1. 24 May, 2023 2 commits
  2. 19 May, 2023 5 commits
    • Will Deacon's avatar
      KVM: arm64: Prevent unconditional donation of unmapped regions from the host · 09cce60b
      Will Deacon authored
      Since host stage-2 mappings are created lazily, we cannot rely solely on
      the pte in order to recover the target physical address when checking a
      host-initiated memory transition as this permits donation of unmapped
      regions corresponding to MMIO or "no-map" memory.
      
      Instead of inspecting the pte, move the addr_is_allowed_memory() check
      into the host callback function where it is passed the physical address
      directly from the walker.
      
      Cc: Quentin Perret <qperret@google.com>
      Fixes: e82edcc7 ("KVM: arm64: Implement do_share() helper for sharing memory")
      Signed-off-by: default avatarWill Deacon <will@kernel.org>
      Signed-off-by: default avatarMarc Zyngier <maz@kernel.org>
      Link: https://lore.kernel.org/r/20230518095844.1178-1-will@kernel.org
      09cce60b
    • Jean-Philippe Brucker's avatar
      KVM: arm64: vgic: Fix a comment · 62548732
      Jean-Philippe Brucker authored
      It is host userspace, not the guest, that issues
      KVM_DEV_ARM_VGIC_GRP_CTRL
      Signed-off-by: default avatarJean-Philippe Brucker <jean-philippe@linaro.org>
      Reviewed-by: default avatarOliver Upton <oliver.upton@linux.dev>
      Signed-off-by: default avatarMarc Zyngier <maz@kernel.org>
      Link: https://lore.kernel.org/r/20230518100914.2837292-5-jean-philippe@linaro.org
      62548732
    • Jean-Philippe Brucker's avatar
      KVM: arm64: vgic: Fix locking comment · c38b8400
      Jean-Philippe Brucker authored
      It is now config_lock that must be held, not kvm lock. Replace the
      comment with a lockdep annotation.
      
      Fixes: f0032773 ("KVM: arm64: Use config_lock to protect vgic state")
      Signed-off-by: default avatarJean-Philippe Brucker <jean-philippe@linaro.org>
      Reviewed-by: default avatarOliver Upton <oliver.upton@linux.dev>
      Signed-off-by: default avatarMarc Zyngier <maz@kernel.org>
      Link: https://lore.kernel.org/r/20230518100914.2837292-4-jean-philippe@linaro.org
      c38b8400
    • Jean-Philippe Brucker's avatar
      KVM: arm64: vgic: Wrap vgic_its_create() with config_lock · 9cf2f840
      Jean-Philippe Brucker authored
      vgic_its_create() changes the vgic state without holding the
      config_lock, which triggers a lockdep warning in vgic_v4_init():
      
      [  358.667941] WARNING: CPU: 3 PID: 178 at arch/arm64/kvm/vgic/vgic-v4.c:245 vgic_v4_init+0x15c/0x7a8
      ...
      [  358.707410]  vgic_v4_init+0x15c/0x7a8
      [  358.708550]  vgic_its_create+0x37c/0x4a4
      [  358.709640]  kvm_vm_ioctl+0x1518/0x2d80
      [  358.710688]  __arm64_sys_ioctl+0x7ac/0x1ba8
      [  358.711960]  invoke_syscall.constprop.0+0x70/0x1e0
      [  358.713245]  do_el0_svc+0xe4/0x2d4
      [  358.714289]  el0_svc+0x44/0x8c
      [  358.715329]  el0t_64_sync_handler+0xf4/0x120
      [  358.716615]  el0t_64_sync+0x190/0x194
      
      Wrap the whole of vgic_its_create() with config_lock since, in addition
      to calling vgic_v4_init(), it also modifies the global kvm->arch.vgic
      state.
      
      Fixes: f0032773 ("KVM: arm64: Use config_lock to protect vgic state")
      Signed-off-by: default avatarJean-Philippe Brucker <jean-philippe@linaro.org>
      Reviewed-by: default avatarOliver Upton <oliver.upton@linux.dev>
      Signed-off-by: default avatarMarc Zyngier <maz@kernel.org>
      Link: https://lore.kernel.org/r/20230518100914.2837292-3-jean-philippe@linaro.org
      9cf2f840
    • Jean-Philippe Brucker's avatar
      KVM: arm64: vgic: Fix a circular locking issue · 59112e9c
      Jean-Philippe Brucker authored
      Lockdep reports a circular lock dependency between the srcu and the
      config_lock:
      
