https://bugzilla.kernel.org/show_bug.cgi?id=29232
Summary: [VT-d] VT-d device passthrough fail to guest
Product: Virtualization
Version: unspecified
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: high
Priority: P1
Component: kvm
AssignedTo: virtualization_...@kernel-bugs.osdl.org
ReportedBy: xudong....@intel.com
CC: a...@redhat.com
Regression: Yes
Environment:
------------
Host OS : IA32E
Guest OS : IA32E
kvm.git Commit: a685b38e272587e644fedd37269ddb82df21c052
qemu-kvm Commit: 671d89d6411655bb4f8058ce6eb86bb0bb8ec978
Host Kernel Version: 2.6.38-rc4
Bug detailed description:
--------------------------
When assign one PCI/e device to guest, qemu report error and guest can not boot
up. If do hot-add device to guest, qemu will be killed.
[root@vt-nhm9 qemu-kvm]# qemu-system-x86_64 -m 512 -smp 2 -device
pci-assign,host=13:00.0 -net none -hda /path/rhel5.img
assigned_dev_pci_read: pread failed, ret = 0 errno = 22
Reproduce steps:
----------------
1) install latest kvm and qemu-kvm
2) qemu-system-x86_64 -m 512 -smp 2 -device pci-assign,host=13:00.0 -net none
-hda /path/rhel5.img
3) there will be a qemu error
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