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Bug 1464832 - host-model CPU with check='full' does not work well when the host-model cpu contains more fea-tures in the qemu
Summary: host-model CPU with check='full' does not work well when the host-model cpu c...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: libvirt
Version: 7.4
Hardware: x86_64
OS: Linux
medium
medium
Target Milestone: rc
: ---
Assignee: Jiri Denemark
QA Contact: Luyao Huang
URL:
Whiteboard:
Depends On:
Blocks: libvirtCPUconfig
TreeView+ depends on / blocked
 
Reported: 2017-06-26 02:04 UTC by Luyao Huang
Modified: 2020-08-13 09:27 UTC (History)
8 users (show)

Fixed In Version: libvirt-3.9.0-1.el7
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2018-04-10 10:50:46 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Bugzilla 1467599 0 unspecified CLOSED Unable to start domain: the CPU is incompatible with host CPU: Host CPU does not provide required features: svm 2022-05-16 11:32:56 UTC
Red Hat Product Errata RHEA-2018:0704 0 None None None 2018-04-10 10:52:02 UTC

Internal Links: 1467599

Description Luyao Huang 2017-06-26 02:04:57 UTC 
Description of problem:
host-model CPU with check='full' does not work well when the host-model cpu contains more features in th qemu

Version-Release number of selected component (if applicable):
libvirt-3.2.0-14.el7.x86_64

How reproducible:
100%

Steps to Reproduce:

1. check domcapabilities:

virsh # domcapabilities 
...
  <cpu>
    <mode name='host-passthrough' supported='yes'/>
    <mode name='host-model' supported='yes'>
      <model fallback='forbid'>SandyBridge</model>
      <vendor>Intel</vendor>
      <feature policy='require' name='vme'/>
      <feature policy='require' name='ss'/>
      <feature policy='require' name='pcid'/>
      <feature policy='require' name='hypervisor'/>
      <feature policy='require' name='arat'/>
      <feature policy='require' name='tsc_adjust'/>
      <feature policy='require' name='pdpe1gb'/>
      <feature policy='require' name='invtsc'/>
      <feature policy='disable' name='xsave'/>
      <feature policy='disable' name='avx'/>
    </mode>
    <mode name='custom' supported='yes'>
      <model usable='yes'>qemu64</model>
      <model usable='yes'>qemu32</model>
      <model usable='no'>phenom</model>
      <model usable='yes'>pentium3</model>
      <model usable='yes'>pentium2</model>
      <model usable='yes'>pentium</model>
      <model usable='no'>n270</model>
      <model usable='yes'>kvm64</model>
      <model usable='yes'>kvm32</model>
      <model usable='no'>cpu64-rhel6</model>
      <model usable='yes'>coreduo</model>
      <model usable='yes'>core2duo</model>
      <model usable='no'>athlon</model>
      <model usable='yes'>Westmere</model>
      <model usable='no'>Skylake-Client</model>
      <model usable='no'>SandyBridge</model>
      <model usable='yes'>Penryn</model>
      <model usable='no'>Opteron_G5</model>
      <model usable='no'>Opteron_G4</model>
      <model usable='no'>Opteron_G3</model>
      <model usable='yes'>Opteron_G2</model>
      <model usable='yes'>Opteron_G1</model>
      <model usable='yes'>Nehalem</model>
      <model usable='no'>IvyBridge</model>
      <model usable='no'>Haswell</model>
      <model usable='no'>Haswell-noTSX</model>
      <model usable='yes'>Conroe</model>
      <model usable='no'>Broadwell</model>
      <model usable='no'>Broadwell-noTSX</model>
      <model usable='yes'>486</model>
    </mode>
  </cpu>
...

S1: start a guest with host-model + check full:

1. guest xml

  <cpu mode='host-model' check='full'>
    <model fallback='allow'/>

2. start guest, libvirt will report that xsaveopt is missing:

virsh # start r7
error: Failed to start domain r7
error: operation failed: guest CPU doesn't match specification: missing features: xsaveopt

3. modify xml to disable xsaveopt:

  <cpu mode='host-model' check='full'>
    <model fallback='allow'/>
    <feature policy='disable' name='xsaveopt'/>

4. start guest:

virsh # start r7
Domain r7 started

5. recheck the guest live xml:

  <cpu mode='custom' match='exact' check='full'>
    <model fallback='forbid'>SandyBridge</model>
    <vendor>Intel</vendor>
    <feature policy='require' name='vme'/>
    <feature policy='require' name='ss'/>
    <feature policy='require' name='pcid'/>
    <feature policy='require' name='hypervisor'/>
    <feature policy='require' name='arat'/>
    <feature policy='require' name='tsc_adjust'/>
    <feature policy='require' name='pdpe1gb'/>
    <feature policy='disable' name='xsave'/>
    <feature policy='disable' name='avx'/>
    <feature policy='disable' name='xsaveopt'/>

6. login guest and check cpu:

IN GUEST:

# lscpu
...
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 rep_good nopl xtopology pni pclmulqdq ssse3 cx16 pcid sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer aes hypervisor lahf_lm tsc_adjust arat

7. check the qemu log, there is no warning.

