrof@suse.com> - 2016-01-25 22:20 +0100
        Re: [PATCH v1 04/12] xen/hvmlite: Bootstrap HVMlite guest "H. Peter Anvin" <hpa@zytor.com> - 2016-01-25 22:30 +0100
          Re: [PATCH v1 04/12] xen/hvmlite: Bootstrap HVMlite guest Boris Ostrovsky <boris.ostrovsky@oracle.com> - 2016-01-25 23:30 +0100
            Re: [PATCH v1 04/12] xen/hvmlite: Bootstrap HVMlite guest "Luis R. Rodriguez" <mcgrof@suse.com> - 2016-01-26 19:40 +0100
              Re: [PATCH v1 04/12] xen/hvmlite: Bootstrap HVMlite guest Andy Lutomirski <luto@amacapital.net> - 2016-01-26 19:50 +0100
                Re: [PATCH v1 04/12] xen/hvmlite: Bootstrap HVMlite guest Boris Ostrovsky <boris.ostrovsky@oracle.com> - 2016-01-26 20:10 +0100
                Re: [Xen-devel] [PATCH v1 04/12] xen/hvmlite: Bootstrap HVMlite guest "Luis R. Rodriguez" <mcgrof@suse.com> - 2016-01-26 20:20 +0100

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