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  1. Sep 30, 2019
  2. Aug 22, 2019
    • Guo Ren's avatar
      csky: Fixup 610 vipt cache flush mechanism · 4ad35c1f
      Guo Ren authored
      
      
      610 has vipt aliasing issue, so we need to finish the cache flush
      apis mentioned in cachetlb.rst to avoid data corruption.
      
      Here is the list of modified apis in the patch:
      
       - flush_kernel_dcache_page      (new add)
       - flush_dcache_mmap_lock        (new add)
       - flush_dcache_mmap_unlock      (new add)
       - flush_kernel_vmap_range       (new add)
       - invalidate_kernel_vmap_range  (new add)
       - flush_anon_page               (new add)
       - flush_cache_range             (new add)
       - flush_cache_vmap              (flush all)
       - flush_cache_vunmap            (flush all)
       - flush_cache_mm                (only dcache flush)
       - flush_icache_page             (just nop)
       - copy_from_user_page           (remove no need flush)
       - copy_to_user_page             (remove no need flush)
      
      Change to V2:
       - Fixup compile error with xa_lock*(&mapping->i_pages)
      
      Signed-off-by: default avatarGuo Ren <ren_guo@c-sky.com>
      Cc: Arnd Bergmann <arnd@arndb.de>
      Cc: Christoph Hellwig <hch@infradead.org>
      4ad35c1f
  3. Aug 20, 2019
    • Guo Ren's avatar
      csky: Support kernel non-aligned access · c7e6f0e9
      Guo Ren authored
      
      
      We prohibit non-aligned access in kernel mode, but some special NIC
      driver needs to support kernel-state unaligned access. For example,
      when the bus does not support unaligned access, IP header parsing
      will cause non-aligned access and driver does not recopy the skb
      buffer to dma for performance reasons.
      
      Added kernel_enable & user_enable to control unaligned access and
      added kernel_count  & user_count for statistical unaligned access.
      
      Signed-off-by: default avatarGuo Ren <ren_guo@c-sky.com>
      Cc: Arnd Bergmann <arnd@arndb.de>
      c7e6f0e9
    • Guo Ren's avatar
      csky: Fixup defer cache flush for 610 · dc140045
      Guo Ren authored
      
      
      We use defer cache flush mechanism to improve the performance of
      610, but the implementation is wrong. We fix it up now and update
      the mechanism:
      
       - Zero page needn't be flushed.
       - If page is file mapping & non-touched in user space, defer flush.
       - If page is anon mapping or dirty file mapping, flush immediately.
       - In update_mmu_cache finish the defer flush by flush_dcache_page().
      
      For 610 we need take care the dcache aliasing issue:
       - VIPT cache with 8K-bytes size per way in 4K page granularity.
      
      Signed-off-by: default avatarGuo Ren <ren_guo@c-sky.com>
      Cc: Arnd Bergmann <arnd@arndb.de>
      dc140045
    • Guo Ren's avatar
      csky: Fixup arch_get_unmapped_area() implementation · be819aa6
      Guo Ren authored
      
      
      Current arch_get_unmapped_area() of abiv1 doesn't use standard kernel
      api. After referring to the implementation of arch/arm, we implement
      it with vm_unmapped_area() from linux/mm.h.
      
      Signed-off-by: default avatarGuo Ren <ren_guo@c-sky.com>
      Cc: Arnd Bergmann <arnd@arndb.de>
      be819aa6
  4. Aug 15, 2019
    • Guo Ren's avatar
      csky: Fixup ioremap function losing · 5336c179
      Guo Ren authored
      
      
      Implement the following apis to meet usage in different scenarios.
      
       - ioremap          (NonCache + StrongOrder)
       - ioremap_nocache  (NonCache + StrongOrder)
       - ioremap_wc       (NonCache + WeakOrder  )
       - ioremap_cache    (   Cache + WeakOrder  )
      
      Also change flag VM_ALLOC to VM_IOREMAP in get_vm_area_caller.
      