S2: start a guest with host-model + check is partial

1. modify guest xml to:

  <cpu mode='host-model' check='partial'>
    <model fallback='allow'/>

2. start guest:

# virsh start r7
Domain r7 started


3. check the guest xml and that xsaveopt will be displayed as disabled:

  <cpu mode='custom' match='exact' check='full'>
    <model fallback='forbid'>SandyBridge</model>
    <vendor>Intel</vendor>
    <feature policy='require' name='vme'/>
    <feature policy='require' name='ss'/>
    <feature policy='require' name='pcid'/>
    <feature policy='require' name='hypervisor'/>
    <feature policy='require' name='arat'/>
    <feature policy='require' name='tsc_adjust'/>
    <feature policy='require' name='pdpe1gb'/>
    <feature policy='disable' name='xsave'/>
    <feature policy='disable' name='avx'/>
    <feature policy='disable' name='xsaveopt'/>

4. check the guest log: 

warning: host doesn't support requested feature: CPUID.0DH:EAX.xsaveopt [bit 0]
warning: host doesn't support requested feature: CPUID.0DH:EAX.xsaveopt [bit 0]
warning: host doesn't support requested feature: CPUID.0DH:EAX.xsaveopt [bit 0]
warning: host doesn't support requested feature: CPUID.0DH:EAX.xsaveopt [bit 0]
warning: host doesn't support requested feature: CPUID.0DH:EAX.xsaveopt [bit 0]


S3: host-model + check is none:

the same result with check is partial


Actual results:

Libvirt didn't disable the xsaveopt when use host-model

But qemu already report host didn't have xsaveopt:

 {"name":"SandyBridge","typename":"SandyBridge-x86_64-cpu","unavailable-features":["xsaveopt"],"static":false,"migration-safe":true}

Expected results:
S1: Guest start without disable xsaveopt in guest xml
S2: Do not for add the xsaveopt cpu property in the qemu command line
S3: Do not for add the xsaveopt cpu property in the qemu command line

Additional info:

output from http://libvirt.org/git/?p=libvirt.git;a=blob_plain;f=tests/cputestdata/cpu-gather.sh:

model name	: Intel(R) Xeon(R) CPU E7- 4830  @ 2.13GHz
CPU:
   0x00000000 0x00: eax=0x0000000b ebx=0x756e6547 ecx=0x6c65746e edx=0x49656e69
   0x00000001 0x00: eax=0x000206f2 ebx=0x05400800 ecx=0x02bee3ff edx=0xbfebfbff
   0x00000002 0x00: eax=0x55035a01 ebx=0x00f0b2ec ecx=0x00000000 edx=0x09ca212c
   0x00000003 0x00: eax=0x00000000 ebx=0x00000000 ecx=0x00000000 edx=0x00000000
   0x00000004 0x00: eax=0x7c004121 ebx=0x01c0003f ecx=0x0000003f edx=0x00000000
   0x00000004 0x01: eax=0x7c004122 ebx=0x00c0003f ecx=0x0000007f edx=0x00000000
   0x00000004 0x02: eax=0x7c004143 ebx=0x01c0003f ecx=0x000001ff edx=0x00000000
   0x00000004 0x03: eax=0x7c0fc163 ebx=0x05c0003f ecx=0x00003fff edx=0x00000006
   0x00000005 0x00: eax=0x00000040 ebx=0x00000040 ecx=0x00000003 edx=0x00001120
   0x00000006 0x00: eax=0x00000007 ebx=0x00000001 ecx=0x00000009 edx=0x00000000
   0x00000007 0x00: eax=0x00000000 ebx=0x00000000 ecx=0x00000000 edx=0x00000000
   0x00000008 0x00: eax=0x00000000 ebx=0x00000000 ecx=0x00000000 edx=0x00000000
   0x00000009 0x00: eax=0x00000001 ebx=0x00000000 ecx=0x00000000 edx=0x00000000
   0x0000000a 0x00: eax=0x07300403 ebx=0x00000004 ecx=0x00000000 edx=0x00000603
   0x0000000b 0x00: eax=0x00000001 ebx=0x00000002 ecx=0x00000100 edx=0x00000005
   0x0000000b 0x01: eax=0x00000006 ebx=0x00000010 ecx=0x00000201 edx=0x00000005
   0x80000000 0x00: eax=0x80000008 ebx=0x00000000 ecx=0x00000000 edx=0x00000000
   0x80000001 0x00: eax=0x00000000 ebx=0x00000000 ecx=0x00000001 edx=0x2c100800
   0x80000002 0x00: eax=0x20202020 ebx=0x49202020 ecx=0x6c65746e edx=0x20295228
   0x80000003 0x00: eax=0x6e6f6558 ebx=0x20295228 ecx=0x20555043 edx=0x202d3745
   0x80000004 0x00: eax=0x30333834 ebx=0x20402020 ecx=0x33312e32 edx=0x007a4847
   0x80000005 0x00: eax=0x00000000 ebx=0x00000000 ecx=0x00000000 edx=0x00000000
   0x80000006 0x00: eax=0x00000000 ebx=0x00000000 ecx=0x01006040 edx=0x00000000
   0x80000007 0x00: eax=0x00000000 ebx=0x00000000 ecx=0x00000000 edx=0x00000100
   0x80000008 0x00: eax=0x0000302c ebx=0x00000000 ecx=0x00000000 edx=0x00000000
   0x80860000 0x00: eax=0x00000001 ebx=0x00000002 ecx=0x00000100 edx=0x00000005
   0xc0000000 0x00: eax=0x00000001 ebx=0x00000002 ecx=0x00000100 edx=0x00000005