      [  262.179917] -> #1 (&kvm->srcu){.+.+}-{0:0}:
      [  262.182010]        __synchronize_srcu+0xb0/0x224
      [  262.183422]        synchronize_srcu_expedited+0x24/0x34
      [  262.184554]        kvm_io_bus_register_dev+0x324/0x50c
      [  262.185650]        vgic_register_redist_iodev+0x254/0x398
      [  262.186740]        vgic_v3_set_redist_base+0x3b0/0x724
      [  262.188087]        kvm_vgic_addr+0x364/0x600
      [  262.189189]        vgic_set_common_attr+0x90/0x544
      [  262.190278]        vgic_v3_set_attr+0x74/0x9c
      [  262.191432]        kvm_device_ioctl+0x2a0/0x4e4
      [  262.192515]        __arm64_sys_ioctl+0x7ac/0x1ba8
      [  262.193612]        invoke_syscall.constprop.0+0x70/0x1e0
      [  262.195006]        do_el0_svc+0xe4/0x2d4
      [  262.195929]        el0_svc+0x44/0x8c
      [  262.196917]        el0t_64_sync_handler+0xf4/0x120
      [  262.198238]        el0t_64_sync+0x190/0x194
      [  262.199224]
      [  262.199224] -> #0 (&kvm->arch.config_lock){+.+.}-{3:3}:
      [  262.201094]        __lock_acquire+0x2b70/0x626c
      [  262.202245]        lock_acquire+0x454/0x778
      [  262.203132]        __mutex_lock+0x190/0x8b4
      [  262.204023]        mutex_lock_nested+0x24/0x30
      [  262.205100]        vgic_mmio_write_v3_misc+0x5c/0x2a0
      [  262.206178]        dispatch_mmio_write+0xd8/0x258
      [  262.207498]        __kvm_io_bus_write+0x1e0/0x350
      [  262.208582]        kvm_io_bus_write+0xe0/0x1cc
      [  262.209653]        io_mem_abort+0x2ac/0x6d8
      [  262.210569]        kvm_handle_guest_abort+0x9b8/0x1f88
      [  262.211937]        handle_exit+0xc4/0x39c
      [  262.212971]        kvm_arch_vcpu_ioctl_run+0x90c/0x1c04
      [  262.214154]        kvm_vcpu_ioctl+0x450/0x12f8
      [  262.215233]        __arm64_sys_ioctl+0x7ac/0x1ba8
      [  262.216402]        invoke_syscall.constprop.0+0x70/0x1e0
      [  262.217774]        do_el0_svc+0xe4/0x2d4
      [  262.218758]        el0_svc+0x44/0x8c
      [  262.219941]        el0t_64_sync_handler+0xf4/0x120
      [  262.221110]        el0t_64_sync+0x190/0x194
      
      Note that the current report, which can be triggered by the vgic_irq
      kselftest, is a triple chain that includes slots_lock, but after
      inverting the slots_lock/config_lock dependency, the actual problem
      reported above remains.
      
      In several places, the vgic code calls kvm_io_bus_register_dev(), which
      synchronizes the srcu, while holding config_lock (#1). And the MMIO
      handler takes the config_lock while holding the srcu read lock (#0).
      
      Break dependency #1, by registering the distributor and redistributors
      without holding config_lock. The ITS also uses kvm_io_bus_register_dev()
      but already relies on slots_lock to serialize calls.
      
      The distributor iodev is created on the first KVM_RUN call. Multiple
      threads will race for vgic initialization, and only the first one will
      see !vgic_ready() under the lock. To serialize those threads, rely on
      slots_lock rather than config_lock.
      
      Redistributors are created earlier, through KVM_DEV_ARM_VGIC_GRP_ADDR
      ioctls and vCPU creation. Similarly, serialize the iodev creation with
      slots_lock, and the rest with config_lock.
      
