1. 26 Nov, 2019 8 commits
    • Linus Torvalds's avatar
      Merge tag 'edac_for_5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras · 9c91e6a5
      Linus Torvalds authored
      Pull EDAC updates from Borislav Petkov:
       "A lot of changes this time around, details below.
      
        From the next cycle onwards, we'll switch the EDAC tree to topic
        branches (instead of a single edac-for-next branch) which should make
        the changes handling more flexible, hopefully. We'll see.
      
        Summary:
      
         - Rework error logging functions to accept a count of errors
           parameter (Hanna Hawa)
      
         - Part one of substantial EDAC core + ghes_edac driver cleanup
           (Robert Richter)
      
         - Print additional useful logging information in skx_* (Tony Luck)
      
         - Improve amd64_edac hw detection + cleanups (Yazen Ghannam)
      
         - Misc cleanups, fixes and code improvements"
      
      * tag 'edac_for_5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras: (35 commits)
        EDAC/altera: Use the Altera System Manager driver
        EDAC/altera: Cleanup the ECC Manager
        EDAC/altera: Use fast register IO for S10 IRQs
        EDAC/ghes: Do not warn when incrementing refcount on 0
        EDAC/Documentation: Describe CPER module definition and DIMM ranks
        EDAC: Unify the mc_event tracepoint call
        EDAC/ghes: Remove intermediate buffer pvt->detail_location
        EDAC/ghes: Fix grain calculation
        EDAC/ghes: Use standard kernel macros for page calculations
        EDAC: Remove misleading comment in struct edac_raw_error_desc
        EDAC/mc: Reduce indentation level in edac_mc_handle_error()
        EDAC/mc: Remove needless zero string termination
        EDAC/mc: Do not BUG_ON() in edac_mc_alloc()
        EDAC: Introduce an mci_for_each_dimm() iterator
        EDAC: Remove EDAC_DIMM_OFF() macro
        EDAC: Replace EDAC_DIMM_PTR() macro with edac_get_dimm() function
        EDAC/amd64: Get rid of the ECC disabled long message
        EDAC/ghes: Fix locking and memory barrier issues
        EDAC/amd64: Check for memory before fully initializing an instance
        EDAC/amd64: Use cached data when checking for ECC
        ...
      9c91e6a5
    • Linus Torvalds's avatar
      Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm · 752272f1
      Linus Torvalds authored
      Pull KVM updates from Paolo Bonzini:
       "ARM:
         - data abort report and injection
         - steal time support
         - GICv4 performance improvements
         - vgic ITS emulation fixes
         - simplify FWB handling
         - enable halt polling counters
         - make the emulated timer PREEMPT_RT compliant
      
        s390:
         - small fixes and cleanups
         - selftest improvements
         - yield improvements
      
        PPC:
         - add capability to tell userspace whether we can single-step the
           guest
         - improve the allocation of XIVE virtual processor IDs
         - rewrite interrupt synthesis code to deliver interrupts in virtual
           mode when appropriate.
         - minor cleanups and improvements.
      
        x86:
         - XSAVES support for AMD
         - more accurate report of nested guest TSC to the nested hypervisor
         - retpoline optimizations
         - support for nested 5-level page tables
         - PMU virtualization optimizations, and improved support for nested
           PMU virtualization
         - correct latching of INITs for nested virtualization
         - IOAPIC optimization
         - TSX_CTRL virtualization for more TAA happiness
         - improved allocation and flushing of SEV ASIDs
         - many bugfixes and cleanups"
      
      * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (127 commits)
        kvm: nVMX: Relax guest IA32_FEATURE_CONTROL constraints
        KVM: x86: Grab KVM's srcu lock when setting nested state
        KVM: x86: Open code shared_msr_update() in its only caller
        KVM: Fix jump label out_free_* in kvm_init()
        KVM: x86: Remove a spurious export of a static function
        KVM: x86: create mmu/ subdirectory
        KVM: nVMX: Remove unnecessary TLB flushes on L1<->L2 switches when L1 use apic-access-page
        KVM: x86: remove set but not used variable 'called'
        KVM: nVMX: Do not mark vmcs02->apic_access_page as dirty when unpinning
        KVM: vmx: use MSR_IA32_TSX_CTRL to hard-disable TSX on guest that lack it
        KVM: vmx: implement MSR_IA32_TSX_CTRL disable RTM functionality
        KVM: x86: implement MSR_IA32_TSX_CTRL effect on CPUID
        KVM: x86: do not modify masked bits of shared MSRs
        KVM: x86: fix presentation of TSX feature in ARCH_CAPABILITIES
        KVM: PPC: Book3S HV: XIVE: Fix potential page leak on error path
        KVM: PPC: Book3S HV: XIVE: Free previous EQ page when setting up a new one
        KVM: nVMX: Assume TLB entries of L1 and L2 are tagged differently if L0 use EPT
        KVM: x86: Unexport kvm_vcpu_reload_apic_access_page()
        KVM: nVMX: add CR4_LA57 bit to nested CR4_FIXED1
        KVM: nVMX: Use semi-colon instead of comma for exit-handlers initialization
        ...
      752272f1
    • Linus Torvalds's avatar
      Merge tag 'for-linus-5.5a-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip · 3f3c8be9
      Linus Torvalds authored
      Pull xen updates from Juergen Gross:
      
       - a small series to remove the build constraint of Xen x86 MCE handling
         to 64-bit only
      
       - a bunch of minor cleanups
      
      * tag 'for-linus-5.5a-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
        xen: Fix Kconfig indentation
        xen/mcelog: also allow building for 32-bit kernels
        xen/mcelog: add PPIN to record when available
        xen/mcelog: drop __MC_MSR_MCGCAP
        xen/gntdev: Use select for DMA_SHARED_BUFFER
        xen: mm: make xen_mm_init static
        xen: mm: include <xen/xen-ops.h> for missing declarations
      3f3c8be9
    • Linus Torvalds's avatar
      Merge tag 'mips_5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux · 2981dcf3
      Linus Torvalds authored
      Pull MIPS updates from Paul Burton:
       "The main MIPS changes for 5.5:
      
         - Atomics-related code sees some rework & cleanup, most notably
           allowing Loongson LL/SC errata workarounds to be more bulletproof &
           their correctness to be checked at build time.
      
         - Command line setup code is simplified somewhat, resolving various
           corner cases.
      
         - MIPS kernels can now be built with kcov code coverage support.
      
         - We can now build with CONFIG_FORTIFY_SOURCE=y.
      
         - Miscellaneous cleanups.
      
        And some platform specific changes:
      
         - We now disable some broken TLB functionality on certain Ingenic
           systems, and JZ4780 systems gain some devicetree nodes to support
           more devices.
      
         - Loongson support sees a number of cleanups, and we gain initial
           support for Loongson 3A R4 systems.
      
         - We gain support for MediaTek MT7688-based GARDENA Smart Gateway
           systems.
      
         - SGI IP27 (Origin 2*) see a number of fixes, cleanups &
           simplifications.
      