      Signed-off-by: default avatarGuo Ren <ren_guo@c-sky.com>
      Cc: Arnd Bergmann <arnd@arndb.de>
      Cc: Christoph Hellwig <hch@infradead.org>
      5336c179
  5. Aug 06, 2019
    • Guo Ren's avatar
      csky: Optimize arch_sync_dma_for_cpu/device with dma_inv_range · ae76f635
      Guo Ren authored
      
      
      DMA_FROM_DEVICE only need to read dma data of memory into CPU cache,
      so there is no need to clear cache before. Also clear + inv for
      DMA_FROM_DEVICE won't cause problem, because the memory range for dma
      won't be touched by software during dma working.
      
      Changes for V2:
       - Remove clr cache and ignore the DMA_TO_DEVICE in _for_cpu.
       - Change inv to wbinv cache with DMA_FROM_DEVICE in _for_device.
      
      Signed-off-by: default avatarGuo Ren <ren_guo@c-sky.com>
      Cc: Arnd Bergmann <arnd@arndb.de>
      ae76f635
    • Guo Ren's avatar
      csky/dma: Fixup cache_op failed when cross memory ZONEs · 4af9027d
      Guo Ren authored
      
      
      If the paddr and size are cross between NORMAL_ZONE and HIGHMEM_ZONE
      memory range, cache_op will panic in do_page_fault with bad_area.
      
      Optimize the code to support the range which cross memory ZONEs.
      
      Changes for V2:
       - Revert back to postcore_initcall
      
      Signed-off-by: default avatarGuo Ren <ren_guo@c-sky.com>
      Cc: Christoph Hellwig <hch@infradead.org>
      Cc: Arnd Bergmann <arnd@arndb.de>
      4af9027d
  6. Jul 31, 2019
    • Guo Ren's avatar
      csky: Fixup dma_alloc_coherent with PAGE_SO attribute · 7f80fe20
      Guo Ren authored
      This bug is from commit: 2b070ccd
      
       (fixup abiv2 mmap(... O_SYNC)
      failed). In that patch we remove the _PAGE_SO for memory noncache
      mapping and this will cause problem when drivers use dma descriptors
      to control the transcations without dma_w/rmb().
      
      After referencing other archs' implementation, pgprot_writecombine is
      introduced for mmap(... O_SYNC).
      
      Signed-off-by: default avatarGuo Ren <ren_guo@c-sky.com>
      7f80fe20
    • Guo Ren's avatar
      csky: Fixup mb() synchronization problem · 81b23ba6
      Guo Ren authored
      
      
      The mb() is the superset of dma and smp. Using bar.xxx to implement
      mb() will cause problem when sync data with dma device, becasue
      bar.xxx couldn't guarantee bus transactions finished at outside bus
      level.
      
      We must use sync.s instead of bar.xxx for dma data synchronization
      and it will guarantee retirement after getting the bus bresponse.
      
      Changes for V2:
       - Use sync.s for all mb, rmb, wmb, dma_wmb, dma_rmb.
      
      Signed-off-by: default avatarGuo Ren <ren_guo@c-sky.com>
      Cc: Arnd Bergmann <arnd@arndb.de>
      81b23ba6
  7. Jul 29, 2019
    • Linus Torvalds's avatar
      Linux 5.3-rc2 · 609488bc
      Linus Torvalds authored
      609488bc
    • Linus Torvalds's avatar
      Merge tag 'meminit-v5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux · c622fc5f
      Linus Torvalds authored
      Pull structleak fix from Kees Cook:
       "Disable gcc-based stack variable auto-init under KASAN (Arnd
        Bergmann).
      
        This fixes a bunch of build warnings under KASAN and the
        gcc-plugin-based stack auto-initialization features (which are
        arguably redundant, so better to let KASAN control this)"
      
      * tag 'meminit-v5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
        structleak: disable STRUCTLEAK_BYREF in combination with KASAN_STACK
      c622fc5f
    • Linus Torvalds's avatar
      Merge tag 'kbuild-fixes-v5.3' of... · 8e61ea11
      Linus Torvalds authored
      Merge tag 'kbuild-fixes-v5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
      
      Pull Kbuild fixes from Masahiro Yamada:
      
       - add compile_commands.json to .gitignore
      
       - fix false-positive warning from gen_compile_commands.py after
         allnoconfig build
      
       - remove unused code
      
      * tag 'kbuild-fixes-v5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
        kbuild: remove unused single-used-m
        gen_compile_commands: lower the entry count threshold
        .gitignore: Add compilation database file
        kbuild: remove unused objectify macro
      8e61ea11
    • Linus Torvalds's avatar
      Merge tag 'char-misc-5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc · 04ce9318
      Linus Torvalds authored
      Pull char/misc driver fixes from Greg KH:
       "Here are some small char and misc driver fixes for 5.3-rc2 to resolve
        some reported issues.
      
