1. 18 Jul, 2018 4 commits
    • Gautham R. Shenoy's avatar
      powerpc/powernv: Fix save/restore of SPRG3 on entry/exit from stop (idle) · b03897cf
      Gautham R. Shenoy authored
      On 64-bit servers, SPRN_SPRG3 and its userspace read-only mirror
      SPRN_USPRG3 are used as userspace VDSO write and read registers
      respectively.
      
      SPRN_SPRG3 is lost when we enter stop4 and above, and is currently not
      restored.  As a result, any read from SPRN_USPRG3 returns zero on an
      exit from stop4 (Power9 only) and above.
      
      Thus in this situation, on POWER9, any call from sched_getcpu() always
      returns zero, as on powerpc, we call __kernel_getcpu() which relies
      upon SPRN_USPRG3 to report the CPU and NUMA node information.
      
      Fix this by restoring SPRN_SPRG3 on wake up from a deep stop state
      with the sprg_vdso value that is cached in PACA.
      
      Fixes: e1c1cfed ("powerpc/powernv: Save/Restore additional SPRs for stop4 cpuidle")
      Cc: stable@vger.kernel.org # v4.14+
      Reported-by: default avatarFlorian Weimer <fweimer@redhat.com>
      Signed-off-by: default avatarGautham R. Shenoy <ego@linux.vnet.ibm.com>
      Reviewed-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      b03897cf
    • James Clarke's avatar
      powerpc/Makefile: Assemble with -me500 when building for E500 · 4e4a4b75
      James Clarke authored
      Some of the assembly files use instructions specific to BookE or E500,
      which are rejected with the now-default -mcpu=powerpc, so we must pass
      -me500 to the assembler just as we pass -me200 for E200.
      
      Fixes: 4bf4f42a ("powerpc/kbuild: Set default generic machine type for 32-bit compile")
      Signed-off-by: default avatarJames Clarke <jrtc27@jrtc27.com>
      Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      4e4a4b75
    • Alexey Kardashevskiy's avatar
      KVM: PPC: Check if IOMMU page is contained in the pinned physical page · 76fa4975
      Alexey Kardashevskiy authored
      A VM which has:
       - a DMA capable device passed through to it (eg. network card);
       - running a malicious kernel that ignores H_PUT_TCE failure;
       - capability of using IOMMU pages bigger that physical pages
      can create an IOMMU mapping that exposes (for example) 16MB of
      the host physical memory to the device when only 64K was allocated to the VM.
      
      The remaining 16MB - 64K will be some other content of host memory, possibly
      including pages of the VM, but also pages of host kernel memory, host
      programs or other VMs.
      
      The attacking VM does not control the location of the page it can map,
      and is only allowed to map as many pages as it has pages of RAM.
      
      We already have a check in drivers/vfio/vfio_iommu_spapr_tce.c that
      an IOMMU page is contained in the physical page so the PCI hardware won't
      get access to unassigned host memory; however this check is missing in
      the KVM fastpath (H_PUT_TCE accelerated code). We were lucky so far and
      did not hit this yet as the very first time when the mapping happens
      we do not have tbl::it_userspace allocated yet and fall back to
      the userspace which in turn calls VFIO IOMMU driver, this fails and
      the guest does not retry,
      
      This stores the smallest preregistered page size in the preregistered
      region descriptor and changes the mm_iommu_xxx API to check this against
      the IOMMU page size.
      
      This calculates maximum page size as a minimum of the natural region
      alignment and compound page size. For the page shift this uses the shift
      returned by find_linux_pte() which indicates how the page is mapped to
      the current userspace - if the page is huge and this is not a zero, then
      it is a leaf pte and the page is mapped within the range.
      
      Fixes: 121f80ba ("KVM: PPC: VFIO: Add in-kernel acceleration for VFIO")
      Cc: stable@vger.kernel.org # v4.12+
      Signed-off-by: default avatarAlexey Kardashevskiy <aik@ozlabs.ru>
      Reviewed-by: default avatarDavid Gibson <david@gibson.dropbear.id.au>
      Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      76fa4975
    • Alexey Kardashevskiy's avatar
      vfio/spapr: Use IOMMU pageshift rather than pagesize · 1463edca
      Alexey Kardashevskiy authored
      The size is always equal to 1 page so let's use this. Later on this will
      be used for other checks which use page shifts to check the granularity
      of access.
      
