1. 18 Oct, 2017 5 commits
    • Parav Pandit's avatar
      IB/core: Fix use workqueue without WQ_MEM_RECLAIM · 39baf103
      Parav Pandit authored
      The IB/core provides address resolution service and invokes callback
      handler when address resolve request completes of requester in worker
      thread context.
      
      Such caller might allocate or free memory in callback handler
      depending on the completion status to make further progress or to
      terminate a connection. Most ULPs resolve route which involves
      allocating route entry and path record elements in callback event handler.
      
      It has been noticed that WQ_MEM_RECLAIM flag should not be used for
      workers that tend to allocate memory in this [1] thread discussion.
      
      In order to mitigate this situation, WQ_MEM_RECLAIM flag was dropped for
      other such WQs in this [2] patch.
      
      Similar problem might arise with address resolution path, though its not
      yet noticed. The ib_addr workqueue is not memory reclaim path due to its
      nature of invoking callback that might allocate memory or don't free any
      memory under memory pressure.
      
      [1] https://www.spinics.net/lists/linux-rdma/msg53239.html
      [2] https://www.spinics.net/lists/linux-rdma/msg53416.html
      
      Fixes: f5481626 ("IB/addr: Remove deprecated create_singlethread_workqueue")
      Fixes: 5fff41e1
      
       ("IB/core: Fix race condition in resolving IP to MAC")
      Signed-off-by: default avatarParav Pandit <parav@mellanox.com>
      Reviewed-by: default avatarDaniel Jurgens <danielj@mellanox.com>
      Signed-off-by: default avatarLeon Romanovsky <leon@kernel.org>
      Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      39baf103
    • Parav Pandit's avatar
      IB/core: Fix unable to change lifespan entry for hw_counters · 79c4d80b
      Parav Pandit authored
      This patch fixes the case where 'lifespan' entry of the hw_counters
      is not writable. Currently write callback is not exposed for for
      the hw_counters sysfs operation. Due to this, modifying lifespan
      value results into permission denied error in below example.
      
      echo 10 > /sys/class/infiniband/mlx5_0/ports/1/hw_counters/lifespan
      -bash: /sys/class/infiniband/mlx5_0/ports/1/hw_counters/lifespan:
      Permission denied
      
      This patch adds the hook to modify any attribute which implements
      store() operation.
      
      Fixes: b40f4757
      
       ("IB/core: Make device counter infrastructure dynamic")
      Signed-off-by: default avatarParav Pandit <parav@mellanox.com>
      Reviewed-by: default avatarMark Bloch <markb@mellanox.com>
      Signed-off-by: default avatarLeon Romanovsky <leon@kernel.org>
      Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      79c4d80b
    • Parav Pandit's avatar
      IB: Let ib_core resolve destination mac address · c0348eb0
      Parav Pandit authored
      
      
      Since IB/core resolves the destination mac address for user and kernel
      consumers, avoid resolving in multiple provider drivers.
      
      Only ib_core resolves DMAC now, therefore resolve_eth_dmac is removed as
      exported symbol.
      Signed-off-by: default avatarParav Pandit <parav@mellanox.com>
      Signed-off-by: default avatarLeon Romanovsky <leon@kernel.org>
      Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      c0348eb0
    • Parav Pandit's avatar
      IB/core: Introduce and use rdma_create_user_ah · 5cda6587
      Parav Pandit authored
      
      
      Introduce rdma_create_user_ah API which allows passing udata to
      provider driver and additionally which resolves DMAC for RoCE.
      
      ib_resolve_eth_dmac() resolves destination mac address for unicast,
      multicast, link local ipv4 mapped ipv6 and ipv6 destination gid entry.
      This allows all RoCE provider drivers to avoid duplicating such code.
      
      Such change brings consistency where IB core always resolves dmac and pass
      it to RoCE provider drivers for user and kernel consumers, with this
      ah_attr->roce.dmac is always an input field for provider drivers.
      
      This uniformity avoids exporting ib_resolve_eth_dmac symbol to providers
      or other modules. Therefore its removed as exported symbol at later in
      the patch series.
      
