1. 14 Mar, 2018 6 commits
    • Marc Zyngier's avatar
      kvm: arm/arm64: vgic-v3: Tighten synchronization for guests using v2 on v3 · 27e91ad1
      Marc Zyngier authored
      On guest exit, and when using GICv2 on GICv3, we use a dsb(st) to
      force synchronization between the memory-mapped guest view and
      the system-register view that the hypervisor uses.
      
      This is incorrect, as the spec calls out the need for "a DSB whose
      required access type is both loads and stores with any Shareability
      attribute", while we're only synchronizing stores.
      
      We also lack an isb after the dsb to ensure that the latter has
      actually been executed before we start reading stuff from the sysregs.
      
      The fix is pretty easy: turn dsb(st) into dsb(sy), and slap an isb()
      just after.
      
      Cc: stable@vger.kernel.org
      Fixes: f68d2b1b ("arm64: KVM: Implement vgic-v3 save/restore")
      Acked-by: default avatarChristoffer Dall <cdall@kernel.org>
      Reviewed-by: default avatarAndre Przywara <andre.przywara@arm.com>
      Signed-off-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
      27e91ad1
    • Marc Zyngier's avatar
      KVM: arm/arm64: vgic: Don't populate multiple LRs with the same vintid · 16ca6a60
      Marc Zyngier authored
      The vgic code is trying to be clever when injecting GICv2 SGIs,
      and will happily populate LRs with the same interrupt number if
      they come from multiple vcpus (after all, they are distinct
      interrupt sources).
      
      Unfortunately, this is against the letter of the architecture,
      and the GICv2 architecture spec says "Each valid interrupt stored
      in the List registers must have a unique VirtualID for that
      virtual CPU interface.". GICv3 has similar (although slightly
      ambiguous) restrictions.
      
      This results in guests locking up when using GICv2-on-GICv3, for
      example. The obvious fix is to stop trying so hard, and inject
      a single vcpu per SGI per guest entry. After all, pending SGIs
      with multiple source vcpus are pretty rare, and are mostly seen
      in scenario where the physical CPUs are severely overcomitted.
      
      But as we now only inject a single instance of a multi-source SGI per
      vcpu entry, we may delay those interrupts for longer than strictly
      necessary, and run the risk of injecting lower priority interrupts
      in the meantime.
      
      In order to address this, we adopt a three stage strategy:
      - If we encounter a multi-source SGI in the AP list while computing
        its depth, we force the list to be sorted
      - When populating the LRs, we prevent the injection of any interrupt
        of lower priority than that of the first multi-source SGI we've
        injected.
      - Finally, the injection of a multi-source SGI triggers the request
        of a maintenance interrupt when there will be no pending interrupt
        in the LRs (HCR_NPIE).
      
      At the point where the last pending interrupt in the LRs switches
      from Pending to Active, the maintenance interrupt will be delivered,
      allowing us to add the remaining SGIs using the same process.
      
      Cc: stable@vger.kernel.org
      Fixes: 0919e84c ("KVM: arm/arm64: vgic-new: Add IRQ sync/flush framework")
      Acked-by: default avatarChristoffer Dall <cdall@kernel.org>
      Signed-off-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
      16ca6a60
    • Ard Biesheuvel's avatar
      KVM: arm/arm64: Reduce verbosity of KVM init log · 76600428
      Ard Biesheuvel authored
      On my GICv3 system, the following is printed to the kernel log at boot:
      
         kvm [1]: 8-bit VMID
         kvm [1]: IDMAP page: d20e35000
         kvm [1]: HYP VA range: 800000000000:ffffffffffff
         kvm [1]: vgic-v2@2c020000
         kvm [1]: GIC system register CPU interface enabled
         kvm [1]: vgic interrupt IRQ1
         kvm [1]: virtual timer IRQ4
         kvm [1]: Hyp mode initialized successfully
      
      The KVM IDMAP is a mapping of a statically allocated kernel structure,
      and so printing its physical address leaks the physical placement of
      the kernel when physical KASLR in effect. So change the kvm_info() to
      kvm_debug() to remove it from the log output.
      
      While at it, trim the output a bit more: IRQ numbers can be found in
      /proc/interrupts, and the HYP VA and vgic-v2 lines are not highly
      informational either.
      
      Cc: <stable@vger.kernel.org>
      Acked-by: default avatarWill Deacon <will.deacon@arm.com>
      Acked-by: default avatarChristoffer Dall <cdall@kernel.org>
      Signed-off-by: default avatarArd Biesheuvel <ard.biesheuvel@linaro.org>
      Signed-off-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
      76600428
    • Christoffer Dall's avatar
      KVM: arm/arm64: Reset mapped IRQs on VM reset · 413aa807
      Christoffer Dall authored
      We currently don't allow resetting mapped IRQs from userspace, because
      their state is controlled by the hardware.  But we do need to reset the
      state when the VM is reset, so we provide a function for the 'owner' of
      the mapped interrupt to reset the interrupt state.
      
      Currently only the timer uses mapped interrupts, so we call this
      function from the timer reset logic.
      
