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

["Brian P. Martin" <Brian@xxxxxxxxxxxxxxxxxxxx>]

Awesome, Doug!  I've been on that wild goose chase for quite a while.  

I've been trying to figure out why a DomU guest can't see a parallel port
(either the one on the mobo or another on a PCI card).  I thought it was
because I didn't have SVM active for some reason.  I'm still stuck, but at
least now I'm stuck on the right problem.  

The few minutes you spent responding has saved me many hours of wasted
effort.  Thanks a lot.

                               -Brian M.

> -----Original Message-----
> From: djmagee@xxxxxxxxxxxx [mailto:djmagee@xxxxxxxxxxxx]
> Sent: Monday, July 27, 2009 1:18 PM
> To: Brian P. Martin
> Cc: xen-users@xxxxxxxxxxxxxxxxxxx
> Subject: RE: [Xen-users] SVM not detected on Opteron 1220
> 
> 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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