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From: Gerd Hoffmann <kraxel@redhat.com>
To: qemu-devel@nongnu.org
Cc: Gerd Hoffmann <kraxel@redhat.com>
Subject: [Qemu-devel] [PULL 2/3] usb: add storage hotplug documentation
Date: Tue, 12 Jul 2016 10:48:09 +0200	[thread overview]
Message-ID: <1468313290-14308-3-git-send-email-kraxel@redhat.com> (raw)
In-Reply-To: <1468313290-14308-1-git-send-email-kraxel@redhat.com>

Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-id: 1466667901-1341-1-git-send-email-kraxel@redhat.com
---
 docs/usb-storage.txt | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/docs/usb-storage.txt b/docs/usb-storage.txt
index c5a3866..fbc1f2e 100644
--- a/docs/usb-storage.txt
+++ b/docs/usb-storage.txt
@@ -40,6 +40,18 @@ numbers must be continuous, i.e. for three devices you must use 0+1+2.
 The 0+1+5 numbering from the "usb-uas" example isn't going to work
 with "usb-bot".
 
+Starting with qemu version 2.7 usb-bot and usb-uas devices can be
+hotplugged.  In the hotplug case they are added with "attached =
+false" so the guest will not see the device until the "attached"
+property is explicitly set to true.  That allows to attach one or more
+scsi devices before making the device visible to the guest, i.e. the
+workflow looks like this:
+
+   (1) device-add usb-bot,id=foo
+   (2) device-add scsi-{hd,cd},bus=foo.0,lun=0
+   (2b) optionally add more devices (luns 1 ... 15).
+   (3) scripts/qmp/qom-set foo.attached = true
+
 enjoy,
   Gerd
 
-- 
1.8.3.1

  parent reply	other threads:[~2016-07-12  8:48 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-07-12  8:48 [Qemu-devel] [PULL 0/3] usb: misc fixes Gerd Hoffmann
2016-07-12  8:48 ` [Qemu-devel] [PULL 1/3] nec-usb-xhci: set the device state to USB_STATE_DEFAULT Gerd Hoffmann
2016-07-12  8:48 ` Gerd Hoffmann [this message]
2016-07-12  8:48 ` [Qemu-devel] [PULL 3/3] xen-usb: Fix 32bit build Gerd Hoffmann
2016-07-12 11:34 ` [Qemu-devel] [PULL 0/3] usb: misc fixes Peter Maydell

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