      Cc: stable@vger.kernel.org
      Fixes: 4c60e360 ("KVM: arm/arm64: Provide a get_input_level for the arch timer")
      Signed-off-by: default avatarChristoffer Dall <cdall@kernel.org>
      Signed-off-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
      413aa807
    • Christoffer Dall's avatar
      KVM: arm/arm64: Avoid vcpu_load for other vcpu ioctls than KVM_RUN · e21a4f3a
      Christoffer Dall authored
      Calling vcpu_load() registers preempt notifiers for this vcpu and calls
      kvm_arch_vcpu_load().  The latter will soon be doing a lot of heavy
      lifting on arm/arm64 and will try to do things such as enabling the
      virtual timer and setting us up to handle interrupts from the timer
      hardware.
      
      Loading state onto hardware registers and enabling hardware to signal
      interrupts can be problematic when we're not actually about to run the
      VCPU, because it makes it difficult to establish the right context when
      handling interrupts from the timer, and it makes the register access
      code difficult to reason about.
      
      Luckily, now when we call vcpu_load in each ioctl implementation, we can
      simply remove the call from the non-KVM_RUN vcpu ioctls, and our
      kvm_arch_vcpu_load() is only used for loading vcpu content to the
      physical CPU when we're actually going to run the vcpu.
      
      Cc: stable@vger.kernel.org
      Fixes: 9b062471 ("KVM: Move vcpu_load to arch-specific kvm_arch_vcpu_ioctl")
      Reviewed-by: default avatarJulien Grall <julien.grall@arm.com>
      Reviewed-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
      Reviewed-by: default avatarAndrew Jones <drjones@redhat.com>
      Signed-off-by: default avatarChristoffer Dall <christoffer.dall@linaro.org>
      Signed-off-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
      e21a4f3a
    • Andre Przywara's avatar
      KVM: arm/arm64: vgic: Add missing irq_lock to vgic_mmio_read_pending · 62b06f8f
      Andre Przywara authored
      Our irq_is_pending() helper function accesses multiple members of the
      vgic_irq struct, so we need to hold the lock when calling it.
      Add that requirement as a comment to the definition and take the lock
      around the call in vgic_mmio_read_pending(), where we were missing it
      before.
      
      Fixes: 96b29800 ("KVM: arm/arm64: vgic-new: Add PENDING registers handlers")
      Signed-off-by: default avatarAndre Przywara <andre.przywara@arm.com>
      Signed-off-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
      62b06f8f
  2. 15 Feb, 2018 2 commits
    • Arnd Bergmann's avatar
      ARM: kvm: fix building with gcc-8 · 67870eb1
      Arnd Bergmann authored
      In banked-sr.c, we use a top-level '__asm__(".arch_extension virt")'
      statement to allow compilation of a multi-CPU kernel for ARMv6
      and older ARMv7-A that don't normally support access to the banked
      registers.
      
      This is considered to be a programming error by the gcc developers
      and will no longer work in gcc-8, where we now get a build error:
      
      /tmp/cc4Qy7GR.s:34: Error: Banked registers are not available with this architecture. -- `mrs r3,SP_usr'
      /tmp/cc4Qy7GR.s:41: Error: Banked registers are not available with this architecture. -- `mrs r3,ELR_hyp'
      /tmp/cc4Qy7GR.s:55: Error: Banked registers are not available with this architecture. -- `mrs r3,SP_svc'
      /tmp/cc4Qy7GR.s:62: Error: Banked registers are not available with this architecture. -- `mrs r3,LR_svc'
      /tmp/cc4Qy7GR.s:69: Error: Banked registers are not available with this architecture. -- `mrs r3,SPSR_svc'
      /tmp/cc4Qy7GR.s:76: Error: Banked registers are not available with this architecture. -- `mrs r3,SP_abt'
      
      Passign the '-march-armv7ve' flag to gcc works, and is ok here, because
      we know the functions won't ever be called on pre-ARMv7VE machines.
      Unfortunately, older compiler versions (4.8 and earlier) do not understand
      that flag, so we still need to keep the asm around.
      
      Backporting to stable kernels (4.6+) is needed to allow those to be built
      with future compilers as well.
      
      Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84129
      Fixes: 33280b4c ("ARM: KVM: Add banked registers save/restore")
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
      Signed-off-by: default avatarChristoffer Dall <christoffer.dall@linaro.org>
      67870eb1
    • Christoffer Dall's avatar
      KVM: arm/arm64: Fix arch timers with userspace irqchips · d60d8b64
      Christoffer Dall authored
      When introducing support for irqchip in userspace we needed a way to
      mask the timer signal to prevent the guest continuously exiting due to a
      screaming timer.
      
      We did this by disabling the corresponding percpu interrupt on the
      host interrupt controller, because we cannot rely on the host system
      having a GIC, and therefore cannot make any assumptions about having an
      active state to hide the timer signal.
      
      Unfortunately, when introducing this feature, it became entirely
      possible that a VCPU which belongs to a VM that has a userspace irqchip
      can disable the vtimer irq on the host on some physical CPU, and then go
      away without ever enabling the vtimer irq on that physical CPU again.
      
      This means that using irqchips in userspace on a system that also
      supports running VMs with an in-kernel GIC can prevent forward progress
      from in-kernel GIC VMs.
      
      Later on, when we started taking virtual timer interrupts in the arch
      timer code, we would also leave this timer state active for userspace
      irqchip VMs, because we leave it up to a VGIC-enabled guest to
      deactivate the hardware IRQ using the HW bit in the LR.
      
      Both issues are solved by only using the enable/disable trick on systems
      that do not have a host GIC which supports the active state, because all
      VMs on such systems must use irqchips in userspace.  Systems that have a
      working GIC with support for an active state use the active state to
      mask the timer signal for both userspace and in-kernel irqchips.
      
