From: Gerd Hoffmann <kraxel@redhat.com>
To: tom289332@Safe-mail.net
Cc: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] What is the current state of the various usb implementations?
Date: Tue, 11 Dec 2012 11:05:04 +0100 [thread overview]
Message-ID: <50C70550.2010101@redhat.com> (raw)
In-Reply-To: <N1-osqkdBUjxi@Safe-mail.net>
On 12/10/12 17:38, tom289332@Safe-mail.net wrote:
> Hello,
>
> I sent this to qemu-discuss a week ago and got no responses, so I'm trying here.
>
> Looking at `qemu-kvm -device ?`, there seem to be multiple usb implementations:
> ich9-usb-uhci2
> ich9-usb-uhci3
> ich9-usb-uhci1
> piix3-usb-uhci
> piix4-usb-uhci
> vt82c686b-usb-uhci
These are all UHCI, just variants with different pci ids for the
different chipsets we are emulating. USB 1.1. Stable.
> ich9-usb-ehci1
> usb-ehci
Likewise these basially differ in the pci id only. USB 2.0. Needs
UHCI/OHCI companion controllers for USB 1.1 support (see
docs/ich9-ehci-uhci.cfg). Stable.
> nec-usb-xhci
XHCI. USB 3.0. Mostly stable. Has seen less testing that the others
though, both because it is the youngest code base and because guest
support isn't that good.
cheers,
Gerd
prev parent reply other threads:[~2012-12-11 10:31 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-10 16:38 [Qemu-devel] What is the current state of the various usb implementations? tom289332
2012-12-11 9:03 ` Stefan Hajnoczi
2012-12-11 9:28 ` Zhi Yong Wu
2012-12-11 10:05 ` Gerd Hoffmann [this message]
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