Re: [Qemu-devel] [PATCH] Add pvevent device driver

[Gleb Natapov <gleb@redhat.com>]

On Thu, Mar 14, 2013 at 05:33:19PM +0800, Hu Tao wrote:
> On Thu, Mar 14, 2013 at 10:57:18AM +0200, Gleb Natapov wrote:
> > On Thu, Mar 14, 2013 at 04:48:47PM +0800, Hu Tao wrote:
> > > pvevent device is used to notify host(qemu) when guest panic
> > > happens.
> > > 
> > > ref: http://lists.nongnu.org/archive/html/qemu-devel/2013-03/msg02293.html
> > > 
> > > Signed-off-by: Hu Tao <hutao@cn.fujitsu.com>
> > > ---
> > >  src/acpi-dsdt-isa.dsl | 30 ++++++++++++++++++++++++++++++
> > >  1 file changed, 30 insertions(+)
> > > 
> > > diff --git a/src/acpi-dsdt-isa.dsl b/src/acpi-dsdt-isa.dsl
> > > index 23761db..d083245 100644
> > > --- a/src/acpi-dsdt-isa.dsl
> > > +++ b/src/acpi-dsdt-isa.dsl
> > > @@ -99,4 +99,34 @@ Scope(\_SB.PCI0.ISA) {
> > >              IRQNoFlags() { 3 }
> > >          })
> > >      }
> > > +
> > > +    Device(PEVT) {
> > > +        Name(_HID, "MSFT0001")
> > We cannot use MSFT!
> 
> OK, I see now, we have to use QEMU0001 or like. More question: if I
> request ACPI ID: QEMU  from pnpid@microsoft.com, who should be CCed,
> Anthony, qemu-list or any others?
> 
Cannot really answer that. I do not think mailing list should be
included. My be Anthony should request the ID on behalf of QEMU project.

> 
> > 
> > > +        OperationRegion(PEOR, SystemIO, 0x0505, 0x01)
> > IO port should be received form QEMU by fw_cfg and patched here at run time.
> 
> If I'm right, io port can be passed to seabios through fw_cfg file
> interface, but I'm still figuring out how to patch DSDT here and below at
> run time.  Maybe build_ssdt() is close to this.
> 
Yes, we already are doing similar things in build_ssdt().

--
			Gleb.