         - SGI IP30 (Octane) systems are now supported"
      
      * tag 'mips_5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux: (107 commits)
        MIPS: SGI-IP27: Enable ethernet phy on second Origin 200 module
        MIPS: PCI: Fix fake subdevice ID for IOC3
        MIPS: Ingenic: Disable abandoned HPTLB function.
        MIPS: PCI: remember nasid changed by set interrupt affinity
        MIPS: SGI-IP27: Fix crash, when CPUs are disabled via nr_cpus parameter
        mips: add support for folded p4d page tables
        mips: drop __pXd_offset() macros that duplicate pXd_index() ones
        mips: fix build when "48 bits virtual memory" is enabled
        MIPS: math-emu: Reuse name array in debugfs_fpuemu()
        MIPS: allow building with kcov coverage
        MIPS: Loongson64: Drop setup_pcimap
        MIPS: Loongson2ef: Convert to early_printk_8250
        MIPS: Drop CPU_SUPPORTS_UNCACHED_ACCELERATED
        MIPS: Loongson{2ef, 32, 64} convert to generic fw cmdline
        MIPS: Drop pmon.h
        MIPS: Loongson: Unify LOONGSON3/LOONGSON64 Kconfig usage
        MIPS: Loongson: Rename LOONGSON1 to LOONGSON32
        MIPS: Loongson: Fix return value of loongson_hwmon_init
        MIPS: add support for SGI Octane (IP30)
        MIPS: PCI: make phys_to_dma/dma_to_phys for pci-xtalk-bridge common
        ...
      2981dcf3
    • Linus Torvalds's avatar
      Merge tag 'm68k-for-v5.5-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k · 5ef30d74
      Linus Torvalds authored
      Pull m68k updates from Geert Uytterhoeven:
      
       - Atari Falcon IDE platform driver conversion for module autoload
      
       - defconfig updates (including enablement of Amiga ICY I2C)
      
       - small fixes and cleanups
      
      * tag 'm68k-for-v5.5-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k:
        m68k/atari: Convert Falcon IDE drivers to platform drivers
        m68k: defconfig: Enable ICY I2C and LTC2990 on Amiga
        m68k: defconfig: Update defconfigs for v5.4-rc1
        m68k: q40: Fix info-leak in rtc_ioctl
        nubus: Remove cast to void pointer
      5ef30d74
    • Linus Torvalds's avatar
      Merge branch 'ras-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 28fcb77b
      Linus Torvalds authored
      Pull RAS updates from Borislav Petkov:
      
       - Fully reworked thermal throttling notifications, there should be no
         more spamming of dmesg (Srinivas Pandruvada and Benjamin Berg)
      
       - More enablement for the Intel-compatible CPUs Zhaoxin (Tony W
         Wang-oc)
      
       - PPIN support for Icelake (Tony Luck)
      
      * 'ras-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/mce/therm_throt: Optimize notifications of thermal throttle
        x86/mce: Add Xeon Icelake to list of CPUs that support PPIN
        x86/mce: Lower throttling MCE messages' priority to warning
        x86/mce: Add Zhaoxin LMCE support
        x86/mce: Add Zhaoxin CMCI support
        x86/mce: Add Zhaoxin MCE support
        x86/mce/amd: Make disable_err_thresholding() static
      28fcb77b
    • Linus Torvalds's avatar
      Merge branch 'x86-microcode-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 63c2291f
      Linus Torvalds authored
      Pull x86 microcode updates from Borislav Petkov:
       "This converts the late loading method to load the microcode in
        parallel (vs sequentially currently). The patch remained in linux-next
        for the maximum amount of time so that any potential and hard to debug
        fallout be minimized.
      
        Now cloud folks have their milliseconds back but all the normal people
        should use early loading anyway :-)"
      
      * 'x86-microcode-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/microcode/intel: Issue the revision updated message only on the BSP
        x86/microcode: Update late microcode in parallel
        x86/microcode/amd: Fix two -Wunused-but-set-variable warnings
      63c2291f
    • Linus Torvalds's avatar
      Merge tag 's390-5.5-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux · ea1f56fa
      Linus Torvalds authored
      Pull s390 updates from Vasily Gorbik:
      
       - Adjust PMU device drivers registration to avoid WARN_ON and few other
         perf improvements.
      
       - Enhance tracing in vfio-ccw.
      
       - Few stack unwinder fixes and improvements, convert get_wchan custom
         stack unwinding to generic api usage.
      
       - Fixes for mm helpers issues uncovered with tests validating
         architecture page table helpers.
      
       - Fix noexec bit handling when hardware doesn't support it.
      
       - Fix memleak and unsigned value compared with zero bugs in crypto
         code. Minor code simplification.
      
       - Fix crash during kdump with kasan enabled kernel.
      
       - Switch bug and alternatives from asm to asm_inline to improve
         inlining decisions.
      
       - Use 'depends on cc-option' for MARCH and TUNE options in Kconfig, add
         z13s and z14 ZR1 to TUNE descriptions.
      
       - Minor head64.S simplification.
      
       - Fix physical to logical CPU map for SMT.
      
       - Several cleanups in qdio code.
      
       - Other minor cleanups and fixes all over the code.
      
      * tag 's390-5.5-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (41 commits)
        s390/cpumf: Adjust registration of s390 PMU device drivers
        s390/smp: fix physical to logical CPU map for SMT
        s390/early: move access registers setup in C code
        s390/head64: remove unnecessary vdso_per_cpu_data setup
        s390/early: move control registers setup in C code
        s390/kasan: support memcpy_real with TRACE_IRQFLAGS
        s390/crypto: Fix unsigned variable compared with zero
        s390/pkey: use memdup_user() to simplify code
        s390/pkey: fix memory leak within _copy_apqns_from_user()
        s390/disassembler: don't hide instruction addresses
        s390/cpum_sf: Assign error value to err variable
        s390/cpum_sf: Replace function name in debug statements
        s390/cpum_sf: Use consistant debug print format for sampling
        s390/unwind: drop unnecessary code around calling ftrace_graph_ret_addr()
        s390: add error handling to perf_callchain_kernel
        s390: always inline current_stack_pointer()
        s390/mm: add mm_pxd_folded() checks to pxd_free()
        s390/mm: properly clear _PAGE_NOEXEC bit when it is not supported
        s390/mm: simplify page table helpers for large entries
        s390/mm: make pmd/pud_bad() report large entries as bad
        ...
      ea1f56fa
  2. 25 Nov, 2019 21 commits
    • Linus Torvalds's avatar
      Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux · 4ba380f6
      Linus Torvalds authored
      Pull arm64 updates from Catalin Marinas:
       "Apart from the arm64-specific bits (core arch and perf, new arm64
        selftests), it touches the generic cow_user_page() (reviewed by
        Kirill) together with a macro for x86 to preserve the existing
        behaviour on this architecture.
      
        Summary:
      
         - On ARMv8 CPUs without hardware updates of the access flag, avoid
           failing cow_user_page() on PFN mappings if the pte is old. The
           patches introduce an arch_faults_on_old_pte() macro, defined as
           false on x86. When true, cow_user_page() makes the pte young before
           attempting __copy_from_user_inatomic().
      
         - Covert the synchronous exception handling paths in
           arch/arm64/kernel/entry.S to C.
      
         - FTRACE_WITH_REGS support for arm64.
      
         - ZONE_DMA re-introduced on arm64 to support Raspberry Pi 4
      
         - Several kselftest cases specific to arm64, together with a
           MAINTAINERS update for these files (moved to the ARM64 PORT entry).
      
         - Workaround for a Neoverse-N1 erratum where the CPU may fetch stale
           instructions under certain conditions.
      
         - Workaround for Cortex-A57 and A72 errata where the CPU may
           speculatively execute an AT instruction and associate a VMID with
           the wrong guest page tables (corrupting the TLB).
      
         - Perf updates for arm64: additional PMU topologies on HiSilicon
           platforms, support for CCN-512 interconnect, AXI ID filtering in
           the IMX8 DDR PMU, support for the CCPI2 uncore PMU in ThunderX2.
      
         - GICv3 optimisation to avoid a heavy barrier when accessing the
           ICC_PMR_EL1 register.
      
         - ELF HWCAP documentation updates and clean-up.
      
         - SMC calling convention conduit code clean-up.
      
