[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Qemu-devel] E1000 emulation in qemu and pci configuration space
|
From: |
Stefan Hajnoczi |
|
Subject: |
Re: [Qemu-devel] E1000 emulation in qemu and pci configuration space |
|
Date: |
Mon, 5 May 2014 14:30:07 +0200 |
|
User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Mon, May 05, 2014 at 02:15:05PM +0500, Ayaz Akram wrote:
> Does e1000's emulation in QEMU require that the guest set its base address
> register(pci configuration space register) or qemu has default value for
> its base address register?
There is no default.
Drivers for some operating systems (Mac OS X?) may assume the device
state set up by the firmware (UEFI). It's nasty to do that but it
happens. Since QEMU's firmware is different from that on real machines
a hack may be necessary to make the guest OS driver work. That hack
shouldn't be in QEMU's device emulation code though - putting it into
the guest firmware is closest to how the physical machine works.
Stefan