uest know that the jobs he sent on the virtqueue were discarded
so that he can retry or release resources that were used for managing those
jobs/packets?
Catalin Vasile
Yes it is.
Thanks
From: Stefan Hajnoczi
Sent: Thursday, May 5, 2016 9:00:33 PM
To: Catalin Vasile
Cc: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] virtio-net and vhost-net init, virtio-scsi and
vhost-scsi init
On Thu, May 05, 2016 at 11:05:27AM +
When the virtio-net and virtio-scsi drivers have done the probe() primitive
they set the DRIVER_OK flag.
If the vhost kernel backend is used, the set_status() primitive in qemu will be
triggered with DRIVER_OK status and it will trigger vhost_XXX_start().
How does the net and scsi solutions ens
Do you mean vhost_net - old kernel, qemu - latest, guest - latest?
On Thu, Jul 16, 2015 at 7:33 PM, Stefan Hajnoczi wrote:
> On Thu, Jul 16, 2015 at 1:54 PM, Catalin Vasile
> wrote:
>> Both. The compiled kernel was common for both.
>
> Does vhost_net work with the old kerne
Both. The compiled kernel was common for both.
On Thu, Jul 16, 2015 at 3:52 PM, Stefan Hajnoczi wrote:
> On Thu, Jul 09, 2015 at 01:45:50PM +0300, Catalin Vasile wrote:
>> I have managed to deal with it.
>> The thing is I was using one of the latest versions of qemu, but an
>
I have managed to deal with it.
The thing is I was using one of the latest versions of qemu, but an
old Linux Kernel version of 3.12.
On Thu, Jul 9, 2015 at 1:43 PM, Stefan Hajnoczi wrote:
> On Tue, Jul 07, 2015 at 02:43:06PM +0300, Catalin Vasile wrote:
>> My vhost module respects t
Jul 7, 2015 at 1:17 PM, Stefan Hajnoczi wrote:
> On Mon, Jul 06, 2015 at 06:13:29PM +0300, Catalin Vasile wrote:
>> What is the logic behind vring_need_event() when used with
>> virtqueue_kick_prepare()?
>> What does the keyword >>just<< refer to from the following
What is the logic behind vring_need_event() when used with
virtqueue_kick_prepare()?
What does the keyword >>just<< refer to from the following context:
/* The following is used with USED_EVENT_IDX and AVAIL_EVENT_IDX */
/* Assuming a given event_idx value from the other size, if
* we have just in
hu, Jun 11, 2015 at 5:26 PM, Catalin Vasile
wrote:
> Is there something I need to install (kernel module or something like
> that) so that the virtio guest receives signals from vhost?
> The communication from and to qemu works (I can send a message from
> guest to qemu, and I can send
Is there something I need to install (kernel module or something like
that) so that the virtio guest receives signals from vhost?
The communication from and to qemu works (I can send a message from
guest to qemu, and I can send a message from qemu to guest), and I can
send a message from guest to v
The problem was that my device started having activity before the
backend was finished to be set up.
On Wed, Jun 10, 2015 at 12:26 PM, Catalin Vasile
wrote:
> When is VIRTIO_CONFIG_S_DRIVER_OK set?
> I've seen in vhost-scsi from qemu, that it sets it's own set_status()
> me
When is VIRTIO_CONFIG_S_DRIVER_OK set?
I've seen in vhost-scsi from qemu, that it sets it's own set_status()
member function for a virtio object, which checks for
VIRTIO_CONFIG_S_DRIVER_OK (from a status variable received as a
parameter) so it knows if it has to call vhost_scsi_start(),
vhost_scsi_
If I send to the backend out buffers using multiple sgs, what should I
expect when the user sends me back the result? What should I expect to
get when I do a virtqueue_get_buf()?
Do I need to make multiple calls to virtqueue_get_buf() in order to
get all my out buffers? Or it returns with the first
>From what I see, there are no sync primitives used on virtqueues in
the guest driver.
How does it make sure start_xmit() (for example) is not called
multiple times, so that the vq internal control data doesn't get
destroyed?
Is eventfd blocking? By that I mean: If I signal the guest for
something, will that thread remain blocked till the guest clears the
interrupt?
Can I use a virtqueue asynchronously between guest and backend?
By that I mean that any end of the communication channel (virtqueue)
can push/pop how much data he wants anytime, without worrying that it
will pop a thing that it pushed on the queue, and in fact the other
end should have popped it? O
Can virtqueues be used asynchronous from the vhost end?
>From what I've seen there are some primitives with
"*add_used_and_signal*" which update some indexes behind the scene.
