1. 25 Apr, 2023 8 commits
  2. 24 Apr, 2023 32 commits
    • Linus Torvalds's avatar
      Merge tag 'erofs-for-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs · 61d325dc
      Linus Torvalds authored
      Pull erofs updates from Gao Xiang:
       "In this cycle, sub-page block support for uncompressed files is
        available. It's mainly used to enable original signing ('golden')
        4k-block images on arm64 with 16/64k pages. In addition, end users
        could also use this feature to build a manifest to directly refer to
        golden tar data.
      
        Besides, long xattr name prefix support is also introduced in this
        cycle to avoid too many xattrs with the same prefix (e.g. overlayfs
        xattrs). It's useful for erofs + overlayfs combination (like Composefs
        model): the image size is reduced by ~14% and runtime performance is
        also slightly improved.
      
        Others are random fixes and cleanups as usual.
      
        Summary:
      
         - Add sub-page block size support for uncompressed files
      
         - Support flattened block device for multi-blob images to be attached
           into virtual machines (including cloud servers) and bare metals
      
         - Support long xattr name prefixes to optimize images with common
           xattr namespaces (e.g. files with overlayfs xattrs) use cases
      
         - Various minor cleanups & fixes"
      
      * tag 'erofs-for-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs:
        erofs: cleanup i_format-related stuffs
        erofs: sunset erofs_dbg()
        erofs: fix potential overflow calculating xattr_isize
        erofs: get rid of z_erofs_fill_inode()
        erofs: enable long extended attribute name prefixes
        erofs: handle long xattr name prefixes properly
        erofs: add helpers to load long xattr name prefixes
        erofs: introduce on-disk format for long xattr name prefixes
        erofs: move packed inode out of the compression part
        erofs: keep meta inode into erofs_buf
        erofs: initialize packed inode after root inode is assigned
        erofs: stop parsing non-compact HEAD index if clusterofs is invalid
        erofs: don't warn ztailpacking feature anymore
        erofs: simplify erofs_xattr_generic_get()
        erofs: rename init_inode_xattrs with erofs_ prefix
        erofs: move several xattr helpers into xattr.c
        erofs: tidy up EROFS on-disk naming
        erofs: support flattened block device for multi-blob images
        erofs: set block size to the on-disk block size
        erofs: avoid hardcoded blocksize for subpage block support
      61d325dc
    • Linus Torvalds's avatar
      Merge tag 'v6.4/vfs.open' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs · 97adb49f
      Linus Torvalds authored
      Pull vfs open fixlet from Christian Brauner:
       "EINVAL ist keinmal: This contains the changes to make O_DIRECTORY when
        specified together with O_CREAT an invalid request.
      
        The wider background is that a regression report about the behavior of
        O_DIRECTORY | O_CREAT was sent to fsdevel about a behavior that was
        changed multiple years and LTS releases earlier during v5.7
        development.
      
        This has also been covered in
      
              https://lwn.net/Articles/926782/
      
        which provides an excellent summary of the discussion"
      
      * tag 'v6.4/vfs.open' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
        open: return EINVAL for O_DIRECTORY | O_CREAT
      97adb49f
    • Linus Torvalds's avatar
      Merge tag 'v6.4/vfs.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs · e2eff52c
      Linus Torvalds authored
      Pull misc vfs updates from Christian Brauner:
       "This contains a pile of various smaller fixes. Most of them aren't
        very interesting so this just highlights things worth mentioning:
      
         - Various filesystems contained the same little helper to convert
           from the mode of a dentry to the DT_* type of that dentry.
      
           They have now all been switched to rely on the generic
           fs_umode_to_dtype() helper. All custom helpers are removed (Jeff)
      
         - Fsnotify now reports ACCESS and MODIFY events for splice
           (Chung-Chiang Cheng)
      
         - After converting timerfd a long time ago to rely on
           wait_event_interruptible_*() apis, convert eventfd as well. This
           removes the complex open-coded wait code (Wen Yang)
      
         - Simplify sysctl registration for devpts, avoiding the declaration
           of two tables. Instead, just use a prefixed path with
           register_sysctl() (Luis)
      
         - The setattr_should_drop_sgid() helper is now exported so NFS can
           use it. By switching NFS to this helper an NFS setgid inheritance
           bug is fixed (me)"
      
      * tag 'v6.4/vfs.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
        fs: hfsplus: remove WARN_ON() from hfsplus_cat_{read,write}_inode()
        pnode: pass mountpoint directly
        eventfd: use wait_event_interruptible_locked_irq() helper
        splice: report related fsnotify events
        fs: consolidate duplicate dt_type helpers
        nfs: use vfs setgid helper
        Update relatime comments to include equality
        fs/buffer: Remove redundant assignment to err
        fs_context: drop the unused lsm_flags member
        fs/namespace: fnic: Switch to use %ptTd
        Documentation: update idmappings.rst
        devpts: simplify two-level sysctl registration for pty_kern_table
        eventpoll: align comment with nested epoll limitation
      e2eff52c
    • Linus Torvalds's avatar
      Merge tag 'v6.4/vfs.acl' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs · 7bcff5a3
      Linus Torvalds authored
      Pull acl updates from Christian Brauner:
       "After finishing the introduction of the new posix acl api last cycle
        the generic POSIX ACL xattr handlers are still around in the
        filesystems xattr handlers for two reasons:
      
         (1) Because a few filesystems rely on the ->list() method of the
             generic POSIX ACL xattr handlers in their ->listxattr() inode
             operation.
      
         (2) POSIX ACLs are only available if IOP_XATTR is raised. The
             IOP_XATTR flag is raised in inode_init_always() based on whether
             the sb->s_xattr pointer is non-NULL. IOW, the registered xattr
             handlers of the filesystem are used to raise IOP_XATTR. Removing
             the generic POSIX ACL xattr handlers from all filesystems would
             risk regressing filesystems that only implement POSIX ACL support
             and no other xattrs (nfs3 comes to mind).
      
        This contains the work to decouple POSIX ACLs from the IOP_XATTR flag
        as they don't depend on xattr handlers anymore. So it's now possible
        to remove the generic POSIX ACL xattr handlers from the sb->s_xattr
        list of all filesystems. This is a crucial step as the generic POSIX
        ACL xattr handlers aren't used for POSIX ACLs anymore and POSIX ACLs
        don't depend on the xattr infrastructure anymore.
      
        Adressing problem (1) will require more long-term work. It would be
        best to get rid of the ->list() method of xattr handlers completely at
        some point.
      
