linux-stable.git/arch/s390/kernel/setup.c, branch linux-3.13.y

s390/smp: improve setup of possible cpu mask

2013-12-18T16:35:18+00:00

Since under z/VM we cannot have more than 64 cpus, make sure the
cpu_possible_mask does not contain more bits.
This avoids wasting memory for dynamic per-cpu allocations if
CONFIG_NR_CPUS is larger than 64.

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

s390/sclp: Determine HSA size dynamically for zfcpdump

2013-11-15T13:08:40+00:00

Currently we have hardcoded the HSA size to 32 MiB. With this patch the
HSA size is determined dynamically via SCLP in early.c.

Reviewed-by: Heiko Carstens 
Signed-off-by: Michael Holzheu 
Signed-off-by: Martin Schwidefsky

s390/uaccess: always run the kernel in home space

2013-10-24T15:16:57+00:00

Simplify the uaccess code by removing the user_mode=home option.
The kernel will now always run in the home space mode.

Signed-off-by: Martin Schwidefsky

s390: add support for IBM zBC12 machine

2013-07-26T11:25:21+00:00

Just add the new model number where appropiate.

Cc: stable@vger.kernel.org # v3.10
Signed-off-by: Heiko Carstens 
Signed-off-by: Martin Schwidefsky

s390: remove setting for saved_max_pfn

2013-07-03T23:08:04+00:00

The only user of saved_max_pfn in s390 is read_oldmem interface but we
have removed that interface, so saved_max_pfn is now unneeded in s390, and
we needn't set it anymore.

Signed-off-by: Zhang Yanfei 
Cc: Martin Schwidefsky 
Cc: Heiko Carstens 
Cc: Michael Holzheu 
Cc: "Eric W. Biederman" 
Cc: "H. Peter Anvin" 
Cc: Benjamin Herrenschmidt 
Cc: Dave Hansen 
Cc: Fenghua Yu 
Cc: Matt Fleming 
Cc: Paul Mackerras 
Cc: Ralf Baechle 
Cc: Tony Luck 
Cc: Vivek Goyal 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

s390/mem_detect: remove artificial kdump memory types

2013-05-03T12:21:15+00:00

Simplify the memory detection code a bit by removing the CHUNK_OLDMEM
and CHUNK_CRASHK memory types.
They are not needed. Everything that is needed is a mechanism to
insert holes into the detected memory.

Reviewed-by: Michael Holzheu 
Signed-off-by: Heiko Carstens 
Signed-off-by: Martin Schwidefsky

s390/mem_detect: limit memory detection loop to "mem=" parameter

2013-05-02T13:50:26+00:00

The current memory detection loop will detect all present memory of
a machine. This is true even if the user specified the "mem=" parameter
on the kernel command line.
This can be a problem since the memory detection may cause a fully
populated host page table for the guest, even for those parts of the
memory that the guest will never use afterwards.

So fix this and only detect memory up to a user supplied "mem=" limit
if specified.

Reported-by: Michael Johanssen 
Reviewed-by: Michael Holzheu 
Signed-off-by: Heiko Carstens 
Signed-off-by: Martin Schwidefsky

s390/kdump,bootmem: fix bootmem allocator bitmap size

2013-05-02T13:50:25+00:00

When in kdump mode the kernel may access only the first couple of
megabytes for execution, the rest contains the dump. However
the size of the bitmap used by the bootmem allocator was calculated
for the whole amount of memory of the machine.

For very large machines this can lead to the situation that the kdump
kernel will not come up because not enough memory is available.

So fix this and calculate the size of the bitmap only for the piece
of memory that the kdump kernel actually uses.

Call reserve_oldmem() before setup_memory_end() so that the memory_chunk
array already has been updated with respect to oldmem chunks.
Afterwards setup_memory_end() will ignore those chunks.

Reviewed-by: Michael Holzheu 
Signed-off-by: Heiko Carstens 
Signed-off-by: Martin Schwidefsky

s390: get rid of odd global real_memory_size

2013-05-02T13:50:25+00:00

The variable real_memory_size has odd semantics and has been used in
a broken way by e.g. the old kvm code.
Therefore get rid of it before anybody else makes use of it.

Reviewed-by: Michael Holzheu 
Signed-off-by: Heiko Carstens 
Signed-off-by: Martin Schwidefsky

s390/zfcpdump: exploit new cio_ignore keywords

2013-05-02T13:50:21+00:00

Use the 'ipldev' and 'condev' cio_ignore keywords to setup the
command line for zfcpdump.

Reviewed-by: Michael Holzheu 
Signed-off-by: Sebastian Ott 
Signed-off-by: Martin Schwidefsky