linux-stable.git/arch/powerpc/kernel/setup_32.c, branch v4.8

powerpc/32: Fix crash during static key init

2016-08-10T09:41:58+00:00

We cannot do those initializations from apply_feature_fixups() as
this function runs in a very restricted environment on 32-bit where
the kernel isn't running at its linked address and the PTRRELOC()
macro must be used for any global accesss.

Instead, split them into a separtate steup_feature_keys() function
which is called in a more suitable spot on ppc32.

Fixes: 309b315b6ec6 ("powerpc: Call jump_label_init() in apply_feature_fixups()")
Reported-and-tested-by: Christian Kujau 
Signed-off-by: Benjamin Herrenschmidt 
Signed-off-by: Michael Ellerman

powerpc: Update obsolete comment in setup_32.c about early_init()

2016-08-10T09:38:02+00:00

We don't identify the machine type anymore...

Signed-off-by: Benjamin Herrenschmidt 
Signed-off-by: Michael Ellerman

powerpc: Move cpu_has_feature() to a separate file

2016-08-01T01:15:03+00:00

We plan to use jump label for cpu_has_feature(). In order to implement
this we need to include the linux/jump_label.h in asm/cputable.h.

Unfortunately if we do that it leads to an include loop. The root of the
problem seems to be that reg.h needs cputable.h (for CPU_FTRs), and then
cputable.h via jump_label.h eventually pulls in hw_irq.h which needs
reg.h (for MSR_EE).

So move cpu_has_feature() to a separate file on its own.

Signed-off-by: Kevin Hao 
Signed-off-by: Aneesh Kumar K.V 
[mpe: Rename to cpu_has_feature.h and flesh out change log]
Signed-off-by: Michael Ellerman

powerpc: Merge 32-bit and 64-bit setup_arch()

2016-07-21T09:17:46+00:00

There is little enough differences now.

mpe: Add a/p/k/setup.h to contain the prototypes and empty versions of
functions we need, rather than using weak functions. Add a few other
empty versions to avoid as many #ifdefs as possible in the code.

Signed-off-by: Benjamin Herrenschmidt 
Signed-off-by: Michael Ellerman

powerpc: Re-order setup_panic()

2016-07-21T09:17:23+00:00

Do it right after probe_machine() since it's about testing ppc_md,
and put the test in the common code.

Signed-off-by: Benjamin Herrenschmidt 
Signed-off-by: Michael Ellerman

powerpc: Re-order the call to smp_setup_cpu_maps()

2016-07-21T09:14:32+00:00

It makes more sense to do it before intializing xmon() as xmon might
use the info in there. We do want to register the console early
though in case we want some functioning printk's in the cpu map setup.

Signed-off-by: Benjamin Herrenschmidt 
Signed-off-by: Michael Ellerman

powerpc/32: Move cache info inits to a separate function

2016-07-21T09:14:32+00:00

Matches 64-bit. Also move the call to the same spot as ppc64

Signed-off-by: Benjamin Herrenschmidt 
Signed-off-by: Michael Ellerman

powerpc: Get rid of ppc_md.init_early()

2016-07-21T09:07:26+00:00

It is now called right after platform probe, so the probe function
can just do the job.

Signed-off-by: Benjamin Herrenschmidt 
Signed-off-by: Michael Ellerman

powerpc: Move 32-bit probe() machine to later in the boot process

2016-07-21T09:06:42+00:00

This converts all the 32-bit platforms to use the expanded device-tree
which is a pretty mechanical change. Unlike 64-bit, the 32-bit kernel
didn't rely on platform initializations to setup the MMU since it
sets it up entirely before probe_machine() so the move has comparatively
less consequences though it's a bigger patch.

Signed-off-by: Benjamin Herrenschmidt 
Signed-off-by: Michael Ellerman

powerpc: Factor do_feature_fixup calls

2016-07-21T08:51:42+00:00

32 and 64-bit do a similar set of calls early on, we move it all to
a single common function to make the boot code more readable.

Signed-off-by: Benjamin Herrenschmidt 
Signed-off-by: Michael Ellerman