        For erofs, ext{2,4}, f2fs, jffs2, ocfs2, and reiserfs the nop POSIX
        ACL xattr handler is kept around so they can continue to use
        array-based xattr handler indexing.
      
        This update does simplify the ->listxattr() implementation of all
        these filesystems however"
      
      * tag 'v6.4/vfs.acl' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
        acl: don't depend on IOP_XATTR
        ovl: check for ->listxattr() support
        reiserfs: rework priv inode handling
        fs: rename generic posix acl handlers
        reiserfs: rework ->listxattr() implementation
        fs: simplify ->listxattr() implementation
        fs: drop unused posix acl handlers
        xattr: remove unused argument
        xattr: add listxattr helper
        xattr: simplify listxattr helpers
      7bcff5a3
    • Linus Torvalds's avatar
      Merge tag 'v6.4/pidfd.file' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux · ec40758b
      Linus Torvalds authored
      Pull pidfd updates from Christian Brauner:
       "This adds a new pidfd_prepare() helper which allows the caller to
        reserve a pidfd number and allocates a new pidfd file that stashes the
        provided struct pid.
      
        It should be avoided installing a file descriptor into a task's file
        descriptor table just to close it again via close_fd() in case an
        error occurs. The fd has been visible to userspace and might already
        be in use. Instead, a file descriptor should be reserved but not
        installed into the caller's file descriptor table.
      
        If another failure path is hit then the reserved file descriptor and
        file can just be put without any userspace visible side-effects. And
        if all failure paths are cleared the file descriptor and file can be
        installed into the task's file descriptor table.
      
        This helper is now used in all places that open coded this
        functionality before. For example, this is currently done during
        copy_process() and fanotify used pidfd_create(), which returns a pidfd
        that has already been made visibile in the caller's file descriptor
        table, but then closed it using close_fd().
      
        In one of the next merge windows there is also new functionality
        coming to unix domain sockets that will have to rely on
        pidfd_prepare()"
      
      * tag 'v6.4/pidfd.file' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux:
        fanotify: use pidfd_prepare()
        fork: use pidfd_prepare()
        pid: add pidfd_prepare()
      ec40758b
    • Linus Torvalds's avatar
      Merge tag 'v6.4/kernel.user_worker' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux · 3323ddce
      Linus Torvalds authored
      Pull user work thread updates from Christian Brauner:
       "This contains the work generalizing the ability to create a kernel
        worker from a userspace process.
      
        Such user workers will run with the same credentials as the userspace
        process they were created from providing stronger security and
        accounting guarantees than the traditional override_creds() approach
        ever could've hoped for.
      
        The original work was heavily based and optimzed for the needs of
        io_uring which was the first user. However, as it quickly turned out
        the ability to create user workers inherting properties from a
        userspace process is generally useful.
      
        The vhost subsystem currently creates workers using the kthread api.
        The consequences of using the kthread api are that RLIMITs don't work
        correctly as they are inherited from khtreadd. This leads to bugs
        where more workers are created than would be allowed by the RLIMITs of
        the userspace process in lieu of which workers are created.
      
        Problems like this disappear with user workers created from the
        userspace processes for which they perform the work. In addition,
        providing this api allows vhost to remove additional complexity. For
        example, cgroup and mm sharing will just work out of the box with user
        workers based on the relevant userspace process instead of manually
        ensuring the correct cgroup and mm contexts are used.
      
        So the vhost subsystem should simply be made to use the same mechanism
        as io_uring. To this end the original mechanism used for
        create_io_thread() is generalized into user workers:
      
         - Introduce PF_USER_WORKER as a generic indicator that a given task
           is a user worker, i.e., a kernel task that was created from a
           userspace process. Now a PF_IO_WORKER thread is just a specialized
           version of PF_USER_WORKER. So io_uring io workers raise both flags.
      
         - Make copy_process() available to core kernel code
      
         - Extend struct kernel_clone_args with the following bitfields
           allowing to indicate to copy_process():
             - to create a user worker (raise PF_USER_WORKER)
             - to not inherit any files from the userspace process
             - to ignore signals
      
        After all generic changes are in place the vhost subsystem implements
        a new dedicated vhost api based on user workers. Finally, vhost is
        switched to rely on the new api moving it off of kthreads.
      
        Thanks to Mike for sticking it out and making it through this rather
        arduous journey"
      
      * tag 'v6.4/kernel.user_worker' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux:
        vhost: use vhost_tasks for worker threads
        vhost: move worker thread fields to new struct
        vhost_task: Allow vhost layer to use copy_process
        fork: allow kernel code to call copy_process
        fork: Add kernel_clone_args flag to ignore signals
        fork: add kernel_clone_args flag to not dup/clone files
        fork/vm: Move common PF_IO_WORKER behavior to new flag
        kernel: Make io_thread and kthread bit fields
        kthread: Pass in the thread's name during creation
        kernel: Allow a kernel thread's name to be set in copy_process
        csky: Remove kernel_thread declaration
      3323ddce
    • Linus Torvalds's avatar
      Merge tag 'v6.4/kernel.clone3.tests' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux · a632b76b
      Linus Torvalds authored
      Pull clone3 selftest fix from Christian Brauner:
       "This is a single fix to the clone3() selftstests.
      
        It fell through the sefltest tree cracks a few times so I'll provide
        it here. It has low urgency but we should still correctly report the
        number of tests"
      
      * tag 'v6.4/kernel.clone3.tests' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux:
        selftests/clone3: fix number of tests in ksft_set_plan
      a632b76b
    • Linus Torvalds's avatar
      Merge tag 'docs-6.4' of git://git.lwn.net/linux · c23f2897
      Linus Torvalds authored
      Pull documentation updates from Jonathan Corbet:
       "Commit volume in documentation is relatively low this time, but there
        is still a fair amount going on, including:
      
         - Reorganize the architecture-specific documentation under
           Documentation/arch
      
           This makes the structure match the source directory and helps to
           clean up the mess that is the top-level Documentation directory a
           bit. This work creates the new directory and moves x86 and most of
           the less-active architectures there.
      
           The current plan is to move the rest of the architectures in 6.5,
           with the patches going through the appropriate subsystem trees.
      
