Re: [Qemu-devel] Re: [PATCH 2/3] qemu: make cirrus init value pci spec compliant

[Michael S. Tsirkin]

On Sun, Oct 11, 2009 at 04:53:39PM +0200, Avi Kivity wrote:
> On 10/11/2009 04:44 PM, Michael S. Tsirkin wrote:
>> On Sun, Oct 11, 2009 at 04:42:27PM +0200, Avi Kivity wrote:
>>    
>>> On 10/11/2009 04:35 PM, Michael S. Tsirkin wrote:
>>>      
>>>> No, this is not how it works, I think.
>>>> Currently BIOS ROM is loaded only on init, directly into qemu memory.
>>>>
>>>>        
>>> If we change it we break in-place upgrades - install qemu, run guest,
>>> upgrade qemu, reboot guest - now the old qemu runs with a new bios which
>>> may or may not work.
>>>      
>> Sorry, could not parse this.
>> If you upgraded qemu, you are running with new qemu with new bios?
>>    
>
> The guest is running during the upgrade, so the qemu executable is still  
> from the old install (but deleted).

Oh, I don't think we should re-read it from file each time.
We could read it at startup, keep a copy around for reboots.

> -- 
> error compiling committee.c: too many arguments to function