1. 13 Jul, 2014 6 commits
    • Linus Torvalds's avatar
      Merge branch 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm · 5fa77b54
      Linus Torvalds authored
      Pull ARM fixes from Russell King:
       "Another round of fixes for ARM:
         - a set of kprobes fixes from Jon Medhurst
         - fix the revision checking for the L2 cache which wasn't noticed to
           have been broken"
      
      * 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm:
        ARM: l2c: fix revision checking
        ARM: kprobes: Fix test code compilation errors for ARMv4 targets
        ARM: kprobes: Disallow instructions with PC and register specified shift
        ARM: kprobes: Prevent known test failures stopping other tests running
      5fa77b54
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k · 33fe3aee
      Linus Torvalds authored
      Pull m68k fixes from Geert Uytterhoeven:
       "Summary:
        - Fix for a boot regression introduced in v3.16-rc1,
        - Fix for a build issue in -next"
      
      Christoph Hellwig questioned why mach_random_get_entropy should be
      exported to modules, and Geert explains that random_get_entropy() is
      called by at least the crypto layer and ends up using it on m68k.  On
      most other architectures it just uses get_cycles() (which is typically
      inlined and doesn't need exporting),
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k:
        m68k: Export mach_random_get_entropy to modules
        m68k: Fix boot regression on machines with RAM at non-zero
      33fe3aee
    • Linus Torvalds's avatar
      Merge branch 'parisc-3.16-5' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux · 54f8c2aa
      Linus Torvalds authored
      Pull parisc fixes from Helge Deller:
       "The major patch in here is one which fixes the fanotify_mark() syscall
        in the compat layer of the 64bit parisc kernel.  It went unnoticed so
        long, because the calling syntax when using a 64bit parameter in a
        32bit syscall is quite complex and even worse, it may be even
        different if you call syscall() or the glibc wrapper.  This patch
        makes the kernel accept the calling convention when called by the
        glibc wrapper.
      
        The other two patches are trivial and remove unused headers, #includes
        and adds the serial ports of the fastest C8000 workstation to the
        parisc-kernel internal hardware database"
      
      * 'parisc-3.16-5' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
        parisc: drop unused defines and header includes
        parisc: fix fanotify_mark() syscall on 32bit compat kernel
        parisc: add serial ports of C8000/1GHz machine to hardware database
      54f8c2aa
    • Helge Deller's avatar
      parisc: drop unused defines and header includes · fe22ddcb
      Helge Deller authored
      
      Signed-off-by: default avatarHelge Deller <deller@gmx.de>
      Cc: stable@vger.kernel.org # 3.13+
      fe22ddcb
    • Helge Deller's avatar
      parisc: fix fanotify_mark() syscall on 32bit compat kernel · ab8a261b
      Helge Deller authored
      
      
      On parisc we can not use the existing compat implementation for fanotify_mark()
      because for the 64bit mask parameter the higher and lower 32bits are ordered
      differently than what the compat function expects from big endian
      architectures.
      
      Specifically:
      It finally turned out, that on hppa we end up with different assignments
      of parameters to kernel arguments depending on if we call the glibc
      wrapper function
       int fanotify_mark (int __fanotify_fd, unsigned int __flags,
                          uint64_t __mask, int __dfd, const char *__pathname);
      or directly calling the syscall manually
       syscall(__NR_fanotify_mark, ...)
      
      Reason is, that the syscall() function is implemented as C-function and
      because we now have the sysno as first parameter in front of the other
      parameters the compiler will unexpectedly add an empty paramenter in
      front of the u64 value to ensure the correct calling alignment for 64bit
      values.
      This means, on hppa you can't simply use syscall() to call the kernel
      fanotify_mark() function directly, but you have to use the glibc
      function instead.
      
      This patch fixes the kernel in the hppa-arch specifc coding to adjust
      the parameters in a way as if userspace calls the glibc wrapper function
      fanotify_mark().
      Signed-off-by: default avatarHelge Deller <deller@gmx.de>
      Cc: stable@vger.kernel.org # 3.13+
      ab8a261b
    • Helge Deller's avatar
      parisc: add serial ports of C8000/1GHz machine to hardware database · eadcc720
      Helge Deller authored
      
      Signed-off-by: default avatarHelge Deller <deller@gmx.de>
      Cc: stable@vger.kernel.org # 3.13+
      eadcc720
  2. 12 Jul, 2014 11 commits
  3. 11 Jul, 2014 14 commits
  4. 10 Jul, 2014 9 commits
    • Anton Blanchard's avatar
      powerpc/perf: Never program book3s PMCs with values >= 0x80000000 · f5602941
      Anton Blanchard authored
      
      
      We are seeing a lot of PMU warnings on POWER8:
      
          Can't find PMC that caused IRQ
      
      Looking closer, the active PMC is 0 at this point and we took a PMU
      exception on the transition from negative to 0. Some versions of POWER8
      have an issue where they edge detect and not level detect PMC overflows.
      
