Package: qemu-system-x86
Version: 1:7.0+dfsg-1
Severity: normal

Dear Maintainer,

VMs controlled by libvirt failed to start when using "host" cpu type with kvm
acceleration

libvirt log gives:

2022-04-21T17:07:40.354354Z qemu-system-x86_64: warning: This feature depends
on other features that were not requested: CPUID.8000000AH:EDX.npt [bit 0]
2022-04-21T17:07:40.354467Z qemu-system-x86_64: warning: This feature depends
on other features that were not requested: CPUID.8000000AH:EDX.nrip-save [bit
3]
2022-04-21T17:07:40.354476Z qemu-system-x86_64: warning: This feature depends
on other features that were not requested: CPUID.8000000AH:EDX.vmcb-clean [bit
5]
2022-04-21T17:07:40.354482Z qemu-system-x86_64: warning: This feature depends
on other features that were not requested: CPUID.8000000AH:EDX.svme-addr-chk
[bit 28]
2022-04-21T17:07:40.355818Z qemu-system-x86_64: warning: This feature depends
on other features that were not requested: CPUID.8000000AH:EDX.npt [bit 0]
2022-04-21T17:07:40.355850Z qemu-system-x86_64: warning: This feature depends
on other features that were not requested: CPUID.8000000AH:EDX.nrip-save [bit
3]
2022-04-21T17:07:40.355857Z qemu-system-x86_64: warning: This feature depends
on other features that were not requested: CPUID.8000000AH:EDX.vmcb-clean [bit
5]
2022-04-21T17:07:40.355864Z qemu-system-x86_64: warning: This feature depends
on other features that were not requested: CPUID.8000000AH:EDX.svme-addr-chk
[bit 28]
2022-04-21T17:07:40.419616Z qemu-system-x86_64: error: failed to set MSR
0xc0000104 to 0x100000000
qemu-system-x86_64: ../../target/i386/kvm/kvm.c:2996: kvm_buf_set_msrs:
Assertion `ret == cpu->kvm_msr_buf->nmsrs' failed.

Reverting to qemu-system-x86 6.2+dfsg-3 and the VMs start-up perfectly fine
using the same libvirt xml.

host cpu flags from /proc/cpuinfo :

        flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt
pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc rep_good nopl nonstop_tsc cpuid
extd_apicid pni monitor cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy
abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt nodeid_msr hw_pstate
vmmcall npt lbrv svm_lock nrip_save

Cheers,

Adrian


-- System Information:
Debian Release: bookworm/sid
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 5.16.0-5-amd64 (SMP w/2 CPU threads; PREEMPT)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8),
LANGUAGE=en_GB:en
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages qemu-system-x86 depends on:
ii  ipxe-qemu             1.0.0+git-20190125.36a4c85-5.1
ii  libaio1               0.3.113-2
ii  libbpf0               1:0.7.0-2
ii  libc6                 2.33-7
ii  libcapstone4          4.0.2-5
ii  libfdt1               1.6.1-1
ii  libfuse3-3            3.10.5-1
ii  libgcc-s1             12-20220319-1
ii  libglib2.0-0          2.72.1-1
ii  libgnutls30           3.7.4-2
ii  libibverbs1           39.0-1+b1
ii  libjpeg62-turbo       1:2.1.2-1
ii  libnettle8            3.7.3-1
ii  libnuma1              2.0.14-3
ii  libpixman-1-0         0.40.0-1
ii  libpmem1              1.11.1-3
ii  libpng16-16           1.6.37-3
ii  librdmacm1            39.0-1+b1
ii  libsasl2-2            2.1.28+dfsg-4
ii  libseccomp2           2.5.3-2
ii  libslirp0             4.6.1-1
ii  libudev1              250.4-1
ii  liburing2             2.1-2
ii  libvdeplug2           4.0.1-3
ii  libxendevicemodel1    4.16.0+51-g0941d6cb-1+b1
ii  libxenevtchn1         4.16.0+51-g0941d6cb-1+b1
ii  libxenforeignmemory1  4.16.0+51-g0941d6cb-1+b1
ii  libxengnttab1         4.16.0+51-g0941d6cb-1+b1
ii  libxenmisc4.16        4.16.0+51-g0941d6cb-1+b1
ii  libxenstore4          4.16.0+51-g0941d6cb-1+b1
ii  libxentoolcore1       4.16.0+51-g0941d6cb-1+b1
ii  libzstd1              1.5.2+dfsg-1
ii  qemu-system-common    1:7.0+dfsg-1
ii  qemu-system-data      1:7.0+dfsg-1
ii  seabios               1.15.0-1
ii  zlib1g                1:1.2.11.dfsg-4

Versions of packages qemu-system-x86 recommends:
ii  ovmf              2022.02-3
pn  qemu-block-extra  <none>
pn  qemu-system-gui   <none>
ii  qemu-utils        1:7.0+dfsg-1

Versions of packages qemu-system-x86 suggests:
ii  samba  2:4.16.0+dfsg-6
pn  vde2   <none>

-- no debconf information

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