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Re: [Qemu-discuss] qemu -cpu host


From: akhilesh rawat
Subject: Re: [Qemu-discuss] qemu -cpu host
Date: Mon, 6 Feb 2017 16:06:28 +0530

hello,

Like below list goes missing : dts acpi ht tm pbe arch_perfmon xtopology nonstop_tsc aperfmperf dtes64 monitor ds_cpl xtpr pdcm pcid

And dues to this My nested Guest show error like . Here constant _tsc is miiing from guest

2017-02-04T16:21:06.000 2461: error : qemuMonitorIO:697 : internal error: early end of file from monitor: possible problem:
EAL: WARNING: Address Space Layout Randomization (ASLR) is enabled in the kernel.
EAL:    This may cause issues with mapping memory into secondary processes
EAL: WARNING: cpu flags constant_tsc=yes nonstop_tsc=no -> using unreliable clock cycles !
Could not allocate dynamic translator buffer



Guest :


processor    : 19
vendor_id    : GenuineIntel
cpu family    : 6
model        : 42
model name    : Intel Xeon E312xx (Sandy Bridge)
stepping    : 1
microcode    : 0x1
cpu MHz        : 1995.266
cache size    : 4096 KB
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 ss syscall nx pdpe1gb rdtscp lm constant_tsc rep_good nopl eagerfpu pni pclmulqdq vmx ssse3 cx16 pcid sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer aes xsave avx hypervisor lahf_lm xsaveopt tpr_shadow vnmi flexpriority ept vpid
bogomips    : 4013.27
clflush size    : 64
cache_alignment    : 64
address sizes    : 46 bits physical, 48 bits virtual
power management:

HOst :

processor    : 23
vendor_id    : GenuineIntel
cpu family    : 6
model        : 45
model name    : Intel(R) Xeon(R) CPU E5-2620 0 @ 2.00GHz
stepping    : 7
microcode    : 0x710
cpu MHz        : 1400.000
cache size    : 15360 KB
physical id    : 1
siblings    : 12
core id        : 5
cpu cores    : 6
apicid        : 43
initial apicid    : 43
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 dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer aes xsave avx lahf_lm ida arat epb pln pts dtherm tpr_shadow vnmi flexpriority ept vpid xsaveopt
bogomips    : 4004.01
clflush size    : 64
cache_alignment    : 64
address sizes    : 46 bits physical, 48 bits virtual
power management:

Thanks
-Aki

On Mon, Feb 6, 2017 at 4:00 PM, Vincenzo Romano <address@hidden> wrote:
Which features are you expecting that you see missing?
--
Vincenzo Romano - NotOrAnd.IT
Information Technologies
--
NON QVIETIS MARIBVS NAVTA PERITVS


2017-02-06 11:27 GMT+01:00 akhilesh rawat <address@hidden>:
> Hello,
>
>
> I want to  pass all available host processor features to the guest, and I
> used the command line switch
>
>  qemu -cpu host
>
> Still I see number of missing features on Guest .
>
> What could be the reason ?
>
> -aki


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