      Cc: Alexander Graf <agraf@suse.de>
      Reviewed-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
      Cc: <stable@vger.kernel.org> # v4.12+
      Fixes: d9e13977 ("KVM: arm/arm64: Support arch timers with a userspace gic")
      Signed-off-by: default avatarChristoffer Dall <christoffer.dall@linaro.org>
      d60d8b64
  3. 11 Feb, 2018 9 commits
    • Linus Torvalds's avatar
      Linux 4.16-rc1 · 7928b2cb
      Linus Torvalds authored
      7928b2cb
    • Al Viro's avatar
      unify {de,}mangle_poll(), get rid of kernel-side POLL... · 7a163b21
      Al Viro authored
      except, again, POLLFREE and POLL_BUSY_LOOP.
      
      With this, we finally get to the promised end result:
      
       - POLL{IN,OUT,...} are plain integers and *not* in __poll_t, so any
         stray instances of ->poll() still using those will be caught by
         sparse.
      
       - eventpoll.c and select.c warning-free wrt __poll_t
      
       - no more kernel-side definitions of POLL... - userland ones are
         visible through the entire kernel (and used pretty much only for
         mangle/demangle)
      
       - same behavior as after the first series (i.e. sparc et.al. epoll(2)
         working correctly).
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      7a163b21
    • Linus Torvalds's avatar
      vfs: do bulk POLL* -> EPOLL* replacement · a9a08845
      Linus Torvalds authored
      This is the mindless scripted replacement of kernel use of POLL*
      variables as described by Al, done by this script:
      
          for V in IN OUT PRI ERR RDNORM RDBAND WRNORM WRBAND HUP RDHUP NVAL MSG; do
              L=`git grep -l -w POLL$V | grep -v '^t' | grep -v /um/ | grep -v '^sa' | grep -v '/poll.h$'|grep -v '^D'`
              for f in $L; do sed -i "-es/^\([^\"]*\)\(\<POLL$V\>\)/\\1E\\2/" $f; done
          done
      
      with de-mangling cleanups yet to come.
      
      NOTE! On almost all architectures, the EPOLL* constants have the same
      values as the POLL* constants do.  But they keyword here is "almost".
      For various bad reasons they aren't the same, and epoll() doesn't
      actually work quite correctly in some cases due to this on Sparc et al.
      
      The next patch from Al will sort out the final differences, and we
      should be all done.
      Scripted-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      a9a08845
    • Linus Torvalds's avatar
      Merge branch 'work.poll2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs · ee5daa13
      Linus Torvalds authored
      Pull more poll annotation updates from Al Viro:
       "This is preparation to solving the problems you've mentioned in the
        original poll series.
      
        After this series, the kernel is ready for running
      
            for V in IN OUT PRI ERR RDNORM RDBAND WRNORM WRBAND HUP RDHUP NVAL MSG; do
                  L=`git grep -l -w POLL$V | grep -v '^t' | grep -v /um/ | grep -v '^sa' | grep -v '/poll.h$'|grep -v '^D'`
                  for f in $L; do sed -i "-es/^\([^\"]*\)\(\<POLL$V\>\)/\\1E\\2/" $f; done
            done
      
        as a for bulk search-and-replace.
      
        After that, the kernel is ready to apply the patch to unify
        {de,}mangle_poll(), and then get rid of kernel-side POLL... uses
        entirely, and we should be all done with that stuff.
      
        Basically, that's what you suggested wrt KPOLL..., except that we can
        use EPOLL... instead - they already are arch-independent (and equal to
        what is currently kernel-side POLL...).
      
        After the preparations (in this series) switch to returning EPOLL...
        from ->poll() instances is completely mechanical and kernel-side
        POLL... can go away. The last step (killing kernel-side POLL... and
        unifying {de,}mangle_poll() has to be done after the
        search-and-replace job, since we need userland-side POLL... for
        unified {de,}mangle_poll(), thus the cherry-pick at the last step.
      
        After that we will have:
      
         - POLL{IN,OUT,...} *not* in __poll_t, so any stray instances of
           ->poll() still using those will be caught by sparse.
      
         - eventpoll.c and select.c warning-free wrt __poll_t
      
         - no more kernel-side definitions of POLL... - userland ones are
           visible through the entire kernel (and used pretty much only for
           mangle/demangle)
      
         - same behavior as after the first series (i.e. sparc et.al. epoll(2)
           working correctly)"
      
      * 'work.poll2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
        annotate ep_scan_ready_list()
        ep_send_events_proc(): return result via esed->res
        preparation to switching ->poll() to returning EPOLL...
        add EPOLLNVAL, annotate EPOLL... and event_poll->event
        use linux/poll.h instead of asm/poll.h
        xen: fix poll misannotation
        smc: missing poll annotations
      ee5daa13
    • Linus Torvalds's avatar
      Merge tag 'xtensa-20180211' of git://github.com/jcmvbkbc/linux-xtensa · 3fc928dc
      Linus Torvalds authored
      Pull xtense fix from Max Filippov:
       "Build fix for xtensa architecture with KASAN enabled"
      
      * tag 'xtensa-20180211' of git://github.com/jcmvbkbc/linux-xtensa:
        xtensa: fix build with KASAN
      3fc928dc
    • Linus Torvalds's avatar
      Merge tag 'nios2-v4.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/lftan/nios2 · 60d7a21a
      Linus Torvalds authored
      Pull nios2 update from Ley Foon Tan:
      