{"QMP": {"version": {"qemu": {"micro": 0, "minor": 9, "major": 2}, "package": "(qemu-kvm-rhev-2.9.0-12.el7)"}, "capabilities": []}}
{"return": {}}
{"return": {"model": {"name": "base", "props": {"phys-bits": 0, "core-id": -1, "xlevel": 2147483656, "cmov": true, "ia64": false, "aes": true, "mmx": true, "arat": true, "rdpid": false, "pause-filter": false, "xsavec": false, "osxsave": false, "tsc-frequency": 0, "xd": true, "hv-vendor-id": "", "kvm-asyncpf": true, "kvm_asyncpf": true, "perfctr_core": false, "perfctr-core": false, "mpx": false, "avx512cd": false, "decodeassists": false, "pbe": false, "sse4_1": true, "sse4.1": true, "sse4-1": true, "family": 6, "vmware-cpuid-freq": true, "avx512f": false, "xcrypt": false, "msr": true, "mce": true, "mca": true, "thread-id": -1, "min-level": 11, "xgetbv1": false, "cid": false, "hv-relaxed": false, "fxsr": true, "ds": false, "hv-crash": false, "xsaveopt": false, "xtpr": false, "avx512-vpopcntdq": false, "phe": false, "avx512vl": false, "extapic": false, "3dnowprefetch": false, "cr8legacy": false, "cpuid-0xb": true, "xcrypt-en": false, "kvm_pv_eoi": true, "apic-id": 4294967295, "pn": false, "dca": false, "vendor": "GenuineIntel", "pku": false, "smx": false, "cmp-legacy": false, "cmp_legacy": false, "avx512-4fmaps": false, "vmcb-clean": false, "vmcb_clean": false, "3dnowext": false, "hle": false, "npt": false, "memory": "/machine/unattached/system[0]", "clwb": false, "lbrv": false, "adx": false, "ss": true, "pni": true, "svm_lock": false, "svm-lock": false, "smep": false, "pfthreshold": false, "smap": false, "x2apic": true, "avx512vbmi": false, "i64": true, "flushbyasid": false, "f16c": false, "ace2-en": false, "pat": true, "pae": true, "sse": true, "phe-en": false, "kvm-nopiodelay": true, "kvm_nopiodelay": true, "tm": false, "kvmclock-stable-bit": true, "hypervisor": true, "socket-id": -1, "pcommit": false, "syscall": true, "level": 11, "avx512dq": false, "svm": false, "full-cpuid-auto-level": true, "invtsc": false, "sse3": true, "sse2": true, "est": false, "avx512ifma": false, "tm2": false, "kvm-pv-eoi": true, "cx8": true, "kvm-mmu": false, "kvm_mmu": false, "sse4_2": true, "sse4.2": true, "sse4-2": true, "pge": true, "fill-mtrr-mask": true, "pdcm": false, "nodeid_msr": false, "model": 47, "movbe": false, "nrip-save": false, "nrip_save": false, "sse4a": false, "ssse3": true, "kvm_pv_unhalt": true, "invpcid": false, "pdpe1gb": true, "tsc-deadline": true, "fma": false, "cx16": true, "de": true, "enforce": false, "stepping": 2, "xsave": false, "clflush": true, "skinit": false, "tce": false, "tsc": true, "fpu": true, "ds-cpl": false, "ds_cpl": false, "ibs": false, "host-phys-bits": true, "fma4": false, "la57": false, "osvw": false, "check": true, "hv-spinlocks": -1, "pmm": false, "apic": true, "pmu": false, "min-xlevel2": 0, "tsc-adjust": true, "tsc_adjust": true, "kvm-steal-time": true, "kvm_steal_time": true, "kvmclock": true, "l3-cache": true, "lwp": false, "xop": false, "avx": false, "ospke": false, "ace2": false, "acpi": false, "avx512bw": false, "hv-vapic": false, "fsgsbase": false, "ht": false, "nx": true, "pclmulqdq": true, "mmxext": false, "popcnt": true, "xsaves": false, "lm": true, "umip": false, "avx2": false, "pse": true, "sep": true, "pclmuldq": true, "nodeid-msr": false, "kvm": true, "misalignsse": false, "min-xlevel": 2147483656, "bmi2": false, "bmi1": false, "kvm-pv-unhalt": true, "realized": false, "tsc-scale": false, "tsc_scale": false, "topoext": false, "xlevel2": 0, "clflushopt": false, "kvm-no-smi-migration": false, "monitor": false, "avx512er": false, "pmm-en": false, "pcid": true, "3dnow": false, "erms": false, "lahf-lm": true, "lahf_lm": true, "xstore": false, "fxsr-opt": false, "fxsr_opt": false, "rtm": false, "lmce": true, "hv-time": false, "perfctr-nb": false, "perfctr_nb": false, "ffxsr": false, "rdrand": false, "rdseed": false, "avx512-4vnniw": false, "vme": true, "vmx": false, "dtes64": false, "mtrr": true, "rdtscp": true, "pse36": true, "tbm": false, "wdt": false, "pause_filter": false, "model-id": "       Intel(R) Xeon(R) CPU E7- 4830  @ 2.13GHz", "sha-ni": false, "abm": false, "avx512pf": false, "xstore-en": false}}}, "id": "model-expansion"}
{"return": {}}
{"timestamp": {"seconds": 1498440739, "microseconds": 661253}, "event": "SHUTDOWN", "data": {"guest": false}}
Comment 3 Jiri Denemark 2017-09-26 20:20:40 UTC 
Luyao could you please run an updated cpu-gather.sh script (https://gitlab.com/jirkade/libvirt/raw/cpu-fixes/tests/cputestdata/cpu-gather.sh) on the affected host (i.e., Xeon E7-4830) and attach the output here?
Comment 4 Luyao Huang 2017-09-27 02:11:09 UTC 
(In reply to Jiri Denemark from comment #3)
> Luyao could you please run an updated cpu-gather.sh script
> (https://gitlab.com/jirkade/libvirt/raw/cpu-fixes/tests/cputestdata/cpu-
> gather.sh) on the affected host (i.e., Xeon E7-4830) and attach the output
> here?