         - KASLR diagnostics printed during boot
      
         - NVIDIA Carmel CPU added to the KPTI whitelist
      
         - Some arm64 mm clean-ups: use generic free_initrd_mem(), remove
           stale macro, simplify calculation in __create_pgd_mapping(), typos.
      
         - Kconfig clean-ups: CMDLINE_FORCE to depend on CMDLINE, choice for
           endinanness to help with allmodconfig"
      
      * tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (93 commits)
        arm64: Kconfig: add a choice for endianness
        kselftest: arm64: fix spelling mistake "contiguos" -> "contiguous"
        arm64: Kconfig: make CMDLINE_FORCE depend on CMDLINE
        MAINTAINERS: Add arm64 selftests to the ARM64 PORT entry
        arm64: kaslr: Check command line before looking for a seed
        arm64: kaslr: Announce KASLR status on boot
        kselftest: arm64: fake_sigreturn_misaligned_sp
        kselftest: arm64: fake_sigreturn_bad_size
        kselftest: arm64: fake_sigreturn_duplicated_fpsimd
        kselftest: arm64: fake_sigreturn_missing_fpsimd
        kselftest: arm64: fake_sigreturn_bad_size_for_magic0
        kselftest: arm64: fake_sigreturn_bad_magic
        kselftest: arm64: add helper get_current_context
        kselftest: arm64: extend test_init functionalities
        kselftest: arm64: mangle_pstate_invalid_mode_el[123][ht]
        kselftest: arm64: mangle_pstate_invalid_daif_bits
        kselftest: arm64: mangle_pstate_invalid_compat_toggle and common utils
        kselftest: arm64: extend toplevel skeleton Makefile
        drivers/perf: hisi: update the sccl_id/ccl_id for certain HiSilicon platform
        arm64: mm: reserve CMA and crashkernel in ZONE_DMA32
        ...
      4ba380f6
    • Linus Torvalds's avatar
      Merge tag 'linux-kselftest-5.5-rc1-kunit' of... · e25645b1
      Linus Torvalds authored
      Merge tag 'linux-kselftest-5.5-rc1-kunit' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest
      
      Pull kselftest KUnit support gtom Shuah Khan:
       "This adds KUnit, a lightweight unit testing and mocking framework for
        the Linux kernel from Brendan Higgins.
      
        KUnit is not an end-to-end testing framework. It is currently
        supported on UML and sub-systems can write unit tests and run them in
        UML env. KUnit documentation is included in this update.
      
        In addition, this Kunit update adds 3 new kunit tests:
      
         - proc sysctl test from Iurii Zaikin
      
         - the 'list' doubly linked list test from David Gow
      
         - ext4 tests for decoding extended timestamps from Iurii Zaikin
      
        In the future KUnit will be linked to Kselftest framework to provide a
        way to trigger KUnit tests from user-space"
      
      * tag 'linux-kselftest-5.5-rc1-kunit' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: (23 commits)
        lib/list-test: add a test for the 'list' doubly linked list
        ext4: add kunit test for decoding extended timestamps
        Documentation: kunit: Fix verification command
        kunit: Fix '--build_dir' option
        kunit: fix failure to build without printk
        MAINTAINERS: add proc sysctl KUnit test to PROC SYSCTL section
        kernel/sysctl-test: Add null pointer test for sysctl.c:proc_dointvec()
        MAINTAINERS: add entry for KUnit the unit testing framework
        Documentation: kunit: add documentation for KUnit
        kunit: defconfig: add defconfigs for building KUnit tests
        kunit: tool: add Python wrappers for running KUnit tests
        kunit: test: add tests for KUnit managed resources
        kunit: test: add the concept of assertions
        kunit: test: add tests for kunit test abort
        kunit: test: add support for test abort
        objtool: add kunit_try_catch_throw to the noreturn list
        kunit: test: add initial tests
        lib: enable building KUnit in lib/
        kunit: test: add the concept of expectations
        kunit: test: add assertion printing library
        ...
      e25645b1
    • Linus Torvalds's avatar
      Merge tag 'linux-kselftest-5.5-rc1-fixes' of... · db7d2754
      Linus Torvalds authored
      Merge tag 'linux-kselftest-5.5-rc1-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest
      
      Pull kselftest fixes from Shuah Khan:
       "This consists of several fixes to tests and framework.
      
        Masami Hiramatsu fixed several tests to build and run correctly on arm
        and other 32bit architectures"
      
      * tag 'linux-kselftest-5.5-rc1-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
        selftests: sync: Fix cast warnings on arm
        selftests: net: Fix printf format warnings on arm
        selftests: net: Use size_t and ssize_t for counting file size
        selftests: vm: Build/Run 64bit tests only on 64bit arch
        selftests: proc: Make va_max 1MB
        kselftest: Fix NULL INSTALL_PATH for TARGETS runlist
        selftests: Move kselftest_module.sh into kselftest/
        selftests: gen_kselftest_tar.sh: Do not clobber kselftest/
        selftests: breakpoints: Fix a typo of function name
        selftests: Fix O= and KBUILD_OUTPUT handling for relative paths
      db7d2754
    • Linus Torvalds's avatar
      Merge tag 'fsverity-for-linus' of git://git.kernel.org/pub/scm/fs/fscrypt/fscrypt · 1c1ff483
      Linus Torvalds authored
      Pull fsverity updates from Eric Biggers:
       "Expose the fs-verity bit through statx()"
      
      * tag 'fsverity-for-linus' of git://git.kernel.org/pub/scm/fs/fscrypt/fscrypt:
        docs: fs-verity: mention statx() support
        f2fs: support STATX_ATTR_VERITY
        ext4: support STATX_ATTR_VERITY
        statx: define STATX_ATTR_VERITY
        docs: fs-verity: document first supported kernel version
      1c1ff483
    • Linus Torvalds's avatar
      Merge tag 'fscrypt-for-linus' of git://git.kernel.org/pub/scm/fs/fscrypt/fscrypt · ea4b71bc
      Linus Torvalds authored
      Pull fscrypt updates from Eric Biggers:
      
       - Add the IV_INO_LBLK_64 encryption policy flag which modifies the
         encryption to be optimized for UFS inline encryption hardware.
      
       - For AES-128-CBC, use the crypto API's implementation of ESSIV (which
         was added in 5.4) rather than doing ESSIV manually.
      
       - A few other cleanups.
      
      * tag 'fscrypt-for-linus' of git://git.kernel.org/pub/scm/fs/fscrypt/fscrypt:
        f2fs: add support for IV_INO_LBLK_64 encryption policies
        ext4: add support for IV_INO_LBLK_64 encryption policies
        fscrypt: add support for IV_INO_LBLK_64 policies
        fscrypt: avoid data race on fscrypt_mode::logged_impl_name
        docs: ioctl-number: document fscrypt ioctl numbers
        fscrypt: zeroize fscrypt_info before freeing
        fscrypt: remove struct fscrypt_ctx
        fscrypt: invoke crypto API for ESSIV handling
      ea4b71bc
    • Linus Torvalds's avatar
      Merge tag 'affs-for-5.5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux · ae36607b
      Linus Torvalds authored
      Pull AFFS updates from David Sterba:
       "A minor bugfix and cleanup for AFFS"
      
      * tag 'affs-for-5.5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
        affs: fix a memory leak in affs_remount
        affs: Replace binary semaphores with mutexes
      ae36607b
    • Linus Torvalds's avatar
      Merge tag 'for-5.5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux · 97d0bf96
      Linus Torvalds authored
      Pull btrfs updates from David Sterba:
       "User visible changes:
         - new block group profiles: RAID1 with 3- and 4- copies
             - RAID1 in btrfs has always 2 copies, now add support for 3 and 4
             - this is an incompat feature (named RAID1C34)
             - recommended use of RAID1C3 is replacement of RAID6 profile on
               metadata, this brings a more reliable resiliency against 2
               device loss/damage
      