       - clean up old Kconfig options from defconfig
      
       - remove leading 0x and 0s from bindings notation in dts files
      
      * tag 'nios2-v4.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/lftan/nios2:
        nios2: defconfig: Cleanup from old Kconfig options
        nios2: dts: Remove leading 0x and 0s from bindings notation
      60d7a21a
    • Max Filippov's avatar
      xtensa: fix build with KASAN · f8d0cbf2
      Max Filippov authored
      The commit 917538e2 ("kasan: clean up KASAN_SHADOW_SCALE_SHIFT
      usage") removed KASAN_SHADOW_SCALE_SHIFT definition from
      include/linux/kasan.h and added it to architecture-specific headers,
      except for xtensa. This broke the xtensa build with KASAN enabled.
      Define KASAN_SHADOW_SCALE_SHIFT in arch/xtensa/include/asm/kasan.h
      
      Reported by: kbuild test robot <fengguang.wu@intel.com>
      Fixes: 917538e2 ("kasan: clean up KASAN_SHADOW_SCALE_SHIFT usage")
      Acked-by: default avatarAndrey Konovalov <andreyknvl@google.com>
      Signed-off-by: default avatarMax Filippov <jcmvbkbc@gmail.com>
      f8d0cbf2
    • Krzysztof Kozlowski's avatar
      nios2: defconfig: Cleanup from old Kconfig options · e0691ebb
      Krzysztof Kozlowski authored
      Remove old, dead Kconfig option INET_LRO. It is gone since
      commit 7bbf3cae ("ipv4: Remove inet_lro library").
      Signed-off-by: default avatarKrzysztof Kozlowski <krzk@kernel.org>
      Acked-by: default avatarLey Foon Tan <ley.foon.tan@intel.com>
      e0691ebb
    • Mathieu Malaterre's avatar
      nios2: dts: Remove leading 0x and 0s from bindings notation · 5d13c731
      Mathieu Malaterre authored
      Improve the DTS files by removing all the leading "0x" and zeros to fix the
      following dtc warnings:
      
      Warning (unit_address_format): Node /XXX unit name should not have leading "0x"
      
      and
      
      Warning (unit_address_format): Node /XXX unit name should not have leading 0s
      
      Converted using the following command:
      
      find . -type f \( -iname *.dts -o -iname *.dtsi \) -exec sed -E -i -e "s/@0x([0-9a-fA-F\.]+)\s?\{/@\L\1 \{/g" -e "s/@0+([0-9a-fA-F\.]+)\s?\{/@\L\1 \{/g" {} +
      
      For simplicity, two sed expressions were used to solve each warnings separately.
      
      To make the regex expression more robust a few other issues were resolved,
      namely setting unit-address to lower case, and adding a whitespace before the
      the opening curly brace:
      
      https://elinux.org/Device_Tree_Linux#Linux_conventions
      
      This is a follow up to commit 4c9847b7 ("dt-bindings: Remove leading 0x from bindings notation")
      Reported-by: default avatarDavid Daney <ddaney@caviumnetworks.com>
      Suggested-by: default avatarRob Herring <robh@kernel.org>
      Signed-off-by: default avatarMathieu Malaterre <malat@debian.org>
      Acked-by: default avatarLey Foon Tan <ley.foon.tan@intel.com>
      5d13c731
  4. 10 Feb, 2018 14 commits
    • Linus Torvalds's avatar
      Merge tag 'pci-v4.16-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci · d48fcbd8
      Linus Torvalds authored
      Pull PCI fix from Bjorn Helgaas:
       "Fix a POWER9/powernv INTx regression from the merge window (Alexey
        Kardashevskiy)"
      
      * tag 'pci-v4.16-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
        powerpc/pci: Fix broken INTx configuration via OF
      d48fcbd8
    • Linus Torvalds's avatar
      Merge tag 'for-linus-20180210' of git://git.kernel.dk/linux-block · 9454473c
      Linus Torvalds authored
      Pull block fixes from Jens Axboe:
       "A few fixes to round off the merge window on the block side:
      
         - a set of bcache fixes by way of Michael Lyle, from the usual bcache
           suspects.
      
         - add a simple-to-hook-into function for bpf EIO error injection.
      
         - fix blk-wbt that mischarectized flushes as reads. Improve the logic
           so that flushes and writes are accounted as writes, and only reads
           as reads. From me.
      
         - fix requeue crash in BFQ, from Paolo"
      
      * tag 'for-linus-20180210' of git://git.kernel.dk/linux-block:
        block, bfq: add requeue-request hook
        bcache: fix for data collapse after re-attaching an attached device
        bcache: return attach error when no cache set exist
        bcache: set writeback_rate_update_seconds in range [1, 60] seconds
        bcache: fix for allocator and register thread race
        bcache: set error_limit correctly
        bcache: properly set task state in bch_writeback_thread()
        bcache: fix high CPU occupancy during journal
        bcache: add journal statistic
        block: Add should_fail_bio() for bpf error injection
        blk-wbt: account flush requests correctly
      9454473c
    • Linus Torvalds's avatar
      Merge tag 'platform-drivers-x86-v4.16-3' of git://github.com/dvhart/linux-pdx86 · cc5cb5af
      Linus Torvalds authored
      Pull x86 platform driver updates from Darren Hart:
       "Mellanox fixes and new system type support.
      