        Nothing major at all, some binder bugfixes for issues found, some new
        mei device ids, firmware building warning fixes, habanalabs fixes, a
        few other build fixes, and a MAINTAINERS update.
      
        All of these have been in linux-next with no reported issues"
      
      * tag 'char-misc-5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
        test_firmware: fix a memory leak bug
        hpet: Fix division by zero in hpet_time_div()
        eeprom: make older eeprom drivers select NVMEM_SYSFS
        vmw_balloon: Remove Julien from the maintainers list
        fpga-manager: altera-ps-spi: Fix build error
        mei: me: add mule creek canyon (EHL) device ids
        binder: prevent transactions to context manager from its own process.
        binder: Set end of SG buffer area properly.
        firmware: Fix missing inline
        firmware: fix build errors in paged buffer handling code
        habanalabs: don't reset device when getting VRHOT
        habanalabs: use %pad for printing a dma_addr_t
      04ce9318
    • Linus Torvalds's avatar
      Merge tag 'tty-5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty · 572782b2
      Linus Torvalds authored
      Pull tty fixes from Greg KH:
       "Here are two tty/vt fixes:
      
         - delete the netx-serial driver as the arch has been removed, no need
           to keep the serial driver for it around either.
      
         - vt console_lock fix to resolve a reported noisy warning at runtime
      
        Both of these have been in linux-next with no reported issues"
      
      * tag 'tty-5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
        vt: Grab console_lock around con_is_bound in show_bind
        tty: serial: netx: Delete driver
      572782b2
    • Linus Torvalds's avatar
      Merge tag 'spdx-5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/spdx · ad28fd1c
      Linus Torvalds authored
      Pull SPDX fixes from Greg KH:
       "Here are some small SPDX fixes for 5.3-rc2 for things that came in
        during the 5.3-rc1 merge window that we previously missed.
      
        Only three small patches here:
      
         - two uapi patches to resolve some SPDX tags that were not correct
      
         - fix an invalid SPDX tag in the iomap Makefile file
      
        All have been properly reviewed on the public mailing lists"
      
      * tag 'spdx-5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/spdx:
        iomap: fix Invalid License ID
        treewide: remove SPDX "WITH Linux-syscall-note" from kernel-space headers again
        treewide: add "WITH Linux-syscall-note" to SPDX tag of uapi headers
      ad28fd1c
    • Linus Torvalds's avatar
      Merge tag 'usb-5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb · 29af915c
      Linus Torvalds authored
      Pull USB fixes from Greg KH:
       "Here are some small fixes for 5.3-rc2. All of these resolve some
        reported issues, some more than others :)
      
        Included in here is:
      
         - xhci fix for an annoying issue with odd devices
      
         - reversion of some usb251xb patches that should not have been merged
      
         - usb pci quirk additions and fixups
      
         - usb storage fix
      
         - usb host controller error test fix
      
        All of these have been in linux-next with no reported issues"
      
      * tag 'usb-5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
        xhci: Fix crash if scatter gather is used with Immediate Data Transfer (IDT).
        usb: usb251xb: Reallow swap-dx-lanes to apply to the upstream port
        Revert "usb: usb251xb: Add US port lanes inversion property"
        Revert "usb: usb251xb: Add US lanes inversion dts-bindings"
        usb: wusbcore: fix unbalanced get/put cluster_id
        usb/hcd: Fix a NULL vs IS_ERR() bug in usb_hcd_setup_local_mem()
        usb-storage: Add a limitation for blk_queue_max_hw_sectors()
        usb: pci-quirks: Minor cleanup for AMD PLL quirk
        usb: pci-quirks: Correct AMD PLL quirk detection
      29af915c
    • Linus Torvalds's avatar
      Merge tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc · 5bb575bc
      Linus Torvalds authored
      Pull ARM SoC fixes from Olof Johansson:
       "Here's the first batch of fixes for this release cycle.
      
