From: Stefan Hajnoczi <stefanha@gmail.com>
To: Ayaz Akram <aaqemu@gmail.com>
Cc: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] E1000 emulation in qemu and pci configuration space
Date: Mon, 5 May 2014 14:30:07 +0200 [thread overview]
Message-ID: <20140505123007.GH16173@stefanha-thinkpad.redhat.com> (raw)
In-Reply-To: <CAC0+NVb_Jx79BSHNA76Xg2-oRsJcm6AR+WFhu=ghqvnJX0-26Q@mail.gmail.com>
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
next prev parent reply other threads:[~2014-05-05 12:30 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-05 9:15 [Qemu-devel] E1000 emulation in qemu and pci configuration space Ayaz Akram
2014-05-05 12:30 ` Stefan Hajnoczi [this message]
[not found] ` <CAC0+NVbUQKq4izoWfPLhXEk9qR4E4yKaVUQQwGZVvm+vc6fnfw@mail.gmail.com>
2014-05-07 13:29 ` Stefan Hajnoczi
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