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[Qemu-devel] [PATCH 1.1] xhci: add usage info to docs

From: Gerd Hoffmann
Subject: [Qemu-devel] [PATCH 1.1] xhci: add usage info to docs
Date: Tue, 29 May 2012 11:20:31 +0200

Signed-off-by: Gerd Hoffmann <address@hidden>
 docs/usb2.txt |   15 +++++++++++++++
 1 files changed, 15 insertions(+), 0 deletions(-)

diff --git a/docs/usb2.txt b/docs/usb2.txt
index 228aa33..d17e3c0 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

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