      A number of places program the PMC with (0x80000000 - period_left),
      where period_left can be negative. We can either fix all of these or
      just ensure that period_left is always >= 1.
      
      This patch takes the second option.
      
      Cc: <stable@vger.kernel.org>
      Signed-off-by: default avatarAnton Blanchard <anton@samba.org>
      Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      f5602941
    • Linus Torvalds's avatar
      Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux · 85d90fae
      Linus Torvalds authored
      Pull drm fixes from Dave Airlie:
       "Nothing too scary, we have one outstanding i915 regression but Daniel
        has promised the fix as soon as he's finished testing it a bit.
      
        Fixes for the main x86 drivers:
         - radeon: dpm fixes, displayport regression fix
         - i915: quirks for backlight regression, edp reboot fix, valleyview
           black screen fixes
         - nouveau: display port regression fixes, fix for memory reclocking"
      
      * 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
        drm/radeon/dpm: Reenabling SS on Cayman
        drm/radeon: fix typo in ci_stop_dpm()
        drm/radeon: fix typo in golden register setup on evergreen
        drm/radeon: only print meaningful VM faults
        drm/radeon/dp: return -EIO for flags not zero case
        drm/i915/vlv: T12 eDP panel timing enforcement during reboot
        drm/i915: Only unbind vgacon, not other console drivers
        drm/i915: Don't clobber the GTT when it's within stolen memory
        drm/i915/vlv: Update the DSI ULPS entry/exit sequence
        drm/i915/vlv: DPI FIFO empty check is not needed
        drm/i915: Toshiba CB35 has a controllable backlight
        drm/i915: Acer C720 and C720P have controllable backlights
        drm/i915: quirk asserts controllable backlight presence, overriding VBT
        drm/nouveau/ram: fix test for gpio presence
        drm/nouveau/dp: workaround broken display
        drm/nouveau/dp: fix required link bandwidth calculations
        drm/nouveau/kms: restore fbcon after display has been resumed
        drm/nv50-/kms: pass a non-zero value for head to sor dpms methods
        drm/nouveau/fb: Prevent inlining of ramfuc_reg
        drm/gk104/ram: bash mpll bit 31 on
      85d90fae
    • Guenter Roeck's avatar
      powerpc: Disable RELOCATABLE for COMPILE_TEST with PPC64 · fb43e847
      Guenter Roeck authored
      
      
      powerpc:allmodconfig has been failing for some time with the following
      error.
      
      arch/powerpc/kernel/exceptions-64s.S: Assembler messages:
      arch/powerpc/kernel/exceptions-64s.S:1312: Error: attempt to move .org backwards
      make[1]: *** [arch/powerpc/kernel/head_64.o] Error 1
      
      A number of attempts to fix the problem by moving around code have been
      unsuccessful and resulted in failed builds for some configurations and
      the discovery of toolchain bugs.
      
      Fix the problem by disabling RELOCATABLE for COMPILE_TEST builds instead.
      While this is less than perfect, it avoids substantial code changes
      which would otherwise be necessary just to make COMPILE_TEST builds
      happy and might have undesired side effects.
      Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
      Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      fb43e847
    • Joel Stanley's avatar
      powerpc/perf: Clear MMCR2 when enabling PMU · b50a6c58
      Joel Stanley authored
      On POWER8 when switching to a KVM guest we set bits in MMCR2 to freeze
      the PMU counters. Aside from on boot they are then never reset,
      resulting in stuck perf counters for any user in the guest or host.
      
      We now set MMCR2 to 0 whenever enabling the PMU, which provides a sane
      state for perf to use the PMU counters under either the guest or the
      host.
      
      This was manifesting as a bug with ppc64_cpu --frequency:
      
          $ sudo ppc64_cpu --frequency
          WARNING: couldn't run on cpu 0
          WARNING: couldn't run on cpu 8
            ...
          WARNING: couldn't run on cpu 144
          WARNING: couldn't run on cpu 152
          min:    18446744073.710 GHz (cpu -1)
          max:    0.000 GHz (cpu -1)
          avg:    0.000 GHz
      
      The command uses a perf counter to measure CPU cycles over a fixed
      amount of time, in order to approximate the frequency of the machine.
      The counters were returning zero once a guest was started, regardless of
      weather it was still running or had been shut down.
      
