Re: [Xen-devel] PCI Passthrough to HVM on xen-unstable

[Jambunathan K <jambunathan@xxxxxxxxxx>]

Han, Weidong wrote:
> Yes, VT-d is located at North bridge, not a processor feature. On BIOS,
> it should be under Chipset -> North Bridge settings. 
> 

Northbridge chipset on my machine is this: Intel Corporation 5000V Chipset
Memory Controller Hub (rev b1).

I need to have an Intel Q35 Express Chipset to get VT-d enabled.

At this point I need to shelve the idea of testing PCI Passthrough on HVM.
Thanks a lot for helping with my questions.

> 
> Jambunathan K wrote:
>> Han, Weidong wrote:
>>> Pls check your BIOS to see whether it's VT-d capable, and enable it
>>> first if you want to use it. Seems your configures are correct, pls
>>> check your BIOS.
>> I don't see an option for "Intel VT for Directed I/O" when "Intel
>> Virtualization Technology" is enabled. My understanding is that VT-d
>> is a motherboard feature and not a processor feature.
>>
>> I have done some limited research looking around. I am confused
>> whether I can get VT-d to work with just a BIOS upgrade or I would be
>> required to upgrade my box altogther. If you have some info off the
>> top of your head to clarify things for me, I would appreciate it.
>>
>>> Jambunathan K wrote:
>>>> (Resubmitting my original post with 'xm dmesg' output)
>>>>
>>>> I am working on S5000VSA Intel Server Board with the following cpu
>>>> spec. 
>>>>
>>>> XEN-PEER-RHEL5 $ cat /proc/cpuinfo
>>>> processor       : 0
>>>> vendor_id       : GenuineIntel
>>>> cpu family      : 6
>>>> model           : 15
>>>> model name      : Intel(R) Xeon(R) CPU           E5345  @ 2.33GHz
>>>> stepping        : 7 cpu MHz         : 2327.512
>>>> cache size      : 4096 KB
>>>> physical id     : 0
>>>> siblings        : 1
>>>> core id         : 0
>>>> cpu cores       : 1
>>>> fpu             : yes
>>>> fpu_exception   : yes
>>>> cpuid level     : 10
>>>> wp              : yes
>>>> flags           : fpu de tsc msr pae mce cx8 apic sep mtrr mca cmov
>>>> pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx lm
>>>> constant_tsc up pni monitor ds_cpl vmx est tm2 cx16 xtpr lahf_lm
>>>> bogomips        : 4661.90 clflush size    : 64
>>>> cache_alignment : 64
>>>> address sizes   : 36 bits physical, 48 bits virtual
>>>> power management:
>>>>
>>>> Is my box vt-d capable? If the answer is yes proceed ahead to the
>>>> details. If the answer is no, how can a novice user like me
>>>> identify whether or not his box is vt-d capable.
> 


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