Re: [Xen-devel] domU guest for xcp 0.1.1

[Ritu kaur <ritu.kaur.us@xxxxxxxxx>]

Thanks Ian and Pasi, it took me much less time than I had thought to fix drivers and I am able to see nic interfaces via ifconfig. I am yet to test ping and other stuff. Had couple of questions

1. I used xe vm-param-clear uuid=<uuid-of-vm> param-name=other-config on dom0 and rebooted domU assuming dom0 will get back pci device. It didn't. I had to reboot dom0 in order to unhook pci device from domU. Is this the way it is supposed to work? 

2. Unrelated to pci passthrough, xen/stable code I downloaded doesn't seem to have netfront drivers or any front drivers, doesn't it come by default when you download from xen/stable?

Thanks

On Mon, Mar 15, 2010 at 6:46 AM, Ritu kaur <ritu.kaur.us@gmail.com> wrote:

Thanks Ian, I will take a look at it.

On Mon, Mar 15, 2010 at 6:44 AM, Ian Campbell <Ian.Campbell@xxxxxxxxxx> wrote:

On Mon, 2010-03-15 at 13:42 +0000, Ritu kaur wrote:
> Hi Ian,
>
> Thanks. Should I use DDK to compile my drivers? I have pci device
> listed in domU and drivers are not compilable there hence wondering
> how do I use the it?

You must compile your driver against the kernel used in the domU. This
is not a Xen specific requirement -- you must always compile your driver
against the kernel you want to use it with. Note that this may involve
porting your driver to work with the kernel you are using in your domU.

Ian.