         - support for new checksums
             - per-filesystem, set at mkfs time
             - fast hash (crc32c successor): xxhash, 64bit digest
             - strong hashes (both 256bit): sha256 (slower, FIPS), blake2b
               (faster)
             - the blake2b module goes via the crypto tree, btrfs.ko has a
               soft dependency
      
         - speed up lseek, don't take inode locks unnecessarily, this can
           speed up parallel SEEK_CUR/SEEK_SET/SEEK_END by 80%
      
         - send:
             - allow clone operations within the same file
             - limit maximum number of sent clone references to avoid slow
               backref walking
      
         - error message improvements: device scan prints process name and PID
      
        Core changes:
         - cleanups
             - remove unique workqueue helpers, used to provide a way to avoid
               deadlocks in the workqueue code, now done in a simpler way
             - remove lots of indirect function calls in compression code
             - extent IO tree code moved out of extent_io.c
             - cleanup backup superblock handling at mount time
             - transaction life cycle documentation and cleanups
             - locking code cleanups, annotations and documentation
             - add more cold, const, pure function attributes
             - removal of unused or redundant struct members or variables
      
         - new tree-checker sanity tests
             - try to detect missing INODE_ITEM, cross-reference checks of
               DIR_ITEM, DIR_INDEX, INODE_REF, and XATTR_* items
      
         - remove own bio scheduling code (used to avoid checksum submissions
           being stuck behind other IO), replaced by cgroup controller-based
           code to allow better control and avoid priority inversions in cases
           where the custom and cgroup scheduling disagreed
      
        Fixes:
         - avoid getting stuck during cyclic writebacks
      
         - fix trimming of ranges crossing block group boundaries
      
         - fix rename exchange on subvolumes, all involved subvolumes need to
           be recorded in the transaction"
      
      * tag 'for-5.5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux: (137 commits)
        btrfs: drop bdev argument from submit_extent_page
        btrfs: remove extent_map::bdev
        btrfs: drop bio_set_dev where not needed
        btrfs: get bdev directly from fs_devices in submit_extent_page
        btrfs: record all roots for rename exchange on a subvol
        Btrfs: fix block group remaining RO forever after error during device replace
        btrfs: scrub: Don't check free space before marking a block group RO
        btrfs: change btrfs_fs_devices::rotating to bool
        btrfs: change btrfs_fs_devices::seeding to bool
        btrfs: rename btrfs_block_group_cache
        btrfs: block-group: Reuse the item key from caller of read_one_block_group()
        btrfs: block-group: Refactor btrfs_read_block_groups()
        btrfs: document extent buffer locking
        btrfs: access eb::blocking_writers according to ACCESS_ONCE policies
        btrfs: set blocking_writers directly, no increment or decrement
        btrfs: merge blocking_writers branches in btrfs_tree_read_lock
        btrfs: drop incompat bit for raid1c34 after last block group is gone
        btrfs: add incompat for raid1 with 3, 4 copies
        btrfs: add support for 4-copy replication (raid1c4)
        btrfs: add support for 3-copy replication (raid1c3)
        ...
      97d0bf96
    • Linus Torvalds's avatar
      Merge tag 'mtd/for-5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux · 1b88176b
      Linus Torvalds authored
      Pull MTD updates from Miquel Raynal:
       "MTD core:
         - drop inactive maintainers, update the repositories and add IRC
           channel
         - debugfs functions improvements
         - initialize more structure parameters
         - misc fixes reported by robots
      
        MTD devices:
         - spear_smi: Fixed Write Burst mode
         - new Intel IXP4xx flash probing hook
      
        Raw NAND core:
         - useless extra checks dropped
         - update the detection of the bad block markers position
      
        Raw NAND controller drivers:
         - Cadence: new driver
         - Brcmnand: support for flash-dma v0 + fixes
         - Denali: drop support for the legacy controller/chip DT representation
         - superfluous dev_err() calls removed
      
        SPI NOR core changes:
         - introduce 'struct spi_nor_controller_ops'
         - clean the Register Operations methods
         - use dev_dbg insted of dev_err for low level info
         - fix retlen handling in sst_write()
         - fix silent truncations in spi_nor_read and spi_nor_read_raw()
         - fix the clearing of QE bit on lock()/unlock()
         - rework the disabling of the block write protection
         - rework the Quad Enable methods
         - make sure nor->spimem and nor->controller_ops are mutually exclusive
         - set default Quad Enable method for ISSI flashes
         - add support for few flashes
      
        SPI NOR controller drivers changes:
         - intel-spi:
            - support chips without software sequencer
            - add support for Intel Cannon Lake and Intel Comet Lake-H flashes
      
        CFI core changes:
         - code cleanups related useless initializers and coding style issues
         - fix for a possible double free problem in cfi_cmdset_0002
         - improved HyperFlash error reporting and handling in cfi_cmdset_0002 core"
      
      * tag 'mtd/for-5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux: (73 commits)
        mtd: devices: fix mchp23k256 read and write
        mtd: no need to check return value of debugfs_create functions
        mtd: spi-nor: Set default Quad Enable method for ISSI flashes
        mtd: spi-nor: Add support for is25wp256
        mtd: spi-nor: Add support for w25q256jw
        mtd: spi-nor: Move condition to avoid a NULL check
        mtd: spi-nor: Make sure nor->spimem and nor->controller_ops are mutually exclusive
        mtd: spi-nor: Rename Quad Enable methods
        mtd: spi-nor: Merge spansion Quad Enable methods
        mtd: spi-nor: Rename CR_QUAD_EN_SPAN to SR2_QUAD_EN_BIT1
        mtd: spi-nor: Extend the SR Read Back test
        mtd: spi-nor: Rework the disabling of block write protection
        mtd: spi-nor: Fix clearing of QE bit on lock()/unlock()
        mtd: cfi_cmdset_0002: fix delayed error detection on HyperFlash
        mtd: cfi_cmdset_0002: only check errors when ready in cfi_check_err_status()
        mtd: cfi_cmdset_0002: don't free cfi->cfiq in error path of cfi_amdstd_setup()
        mtd: cfi_cmdset_*: kill useless 'ret' variable initializers
        mtd: cfi_util: use DIV_ROUND_UP() in cfi_udelay()
        mtd: spi-nor: Print debug message when the read back test fails
        mtd: spi-nor: Check all the bits written, not just the BP ones
        ...
      1b88176b
    • Linus Torvalds's avatar
      Merge tag 'for-5.5/dm-changes' of... · eeee2827
      Linus Torvalds authored
      Merge tag 'for-5.5/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
      
      Pull device mapper updates from Mike Snitzer:
      
       - Fix DM core to disallow stacking request-based DM on partitions.
      
       - Fix DM raid target to properly resync raidset even if bitmap needed
         additional pages.
      
       - Fix DM crypt performance regression due to use of WQ_HIGHPRI for the
         IO and crypt workqueues.
      
       - Fix DM integrity metadata layout that was aligned on 128K boundary
         rather than the intended 4K boundary (removes 124K of wasted space
         for each metadata block).
      
       - Improve the DM thin, cache and clone targets to use spin_lock_irq
         rather than spin_lock_irqsave where possible.
      
       - Fix DM thin single thread performance that was lost due to needless
         workqueue wakeups.
      
       - Fix DM zoned target performance that was lost due to excessive
         backing device checks.
      
       - Add ability to trigger write failure with the DM dust test target.
      
       - Fix whitespace indentation in drivers/md/Kconfig.
      
       - Various smalls fixes and cleanups (e.g. use struct_size, fix
         uninitialized variable, variable renames, etc).
      
