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Date: Wed, 8 Dec 2010 21:58:35 +0200
From: Gleb Natapov <gleb@redhat.com>
Message-ID: <20101208195835.GD20507@redhat.com>
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Subject: [Qemu-devel] Re: seabios: acpi: add _RMV control method for PCI
	devices
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To: Marcelo Tosatti <mtosatti@redhat.com>
Cc: seabios@seabios.org, qemu-devel@nongnu.org, Gerd Hoffmann <kraxel@redhat.com>

On Wed, Dec 08, 2010 at 04:01:18PM -0200, Marcelo Tosatti wrote:
> On Wed, Dec 08, 2010 at 07:34:42PM +0200, Gleb Natapov wrote:
> > On Wed, Dec 08, 2010 at 03:08:59PM -0200, Marcelo Tosatti wrote:
> > > Use _RMV method to indicate whether device can be removed.
> > > 
> > But Windows still shows device as removable in the gui and allows to
> > remove it, correct?
> 
> No. From "Designing Hardware for Surprise Removal under Windows XP"
> document:
> 
> "An ACPI BIOS can override the Removable capability by using the _RMV
> method ..."
> 
Cool. I wonder how it co-exists with _EJ0 method for the same device.

> > > +#define gen_pci_device(name, nr)                                \
> > > +        Device(SL##name) {                                      \
> > > +            Name (_ADR, nr##0000)                               \
> > > +            Method (_RMV) {                                     \
> > > +                If (And(\_SB.PCI0.PCRM, ShiftLeft(1, nr))) {    \
> > > +                    Return (0x1)                                \
> > > +                }                                               \
> > > +                Return (0x0)                                    \
> > > +            }                                                   \
> > > +            Name (_SUN, name)                                   \
> > > +        }
> > Why not add this to hotplug_slot() macro?
> 
> Because its ignored if declared in the device object thats a child
> of SB.PCI0 (hotplug_slot). 
Any idea why?

--
			Gleb.