>
> Thanks
>
> On Mon, Mar 15, 2010 at 1:44 AM, Ian Campbell
> <Ian.Campbell@xxxxxxxxxx> wrote:
>         On Mon, 2010-03-15 at 03:30 +0000, Ritu kaur wrote:
>         > Just to add, this driver compiles fine in other linux
>         flavors(Debian
>         > Lenny 5.0, Citrix Xenserver...) so it has to do with
>         Xen/stable.
>         > Didn't see anything related to this in xen-devel, inputs
>         appreciated.
>
>
>         This is because the pvops kernel is based on a much newer
>         upstream
>         kernel (2.6.31 or 32) than that found in Lenny (2.6.26) or
>         Citrix
>         XenServer (2.6.18/27) and some of the kernel's internal
>         interfaces must
>         have changed.
>
>         This has nothing to do with Xen per-se but rather
>         compatibility with
>         different Linux kernels.
>
>         Ian.
>
>
>         >
>         > Thanks
>         >
>         > On Sun, Mar 14, 2010 at 6:40 PM, Ritu kaur
>         <ritu.kaur.us@gmail.com>
>         > wrote:
>         >         Hi Pasi,
>         >
>         >         I am able to use xen/stable kernel in domU(debian
>         lenny) and
>         >         lspci lists the device(i am testing pci
>         passthrough). however,
>         >         when I compile my driver in domU I get
>         >
>         >         struct net_device has no member named open
>         >         struct net_device has no member named stop
>         >         struct net_device has no member named
>         hard_start_xmit
>         >         ...
>         >
>         >         I need to compile my driver in domU and load it in
>         order to
>         >         use the nic from domU. Inputs appreciated.
>         >
>         >         Thanks
>         >
>         >
>         >
>         >         On Sun, Mar 14, 2010 at 1:52 PM, Sander Eikelenboom
>         >         <linux@xxxxxxxxxxxxxx> wrote:
>         >                 Hello Ritu,
>         >
>         >                 I don't have experience with XCP
>         specifically, but
>         >                 normal compiled pvops-kernels work fine for
>         me with
>         >                 Debian lenny domU's.
>         >
>         >                 --
>         >                 Sander
>         >
>         >
>         >                 Sunday, March 14, 2010, 9:29:29 PM, you
>         wrote:
>         >
>         >                 > Hi Sander,
>         >
>         >                 > Thanks, I enabled DOM0 and other backend
>         drivers
>         >                 along with pci frontend in
>         >                 > .config file. I am able to get it build.
>         However, I
>         >                 having additional
>         >                 > questions, inputs appreciated.
>         >
>         >                 > 1. can this kernel be used in any linux
>         >                 distribution? I have Debian Lenny as
>         >                 > DomU?
>         >
>         >                 > 2. In Debian Lenny /boot/grub/menu.lst, I
>         have
>         >                 > title           Debian GNU/Linux, kernel
>         >                 2.6.26-2-686-bigmem
>         >                 > root            (hd0,0)
>         >                 > kernel
>          /boot/vmlinuz-2.6.26-2-686-bigmem
>         >                 root=/dev/xvda1 ro
>         >                 > console=hvc0 quiet
>         >                 > initrd
>          /boot/initrd.img-2.6.26-2-686-bigmem
>         >
>         >                 > but the kernel image built in
>         arch/i386/boot is
>         >                 bzImage. Does "make
>         >                 > modules_install" and "make install" take
>         care of it,
>         >                 since I am not sure I
>         >                 > haven't tried it.
>         >
>         >                 > Basically, my question boils down to
>         >
>         >                 > 1. Can I use bzImage in debian lenny,
>         >                 > 2. does make install take care of
>         configuring it
>         >
>         >
>         >                 > Thanks
>         >
>         >                 > On Sun, Mar 14, 2010 at 4:15 AM, Sander
>         Eikelenboom
>         >                 <linux@xxxxxxxxxxxxxx>wrote:
>         >
>         >                 >> Hello Ritu,
>         >                 >>
>         >                 >> There are some problems with pci.h, i
>         have also
>         >                 reported this to Konrad.
>         >                 >> As a workaround you can enable dom0
>         support in
>         >                 these kernels, then they
>         >                 >> compile fine in my case.
>         >                 >>
>         >                 >> --
>         >                 >>
>         >                 >> Sander
>         >                 >>
>         >                 >>
>         >                 >> Sunday, March 14, 2010, 2:43:23 AM, you
>         wrote:
>         >                 >>
>         >                 >> > I followed the steps mentioned in  wiki
>         to pull
>         >                 xen code to compile domU
>         >                 >> > kernel from
>         >                 >>
>         >                 >> > 1. xen/master, I get following
>         compilation
>         >                 errors. I do see in xen-devel
>         >                 >> > forum someone else has reported similar
>         issue but
>         >                 no solution yet(patch
>         >                 >> > provided by Konrad has followup errors)
>         >                 >>
>         >                 >> > CC [M]  drivers/watchdog/machzwd.o
