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

[Dan Magenheimer <dan.magenheimer@xxxxxxxxxx>]

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
> 
>

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