Hi Jirka,

Here is the output of the updated cpu-gather.sh:

model name	: Intel(R) Xeon(R) CPU E7- 4830  @ 2.13GHz
CPU:
   0x00000000 0x00: eax=0x0000000b ebx=0x756e6547 ecx=0x6c65746e edx=0x49656e69
   0x00000001 0x00: eax=0x000206f2 ebx=0x80400800 ecx=0x02bee3ff edx=0xbfebfbff
   0x00000002 0x00: eax=0x55035a01 ebx=0x00f0b2ec ecx=0x00000000 edx=0x09ca212c
   0x00000003 0x00: eax=0x00000000 ebx=0x00000000 ecx=0x00000000 edx=0x00000000
   0x00000004 0x00: eax=0x7c004121 ebx=0x01c0003f ecx=0x0000003f edx=0x00000000
   0x00000004 0x01: eax=0x7c004122 ebx=0x00c0003f ecx=0x0000007f edx=0x00000000
   0x00000004 0x02: eax=0x7c004143 ebx=0x01c0003f ecx=0x000001ff edx=0x00000000
   0x00000004 0x03: eax=0x7c0fc163 ebx=0x05c0003f ecx=0x00003fff edx=0x00000006
   0x00000005 0x00: eax=0x00000040 ebx=0x00000040 ecx=0x00000003 edx=0x00001120
   0x00000006 0x00: eax=0x00000007 ebx=0x00000001 ecx=0x00000009 edx=0x00000000
   0x00000007 0x00: eax=0x00000000 ebx=0x00000000 ecx=0x00000000 edx=0x00000000
   0x00000008 0x00: eax=0x00000000 ebx=0x00000000 ecx=0x00000000 edx=0x00000000
   0x00000009 0x00: eax=0x00000000 ebx=0x00000000 ecx=0x00000000 edx=0x00000000
   0x0000000a 0x00: eax=0x07300403 ebx=0x00000004 ecx=0x00000000 edx=0x00000603
   0x0000000b 0x00: eax=0x00000001 ebx=0x00000002 ecx=0x00000100 edx=0x00000080
   0x0000000b 0x01: eax=0x00000006 ebx=0x00000010 ecx=0x00000201 edx=0x00000080
   0x80000000 0x00: eax=0x80000008 ebx=0x00000000 ecx=0x00000000 edx=0x00000000
   0x80000001 0x00: eax=0x00000000 ebx=0x00000000 ecx=0x00000001 edx=0x2c100800
   0x80000002 0x00: eax=0x20202020 ebx=0x49202020 ecx=0x6c65746e edx=0x20295228
   0x80000003 0x00: eax=0x6e6f6558 ebx=0x20295228 ecx=0x20555043 edx=0x202d3745
   0x80000004 0x00: eax=0x30333834 ebx=0x20402020 ecx=0x33312e32 edx=0x007a4847
   0x80000005 0x00: eax=0x00000000 ebx=0x00000000 ecx=0x00000000 edx=0x00000000
   0x80000006 0x00: eax=0x00000000 ebx=0x00000000 ecx=0x01006040 edx=0x00000000
   0x80000007 0x00: eax=0x00000000 ebx=0x00000000 ecx=0x00000000 edx=0x00000100
   0x80000008 0x00: eax=0x0000302c ebx=0x00000000 ecx=0x00000000 edx=0x00000000
   0x80860000 0x00: eax=0x00000001 ebx=0x00000002 ecx=0x00000100 edx=0x00000080
   0xc0000000 0x00: eax=0x00000001 ebx=0x00000002 ecx=0x00000100 edx=0x00000080