>         >                 >> >   CC [M]  drivers/watchdog/sbc_epx_c3.o
>         >                 >> >   CC [M]  drivers/watchdog/softdog.o
>         >                 >> >   CC      drivers/xen/grant-table.o
>         >                 >> >   CC      drivers/xen/features.o
>         >                 >> >   CC      drivers/xen/events.o
>         >                 >> > drivers/xen/events.c:605: error:
>         redefinition of
>         >                 ‘xen_destroy_irq’
>         >                 >>
>         >
>         > /root/kernel/linux.2-6.xen/arch/x86/include/asm/xen/pci.h:29: error:
>         >                 >> > previous definition of â
>         €˜xen_destroy_irq’ was
>         >                 here
>         >                 >> > drivers/xen/events.c:637: error:
>         redefinition of
>         >                 ‘xen_create_msi_irq’
>         >                 >>
>         >
>         > /root/kernel/linux.2-6.xen/arch/x86/include/asm/xen/pci.h:25: error:
>         >                 >> > previous definition of â
>         €˜xen_create_msi_irq’
>         >                 was here
>         >                 >> > make[2]: *** [drivers/xen/events.o]
>         Error 1
>         >                 >> > make[1]: *** [drivers/xen] Error 2
>         >                 >> > make: *** [drivers] Error 2
>         >                 >>
>         >                 >> > 2. xen/stable, I get following errors
>         >                 >>
>         >                 >> >  CC      drivers/pci/xen-pcifront.o
>         >                 >> > drivers/pci/xen-pcifront.c:373: error:
>         variable â
>         >                 €˜pci_frontend_ops’
>         >                 >> has
>         >                 >> > initializut incomplete type
>         >                 >> > drivers/pci/xen-pcifront.c:374: error:
>         unknown
>         >                 field ‘enable_msi’
>         >                 >> > specified in ializer
>         >                 >> > drivers/pci/xen-pcifront.c:374:
>         warning: excess
>         >                 elements in struct
>         >                 >> > initializer
>         >                 >> > drivers/pci/xen-pcifront.c:374:
>         warning: (near
>         >                 initialization for
>         >                 >> > ‘pci_frontend_op)’
>         >                 >> > drivers/pci/xen-pcifront.c:375: error:
>         unknown
>         >                 field ‘disable_msi’
>         >                 >> > specified in ializer
>         >                 >> > drivers/pci/xen-pcifront.c:375:
>         warning: excess
>         >                 elements in struct
>         >                 >> > initializer
>         >                 >> > drivers/pci/xen-pcifront.c:375:
>         warning: (near
>         >                 initialization for
>         >                 >> > ‘pci_frontend_op)’
>         >                 >> > drivers/pci/xen-pcifront.c:376: error:
>         unknown
>         >                 field ‘enable_msix’
>         >                 >> > specified in ializer
>         >                 >> > drivers/pci/xen-pcifront.c:376:
>         warning: excess
>         >                 elements in struct
>         >                 >> > initializer
>         >                 >> > drivers/pci/xen-pcifront.c:376:
>         warning: (near
>         >                 initialization for
>         >                 >> > ‘pci_frontend_op)’
>         >                 >> > drivers/pci/xen-pcifront.c:377: error:
>         unknown
>         >                 field ‘disable_msix’
>         >                 >> > specified intializer
>         >                 >> > drivers/pci/xen-pcifront.c:377:
>         warning: excess
>         >                 elements in struct
>         >                 >> > initializer
>         >                 >> > drivers/pci/xen-pcifront.c:377:
>         warning: (near
>         >                 initialization for
>         >                 >> > ‘pci_frontend_op)’
>         >                 >> > drivers/pci/xen-pcifront.c: In function
>         â
>         >                 €˜pci_frontend_registrar’:
>         >                 >> > drivers/pci/xen-pcifront.c:383: error:
>         â
>         >                 €˜xen_pci_frontend’ undeclared
>         >                 >> > (first use his function)
>         >                 >> > drivers/pci/xen-pcifront.c:383: error:
>         (Each
>         >                 undeclared identifier is
>         >                 >> > reported only once
>         >                 >> > drivers/pci/xen-pcifront.c:383: error:
>         for each
>         >                 function it appears in.)
>         >                 >> > make[2]: ***
>         [drivers/pci/xen-pcifront.o] Error 1
>         >                 >> > make[1]: *** [drivers/pci] Error 2
>         >                 >> > make: *** [drivers] Error 2
>         >                 >>
>         >                 >> > Kindly let me know how to proceed on
>         this.
>         >                 >>
>         >                 >> > Thanks
>         >                 >>
>         >                 >>
>         >                 >>
>         >                 >> --
>         >                 >> Best regards,
>         >                 >>  Sander
>         >                  mailto:linux@xxxxxxxxxxxxxx
>         >                 >>
>         >                 >>
>         >
>         >
>         >
>         >
>         >                 --
>         >
>         >                 Best regards,
>         >                  Sander
>         >                  mailto:linux@xxxxxxxxxxxxxx
>         >
>         >
>         >
>         >
>         >
>
>
>
>

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