        Mostly data for new system types with a correction and an
        uninitialized variable fix"
      
      [ Pulling from github because git.infradead.org currently seems to be
        down for some reason, but Darren had a backup location    - Linus ]
      
      * tag 'platform-drivers-x86-v4.16-3' of git://github.com/dvhart/linux-pdx86:
        platform/x86: mlx-platform: Add support for new 200G IB and Ethernet systems
        platform/x86: mlx-platform: Add support for new msn201x system type
        platform/x86: mlx-platform: Add support for new msn274x system type
        platform/x86: mlx-platform: Fix power cable setting for msn21xx family
        platform/x86: mlx-platform: Add define for the negative bus
        platform/x86: mlx-platform: Use defines for bus assignment
        platform/mellanox: mlxreg-hotplug: Fix uninitialized variable
      cc5cb5af
    • Linus Torvalds's avatar
      Merge tag 'chrome-platform-for-linus-4.16' of... · e9d46f74
      Linus Torvalds authored
      Merge tag 'chrome-platform-for-linus-4.16' of git://git.kernel.org/pub/scm/linux/kernel/git/bleung/chrome-platform
      
      Pull chrome platform updates from Benson Leung:
      
       - move cros_ec_dev to drivers/mfd
      
       - other small maintenance fixes
      
      [ The cros_ec_dev movement came in earlier through the MFD tree  - Linus ]
      
      * tag 'chrome-platform-for-linus-4.16' of git://git.kernel.org/pub/scm/linux/kernel/git/bleung/chrome-platform:
        platform/chrome: Use proper protocol transfer function
        platform/chrome: cros_ec_lpc: Add support for Google Glimmer
        platform/chrome: cros_ec_lpc: Register the driver if ACPI entry is missing.
        platform/chrome: cros_ec_lpc: remove redundant pointer request
        cros_ec: fix nul-termination for firmware build info
        platform/chrome: chromeos_laptop: make chromeos_laptop const
      e9d46f74
    • Linus Torvalds's avatar
      Merge tag 'kvm-4.16-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm · 15303ba5
      Linus Torvalds authored
      Pull KVM updates from Radim Krčmář:
       "ARM:
      
         - icache invalidation optimizations, improving VM startup time
      
         - support for forwarded level-triggered interrupts, improving
           performance for timers and passthrough platform devices
      
         - a small fix for power-management notifiers, and some cosmetic
           changes
      
        PPC:
      
         - add MMIO emulation for vector loads and stores
      
         - allow HPT guests to run on a radix host on POWER9 v2.2 CPUs without
           requiring the complex thread synchronization of older CPU versions
      
         - improve the handling of escalation interrupts with the XIVE
           interrupt controller
      
         - support decrement register migration
      
         - various cleanups and bugfixes.
      
        s390:
      
         - Cornelia Huck passed maintainership to Janosch Frank
      
         - exitless interrupts for emulated devices
      
         - cleanup of cpuflag handling
      
         - kvm_stat counter improvements
      
         - VSIE improvements
      
         - mm cleanup
      
        x86:
      
         - hypervisor part of SEV
      
         - UMIP, RDPID, and MSR_SMI_COUNT emulation
      
         - paravirtualized TLB shootdown using the new KVM_VCPU_PREEMPTED bit
      
         - allow guests to see TOPOEXT, GFNI, VAES, VPCLMULQDQ, and more
           AVX512 features
      
         - show vcpu id in its anonymous inode name
      
         - many fixes and cleanups
      
         - per-VCPU MSR bitmaps (already merged through x86/pti branch)
      
         - stable KVM clock when nesting on Hyper-V (merged through
           x86/hyperv)"
      
      * tag 'kvm-4.16-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (197 commits)
        KVM: PPC: Book3S: Add MMIO emulation for VMX instructions
        KVM: PPC: Book3S HV: Branch inside feature section
        KVM: PPC: Book3S HV: Make HPT resizing work on POWER9
        KVM: PPC: Book3S HV: Fix handling of secondary HPTEG in HPT resizing code
        KVM: PPC: Book3S PR: Fix broken select due to misspelling
        KVM: x86: don't forget vcpu_put() in kvm_arch_vcpu_ioctl_set_sregs()
        KVM: PPC: Book3S PR: Fix svcpu copying with preemption enabled
        KVM: PPC: Book3S HV: Drop locks before reading guest memory
        kvm: x86: remove efer_reload entry in kvm_vcpu_stat
        KVM: x86: AMD Processor Topology Information
        x86/kvm/vmx: do not use vm-exit instruction length for fast MMIO when running nested
        kvm: embed vcpu id to dentry of vcpu anon inode
        kvm: Map PFN-type memory regions as writable (if possible)
        x86/kvm: Make it compile on 32bit and with HYPYERVISOR_GUEST=n
        KVM: arm/arm64: Fixup userspace irqchip static key optimization
        KVM: arm/arm64: Fix userspace_irqchip_in_use counting
        KVM: arm/arm64: Fix incorrect timer_is_pending logic
        MAINTAINERS: update KVM/s390 maintainers
        MAINTAINERS: add Halil as additional vfio-ccw maintainer
        MAINTAINERS: add David as a reviewer for KVM/s390
        ...
      15303ba5
    • Alexey Kardashevskiy's avatar
      powerpc/pci: Fix broken INTx configuration via OF · c591c2e3
      Alexey Kardashevskiy authored
      59f47eff ("powerpc/pci: Use of_irq_parse_and_map_pci() helper")
      replaced of_irq_parse_pci() + irq_create_of_mapping() with
      of_irq_parse_and_map_pci(), but neglected to capture the virq
      returned by irq_create_of_mapping(), so virq remained zero, which
      caused INTx configuration to fail.
      
