1. 22 May, 2015 4 commits
    • Alistair Popple's avatar
      powerpc/powernv: Reorder OPAL subsystem initialisation · 96e023e7
      Alistair Popple authored
      Most of the OPAL subsystems are always compiled in for PowerNV and
      many of them need to be initialised before or after other OPAL
      subsystems. Rather than trying to control this ordering through
      machine initcalls it is clearer and easier to control initialisation
      order with explicit calls in opal_init.
      Signed-off-by: default avatarAlistair Popple <alistair@popple.id.au>
      Cc: Mahesh Jagannath Salgaonkar <mahesh@linux.vnet.ibm.com>
      Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      96e023e7
    • Shreyas B. Prabhu's avatar
      powerpc/powernv: Introduce sysfs control for fastsleep workaround behavior · 5703d2f4
      Shreyas B. Prabhu authored
      Fastsleep is one of the idle state which cpuidle subsystem currently
      uses on power8 machines. In this state L2 cache is brought down to a
      threshold voltage. Therefore when the core is in fastsleep, the
      communication between L2 and L3 needs to be fenced. But there is a bug
      in the current power8 chips surrounding this fencing.
      
      OPAL provides a workaround which precludes the possibility of hitting
      this bug. But running with this workaround applied causes checkstop
      if any correctable error in L2 cache directory is detected. Hence OPAL
      also provides a way to undo the workaround.
      
      In the existing implementation, workaround is applied by the last thread
      of the core entering fastsleep and undone by the first thread waking up.
      But this has a performance cost. These OPAL calls account for roughly
      4000 cycles everytime the core has to enter or wakeup from fastsleep.
      
      This patch introduces a sysfs attribute (fastsleep_workaround_applyonce)
      to choose the behavior of this workaround.
      
      By default, fastsleep_workaround_applyonce = 0. In this case, workaround
      is applied/undone everytime the core enters/exits fastsleep.
      
      fastsleep_workaround_applyonce = 1. In this case the workaround is
      applied once on all the cores and never undone. This can be triggered by
      echo 1 > /sys/devices/system/cpu/fastsleep_workaround_applyonce
      
      For simplicity this attribute can be modified only once. Implying, once
      fastsleep_workaround_applyonce is changed to 1, it cannot be reverted
      to the default state.
      Signed-off-by: default avatarShreyas B. Prabhu <shreyas@linux.vnet.ibm.com>
      Reviewed-by: default avatarPreeti U Murthy <preeti@linux.vnet.ibm.com>
      Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      5703d2f4
    • Shreyas B. Prabhu's avatar
      powerpc/powernv: Move cpuidle related code from setup.c to new file · d405a98c
      Shreyas B. Prabhu authored
      This is a cleanup patch; doesn't change any functionality. Moves
      all cpuidle related code from setup.c to a new file.
      Signed-off-by: default avatarShreyas B. Prabhu <shreyas@linux.vnet.ibm.com>
      Reviewed-by: default avatarPreeti U Murthy <preeti@linux.vnet.ibm.com>
      [mpe: Fix the SMP=n build by including asm/smp.h in idle.c]
      Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      d405a98c
    • Shreyas B. Prabhu's avatar
      powerpc: Fix cpu_online_cores_map to return only online threads mask · e602ffb2
      Shreyas B. Prabhu authored
      Currently, cpu_online_cores_map returns a mask, which for every core with
      at least one online thread, has the bit for thread 0 of the core set to 1,
      and the bits for all other threads of the core set to 0. But thread 0 of
      the core itself may not be online always. In such cases, if the returned
      mask is used for IPI, then it'll cause IPIs to be skipped on cores where
      the first thread is offline, because the IPI code refuses to send IPIs to
      offline threads.
      
      Fix this by setting the bit of the first online thread in the core.
      This is done by fixing this in the underlying function
      cpu_thread_mask_to_cores.
      
