From: Stefan Hajnoczi <stefanha@redhat.com>
To: qemu-devel@nongnu.org
Cc: kraxel@redhat.com, Stefan Hajnoczi <stefanha@redhat.com>
Subject: [Qemu-devel] [PATCH] usb: reword -usb command-line option and mention xHCI
Date: Tue, 13 Aug 2019 14:30:42 +0100 [thread overview]
Message-ID: <20190813133042.11683-1-stefanha@redhat.com> (raw)
The -usb section of the man page is not very clear on what exactly -usb
does and fails to mention xHCI as a modern alternative (-device
nec-usb-xhci).
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
qemu-options.hx | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/qemu-options.hx b/qemu-options.hx
index 9621e934c0..7d11c016d1 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -1436,12 +1436,15 @@ STEXI
ETEXI
DEF("usb", 0, QEMU_OPTION_usb,
- "-usb enable the USB driver (if it is not used by default yet)\n",
+ "-usb enable on-board USB host controller (if not enabled by default)\n",
QEMU_ARCH_ALL)
STEXI
@item -usb
@findex -usb
-Enable the USB driver (if it is not used by default yet).
+Enable USB emulation on machine types with an on-board USB host controller (if
+not enabled by default). Note that on-board USB host controllers may not
+support USB 3.0. In this case -device nec-usb-xhci can be used instead on
+machines with PCI.
ETEXI
DEF("usbdevice", HAS_ARG, QEMU_OPTION_usbdevice,
--
2.21.0
next reply other threads:[~2019-08-13 13:31 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-13 13:30 Stefan Hajnoczi [this message]
2019-08-13 17:54 ` [Qemu-devel] [PATCH] usb: reword -usb command-line option and mention xHCI Thomas Huth
2019-08-14 13:23 ` Stefan Hajnoczi
2019-08-15 6:13 ` Gerd Hoffmann
2019-08-15 14:09 ` Stefan Hajnoczi
2019-08-14 9:58 ` Dr. David Alan Gilbert
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