Re: [Qemu-devel] [PULL for-1.3 0/3] seabios: q35 update

[Jan Kiszka]

On 2012-12-04 08:40, Gerd Hoffmann wrote:
>   Hi,
> 
>> 1) legacy ide mode
>>
>> I can currently create a ide controller on the command-line using
>> '-device'. However, on the real h/w there is an IDE compatibility mode
>> which essentially advertises an ide controller at the same location that
>> the ahci lives at. In fact, it changes the PCI device id. To deal with
>> the fact that AHCI has 6 ports and thus 6 possible devices, it then adds
>> a second controller for the remaining 2 disks. This shouldn't be too
>> hard to emulate. But I'm wondering what we want the qemu interface
>> to look like? A -machine options such as:
>> '-machine q35,diskmode=ahci,ide,raid'? 
> 
> I'm wondering whenever we want to deal with that at all?
> 
> "If your guest is too old to handle ahci natively, just stick to piix."
> is a sensible policy IMHO.
> 
>> 2) HPET ACPI error
>>
>> This line: 'IRQNoFlags () {2, 8}' in the HPET acpi table is causing the
>> folloing ACPI message (removing it makes it go away):
> 
> Hmm.  That was added to make macos x happy and is also present on real
> hardware, so I'm wondering what is going on here.
> 
>> 3) irq table
>>
>> The irq table commit that makes windows 7 work, upsets Windows XP. If
>> I back out seabios commit: 2114f50148c42e374586359d23b522483ca10e8d
>> I do not get the following error:
>>
>> "
>> A problem has been detected and windows has been shut down To prevent damage
>> to your computer.
>>
>> If this is The first time you've seen this stop error screen,
>> restart your computer. If this screen appears again, follow
>> these steps:
>>
>> The BIOS in this sysTem is not fully ACPI compliant. Please contact your
>> system vendor for an updated BIOS.  If you are unable to obtain an
>> updated BIOS or the latest BIOS supplied by your vendor is not ACPI
>> compliant, you can turn off ACPI mode during textmode setup.  To do this,
>> press The F7 key when you are prompted To install storage drivers. The
>> system will not notify you that the F7 key was pressed - it will silently
>> disable ACPI and allow you to continue your installation.
>>
>> Technical informaTion:
>>
>> *** STOP: 0x000000A5 
>> (Ox0000000000010006,OxFFFFFADF9C461108,0x0000000000000000,0
>> x0000000000000000)
>> "
> 
> Jan, this is your commit, any idea?

Not really. This is looong ago. I hacked it in to make Win7 happy, but I
may not have tested WinXP by that time.

Jan

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