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  1. 03 Feb, 2013 6 commits
  3. 19 Dec, 2012 1 commit
  5. 05 Dec, 2012 1 commit
  7. 30 Nov, 2012 1 commit
  9. 29 Nov, 2012 1 commit
  11. 23 Nov, 2012 1 commit
    • Heiko Carstens's avatar
      s390: add zEC12 code generation support · 991c1505
      Heiko Carstens authored 
      
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: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
      991c1505
  13. 13 Nov, 2012 1 commit
    • Heiko Carstens's avatar
      s390/mm: have 16 byte aligned struct pages · 4bffbb34
      Heiko Carstens authored 
      
Select HAVE_ALIGNED_STRUCT_PAGE on s390, so that the slub allocator can make
use of compare and swap double for lockless updates. This increases the size
of struct page to 64 bytes (instead of 56 bytes), however the performance gain
justifies the increased size:

- now excactly four struct pages fit into a single cache line; the
  case that accessing a struct page causes two cache line loads
  does not exist anymore.
- calculating the offset of a struct page within the memmap array
  is only a simple shift instead of a more expensive multiplication.

A "hackbench 200 process 200" run on a 32 cpu system did show an 8% runtime
improvement.
Signed-off-by: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
      4bffbb34
  15. 29 Oct, 2012 1 commit
  17. 18 Oct, 2012 1 commit
  19. 09 Oct, 2012 3 commits
  21. 01 Oct, 2012 1 commit
  23. 28 Sep, 2012 2 commits
    • Rusty Russell's avatar
      virtio: remove CONFIG_VIRTIO_RING · eccbb05a
      Rusty Russell authored 
      
Everyone who selects VIRTIO is also made to select VIRTIO_RING; just make
them synonymous, since we removed the indirection layer some time ago.
Signed-off-by: default avatarRusty Russell <rusty@rustcorp.com.au>
      eccbb05a
    • David Howells's avatar
      Make most arch asm/module.h files use asm-generic/module.h · 786d35d4
      David Howells authored 
      
Use the mapping of Elf_[SPE]hdr, Elf_Addr, Elf_Sym, Elf_Dyn, Elf_Rel/Rela,
ELF_R_TYPE() and ELF_R_SYM() to either the 32-bit version or the 64-bit version
into asm-generic/module.h for all arches bar MIPS.

Also, use the generic definition mod_arch_specific where possible.

To this end, I've defined three new config bools:

 (*) HAVE_MOD_ARCH_SPECIFIC

     Arches define this if they don't want to use the empty generic
     mod_arch_specific struct.

 (*) MODULES_USE_ELF_RELA

     Arches define this if their modules can contain RELA records.  This causes
     the Elf_Rela mapping to be emitted and allows apply_relocate_add() to be
     defined by the arch rather than have the core emit an error message.

 (*) MODULES_USE_ELF_REL

     Arches define this if their modules can contain REL records.  This causes
     the Elf_Rel mapping to be emitted and allows apply_relocate() to be
     defined by the arch rather than have the core emit an error message.

Note that it is possible to allow both REL and RELA records: m68k and mips are
two arches that do this.

With this, some arch asm/module.h files can be deleted entirely and replaced
with a generic-y marker in the arch Kbuild file.

Additionally, I have removed the bits from m32r and score that handle the
unsupported type of relocation record as that's now handled centrally.
Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
Acked-by: default avatarSam Ravnborg <sam@ravnborg.org>
Signed-off-by: default avatarRusty Russell <rusty@rustcorp.com.au>
      786d35d4
  25. 26 Sep, 2012 7 commits
  27. 24 Sep, 2012 1 commit
    • John Stultz's avatar
      time: Convert CONFIG_GENERIC_TIME_VSYSCALL to CONFIG_GENERIC_TIME_VSYSCALL_OLD · 70639421
      John Stultz authored 
      
To help migrate archtectures over to the new update_vsyscall method,
redfine CONFIG_GENERIC_TIME_VSYSCALL as CONFIG_GENERIC_TIME_VSYSCALL_OLD

Cc: Tony Luck <tony.luck@intel.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Paul Turner <pjt@google.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Richard Cochran <richardcochran@gmail.com>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: default avatarJohn Stultz <john.stultz@linaro.org>
      70639421
  29. 17 Aug, 2012 1 commit
    • Frederic Weisbecker's avatar
      cputime: Generalize CONFIG_VIRT_CPU_ACCOUNTING · b952741c
      Frederic Weisbecker authored 
      
S390, ia64 and powerpc all define their own version
of CONFIG_VIRT_CPU_ACCOUNTING. Generalize the config
and its description to a single place to avoid
duplication.
Signed-off-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
      b952741c
  31. 08 Aug, 2012 1 commit
  33. 31 Jul, 2012 2 commits
  35. 26 Jul, 2012 1 commit
  37. 30 May, 2012 1 commit
  39. 21 May, 2012 2 commits
  41. 16 May, 2012 4 commits