      Now uverbs and umad both makes use of rdma_create_user_ah API which
      fixes the issue where umad has invalid DMAC for address.
      Signed-off-by: default avatarParav Pandit <parav@mellanox.com>
      Reviewed-by: default avatarDaniel Jurgens <danielj@mellanox.com>
      Signed-off-by: default avatarLeon Romanovsky <leon@kernel.org>
      Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      5cda6587
    • Doug Ledford's avatar
      Merge tag 'mlx5-updates-2017-10-11' of... · 2652c792
      Doug Ledford authored
      Merge tag 'mlx5-updates-2017-10-11' of git://git.kernel.org/pub/scm/linux/kernel/git/mellanox/linux
      
       into mlnx-shared
      
      mlx5-updates-2017-10-11: IPoIB Muli Pkey support
      
      This series provides the support for IPoIB Multi Pkey.  InfiniBand Pkeys
      are the equivalent of Ethernet vlans.  Currently IPoIB device driver
      supports only default Pkey and IPoIB Pkey child interfaces are not
      supported with IPoIB offloads mode, this series will add the support for
      that by allowing creating mlx5 multiple IPoIB netdevices with a
      non-default Pkey.
      
      mlx5 IPoIB Pkey child interface is smaller version of mlx5i IPoIB
      interfaces and shares most of its resources with the parent IPoIB
      interface, namely RX steering and ring queue resources.
      
      The only mlx5 resources a child Pkey interface will be creating are the
      TX rings, since they should be assigned to a specific Pkey.
      
      mlx5i Pkey netdev is implemented via new mlx5e netdev profile
      implemented in mlx5/core/ipoib/ipoib_vlan.c.
      
      The series starts with a refactoring of mlx5e PTP and mlx5 clock
      implementation to move the code to be part of mlx5 core rather than
      mlx5e netdevice, in order to make mlx5 clock and PTP registration part
      of the core to be shared with mlx5e master Ethernet netdev/IPoIB parent
      netdev and mlx5_ib in the near future.
      
      Add the support for attaching multiple underlay QPs for the different
      Pkeys in mlx5 core RX steering.
      
      Add Pkey index to rdma_netdev to add the ability to set PKEY index to
      lower IPoIB offload netdev.
      
      Use hash-table to map between DQPN (Destination QP number) to child
      netdev for the IPoIB parent netdev to forward RX packets to the
      corresponding child Pkey netdev, since the RX rings are shared.
      
      The reset of the series adds the ipoib child Pkey: mlx5e netdev profile,
      netdev nods implementation and minimal set of ethtool callbacks.
      
      Thanks,
      Saeed.
      Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
      2652c792
  2. 14 Oct, 2017 12 commits
  3. 09 Oct, 2017 1 commit
  4. 07 Oct, 2017 4 commits
  5. 06 Oct, 2017 18 commits
    • Linus Torvalds's avatar
      Merge tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux · dbeb1a8f
      Linus Torvalds authored
      Pull clk fixes from Stephen Boyd:
      
       - build fix to export the clk_bulk_prepare() symbol
      
       - suspend fix for Samsung Exynos SoCs where we need to keep clks on
         across suspend
      
       - two critical clk markings for clks that shouldn't ever turn off on
         Rockchip SoCs
      
       - a fix for a copy-paste mistake on Rockchip rk3128 causing some clks
         to touch the same bit and trample over one another
      
      * tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux:
        clk: samsung: exynos4: Enable VPLL and EPLL clocks for suspend/resume cycle
        clk: Export clk_bulk_prepare()
        clk: rockchip: add sclk_timer5 as critical clock on rk3128
        clk: rockchip: fix up rk3128 pvtm and mipi_24m gate regs error
        clk: rockchip: add pclk_pmu as critical clock on rk3128
      dbeb1a8f
    • Linus Torvalds's avatar
      Merge tag 'arc-4.14-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc · ed0f72f4
      Linus Torvalds authored
      Pull ARC udpates from Vineet Gupta:
      
       - updates for various platforms
      
       - boot log updates for upcoming HS48 family of cores (dual issue)
      