         - Some more Spanish translations and maintenance of the Italian
           translation
      
         - A new "Kernel contribution maturity model" document from Ted
      
         - A new tutorial on quickly building a trimmed kernel from Thorsten
      
        Plus the usual set of updates and fixes"
      
      * tag 'docs-6.4' of git://git.lwn.net/linux: (47 commits)
        media: Adjust column width for pdfdocs
        media: Fix building pdfdocs
        docs: clk: add documentation to log which clocks have been disabled
        docs: trace: Fix typo in ftrace.rst
        Documentation/process: always CC responsible lists
        docs: kmemleak: adjust to config renaming
        ELF: document some de-facto PT_* ABI quirks
        Documentation: arm: remove stih415/stih416 related entries
        docs: turn off "smart quotes" in the HTML build
        Documentation: firmware: Clarify firmware path usage
        docs/mm: Physical Memory: Fix grammar
        Documentation: Add document for false sharing
        dma-api-howto: typo fix
        docs: move m68k architecture documentation under Documentation/arch/
        docs: move parisc documentation under Documentation/arch/
        docs: move ia64 architecture docs under Documentation/arch/
        docs: Move arc architecture docs under Documentation/arch/
        docs: move nios2 documentation under Documentation/arch/
        docs: move openrisc documentation under Documentation/arch/
        docs: move superh documentation under Documentation/arch/
        ...
      c23f2897
    • Linus Torvalds's avatar
      Merge tag 'linux-kselftest-kunit-6.4-rc1' of... · 1be89faa
      Linus Torvalds authored
      Merge tag 'linux-kselftest-kunit-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest
      
      Pull KUnit updates from Shuah Khan:
      
       - several fixes to kunit tool
      
       - new klist structure test
      
       - support for m68k under QEMU
      
       - support for overriding the QEMU serial port
      
       - support for SH under QEMU
      
      * tag 'linux-kselftest-kunit-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
        kunit: add tests for using current KUnit test field
        kunit: tool: Add support for SH under QEMU
        kunit: tool: Add support for overriding the QEMU serial port
        .gitignore: Unignore .kunitconfig
        list: test: Test the klist structure
        kunit: increase KUNIT_LOG_SIZE to 2048 bytes
        kunit: Use gfp in kunit_alloc_resource() kernel-doc
        kunit: tool: fix pre-existing `mypy --strict` errors and update run_checks.py
        kunit: tool: remove unused imports and variables
        kunit: tool: add subscripts for type annotations where appropriate
        kunit: fix bug of extra newline characters in debugfs logs
        kunit: fix bug in the order of lines in debugfs logs
        kunit: fix bug in debugfs logs of parameterized tests
        kunit: tool: Add support for m68k under QEMU
      1be89faa
    • Linus Torvalds's avatar
      Merge tag 'linux-kselftest-next-6.4-rc1' of... · 0f50767d
      Linus Torvalds authored
      Merge tag 'linux-kselftest-next-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest
      
      Pull Kselftest updates from Shuah Khan:
      
       - several patches to enhance and fix resctrl test
      
       - nolibc support for kselftest with an addition to vprintf() to
         tools/nolibc/stdio and related test changes
      
       - Refactor 'peeksiginfo' ptrace test part
      
       - add 'malloc' failures checks in cgroup test_memcontrol
      
       - a new prctl test
      
       - enhancements sched test with additional ore schedule prctl calls
      
      * tag 'linux-kselftest-next-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: (25 commits)
        selftests/resctrl: Fix incorrect error return on test complete
        selftests/resctrl: Remove duplicate codes that clear each test result file
        selftests/resctrl: Commonize the signal handler register/unregister for all tests
        selftests/resctrl: Cleanup properly when an error occurs in CAT test
        selftests/resctrl: Flush stdout file buffer before executing fork()
        selftests/resctrl: Return MBA check result and make it to output message
        selftests/resctrl: Fix set up schemata with 100% allocation on first run in MBM test
        selftests/resctrl: Use correct exit code when tests fail
        kselftest/arm64: Convert za-fork to use kselftest.h
        kselftest: Support nolibc
        tools/nolibc/stdio: Implement vprintf()
        selftests/resctrl: Correct get_llc_perf() param in function comment
        selftests/resctrl: Use remount_resctrlfs() consistently with boolean
        selftests/resctrl: Change name from CBM_MASK_PATH to INFO_PATH
        selftests/resctrl: Change initialize_llc_perf() return type to void
        selftests/resctrl: Replace obsolete memalign() with posix_memalign()
        selftests/resctrl: Check for return value after write_schemata()
        selftests/resctrl: Allow ->setup() to return errors
        selftests/resctrl: Move ->setup() call outside of test specific branches
        selftests/resctrl: Return NULL if malloc_and_init_memory() did not alloc mem
        ...
      0f50767d
    • Linus Torvalds's avatar
      Merge tag 'rcu.6.4.april5.2023.3' of git://git.kernel.org/pub/scm/linux/kernel/git/jfern/linux · 5dfb75e8
      Linus Torvalds authored
      Pull RCU updates from Joel Fernandes:
      
       - Updates and additions to MAINTAINERS files, with Boqun being added to
         the RCU entry and Zqiang being added as an RCU reviewer.
      
         I have also transitioned from reviewer to maintainer; however, Paul
         will be taking over sending RCU pull-requests for the next merge
         window.
      
       - Resolution of hotplug warning in nohz code, achieved by fixing
         cpu_is_hotpluggable() through interaction with the nohz subsystem.
      
         Tick dependency modifications by Zqiang, focusing on fixing usage of
         the TICK_DEP_BIT_RCU_EXP bitmask.
      
       - Avoid needless calls to the rcu-lazy shrinker for CONFIG_RCU_LAZY=n
         kernels, fixed by Zqiang.
      
       - Improvements to rcu-tasks stall reporting by Neeraj.
      
       - Initial renaming of k[v]free_rcu() to k[v]free_rcu_mightsleep() for
         increased robustness, affecting several components like mac802154,
         drbd, vmw_vmci, tracing, and more.
      
         A report by Eric Dumazet showed that the API could be unknowingly
         used in an atomic context, so we'd rather make sure they know what
         they're asking for by being explicit:
      
            https://lore.kernel.org/all/20221202052847.2623997-1-edumazet@google.com/
      
       - Documentation updates, including corrections to spelling,
         clarifications in comments, and improvements to the srcu_size_state
         comments.
      
       - Better srcu_struct cache locality for readers, by adjusting the size
         of srcu_struct in support of SRCU usage by Christoph Hellwig.
      
       - Teach lockdep to detect deadlocks between srcu_read_lock() vs
         synchronize_srcu() contributed by Boqun.
      
         Previously lockdep could not detect such deadlocks, now it can.
      
