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Re: [Qemu-devel] [PATCH] Add nvram to default boot device list
From: |
Avik Sil |
Subject: |
Re: [Qemu-devel] [PATCH] Add nvram to default boot device list |
Date: |
Tue, 16 Oct 2012 09:14:21 +0530 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:15.0) Gecko/20120911 Thunderbird/15.0.1 |
On 10/12/2012 05:33 AM, 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?
>
Was there any discussion on this in the last QEMU call?
Regards,
Avik
Re: [Qemu-devel] [PATCH] Add nvram to default boot device list, Avik Sil, 2012/10/12