      Save the virq value returned by of_irq_parse_and_map_pci() and correct
      the virq declaration to match the of_irq_parse_and_map_pci() signature.
      
      Fixes: 59f47eff "powerpc/pci: Use of_irq_parse_and_map_pci() helper"
      Signed-off-by: default avatarAlexey Kardashevskiy <aik@ozlabs.ru>
      [bhelgaas: changelog]
      Signed-off-by: default avatarBjorn Helgaas <bhelgaas@google.com>
      c591c2e3
    • Linus Torvalds's avatar
      Merge tag 'kbuild-v4.16-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild · 9a61df9e
      Linus Torvalds authored
      Pull more Kbuild updates from Masahiro Yamada:
       "Makefile changes:
         - enable unused-variable warning that was wrongly disabled for clang
      
        Kconfig changes:
         - warn about blank 'help' and fix existing instances
         - fix 'choice' behavior to not write out invisible symbols
         - fix misc weirdness
      
        Coccinell changes:
         - fix false positive of free after managed memory alloc detection
         - improve performance of NULL dereference detection"
      
      * tag 'kbuild-v4.16-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (21 commits)
        kconfig: remove const qualifier from sym_expand_string_value()
        kconfig: add xrealloc() helper
        kconfig: send error messages to stderr
        kconfig: echo stdin to stdout if either is redirected
        kconfig: remove check_stdin()
        kconfig: remove 'config*' pattern from .gitignnore
        kconfig: show '?' prompt even if no help text is available
        kconfig: do not write choice values when their dependency becomes n
        coccinelle: deref_null: avoid useless computation
        coccinelle: devm_free: reduce false positives
        kbuild: clang: disable unused variable warnings only when constant
        kconfig: Warn if help text is blank
        nios2: kconfig: Remove blank help text
        arm: vt8500: kconfig: Remove blank help text
        MIPS: kconfig: Remove blank help text
        MIPS: BCM63XX: kconfig: Remove blank help text
        lib/Kconfig.debug: Remove blank help text
        Staging: rtl8192e: kconfig: Remove blank help text
        Staging: rtl8192u: kconfig: Remove blank help text
        mmc: kconfig: Remove blank help text
        ...
      9a61df9e
    • Al Viro's avatar
      7a501609
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs · 878e66d0
      Linus Torvalds authored
      Pull misc vfs fixes from Al Viro.
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
        seq_file: fix incomplete reset on read from zero offset
        kernfs: fix regression in kernfs_fop_write caused by wrong type
      878e66d0
    • Masahiro Yamada's avatar
      kconfig: remove const qualifier from sym_expand_string_value() · 523ca58b
      Masahiro Yamada authored
      This function returns realloc'ed memory, so the returned pointer
      must be passed to free() when done.  So, 'const' qualifier is odd.
      It is allowed to modify the expanded string.
      Signed-off-by: default avatarMasahiro Yamada <yamada.masahiro@socionext.com>
      523ca58b
    • Masahiro Yamada's avatar
      kconfig: add xrealloc() helper · d717f24d
      Masahiro Yamada authored
      We already have xmalloc(), xcalloc().  Add xrealloc() as well
      to save tedious error handling.
      Signed-off-by: default avatarMasahiro Yamada <yamada.masahiro@socionext.com>
      d717f24d
    • Vadim Pasternak's avatar
      platform/x86: mlx-platform: Add support for new 200G IB and Ethernet systems · 1bd42d94
      Vadim Pasternak authored
      It adds support for new Mellanox system types of basic classes qmb7, sn34,
      sn37, containing systems QMB700 (40x200GbE InfiniBand switch), SN3700
      (32x200GbE and 16x400GbE Ethernet switch) and SN3410 (6x400GbE plus
      48x50GbE Ethernet switch). These are the Top of the Rack systems, equipped
      with Mellanox COM-Express carrier board and switch board with Mellanox
      Quantum device, which supports InfiniBand switching with 40X200G ports and
      line rate of up to HDR speed or with Mellanox Spectrum-2 device, which
      supports Ethernet switching with 32X200G ports line rate of up to HDR
      speed.
      Signed-off-by: default avatarVadim Pasternak <vadimp@mellanox.com>
      Signed-off-by: default avatarDarren Hart (VMware) <dvhart@infradead.org>
      1bd42d94
    • Vadim Pasternak's avatar
      platform/x86: mlx-platform: Add support for new msn201x system type · a49a4148
      Vadim Pasternak authored
      It adds support for new Mellanox system types of basic half unit size
      class msn201x, containing system MSN2010 (18x10GbE plus 4x4x25GbE) half
      and its derivatives. This is the Top of the Rack system, equipped with
      Mellanox Small Form Factor carrier board and switch board with Mellanox
      Spectrum device, which supports Ethernet switching with 32X100G ports line
      rate of up to EDR speed.
      Signed-off-by: default avatarVadim Pasternak <vadimp@mellanox.com>
      Signed-off-by: default avatarDarren Hart (VMware) <dvhart@infradead.org>
      a49a4148
    • Vadim Pasternak's avatar
      platform/x86: mlx-platform: Add support for new msn274x system type · ef08e14a
      Vadim Pasternak authored
      It adds support for new Mellanox system types of basic class msn274x,
      containing system MSN2740 (32x100GbE Ethernet switch with cost reduction)
      and its derivatives. These are the Top of the Rack system, equipped with
      Mellanox Small Form Factor carrier board and switch board with Mellanox
      Spectrum device, which supports Ethernet switching with 32X100G ports line
      rate of up to EDR speed.
      Signed-off-by: default avatarVadim Pasternak <vadimp@mellanox.com>
      Signed-off-by: default avatarDarren Hart (VMware) <dvhart@infradead.org>
      ef08e14a
  5. 09 Feb, 2018 9 commits
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net · c839682c
      Linus Torvalds authored
      Pull networking fixes from David Miller:
      
       1) Make allocations less aggressive in x_tables, from Minchal Hocko.
      