      This should cause no behavioral change.
      
      Cc: stable@vger.kernel.org # v4.12+
      Reviewed-by: default avatarDavid Gibson <david@gibson.dropbear.id.au>
      Acked-by: default avatarAlex Williamson <alex.williamson@redhat.com>
      Signed-off-by: default avatarAlexey Kardashevskiy <aik@ozlabs.ru>
      Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      1463edca
  2. 17 Jul, 2018 1 commit
    • Michael Ellerman's avatar
      powerpc/xmon: Fix disassembly since printf changes · 941d8107
      Michael Ellerman authored
      The recent change to add printf annotations to xmon inadvertently made
      the disassembly output ugly, eg:
      
        c00000002001e058  7ee00026      mfcr    r23
        c00000002001e05c  fffffffffae101a0      std     r23,416(r1)
        c00000002001e060  fffffffff8230000      std     r1,0(r3)
      
      The problem being that negative 32-bit values are being displayed in
      full 64-bits.
      
      The printf conversion was actually correct, we are passing unsigned
      long so it should use "lx". But powerpc instructions are only 4 bytes
      and the code only reads 4 bytes, so inst should really just be
      unsigned int, and that also fixes the printing to look the way we
      want:
      
        c00000002001e058  7ee00026      mfcr    r23
        c00000002001e05c  fae101a0      std     r23,416(r1)
        c00000002001e060  f8230000      std     r1,0(r3)
      
      Fixes: e70d8f55 ("powerpc/xmon: Add __printf annotation to xmon_printf()")
      Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      941d8107
  3. 01 Jul, 2018 7 commits
    • Linus Torvalds's avatar
      Linux 4.18-rc3 · 021c9179
      Linus Torvalds authored
      021c9179
    • Linus Torvalds's avatar
      Merge tag 'for-4.18-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux · d3bc0e67
      Linus Torvalds authored
      Pull btrfs fixes from David Sterba:
       "We have a few regression fixes for qgroup rescan status tracking and
        the vm_fault_t conversion that mixed up the error values"
      
      * tag 'for-4.18-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
        Btrfs: fix mount failure when qgroup rescan is in progress
        Btrfs: fix regression in btrfs_page_mkwrite() from vm_fault_t conversion
        btrfs: quota: Set rescan progress to (u64)-1 if we hit last leaf
      d3bc0e67
    • Linus Torvalds's avatar
      Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs · 4a770e63
      Linus Torvalds authored
      Pull vfs fix from Al Viro:
       "Followup to procfs-seq_file series this window"
      
      This fixes a memory leak by making sure that proc seq files release any
      private data on close.  The 'proc_seq_open' has to be properly paired
      with 'proc_seq_release' that releases the extra private data.
      
      * 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
        proc: add proc_seq_release
      4a770e63
    • Linus Torvalds's avatar
      Merge tag 'staging-4.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging · d7563ca5
      Linus Torvalds authored
      Pull staging/IIO fixes from Greg KH:
       "Here are a few small staging and IIO driver fixes for 4.18-rc3.
      
        Nothing major or big, all just fixes for reported problems since
        4.18-rc1. All of these have been in linux-next this week with no
        reported problems"
      
      * tag 'staging-4.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
        staging: android: ion: Return an ERR_PTR in ion_map_kernel
        staging: comedi: quatech_daqp_cs: fix no-op loop daqp_ao_insn_write()
        iio: imu: inv_mpu6050: Fix probe() failure on older ACPI based machines
        iio: buffer: fix the function signature to match implementation
        iio: mma8452: Fix ignoring MMA8452_INT_DRDY
        iio: tsl2x7x/tsl2772: avoid potential division by zero
        iio: pressure: bmp280: fix relative humidity unit
      d7563ca5
    • Linus Torvalds's avatar
      Merge tag 'tty-4.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty · 652788a9
      Linus Torvalds authored
      Pull tty/serial fixes from Greg KH:
       "Here are five fixes for the tty core and some serial drivers.
      