      * tag 'arc-4.14-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc:
        ARC: [plat-hsdk]: Add reset controller node to manage ethernet reset
        ARC: [plat-hsdk]: Temporary fix to set CPU frequency to 1GHz
        ARC: fix allnoconfig build warning
        ARCv2: boot log: identify HS48 cores (dual issue)
        ARC: boot log: decontaminate ARCv2 ISA_CONFIG register
        arc: remove redundant UTS_MACHINE define in arch/arc/Makefile
        ARC: [plat-eznps] Update platform maintainer as Noam left
        ARC: [plat-hsdk] use actual clk driver to manage cpu clk
        ARC: [*defconfig] Reenable soft lock-up detector
        ARC: [plat-axs10x] sdio: Temporary fix of sdio ciu frequency
        ARC: [plat-hsdk] sdio: Temporary fix of sdio ciu frequency
        ARC: [plat-axs103] Add temporary quirk to reset ethernet IP
      ed0f72f4
    • Linus Torvalds's avatar
      Merge tag 'xfs-4.14-fixes-4' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux · eab26ad1
      Linus Torvalds authored
      Pull xfs fixes from Darrick Wong:
      
       - fix a race between overlapping copy on write aio
      
       - fix cow fork swapping when we defragment reflinked files
      
      * tag 'xfs-4.14-fixes-4' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
        xfs: handle racy AIO in xfs_reflink_end_cow
        xfs: always swap the cow forks when swapping extents
      eab26ad1
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.dk/linux-block · 17d084c8
      Linus Torvalds authored
      Pull block fixes from Jens Axboe:
       "A collection of fixes for this series. This contains:
      
         - NVMe pull request from Christoph, one uuid attribute fix, and one
           fix for the controller memory buffer address for remapped BARs.
      
         - use-after-free fix for bsg, from Benjamin Block.
      
         - bcache race/use-after-free fix for a list traversal, fixing a
           regression in this merge window. From Coly Li.
      
         - null_blk change configfs dependency change from a 'depends' to a
           'select'. This is a change from this merge window as well. From me.
      
         - nbd signal fix from Josef, fixing a regression introduced with the
           status code changes.
      
         - nbd MAINTAINERS mailing list entry update.
      
         - blk-throttle stall fix from Joseph Qi.
      
         - blk-mq-debugfs fix from Omar, fixing an issue where we don't
           register the IO scheduler debugfs directory, if the driver is
           loaded with it. Only shows up if you switch through the sysfs
           interface"
      
      * 'for-linus' of git://git.kernel.dk/linux-block:
        bsg-lib: fix use-after-free under memory-pressure
        nvme-pci: Use PCI bus address for data/queues in CMB
        blk-mq-debugfs: fix device sched directory for default scheduler
        null_blk: change configfs dependency to select
        blk-throttle: fix possible io stall when upgrade to max
        MAINTAINERS: update list for NBD
        nbd: fix -ERESTARTSYS handling
        nvme: fix visibility of "uuid" ns attribute
        bcache: use llist_for_each_entry_safe() in __closure_wake_up()
      17d084c8
    • Linus Torvalds's avatar
      Merge tag 'pci-v4.14-fixes-4' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci · 80cf1f8c
      Linus Torvalds authored
      Pull PCI fixes from Bjorn Helgaas:
       "Fix legacy IDE probe issues exposed by recent PCI core IRQ mapping
        changes (Bartlomiej Zolnierkiewicz, Lorenzo Pieralisi)"
      
      * tag 'pci-v4.14-fixes-4' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
        ide: fix IRQ assignment for PCI bus order probing
        ide: pci: free PCI BARs on initialization failure
        ide: free hwif->portdev on hwif_init() failure
      80cf1f8c
    • Linus Torvalds's avatar
      Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux · 27549068
      Linus Torvalds authored
      Pull arm64 fixes from Catalin Marinas:
      
       - Bring initialisation of user space undefined instruction handling
         early (core_initcall) since late_initcall() happens after modprobe in
         initramfs is invoked. Similar fix for fpsimd initialisation
      
       - Increase the kernel stack when KASAN is enabled
      
       - Bring the PCI ACS enabling earlier via the
         iort_init_platform_devices()
      
       - Fix misleading data abort address printing (decimal vs hex)
      
      * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
        arm64: Ensure fpsimd support is ready before userspace is active
        arm64: Ensure the instruction emulation is ready for userspace
        arm64: Use larger stacks when KASAN is selected
        ACPI/IORT: Fix PCI ACS enablement
        arm64: fix misleading data abort decoding
      27549068
    • Linus Torvalds's avatar
      Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm · 8d473320
      Linus Torvalds authored
      Pull KVM fixes from Radim Krčmář:
      
       - fix PPC XIVE interrupt delivery
      
       - fix x86 RCU breakage from asynchronous page faults when built without
         PREEMPT_COUNT
      
       - fix x86 build with -frecord-gcc-switches
      
       - fix x86 build without X86_LOCAL_APIC
      
      * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
        KVM: add X86_LOCAL_APIC dependency
        x86/kvm: Move kvm_fastop_exception to .fixup section
        kvm/x86: Avoid async PF preempting the kernel incorrectly
        KVM: PPC: Book3S: Fix server always zero from kvmppc_xive_get_xive()
      8d473320
    • Linus Torvalds's avatar
      Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma · d109d83f
      Linus Torvalds authored
      Pull rdma fixes from Doug Ledford:
       "This is a pretty small pull request. Only 6 patches in total. There
        are no outstanding -rc patches on the mailing list after this pull
        request, so only if some new issues are discovered in the remainder of
        the rc cycles will you hear from me again.
      
        Summary:
         - a fix for iwpm netlink usage
         - a fix for error unwinding in mlx5
         - two fixes to vlan handling in qedr
         - a couple small i40iw fixes"
      
      * tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma:
        i40iw: Fix port number for query QP
        i40iw: Add missing memory barriers
        RDMA/qedr: Parse vlan priority as sl
        RDMA/qedr: Parse VLAN ID correctly and ignore the value of zero
        IB/mlx5: Fix label order in error path handling
        RDMA/iwpm: Properly mark end of NL messages
      d109d83f
    • Linus Torvalds's avatar
      Merge branch 'for-4.14-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux · bf2db0b9
      Linus Torvalds authored
      Pull btrfs fixes from David Sterba:
       "Two more fixes for bugs introduced in 4.13.
      
        The sector_t problem with 32bit architecture and !LBDAF config seems
        serious but the number of affected deployments is hopefully low.
      
        The clashing status bits could lead to a confusing in-memory state of
        the whole-filesystem operations if used with the quota override sysfs
        knob"
      
      * 'for-4.14-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
        Btrfs: fix overlap of fs_info::flags values
        btrfs: avoid overflow when sector_t is 32 bit
      bf2db0b9
    • Linus Torvalds's avatar
      Merge tag 'ceph-for-4.14-rc4' of git://github.com/ceph/ceph-client · b77779b9
      Linus Torvalds authored
      Pull ceph fixes from Ilya Dryomov:
       "Two fixups for CephFS snapshot-handling patches in -rc1"
      
      * tag 'ceph-for-4.14-rc4' of git://github.com/ceph/ceph-client:
        ceph: fix __choose_mds() for LSSNAP request
        ceph: properly queue cap snap for newly created snap realm
      b77779b9
    • Eugeniy Paltsev's avatar
      ARC: [plat-hsdk]: Add reset controller node to manage ethernet reset · ab8eb7db
      Eugeniy Paltsev authored
      
      
      DW ethernet controller on HSDK hangs sometimes after SW reset, so
      add reset node to make possible to reset DW ethernet controller HW.
      Signed-off-by: default avatarEugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
      Signed-off-by: default avatarVineet Gupta <vgupta@synopsys.com>
      ab8eb7db
    • Linus Torvalds's avatar
      Merge branch 'overlayfs-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs · 8d4ef4e1
      Linus Torvalds authored
      Pull overlayfs fixes from Miklos Szeredi:
       "Fix a regression in 4.14 and one in 4.13. The latter is a case when
        Docker is doing something it really shouldn't and gets away with it.
        We now print a warning instead of erroring out.
      