Could marking and signaling used buffers (in another order other than
the way they were received) mess up cleaning and/or o
On Fri, Apr 24, 2015 at 12:05 PM, Paolo Bonzini wrote:
>
>
> On 24/04/2015 10:46, Catalin Vasile wrote:
>> Does a physical memory address in a guest points to the same memory as qemu?
>> For example: if I have a physical pointer 0x34 in the guest, does it
>> point to
Does a physical memory address in a guest points to the same memory as qemu?
For example: if I have a physical pointer 0x34 in the guest, does it
point to the same location that qemu points with 0x34 address?
Sorry for not respoding there.
When I started researching and working on this qemu-devel was the only
mailing list where I actually got support (answers)
for my questions.
On Tue, Apr 21, 2015 at 4:33 PM, Stefan Hajnoczi wrote:
> On Fri, Apr 17, 2015 at 02:03:59PM +0300, Catalin Vasile wr
If I send a pointer to a vhost server from a virtio driver, do I have to do
anything else before I can call copy_from_user() or copy_to_user() on that
pointer?
Does loadvm create new virtual devices (dev.init(), dev.realize(), etc.)
for the vm to run onto and then load VMStateDescription?
On Fri, Apr 17, 2015 at 4:40 PM, Peter Maydell
wrote:
> On 17 April 2015 at 14:03, Catalin Vasile
> wrote:
> > When are save() and load() handlers a
When are save() and load() handlers actually used?
When are they trying to save and restore state?
I am working on a virtio-crypto with vhost backend.
This functionality should expose a virtual cryptographic device to the
guest which would send crypto jobs to the host.
One problem I am facing is where to store session data (such as keys, IVs,
etc.).
For performance improvements, I would be ideal
How can I tell which virtqueue is which?
I'm trying to make 2 virtqueues:
1) control vq between qemu and guest
2) data/job vq between vhost and guest
I went through find_vqs() inside the guest (virtio-net), but I can't
tell how it associates which one is the rx queue, which one is tx, and
which on
Awesome.
Thanks
On Tue, Apr 7, 2015 at 11:51 AM, Greg Kurz wrote:
> On Tue, 7 Apr 2015 11:10:07 +0300
> Catalin Vasile wrote:
>
>> I am using the virtio-net vhost-net model to make another virtio/vhost
>> solution.
>> I can't seem to find how does one make a vir
I am using the virtio-net vhost-net model to make another virtio/vhost solution.
I can't seem to find how does one make a virtqueue to only be consumed
by vhost when adding notifiers to vhost.
virtio_add_queue() seems to always ask for a valid handle for qemu,
and I don't see any disable function p
I'm trying to test something I'm working on qemu-kvm and I ran into a segfault.
I usually use valgrind to deal with these kind of issues, but when I
try to used it on
qemu it goes nuts and shows me this error and closes:
getauxval AT_DCACHEBSIZE failed
Is it because I use hugetlb ? Or do any of yo
How can I debug errors like this:
qemu-system-ppc[2273]: unhandled signal 11 at 0008 nip 1007ed08 lr
103404e0 code 30001
?
I know it is a ppc binary, but I am asking a general question.
>From a first impression it looks a little like Linux Kernel Oops messages.
How can I actually find out the l
Hi,
My name is Catalin Vasile and I want to participate with a project for qemu
at GSoC.
>From what I understand from the rules, I can participate with things I
could also use for my college projects.
This is my last bachelor year and I'm doing my diploma project, which is
re
Is there any documentation on error reporting in qemu?
I've seen a lot of diverse methods used to report errors in sanity checks
and I don't know which one should I use and when.
Why do vhost init/start functions put out with the work of using a
vhost_call(VHOST_NET_SET_BACKEND) with file.fd = -1 in qemu vhost-net
sources?
>From what I see in vhost-net kernel module it just returns NULL from
get_socket(), and that's it.
It doesn't set anything.
Hi,
I'm new to qemu-devel and I'm trying to add a ".c" source to qemu.
To be more specific, I'm trying to add a file into /hw/virtio/.
I've added "common-obj-y += virtio-src.o" to the Makefile.objs in that
folder
and when I'm compiling qemu it seems to compile the sources, but I don't
know
if they
Hi,
I'm new to qemu-devel and I'm trying to add a ".c" source to qemu.
To be more specific, I'm trying to add a file into /hw/virtio/.
I've added "common-obj-y += virtio-src.o" to the Makefile.objs in that folder
and when I'm compiling qemu it seems to compile the sources, but I don't know
if they
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