Re: [PATCH v2 4/4] arm64: update the introduction of xen boot commands in docs/grub.texi

[Fu Wei <fu.wei@linaro.org>]

On 26 February 2016 at 22:03, Vladimir 'φ-coder/phcoder' Serbinenko
<phcoder@gmail.com> wrote:
> On 26.02.2016 12:15, Fu Wei wrote:
>> Hi Andrei,
>>
>> On 26 February 2016 at 18:50, Andrei Borzenkov <arvidjaar@gmail.com> wrote:
>>> On Fri, Feb 26, 2016 at 8:59 AM, Fu Wei <fu.wei@linaro.org> wrote:
>>>>>>>> +@subsection xen_module
>>>>>>>>
>>>>>>>> -@deffn Command xen_linux file [arguments]
>>>>>>>> -Load a dom0 kernel image for xen hypervisor at the booting process of xen.
>>>>>>>> +@deffn Command xen_module [--nounzip] file [arguments]
>>>>>>>> +Load a module for xen hypervisor at the booting process of xen.
>>>>>>>> The rest of the line is passed verbatim as the module command line.
>>>>>>>> +Each module will be identified by the order in which the modules are added.
>>>>>>>> +The 1st module: dom0 kernel image
>>>>>>>> +The 2nd module: dom0 ramdisk
>>>>>>>> +All subsequent modules: UNKNOW
>>>>>>>> @end deffn
>>>>>>>
>>>>>>> Hmm ... from previous discussion I gathered that Xen can detect module
>>>>>>> type. What if there is no initrd for dom0? How can subsequent modules be
>>>>>>
>>>>>> Now , Xen detect module type by the order. (at least on ARM64).
>>>>>> I think i386 is using Multiboot(2) protocol, so maybe this order is
>>>>>> nothing to do with i386.
>>>>>>
>>>>>
>>>>> Then we have obvious problem with your XSM patch (http://savannah.gnu.org/bugs/?43420) - XSM may land as the first module. That's actually something to solve on Xen side I think. It's just that so far we had just kernel and initrd, so that was non issue.
>>>>
>>>> Oh, did you mean Wei Liu's patch?
>>>>
>>>> I guess XSM may land as the third module (or the module after linux
>>>> kernel, if you don't have initrd)
>>>>
>>>> Yes, agree. (That's actually something to solve on Xen side)
>>>>
>>>> I guess xen can get xsm from a special initrd. so for now there is not
>>>> big problem on xsm.
>>>>
>>>> Please correct me if I misunderstand something. :-)
>>>>
>>>> Thanks!
>>>>
>>>> Back to this patch, is that OK for you, or any suggestion?  Thanks !
>>>>
>>>
>>> Yes, as this is dedicated Xen loader we should document this mandatory
>>> order - first module must be kernel image, second module must be
>>> initrd. I do not think we need to mention possibility to load more
>>> than two modules until there is clear understanding how it can be done
>>> without initrd.
>>
>> Great thanks for your review, I have updated and sent the v3 patchset,
>> Hope I understood your suggestion correctly, Please check.  :-)
>>
> Your patches look fine. Let's wait for Andrei's opinion but I'm leaning
> to commit them

Hi Vladimir,
Great thanks for your review, :-)

Hi Andrei,
Do you have any suggestion for my v3 patchset?
Please let me know if I can do anything to improve it. Thanks! :-)

>>
>>
>
>



-- 
Best regards,

Fu Wei
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