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From: Marcelo Tosatti <mtosatti@redhat.com>
To: Avi Kivity <avi@redhat.com>
Cc: seabios@seabios.org, qemu-devel@nongnu.org
Subject: [Qemu-devel] Re: [SeaBIOS] seabios: acpi: add _RMV control method for PCI devices
Date: Sun, 12 Dec 2010 22:00:17 -0200	[thread overview]
Message-ID: <20101213000017.GA8265@amt.cnet> (raw)
In-Reply-To: <4D032AB2.6080201@redhat.com>

On Sat, Dec 11, 2010 at 09:39:30AM +0200, Avi Kivity wrote:
> On 12/08/2010 07:08 PM, Marcelo Tosatti wrote:
> >Use _RMV method to indicate whether device can be removed.
> >
> >Data is retrieved from QEMU via I/O port 0xae0c.
> >
> 
> Where did this port come from?  

Its the next available address after "PCI EJ base", used
for QEMU<->ACPI hotplug communication.

> What's the protocol?

ACPI reads the 32-bit field indicating the return value of the _RMV
method (which is used by Windows to decide removability). 1-bit per
slot.

More ports have to be registered if more buses are added.

> Maybe we should do this via fw_cfg.

I don't see a need for it? (yes, it might be possible, but i'm not
familiar enough with AML).

  reply	other threads:[~2010-12-13  0:02 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-12-08 17:08 [Qemu-devel] seabios: acpi: add _RMV control method for PCI devices Marcelo Tosatti
2010-12-08 17:34 ` [Qemu-devel] " Gleb Natapov
2010-12-08 18:01   ` Marcelo Tosatti
2010-12-08 19:58     ` Gleb Natapov
2010-12-08 21:23       ` Marcelo Tosatti
2010-12-11  7:39 ` [Qemu-devel] Re: [SeaBIOS] " Avi Kivity
2010-12-13  0:00   ` Marcelo Tosatti [this message]
2010-12-13  8:41     ` Avi Kivity
2010-12-13  8:49       ` Gleb Natapov
2010-12-13  8:53         ` Avi Kivity
2010-12-13  9:03           ` Gleb Natapov
2010-12-13  9:10             ` Avi Kivity
2010-12-13  9:16               ` Gleb Natapov
2010-12-12 19:11 ` Kevin O'Connor
2010-12-12 19:49   ` Gleb Natapov
2010-12-12 19:57     ` Kevin O'Connor
2010-12-20  8:49       ` Marcelo Tosatti
2010-12-20  9:15         ` Avi Kivity
2010-12-20 17:05           ` Marcelo Tosatti
2010-12-20 17:44             ` Avi Kivity
2010-12-20 18:23               ` Marcelo Tosatti
2011-01-05 11:10 ` [Qemu-devel] " Gleb Natapov
2011-01-06  2:27   ` [Qemu-devel] Re: [SeaBIOS] " Kevin O'Connor

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