Re: Can KVM PassThrough specifically my PCI cards to fully-virt'd KVM Guests with my CPU? Yet?

2010-01-26 Thread Ben DJ 
On Mon, Jan 25, 2010 at 10:51 PM, Brian Jackson i...@theiggy.com wrote:
 Nope. When support was being developed, there was, but it was never merged,
 and I highly doubt the patches would be remotely able to be applied at this
 point with all the code churn qemu has had.

Then, I'm stuck on xen.  :-(

Thanks for the explanation.

BenDJ
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Can KVM PassThrough specifically my PCI cards to fully-virt'd KVM Guests with my CPU? Yet?

2010-01-25 Thread Ben DJ 
Hi,

I have a box with an AMD Phenom II X4 920 CPU

Reading http://www.linux-kvm.org/page/FAQ#What_do_I_need_to_use_KVM.3F,
I've verified with 'cat /proc/cpuinfo' that the CPU has the AMD-V
svm extension.

I'm specifically interested in whether or not this CPU's capabilities
will allow PCI PassThrough of hardware from the Host to the Guest.
I've read the KVM 'ToDo'  'FAQ', and tbh am unclear if everything I
need is actually in KVM already.  It's just that I don't get all the
terminology yet.

I've read that VideoCards are still a no-go. NP for me, atm.

The cards I'm interested in are:

 -- a SiliconImage 3124 (sil24 module) based SATA card -- RAID
capable, but I'm only using it to attach drives, and doing the RAID
with Linux's 'md', and,
 -- A number of Gigabit NICs, including an Intel e1000 card.

I'm thoroughly confused as to whether or not I can PassThrough these
cards using this CPU, /or if I need AMD-Vi/IOMMU in hardware.  I
can't figure out if I do or don't ... AMD's product sheets have me
baffled -- and I haven't figured out if /proc/cpuinfo etc 'shows' me
definitively.

So, let's just ask this:  *can* I do hardware PassThrough of these PCI
cards from KVM Host to a fully virtualized KVM guest?  and, if 'yes',
is there a specific/minimum kernel version I need?

Thanks!

BenDJ
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Re: Can KVM PassThrough specifically my PCI cards to fully-virt'd KVM Guests with my CPU? Yet?

2010-01-25 Thread Ben DJ 
On Mon, Jan 25, 2010 at 9:44 PM, Brian Jackson i...@theiggy.com wrote:
 You do need iommu support in your system. Unfortunately there are very few AMD
 motherboards that have an iommu. Only 1 server level board I know of has one
 and is close to hitting the markets. So chances are you don't have one.

Well, rats.  Thx for a clear answer, though!

And, there's no iommu emulation in software for KVM that'd do it?

BenDJ
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