From mboxrd@z Thu Jan  1 00:00:00 1970
From: Gleb Natapov <gleb@redhat.com>
Subject: Re: system_powerdown not working for qemu-kvm 0.12.4?
Date: Tue, 12 Oct 2010 09:40:07 +0200
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Cc: "Kevin O'Connor" <kevin@koconnor.net>,
	Ruben Kerkhof <ruben@rubenkerkhof.com>,
	Teck Choon Giam <giamteckchoon@gmail.com>,
	kvm@vger.kernel.org, seabios@seabios.org
To: Avi Kivity <avi@redhat.com>
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On Tue, Oct 12, 2010 at 09:33:42AM +0200, Avi Kivity wrote:
>  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 comm=
it
> >>> > >commit 5c99b6c984682ddb1d4543a7e27a1f4ca633e6a6
> >>> > >Author: Kevin O'Connor<kevin@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 k=
vm
> >>> > implements but qemu does not)
> >>>
> >>> The only thing in commit 5c99b6c9 that could cause an issue is th=
at it
> >>> has the compiled acpi changes actually made in commit 29f4b912, b=
ut 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=
=2E
> >
> >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.
> >
>=20
> Aha! The piix4 specification updates says:
>=20
> >
> >=95 IRQ9OUT#/GPO29 should be labeled as IRQ9OUT/GPO29
>=20
> 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.
>=20
It is even stranger then that. Seabios creates interrupt override entry
for irq9 to be active high, level triggered, but it should be edge
triggered.

--
			Gleb.