        Main diffstat here is the re-deletion of netx. I messed up and most
        likely didn't remove the files from the index when I test-merged this
        and saw conflicts, and from there on out 'git rerere' remembered the
        mistake and I missed checking it. Here it's done again as expected.
      
        Besides that:
      
         - A defconfig refresh + enabling of new drivers for u8500
      
         - i.MX fixlets for i2c/SAI/pinmux
      
         - sleep.S build fix for Davinci
      
         - Broadcom devicetree build/warning fix"
      
      * tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc:
        ARM: defconfig: u8500: Add new drivers
        ARM: defconfig: u8500: Refresh defconfig
        ARM: dts: bcm: bcm47094: add missing #cells for mdio-bus-mux
        ARM: davinci: fix sleep.S build error on ARMv4
        arm64: dts: imx8mq: fix SAI compatible
        arm64: dts: imx8mm: Correct SAI3 RXC/TXFS pin's mux option #1
        ARM: dts: imx6ul: fix clock frequency property name of I2C buses
        ARM: Delete netx a second time
        ARM: dts: imx7ulp: Fix usb-phy unit address format
      5bb575bc
  8. Jul 28, 2019
    • Linus Torvalds's avatar
      Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · a9815a4f
      Linus Torvalds authored
      Pull x86 fixes from Thomas Gleixner:
       "A set of x86 fixes and functional updates:
      
         - Prevent stale huge I/O TLB mappings on 32bit. A long standing bug
           which got exposed by KPTI support for 32bit
      
         - Prevent bogus access_ok() warnings in arch_stack_walk_user()
      
         - Add display quirks for Lenovo devices which have height and width
           swapped
      
         - Add the missing CR2 fixup for 32 bit async pagefaults. Fallout of
           the CR2 bug fix series.
      
         - Unbreak handling of force enabled HPET by moving the 'is HPET
           counting' check back to the original place.
      
         - A more accurate check for running on a hypervisor platform in the
           MDS mitigation code. Not perfect, but more accurate than the
           previous one.
      
         - Update a stale and confusing comment vs. IRQ stacks"
      
      * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/speculation/mds: Apply more accurate check on hypervisor platform
        x86/hpet: Undo the early counter is counting check
        x86/entry/32: Pass cr2 to do_async_page_fault()
        x86/irq/64: Update stale comment
        x86/sysfb_efi: Add quirks for some devices with swapped width and height
        x86/stacktrace: Prevent access_ok() warnings in arch_stack_walk_user()
        mm/vmalloc: Sync unmappings in __purge_vmap_area_lazy()
        x86/mm: Sync also unmappings in vmalloc_sync_all()
        x86/mm: Check for pfn instead of page in vmalloc_sync_one()
      a9815a4f
    • Linus Torvalds's avatar
      Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · e24ce84e
      Linus Torvalds authored
      Pull scheduler fixes from Thomas Gleixner:
       "Two fixes for the fair scheduling class:
      
         - Prevent freeing memory which is accessible by concurrent readers
      
         - Make the RCU annotations for numa groups consistent"
      
      * 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        sched/fair: Use RCU accessors consistently for ->numa_group
        sched/fair: Don't free p->numa_faults with concurrent readers
      e24ce84e
    • Linus Torvalds's avatar
      Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 750991f9
      Linus Torvalds authored
      Pull perf fixes from Thomas Gleixner:
       "A pile of perf related fixes:
      
        Kernel:
         - Fix SLOTS PEBS event constraints for Icelake CPUs
      
         - Add the missing mask bit to allow counting hardware generated
           prefetches on L3 for Icelake CPUs
      
         - Make the test for hypervisor platforms more accurate (as far as
           possible)
      
         - Handle PMUs correctly which override event->cpu
      
         - Yet another missing fallthrough annotation
      
        Tools:
           perf.data:
              - Fix loading of compressed data split across adjacent records
              - Fix buffer size setting for processing CPU topology perf.data
                header.
      
           perf stat:
              - Fix segfault for event group in repeat mode
              - Always separate "stalled cycles per insn" line, it was being
                appended to the "instructions" line.
      
           perf script:
              - Fix --max-blocks man page description.
              - Improve man page description of metrics.
              - Fix off by one in brstackinsn IPC computation.
      