{"QMP": {"version": {"qemu": {"micro": 0, "minor": 9, "major": 2}, "package": "(qemu-kvm-rhev-2.9.0-16.el7_4.8)"}, "capabilities": []}}
{"return": {}}
{"return": {"model": {"name": "base", "props": {"phys-bits": 0, "core-id": -1, "xlevel": 2147483656, "cmov": true, "ia64": false, "aes": true, "mmx": true, "arat": true, "rdpid": false, "pause-filter": false, "xsavec": false, "osxsave": false, "tsc-frequency": 0, "xd": true, "hv-vendor-id": "", "kvm-asyncpf": true, "kvm_asyncpf": true, "perfctr_core": false, "perfctr-core": false, "mpx": false, "avx512cd": false, "decodeassists": false, "pbe": false, "sse4_1": true, "sse4.1": true, "sse4-1": true, "family": 6, "vmware-cpuid-freq": true, "avx512f": false, "xcrypt": false, "msr": true, "mce": true, "mca": true, "thread-id": -1, "min-level": 11, "xgetbv1": false, "cid": false, "hv-relaxed": false, "fxsr": true, "ds": false, "hv-crash": false, "xsaveopt": false, "xtpr": false, "avx512-vpopcntdq": false, "phe": false, "avx512vl": false, "extapic": false, "3dnowprefetch": false, "cr8legacy": false, "cpuid-0xb": true, "xcrypt-en": false, "kvm_pv_eoi": true, "apic-id": 4294967295, "pn": false, "dca": false, "vendor": "GenuineIntel", "pku": false, "smx": false, "cmp-legacy": false, "cmp_legacy": false, "avx512-4fmaps": false, "vmcb-clean": false, "vmcb_clean": false, "3dnowext": false, "hle": false, "npt": false, "memory": "/machine/unattached/system[0]", "clwb": false, "lbrv": false, "adx": false, "ss": true, "pni": true, "svm_lock": false, "svm-lock": false, "smep": false, "pfthreshold": false, "smap": false, "x2apic": true, "avx512vbmi": false, "i64": true, "flushbyasid": false, "f16c": false, "ace2-en": false, "pat": true, "pae": true, "sse": true, "phe-en": false, "kvm-nopiodelay": true, "kvm_nopiodelay": true, "tm": false, "kvmclock-stable-bit": true, "hypervisor": true, "socket-id": -1, "pcommit": false, "syscall": true, "level": 11, "avx512dq": false, "svm": false, "full-cpuid-auto-level": true, "invtsc": false, "sse3": true, "sse2": true, "est": false, "avx512ifma": false, "tm2": false, "kvm-pv-eoi": true, "cx8": true, "kvm-mmu": false, "kvm_mmu": false, "sse4_2": true, "sse4.2": true, "sse4-2": true, "pge": true, "fill-mtrr-mask": true, "pdcm": false, "nodeid_msr": false, "model": 47, "movbe": false, "nrip-save": false, "nrip_save": false, "sse4a": false, "ssse3": true, "kvm_pv_unhalt": true, "invpcid": false, "pdpe1gb": true, "tsc-deadline": true, "fma": false, "cx16": true, "de": true, "enforce": false, "stepping": 2, "xsave": false, "clflush": true, "skinit": false, "tce": false, "tsc": true, "fpu": true, "ds-cpl": false, "ds_cpl": false, "ibs": false, "host-phys-bits": true, "fma4": false, "la57": false, "osvw": false, "check": true, "hv-spinlocks": -1, "pmm": false, "apic": true, "pmu": false, "min-xlevel2": 0, "tsc-adjust": true, "tsc_adjust": true, "kvm-steal-time": true, "kvm_steal_time": true, "kvmclock": true, "l3-cache": true, "lwp": false, "xop": false, "avx": false, "ospke": false, "ace2": false, "acpi": false, "avx512bw": false, "hv-vapic": false, "fsgsbase": false, "ht": false, "nx": true, "pclmulqdq": true, "mmxext": false, "popcnt": true, "xsaves": false, "lm": true, "umip": false, "avx2": false, "pse": true, "sep": true, "pclmuldq": true, "nodeid-msr": false, "kvm": true, "misalignsse": false, "min-xlevel": 2147483656, "bmi2": false, "bmi1": false, "kvm-pv-unhalt": true, "realized": false, "tsc-scale": false, "tsc_scale": false, "topoext": false, "xlevel2": 