       - Integration of rcutorture and rcu-related tools, targeted for v6.4
         from Boqun's tree, featuring new SRCU deadlock scenarios, test_nmis
         module parameter, and more
      
       - Miscellaneous changes, various code cleanups and comment improvements
      
      * tag 'rcu.6.4.april5.2023.3' of git://git.kernel.org/pub/scm/linux/kernel/git/jfern/linux: (71 commits)
        checkpatch: Error out if deprecated RCU API used
        mac802154: Rename kfree_rcu() to kvfree_rcu_mightsleep()
        rcuscale: Rename kfree_rcu() to kfree_rcu_mightsleep()
        ext4/super: Rename kfree_rcu() to kfree_rcu_mightsleep()
        net/mlx5: Rename kfree_rcu() to kfree_rcu_mightsleep()
        net/sysctl: Rename kvfree_rcu() to kvfree_rcu_mightsleep()
        lib/test_vmalloc.c: Rename kvfree_rcu() to kvfree_rcu_mightsleep()
        tracing: Rename kvfree_rcu() to kvfree_rcu_mightsleep()
        misc: vmw_vmci: Rename kvfree_rcu() to kvfree_rcu_mightsleep()
        drbd: Rename kvfree_rcu() to kvfree_rcu_mightsleep()
        rcu: Protect rcu_print_task_exp_stall() ->exp_tasks access
        rcu: Avoid stack overflow due to __rcu_irq_enter_check_tick() being kprobe-ed
        rcu-tasks: Report stalls during synchronize_srcu() in rcu_tasks_postscan()
        rcu: Permit start_poll_synchronize_rcu_expedited() to be invoked early
        rcu: Remove never-set needwake assignment from rcu_report_qs_rdp()
        rcu: Register rcu-lazy shrinker only for CONFIG_RCU_LAZY=y kernels
        rcu: Fix missing TICK_DEP_MASK_RCU_EXP dependency check
        rcu: Fix set/clear TICK_DEP_BIT_RCU_EXP bitmask race
        rcu/trace: use strscpy() to instead of strncpy()
        tick/nohz: Fix cpu_is_hotpluggable() by checking with nohz subsystem
        ...
      5dfb75e8
    • Linus Torvalds's avatar
      Merge tag 'nolibc.2023.04.04a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu · 5d77652f
      Linus Torvalds authored
      Pull nolibc updates from Paul McKenney:
      
       - Add support for loongarch
      
       - Fix stack-protector issues
      
       - Support additional integral types and signal-related macros
      
       - Add support for stdin, stdout, and stderr
      
       - Add getuid() and geteuid()
      
       - Allow S_I* macros to be overridden by program
      
       - Defer to linux/fcntl.h and linux/stat.h to avoid duplicate
         definitions
      
       - Many improvements to the selftests
      
      * tag 'nolibc.2023.04.04a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu: (22 commits)
        tools/nolibc: x86_64: add stackprotector support
        tools/nolibc: i386: add stackprotector support
        tools/nolibc: tests: add test for -fstack-protector
        tools/nolibc: tests: fold in no-stack-protector cflags
        tools/nolibc: add support for stack protector
        tools/nolibc: tests: constify test_names
        tools/nolibc: add helpers for wait() signal exits
        tools/nolibc: add definitions for standard fds
        selftests/nolibc: Adjust indentation for Makefile
        selftests/nolibc: Add support for LoongArch
        tools/nolibc: Add support for LoongArch
        tools/nolibc: Add statx() and make stat() rely on statx() if necessary
        tools/nolibc: Include linux/fcntl.h and remove duplicate code
        tools/nolibc: check for S_I* macros before defining them
        selftests/nolibc: skip the chroot_root and link_dir tests when not privileged
        tools/nolibc: add getuid() and geteuid()
        tools/nolibc: add tests for the integer limits in stdint.h
        tools/nolibc: enlarge column width of tests
        tools/nolibc: add integer types and integer limit macros
        tools/nolibc: add stdint.h
        ...
      5d77652f
    • Linus Torvalds's avatar
      Merge tag 'locktorture.2023.04.04a' of... · 4a4075ad
      Linus Torvalds authored
      Merge tag 'locktorture.2023.04.04a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu
      
      Pull locktorture updates from Paul McKenney:
       "This adds tests for nested locking and also adds support for testing
        raw spinlocks in PREEMPT_RT kernels"
      
      * tag 'locktorture.2023.04.04a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu:
        locktorture: Add raw_spinlock* torture tests for PREEMPT_RT kernels
        locktorture: With nested locks, occasionally skip main lock
        locktorture: Add nested locking to rtmutex torture tests
        locktorture: Add nested locking to mutex torture tests
        locktorture: Add nested_[un]lock() hooks and nlocks parameter
      4a4075ad
    • Linus Torvalds's avatar
      Merge tag 'lkmm-scripting.2023.04.07a' of... · 60eb4507
      Linus Torvalds authored
      Merge tag 'lkmm-scripting.2023.04.07a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu
      
      Pull Linux Kernel Memory Model scripting updates from Paul McKenney:
       "This improves litmus-test documentation and improves the ability to do
        before/after tests on the https://github.com/paulmckrcu/litmus repo"
      
      * tag 'lkmm-scripting.2023.04.07a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu: (32 commits)
        tools/memory-model: Remove out-of-date SRCU documentation
        tools/memory-model: Document LKMM test procedure
        tools/memory-model: Use "grep -E" instead of "egrep"
        tools/memory-model: Use "-unroll 0" to keep --hw runs finite
        tools/memory-model: Make judgelitmus.sh handle scripted Result: tag
        tools/memory-model: Add data-race capabilities to judgelitmus.sh
        tools/memory-model: Add checktheselitmus.sh to run specified litmus tests
        tools/memory-model: Repair parseargs.sh header comment
        tools/memory-model:  Add "--" to parseargs.sh for additional arguments
        tools/memory-model: Make history-check scripts use mselect7
        tools/memory-model: Make checkghlitmus.sh use mselect7
        tools/memory-model: Fix scripting --jobs argument
        tools/memory-model: Implement --hw support for checkghlitmus.sh
        tools/memory-model: Add -v flag to jingle7 runs
        tools/memory-model: Make runlitmus.sh check for jingle errors
        tools/memory-model: Allow herd to deduce CPU type
        tools/memory-model: Keep assembly-language litmus tests
        tools/memory-model: Move from .AArch64.litmus.out to .litmus.AArch.out
        tools/memory-model: Make runlitmus.sh generate .litmus.out for --hw
        tools/memory-model: Split runlitmus.sh out of checklitmus.sh
        ...
      60eb4507
    • Linus Torvalds's avatar
      Merge tag 'lkmm.2023.04.07a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu · 40603735
      Linus Torvalds authored
      Pull Linux Kernel Memory Model updates from Paul McKenney
       "This improves LKMM diagnostic messages, unifies handling of the
        ordering produced by unlock/lock pairs, adds support for the
        smp_mb__after_srcu_read_unlock() macro, removes redundant members from
        the to-r relation, brings SRCU read-side semantics into alignment with
        Linux-kernel SRCU, makes ppo a subrelation of po, and improves
        documentation"
      