           perf probe:
              - Avoid calling freeing routine multiple times for same pointer.
      
           perf build:
              - Do not use -Wshadow on gcc < 4.8, avoiding too strict warnings
                treated as errors, breaking the build"
      
      * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        perf/x86/intel: Mark expected switch fall-throughs
        perf/core: Fix creating kernel counters for PMUs that override event->cpu
        perf/x86: Apply more accurate check on hypervisor platform
        perf/x86/intel: Fix invalid Bit 13 for Icelake MSR_OFFCORE_RSP_x register
        perf/x86/intel: Fix SLOTS PEBS event constraint
        perf build: Do not use -Wshadow on gcc < 4.8
        perf probe: Avoid calling freeing routine multiple times for same pointer
        perf probe: Set pev->nargs to zero after freeing pev->args entries
        perf session: Fix loading of compressed data split across adjacent records
        perf stat: Always separate stalled cycles per insn
        perf stat: Fix segfault for event group in repeat mode
        perf tools: Fix proper buffer size for feature processing
        perf script: Fix off by one in brstackinsn IPC computation
        perf script: Improve man page description of metrics
        perf script: Fix --max-blocks man page description
      750991f9
    • Linus Torvalds's avatar
      Merge branch 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 431f288e
      Linus Torvalds authored
      Pull locking fixes from Thomas Gleixner:
       "A set of locking fixes:
      
         - Address the fallout of the rwsem rework. Missing ACQUIREs and a
           sanity check to prevent a use-after-free
      
         - Add missing checks for unitialized mutexes when mutex debugging is
           enabled.
      
         - Remove the bogus code in the generic SMP variant of
           arch_futex_atomic_op_inuser()
      
         - Fixup the #ifdeffery in lockdep to prevent compile warnings"
      
      * 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        locking/mutex: Test for initialized mutex
        locking/lockdep: Clean up #ifdef checks
        locking/lockdep: Hide unused 'class' variable
        locking/rwsem: Add ACQUIRE comments
        tty/ldsem, locking/rwsem: Add missing ACQUIRE to read_failed sleep loop
        lcoking/rwsem: Add missing ACQUIRE to read_slowpath sleep loop
        locking/rwsem: Add missing ACQUIRE to read_slowpath exit when queue is empty
        locking/rwsem: Don't call owner_on_cpu() on read-owner
        futex: Cleanup generic SMP variant of arch_futex_atomic_op_inuser()
      431f288e
    • Linus Torvalds's avatar
      Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 13fbe991
      Linus Torvalds authored
      Pull objtool fix from Thomas Gleixner:
       "A single robustness fix for objtool to handle unbalanced CLAC
        invocations under all circumstances"
      
      * 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        objtool: Improve UACCESS coverage
      13fbe991
    • Linus Torvalds's avatar
      Merge tag 'Wimplicit-fallthrough-5.3-rc2' of... · 88c50834
      Linus Torvalds authored
      Merge tag 'Wimplicit-fallthrough-5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux
      
      Pull Wimplicit-fallthrough enablement from Gustavo A. R. Silva:
       "This marks switch cases where we are expecting to fall through, and
        globally enables the -Wimplicit-fallthrough option in the main
        Makefile.
      
        Finally, some missing-break fixes that have been tagged for -stable:
      
         - drm/amdkfd: Fix missing break in switch statement
      
         - drm/amdgpu/gfx10: Fix missing break in switch statement
      
        With these changes, we completely get rid of all the fall-through
        warnings in the kernel"
      
      * tag 'Wimplicit-fallthrough-5.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux:
        Makefile: Globally enable fall-through warning
        drm/i915: Mark expected switch fall-throughs
        drm/amd/display: Mark expected switch fall-throughs
        drm/amdkfd/kfd_mqd_manager_v10: Avoid fall-through warning
        drm/amdgpu/gfx10: Fix missing break in switch statement
        drm/amdkfd: Fix missing break in switch statement
        perf/x86/intel: Mark expected switch fall-throughs
        mtd: onenand_base: Mark expected switch fall-through
        afs: fsclient: Mark expected switch fall-throughs
        afs: yfsclient: Mark expected switch fall-throughs
        can: mark expected switch fall-throughs
        firewire: mark expected switch fall-throughs
      88c50834
  9. Jul 27, 2019