Bug 1210521

Summary:	Sync MTRRs with KVM and disable on reset
Product:	Red Hat Enterprise Linux 7	Reporter:	Alex Williamson <alex.williamson>
Component:	qemu-kvm-rhev	Assignee:	Alex Williamson <alex.williamson>
Status:	CLOSED ERRATA	QA Contact:	Virtualization Bugs <virt-bugs>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	7.2	CC:	chayang, hhuang, huding, juzhang, knoel, rbalakri, virt-bugs, virt-maint, xfu
Target Milestone:	rc
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	qemu-2.3	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:	1210510	Environment:
Last Closed:	2015-12-04 16:35:49 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1210510
Bug Blocks:

Comment 3 Chao Yang 2015-09-01 06:35:18 UTC

Verified passed as no regression was found with qemu-kvm-rhev-2.3.0-21.el7.x86_64

Steps:
1. cold plug a vfio-pci device, boot the guest
2. reboot the guest and look for any unusual delays in the VM BIOS init
3. hot-unplug the vfio-pci device and migrate the VM
4. reboot the guest on the migration target
5. hot plug a vfio-pci device to it and reboot
6. hot-unplug the vfio-pci device and migrate the VM back 
7. reboot the guest on the migration target

Tests were done with both seabios(seabios-bin-1.7.5-11.el7.noarch) and OVMF(OVMF-20150414-2.gitc9e5618.el7.noarch.rpm), neither observed abnormal behaviour during firmware initialization. 

CLI:

/usr/libexec/qemu-kvm -S -name test -m 4G -realtime mlock=on -smp 4,sockets=2,cores=2,threads=1 -no-user-config -nodefaults -rtc base=utc,driftfix=slew -global kvm-pit.lost_tick_policy=discard -drive file=/usr/share/OVMF/OVMF_CODE.fd,if=pflash,format=raw,unit=0,readonly=on -drive file=/usr/share/OVMF/OVMF_VARS.fd,if=pflash,format=raw,unit=1 -boot menu=on,strict=on -device ich9-usb-ehci1,id=usb,bus=pci.0,addr=0x5.0x7 -device ich9-usb-uhci1,masterbus=usb.0,firstport=0,bus=pci.0,multifunction=on,addr=0x5 -device ich9-usb-uhci2,masterbus=usb.0,firstport=2,bus=pci.0,addr=0x5.0x1 -device ich9-usb-uhci3,masterbus=usb.0,firstport=4,bus=pci.0,addr=0x5.0x2 -device virtio-scsi-pci,id=scsi0,bus=pci.0 -drive file=/mnt/rhel7.2-with-ovmf.qcow2,if=none,id=drive-virtio-disk0,format=qcow2,cache=none -device virtio-blk-pci,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1 -device virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x7 -netdev tap,id=idinWyYp,vhost=on -device virtio-net-pci,mac=42:ce:a9:d1:4d:d5,id=idlbq7eA,netdev=idinWyYp -device usb-tablet,id=input0 -vga qxl -global qxl-vga.ram_size=67108864 -global qxl-vga.vram_size=33554432 -spice port=8000,disable-ticketing -msg timestamp=on -monitor stdio -device vfio-pci,host=0000:05:00.0,id=pf



Per above, this issue has fixed.

Comment 4 juzhang 2015-09-07 02:22:52 UTC

According to comment3, set this issue as verified.

Comment 6 errata-xmlrpc 2015-12-04 16:35:49 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2015-2546.html