[Qemu-devel] Quick question on NVME on qemu

[Qemu-devel] Quick question on NVME on qemu

[sahlot arvind]

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Hello,

Does qemu emulate a proper NVMe controller?  Can someone please tell me how
can I use it to emulate a proper NVMe controller? Is there some way to
enable logging PCI accesses to NVMe controller so that I can see what
accesses my driver or OS is doing?

Thanks in advance!
Sahlot

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Re: [Qemu-devel] Quick question on NVME on qemu

[Igor Mammedov]

On Sat, 10 Oct 2015 00:39:43 -0700
sahlot arvind <asahlot@gmail.com> wrote:

> Hello,
> 
> Does qemu emulate a proper NVMe controller?  Can someone please tell me how
s far as I'm aware, QEMU doesn't emulate any NVMe controller yet.

> can I use it to emulate a proper NVMe controller? Is there some way to
> enable logging PCI accesses to NVMe controller so that I can see what
> accesses my driver or OS is doing?
> 
> Thanks in advance!
> Sahlot

Re: [Qemu-devel] Quick question on NVME on qemu

[Kevin Wolf]

Am 12.10.2015 um 10:05 hat Igor Mammedov geschrieben:
> On Sat, 10 Oct 2015 00:39:43 -0700
> sahlot arvind <asahlot@gmail.com> wrote:
> 
> > Hello,
> > 
> > Does qemu emulate a proper NVMe controller?  Can someone please tell me how
> s far as I'm aware, QEMU doesn't emulate any NVMe controller yet.

It does, though I'm not sure how complete it is. You can use it with
-drive file=...,if=none,id=some_id -device nvme,drive=some_id

Kevin

> > can I use it to emulate a proper NVMe controller? Is there some way to
> > enable logging PCI accesses to NVMe controller so that I can see what
> > accesses my driver or OS is doing?
> > 
> > Thanks in advance!
> > Sahlot
> 
> 

Re: [Qemu-devel] Quick question on NVME on qemu

[Keith Busch]

On Mon, 12 Oct 2015, Kevin Wolf wrote:
> Am 12.10.2015 um 10:05 hat Igor Mammedov geschrieben:
>> On Sat, 10 Oct 2015 00:39:43 -0700
>> sahlot arvind <asahlot@gmail.com> wrote:
>>
>>> Hello,
>>>
>>> Does qemu emulate a proper NVMe controller?  Can someone please tell me how
>> s far as I'm aware, QEMU doesn't emulate any NVMe controller yet.
>
> It does, though I'm not sure how complete it is. You can use it with
> -drive file=...,if=none,id=some_id -device nvme,drive=some_id

Yep, that's right. It is a basic 1.0 compliant (mostly) controller. There
are updates for up to 1.2 compliance that are in a public tree, but not
merged to mainline.

   http://git.infradead.org/users/kbusch/qemu-nvme.git

>>> can I use it to emulate a proper NVMe controller? Is there some way to
>>> enable logging PCI accesses to NVMe controller so that I can see what
>>> accesses my driver or OS is doing?

It's not a problem to add more NVMe features. There's currently no such
logging mechanism, though. It shouldn't be too difficult to add if you
want to take a stab at it.