1. 05 May, 2013 1 commit
  2. 15 Feb, 2013 4 commits
  3. 21 Jan, 2013 1 commit
  4. 10 Jan, 2013 2 commits
  5. 05 Sep, 2012 2 commits
  6. 08 May, 2012 1 commit
  7. 28 Mar, 2012 1 commit
  8. 08 Mar, 2012 1 commit
    • Benjamin Herrenschmidt's avatar
      powerpc: Disable interrupts in 64-bit kernel FP and vector faults · 9f2f79e3
      Benjamin Herrenschmidt authored
      
      
      If we get a floating point, altivec or vsx unavaible interrupt in
      kernel, we trigger a kernel error. There is no point preserving
      the interrupt state, in fact, that can even make debugging harder
      as the processor state might change (we may even preempt) between
      taking the exception and landing in a debugger.
      
      So just make those 3 disable interrupts unconditionally.
      Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      ---
      
      v2: On BookE only disable when hitting the kernel unavailable
          path, otherwise it will fail to restore softe as
          fast_exception_return doesn't do it.
      9f2f79e3
  9. 22 Feb, 2012 1 commit
  10. 08 Dec, 2011 3 commits
  11. 17 Nov, 2011 1 commit
  12. 07 Oct, 2011 1 commit
  13. 12 Jul, 2011 1 commit
  14. 29 Jun, 2011 1 commit
  15. 22 Jun, 2011 1 commit
    • Scott Wood's avatar
      powerpc/e500: fix breakage with fsl_rio_mcheck_exception · 82a9a480
      Scott Wood authored
      
      
      The wrong MCSR bit was being used on e500mc.  MCSR_BUS_RBERR only exists
      on e500v1/v2.  Use MCSR_LD on e500mc, and remove all MCSR checking
      in fsl_rio_mcheck_exception as we now no longer call that function
      if the appropriate bit in MCSR is not set.
      
      If RIO support was enabled at compile-time, but was never probed, just
      return from fsl_rio_mcheck_exception rather than dereference a NULL
      pointer.
      
      TODO: There is still a remaining, though comparitively minor, issue in
      that this recovery mechanism will falsely engage if there's an unrelated
      MCSR_LD event at the same time as a RIO error.
      Signed-off-by: default avatarScott Wood <scottwood@freescale.com>
      Signed-off-by: default avatarKumar Gala <galak@kernel.crashing.org>
      82a9a480
  16. 20 May, 2011 1 commit
  17. 13 May, 2011 1 commit
  18. 04 May, 2011 1 commit
  19. 27 Apr, 2011 2 commits
  20. 31 Mar, 2011 1 commit
  21. 21 Jan, 2011 3 commits
  22. 14 Oct, 2010 1 commit
  23. 09 Jul, 2010 1 commit
  24. 22 Jun, 2010 1 commit
    • K.Prasad's avatar
      powerpc, hw_breakpoint: Handle concurrent alignment interrupts · 2538c2d0
      K.Prasad authored
      
      
      If an alignment interrupt occurs on an instruction that is being
      single-stepped, the alignment interrupt handler currently handles
      the single-step condition by unconditionally sending a SIGTRAP to
      the process.  Other synchronous interrupts that result in the
      instruction being emulated do likewise.
      
      With hw_breakpoint support, the hw_breakpoint code needs to be able
      to intercept these single-step events as well as those where the
      instruction executes normally and a trace interrupt happens.
      
      Fix this by making emulate_single_step() use the existing
      single_step_exception() function instead of calling _exception()
      directly.  We then make single_step_exception() use the abstracted
      clear_single_step() rather than clearing bits in the MSR image
      directly so that emulate_single_step() will continue to work
      correctly on Book 3E processors.
      Signed-off-by: default avatarK.Prasad <prasad@linux.vnet.ibm.com>
      Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
      2538c2d0
  25. 21 May, 2010 2 commits
  26. 05 May, 2010 1 commit
  27. 30 Mar, 2010 1 commit
    • Tejun Heo's avatar
      include cleanup: Update gfp.h and slab.h includes to prepare for breaking... · 5a0e3ad6
      Tejun Heo authored
      include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
      
      percpu.h is included by sched.h and module.h and thus ends up being
      included when building most .c files.  percpu.h includes slab.h which
      in turn includes gfp.h making everything defined by the two files
      universally available and complicating inclusion dependencies.
      
      percpu.h -> slab.h dependency is about to be removed.  Prepare for
      this change by updating users of gfp and slab facilities include those
      headers directly instead of assuming availability.  As this conversion
      needs to touch large number of source files, the following script is
      used as the basis of conversion.
      
        http://userweb.kernel.org/~tj/misc/slabh-sweep.py
      
      
      
      The script does the followings.
      