0, "clflushopt": false, "kvm-no-smi-migration": false, "monitor": false, "avx512er": false, "pmm-en": false, "pcid": true, "3dnow": false, "erms": false, "lahf-lm": true, "lahf_lm": true, "xstore": false, "fxsr-opt": false, "fxsr_opt": false, "rtm": false, "lmce": true, "hv-time": false, "perfctr-nb": false, "perfctr_nb": false, "ffxsr": false, "rdrand": false, "rdseed": false, "avx512-4vnniw": false, "vme": true, "vmx": false, "dtes64": false, "mtrr": true, "rdtscp": true, "pse36": true, "tbm": false, "wdt": false, "pause_filter": false, "model-id": "       Intel(R) Xeon(R) CPU E7- 4830  @ 2.13GHz", "sha-ni": false, "abm": false, "avx512pf": false, "xstore-en": false}}}, "id": "model-expansion"}
{"return": [{"name": "max", "typename": "max-x86_64-cpu", "unavailable-features": [], "static": false, "migration-safe": false}, {"name": "host", "typename": "host-x86_64-cpu", "unavailable-features": [], "static": false, "migration-safe": false}, {"name": "base", "typename": "base-x86_64-cpu", "unavailable-features": [], "static": true, "migration-safe": true}, {"name": "qemu64", "typename": "qemu64-x86_64-cpu", "unavailable-features": [], "static": false, "migration-safe": true}, {"name": "qemu32", "typename": "qemu32-x86_64-cpu", "unavailable-features": [], "static": false, "migration-safe": true}, {"name": "phenom", "typename": "phenom-x86_64-cpu", "unavailable-features": ["mmxext", "fxsr-opt", "3dnowext", "3dnow", "abm", "sse4a", "npt"], "static": false, "migration-safe": true}, {"name": "pentium3", "typename": "pentium3-x86_64-cpu", "unavailable-features": [], "static": false, "migration-safe": true}, {"name": "pentium2", "typename": "pentium2-x86_64-cpu", "unavailable-features": [], "static": false, "migration-safe": true}, {"name": "pentium", "typename": "pentium-x86_64-cpu", "unavailable-features": [], "static": false, "migration-safe": true}, {"name": "n270", "typename": "n270-x86_64-cpu", "unavailable-features": ["movbe"], "static": false, "migration-safe": true}, {"name": "kvm64", "typename": "kvm64-x86_64-cpu", "unavailable-features": [], "static": false, "migration-safe": true}, {"name": "kvm32", "typename": "kvm32-x86_64-cpu", "unavailable-features": [], "static": false, "migration-safe": true}, {"name": "cpu64-rhel6", "typename": "cpu64-rhel6-x86_64-cpu", "unavailable-features": ["abm", "sse4a"], "static": false, "migration-safe": true}, {"name": "coreduo", "typename": "coreduo-x86_64-cpu", "unavailable-features": [], "static": false, "migration-safe": true}, {"name": "core2duo", "typename": "core2duo-x86_64-cpu", "unavailable-features": [], "static": false, "migration-safe": true}, {"name": "athlon", "typename": "athlon-x86_64-cpu", "unavailable-features": ["mmxext", "3dnowext", "3dnow"], "static": false, "migration-safe": true}, {"name": "Westmere", "typename": "Westmere-x86_64-cpu", "unavailable-features": [], "static": false, "migration-safe": true}, {"name": "Skylake-Client", "typename": "Skylake-Client-x86_64-cpu", "unavailable-features": ["fma", "movbe", "xsave", "avx", "f16c", "rdrand", "fsgsbase", "bmi1", "hle", "avx2", "smep", "bmi2", "erms", "invpcid", "rtm", "mpx", "rdseed", "adx", "smap", "abm", "3dnowprefetch", "xsaveopt", "xsavec", "xgetbv1", "xsave", "xsave", "avx", "mpx", "mpx"], "static": false, "migration-safe": true}, {"name": "SandyBridge", "typename": "SandyBridge-x86_64-cpu", "unavailable-features": ["xsave", "avx", "xsaveopt", "xsave", "xsave", "avx"], "static": false, "migration