      By dumping the value of MMCR2, it was observed that once a guest is
      running MMCR2 is set to 1s - which stops counters from running:
      
          $ sudo sh -c 'echo p > /proc/sysrq-trigger'
          CPU: 0 PMU registers, ppmu = POWER8 n_counters = 6
          PMC1:  5b635e38 PMC2: 00000000 PMC3: 00000000 PMC4: 00000000
          PMC5:  1bf5a646 PMC6: 5793d378 PMC7: deadbeef PMC8: deadbeef
          MMCR0: 0000000080000000 MMCR1: 000000001e000000 MMCRA: 0000040000000000
          MMCR2: fffffffffffffc00 EBBHR: 0000000000000000
          EBBRR: 0000000000000000 BESCR: 0000000000000000
          SIAR:  00000000000a51cc SDAR:  c00000000fc40000 SIER:  0000000001000000
      
      This is done unconditionally in book3s_hv_interrupts.S upon entering the
      guest, and the original value is only save/restored if the host has
      indicated it was using the PMU. This is okay, however the user of the
      PMU needs to ensure that it is in a defined state when it starts using
      it.
      
      Fixes: e05b9b9e
      
       ("powerpc/perf: Power8 PMU support")
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarJoel Stanley <joel@jms.id.au>
      Acked-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      b50a6c58
    • Joel Stanley's avatar
      powerpc/perf: Add PPMU_ARCH_207S define · 4d9690dd
      Joel Stanley authored
      
      
      Instead of separate bits for every POWER8 PMU feature, have a single one
      for v2.07 of the architecture.
      
      This saves us adding a MMCR2 define for a future patch.
      
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarJoel Stanley <joel@jms.id.au>
      Acked-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      4d9690dd
    • Joel Stanley's avatar
      powerpc/kvm: Remove redundant save of SIER AND MMCR2 · f73128f4
      Joel Stanley authored
      These two registers are already saved in the block above. Aside from
      being unnecessary, by the time we get down to the second save location
      r8 no longer contains MMCR2, so we are clobbering the saved value with
      PMC5.
      
      MMCR2 primarily consists of counter freeze bits. So restoring the value
      of PMC5 into MMCR2 will most likely have the effect of freezing
      counters.
      
      Fixes: 72cde5a8
      
       ("KVM: PPC: Book3S HV: Save/restore host PMU registers that are new in POWER8")
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarJoel Stanley <joel@jms.id.au>
      Acked-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      Acked-by: default avatarPaul Mackerras <paulus@samba.org>
      Reviewed-by: default avatarAlexander Graf <agraf@suse.de>
      Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      f73128f4
    • Preeti U Murthy's avatar
      powerpc/powernv: Check for IRQHAPPENED before sleeping · c733cf83
      Preeti U Murthy authored
      Commit 8d6f7c5a
      
      : "powerpc/powernv: Make it possible to skip the IRQHAPPENED
      check in power7_nap()" added code that prevents cpus from checking for
      pending interrupts just before entering sleep state, which is wrong. These
      interrupts are delivered during the soft irq disabled state of the cpu.
      
      A cpu cannot enter any idle state with pending interrupts because they will
      never be serviced until the next time the cpu is woken up by some other
      interrupt. Its only then that the pending interrupts are replayed. This can result
      in device timeouts or warnings about this cpu being stuck.
      
      This patch fixes ths issue by ensuring that cpus check for pending interrupts
      just before entering any idle state as long as they are not in the path of split
      core operations.
      Signed-off-by: default avatarPreeti U Murthy <preeti@linux.vnet.ibm.com>
      Acked-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      c733cf83
    • Michael Ellerman's avatar
      powerpc: Clean up MMU_FTRS_A2 and MMU_FTR_TYPE_3E · cd68098b
      Michael Ellerman authored
      In fb5a5157
      
       "powerpc: Remove platforms/wsp and associated pieces",
      we removed the last user of MMU_FTRS_A2. So remove it.
      
      MMU_FTRS_A2 was the last user of MMU_FTR_TYPE_3E, so remove it also.
      This leaves some unreachable code in mmu_context_nohash.c, so remove
      that also.
      Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      cd68098b
    • Michael Ellerman's avatar
      powerpc/cell: Fix compilation with CONFIG_COREDUMP=n · e623fbf1
      Michael Ellerman authored
      Commit 046d662f
      
       "coredump: make core dump functionality optional"
      made the coredump optional, but didn't update the spufs code that
      depends on it. That leads to build errors such as:
      
        arch/powerpc/platforms/built-in.o: In function `.spufs_arch_write_note':
        coredump.c:(.text+0x22cd4): undefined reference to `.dump_emit'
        coredump.c:(.text+0x22cf4): undefined reference to `.dump_emit'
        coredump.c:(.text+0x22d0c): undefined reference to `.dump_align'
        coredump.c:(.text+0x22d48): undefined reference to `.dump_emit'
        coredump.c:(.text+0x22e7c): undefined reference to `.dump_skip'
      
      Fix it by adding some ifdefs in the cell code.
      Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      e623fbf1