       2) Fix netfilter flowtable Kconfig deps, from Pablo Neira Ayuso.
      
       3) Fix connection loss problems in rtlwifi, from Larry Finger.
      
       4) Correct DRAM dump length for some chips in ath10k driver, from Yu
          Wang.
      
       5) Fix ABORT handling in rxrpc, from David Howells.
      
       6) Add SPDX tags to Sun networking drivers, from Shannon Nelson.
      
       7) Some ipv6 onlink handling fixes, from David Ahern.
      
       8) Netem packet scheduler interval calcualtion fix from Md. Islam.
      
       9) Don't put crypto buffers on-stack in rxrpc, from David Howells.
      
      10) Fix handling of error non-delivery status in netlink multicast
          delivery over multiple namespaces, from Nicolas Dichtel.
      
      11) Missing xdp flush in tuntap driver, from Jason Wang.
      
      12) Synchonize RDS protocol netns/module teardown with rds object
          management, from Sowini Varadhan.
      
      13) Add nospec annotations to mpls, from Dan Williams.
      
      14) Fix SKB truesize handling in TIPC, from Hoang Le.
      
      15) Interrupt masking fixes in stammc from Niklas Cassel.
      
      16) Don't allow ptr_ring objects to be sized outside of kmalloc's
          limits, from Jason Wang.
      
      17) Don't allow SCTP chunks to be built which will have a length
          exceeding the chunk header's 16-bit length field, from Alexey
          Kodanev.
      
      * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (82 commits)
        ibmvnic: Remove skb->protocol checks in ibmvnic_xmit
        bpf: fix rlimit in reuseport net selftest
        sctp: verify size of a new chunk in _sctp_make_chunk()
        s390/qeth: fix SETIP command handling
        s390/qeth: fix underestimated count of buffer elements
        ptr_ring: try vmalloc() when kmalloc() fails
        ptr_ring: fail early if queue occupies more than KMALLOC_MAX_SIZE
        net: stmmac: remove redundant enable of PMT irq
        net: stmmac: rename GMAC_INT_DEFAULT_MASK for dwmac4
        net: stmmac: discard disabled flags in interrupt status register
        ibmvnic: Reset long term map ID counter
        tools/libbpf: handle issues with bpf ELF objects containing .eh_frames
        selftests/bpf: add selftest that use test_libbpf_open
        selftests/bpf: add test program for loading BPF ELF files
        tools/libbpf: improve the pr_debug statements to contain section numbers
        bpf: Sync kernel ABI header with tooling header for bpf_common.h
        net: phy: fix phy_start to consider PHY_IGNORE_INTERRUPT
        net: thunder: change q_len's type to handle max ring size
        tipc: fix skb truesize/datasize ratio control
        net/sched: cls_u32: fix cls_u32 on filter replace
        ...
      c839682c
    • Linus Torvalds's avatar
      Merge tag 'nfs-for-4.16-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs · 82f0a41e
      Linus Torvalds authored
      Pull more NFS client updates from Trond Myklebust:
       "A few bugfixes and some small sunrpc latency/performance improvements
        before the merge window closes:
      
        Stable fixes:
      
         - fix an incorrect calculation of the RDMA send scatter gather
           element limit
      
         - fix an Oops when attempting to free resources after RDMA device
           removal
      
        Bugfixes:
      
         - SUNRPC: Ensure we always release the TCP socket in a timely fashion
           when the connection is shut down.
      
         - SUNRPC: Don't call __UDPX_INC_STATS() from a preemptible context
      
        Latency/Performance:
      
         - SUNRPC: Queue latency sensitive socket tasks to the less contended
           xprtiod queue
      
         - SUNRPC: Make the xprtiod workqueue unbounded.
      
         - SUNRPC: Make the rpciod workqueue unbounded"
      
      * tag 'nfs-for-4.16-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
        SUNRPC: Don't call __UDPX_INC_STATS() from a preemptible context
        fix parallelism for rpc tasks
        Make the xprtiod workqueue unbounded.
        SUNRPC: Queue latency-sensitive socket tasks to xprtiod
        SUNRPC: Ensure we always close the socket after a connection shuts down
        xprtrdma: Fix BUG after a device removal
        xprtrdma: Fix calculation of ri_max_send_sges
      82f0a41e
    • Linus Torvalds's avatar
      Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending · 858f45bf
      Linus Torvalds authored
      Pull SCSI target updates from Nicholas Bellinger:
       "The highlights include:
      
         - numerous target-core-user improvements related to queue full and
           timeout handling. (MNC)
      
         - prevent target-core-user corruption when invalid data page is
           requested. (MNC)
      
         - add target-core device action configfs attributes to allow
           user-space to trigger events separate from existing attributes
           exposed to end-users. (MNC)
      