-safe": true}, {"name": "Penryn", "typename": "Penryn-x86_64-cpu", "unavailable-features": [], "static": false, "migration-safe": true}, {"name": "Opteron_G5", "typename": "Opteron_G5-x86_64-cpu", "unavailable-features": ["fma", "xsave", "avx", "f16c", "abm", "sse4a", "misalignsse", "3dnowprefetch", "xop", "fma4", "tbm", "xsave", "xsave", "avx"], "static": false, "migration-safe": true}, {"name": "Opteron_G4", "typename": "Opteron_G4-x86_64-cpu", "unavailable-features": ["xsave", "avx", "abm", "sse4a", "misalignsse", "3dnowprefetch", "xop", "fma4", "xsave", "xsave", "avx"], "static": false, "migration-safe": true}, {"name": "Opteron_G3", "typename": "Opteron_G3-x86_64-cpu", "unavailable-features": ["abm", "sse4a", "misalignsse"], "static": false, "migration-safe": true}, {"name": "Opteron_G2", "typename": "Opteron_G2-x86_64-cpu", "unavailable-features": [], "static": false, "migration-safe": true}, {"name": "Opteron_G1", "typename": "Opteron_G1-x86_64-cpu", "unavailable-features": [], "static": false, "migration-safe": true}, {"name": "Nehalem", "typename": "Nehalem-x86_64-cpu", "unavailable-features": [], "static": false, "migration-safe": true}, {"name": "IvyBridge", "typename": "IvyBridge-x86_64-cpu", "unavailable-features": ["xsave", "avx", "f16c", "rdrand", "fsgsbase", "smep", "erms", "xsaveopt", "xsave", "xsave", "avx"], "static": false, "migration-safe": true}, {"name": "Haswell", "typename": "Haswell-x86_64-cpu", "unavailable-features": ["fma", "movbe", "xsave", "avx", "f16c", "rdrand", "fsgsbase", "bmi1", "hle", "avx2", "smep", "bmi2", "erms", "invpcid", "rtm", "abm", "xsaveopt", "xsave", "xsave", "avx"], "static": false, "migration-safe": true}, {"name": "Haswell-noTSX", "typename": "Haswell-noTSX-x86_64-cpu", "unavailable-features": ["fma", "movbe", "xsave", "avx", "f16c", "rdrand", "fsgsbase", "bmi1", "avx2", "smep", "bmi2", "erms", "invpcid", "abm", "xsaveopt", "xsave", "xsave", "avx"], "static": false, "migration-safe": true}, {"name": "Conroe", "typename": "Conroe-x86_64-cpu", "unavailable-features": [], "static": false, "migration-safe": true}, {"name": "Broadwell", "typename": "Broadwell-x86_64-cpu", "unavailable-features": ["fma", "movbe", "xsave", "avx", "f16c", "rdrand", "fsgsbase", "bmi1", "hle", "avx2", "smep", "bmi2", "erms", "invpcid", "rtm", "rdseed", "adx", "smap", "abm", "3dnowprefetch", "xsaveopt", "xsave", "xsave", "avx"], "static": false, "migration-safe": true}, {"name": "Broadwell-noTSX", "typename": "Broadwell-noTSX-x86_64-cpu", "unavailable-features": ["fma", "movbe", "xsave", "avx", "f16c", "rdrand", "fsgsbase", "bmi1", "avx2", "smep", "bmi2", "erms", "invpcid", "rdseed", "adx", "smap", "abm", "3dnowprefetch", "xsaveopt", "xsave", "xsave", "avx"], "static": false, "migration-safe": true}, {"name": "486", "typename": "486-x86_64-cpu", "unavailable-features": [], "static": false, "migration-safe": true}], "id": "definitions"}
{"return": {}}
{"timestamp": {"seconds": 1506477901, "microseconds": 244796}, "event": "SHUTDOWN", "data": {"guest": false}}
Comment 5 Jiri Denemark 2017-10-04 15:00:18 UTC 
Patches sent for review upstream: https://www.redhat.com/archives/libvir-list/2017-October/msg00134.html
Comment 6 Jiri Denemark 2017-10-16 07:46:19 UTC 
commit 9c9620af1d09efdc327c91d4e94e6ff9bc22c556
Refs: v3.8.0-99-g9c9620af1d
Author:     Jiri Denemark <jdenemar>
AuthorDate: Fri Oct 13 18:17:52 2017 +0200
Commit:     Jiri Denemark <jdenemar>
CommitDate: Mon Oct 16 09:23:20 2017 +0200

