From: "Christian Ehrhardt " <1722074@bugs.launchpad.net>
To: qemu-devel@nongnu.org
Subject: [Qemu-devel] [Bug 1722074] Re: warning: host doesn't support requested feature: CPUID.01H:ECX.vmx
Date: Mon, 17 Jun 2019 05:43:38 -0000 [thread overview]
Message-ID: <156075021900.24311.12735560103164691575.malone@gac.canonical.com> (raw)
In-Reply-To: 150746661053.7454.6898170418757179619.malonedeb@wampee.canonical.com
Hi,
Ken - I think all I said in comment #2 still applies (and likely won't change).
It really is a non-issue warning - and even if you e.g. have a zero-
warning-allowed policy then you can easily avoid that by using a CPU
type that doesn't enable it by default or switch it on/off as needed. In
libvirt that would be via CPU features [1] and in qemu via +/- flags on
the -cpu switch. Like [2] but for vmx/svm flags.
Note that:
$ qemu-system-x86_64 -cpu help
will show you all the types and features known to your current qemu.
[1]: https://libvirt.org/formatdomain.html#elementsCPU
[2]: https://www.berrange.com/posts/2018/06/29/cpu-model-configuration-for-qemu-kvm-on-x86-hosts/
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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.
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1722074/+subscriptions
prev parent reply other threads:[~2019-06-17 5:51 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-08 12:43 [Qemu-devel] [Bug 1722074] [NEW] warning: host doesn't support requested feature: CPUID.01H:ECX.vmx htmldeveloper
2017-10-08 12:53 ` [Qemu-devel] [Bug 1722074] " htmldeveloper
2018-05-23 21:16 ` Chris
2018-05-24 5:07 ` Christian Ehrhardt
2018-05-24 5:13 ` Christian Ehrhardt
2018-05-24 5:17 ` Christian Ehrhardt
2019-06-15 4:17 ` Ken Sharp
2019-06-17 5:43 ` Christian Ehrhardt [this message]
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