Re: [Xen-devel] [PATCH v3 3/4] * util/grub.d/20_linux_xen.in: Add support of the XEN boot on aarch64

[Vladimir 'Ï-coder/phcoder' Serbinenko <phcoder@xxxxxxxxx>]

On 30.10.2015 09:44, Fu Wei wrote:
> Hi Vladimir,
> 
> Great thanks for your suggestion! :-)
> 
> On 29 October 2015 at 23:25, Vladimir 'Ï-coder/phcoder' Serbinenko
> <phcoder@xxxxxxxxx> wrote:
>>> +if [ "x$machine" != xaarch64 ]; then
>>> +     multiboot_cmd="multiboot"
>>> +     module_linux_cmd="module"
>>> +     module_initrd_cmd="module --nounzip"
>>> +else
>>> +     multiboot_cmd="xen_hypervisor"
>>> +     module_linux_cmd="xen_linux"
>>> +     module_initrd_cmd="xen_initrd"
>>> +fi
>>> +
>> Please do not hardcode an assumption that grub-mkconfig is executed on
>> the same machine as GRUB is booted. I know that we have instances of
>> such assumption in some cases but we'd like to eliminate them. Alternatives:
>> - Check arch on boot time
> 
> 
>> - Check that new xen commands are supported (define a new feature)
>> Please add xen_* aliases on x86 as well
> I would like to go this way, but could you provide some help or a
> little example for :
> (1) How to check the new xen commands(or xen_boot module)
> (2)add xen_* aliases on x86, is that like something below?
> 
see grub-core/normal/main.c the features array.
> diff --git a/grub-core/loader/i386/xen.c b/grub-core/loader/i386/xen.c
> index c4d9689..b88d51b 100644
> --- a/grub-core/loader/i386/xen.c
> +++ b/grub-core/loader/i386/xen.c
> @@ -696,10 +696,14 @@ GRUB_MOD_INIT (xen)
>                                    0, N_("Load Linux."));
>    cmd_multiboot = grub_register_command ("multiboot", grub_cmd_xen,
>                                          0, N_("Load Linux."));
> +  cmd_multiboot = grub_register_command ("xen_hypervisor", grub_cmd_xen,
> +                                        0, N_("Load Linux."));
>    cmd_initrd = grub_register_command ("initrd", grub_cmd_initrd,
>                                       0, N_("Load initrd."));
>    cmd_module = grub_register_command ("module", grub_cmd_module,
>                                       0, N_("Load module."));
> +  cmd_module = grub_register_command ("xen_linux", grub_cmd_module,
> +                                     0, N_("Load module."));
>    my_mod = mod;
>  }
> 
> But how to deal with xen_initrd ?
> Could you help me ?
> 
Just another alias to module. Possibly you might want to add a code to
xen_initrd tto check that xen_linux was already run
> Great thanks !!
> 
>>
>>
> 
> 
>

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