        The tty core ones fix some security and other issues reported by the
        syzbot that I have taken too long in responding to (sorry Tetsuo!).
      
        The 8350 serial driver fix resolves an issue of devices that used to
        work properly stopping working as they shouldn't have been added to a
        blacklist.
      
        All of these have been in linux-next for a few days with no reported
        issues"
      
      * tag 'tty-4.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
        vt: prevent leaking uninitialized data to userspace via /dev/vcs*
        serdev: fix memleak on module unload
        serial: 8250_pci: Remove stalled entries in blacklist
        n_tty: Access echo_* variables carefully.
        n_tty: Fix stall at n_tty_receive_char_special().
      652788a9
    • Linus Torvalds's avatar
      Merge tag 'usb-4.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb · c2aee376
      Linus Torvalds authored
      Pull USB fixes from Greg KH:
       "Here is a number of USB gadget and other driver fixes for 4.18-rc3.
      
        There's a bunch of them here, most of them being gadget driver and
        xhci host controller fixes for reported issues (as normal), but there
        are also some new device ids, and some fixes for the typec code.
      
        There is an acpi core patch in here that was acked by the acpi
        maintainer as it is needed for the typec fixes in order to properly
        solve a problem in that driver.
      
        All of these have been in linux-next this week with no reported
        issues"
      
      * tag 'usb-4.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (33 commits)
        usb: chipidea: host: fix disconnection detect issue
        usb: typec: tcpm: fix logbuffer index is wrong if _tcpm_log is re-entered
        typec: tcpm: Fix a msecs vs jiffies bug
        NFC: pn533: Fix wrong GFP flag usage
        usb: cdc_acm: Add quirk for Uniden UBC125 scanner
        staging/typec: fix tcpci_rt1711h build errors
        usb: typec: ucsi: Fix for incorrect status data issue
        usb: typec: ucsi: acpi: Workaround for cache mode issue
        acpi: Add helper for deactivating memory region
        usb: xhci: increase CRS timeout value
        usb: xhci: tegra: fix runtime PM error handling
        usb: xhci: remove the code build warning
        xhci: Fix kernel oops in trace_xhci_free_virt_device
        xhci: Fix perceived dead host due to runtime suspend race with event handler
        dwc2: gadget: Fix ISOC IN DDMA PID bitfield value calculation
        usb: gadget: dwc2: fix memory leak in gadget_init()
        usb: gadget: composite: fix delayed_status race condition when set_interface
        usb: dwc2: fix isoc split in transfer with no data
        usb: dwc2: alloc dma aligned buffer for isoc split in
        usb: dwc2: fix the incorrect bitmaps for the ports of multi_tt hub
        ...
      c2aee376
    • Linus Torvalds's avatar
      Merge tag 'dma-mapping-4.18-2' of git://git.infradead.org/users/hch/dma-mapping · c350d6d1
      Linus Torvalds authored
      Pull dma mapping fixlet from Christoph Hellwig:
       "Add a missing export required by riscv and unicore"
      
      * tag 'dma-mapping-4.18-2' of git://git.infradead.org/users/hch/dma-mapping:
        swiotlb: export swiotlb_dma_ops
      c350d6d1
  4. 30 Jun, 2018 8 commits
    • Linus Torvalds's avatar
      Merge branch 'parisc-4.18-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux · 883c9ab9
      Linus Torvalds authored
      Pull parisc fixes and cleanups from Helge Deller:
       "Nothing exiting in this patchset, just
      
         - small cleanups of header files
      
         - default to 4 CPUs when building a SMP kernel
      
         - mark 16kB and 64kB page sizes broken
      
         - addition of the new io_pgetevents syscall"
      
      * 'parisc-4.18-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
        parisc: Build kernel without -ffunction-sections
        parisc: Reduce debug output in unwind code
        parisc: Wire up io_pgetevents syscall
        parisc: Default to 4 SMP CPUs
        parisc: Convert printk(KERN_LEVEL) to pr_lvl()
        parisc: Mark 16kB and 64kB page sizes BROKEN
        parisc: Drop struct sigaction from not exported header file
      883c9ab9
    • Linus Torvalds's avatar
      Merge tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc · 08af78d7
      Linus Torvalds authored
      Pull ARM SoC fixes from Olof Johansson:
       "A smaller batch for the end of the week (let's see if I can keep the
        weekly cadence going for once).
      