      The result has the property that for all cores with online threads, there
      is one bit set in the returned map. And further, all bits that are set in
      the returned map correspond to online threads.
      Signed-off-by: default avatarShreyas B. Prabhu <shreyas@linux.vnet.ibm.com>
      Reviewed-by: default avatarPreeti U Murthy <preeti@linux.vnet.ibm.com>
      [ Changelog from Michael Ellerman <mpe@ellerman.id.au> ]
      Reviewed-by: default avatarGautham R. Shenoy <ego@linux.vnet.ibm.com>
      Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      e602ffb2
  2. 20 May, 2015 1 commit
    • Laurent Dufour's avatar
      powerpc: Enable sys_kcmp() for CRIU · 7978f76c
      Laurent Dufour authored
      The commit 8170a83f ("powerpc: Wireup the kcmp syscall to sys_ni") has
      disabled the kcmp syscall for powerpc.  This has been done due to the use
      of unsigned long parameters which may require a dedicated wrapper to handle
      32bit process on top of 64bit kernel.  However in the kcmp() case, the 2
      unsigned long parameters are currently only used to carry file descriptors
      from user space to the kernel.  Since such a parameter is passed through
      register, and file descriptor doesn't need to get extended, there is,
      today, no need for a wrapper.
      
      In the case there will be a need to pass address in or out of this system
      call, then a wrapper could be required, it will then be to care of it.
      
      As today this is not the case, it is safe to enable kcmp() on powerpc.
      
      Tested (by Laurent) on 64-bit, 32-bit, and 32-bit userspace on 64-bit
      kernel using tools/testing/selftests/kcmp [mpe].
      Signed-off-by: default avatarLaurent Dufour <ldufour@linux.vnet.ibm.com>
      Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      7978f76c
  3. 18 May, 2015 1 commit
  4. 13 May, 2015 4 commits
  5. 12 May, 2015 3 commits
  6. 11 May, 2015 12 commits
  7. 10 May, 2015 6 commits
    • Linus Torvalds's avatar
      Linux 4.1-rc3 · 030bbdbf
      Linus Torvalds authored
      030bbdbf
    • Linus Torvalds's avatar
      Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux · 01d07351
      Linus Torvalds authored
      Pull drm fixes from Dave Airlie:
       "I really need to get back to sending these on my Friday, instead of my
        Monday morning, but nothing too amazing in here: a few amdkfd fixes, a
        few radeon fixes, i915 fixes, one tegra fix and one core fix"
      
      * 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
        drm: Zero out invalid vblank timestamp in drm_update_vblank_count.
        drm/tegra: Don't use vblank_disable_immediate on incapable driver.
        drm/radeon: stop trying to suspend UVD sessions
        drm/radeon: more strictly validate the UVD codec
        drm/radeon: make UVD handle checking more strict
        drm/radeon: make VCE handle check more strict
        drm/radeon: fix userptr lockup
        drm/radeon: fix userptr BO unpin bug v3
        drm/amdkfd: Initialize sdma vm when creating sdma queue
        drm/amdkfd: Don't report local memory size
        drm/amdkfd: allow unregister process with queues
        drm/i915: Drop PIPE-A quirk for 945GSE HP Mini
        drm/i915: Sink rate read should be saved in deca-kHz
        drm/i915/dp: there is no audio on port A
        drm/i915: Add missing MacBook Pro models with dual channel LVDS
        drm/i915: Assume dual channel LVDS if pixel clock necessitates it
        drm/radeon: don't setup audio on asics that don't support it
        drm/radeon: disable semaphores for UVD V1 (v2)
      01d07351
    • Dave Airlie's avatar
      Merge tag 'drm-intel-fixes-2015-05-08' of git://anongit.freedesktop.org/drm-intel into drm-fixes · 332545b3
      Dave Airlie authored
      misc i915 fixes.
      
      * tag 'drm-intel-fixes-2015-05-08' of git://anongit.freedesktop.org/drm-intel:
        drm/i915: Drop PIPE-A quirk for 945GSE HP Mini
        drm/i915: Sink rate read should be saved in deca-kHz
        drm/i915/dp: there is no audio on port A
        drm/i915: Add missing MacBook Pro models with dual channel LVDS
        drm/i915: Assume dual channel LVDS if pixel clock necessitates it
      332545b3
    • Mario Kleiner's avatar
      drm: Zero out invalid vblank timestamp in drm_update_vblank_count. · fdb68e09
      Mario Kleiner authored
      Since commit 844b03f2 we make
      sure that after vblank irq off, we return the last valid
      (vblank count, vblank timestamp) pair to clients, e.g., during
      modesets, which is good.
      
