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authorChristian Krinitsin <mail@krinitsin.com>2025-07-03 07:27:52 +0000
committerChristian Krinitsin <mail@krinitsin.com>2025-07-03 07:27:52 +0000
commitd0c85e36e4de67af628d54e9ab577cc3fad7796a (patch)
treef8f784b0f04343b90516a338d6df81df3a85dfa2 /results/classifier/gemma3:12b/permissions/1892581
parent7f4364274750eb8cb39a3e7493132fca1c01232e (diff)
downloadqemu-analysis-d0c85e36e4de67af628d54e9ab577cc3fad7796a.tar.gz
qemu-analysis-d0c85e36e4de67af628d54e9ab577cc3fad7796a.zip
add deepseek and gemma results
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+
+QEMU 5.1 no longer says anything about inaccessible devices
+
+Previously, with QEMU 5.0.0 running a VM with the following command:
+
+$ qemu-system-x86_64 -enable-kvm -hda arch-zoom.qcow2 -m 4G -device usb-ehci,id=ehci -device usb-host,bus=ehci.0,vendorid=0x04f2,productid=0xb449 -device intel-hda -device hda-duplex -vga virtio
+
+Would display something like the following:
+
+libusb: error [_get_usbfs_fd] libusb couldn't open USB device /dev/bus/usb/002/004: Permission denied
+libusb: error [_get_usbfs_fd] libusb requires write access to USB device nodes.
+libusb: error [_get_usbfs_fd] libusb couldn't open USB device /dev/bus/usb/002/004: Permission denied
+libusb: error [_get_usbfs_fd] libusb requires write access to USB device nodes.
+
+With insufficient permissions.
+
+QEMU 5.1.0 no longer displays anything.
+
+I did a git bisect and this is the result:
+
+[diego@thinkpad qemu]$ git bisect bad
+9f815e83e983d247a3cd67579d2d9c1765adc644 is the first bad commit
+commit 9f815e83e983d247a3cd67579d2d9c1765adc644
+Author: Gerd Hoffmann <email address hidden>
+Date:   Fri Jun 5 14:59:52 2020 +0200
+
+    usb: add hostdevice property to usb-host
+
+    The new property allows to specify usb host device name.  Uses standard
+    qemu_open(), so both file system path (/dev/bus/usb/$bus/$dev on linux)
+    and file descriptor passing can be used.
+
+    Requires libusb 1.0.23 or newer.  The hostdevice property is only
+    present in case qemu is compiled against a new enough library version,
+    so the presence of the property can be used for feature detection.
+
+    Signed-off-by: Gerd Hoffmann <email address hidden>
+    Message-Id: <email address hidden>
+
+ hw/usb/host-libusb.c | 75 ++++++++++++++++++++++++++++++++++++++++++----------
+ hw/usb/trace-events  |  1 +
+ 2 files changed, 62 insertions(+), 14 deletions(-)
+[diego@thinkpad qemu]$
\ No newline at end of file