[ANNOUNCE] kvm-guest-drivers-linux-1

[ANNOUNCE] kvm-guest-drivers-linux-1

[Avi Kivity]

This is the first release of block and network drivers for Linux guests 
running on a kvm host.  The drivers are intended for guest kernels 
2.6.18-2.6.24.  Newer kernels include the drivers; older kernels may not 
work.  kvm-61 or later is needed in the host.

Network throughput is around 1 Gbit/sec; latency is currently a less 
than stellar 0.3 msec.  Both these figures will be improved in the future.

The drivers are available from the download page of the kvm website, below.

To use, download the drivers into the guest (using one of the emulated 
network cards), unpack the package, and type

  make
  sudo make install

You will need the kernel development package installed.

To use the drivers, reboot with '-net nic,model=virtio' instead of the 
usual setting, and 'modprobe virtio_net' to load the module.  Similarly 
use '-drive ...,if=virtio' for the block device, and the corresponding 
virtio_blk.ko.

Initial release:
- virtio pci driver (Anthony Liguori, Rusty Russell, Dor Laor)
- virtio network driver (Anthony Liguori, Rusty Russell, Dor Laor)
- virtio block driver (Anthony Liguori, Rusty Russell, Dor Laor)
- backports to Linux 2.6.18-2.6.24 (Anthony Liguori, Rusty Russell, Dor 
Laor)

http://kvm.qumranet.com/

-- 
Do not meddle in the internals of kernels, for they are subtle and quick to panic.


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Re: [ANNOUNCE] kvm-guest-drivers-linux-1

[Alexey Eremenko]

Very nice !

1. How about releasing those in ISO format instead (or in addition
to...) tarballs?

2. I have a problem compiling it.
"make sync LINUX=." fails.

I have read the README:
"Where /path/to/kernel is the path to a recent kernel tree containing virtio
drivers.  At the moment, this must be Rusty Russell's virtio patch queue[1]
applied on top of Linus' git tree[2]."

What does it means ? That I need kernel-2.6.25 sources?
Well, since we release a tarball, can we include part of 2.6.25 ?
It is a bit unclear, what must I do to compile it.

-- 
-Alexey Eremenko "Technologov"

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Re: [ANNOUNCE] kvm-guest-drivers-linux-1

[Anthony Liguori]

Alexey Eremenko wrote:
> Very nice !
>
> 1. How about releasing those in ISO format instead (or in addition
> to...) tarballs?
>   

It's not a bad idea.  What we really need is for people to submit 
spec/deb files for older distros.  Then it's a matter of compiling those 
RPMs/debs and putting them on an ISO.

> 2. I have a problem compiling it.
> "make sync LINUX=." fails.
>
> I have read the README:
> "Where /path/to/kernel is the path to a recent kernel tree containing virtio
> drivers.  At the moment, this must be Rusty Russell's virtio patch queue[1]
> applied on top of Linus' git tree[2]."
>   

The released tarball has already done a "make sync".  The README is out 
of date, it should work against Linus' latest git tree.

> What does it means ? That I need kernel-2.6.25 sources?
> Well, since we release a tarball, can we include part of 2.6.25 ?
> It is a bit unclear, what must I do to compile it.
>   

It should just be a matter of doing a make && make install in the guest.

Regards,

Anthony Liguori



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Re: [ANNOUNCE] kvm-guest-drivers-linux-1

[Jun Koi]

On 3/6/08, Avi Kivity <avi@qumranet.com> wrote:
> This is the first release of block and network drivers for Linux guests
>  running on a kvm host.  The drivers are intended for guest kernels
>  2.6.18-2.6.24.  Newer kernels include the drivers; older kernels may not
>  work.  kvm-61 or later is needed in the host.
>
>  Network throughput is around 1 Gbit/sec; latency is currently a less
>  than stellar 0.3 msec.  Both these figures will be improved in the future.
>
>  The drivers are available from the download page of the kvm website, below.
>
>  To use, download the drivers into the guest (using one of the emulated
>  network cards), unpack the package, and type
>
>   make
>   sudo make install
>
>  You will need the kernel development package installed.

Excellent, thanks!

Just 1 question: Above is the instruction for guest. How about the
host? Dont we need to install anything??

I suppose that qemu in the latest kvm package already supported
virtio, but I think we need some support from host kernel as well?

J

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Re: [ANNOUNCE] kvm-guest-drivers-linux-1

[Thomas Mueller]

> On 3/6/08, Avi Kivity <avi@qumranet.com> wrote:
>   
>> This is the first release of block and network drivers for Linux guests
>>  running on a kvm host.  The drivers are intended for guest kernels
>>  2.6.18-2.6.24.  Newer kernels include the drivers; older kernels may not
>>  work.  kvm-61 or later is needed in the host.
>> installed.
>>     
>
>   
thanks alot for this!

> Just 1 question: Above is the instruction for guest. How about the
> host? Dont we need to install anything??
>
> I suppose that qemu in the latest kvm package already supported
> virtio, but I think we need some support from host kernel as well?
>   
no, virtio drivers are only needed on guest - but you need latest kvm 
modules on host.