      * tag 'for-5.5/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm: (22 commits)
        Revert "dm crypt: use WQ_HIGHPRI for the IO and crypt workqueues"
        dm: Fix Kconfig indentation
        dm thin: wakeup worker only when deferred bios exist
        dm integrity: fix excessive alignment of metadata runs
        dm raid: Remove unnecessary negation of a shift in raid10_format_to_md_layout
        dm zoned: reduce overhead of backing device checks
        dm dust: add limited write failure mode
        dm dust: change ret to r in dust_map_read and dust_map
        dm dust: change result vars to r
        dm cache: replace spin_lock_irqsave with spin_lock_irq
        dm bio prison: replace spin_lock_irqsave with spin_lock_irq
        dm thin: replace spin_lock_irqsave with spin_lock_irq
        dm clone: add bucket_lock_irq/bucket_unlock_irq helpers
        dm clone: replace spin_lock_irqsave with spin_lock_irq
        dm writecache: handle REQ_FUA
        dm writecache: fix uninitialized variable warning
        dm stripe: use struct_size() in kmalloc()
        dm raid: streamline rs_get_progress() and its raid_status() caller side
        dm raid: simplify rs_setup_recovery call chain
        dm raid: to ensure resynchronization, perform raid set grow in preresume
        ...
      eeee2827
    • Linus Torvalds's avatar
      Merge tag 'for-5.5/disk-revalidate-20191122' of git://git.kernel.dk/linux-block · 7e5192b9
      Linus Torvalds authored
      Pull disk revalidation updates from Jens Axboe:
       "This continues the work that Jan Kara started to thoroughly cleanup
        and consolidate how we handle rescans and revalidations"
      
      * tag 'for-5.5/disk-revalidate-20191122' of git://git.kernel.dk/linux-block:
        block: move clearing bd_invalidated into check_disk_size_change
        block: remove (__)blkdev_reread_part as an exported API
        block: fix bdev_disk_changed for non-partitioned devices
        block: move rescan_partitions to fs/block_dev.c
        block: merge invalidate_partitions into rescan_partitions
        block: refactor rescan_partitions
      7e5192b9
    • Linus Torvalds's avatar
      Merge tag 'for-5.5/zoned-20191122' of git://git.kernel.dk/linux-block · 464a47f4
      Linus Torvalds authored
      Pull zoned block device update from Jens Axboe:
       "Enhancements and improvements to the zoned device support"
      
      * tag 'for-5.5/zoned-20191122' of git://git.kernel.dk/linux-block:
        scsi: sd_zbc: Remove set but not used variable 'buflen'
        block: rework zone reporting
        scsi: sd_zbc: Cleanup sd_zbc_alloc_report_buffer()
        null_blk: Add zone_nr_conv to features
        null_blk: clean up report zones
        null_blk: clean up the block device operations
        block: Remove partition support for zoned block devices
        block: Simplify report zones execution
        block: cleanup the !zoned case in blk_revalidate_disk_zones
        block: Enhance blk_revalidate_disk_zones()
      464a47f4
    • Linus Torvalds's avatar
      Merge tag 'for-5.5/drivers-post-20191122' of git://git.kernel.dk/linux-block · 323264ee
      Linus Torvalds authored
      Pull additional block driver updates from Jens Axboe:
       "Here's another block driver update, done to avoid conflicts with the
        zoned changes coming next.
      
        This contains:
      
         - Prepare SCSI sd for zone open/close/finish support
      
         - Small NVMe pull request
              - hwmon support (Akinobu)
              - add new co-maintainer (Christoph)
              - work-around for a discard issue on non-conformant drives
                (Eduard)
      
         - Small nbd leak fix"
      
      * tag 'for-5.5/drivers-post-20191122' of git://git.kernel.dk/linux-block:
        nbd: prevent memory leak
        nvme: hwmon: add quirk to avoid changing temperature threshold
        nvme: hwmon: provide temperature min and max values for each sensor
        nvmet: add another maintainer
        nvme: Discard workaround for non-conformant devices
        nvme: Add hardware monitoring support
        scsi: sd_zbc: add zone open, close, and finish support
      323264ee
    • Linus Torvalds's avatar
      Merge tag 'for-5.5/drivers-20191121' of git://git.kernel.dk/linux-block · 2d539430
      Linus Torvalds authored
      Pull block driver updates from Jens Axboe:
       "Here are the main block driver updates for 5.5. Nothing major in here,
        mostly just fixes. This contains:
      
         - a set of bcache changes via Coly
      
         - MD changes from Song
      
         - loop unmap write-zeroes fix (Darrick)
      
         - spelling fixes (Geert)
      
         - zoned additions cleanups to null_blk/dm (Ajay)
      
         - allow null_blk online submit queue changes (Bart)
      
         - NVMe changes via Keith, nothing major here either"
      
      * tag 'for-5.5/drivers-20191121' of git://git.kernel.dk/linux-block: (56 commits)
        Revert "bcache: fix fifo index swapping condition in journal_pin_cmp()"
        drivers/md/raid5-ppl.c: use the new spelling of RWH_WRITE_LIFE_NOT_SET
        drivers/md/raid5.c: use the new spelling of RWH_WRITE_LIFE_NOT_SET
        bcache: don't export symbols
        bcache: remove the extra cflags for request.o
        bcache: at least try to shrink 1 node in bch_mca_scan()
        bcache: add idle_max_writeback_rate sysfs interface
        bcache: add code comments in bch_btree_leaf_dirty()
        bcache: fix deadlock in bcache_allocator
        bcache: add code comment bch_keylist_pop() and bch_keylist_pop_front()
        bcache: deleted code comments for dead code in bch_data_insert_keys()
        bcache: add more accurate error messages in read_super()
        bcache: fix static checker warning in bcache_device_free()
        bcache: fix a lost wake-up problem caused by mca_cannibalize_lock
        bcache: fix fifo index swapping condition in journal_pin_cmp()
        md/raid10: prevent access of uninitialized resync_pages offset
        md: avoid invalid memory access for array sb->dev_roles
        md/raid1: avoid soft lockup under high load
        null_blk: add zone open, close, and finish support
        dm: add zone open, close and finish support
        ...
      2d539430
    • Linus Torvalds's avatar
      Merge tag 'for-5.5/block-20191121' of git://git.kernel.dk/linux-block · ff6814b0
      Linus Torvalds authored
      Pull core block updates from Jens Axboe:
       "Due to more granular branches, this one is small and will be followed
        with other core branches that add specific features. I meant to just
        have a core and drivers branch, but external dependencies we ended up
        adding a few more that are also core.
      
        The changes are:
      
         - Fixes and improvements for the zoned device support (Ajay, Damien)
      
         - sed-opal table writing and datastore UID (Revanth)
      
         - blk-cgroup (and bfq) blk-cgroup stat fixes (Tejun)
      
         - Improvements to the block stats tracking (Pavel)
      
         - Fix for overruning sysfs buffer for large number of CPUs (Ming)
      
         - Optimization for small IO (Ming, Christoph)
      
         - Fix typo in RWH lifetime hint (Eugene)
      
         - Dead code removal and documentation (Bart)
      
         - Reduction in memory usage for queue and tag set (Bart)
      
         - Kerneldoc header documentation (André)
      
         - Device/partition revalidation fixes (Jan)
      
         - Stats tracking for flush requests (Konstantin)
      
         - Various other little fixes here and there (et al)"
      
