Support for VIA Nano X2 L4350 => Fixed in SVN

[johanb]

The VIA Nano X2 L4350 processor supports hardware virtualization (Intel VT-x).

The CPU flag is recognized by VirtualBox:

00:00:00.369 VMX - Virtual Machine Technology = 0 (1)

But CPU itself is unknown:

00:00:00.502 HWACCM: No VT-x or AMD-V CPU extension found. Reason VERR_HWACCM_UNKNOWN_CPU
00:00:00.502 HWACCM: VMX MSR_IA32_FEATURE_CONTROL=0

VirtualBox guests therefor don't have hardware virtualization.

Would it be possible to support this CPU?

This is the contents of /proc/cpuinfo:

processor : 0
vendor_id : CentaurHauls
cpu family : 6
model : 15
model name : VIA Nano X2 L4350 @ 1.6+ GHz
stepping : 12
cpu MHz : 1733.569
cache size : 1024 KB
physical id : 0
siblings : 2
core id : 0
cpu cores : 1
apicid : 0
initial apicid : 0
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
   pat clflush acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm 
   constant_tsc rep_good nopl pni monitor vmx est tm2 ssse3 cx16 
   xtpr sse4_1 popcnt rng rng_en ace ace_en ace2 phe phe_en pmm pmm_en lahf_lm ida
bogomips : 3467.13
clflush size : 64
cache_alignment : 128
address sizes : 36 bits physical, 48 bits virtual
power management:

processor : 1
vendor_id : CentaurHauls
cpu family : 6
model : 15
model name : VIA Nano X2 L4350 @ 1.6+ GHz
stepping : 12
cpu MHz : 1733.569
cache size : 1024 KB
physical id : 0
siblings : 2
core id : 0
cpu cores : 1
apicid : 2
initial apicid : 2
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
   pat clflush acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm 
   constant_tsc rep_good nopl pni monitor vmx est tm2 ssse3 cx16 
   xtpr sse4_1 popcnt rng rng_en ace ace_en ace2 phe phe_en pmm pmm_en lahf_lm ida
bogomips : 3466.81
clflush size : 64
cache_alignment : 128
address sizes : 36 bits physical, 48 bits virtual
power management:

[Michael Thayer]

I'm afraid that we don't have any VIA hardware, and it is probably not an important market for us. If you could provide us with either hardware or a well-tested patch though we would consider supporting it.

[johanb]

VIA licensed VMX from Intel and it should be completely compatible.

Is there a way to force Virtualbox to use hardware virtualization?

[Frank Mehnert]

The next major release will support recent VIA CPUs. Thanks for VIA providing us test hardware!

[Frank Mehnert]

The fixes are part of VirtualBox 4.2 which was released today.