[SeaBIOS] system_powerdown not working for qemu-kvm 0.12.4?

[Avi Kivity]

  On 10/12/2010 09:25 AM, Avi Kivity wrote:
> On 10/12/2010 09:14 AM, Gleb Natapov wrote:
>> On Tue, Oct 12, 2010 at 03:11:24AM -0400, Kevin O'Connor wrote:
>> > On Tue, Oct 12, 2010 at 08:49:58AM +0200, Avi Kivity wrote:
>> > > On 10/11/2010 07:53 PM, Ruben Kerkhof wrote:
>> > > >5c99b6c984682ddb1d4543a7e27a1f4ca633e6a6 is the first bad commit
>> > > >commit 5c99b6c984682ddb1d4543a7e27a1f4ca633e6a6
>> > > >Author: Kevin O'Connor<kevin at koconnor.net>
>> > > Gleb, Kevin, any ideas?
>> > >
>> > > (summary: qemu-kvm doesn't acpi shutdown freebsd 8.1 with this
>> > > commit; qemu.git does. May be due to interrupt polarity which kvm
>> > > implements but qemu does not)
>> >
>> > The only thing in commit 5c99b6c9 that could cause an issue is that it
>> > has the compiled acpi changes actually made in commit 29f4b912, but I
>> > don't see how that would be a problem to reboots:
>> >
>> It makes line 0 of device 1 to be active low instead of active high.
>
> Correctly, according to the documentation (the line is marked 
> IRQ9OUT#, which indicates it's active low, though that isn't set down 
> elsewhere).
>
> Qemu however emulates it as active high. Other guests work, which is 
> wierd.
>

Aha! The piix4 specification updates says:

>
> • IRQ9OUT#/GPO29 should be labeled as IRQ9OUT/GPO29

So it looks like it should be active high, and seabios is wrong in 
listing it as active low. Perhaps other OSes have quirks to force it to 
active high.

-- 
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.