RE: [Xen-users] SVM not detected on Opteron 1220

[<djmagee@xxxxxxxxxxxx>]

I believe this is normal (though I don't have any AMD hardware, it
should be the same as vmx flag on intel).  Xen masks certain bits in the
cpu information, and Dom0 does not have direct access to the physical
CPUs, only the virtual CPUs assigned by the hypervisor.

To verify you have svm enabled, you will want to look at the output of
"xm info", specifically the line that starts "xen_caps".  If you have
entries there that start with "hvm" then your hardware supports
virtualization.

Doug Magee

-----Original Message-----
From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
[mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Brian P.
Martin
Sent: Monday, July 27, 2009 2:14 PM
To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-users] SVM not detected on Opteron 1220

I have SuperMicro mainboard, H8SMi-2 rev 2.01, with a dual core Opteron
1220
processor.  I've verified that the BIOS had "Secure Virtual Machine"
enabled.  This appears to be the only virtualization option in the BIOS.
I'm running xen 3.3.1 and kernel-xen-base 2.6.27.  When I boot up the
"svm"
flag doesn't appear in the /proc/cpuinfo flags area (full cpuinfo shown
at
bottom).  In essence, it seems that the BIOS says virtualization is
enabled,
but Linux says it isn't.

I tried updating the BIOS to the latest version, but that didn't change
anything. 
Does anyone have any recommendations as to how to proceed?  Any advice
would
be greatly appreciated.

                                         -Brian M.

/proc/cpuinfo:

processor       : 0
vendor_id       : AuthenticAMD
cpu family      : 15
model           : 67
model name      : Dual-Core AMD Opteron(tm) Processor 1220
stepping        : 3
cpu MHz         : 2814.456
cache size      : 1024 KB
physical id     : 0
siblings        : 1
core id         : 0
cpu cores       : 1
apicid          : 0
initial apicid  : 0
fpu             : yes
fpu_exception   : yes
cpuid level     : 1
wp              : yes
flags           : fpu de tsc msr pae cx8 apic mtrr cmov pat clflush mmx
fxsr
sse sse2 ht syscall nx mmxext fxsr_opt lm 3dnowext 3dnow rep_good nopl
pni
cx16 lahf_lm cmp_legacy extapic cr8_legacy
bogomips        : 5630.48
TLB size        : 1024 4K pages
clflush size    : 64
cache_alignment : 64
address sizes   : 40 bits physical, 48 bits virtual
power management: ts fid vid ttp tm stc

processor       : 1
vendor_id       : AuthenticAMD
cpu family      : 15
model           : 67
model name      : Dual-Core AMD Opteron(tm) Processor 1220
stepping        : 3
cpu MHz         : 2814.456
cache size      : 1024 KB
physical id     : 0
siblings        : 1
core id         : 1
cpu cores       : 1
apicid          : 1
initial apicid  : 1
fpu             : yes
fpu_exception   : yes
cpuid level     : 1
wp              : yes
flags           : fpu de tsc msr pae cx8 apic mtrr cmov pat clflush mmx
fxsr
sse sse2 ht syscall nx mmxext fxsr_opt lm 3dnowext 3dnow rep_good nopl
pni
cx16 lahf_lm cmp_legacy extapic cr8_legacy
bogomips        : 5630.48
TLB size        : 1024 4K pages
clflush size    : 64
cache_alignment : 64
address sizes   : 40 bits physical, 48 bits virtual
power management: ts fid vid ttp tm stc


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