      * tag 'lkmm.2023.04.07a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu:
        Documentation: litmus-tests: Correct spelling
        tools/memory-model: Add documentation about SRCU read-side critical sections
        tools/memory-model: Make ppo a subrelation of po
        tools/memory-model: Provide exact SRCU semantics
        tools/memory-model: Restrict to-r to read-read address dependency
        tools/memory-model: Add smp_mb__after_srcu_read_unlock()
        tools/memory-model: Unify UNLOCK+LOCK pairings to po-unlock-lock-po
        tools/memory-model: Update some warning labels
      40603735
    • Linus Torvalds's avatar
      Merge tag 'kcsan.2023.04.04a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu · 022e3209
      Linus Torvalds authored
      Pull KCSAN updates from Paul McKenney:
       "Kernel concurrency sanitizer (KCSAN) updates for v6.4
      
        This fixes kernel-doc warnings and also updates instrumentation from
        READ_ONCE() to volatile in order to avoid unaligned load-acquire
        instructions on arm64 in kernels built with LTO"
      
      * tag 'kcsan.2023.04.04a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu:
        kcsan: Avoid READ_ONCE() in read_instrumented_memory()
        instrumented.h: Fix all kernel-doc format warnings
      022e3209
    • Linus Torvalds's avatar
      Merge tag 'tpmdd-v6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd · 1a0beef9
      Linus Torvalds authored
      Pull tpm updates from Jarkko Sakkinen:
      
       - The .machine keyring, used for Machine Owner Keys (MOK), acquired the
         ability to store only CA enforced keys, and put rest to the .platform
         keyring, thus separating the code signing keys from the keys that are
         used to sign certificates.
      
         This essentially unlocks the use of the .machine keyring as a trust
         anchor for IMA. It is an opt-in feature, meaning that the additional
         contraints won't brick anyone who does not care about them.
      
       - Enable interrupt based transactions with discrete TPM chips (tpm_tis).
      
         There was code for this existing but it never really worked so I
         consider this a new feature rather than a bug fix. Before the driver
         just fell back to the polling mode.
      
      Link: https://lore.kernel.org/linux-integrity/a93b6222-edda-d43c-f010-a59701f2aeef@gmx.de/
      Link: https://lore.kernel.org/linux-integrity/20230302164652.83571-1-eric.snowberg@oracle.com/
      
      * tag 'tpmdd-v6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd: (29 commits)
        tpm: Add !tpm_amd_is_rng_defective() to the hwrng_unregister() call site
        tpm_tis: fix stall after iowrite*()s
        tpm/tpm_tis_synquacer: Convert to platform remove callback returning void
        tpm/tpm_tis: Convert to platform remove callback returning void
        tpm/tpm_ftpm_tee: Convert to platform remove callback returning void
        tpm: tpm_tis_spi: Mark ACPI and OF related data as maybe unused
        tpm: st33zp24: Mark ACPI and OF related data as maybe unused
        tpm, tpm_tis: Enable interrupt test
        tpm, tpm_tis: startup chip before testing for interrupts
        tpm, tpm_tis: Claim locality when interrupts are reenabled on resume
        tpm, tpm_tis: Claim locality in interrupt handler
        tpm, tpm_tis: Request threaded interrupt handler
        tpm, tpm: Implement usage counter for locality
        tpm, tpm_tis: do not check for the active locality in interrupt handler
        tpm, tpm_tis: Move interrupt mask checks into own function
        tpm, tpm_tis: Only handle supported interrupts
        tpm, tpm_tis: Claim locality before writing interrupt registers
        tpm, tpm_tis: Do not skip reset of original interrupt vector
        tpm, tpm_tis: Disable interrupts if tpm_tis_probe_irq() failed
        tpm, tpm_tis: Claim locality before writing TPM_INT_ENABLE register
        ...
      1a0beef9
    • Linus Torvalds's avatar
      Merge tag 'Smack-for-6.4' of https://github.com/cschaufler/smack-next · dc7e22a3
      Linus Torvalds authored
      Pull smack updates from Casey Schaufler:
       "There are two changes, one small and one more substantial:
      
         - Remove of an unnecessary cast
      
         - The mount option processing introduced with the mount rework makes
           copies of mount option values. There is no good reason to make
           copies of Smack labels, as they are maintained on a list and never
           removed.
      
           The code now uses pointers to entries on the list, reducing
           processing time and memory use"
      
      * tag 'Smack-for-6.4' of https://github.com/cschaufler/smack-next:
        Smack: Improve mount process memory use
        smack_lsm: remove unnecessary type casting
      dc7e22a3
    • Linus Torvalds's avatar
      Merge tag 'landlock-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/mic/linux · 62443646
      Linus Torvalds authored
      Pull landlock update from Mickaël Salaün:
       "Improve user space documentation"
      
      * tag 'landlock-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/mic/linux:
        landlock: Clarify documentation for the LANDLOCK_ACCESS_FS_REFER right
      62443646
    • Linus Torvalds's avatar
      Merge tag 'tomoyo-pr-20230424' of git://git.osdn.net/gitroot/tomoyo/tomoyo-test1 · 5af4b523
      Linus Torvalds authored
      Pull tomoyo update from Tetsuo Handa:
       "One cleanup patch from Vlastimil Babka"
      
      * tag 'tomoyo-pr-20230424' of git://git.osdn.net/gitroot/tomoyo/tomoyo-test1:
        tomoyo: replace tomoyo_round2() with kmalloc_size_roundup()
      5af4b523
    • Linus Torvalds's avatar
      Merge tag 'lsm-pr-20230420' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/lsm · 08e30833
      Linus Torvalds authored
      Pull lsm updates from Paul Moore:
      
       - Move the LSM hook comment blocks into security/security.c
      
         For many years the LSM hook comment blocks were located in a very odd
         place, include/linux/lsm_hooks.h, where they lived on their own,
         disconnected from both the function prototypes and definitions.
      