Thomas

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Re: [ANNOUNCE] kvm-guest-drivers-linux-1

[Balaji Rao]

On Thursday 06 March 2008 04:01:53 pm Jun Koi wrote:
> On 3/6/08, Avi Kivity <avi@qumranet.com> wrote:
> > This is the first release of block and network drivers for Linux guests
> >  running on a kvm host.  The drivers are intended for guest kernels
> >  2.6.18-2.6.24.  Newer kernels include the drivers; older kernels may not
> >  work.  kvm-61 or later is needed in the host.
> >
> >  Network throughput is around 1 Gbit/sec; latency is currently a less
> >  than stellar 0.3 msec.  Both these figures will be improved in the
> > future.
> >
> >  The drivers are available from the download page of the kvm website,
> > below.
> >
> >  To use, download the drivers into the guest (using one of the emulated
> >  network cards), unpack the package, and type
> >
> >   make
> >   sudo make install
> >
> >  You will need the kernel development package installed.
>
> Excellent, thanks!
>
> Just 1 question: Above is the instruction for guest. How about the
> host? Dont we need to install anything??
>
> I suppose that qemu in the latest kvm package already supported
> virtio, but I think we need some support from host kernel as well?
Hi Jun,

No, AFAIK we don't need any support from the host kernel. We just need a 
virtio backend to be present in qemu, which is there in the latest 
kvm-userspace.

-- 
regards,
balaji rao

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Re: [ANNOUNCE] kvm-guest-drivers-linux-1

[Anthony Liguori]

Balaji Rao wrote:
>> Excellent, thanks!
>>
>> Just 1 question: Above is the instruction for guest. How about the
>> host? Dont we need to install anything??
>>
>> I suppose that qemu in the latest kvm package already supported
>> virtio, but I think we need some support from host kernel as well?
>>     
> Hi Jun,
>
> No, AFAIK we don't need any support from the host kernel. We just need a 
> virtio backend to be present in qemu, which is there in the latest 
> kvm-userspace.
>   

Correct.  In the future, we may have kernel backends but you should 
still be able to use the userspace backends.

Regards,

Anthony Liguori



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Re: [ANNOUNCE] kvm-guest-drivers-linux-1

[Iain Paton]

Avi Kivity wrote:
 > > This is the first release of block and network drivers for Linux guests
 > > running on a kvm host.  The drivers are intended for guest kernels
 > > 2.6.18-2.6.24.  Newer kernels include the drivers; older kernels may not
 > > work.  kvm-61 or later is needed in the host.

Trying to build against 2.6.24 gives the following:

    CC [M]  /root/kvm/kvm-guest-drivers-linux-1/virtio_net.o
/root/kvm/kvm-guest-drivers-linux-1/virtio_net.c: In function 'receive_skb':
/root/kvm/kvm-guest-drivers-linux-1/virtio_net.c:101: error: implicit declaration of function 'skb_partial_csum_set'
make[2]: *** [/root/kvm/kvm-guest-drivers-linux-1/virtio_net.o] Error 1
make[1]: *** [_module_/root/kvm/kvm-guest-drivers-linux-1] Error 2

it seems that function isn't available in 2.6.18-2.6.24 or in the driver
download.

Looks like the missing function doesn't show up until 2.6.25-rc1 which
appears to have all of the virtio drivers anyway ?

Iain


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Re: [ANNOUNCE] kvm-guest-drivers-linux-1

[Paul Collins]

Iain Paton <ilp@lkml.darkvoyage.org.uk> writes:

> Trying to build against 2.6.24 gives the following:
>
>     CC [M]  /root/kvm/kvm-guest-drivers-linux-1/virtio_net.o
> /root/kvm/kvm-guest-drivers-linux-1/virtio_net.c: In function 'receive_skb':
> /root/kvm/kvm-guest-drivers-linux-1/virtio_net.c:101: error: implicit declaration of function 'skb_partial_csum_set'
> make[2]: *** [/root/kvm/kvm-guest-drivers-linux-1/virtio_net.o] Error 1
> make[1]: *** [_module_/root/kvm/kvm-guest-drivers-linux-1] Error 2

This change fixes the build here.

--- external-module-compat.h~	2008-03-06 21:08:36.000000000 +1300
+++ external-module-compat.h	2008-03-07 15:49:57.000000000 +1300
@@ -13,6 +13,8 @@
 #define COMPAT_cb_softirq
 #endif
 
+#define COMPAT_csum_offset
+
 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24)
 
 struct virtio_device_id {
@@ -63,8 +65,6 @@
 } while(0)
 #define netif_rx_schedule(dev, napi) netif_rx_schedule(dev)
 
-#define COMPAT_csum_offset
-
 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,23)
 
 #define scsi_cmd_ioctl(filp, rq, gendisk, cmd, data) \


-- 
Paul Collins
Wellington, New Zealand

Dag vijandelijk luchtschip de huismeester is dood

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Re: [ANNOUNCE] kvm-guest-drivers-linux-1

[Avi Kivity]

Paul Collins wrote:
> Iain Paton <ilp@lkml.darkvoyage.org.uk> writes:
>
>   
>> Trying to build against 2.6.24 gives the following:
>>
>>     CC [M]  /root/kvm/kvm-guest-drivers-linux-1/virtio_net.o
>> /root/kvm/kvm-guest-drivers-linux-1/virtio_net.c: In function 'receive_skb':
>> /root/kvm/kvm-guest-drivers-linux-1/virtio_net.c:101: error: implicit declaration of function 'skb_partial_csum_set'
>> make[2]: *** [/root/kvm/kvm-guest-drivers-linux-1/virtio_net.o] Error 1
>> make[1]: *** [_module_/root/kvm/kvm-guest-drivers-linux-1] Error 2
>>     
>
> This change fixes the build here.
>   

Applied, thanks.

-- 
error compiling committee.c: too many arguments to function


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