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xen-bugs
[Xen-bugs] [Bug 1534] New: [VT-d] Fail to hot remove/add a static assign
http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1534
Summary: [VT-d] Fail to hot remove/add a static assigned device
in guest
Product: Xen
Version: unstable
Platform: Other
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P2
Component: Tools
AssignedTo: xen-bugs@xxxxxxxxxxxxxxxxxxx
ReportedBy: jiajun.xu@xxxxxxxxx
Environment:
------------
Service Arch (ia32/ia32e/IA64): ia32-pae
Guest Arch (ia32/ia32e/IA64): ia32-pae
Guest OS Type (Linux/Windows): Linux
Change Set: 20382
Hardware: Gulftown-HEDT
Other:
xen-changeset: 20382:c1f2b68b6dca
pvops git:
commit aa218d939df218dd0fd2a87dcfdf18f3105f44de
Merge: 9cf89da... 67191ef...
Author: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>
ioemu git:
commit b4bb8b3f09d1c873f522f6aebe1f125a6d1854d0
Author: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
Date: Wed Oct 21 16:42:15 2009 +0100
Bug detailed description:
--------------------------
With latest commit, hot remove a static assigned device in guest, and then hot
add the device to guest will fail. Xend will report the device has been
attached!! And by "xm pci-list guest_id" can see the device is assigned to the
guest but we can not see the device by lpsci in guest.
BTW, if booting a guest with no static assigned device and do hot add/remove
for the guest, there is no such issue.
[root@vt-nhm2 ~]# xm li
Name ID Mem VCPUs State Time(s)
Domain-0 0 1946 12 r----- 14203.1
vVTD_ASS2_02_1257156060 112 512 2 -b---- 29.1
[root@vt-nhm2 ~]# xm pci-detach 112 04:00.0
[root@vt-nhm2 ~]# xm pci-attach 112 04:00.0
Error: pci: device 0000:04:00.0 has been attached!
Usage: xm pci-attach [-o|--options=<opt>] <Domain> <domain:bus:slot.func>
[virtual slot]
Insert a new pass-through pci device.
[root@vt-nhm2 ~]# xm pci-list-a
0000:04:00.0
0000:00:19.0
[root@vt-nhm2 ~]# xm pci-list 112
domain bus slot func
0x0000 0x04 0x00 0x0
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