         In keeping with current kernel conventions, this moves all of these
         comment blocks to the top of the function definitions, transforming
         them into the kdoc format in the process. This should make it much
         easier to maintain these comments, which are the main source of LSM
         hook documentation.
      
         For the most part the comment contents were left as-is, although some
         glaring errors were corrected. Expect additional edits in the future
         as we slowly update and correct the comment blocks.
      
         This is the bulk of the diffstat.
      
       - Introduce LSM_ORDER_LAST
      
         Similar to how LSM_ORDER_FIRST is used to specify LSMs which should
         be ordered before "normal" LSMs, the LSM_ORDER_LAST is used to
         specify LSMs which should be ordered after "normal" LSMs.
      
         This is one of the prerequisites for transitioning IMA/EVM to a
         proper LSM.
      
       - Remove the security_old_inode_init_security() hook
      
         The security_old_inode_init_security() LSM hook only allows for a
         single xattr which is problematic both for LSM stacking and the
         IMA/EVM-as-a-LSM effort. This finishes the conversion over to the
         security_inode_init_security() hook and removes the single-xattr LSM
         hook.
      
       - Fix a reiserfs problem with security xattrs
      
         During the security_old_inode_init_security() removal work it became
         clear that reiserfs wasn't handling security xattrs properly so we
         fixed it.
      
      * tag 'lsm-pr-20230420' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/lsm: (32 commits)
        reiserfs: Add security prefix to xattr name in reiserfs_security_write()
        security: Remove security_old_inode_init_security()
        ocfs2: Switch to security_inode_init_security()
        reiserfs: Switch to security_inode_init_security()
        security: Remove integrity from the LSM list in Kconfig
        Revert "integrity: double check iint_cache was initialized"
        security: Introduce LSM_ORDER_LAST and set it for the integrity LSM
        device_cgroup: Fix typo in devcgroup_css_alloc description
        lsm: fix a badly named parameter in security_get_getsecurity()
        lsm: fix doc warnings in the LSM hook comments
        lsm: styling fixes to security/security.c
        lsm: move the remaining LSM hook comments to security/security.c
        lsm: move the io_uring hook comments to security/security.c
        lsm: move the perf hook comments to security/security.c
        lsm: move the bpf hook comments to security/security.c
        lsm: move the audit hook comments to security/security.c
        lsm: move the binder hook comments to security/security.c
        lsm: move the sysv hook comments to security/security.c
        lsm: move the key hook comments to security/security.c
        lsm: move the xfrm hook comments to security/security.c
        ...
      08e30833
    • Linus Torvalds's avatar
      Merge tag 'selinux-pr-20230420' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux · 72eaa096
      Linus Torvalds authored
      Pull selinux updates from Paul Moore:
      
       - Stop passing the 'selinux_state' pointers as function arguments
      
         As discussed during the end of the last development cycle, passing a
         selinux_state pointer through the SELinux code has a noticeable
         impact on performance, and with the current code it is not strictly
         necessary.
      
         This simplifies things by referring directly to the single
         selinux_state global variable which should help improve SELinux
         performance.
      
       - Uninline the unlikely portions of avc_has_perm_noaudit()
      
         This change was also based on a discussion from the last development
         cycle, and is heavily based on an initial proof of concept patch from
         you. The core issue was that avc_has_perm_noaudit() was not able to
         be inlined, as intended, due to its size. We solved this issue by
         extracting the less frequently hit portions of avc_has_perm_noaudit()
         into a separate function, reducing the size of avc_has_perm_noaudit()
         to the point where the compiler began inlining the function. We also
         took the opportunity to clean up some ugly RCU locking in the code
         that became uglier with the change.
      
       - Remove the runtime disable functionality
      
         After several years of work by the userspace and distro folks, we are
         finally in a place where we feel comfortable removing the runtime
         disable functionality which we initially deprecated at the start of
         2020.
      
         There is plenty of information in the kernel's deprecation (now
         removal) notice, but the main motivation was to be able to safely
         mark the LSM hook structures as '__ro_after_init'.
      
         LWN also wrote a good summary of the deprecation this morning which
         offers a more detailed history:
      
              https://lwn.net/SubscriberLink/927463/dcfa0d4ed2872f03
      
       - Remove the checkreqprot functionality
      
         The original checkreqprot deprecation notice stated that the removal
         would happen no sooner than June 2021, which means this falls hard
         into the "better late than never" bucket.
      
         The Kconfig and deprecation notice has more detail on this setting,
         but the basic idea is that we want to ensure that the SELinux policy
         allows for the memory protections actually applied by the kernel, and
         not those requested by the process.
      
         While we haven't found anyone running a supported distro that is
         affected by this deprecation/removal, anyone who is affected would
         only need to update their policy to reflect the reality of their
         applications' mapping protections.
      
       - Minor Makefile improvements
      
         Some minor Makefile improvements to correct some dependency issues
         likely only ever seen by SELinux developers. I expect we will have at
         least one more tweak to the Makefile during the next merge window,
         but it didn't quite make the cutoff this time around.
      
      * tag 'selinux-pr-20230420' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux:
        selinux: ensure av_permissions.h is built when needed
        selinux: fix Makefile dependencies of flask.h
        selinux: stop returning node from avc_insert()
        selinux: clean up dead code after removing runtime disable
        selinux: update the file list in MAINTAINERS
        selinux: remove the runtime disable functionality
        selinux: remove the 'checkreqprot' functionality
        selinux: stop passing selinux_state pointers and their offspring
        selinux: uninline unlikely parts of avc_has_perm_noaudit()
      72eaa096
    • Linus Torvalds's avatar
      Merge branch 'x86-rep-insns': x86 user copy clarifications · a5624566
      Linus Torvalds authored
      Merge my x86 user copy updates branch.
      
      This cleans up a lot of our x86 memory copy code, particularly for user
      accesses.  I've been pushing for microarchitectural support for good
      memory copying and clearing for a long while, and it's been visible in
      how the kernel has aggressively used 'rep movs' and 'rep stos' whenever
      possible.
      
      And that micro-architectural support has been improving over the years,
      to the point where on modern CPU's the best option for a memory copy
      that would become a function call (as opposed to being something that
      can just be turned into individual 'mov' instructions) is now to inline
      the string instruction sequence instead.
      
      However, that only makes sense when we have the modern markers for this:
      the x86 FSRM and FSRS capabilities ("Fast Short REP MOVS/STOS").
      
