Re: [Qemu-devel] [PATCH] Add nvram to default boot device list

[Alexander Graf]

On 12.10.2012, at 02:28, David Gibson wrote:

> On Fri, Oct 12, 2012 at 02:03:00AM +0200, Alexander Graf wrote:
>> 
>> On 12.10.2012, at 00:59, David Gibson wrote:
>> 
>>> On Thu, Oct 11, 2012 at 07:34:42AM +0530, Avik Sil wrote:
>>>> This patch adds nvram specified boot device into qemu default
>>>> boot_devices list. This helps firmware to boot from nvram specified
>>>> boot device if no -boot option is specified.
>>> 
>>> I really don't think this is a good idea, it extends an already
>>> deprecated mechanism in a fuzzy way and requires careful checking to
>>> see if it could break anything.  On all platforms the boot sequence
>>> should be:
>>>     if bootindex is specified:
>>>             boot according to bootindex
>>>     else if -boot is specified:
>>>             boot according to -boot sequence
>>>     else:
>>>             use platform firmware default sequence
>>> 
>>> The last will of course vary by platform, and could depend on platform
>>> details like the contents of NVRAM.  Your original idea of making it
>>> clear to the guest when -boot has been specified (as opposed to when
>>> it contains its default value) was the right one, and this "x" in
>>> -boot is going the wrong direction.
>> 
>> Given that this is a fundamental direction for a bunch of machines,
>> how about we talk about it on the weekly QEMU call?
> 
> Uh, is this a call I know about?

I would hope so. Chris / Juan, who is in charge of the phone numbers these days?


Alex