3.10 ARM kernel configs

[Josh Boyer]

On Thu, May 02, 2013 at 06:49:00PM +0100, Peter Robinson wrote:
> On Thu, May 2, 2013 at 6:43 PM, Josh Boyer <jwboyer at redhat.com> wrote:
> > So.  When trying to do the latest merge, this is what I get on a prep
> > for the -tegra config:
> >
> > + mv kernel-3.10.0-armv7hl-tegra.config .config
> > ++ head -1 .config
> > ++ cut -b 3-
> > + Arch=arm
> > + make ARCH=arm listnewconfig
> > + grep -E '^CONFIG_'
> > warning: (VIRTIO_PCI && VIRTIO_MMIO && REMOTEPROC && RPMSG) selects
> > VIRTIO which has unmet direct dependencies (VIRTUALIZATION)
> > + '[' -s .newoptions ']'
> > + cat .newoptions
> > CONFIG_ARCH_MULTI_V6
> > CONFIG_ARCH_MULTI_V7
> > CONFIG_ARCH_MVEBU
> > CONFIG_ARCH_BCM
> > CONFIG_ARCH_HIGHBANK
> > CONFIG_ARCH_MXC
> > CONFIG_ARCH_OMAP2PLUS
> > CONFIG_ARCH_SOCFPGA
> > CONFIG_PLAT_SPEAR
> > CONFIG_ARCH_SUNXI
> > CONFIG_ARCH_SIRF
> > CONFIG_ARCH_U8500
> > CONFIG_ARCH_VEXPRESS_CORTEX_A5_A9_ERRATA
> > CONFIG_ARCH_VEXPRESS_CA9X4
> > CONFIG_ARCH_VIRT
> > CONFIG_ARCH_WM8850
> > CONFIG_ARCH_ZYNQ
> > + exit 1
> > error: Bad exit status from /var/tmp/rpm-tmp.JpdsWj (%prep)
> >
> >
> > Now, looking at the various ARM config files, almost all of those are
> > set in config-armv7.  None of them are set in config-armv7-generic or
> > config-armv7-tegra.  The questions I have are:
> >
> > 1) What is config-armv7 and why is it different from
> > config-armv7-generic?
> 
> It's non pae vs pae. I did it the same as x86.

Er... similar I guess.  Not the same.  x86 has "PAE" in the PAE config
:).  You do have a config-armv7-lpae, but that is inheriting from
config-armv7-generic.

> > 2) Why does tegra (and the other boards) not inherit config-armv7 at all
> > and only inherits from temp-armv7-generic (config-armv7-generic +
> > config-generic)?
> 
> Because generic is inherited by the other 3.

What other 3?  There's only 3 kernels total right now: armv7hl
(config-armv7), armv7hl-lpae (config-armv7-generic), and tegra
(config-armv7-generic but not any of the lpae configs).
> 
> > As it stands right now, either config-armv7-generic needs to inherit all
> > the settings from config-armv7 or they need to be explicitly set in
> > config-armv7-tegra.  Explicitly setting them is feasible, but that's a
> > lot of duplication.  I've no clue what the setup here is, nor which
> > option is correct.
> 
> Tegra will disappear with 3.10 (at least that's the plans) and the
> other two are different because they need to be. armv7-generic is the
> shared bits between the two.

Oh.  Good.

> > Can you please tell me which to do so I can continue with this merge?
> > I'd like to get -git12 fixed up and pushed out today.
> 
> If you can push the changes you have I can fix the issues now.

I would feel extremely bad if I pushed something to git that didn't even
pass 'make prep'.  As a compromise, I added this line in kernel.spec:

@@ -1451,6 +1451,8 @@ mkdir configs
 rm -f kernel-%{version}-*debug.config
 %endif
 
+rm -f kernel-%{version}-arm*.config
+
 # now run oldconfig over all the config files

So the ARM configs won't be included in the prep run.  That lets things
progress on all the other arches for now.  Just remove that line, fix
things up, and push out.

I'll hold off on doing the build for a bit.  Thanks for the quick reply.

josh