      So this cleans up a lot of our historical code, gets rid of the legacy
      marker use ("REP_GOOD" and "ERMS") from the memcpy/memset cases, and
      replaces it with that modern reality.  Note that REP_GOOD and ERMS end
      up still being used by the known large cases (ie page copyin gand
      clearing).
      
      The reason much of this ends up being about user memory accesses is that
      the normal in-kernel cases are done by the compiler (__builtin_memcpy()
      and __builtin_memset()) and getting to the point where we can use our
      instruction rewriting to inline those to be string instructions will
      need some compiler support.
      
      In contrast, the user accessor functions are all entirely controlled by
      the kernel code, so we can change those arbitrarily.
      
      Thanks to Borislav Petkov for feedback on the series, and Jens testing
      some of this on micro-architectures I didn't personally have access to.
      
      * x86-rep-insns:
        x86: rewrite '__copy_user_nocache' function
        x86: remove 'zerorest' argument from __copy_user_nocache()
        x86: set FSRS automatically on AMD CPUs that have FSRM
        x86: improve on the non-rep 'copy_user' function
        x86: improve on the non-rep 'clear_user' function
        x86: inline the 'rep movs' in user copies for the FSRM case
        x86: move stac/clac from user copy routines into callers
        x86: don't use REP_GOOD or ERMS for user memory clearing
        x86: don't use REP_GOOD or ERMS for user memory copies
        x86: don't use REP_GOOD or ERMS for small memory clearing
        x86: don't use REP_GOOD or ERMS for small memory copies
      a5624566
    • Linus Torvalds's avatar
      iov: improve copy_iovec_from_user() code generation · 487c20b0
      Linus Torvalds authored
      Use the same pattern as the compat version of this code does: instead of
      copying the whole array to a kernel buffer and then having a separate
      phase of verifying it, just do it one entry at a time, verifying as you
      go.
      
      On Jens' /dev/zero readv() test this improves performance by ~6%.
      
      [ This was obviously triggered by Jens' ITER_UBUF updates series ]
      Reported-and-tested-by: default avatarJens Axboe <axboe@kernel.dk>
      Link: https://lore.kernel.org/all/de35d11d-bce7-e976-7372-1f2caf417103@kernel.dk/Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      487c20b0
    • Linus Torvalds's avatar
      Merge tag 'iter-ubuf.2-2023-04-21' of git://git.kernel.dk/linux · b9dff219
      Linus Torvalds authored
      Pull ITER_UBUF updates from Jens Axboe:
       "This turns singe vector imports into ITER_UBUF, rather than
        ITER_IOVEC.
      
        The former is more trivial to iterate and advance, and hence a bit
        more efficient. From some very unscientific testing, ~60% of all iovec
        imports are single vector"
      
      * tag 'iter-ubuf.2-2023-04-21' of git://git.kernel.dk/linux:
        iov_iter: Mark copy_compat_iovec_from_user() noinline
        iov_iter: import single vector iovecs as ITER_UBUF
        iov_iter: convert import_single_range() to ITER_UBUF
        iov_iter: overlay struct iovec and ubuf/len
        iov_iter: set nr_segs = 1 for ITER_UBUF
        iov_iter: remove iov_iter_iovec()
        iov_iter: add iter_iov_addr() and iter_iov_len() helpers
        ALSA: pcm: check for user backed iterator, not specific iterator type
        IB/qib: check for user backed iterator, not specific iterator type
        IB/hfi1: check for user backed iterator, not specific iterator type
        iov_iter: add iter_iovec() helper
        block: ensure bio_alloc_map_data() deals with ITER_UBUF correctly
      b9dff219
    • Linus Torvalds's avatar
      Merge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm · d88867a2
      Linus Torvalds authored
      Pull ARM development updates from Russell King:
       "Four changes for v6.4:
      
         - simplify the path to the top vmlinux
      
         - three patches to fix vfp with instrumentation enabled (eg lockdep)"
      
      * tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm:
        ARM: 9294/2: vfp: Fix broken softirq handling with instrumentation enabled
        ARM: 9293/1: vfp: Pass successful return address via register R3
        ARM: 9292/1: vfp: Pass thread_info pointer to vfp_support_entry
        ARM: 9291/1: decompressor: simplify the path to the top vmlinux
      d88867a2
    • Ruihan Li's avatar
      scripts: Remove ICC-related dead code · 1a261a6e
      Ruihan Li authored
      Intel compiler support has already been completely removed in commit
      95207db8 ("Remove Intel compiler support").  However, it appears
      that there is still some ICC-related code in scripts/cc-version.sh.
      There is no harm in leaving the code as it is, but removing the dead
      code makes the codebase a bit cleaner.
      
      Hopefully all ICC-related stuff in the build scripts will be removed
      after this commit, given the grep output as below:
      
      	(linux/scripts) $ grep -i -w -R 'icc'
      	cc-version.sh:ICC)
      	cc-version.sh:	min_version=$($min_tool_version icc)
      	dtc/include-prefixes/arm64/qcom/sm6350.dtsi:#include <dt-bindings/interconnect/qcom,icc.h>
      
      Fixes: 95207db8 ("Remove Intel compiler support")
      Signed-off-by: default avatarRuihan Li <lrh2000@pku.edu.cn>
      Reviewed-by: default avatarNick Desaulniers <ndesaulniers@google.com>
      Reviewed-by: default avatarNathan Chancellor <nathan@kernel.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      1a261a6e
    • Jarkko Sakkinen's avatar
      tpm: Add !tpm_amd_is_rng_defective() to the hwrng_unregister() call site · bd8621ca
      Jarkko Sakkinen authored
      The following crash was reported:
      