        There are also fixes to several error paths"
      
      * 'overlayfs-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs:
        ovl: fix regression caused by exclusive upper/work dir protection
        ovl: fix missing unlock_rename() in ovl_do_copy_up()
        ovl: fix dentry leak in ovl_indexdir_cleanup()
        ovl: fix dput() of ERR_PTR in ovl_cleanup_index()
        ovl: fix error value printed in ovl_lookup_index()
        ovl: fix may_write_real() for overlayfs directories
      8d4ef4e1
    • Linus Torvalds's avatar
      Merge tag 'powerpc-4.14-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux · 1249b571
      Linus Torvalds authored
      Pull powerpc fixes from Michael Ellerman:
       "Nine small fixes, really nothing that stands out.
      
        A work-around for a spurious MCE on Power9. A CXL fault handling fix,
        some fixes to the new XIVE code, and a fix to the new 32-bit
        STRICT_KERNEL_RWX code.
      
        Fixes for old code/stable: an fix to an incorrect TLB flush on boot
        but not on any current machines, a compile error on 4xx and a fix to
        memory hotplug when using radix (Power9).
      
        Thanks to: Anton Blanchard, Cédric Le Goater, Christian Lamparter,
        Christophe Leroy, Christophe Lombard, Guenter Roeck, Jeremy Kerr,
        Michael Neuling, Nicholas Piggin"
      
      * tag 'powerpc-4.14-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
        powerpc/powernv: Increase memory block size to 1GB on radix
        powerpc/mm: Call flush_tlb_kernel_range with interrupts enabled
        powerpc/xive: Clear XIVE internal structures when a CPU is removed
        powerpc/xive: Fix IPI reset
        powerpc/4xx: Fix compile error with 64K pages on 40x, 44x
        powerpc: Fix action argument for cpufeatures-based TLB flush
        cxl: Fix memory page not handled
        powerpc: Fix workaround for spurious MCE on POWER9
        powerpc: Handle MCE on POWER9 with only DSISR bit 30 set
      1249b571
    • Linus Torvalds's avatar
      Merge tag 'drm-fixes-for-v4.14-rc4' of git://people.freedesktop.org/~airlied/linux · 9c0c1ada
      Linus Torvalds authored
      Pull drm fixes from Dave Airlie:
       "Some i915 fixes from the last two weeks (as they were on a strange
        base and I just waited for rc3), also a single sun4i hdmi fix"
      
      * tag 'drm-fixes-for-v4.14-rc4' of git://people.freedesktop.org/~airlied/linux:
        drm/i915/glk: Fix DMC/DC state idleness calculation
        drm/i915/cnl: Reprogram DMC firmware after S3/S4 resume
        drm/i915: Fix DDI PHY init if it was already on
        drm/sun4i: hdmi: Disable clks in bind function error path and unbind function
        drm/i915/bios: ignore HDMI on port A
        drm/i915: remove redundant variable hw_check
        drm/i915: always update ELD connector type after get modes
      9c0c1ada
    • Linus Torvalds's avatar
      Merge branch 'core-watchdog-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 27efed3e
      Linus Torvalds authored
      Pull watchddog clean-up and fixes from Thomas Gleixner:
       "The watchdog (hard/softlockup detector) code is pretty much broken in
        its current state. The patch series addresses this by removing all
        duct tape and refactoring it into a workable state.
      
        The reasons why I ask for inclusion that late in the cycle are:
      
         1) The code causes lockdep splats vs. hotplug locking which get
            reported over and over. Unfortunately there is no easy fix.
      
         2) The risk of breakage is minimal because it's already broken
      
         3) As 4.14 is a long term stable kernel, I prefer to have working
            watchdog code in that and the lockdep issues resolved. I wouldn't
            ask you to pull if 4.14 wouldn't be a LTS kernel or if the
            solution would be easy to backport.
      
         4) The series was around before the merge window opened, but then got
            delayed due to the UP failure caused by the for_each_cpu()
            surprise which we discussed recently.
      
        Changes vs. V1:
      
         - Addressed your review points
      
         - Addressed the warning in the powerpc code which was discovered late
      
         - Changed two function names which made sense up to a certain point
           in the series. Now they match what they do in the end.
      
         - Fixed a 'unused variable' warning, which got not detected by the
           intel robot. I triggered it when trying all possible related config
           combinations manually. Randconfig testing seems not random enough.
      
