linux-toradex.git/arch/s390/kernel/setup.c, branch v3.9.2

s390/mm: fix vmemmap size calculation

2013-03-05T09:21:35+00:00

The size of the vmemmap must be a multiple of PAGES_PER_SECTION, since the
common code always initializes the vmemmap in such pieces.
So we must round up in order to not have a too small vmemmap.

Fixes an IPL crash on 31 bit with more than 1920MB.

Signed-off-by: Heiko Carstens 
Signed-off-by: Martin Schwidefsky

s390/pm: export pm_power_off

2013-01-08T09:57:09+00:00

Export pm_power_off symbol. Needed by at least one of the new device
drivers that come with CONFIG_PCI.
And all other architectures export that symbol as well.

Signed-off-by: Heiko Carstens 
Signed-off-by: Martin Schwidefsky

s390: add zEC12 code generation support

2012-11-23T10:14:31+00:00

Allow to generate code that only runs on zEC12 machines.

Also add a check which prevents the kernel to run on machines which
do not have any of the following new facilities installed:

- (48) decimal-floating-point zoned-conversion
- (49) execution-hint
- (49) load-and-trap
- (49) miscellaneous-instruction-extensions
- (49) processor-assist
- (50) constrained transactional-execution
- (73) transactional-execution

48, 49, 50 and 73 are the bit numbers of the facility indications for
each of the required facilities.

Note that we assume that user-space gets compiled with the same
compiler options, therefore we also test for a dfp facility even
if the kernel doesn't make use of it.

Signed-off-by: Heiko Carstens

s390/memory hotplug: use pfmf instruction to initialize storage keys

2012-11-23T10:14:30+00:00

Move and rename init_storage_keys() to pageattr.c, so it can also be
used from the sclp memory hotplug code in order to initialize
storage keys.

Signed-off-by: Heiko Carstens 
Signed-off-by: Martin Schwidefsky

s390/vmalloc: have separate modules area

2012-10-09T12:17:01+00:00

Add a special module area on top of the vmalloc area, which may be only
used for modules and bpf jit generated code.
This makes sure that inter module branches will always happen without a
trampoline and in addition having all the code within a 2GB frame is
branch prediction unit friendly.

Signed-off-by: Heiko Carstens 
Signed-off-by: Martin Schwidefsky

s390/mm: use pfmf instruction to initialize storage keys

2012-10-09T12:16:55+00:00

Make use of the pfmf instruction, if available, to initialize storage keys
of whole 1MB or 2GB frames instead of initializing every single page with
the sske instruction.

Signed-off-by: Heiko Carstens 
Signed-off-by: Martin Schwidefsky

s390/kexec: remove CONFIG_KEXEC

2012-09-26T13:45:24+00:00

Since "Kconfig: split the s390 base menu" CONFIG_KEXEC gets always selected.
Therefore there is no point in keeping CONFIG_KEXEC anywhere.

Signed-off-by: Heiko Carstens 
Signed-off-by: Martin Schwidefsky

s390/mm: shorten addressing mode initialization

2012-09-26T13:45:06+00:00

Shorten the code for addressing mode initialization. Also add missing
__init annotations, since this code is only used during kernel initialization.

Signed-off-by: Heiko Carstens 
Signed-off-by: Martin Schwidefsky

s390/mm: rename addressing_mode to s390_user_mode

2012-09-26T13:45:05+00:00

Renaming the globally visible variable "user_mode" to "addressing_mode" in
order to fix a name clash was not a good idea. (Commit 37fe1d73 "s390/mm:
rename user_mode variable to addressing_mode")
Looking at the code after a couple of weeks one thinks: addressing mode of
what?
So rename the variable again. This time to s390_user_mode. Which hopefully
makes more sense.

Signed-off-by: Heiko Carstens 
Signed-off-by: Martin Schwidefsky

s390/mm: change default addressing mode

2012-09-26T13:45:04+00:00

Change the default addressing mode so that user space runs in primary space
and the kernel runs in home space.
In addition remove the "switch_amode" kernel parameter so all users who
already specified they want the new default behaviour will stay in the
"switched" mode instead of in the opposite they intended.
If there is a need to switch addressing modes, this can be done with the
"user_mode" kernel parameter: user_mode=home

Signed-off-by: Heiko Carstens 
Signed-off-by: Martin Schwidefsky