      [ 1950.279393] list_del corruption, ffff99560d485790->next is NULL
      [ 1950.279400] ------------[ cut here ]------------
      [ 1950.279401] kernel BUG at lib/list_debug.c:49!
      [ 1950.279405] invalid opcode: 0000 [#1] PREEMPT SMP NOPTI
      [ 1950.279407] CPU: 11 PID: 5886 Comm: modprobe Tainted: G O 6.2.8_1 #1
      [ 1950.279409] Hardware name: Gigabyte Technology Co., Ltd. B550M AORUS PRO-P/B550M AORUS PRO-P,
      BIOS F15c 05/11/2022
      [ 1950.279410] RIP: 0010:__list_del_entry_valid+0x59/0xc0
      [ 1950.279415] Code: 48 8b 01 48 39 f8 75 5a 48 8b 72 08 48 39 c6 75 65 b8 01 00 00 00 c3 cc cc cc
      cc 48 89 fe 48 c7 c7 08 a8 13 9e e8 b7 0a bc ff <0f> 0b 48 89 fe 48 c7 c7 38 a8 13 9e e8 a6 0a bc
      ff 0f 0b 48 89 fe
      [ 1950.279416] RSP: 0018:ffffa96d05647e08 EFLAGS: 00010246
      [ 1950.279418] RAX: 0000000000000033 RBX: ffff99560d485750 RCX: 0000000000000000
      [ 1950.279419] RDX: 0000000000000000 RSI: ffffffff9e107c59 RDI: 00000000ffffffff
      [ 1950.279420] RBP: ffffffffc19c5168 R08: 0000000000000000 R09: ffffa96d05647cc8
      [ 1950.279421] R10: 0000000000000003 R11: ffffffff9ea2a568 R12: 0000000000000000
      [ 1950.279422] R13: ffff99560140a2e0 R14: ffff99560127d2e0 R15: 0000000000000000
      [ 1950.279422] FS: 00007f67da795380(0000) GS:ffff995d1f0c0000(0000) knlGS:0000000000000000
      [ 1950.279424] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
      [ 1950.279424] CR2: 00007f67da7e65c0 CR3: 00000001feed2000 CR4: 0000000000750ee0
      [ 1950.279426] PKRU: 55555554
      [ 1950.279426] Call Trace:
      [ 1950.279428] <TASK>
      [ 1950.279430] hwrng_unregister+0x28/0xe0 [rng_core]
      [ 1950.279436] tpm_chip_unregister+0xd5/0xf0 [tpm]
      
      Add the forgotten !tpm_amd_is_rng_defective() invariant to the
      hwrng_unregister() call site inside tpm_chip_unregister().
      
      Cc: stable@vger.kernel.org
      Reported-by: default avatarMartin Dimov <martin@dmarto.com>
      Link: https://lore.kernel.org/linux-integrity/3d1d7e9dbfb8c96125bc93b6b58b90a7@dmarto.com/
      Fixes: f1324bbc ("tpm: disable hwrng for fTPM on some AMD designs")
      Fixes: b006c439 ("hwrng: core - start hwrng kthread also for untrusted sources")
      Tested-by: default avatarMartin Dimov <martin@dmarto.com>
      Signed-off-by: default avatarJarkko Sakkinen <jarkko@kernel.org>
      bd8621ca
    • Haris Okanovic's avatar
      tpm_tis: fix stall after iowrite*()s · 77218e83
      Haris Okanovic authored
      ioread8() operations to TPM MMIO addresses can stall the CPU when
      immediately following a sequence of iowrite*()'s to the same region.
      
      For example, cyclitest measures ~400us latency spikes when a non-RT
      usermode application communicates with an SPI-based TPM chip (Intel Atom
      E3940 system, PREEMPT_RT kernel). The spikes are caused by a
      stalling ioread8() operation following a sequence of 30+ iowrite8()s to
      the same address. I believe this happens because the write sequence is
      buffered (in CPU or somewhere along the bus), and gets flushed on the
      first LOAD instruction (ioread*()) that follows.
      
      The enclosed change appears to fix this issue: read the TPM chip's
      access register (status code) after every iowrite*() operation to
      amortize the cost of flushing data to chip across multiple instructions.
      Signed-off-by: default avatarHaris Okanovic <haris.okanovic@ni.com>
      Link: https://lore.kernel.org/r/20230323153436.B2SATnZV@linutronix.deSigned-off-by: default avatarSebastian Andrzej Siewior <bigeasy@linutronix.de>
      Tested-by: default avatarJarkko Sakkinen <jarkko@kernel.org>
      Reviewed-by: default avatarJarkko Sakkinen <jarkko@kernel.org>
      Signed-off-by: default avatarJarkko Sakkinen <jarkko@kernel.org>
      77218e83
    • Uwe Kleine-König's avatar
      tpm/tpm_tis_synquacer: Convert to platform remove callback returning void · 7b69ef62
      Uwe Kleine-König authored
      The .remove() callback for a platform driver returns an int which makes
      many driver authors wrongly assume it's possible to do error handling by
      returning an error code. However the value returned is (mostly) ignored
      and this typically results in resource leaks. To improve here there is a
      quest to make the remove callback return void. In the first step of this
      quest all drivers are converted to .remove_new() which already returns
      void.
      
      Trivially convert this driver from always returning zero in the remove
      callback to the void returning variant.
      Signed-off-by: default avatarUwe Kleine-König <u.kleine-koenig@pengutronix.de>
      Reviewed-by: default avatarJarkko Sakkinen <jarkko@kernel.org>
      Signed-off-by: default avatarJarkko Sakkinen <jarkko@kernel.org>
      7b69ef62
    • Uwe Kleine-König's avatar
      tpm/tpm_tis: Convert to platform remove callback returning void · c3da2c6e
      Uwe Kleine-König authored
      The .remove() callback for a platform driver returns an int which makes
      many driver authors wrongly assume it's possible to do error handling by
      returning an error code. However the value returned is (mostly) ignored
      and this typically results in resource leaks. To improve here there is a
      quest to make the remove callback return void. In the first step of this
      quest all drivers are converted to .remove_new() which already returns
      void.
      
      Trivially convert this driver from always returning zero in the remove
      callback to the void returning variant.
      Signed-off-by: default avatarUwe Kleine-König <u.kleine-koenig@pengutronix.de>
      Reviewed-by: default avatarJarkko Sakkinen <jarkko@kernel.org>
      Signed-off-by: default avatarJarkko Sakkinen <jarkko@kernel.org>
      c3da2c6e
    • Uwe Kleine-König's avatar
      tpm/tpm_ftpm_tee: Convert to platform remove callback returning void · bd883286
      Uwe Kleine-König authored
      The .remove() callback for a platform driver returns an int which makes
      many driver authors wrongly assume it's possible to do error handling by
      returning an error code. However the value returned is (mostly) ignored
      and this typically results in resource leaks. To improve here there is a
      quest to make the remove callback return void. In the first step of this
      quest all drivers are converted to .remove_new() which already returns
      void.
      
      ftpm_tee_remove() returns zero unconditionally (and cannot easily
      converted to return void). So ignore the return value to be able to make
      ftpm_plat_tee_remove() return void.
      Signed-off-by: default avatarUwe Kleine-König <u.kleine-koenig@pengutronix.de>
      Reviewed-by: default avatarJarkko Sakkinen <jarkko@kernel.org>
      Signed-off-by: default avatarJarkko Sakkinen <jarkko@kernel.org>
      bd883286