        The changes have been tested by and reviewed by Don Zickus and tested
        and acked by Micheal Ellerman for powerpc"
      
      * 'core-watchdog-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (36 commits)
        watchdog/core: Put softlockup_threads_initialized under ifdef guard
        watchdog/core: Rename some softlockup_* functions
        powerpc/watchdog: Make use of watchdog_nmi_probe()
        watchdog/core, powerpc: Lock cpus across reconfiguration
        watchdog/core, powerpc: Replace watchdog_nmi_reconfigure()
        watchdog/hardlockup/perf: Fix spelling mistake: "permanetely" -> "permanently"
        watchdog/hardlockup/perf: Cure UP damage
        watchdog/hardlockup: Clean up hotplug locking mess
        watchdog/hardlockup/perf: Simplify deferred event destroy
        watchdog/hardlockup/perf: Use new perf CPU enable mechanism
        watchdog/hardlockup/perf: Implement CPU enable replacement
        watchdog/hardlockup/perf: Implement init time detection of perf
        watchdog/hardlockup/perf: Implement init time perf validation
        watchdog/core: Get rid of the racy update loop
        watchdog/core, powerpc: Make watchdog_nmi_reconfigure() two stage
        watchdog/sysctl: Clean up sysctl variable name space
        watchdog/sysctl: Get rid of the #ifdeffery
        watchdog/core: Clean up header mess
        watchdog/core: Further simplify sysctl handling
        watchdog/core: Get rid of the thread teardown/setup dance
        ...
      27efed3e
    • Suzuki K Poulose's avatar
      arm64: Ensure fpsimd support is ready before userspace is active · ae2e972d
      Suzuki K Poulose authored
      
      
      We register the pm/hotplug callbacks for FPSIMD as late_initcall,
      which happens after the userspace is active (from initramfs via
      populate_rootfs, a rootfs_initcall). Make sure we are ready even
      before the userspace could potentially use it, by promoting to
      a core_initcall.
      
      Cc: Will Deacon <will.deacon@arm.com>
      Cc: Mark Rutland <mark.rutland@arm.com>
      Cc: Dave Martin <dave.martin@arm.com>
      Signed-off-by: default avatarSuzuki K Poulose <suzuki.poulose@arm.com>
      Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
      ae2e972d
    • Suzuki K Poulose's avatar
      arm64: Ensure the instruction emulation is ready for userspace · c0d8832e
      Suzuki K Poulose authored
      
      
      We trap and emulate some instructions (e.g, mrs, deprecated instructions)
      for the userspace. However the handlers for these are registered as
      late_initcalls and the userspace could be up and running from the initramfs
      by that time (with populate_rootfs, which is a rootfs_initcall()). This
      could cause problems for the early applications ending up in failure
      like :
      
      [   11.152061] modprobe[93]: undefined instruction: pc=0000ffff8ca48ff4
      
      This patch promotes the specific calls to core_initcalls, which are
      guaranteed to be completed before we hit userspace.
      
      Cc: stable@vger.kernel.org
      Cc: Dave Martin <dave.martin@arm.com>
      Cc: Matthias Brugger <mbrugger@suse.com>
      Cc: James Morse <james.morse@arm.com>
      Reported-by: default avatarMatwey V. Kornilov <matwey.kornilov@gmail.com>
      Signed-off-by: default avatarSuzuki K Poulose <suzuki.poulose@arm.com>
      Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
      c0d8832e
    • Anton Blanchard's avatar
      powerpc/powernv: Increase memory block size to 1GB on radix · 53ecde0b
      Anton Blanchard authored
      Memory hot unplug on PowerNV radix hosts is broken. Our memory block
      size is 256MB but since we map the linear region with very large
      pages, each pte we tear down maps 1GB.
      
      A hot unplug of one 256MB memory block results in 768MB of memory
      getting unintentionally unmapped. At this point we are likely to oops.
      
      Fix this by increasing our memory block size to 1GB on PowerNV radix
      hosts.
      
      Fixes: 4b5d62ca
      
       ("powerpc/mm: add radix__remove_section_mapping()")
      Cc: stable@vger.kernel.org # v4.11+
      Signed-off-by: default avatarAnton Blanchard <anton@samba.org>
      Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      53ecde0b