From e78bd5ab07d65fec77fcae468b2836c79a836d49 Mon Sep 17 00:00:00 2001 From: Gerd Hoffmann Date: Tue, 29 May 2012 11:20:31 +0200 Subject: xhci: add usage info to docs Signed-off-by: Gerd Hoffmann Signed-off-by: Anthony Liguori --- docs/usb2.txt | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'docs/usb2.txt') diff --git a/docs/usb2.txt b/docs/usb2.txt index 228aa33ceb..d17e3c0044 100644 --- a/docs/usb2.txt +++ b/docs/usb2.txt @@ -55,6 +55,21 @@ try ... ... then use "bus=ehci.0" to assign your usb devices to that bus. +xhci controller support +----------------------- + +There also is xhci host controller support available. It got alot +less testing than ehci and there are a bunch of known limitations, so +ehci may work better for you. On the other hand the xhci hardware +design is much more virtualization-friendly, thus xhci emulation uses +less ressources (especially cpu). If you wanna give xhci a try +use this to add the host controller ... + + qemu -device nec-usb-xhci,id=xhci + +... then use "bus=xhci.0" when assigning usb devices. + + More USB tips & tricks ====================== -- cgit v1.2.1