[Qemu-devel] [Bug 1722074] Re: warning: host doesn't support requested feature: CPUID.01H:ECX.vmx

[" Christian Ehrhardt " <1722074@bugs.launchpad.net>]

** Also affects: qemu (Ubuntu)
   Importance: Undecided
       Status: New

** Changed in: qemu
       Status: New => Incomplete

** Changed in: qemu
       Status: Incomplete => Opinion

** Changed in: qemu
       Status: Opinion => Invalid

** Changed in: qemu (Ubuntu)
       Status: New => Incomplete

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1722074

Title:
  warning: host doesn't support requested feature: CPUID.01H:ECX.vmx

Status in QEMU:
  Invalid
Status in qemu package in Ubuntu:
  Confirmed

Bug description:
  
  I encountered the bug today (when using qemu to boot up images - which used to work on my Intel CPU box):

  warning: host doesn't support requested feature: CPUID.01H:ECX.vmx

  The bug is a show-stopper - I completely cannot load my kernel images
  at all.

  My Ubuntu have this version of QEMU installed:

  qemu-system-x86_64 --version

  QEMU emulator version 2.5.0 (Debian 1:2.5+dfsg-5ubuntu10.16),
  Copyright (c) 2003-2008 Fabrice Bellard

  And PC is a AMD Ryzen7 CPU built, and this is the first time I am
  using it to load QEMU images.   My host information:

  cat /proc/cpuinfo |more

  processor	: 0
  vendor_id	: AuthenticAMD
  cpu family	: 23
  model		: 1
  model name	: AMD Ryzen 7 1700X Eight-Core Processor
  stepping	: 1
  microcode	: 0x800110e
  cpu MHz		: 2200.000
  cache size	: 512 KB
  physical id	: 0
  siblings	: 16
  core id		: 0
  cpu cores	: 8
  apicid		: 0
  initial apicid	: 0
  fpu		: yes
  fpu_exception	: yes
  cpuid level	: 13
  wp		: yes
  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 constant_tsc rep_good nopl nonstop_tsc extd_apicid aperfmperf pni pclmulqdq
  monitor ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand lahf
  _lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw s
  kinit wdt tce topoext perfctr_core perfctr_nb bpext perfctr_l2 mwaitx hw_pstate
  vmmcall fsgsbase bmi1 avx2 smep bmi2 rdseed adx smap clflushopt sha_ni xsaveopt
  xsavec xgetbv1 xsaves clzero irperf arat npt lbrv svm_lock nrip_save tsc_scale v
  mcb_clean flushbyasid decodeassists pausefilter pfthreshold avic overflow_recov
  succor smca
  bugs		: fxsave_leak sysret_ss_attrs null_seg
  bogomips	: 6787.24
  TLB size	: 2560 4K pages
  clflush size	: 64
  cache_alignment	: 64
  address sizes	: 48 bits physical, 48 bits virtual
  power management: ts ttp tm hwpstate eff_freq_ro [13] [14]

  processor	: 1
  vendor_id	: AuthenticAMD
  cpu family	: 23
  model		: 1
  model name	: AMD Ryzen 7 1700X Eight-Core Processor
  stepping	: 1
  microcode	: 0x800110e
  cpu MHz		: 2200.000
  cache size	: 512 KB

  From other places, it can be seen that this is an AMD CPU issue:

  https://www.virtualmin.com/node/52227

  not sure?

  The bug will also affect the host negatively:  it will completely go
  into a hung mode - the entire host becomes completely unsable.

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1722074/+subscriptions