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Bug 1664792 - mode="host-model" VMs include broken "arch-facilities" flag name [qemu-kvm] [rhel-7.6.z]
Summary: mode="host-model" VMs include broken "arch-facilities" flag name [qemu-kvm] [...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: qemu-kvm
Version: 7.7
Hardware: Unspecified
OS: Unspecified
high
unspecified
Target Milestone: rc
: ---
Assignee: Eduardo Habkost
QA Contact: Guo, Zhiyi
URL:
Whiteboard:
Depends On: 1658407
Blocks:
TreeView+ depends on / blocked
 
Reported: 2019-01-09 16:37 UTC by RAD team bot copy to z-stream
Modified: 2019-01-29 17:25 UTC (History)
5 users (show)

Fixed In Version: qemu-kvm-1.5.3-160.el7_6.1
Doc Type: If docs needed, set a value
Doc Text:
Clone Of: 1658407
Environment:
Last Closed: 2019-01-29 17:25:12 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2019:0198 0 None None None 2019-01-29 17:25:13 UTC

Description RAD team bot copy to z-stream 2019-01-09 16:37:34 UTC 
This bug has been copied from bug #1658407 and has been proposed to be backported to 7.6 z-stream (EUS).
Comment 3 Miroslav Rezanina 2019-01-14 07:25:51 UTC 
Fix included in qemu-kvm-1.5.3-160.el7_6.1
Comment 5 Guo, Zhiyi 2019-01-17 05:52:45 UTC 
Reproduce this issue against qemu-kvm-1.5.3-160.el7.x86_64

Package used:
3.10.0-957.1.3.el7.x86_64
qemu-kvm-1.5.3-160.el7.x86_64

Host used:
# lscpu
Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian
CPU(s):                192
On-line CPU(s) list:   0-191
Thread(s) per core:    2
Core(s) per socket:    24
Socket(s):             4
NUMA node(s):          4
Vendor ID:             GenuineIntel
CPU family:            6
Model:                 85
Model name:            Genuine Intel(R) CPU 0000%@
Stepping:              6
CPU MHz:               1883.489
CPU max MHz:           3900.0000
CPU min MHz:           1000.0000
BogoMIPS:              4600.00
Virtualization:        VT-x
L1d cache:             32K
L1i cache:             32K
L2 cache:              1024K
L3 cache:              33792K
NUMA node0 CPU(s):     0-23,96-119
NUMA node1 CPU(s):     24-47,120-143
NUMA node2 CPU(s):     48-71,144-167
NUMA node3 CPU(s):     72-95,168-191
Flags:                 fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch epb cat_l3 cdp_l3 intel_ppin intel_pt ssbd mba ibrs ibpb stibp ibrs_enhanced tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm cqm mpx rdt_a avx512f avx512dq rdseed adx smap clflushopt clwb avx512cd avx512bw avx512vl xsaveopt xsavec xgetbv1 cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local dtherm ida arat pln pts hwp hwp_act_window hwp_epp hwp_pkg_req pku ospke avx512_vnni spec_ctrl intel_stibp flush_l1d arch_capabilities


Steps:
1)Boot rhel7.6.z guest with qemu cli:
/usr/libexec/qemu-kvm -name rhel7.6 -m 8G \
                -smp 1 \
                -device VGA \
                -serial unix:/tmp/console,server,nowait \
                -cpu host,enforce \
                -drive file=/home/rhel76.qcow2,if=none,id=drive-scsi-disk0,format=qcow2,cache=none,werror=stop,rerror=stop -device virtio-scsi-pci,id=scsi0 -device scsi-hd,drive=drive-scsi-disk0,bus=scsi0.0,scsi-id=0,lun=0,id=scsi-disk0,bootindex=1 \
                -monitor stdio \
                -vnc :0 \
2)Boot rhel7.6.z guest with qemu cli:
/usr/libexec/qemu-kvm -name rhel7.6 -m 8G \
                -smp 1 \
                -device VGA \
                -serial unix:/tmp/console,server,nowait \
                -cpu Skylake-Server-IBRS,+arch-facilities,enforce \
                -drive file=/home/rhel76.qcow2,if=none,id=drive-scsi-disk0,format=qcow2,cache=none,werror=stop,rerror=stop -device virtio-scsi-pci,id=scsi0 -device scsi-hd,drive=drive-scsi-disk0,bus=scsi0.0,scsi-id=0,lun=0,id=scsi-disk0,bootindex=1 \
                -monitor stdio \
                -vnc :0 \
3)Try to migrate guest with qemu configuration like step 2) to another host

Results:
After step 1), can see arch_capabilities inside guest:
Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian
CPU(s):                1
On-line CPU(s) list:   0
Thread(s) per core:    1
Core(s) per socket:    1
Socket(s):             1
NUMA node(s):          1
Vendor ID:             GenuineIntel
CPU family:            6
Model:                 85
Model name:            Genuine Intel(R) CPU 0000%@
Stepping:              6
CPU MHz:               2294.608
BogoMIPS:              4589.21
Hypervisor vendor:     KVM
Virtualization type:   full
L1d cache:             32K
L1i cache:             32K
L2 cache:              4096K
NUMA node0 CPU(s):     0
Flags:                 fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon rep_good nopl eagerfpu pni pclmulqdq ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch ssbd ibrs ibpb stibp ibrs_enhanced fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm mpx avx512f avx512dq rdseed adx smap clflushopt clwb avx512cd avx512bw avx512vl xsaveopt xsavec xgetbv1 pku ospke avx512_vnni spec_ctrl intel_stibp arch_capabilities

After step 2), can see arch_capabilities inside guest:
Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian
CPU(s):                1
On-line CPU(s) list:   0
Thread(s) per core:    1
Core(s) per socket:    1
Socket(s):             1
NUMA node(s):          1
Vendor ID:             GenuineIntel
CPU family:            6
Model:                 85
Model name:            Intel Xeon Processor (Skylake, IBRS)
Stepping:              4
CPU MHz:               2294.608
BogoMIPS:              4589.21
Hypervisor vendor:     KVM
Virtualization type:   full
L1d cache:             32K
L1i cache:             32K
L2 cache:              4096K
NUMA node0 CPU(s):     0
Flags:                 fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 syscall nx pdpe1gb rdtscp lm constant_tsc rep_good nopl eagerfpu pni pclmulqdq ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch ibrs ibpb ibrs_enhanced fsgsbase bmi1 hle avx2 smep bmi2 erms invpcid rtm mpx avx512f avx512dq rdseed adx smap clwb avx512cd avx512bw avx512vl xsaveopt xsavec xgetbv1 spec_ctrl arch_capabilities

After step 3), guest migration can start

Verify this issue against qemu-img-1.5.3-160.el7_6.1.x86_64

After step 1), cannot see arch_capabilities inside guest
After step 2), can see arch_capabilities inside guest, and qemu will report warning:
(qemu) qemu-kvm: WARNING: the arch-facilities CPU feature is deprecated and does not support live migration
After step 3), guest cannot be migrated now and qemu will prompt:
migrate: The arch-facilities CPU feature is deprecated and does not support live migration
Comment 6 Guo, Zhiyi 2019-01-17 05:54:10 UTC 
Verified per comment 5
Comment 8 errata-xmlrpc 2019-01-29 17:25:12 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://access.redhat.com/errata/RHBA-2019:0198
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