    cpu_x86: Disable blockers from unusable CPU models

    When decoding CPUID data to virCPUDef we need to be careful about using
    a CPU model which cannot be directly used on the current host. Normally,
    libvirt would notice the features which prevent the model from being
    usable and it would disable them in the computed virCPUDef, but this
    won't work in case the definition of the CPU model in QEMU contains more
    features than what we have in cpu_map.xml. We need to count with the
    usability blockers we got from QEMU and explicitly disable all of them
    to make the computed virCPUDef usable.

    https://bugzilla.redhat.com/show_bug.cgi?id=1464832

    Signed-off-by: Jiri Denemark <jdenemar>
    Reviewed-by: John Ferlan <jferlan>
Comment 8 Luyao Huang 2018-01-23 02:39:57 UTC 
Verify this bug with libvirt-3.9.0-8.el7.x86_64 on the same host:

1. check domcapabilities output (xsaveopt is disable):

  <cpu>
    <mode name='host-passthrough' supported='yes'/>
    <mode name='host-model' supported='yes'>
      <model fallback='forbid'>SandyBridge</model>
      <vendor>Intel</vendor>
      <feature policy='require' name='vme'/>
      <feature policy='require' name='ss'/>
      <feature policy='require' name='pcid'/>
      <feature policy='require' name='hypervisor'/>
      <feature policy='require' name='arat'/>
      <feature policy='require' name='tsc_adjust'/>
      <feature policy='require' name='pdpe1gb'/>
      <feature policy='require' name='invtsc'/>
      <feature policy='disable' name='xsave'/>
      <feature policy='disable' name='avx'/>
      <feature policy='disable' name='xsaveopt'/>
    </mode>


2. start a guest with check is full:

  <cpu mode='host-model' check='full'>
    <model fallback='forbid'/>
    <numa>
      <cell id='0' cpus='0-1' memory='512000' unit='KiB'/>
      <cell id='1' cpus='2-3' memory='512000' unit='KiB'/>
    </numa>
  </cpu>


3. check guest running xml:

  <cpu mode='custom' match='exact' check='full'>
    <model fallback='forbid'>SandyBridge</model>
    <vendor>Intel</vendor>
    <feature policy='require' name='vme'/>
    <feature policy='require' name='ss'/>
    <feature policy='require' name='pcid'/>
    <feature policy='require' name='hypervisor'/>
    <feature policy='require' name='arat'/>
    <feature policy='require' name='tsc_adjust'/>
    <feature policy='require' name='pdpe1gb'/>
    <feature policy='disable' name='xsave'/>
    <feature policy='disable' name='avx'/>
    <feature policy='disable' name='xsaveopt'/>
    <numa>
      <cell id='0' cpus='0-1' memory='512000' unit='KiB'/>
      <cell id='1' cpus='2-3' memory='512000' unit='KiB'/>
    </numa>
  </cpu>

4. check guest log there is no log like this:

warning: host doesn't support requested feature: CPUID.0DH:EAX.xsaveopt [bit 0]

5. change the guest cpu check to partial and none, and repeat the step 2-4, get the same result
Comment 12 errata-xmlrpc 2018-04-10 10:50:46 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/RHEA-2018:0704
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