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

Usually, vt-d option is under the advanced chipset setting / northbridge 
setting. So please check whether your BIOS has such an entry. 

And also, for latest c/s, if vt-d is not enabled, there will be a warning for 
it when you create a HVM guest with vt-d assignment.

-- haicheng

-----Original Message-----
From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx 
[mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Jambunathan K
Sent: 2007年11月30日 22:04
To: Han, Weidong
Cc: xen-devel; Sanjeev Jorapur
Subject: Re: [Xen-devel] PCI Passthrough to HVM on xen-unstable

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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