      * tag 'for-5.5/block-20191121' of git://git.kernel.dk/linux-block: (48 commits)
        Revert "block: split bio if the only bvec's length is > SZ_4K"
        block: add iostat counters for flush requests
        block,bfq: Skip tracing hooks if possible
        block: sed-opal: Introduce SUM_SET_LIST parameter and append it using 'add_token_u64'
        blk-cgroup: cgroup_rstat_updated() shouldn't be called on cgroup1
        block: Don't disable interrupts in trigger_softirq()
        sbitmap: Delete sbitmap_any_bit_clear()
        blk-mq: Delete blk_mq_has_free_tags() and blk_mq_can_queue()
        block: split bio if the only bvec's length is > SZ_4K
        block: still try to split bio if the bvec crosses pages
        blk-cgroup: separate out blkg_rwstat under CONFIG_BLK_CGROUP_RWSTAT
        blk-cgroup: reimplement basic IO stats using cgroup rstat
        blk-cgroup: remove now unused blkg_print_stat_{bytes|ios}_recursive()
        blk-throtl: stop using blkg->stat_bytes and ->stat_ios
        bfq-iosched: stop using blkg->stat_bytes and ->stat_ios
        bfq-iosched: relocate bfqg_*rwstat*() helpers
        block: add zone open, close and finish ioctl support
        block: add zone open, close and finish operations
        block: Simplify REQ_OP_ZONE_RESET_ALL handling
        block: Remove REQ_OP_ZONE_RESET plugging
        ...
      ff6814b0
    • Linus Torvalds's avatar
      Merge tag 'for-5.5/libata-20191121' of git://git.kernel.dk/linux-block · 6e7b06a4
      Linus Torvalds authored
      Pull libata updates from Jens Axboe:
       "Just a few fixes all over the place, support for the Annapurna SATA
        controller, and a patchset that cleans up the error defines and
        ultimately fixes anissue with sata_mv"
      
      * tag 'for-5.5/libata-20191121' of git://git.kernel.dk/linux-block:
        ata: pata_artop: make arrays static const, makes object smaller
        ata_piix: remove open-coded dmi_match(DMI_OEM_STRING)
        ata: sata_mv, avoid trigerrable BUG_ON
        ata: make qc_prep return ata_completion_errors
        ata: define AC_ERR_OK
        ata: Documentation, fix function names
        libata: Ensure ata_port probe has completed before detach
        ahci: tegra: use regulator_bulk_set_supply_names()
        ahci: Add support for Amazon's Annapurna Labs SATA controller
      6e7b06a4
    • Linus Torvalds's avatar
      Merge tag 'for-5.5/io_uring-20191121' of git://git.kernel.dk/linux-block · fb4b3d3f
      Linus Torvalds authored
      Pull io_uring updates from Jens Axboe:
       "A lot of stuff has been going on this cycle, with improving the
        support for networked IO (and hence unbounded request completion
        times) being one of the major themes. There's been a set of fixes done
        this week, I'll send those out as well once we're certain we're fully
        happy with them.
      
        This contains:
      
         - Unification of the "normal" submit path and the SQPOLL path (Pavel)
      
         - Support for sparse (and bigger) file sets, and updating of those
           file sets without needing to unregister/register again.
      
         - Independently sized CQ ring, instead of just making it always 2x
           the SQ ring size. This makes it more flexible for networked
           applications.
      
         - Support for overflowed CQ ring, never dropping events but providing
           backpressure on submits.
      
         - Add support for absolute timeouts, not just relative ones.
      
         - Support for generic cancellations. This divorces io_uring from
           workqueues as well, which additionally gets us one step closer to
           generic async system call support.
      
         - With cancellations, we can support grabbing the process file table
           as well, just like we do mm context. This allows support for system
           calls that create file descriptors, like accept4() support that's
           built on top of that.
      
         - Support for io_uring tracing (Dmitrii)
      
         - Support for linked timeouts. These abort an operation if it isn't
           completed by the time noted in the linke timeout.
      
         - Speedup tracking of poll requests
      
         - Various cleanups making the coder easier to follow (Jackie, Pavel,
           Bob, YueHaibing, me)
      
         - Update MAINTAINERS with new io_uring list"
      
      * tag 'for-5.5/io_uring-20191121' of git://git.kernel.dk/linux-block: (64 commits)
        io_uring: make POLL_ADD/POLL_REMOVE scale better
        io-wq: remove now redundant struct io_wq_nulls_list
        io_uring: Fix getting file for non-fd opcodes
        io_uring: introduce req_need_defer()
        io_uring: clean up io_uring_cancel_files()
        io-wq: ensure free/busy list browsing see all items
        io-wq: ensure we have a stable view of ->cur_work for cancellations
        io_wq: add get/put_work handlers to io_wq_create()
        io_uring: check for validity of ->rings in teardown
        io_uring: fix potential deadlock in io_poll_wake()
        io_uring: use correct "is IO worker" helper
        io_uring: fix -ENOENT issue with linked timer with short timeout
        io_uring: don't do flush cancel under inflight_lock
        io_uring: flag SQPOLL busy condition to userspace
        io_uring: make ASYNC_CANCEL work with poll and timeout
        io_uring: provide fallback request for OOM situations
        io_uring: convert accept4() -ERESTARTSYS into -EINTR
        io_uring: fix error clear of ->file_table in io_sqe_files_register()
        io_uring: separate the io_free_req and io_free_req_find_next interface
        io_uring: keep io_put_req only responsible for release and put req
        ...
      fb4b3d3f
    • Linus Torvalds's avatar
      Merge tag 'tpmdd-next-20191112' of git://git.infradead.org/users/jjs/linux-tpmdd · 54f0e540
      Linus Torvalds authored
      Pull tpmd updates from Jarkko Sakkinen:
      
       - support for Cr50 fTPM
      
       - support for fTPM on AMD Zen+ CPUs
      
       - TPM 2.0 trusted keys code relocated from drivers/char/tpm to
         security/keys
      
      * tag 'tpmdd-next-20191112' of git://git.infradead.org/users/jjs/linux-tpmdd:
        KEYS: trusted: Remove set but not used variable 'keyhndl'
        tpm: Switch to platform_get_irq_optional()
        tpm_crb: fix fTPM on AMD Zen+ CPUs
        KEYS: trusted: Move TPM2 trusted keys code
        KEYS: trusted: Create trusted keys subsystem
        KEYS: Use common tpm_buf for trusted and asymmetric keys
        tpm: Move tpm_buf code to include/linux/
        tpm: use GFP_KERNEL instead of GFP_HIGHMEM for tpm_buf
        tpm: add check after commands attribs tab allocation
        tpm: tpm_tis_spi: Drop THIS_MODULE usage from driver struct
        tpm: tpm_tis_spi: Cleanup includes
        tpm: tpm_tis_spi: Support cr50 devices
        tpm: tpm_tis_spi: Introduce a flow control callback
        tpm: Add a flag to indicate TPM power is managed by firmware
        dt-bindings: tpm: document properties for cr50
        tpm_tis: override durations for STM tpm with firmware 1.2.8.28
        tpm: provide a way to override the chip returned durations
        tpm: Remove duplicate code from caps_show() in tpm-sysfs.c
      54f0e540
    • Linus Torvalds's avatar
      vfs: properly and reliably lock f_pos in fdget_pos() · 0be0ee71
      Linus Torvalds authored
      fdget_pos() is used by file operations that will read and update f_pos:
      things like "read()", "write()" and "lseek()" (but not, for example,
      "pread()/pwrite" that get their file positions elsewhere).
      
      However, it had two separate escape clauses for this, because not
      everybody wants or needs serialization of the file position.
      
      The first and most obvious case is the "file descriptor doesn't have a
      position at all", ie a stream-like file.  Except we didn't actually use
      FMODE_STREAM, but instead used FMODE_ATOMIC_POS.  The reason for that
      was that FMODE_STREAM didn't exist back in the days, but also that we
      didn't want to mark all the special cases, so we only marked the ones
      that _required_ position atomicity according to POSIX - regular files
      and directories.
      