      * Scan files for gfp and slab usages and update includes such that
        only the necessary includes are there.  ie. if only gfp is used,
        gfp.h, if slab is used, slab.h.
      
      * When the script inserts a new include, it looks at the include
        blocks and try to put the new include such that its order conforms
        to its surrounding.  It's put in the include block which contains
        core kernel includes, in the same order that the rest are ordered -
        alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
        doesn't seem to be any matching order.
      
      * If the script can't find a place to put a new include (mostly
        because the file doesn't have fitting include block), it prints out
        an error message indicating which .h file needs to be added to the
        file.
      
      The conversion was done in the following steps.
      
      1. The initial automatic conversion of all .c files updated slightly
         over 4000 files, deleting around 700 includes and adding ~480 gfp.h
         and ~3000 slab.h inclusions.  The script emitted errors for ~400
         files.
      
      2. Each error was manually checked.  Some didn't need the inclusion,
         some needed manual addition while adding it to implementation .h or
         embedding .c file was more appropriate for others.  This step added
         inclusions to around 150 files.
      
      3. The script was run again and the output was compared to the edits
         from #2 to make sure no file was left behind.
      
      4. Several build tests were done and a couple of problems were fixed.
         e.g. lib/decompress_*.c used malloc/free() wrappers around slab
         APIs requiring slab.h to be added manually.
      
      5. The script was run on all .h files but without automatically
         editing them as sprinkling gfp.h and slab.h inclusions around .h
         files could easily lead to inclusion dependency hell.  Most gfp.h
         inclusion directives were ignored as stuff from gfp.h was usually
         wildly available and often used in preprocessor macros.  Each
         slab.h inclusion directive was examined and added manually as
         necessary.
      
      6. percpu.h was updated not to include slab.h.
      
      7. Build test were done on the following configurations and failures
         were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
         distributed build env didn't work with gcov compiles) and a few
         more options had to be turned off depending on archs to make things
         build (like ipr on powerpc/64 which failed due to missing writeq).
      
         * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
         * powerpc and powerpc64 SMP allmodconfig
         * sparc and sparc64 SMP allmodconfig
         * ia64 SMP allmodconfig
         * s390 SMP allmodconfig
         * alpha SMP allmodconfig
         * um on x86_64 SMP allmodconfig
      
      8. percpu.h modifications were reverted so that it could be applied as
         a separate patch and serve as bisection point.
      
      Given the fact that I had only a couple of failures from tests on step
      6, I'm fairly confident about the coverage of this conversion patch.
      If there is a breakage, it's likely to be something in one of the arch
      headers which should be easily discoverable easily on most builds of
      the specific arch.
      Signed-off-by: default avatarTejun Heo <tj@kernel.org>
      Guess-its-ok-by: default avatarChristoph Lameter <cl@linux-foundation.org>
      Cc: Ingo Molnar <mingo@redhat.com>
      Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
      5a0e3ad6
  28. 19 Feb, 2010 1 commit
  29. 17 Feb, 2010 1 commit
    • Dave Kleikamp's avatar
      powerpc/booke: Add support for advanced debug registers · 3bffb652
      Dave Kleikamp authored
      
      
      powerpc/booke: Add support for advanced debug registers
      
      From: Dave Kleikamp <shaggy@linux.vnet.ibm.com>
      
      Based on patches originally written by Torez Smith.
      
      This patch defines context switch and trap related functionality
      for BookE specific Debug Registers. It adds support to ptrace()
      for setting and getting BookE related Debug Registers
      Signed-off-by: default avatarDave Kleikamp <shaggy@linux.vnet.ibm.com>
      Cc: Torez Smith  <lnxtorez@linux.vnet.ibm.com>
      Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
      Cc: David Gibson <dwg@au1.ibm.com>
      Cc: Josh Boyer <jwboyer@linux.vnet.ibm.com>
      Cc: Kumar Gala <galak@kernel.crashing.org>
      Cc: Sergio Durigan Junior <sergiodj@br.ibm.com>
      Cc: Thiago Jung Bauermann <bauerman@br.ibm.com>
      Cc: linuxppc-dev list <Linuxppc-dev@ozlabs.org>
      Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      3bffb652