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[Qemu-devel] [Bug 1722074] Re: warning: host doesn't support requested f
From: |
Christian Ehrhardt |
Subject: |
[Qemu-devel] [Bug 1722074] Re: warning: host doesn't support requested feature: CPUID.01H:ECX.vmx |
Date: |
Thu, 24 May 2018 05:07:40 -0000 |
** 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
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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.
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