RE: [Xen-devel] upstream xen-ified kernel building challenge

[Dan Magenheimer <dan.magenheimer@xxxxxxxxxx>]

*Sigh*  Though this kernel is runnable on Xen, it
crashes early with a bad system call.  So the
default (2.6.30 32-bit) kernel build, with Xen configs
added, doesn't boot.

(I have a config that works, its just frustrating
as I'd really like to find the magic key! And the
diffs between the working version and the "min"
version (below) are too extensive!)

> -----Original Message-----
> From: Dan Magenheimer 
> Sent: Wednesday, June 24, 2009 10:50 AM
> To: Marc - A. Dahlhaus [ Administration | Westermann GmbH ]
> Cc: Xen-devel
> Subject: RE: [Xen-devel] upstream xen-ified kernel building challenge
> 
> 
> Thanks Marc!  It looks like the magic key I was missing is
> CONFIG_HIGHMEM64G.  The following works for a 32-bit 2.6.30
> kernel.  It misses the frame buffer drivers and paravirtualized
> spinlocks but results in a kernel runnable on Xen.
> 
> cat > .config << "EOF"
> CONFIG_PARAVIRT_GUEST=y
> CONFIG_XEN=y
> CONFIG_HIGHMEM64G=y
> EOF
> yes '' | make oldconfig
> 
> > -----Original Message-----
> > From: Marc - A. Dahlhaus [ Administration | Westermann GmbH ]
> > [mailto:mad@xxxxxx]
> > Sent: Wednesday, June 24, 2009 4:04 AM
> > To: Dan Magenheimer
> > Cc: Xen-devel
> > Subject: Re: [Xen-devel] upstream xen-ified kernel building 
> challenge
> > 
> > 
> > Hello Dan,
> > 
> > it could look like this:
> > 
> > cat > .config << "EOF"
> > CONFIG_PARAVIRT_GUEST=y
> > CONFIG_XEN=y
> > CONFIG_PARAVIRT=y
> > CONFIG_PARAVIRT_SPINLOCKS=y
> > CONFIG_PARAVIRT_CLOCK=y
> > CONFIG_X86_CMPXCHG64=y
> > CONFIG_HIGHMEM64G=y
> > CONFIG_X86_PAE=y
> > CONFIG_ARCH_PHYS_ADDR_T_64BIT=y
> > CONFIG_PHYS_ADDR_T_64BIT=y
> > CONFIG_XEN_NETDEV_FRONTEND=y
> > CONFIG_XEN_KBDDEV_FRONTEND=y
> > CONFIG_FB_SYS_FILLRECT=y
> > CONFIG_FB_SYS_COPYAREA=y
> > CONFIG_FB_SYS_IMAGEBLIT=y
> > CONFIG_FB_SYS_FOPS=y
> > CONFIG_FB_DEFERRED_IO=y
> > CONFIG_XEN_FBDEV_FRONTEND=y
> > EOF
> > yes '' | make oldconfig
> > 
> > (the options could be shortened with a for loop but it would make it
> > unreadable...)
> > 
> > I think the oldconfig run will get and set your arch and 
> shift options
> > if needed for x86_64 but i haven't testet that but it should work on
> > 32bit PAE systems...
> > 
> > have fun,
> > 
> > Marc
> > 
> > Am Dienstag, den 23.06.2009, 16:06 -0700 schrieb Dan Magenheimer:
> > > A fun challenge for those of you who eat raw upstream kernels
> > > for lunch:
> > > 
> > > 1) Untar an upstream (say 2.6.30) kernel.org kernel
> > > 2) From the bash command line ONLY, execute one or more
> > >    commands to configure the kernel so "make" will build
> > >    a fully xen-ified kernel.  (Everything else can
> > >    use the defconfig default.)
> > > 
> > > For extra credit:
> > > 3) Determine the shortest sequence of commands to do
> > >    the above.
> > > 
> > > After many tries, I have not been able to do (2) at all.
> > > I always have to fall back to an existing .config file
> > > that was created using menuconfig.  (I *suspect* this is
> > > because PARAVIRT_GUEST is defined in Kconfig using a
> > > menuconfig line rather than a config line, but am unsure.)
> > > 
> > > Dan
> > > 
> > > _______________________________________________
> > > Xen-devel mailing list
> > > Xen-devel@xxxxxxxxxxxxxxxxxxx
> > > http://lists.xensource.com/xen-devel
> > 
> >
> 
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel
>

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