      The case one was intentionally lazy, but now that we _do_ have
      FMODE_STREAM we could and should just use it.  With the change to use
      FMODE_STREAM, there are no remaining uses for FMODE_ATOMIC_POS, and all
      the code to set it is deleted.
      
      Any cases where we don't want the serialization because the driver (or
      subsystem) doesn't use the file position should just be updated to do
      "stream_open()".  We've done that for all the obvious and common
      situations, we may need a few more.  Quoting Kirill Smelkov in the
      original FMODE_STREAM thread (see link below for full email):
      
       "And I appreciate if people could help at least somehow with "getting
        rid of mixed case entirely" (i.e. always lock f_pos_lock on
        !FMODE_STREAM), because this transition starts to diverge from my
        particular use-case too far. To me it makes sense to do that
        transition as follows:
      
         - convert nonseekable_open -> stream_open via stream_open.cocci;
         - audit other nonseekable_open calls and convert left users that
           truly don't depend on position to stream_open;
         - extend stream_open.cocci to analyze alloc_file_pseudo as well (this
           will cover pipes and sockets), or maybe convert pipes and sockets
           to FMODE_STREAM manually;
         - extend stream_open.cocci to analyze file_operations that use
           no_llseek or noop_llseek, but do not use nonseekable_open or
           alloc_file_pseudo. This might find files that have stream semantic
           but are opened differently;
         - extend stream_open.cocci to analyze file_operations whose
           .read/.write do not use ppos at all (independently of how file was
           opened);
         - ...
         - after that remove FMODE_ATOMIC_POS and always take f_pos_lock if
           !FMODE_STREAM;
         - gather bug reports for deadlocked read/write and convert missed
           cases to FMODE_STREAM, probably extending stream_open.cocci along
           the road to catch similar cases
      
        i.e. always take f_pos_lock unless a file is explicitly marked as
        being stream, and try to find and cover all files that are streams"
      
      We have not done the "extend stream_open.cocci to analyze
      alloc_file_pseudo" as well, but the previous commit did manually handle
      the case of pipes and sockets.
      
      The other case where we can avoid locking f_pos is the "this file
      descriptor only has a single user and it is us, and thus there is no
      need to lock it".
      
      The second test was correct, although a bit subtle and worth just
      re-iterating here.  There are two kinds of other sources of references
      to the same file descriptor: file descriptors that have been explicitly
      shared across fork() or with dup(), and file tables having elevated
      reference counts due to threading (or explicit file sharing with
      clone()).
      
      The first case would have incremented the file count explicitly, and in
      the second case the previous __fdget() would have incremented it for us
      and set the FDPUT_FPUT flag.
      
      But in both cases the file count would be greater than one, so the
      "file_count(file) > 1" test catches both situations.  Also note that if
      file_count is 1, that also means that no other thread can have access to
      the file table, so there also cannot be races with concurrent calls to
      dup()/fork()/clone() that would increment the file count any other way.
      
      Link: https://lore.kernel.org/linux-fsdevel/20190413184404.GA13490@deco.navytux.spb.ru
      Cc: Kirill Smelkov <kirr@nexedi.com>
      Cc: Eic Dumazet <edumazet@google.com>
      Cc: Al Viro <viro@zeniv.linux.org.uk>
      Cc: Alan Stern <stern@rowland.harvard.edu>
      Cc: Marco Elver <elver@google.com>
      Cc: Andrea Parri <parri.andrea@gmail.com>
      Cc: Paul McKenney <paulmck@kernel.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      0be0ee71
    • Linus Torvalds's avatar
      vfs: mark pipes and sockets as stream-like file descriptors · d8e464ec
      Linus Torvalds authored
      In commit 3975b097 ("convert stream-like files -> stream_open, even
      if they use noop_llseek") Kirill used a coccinelle script to change
      "nonseekable_open()" to "stream_open()", which changed the trivial cases
      of stream-like file descriptors to the new model with FMODE_STREAM.
      
      However, the two big cases - sockets and pipes - don't actually have
      that trivial pattern at all, and were thus never converted to
      FMODE_STREAM even though it makes lots of sense to do so.
      
      That's particularly true when looking forward to the next change:
      getting rid of FMODE_ATOMIC_POS entirely, and just using FMODE_STREAM to
      decide whether f_pos updates are needed or not.  And if they are, we'll
      always do them atomically.
      
      This came up because KCSAN (correctly) noted that the non-locked f_pos
      updates are data races: they are clearly benign for the case where we
      don't care, but it would be good to just not have that issue exist at
      all.
      
      Note that the reason we used FMODE_ATOMIC_POS originally is that only
      doing it for the minimal required case is "safer" in that it's possible
      that the f_pos locking can cause unnecessary serialization across the
      whole write() call.  And in the worst case, that kind of serialization
      can cause deadlock issues: think writers that need readers to empty the
      state using the same file descriptor.
      
      [ Note that the locking is per-file descriptor - because it protects
        "f_pos", which is obviously per-file descriptor - so it only affects
        cases where you literally use the same file descriptor to both read
        and write.
      
        So a regular pipe that has separate reading and writing file
        descriptors doesn't really have this situation even though it's the
        obvious case of "reader empties what a bit writer concurrently fills"
      
        But we want to make pipes as being stream-line anyway, because we
        don't want the unnecessary overhead of locking, and because a named
        pipe can be (ab-)used by reading and writing to the same file
        descriptor. ]
      
      There are likely a lot of other cases that might want FMODE_STREAM, and
      looking for ".llseek = no_llseek" users and other cases that don't have
      an lseek file operation at all and making them use "stream_open()" might
      be a good idea.  But pipes and sockets are likely to be the two main
      cases.
      
      Cc: Kirill Smelkov <kirr@nexedi.com>
      Cc: Eic Dumazet <edumazet@google.com>
      Cc: Al Viro <viro@zeniv.linux.org.uk>
      Cc: Alan Stern <stern@rowland.harvard.edu>
      Cc: Marco Elver <elver@google.com>
      Cc: Andrea Parri <parri.andrea@gmail.com>
      Cc: Paul McKenney <paulmck@kernel.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      d8e464ec
    • Paolo Bonzini's avatar
      Merge tag 'kvm-ppc-next-5.5-2' of... · 96710247
      Paolo Bonzini authored
      Merge tag 'kvm-ppc-next-5.5-2' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc into HEAD
      