         - fix iscsi-target NULL pointer dereference 4.6+ regression in CHAP
           error path. (David Disseldorp)
      
         - avoid target-core backend UNMAP callbacks if range is zero. (Andrei
           Vagin)
      
         - fix a iscsi-target 4.14+ regression related multiple PDU logins,
           that was exposed due to removal of TCP prequeue support. (Florian
           Westphal + MNC)
      
        Also, there is a iser-target bug still being worked on for post -rc1
        code to address a long standing issue resulting in persistent
        ib_post_send() failures, for RNICs with small max_send_sge"
      
      * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (36 commits)
        iscsi-target: make sure to wake up sleeping login worker
        tcmu: Fix trailing semicolon
        tcmu: fix cmd user after free
        target: fix destroy device in target_configure_device
        tcmu: allow userspace to reset ring
        target core: add device action configfs files
        tcmu: fix error return code in tcmu_configure_device()
        target_core_user: add cmd id to broken ring message
        target: add SAM_STAT_BUSY sense reason
        tcmu: prevent corruption when invalid data page requested
        target: don't call an unmap callback if a range length is zero
        target/iscsi: avoid NULL dereference in CHAP auth error path
        cxgbit: call neigh_event_send() to update MAC address
        target: tcm_loop: Use seq_puts() in tcm_loop_show_info()
        target: tcm_loop: Delete an unnecessary return statement in tcm_loop_submission_work()
        target: tcm_loop: Delete two unnecessary variable initialisations in tcm_loop_issue_tmr()
        target: tcm_loop: Combine substrings for 26 messages
        target: tcm_loop: Improve a size determination in two functions
        target: tcm_loop: Delete an error message for a failed memory allocation in four functions
        sbp-target: Delete an error message for a failed memory allocation in three functions
        ...
      858f45bf
    • Linus Torvalds's avatar
      Merge tag 'trace-v4.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace · 8158c2ff
      Linus Torvalds authored
      Pull tracing fixes from Steven Rostedt:
       "Al Viro discovered some breakage with the parsing of the
        set_ftrace_filter as well as the removing of function probes.
      
        This fixes the code with Al's suggestions. I also added a few
        selftests to test the broken cases such that they wont happen
        again"
      
      * tag 'trace-v4.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
        selftests/ftrace: Add more tests for removing of function probes
        selftests/ftrace: Add some missing glob checks
        selftests/ftrace: Have reset_ftrace_filter handle multiple instances
        selftests/ftrace: Have reset_ftrace_filter handle modules
        tracing: Fix parsing of globs with a wildcard at the beginning
        ftrace: Remove incorrect setting of glob search field
      8158c2ff
    • Linus Torvalds's avatar
      Merge tag '4.16-minor-rc-SMB3-fixes' of git://git.samba.org/sfrench/cifs-2.6 · a2834832
      Linus Torvalds authored
      Pull cifs fixes from Steve French:
       "There are a couple additional security fixes that are still being
        tested that are not in this set."
      
      * tag '4.16-minor-rc-SMB3-fixes' of git://git.samba.org/sfrench/cifs-2.6:
        Add missing structs and defines from recent SMB3.1.1 documentation
        address lock imbalance warnings in smbdirect.c
        cifs: silence compiler warnings showing up with gcc-8.0.0
        Add some missing debug fields in server and tcon structs
      a2834832
    • Linus Torvalds's avatar
      Merge tag 'fbdev-v4.16-fix' of git://github.com/bzolnier/linux · 58fcba61
      Linus Torvalds authored
      Pull fbdev fix from Bartlomiej Zolnierkiewicz:
       "Fix building of the omapfb driver (Tomi Valkeinen)"
      
      * tag 'fbdev-v4.16-fix' of git://github.com/bzolnier/linux:
        video: omapfb: fix missing #includes
      58fcba61
    • Radim Krčmář's avatar
      Merge tag 'kvm-ppc-next-4.16-2' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc · 1ab03c07
      Radim Krčmář authored
      Second PPC KVM update for 4.16
      
      Seven fixes that are either trivial or that address bugs that people
      are actually hitting.  The main ones are:
      
      - Drop spinlocks before reading guest memory
      
      - Fix a bug causing corruption of VCPU state in PR KVM with preemption
        enabled
      
      - Make HPT resizing work on POWER9
      
      - Add MMIO emulation for vector loads and stores, because guests now
        use these instructions in memcpy and similar routines.
      1ab03c07
    • Radim Krčmář's avatar
      Merge branch 'msr-bitmaps' of git://git.kernel.org/pub/scm/virt/kvm/kvm · 80132f4c
      Radim Krčmář authored
      This topic branch allocates separate MSR bitmaps for each VCPU.
      This is required for the IBRS enablement to choose, on a per-VM
      basis, whether to intercept the SPEC_CTRL and PRED_CMD MSRs;
      the IBRS enablement comes in through the tip tree.
      80132f4c
    • John Allen's avatar
      ibmvnic: Remove skb->protocol checks in ibmvnic_xmit · 2fa56a49
      John Allen authored
      Having these checks in ibmvnic_xmit causes problems with VLAN
      tagging and balance-alb/tlb bonding modes. The restriction they
      imposed can be removed.
      Signed-off-by: default avatarJohn Allen <jallen@linux.vnet.ibm.com>
      Signed-off-by: default avatarNathan Fontenot <nfont@linux.vnet.ibm.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      2fa56a49