[Xen-users] stubdom and VT-d passthrough? CPUID?

[Darren Foo <darrenfoo@xxxxxxxxx>]

Hi all,

I recently upgraded my Xen 3.2.1 to 3.3.1 on Centos 5.2. Everything seems to 
have gone pretty smoothly except I have a few issues. My system specs are:

4GB RAM
Q6600 quad core Intel CPU
P5E-VM DO Q35 Intel mobo (VT-d enabled)
Skystar2 DVB PCI card passed through to HVM DomU
HVM Windows XP SP3 DomU

1. When I restart my DomU, it shuts down and turns into Domain-Unnamed but 
doesn't restart. I did notice it restarts when using a stubdom however. I 
suspect it may have to do with the VT-d PCI passthrough device though.
2. I was able to configure my DomU HVM to use a stubdom, but my passthrough PCI 
device wil not show in the DomU. Does Xen support VT-d passthrough when using a 
stubdom?
3. With my 3.2.1 install, I couldn't use vcpu=2 for my HVM DomU, because RTSP 
streaming would fail. Someone mentioned to use timer_mode=1 but from what I 
read this  is the default now in the newer releases. RTSP streaming now works 
with vcpu=2 however there is a slight stuttering with the audio that I cannot 
seem to get rid of. I'm having trouble figuring out how to set the CPUID to a 
dual core instead of a dual cpu, can someone send me an example of a dual-core 
cpuid config for my hvm config? I'm hoping the CPUID may solve this stuttering 
audio issue.
4. What are the latest GPLPV drivers to use with a non-stubdom DomU? Are the 
GPLPV drivers still required with stubdom?

Thanks in advance.



      

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