        All medium-grade fixes here, nothing worrisome:
      
         - Fixes for some fairly old bugs around SD card write-protect
           detection and GPIO interrupt assignments on Davinci.
      
         - Wifi module suspend fix for Hikey.
      
         - Minor DT tweaks to fix inaccuracies for Amlogic platforms, one
           of which solves booting with third-party u-boot"
      
      * tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
        arm64: dts: hikey960: Define wl1837 power capabilities
        arm64: dts: hikey: Define wl1835 power capabilities
        ARM64: dts: meson-gxl: fix Mali GPU compatible string
        ARM64: dts: meson-axg: fix ethernet stability issue
        ARM64: dts: meson-gx: fix ATF reserved memory region
        ARM64: dts: meson-gxl-s905x-p212: Add phy-supply for usb0
        ARM64: dts: meson: fix register ranges for SD/eMMC
        ARM64: dts: meson: disable sd-uhs modes on the libretech-cc
        ARM: dts: da850: Fix interrups property for gpio
        ARM: davinci: board-da850-evm: fix WP pin polarity for MMC/SD
      08af78d7
    • Linus Torvalds's avatar
      Merge tag 'kbuild-fixes-v4.18' of... · 22d3e0c3
      Linus Torvalds authored
      Merge tag 'kbuild-fixes-v4.18' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
      
      Pull Kbuild fixes from Masahiro Yamada:
      
       - introduce __diag_* macros and suppress -Wattribute-alias warnings
         from GCC 8
      
       - fix stack protector test script for x86_64
      
       - fix line number handling in Kconfig
      
       - document that '#' starts a comment in Kconfig
      
       - handle P_SYMBOL property in dump debugging of Kconfig
      
       - correct help message of LD_DEAD_CODE_DATA_ELIMINATION
      
       - fix occasional segmentation faults in Kconfig
      
      * tag 'kbuild-fixes-v4.18' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
        kconfig: loop boundary condition fix
        kbuild: reword help of LD_DEAD_CODE_DATA_ELIMINATION
        kconfig: handle P_SYMBOL in print_symbol()
        kconfig: document Kconfig source file comments
        kconfig: fix line numbers for if-entries in menu tree
        stack-protector: Fix test with 32-bit userland and CONFIG_64BIT=y
        powerpc: Remove -Wattribute-alias pragmas
        disable -Wattribute-alias warning for SYSCALL_DEFINEx()
        kbuild: add macro for controlling warnings to linux/compiler.h
      22d3e0c3
    • Linus Torvalds's avatar
      Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 0fbc4aea
      Linus Torvalds authored
      Pull x86 fixes from Ingo Molnar:
       "The biggest diffstat comes from self-test updates, plus there's entry
        code fixes, 5-level paging related fixes, console debug output fixes,
        and misc fixes"
      
      * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/mm: Clean up the printk()s in show_fault_oops()
        x86/mm: Drop unneeded __always_inline for p4d page table helpers
        x86/efi: Fix efi_call_phys_epilog() with CONFIG_X86_5LEVEL=y
        selftests/x86/sigreturn: Do minor cleanups
        selftests/x86/sigreturn/64: Fix spurious failures on AMD CPUs
        x86/entry/64/compat: Fix "x86/entry/64/compat: Preserve r8-r11 in int $0x80"
        x86/mm: Don't free P4D table when it is folded at runtime
        x86/entry/32: Add explicit 'l' instruction suffix
        x86/mm: Get rid of KERN_CONT in show_fault_oops()
      0fbc4aea
    • Linus Torvalds's avatar
      Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · d7d53886
      Linus Torvalds authored
      Pull perf fixes from Ingo Molnar:
       "Tooling fixes mostly, plus a build warning fix"
      
      * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (21 commits)
        perf/core: Move inline keyword at the beginning of declaration
        tools/headers: Pick up latest kernel ABIs
        perf tools: Fix crash caused by accessing feat_ops[HEADER_LAST_FEATURE]
        perf script: Fix crash because of missing evsel->priv
        perf script: Add missing output fields in a hint
        perf bench: Fix numa report output code
        perf stat: Remove duplicate event counting
        perf alias: Rebuild alias expression string to make it comparable
        perf alias: Remove trailing newline when reading sysfs files
        perf tools: Fix a clang 7.0 compilation error
        tools include uapi: Synchronize bpf.h with the kernel
        tools include uapi: Update if_link.h to pick IFLA_{BRPORT_ISOLATED,VXLAN_TTL_INHERIT}
        tools include powerpc: Update arch/powerpc/include/uapi/asm/unistd.h copy to get 'rseq' syscall
        perf tools: Update x86's syscall_64.tbl, adding 'io_pgetevents' and 'rseq'
        tools headers uapi: Synchronize drm/drm.h
        perf intel-pt: Fix packet decoding of CYC packets
        perf tests: Add valid callback for parse-events test
        perf tests: Add event parsing error handling to parse events test
        perf report powerpc: Fix crash if callchain is empty
        perf test session topology: Fix test on s390
        ...
      d7d53886
    • Linus Torvalds's avatar
      Merge tag 'selinux-pr-20180629' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux · 34a484d5
      Linus Torvalds authored
      Pull selinux fix from Paul Moore:
       "One fairly straightforward patch to fix a longstanding issue where a
        process could stall while accessing files in selinuxfs and block
        everyone else due to a held mutex.
      
        The patch passes all our tests and looks to apply cleanly to your
        current tree"
      
      * tag 'selinux-pr-20180629' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux:
        selinux: move user accesses in selinuxfs out of locked regions
      34a484d5
    • Linus Torvalds's avatar
      Merge tag 'for-linus-20180629' of git://git.kernel.dk/linux-block · e6e5bec4
      Linus Torvalds authored
      Pull block fixes from Jens Axboe:
       "Small set of fixes for this series. Mostly just minor fixes, the only
        oddball in here is the sg change.
      
        The sg change came out of the stall fix for NVMe, where we added a
        mempool and limited us to a single page allocation. CONFIG_SG_DEBUG
        sort-of ruins that, since we'd need to account for that. That's
        actually a generic problem, since lots of drivers need to allocate SG
        lists. So this just removes support for CONFIG_SG_DEBUG, which I added
        back in 2007 and to my knowledge it was never useful.
      
        Anyway, outside of that, this pull contains:
      
         - clone of request with special payload fix (Bart)
      
         - drbd discard handling fix (Bart)
      
         - SATA blk-mq stall fix (me)
      
         - chunk size fix (Keith)
      
         - double free nvme rdma fix (Sagi)"
      
      * tag 'for-linus-20180629' of git://git.kernel.dk/linux-block:
        sg: remove ->sg_magic member
        drbd: Fix drbd_request_prepare() discard handling
        blk-mq: don't queue more if we get a busy return
        block: Fix cloning of requests with a special payload
        nvme-rdma: fix possible double free of controller async event buffer
        block: Fix transfer when chunk sectors exceeds max
      e6e5bec4
    • Linus Torvalds's avatar
      Merge tag 'powerpc-4.18-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux · 1904148a
      Linus Torvalds authored
      Pull powerpc fixes from Michael Ellerman:
       "Two regression fixes, and a new syscall wire-up:
      
         - A fix for the recent conversion to time64_t in the powermac RTC
           routines, which caused time to go backward.
      
         - Another fix for fallout from the split PMD PTL conversion.
      
         - Wire up the new io_pgetevents() syscall.
      
        Thanks to: Aneesh Kumar K.V, Arnd Bergmann, Breno Leitao, Mathieu
        Malaterre"
      
      * tag 'powerpc-4.18-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
        powerpc/powermac: Fix rtc read/write functions
        powerpc/mm/32: Fix pgtable_page_dtor call
        powerpc: Wire up io_pgetevents
      1904148a
  5. 29 Jun, 2018 20 commits