      Second KVM PPC update for 5.5
      
      - Two fixes from Greg Kurz to fix memory leak bugs in the XIVE code.
      96710247
    • Linus Torvalds's avatar
      Linux 5.4 · 219d5433
      Linus Torvalds authored
      219d5433
  3. 24 Nov, 2019 3 commits
  4. 23 Nov, 2019 8 commits
    • Thomas Bogendoerfer's avatar
      MIPS: SGI-IP27: Enable ethernet phy on second Origin 200 module · a8d0f11e
      Thomas Bogendoerfer authored
      PROM only enables ethernet PHY on first Origin 200 module, so we must
      do it ourselves for the second module.
      Signed-off-by: default avatarThomas Bogendoerfer <tbogendoerfer@suse.de>
      Signed-off-by: default avatarPaul Burton <paulburton@kernel.org>
      Cc: Jakub Kicinski <jakub.kicinski@netronome.com>
      Cc: Jonathan Corbet <corbet@lwn.net>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: Paul Burton <paul.burton@mips.com>
      Cc: James Hogan <jhogan@kernel.org>
      Cc: Lee Jones <lee.jones@linaro.org>
      Cc: David S. Miller <davem@davemloft.net>
      Cc: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
      Cc: Alessandro Zummo <a.zummo@towertech.it>
      Cc: Alexandre Belloni <alexandre.belloni@bootlin.com>
      Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
      Cc: Jiri Slaby <jslaby@suse.com>
      Cc: linux-doc@vger.kernel.org
      Cc: linux-kernel@vger.kernel.org
      Cc: linux-mips@vger.kernel.org
      Cc: netdev@vger.kernel.org
      Cc: linux-rtc@vger.kernel.org
      Cc: linux-serial@vger.kernel.org
      a8d0f11e
    • Thomas Bogendoerfer's avatar
      MIPS: PCI: Fix fake subdevice ID for IOC3 · 29b261ff
      Thomas Bogendoerfer authored
      Generation of fake subdevice ID had vendor and device ID swapped.
      Signed-off-by: default avatarThomas Bogendoerfer <tbogendoerfer@suse.de>
      Signed-off-by: default avatarPaul Burton <paulburton@kernel.org>
      Cc: Jakub Kicinski <jakub.kicinski@netronome.com>
      Cc: Jonathan Corbet <corbet@lwn.net>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: Paul Burton <paul.burton@mips.com>
      Cc: James Hogan <jhogan@kernel.org>
      Cc: Lee Jones <lee.jones@linaro.org>
      Cc: David S. Miller <davem@davemloft.net>
      Cc: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
      Cc: Alessandro Zummo <a.zummo@towertech.it>
      Cc: Alexandre Belloni <alexandre.belloni@bootlin.com>
      Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
      Cc: Jiri Slaby <jslaby@suse.com>
      Cc: linux-doc@vger.kernel.org
      Cc: linux-kernel@vger.kernel.org
      Cc: linux-mips@vger.kernel.org
      Cc: netdev@vger.kernel.org
      Cc: linux-rtc@vger.kernel.org
      Cc: linux-serial@vger.kernel.org
      29b261ff
    • Linus Torvalds's avatar
      Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost · 6b8a7946
      Linus Torvalds authored
      Pull last minute virtio bugfixes from Michael Tsirkin:
       "Minor bugfixes all over the place"
      
      * tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
        virtio_balloon: fix shrinker count
        virtio_balloon: fix shrinker scan number of pages
        virtio_console: allocate inbufs in add_port() only if it is needed
        virtio_ring: fix return code on DMA mapping fails
      6b8a7946
    • Jim Mattson's avatar
      kvm: nVMX: Relax guest IA32_FEATURE_CONTROL constraints · 85c9aae9
      Jim Mattson authored
      Commit 37e4c997 ("KVM: VMX: validate individual bits of guest
      MSR_IA32_FEATURE_CONTROL") broke the KVM_SET_MSRS ABI by instituting
      new constraints on the data values that kvm would accept for the guest
      MSR, IA32_FEATURE_CONTROL. Perhaps these constraints should have been
      opt-in via a new KVM capability, but they were applied
      indiscriminately, breaking at least one existing hypervisor.
      
      Relax the constraints to allow either or both of
      FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX and
      FEATURE_CONTROL_VMXON_ENABLED_INSIDE_SMX to be set when nVMX is
      enabled. This change is sufficient to fix the aforementioned breakage.
      
      Fixes: 37e4c997 ("KVM: VMX: validate individual bits of guest MSR_IA32_FEATURE_CONTROL")
      Signed-off-by: default avatarJim Mattson <jmattson@google.com>
      Reviewed-by: default avatarLiran Alon <liran.alon@oracle.com>
      Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      85c9aae9
    • Sean Christopherson's avatar
      KVM: x86: Grab KVM's srcu lock when setting nested state · ad5996d9
      Sean Christopherson authored
      Acquire kvm->srcu for the duration of ->set_nested_state() to fix a bug
      where nVMX derefences ->memslots without holding ->srcu or ->slots_lock.
      
      The other half of nested migration, ->get_nested_state(), does not need
      to acquire ->srcu as it is a purely a dump of internal KVM (and CPU)
      state to userspace.
      
      Detected as an RCU lockdep splat that is 100% reproducible by running
      KVM's state_test selftest with CONFIG_PROVE_LOCKING=y.  Note that the
      failing function, kvm_is_visible_gfn(), is only checking the validity of
      a gfn, it's not actually accessing guest memory (which is more or less
      unsupported during vmx_set_nested_state() due to incorrect MMU state),
      i.e. vmx_set_nested_state() itself isn't fundamentally broken.  In any
      case, setting nested state isn't a fast path so there's no reason to go
      out of our way to avoid taking ->srcu.
      
        =============================
        WARNING: suspicious RCU usage
        5.4.0-rc7+ #94 Not tainted
        -----------------------------
        include/linux/kvm_host.h:626 suspicious rcu_dereference_check() usage!
      
                     other info that might help us debug this:
      
        rcu_scheduler_active = 2, debug_locks = 1
        1 lock held by evmcs_test/10939:
         #0: ffff88826ffcb800 (&vcpu->mutex){+.+.}, at: kvm_vcpu_ioctl+0x85/0x630 [kvm]
      
        stack backtrace:
        CPU: 1 PID: 10939 Comm: evmcs_test Not tainted 5.4.0-rc7+ #94
        Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015
        Call Trace:
         dump_stack+0x68/0x9b
         kvm_is_visible_gfn+0x179/0x180 [kvm]
         mmu_check_root+0x11/0x30 [kvm]
         fast_cr3_switch+0x40/0x120 [kvm]
         kvm_mmu_new_cr3+0x34/0x60 [kvm]
         nested_vmx_load_cr3+0xbd/0x1f0 [kvm_intel]
         nested_vmx_enter_non_root_mode+0xab8/0x1d60 [kvm_intel]
         vmx_set_nested_state+0x256/0x340 [kvm_intel]
         kvm_arch_vcpu_ioctl+0x491/0x11a0 [kvm]
         kvm_vcpu_ioctl+0xde/0x630 [kvm]
         do_vfs_ioctl+0xa2/0x6c0
         ksys_ioctl+0x66/0x70
         __x64_sys_ioctl+0x16/0x20
         do_syscall_64+0x54/0x200
         entry_SYSCALL_64_after_hwframe+0x49/0xbe
        RIP: 0033:0x7f59a2b95f47
      
      Fixes: 8fcc4b59 ("kvm: nVMX: Introduce KVM_CAP_NESTED_STATE")
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarSean Christopherson <sean.j.christopherson@intel.com>
      Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      ad5996d9
    • Sean Christopherson's avatar
      KVM: x86: Open code shared_msr_update() in its only caller · 05c19c2f
      Sean Christopherson authored
      Fold shared_msr_update() into its sole user to eliminate its pointless
      bounds check, its godawful printk, its misleading comment (it's called
      under a global lock), and its woefully inaccurate name.
      Signed-off-by: default avatarSean Christopherson <sean.j.christopherson@intel.com>
      Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      05c19c2f
    • Miaohe Lin's avatar
      KVM: Fix jump label out_free_* in kvm_init() · faf0be22
      Miaohe Lin authored
      The jump label out_free_1 and out_free_2 deal with
      the same stuff, so git rid of one and rename the
      label out_free_0a to retain the label name order.
      Signed-off-by: default avatarMiaohe Lin <linmiaohe@huawei.com>
      Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      faf0be22
    • Sean Christopherson's avatar
      KVM: x86: Remove a spurious export of a static function · 24885d1d
      Sean Christopherson authored
      A recent change inadvertently exported a static function, which results
      in modpost throwing a warning.  Fix it.
      
      Fixes: cbbaa272 ("KVM: x86: fix presentation of TSX feature in ARCH_CAPABILITIES")
      Signed-off-by: default avatarSean Christopherson <sean.j.christopherson@intel.com>
      Cc: stable@vger.kernel.org
      Reviewed-by: default avatarJim Mattson <jmattson@google.com>
      Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      24885d1d