Re: [Xen-users] DMA not enabled in Xen Kernel?

[Mark Porter <mark@xxxxxxxxxxxxxxxx>]

I'm guessing that "Make" is just doing a default kernel make which won't 
be the right ARCH. Try  going ../ to the xen-2.0 directory and type 
'make kernels'. This will make  the domU and dom0 kernels with ARCH=xen 
using your new .config file, and install them to xen-2.0/dist. From the 
dist directory you can run './install.sh' to copy everything to where 
you need it to be. Be sure you have backed up any customizations in 
/etc/xen first as they will be overwritten with the defaults.
I just spent a few hours going through this to get my ide chipset in the 
kernel (as well as usb support, and to make a boatload of modules)

-Mark


Charles Johnson wrote:

> Hi,
>
> Well, I'm trying to compile a custom xen0 kernel now but having some 
> problems.
> I downloaded the xen source then did a "make world" and ran install.sh
>
> Then I went into the linux-2.6.11-xen0 directory and did "make 
> ARCH=xen menuconfig" and setup the kernel the way I needed it and then 
> did a "make".
> It chugs along like normal for awhile until it pukes on this:
>
> drivers/xen/balloon/balloon.c: In function `balloon_process':
> drivers/xen/balloon/balloon.c:218: error: `phys_to_machine_mapping' 
> undeclared (first use in this function)
> drivers/xen/balloon/balloon.c:218: error: (Each undeclared identifier 
> is reported only once
> drivers/xen/balloon/balloon.c:218: error: for each function it appears 
> in.)
> drivers/xen/balloon/balloon.c:218: error: `INVALID_P2M_ENTRY' 
> undeclared (first use in this function)
> drivers/xen/balloon/balloon.c:261: warning: implicit declaration of 
> function `scrub_pages'
> drivers/xen/balloon/balloon.c:283: warning: implicit declaration of 
> function `mfn_to_pfn'
> make[3]: *** [drivers/xen/balloon/balloon.o] Error 1
> make[2]: *** [drivers/xen/balloon] Error 2
> make[1]: *** [drivers/xen] Error 2
> make: *** [drivers] Error 2
>
> Any ideas on how to get around this?
>
> Thanks.
>
> > From: "M.A. Williamson" <maw48@xxxxxxxxx>
> > Reply-To: mark.williamson@xxxxxxxxxxxx
> > To: Charles Johnson <johnsoncharles@xxxxxxxxxxx>
> > CC: xen-users@xxxxxxxxxxxxxxxxxxx
> > Subject: Re: [Xen-users] DMA not enabled in Xen Kernel?
> > Date: 06 Jun 2005 17:45:22 +0100
> >
> > Chances are that the default XenLinux config doesn't support DMA for 
> > your IDE chipset. It'll work but you'll need to get the source 
> > release and compile a kernel (instructions in the manual) with 
> > support for your chipset.
> > Cheers,
> > Mark
> >
> > On Jun 6 2005, Charles Johnson wrote:
> >
> > > I installed Xen using the binary release on debian sarge and got it 
> > > to boot no problem but when I check if dma is enabled with 'hdparm 
> > > /dev/hda' it's not.
> > > I can't enable it either with 'hdparm -d1 /dev/hda'. Says operation 
> > > not permited. Using my debian default kernel dma works just fine.
> > > How can I enable dma with the Xen Kernel?
> > >
> > > Thanks!
>
>
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