      An overlooked side effect of that commit for kms drivers without
      support for precise vblank timestamping is that at vblank irq
      enable, when we update the vblank counter from the hw counter, we
      can't update the corresponding vblank timestamp, so now we have a
      totally mismatched timestamp for the new count to confuse clients.
      
      Restore old client visible behaviour from before Linux 3.17, but
      zero out the timestamp at vblank counter update (instead of disable
      as in original implementation) if we can't generate a meaningful
      timestamp immediately for the new vblank counter. This will fix
      this regression, so callers know they need to retry again later
      if they need a valid timestamp, but at the same time preserves
      the improvements made in the commit mentioned above.
      Signed-off-by: default avatarMario Kleiner <mario.kleiner.de@gmail.com>
      Cc: <stable@vger.kernel.org> #v3.17+
      
      Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
      Cc: Daniel Vetter <daniel@ffwll.ch>
      Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
      fdb68e09
    • Linus Torvalds's avatar
      Merge branch 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm · 41f2a93c
      Linus Torvalds authored
      Pull ARM fixes from Russell King:
       "A set of ARM fixes:
      
         - fix an off-by-one error in the iommu DMA ops, which caused errors
           with a 4GiB size.
      
         - remove comments mentioning the non-existent CONFIG_CPU_ARM1020_CPU_IDLE
           macro.
      
         - remove useless CONFIG_CPU_ICACHE_STREAMING_DISABLE blocks, where
           this symbol never appeared in any Kconfig.
      
         - fix Feroceon code to cope with a previous change correctly (it
           incorrectly left an additional word in an assembly structure
           definition)
      
         - avoid a misleading IRQ affinity warning in the ARM PMU code for
           IRQs which are already affine to their CPUs.
      
         - fix the node name printed in the IRQ affinity warning"
      
      * 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm:
        ARM: 8352/1: perf: Fix the pmu node name in warning message
        ARM: 8351/1: perf: don't warn about missing interrupt-affinity property for PPIs
        ARM: 8350/1: proc-feroceon: Fix feroceon_proc_info macro
        ARM: 8349/1: arch/arm/mm/proc-arm925.S: remove dead #ifdef block
        ARM: 8348/1: remove comments on CPU_ARM1020_CPU_IDLE
        ARM: 8347/1: dma-mapping: fix off-by-one check in arm_setup_iommu_dma_ops
      41f2a93c
    • Linus Torvalds's avatar
      Merge tag 'samsung-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung · 8425ac7a
      Linus Torvalds authored
      Pull samsung fixes from Kukjin Kim:
       "Here is Samsung fixes for v4.1.  Since I've missed to send this via
        arm-soc tree before v4.1-rc3, so I'm sending this to you directly
      
         - fix commit ea08de16 ("ARM: dts: Add DISP1 power domain for
           exynos5420") which causes 'unhandled fault: imprecise external
           abort' error when PD turned off.  ("make DP a consumer of DISP1
           power domain")
      
         - fix 's3c-rtc' probe failure on Odriod-X2/U2/U3 boards ("add
           'rtc_src' clock to rtc node for source clock of rtc")
      
         - fix typo for 'cpu-crit-0' trip point on exynos5420/5440
      
         - fix S2R failure on exynos5250-snow due to card power of Marvell
           WiFi driver (suspend/resume) ("add keep-power-in-susped to WiFi
           SDIO node")"
      
      * tag 'samsung-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung:
        ARM: dts: Add keep-power-in-suspend to WiFi SDIO node for exynos5250-snow
        ARM: dts: Fix typo in trip point temperature for exynos5420/5440
        ARM: dts: add 'rtc_src' clock to rtc node for exynos4412-odroid boards
        ARM: dts: Make DP a consumer of DISP1 power domain on Exynos5420
      8425ac7a
  8. 09 May, 2015 9 commits