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  1. 13 Sep, 2013 1 commit
  2. 11 Sep, 2013 1 commit
  3. 07 Sep, 2013 1 commit
  4. 22 Aug, 2013 1 commit
    • Martin Schwidefsky's avatar
      s390: convert interrupt handling to use generic hardirq · 1f44a225
      Martin Schwidefsky authored
      With the introduction of PCI it became apparent that s390 should
      convert to generic hardirqs as too many drivers do not have the
      correct dependency for GENERIC_HARDIRQS. On the architecture
      level s390 does not have irq lines. It has external interrupts,
      I/O interrupts and adapter interrupts. This patch hard-codes all
      external interrupts as irq #1, all I/O interrupts as irq #2 and
      all adapter interrupts as irq #3. The additional information from
      the lowcore associated with the interrupt is stored in the
      pt_regs of the interrupt frame, where the interrupt handler can
      pick it up. For PCI/MSI interrupts the adapter interrupt handler
      scans the relevant bit fields and calls generic_handle_irq with
      the virtual irq number for the MSI interrupt.
      Reviewed-by: default avatarSebastian Ott <sebott@linux.vnet.ibm.com>
      Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
      1f44a225
  5. 12 Aug, 2013 1 commit
    • Thomas Petazzoni's avatar
      PCI: remove ARCH_SUPPORTS_MSI kconfig option · ebd97be6
      Thomas Petazzoni authored
      Now that we have weak versions for each of the PCI MSI architecture
      functions, we can actually build the MSI support for all platforms,
      regardless of whether they provide or not architecture-specific
      versions of those functions. For this reason, the ARCH_SUPPORTS_MSI
      hidden kconfig boolean becomes useless, and this patch gets rid of it.
      Signed-off-by: default avatarThomas Petazzoni <thomas.petazzoni@free-electrons.com>
      Acked-by: default avatarBjorn Helgaas <bhelgaas@google.com>
      Acked-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      Tested-by: default avatarDaniel Price <daniel.price@gmail.com>
      Tested-by: default avatarThierry Reding <thierry.reding@gmail.com>
      Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: linuxppc-dev@lists.ozlabs.org
      Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
      Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
      Cc: linux390@de.ibm.com
      Cc: linux-s390@vger.kernel.org
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Ingo Molnar <mingo@redhat.com>
      Cc: H. Peter Anvin <hpa@zytor.com>
      Cc: x86@kernel.org
      Cc: Russell King <linux@arm.linux.org.uk>
      Cc: Tony Luck <tony.luck@intel.com>
      Cc: Fenghua Yu <fenghua.yu@intel.com>
      Cc: linux-ia64@vger.kernel.org
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: linux-mips@linux-mips.org
      Cc: David S. Miller <davem@davemloft.net>
      Cc: sparclinux@vger.kernel.org
      Cc: Chris Metcalf <cmetcalf@tilera.com>
      Signed-off-by: default avatarJason Cooper <jason@lakedaemon.net>
      ebd97be6
  6. 26 Jul, 2013 3 commits
  7. 03 Jun, 2013 1 commit
  8. 07 May, 2013 1 commit
  9. 01 May, 2013 1 commit
    • Stephen Boyd's avatar
      Kconfig: consolidate CONFIG_DEBUG_STRICT_USER_COPY_CHECKS · 446f24d1
      Stephen Boyd authored
      The help text for this config is duplicated across the x86, parisc, and
      s390 Kconfig.debug files.  Arnd Bergman noted that the help text was
      slightly misleading and should be fixed to state that enabling this
      option isn't a problem when using pre 4.4 gcc.
      
      To simplify the rewording, consolidate the text into lib/Kconfig.debug
      and modify it there to be more explicit about when you should say N to
      this config.
      
      Also, make the text a bit more generic by stating that this option
      enables compile time checks so we can cover architectures which emit
      warnings vs.  ones which emit errors.  The details of how an
      architecture decided to implement the checks isn't as important as the
      concept of compile time checking of copy_from_user() calls.
      
      While we're doing this, remove all the copy_from_user_overflow() code
      that's duplicated many times and place it into lib/ so that any
      architecture supporting this option can get the function for free.
      Signed-off-by: default avatarStephen Boyd <sboyd@codeaurora.org>
      Acked-by: default avatarArnd Bergmann <arnd@arndb.de>
      Acked-by: default avatarIngo Molnar <mingo@kernel.org>
      Acked-by: default avatarH. Peter Anvin <hpa@zytor.com>
      Cc: Arjan van de Ven <arjan@linux.intel.com>
      Acked-by: default avatarHelge Deller <deller@gmx.de>
      Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
      Cc: Stephen Rothwell <sfr@canb.auug.org.au>
      Cc: Chris Metcalf <cmetcalf@tilera.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      446f24d1
  10. 26 Apr, 2013 1 commit
  11. 17 Apr, 2013 1 commit
  12. 08 Apr, 2013 1 commit
  13. 12 Mar, 2013 1 commit
  14. 04 Mar, 2013 1 commit
  15. 28 Feb, 2013 1 commit
  16. 14 Feb, 2013 2 commits
  17. 03 Feb, 2013 7 commits
  18. 11 Jan, 2013 1 commit
  19. 19 Dec, 2012 1 commit
  20. 05 Dec, 2012 1 commit
  21. 30 Nov, 2012 1 commit
  22. 29 Nov, 2012 1 commit
  23. 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
  24. 17 Nov, 2012 1 commit
  25. 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
  26. 29 Oct, 2012 1 commit
  27. 18 Oct, 2012 1 commit
  28. 09 Oct, 2012 3 commits
  29. 01 Oct, 2012 1 commit