      Fixes: f0032773 ("KVM: arm64: Use config_lock to protect vgic state")
      Signed-off-by: default avatarJean-Philippe Brucker <jean-philippe@linaro.org>
      Reviewed-by: default avatarOliver Upton <oliver.upton@linux.dev>
      Signed-off-by: default avatarMarc Zyngier <maz@kernel.org>
      Link: https://lore.kernel.org/r/20230518100914.2837292-2-jean-philippe@linaro.org
      59112e9c
  3. 11 May, 2023 3 commits
    • Marc Zyngier's avatar
      Merge branch kvm-arm64/pgtable-fixes-6.4 into kvmarm-master/fixes · c3a62df4
      Marc Zyngier authored
      * kvm-arm64/pgtable-fixes-6.4:
        : .
        : Fixes for concurrent S2 mapping race from Oliver:
        :
        : "So it appears that there is a race between two parallel stage-2 map
        : walkers that could lead to mapping the incorrect PA for a given IPA, as
        : the IPA -> PA relationship picks up an unintended offset. This series
        : eliminates the problem by using the current IPA of the walk as the
        : source-of-truth regarding where we are in a map operation."
        : .
        KVM: arm64: Constify start/end/phys fields of the pgtable walker data
        KVM: arm64: Infer PA offset from VA in hyp map walker
        KVM: arm64: Infer the PA offset from IPA in stage-2 map walker
      Signed-off-by: default avatarMarc Zyngier <maz@kernel.org>
      c3a62df4
    • Marc Zyngier's avatar
      Merge branch kvm-arm64/misc-6.4 into kvmarm-master/fixes · 9a48c597
      Marc Zyngier authored
      * kvm-arm64/misc-6.4:
        : .
        : Minor changes for 6.4:
        :
        : - Make better use of the bitmap API (bitmap_zero, bitmap_zalloc...)
        :
        : - FP/SVE/SME documentation update, in the hope that this field
        :   becomes clearer...
        :
        : - Add workaround for the usual Apple SEIS brokenness
        :
        : - Random comment fixes
        : .
        KVM: arm64: vgic: Add Apple M2 PRO/MAX cpus to the list of broken SEIS implementations
        KVM: arm64: Clarify host SME state management
        KVM: arm64: Restructure check for SVE support in FP trap handler
        KVM: arm64: Document check for TIF_FOREIGN_FPSTATE
        KVM: arm64: Fix repeated words in comments
        KVM: arm64: Use the bitmap API to allocate bitmaps
        KVM: arm64: Slightly optimize flush_context()
      Signed-off-by: default avatarMarc Zyngier <maz@kernel.org>
      9a48c597
    • Marc Zyngier's avatar
      KVM: arm64: vgic: Add Apple M2 PRO/MAX cpus to the list of broken SEIS implementations · e910baa9
      Marc Zyngier authored
      Unsurprisingly, the M2 PRO is also affected by the SEIS bug, so add it
      to the naughty list. And since M2 MAX is likely to be of the same ilk,
      flag it as well.
      
      Tested on a M2 PRO mini machine.
      Signed-off-by: default avatarMarc Zyngier <maz@kernel.org>
      Reviewed-by: default avatarZenghui Yu <yuzenghui@huawei.com>
      Link: https://lore.kernel.org/r/20230501182141.39770-1-maz@kernel.org
      e910baa9
  4. 07 May, 2023 8 commits
    • Linus Torvalds's avatar
      Linux 6.4-rc1 · ac9a7868
      Linus Torvalds authored
      ac9a7868
    • Linus Torvalds's avatar
      Merge tag 'perf-tools-for-v6.4-3-2023-05-06' of... · f085df1b
      Linus Torvalds authored
      Merge tag 'perf-tools-for-v6.4-3-2023-05-06' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux
      
      Pull perf tool updates from Arnaldo Carvalho de Melo:
       "Third version of perf tool updates, with the build problems with with
        using a 'vmlinux.h' generated from the main build fixed, and the bpf
        skeleton build disabled by default.
      
        Build:
      
         - Require libtraceevent to build, one can disable it using
           NO_LIBTRACEEVENT=1.
      
           It is required for tools like 'perf sched', 'perf kvm', 'perf
           trace', etc.
      
           libtraceevent is available in most distros so installing
           'libtraceevent-devel' should be a one-time event to continue
           building perf as usual.
      
           Using NO_LIBTRACEEVENT=1 produces tooling that is functional and
           sufficient for lots of users not interested in those libtraceevent
           dependent features.
      
         - Allow Python support in 'perf script' when libtraceevent isn't
           linked, as not all features requires it, for instance Intel PT does
           not use tracepoints.
      
         - Error if the python interpreter needed for jevents to work isn't
           available and NO_JEVENTS=1 isn't set, preventing a build without
           support for JSON vendor events, which is a rare but possible
           condition. The two check error messages:
      
              $(error ERROR: No python interpreter needed for jevents generation. Install python or build with NO_JEVENTS=1.)
              $(error ERROR: Python interpreter needed for jevents generation too old (older than 3.6). Install a newer python or build with NO_JEVENTS=1.)
      
         - Make libbpf 1.0 the minimum required when building with out of
           tree, distro provided libbpf.
      
         - Use libsdtc++'s and LLVM's libcxx's __cxa_demangle, a portable C++
           demangler, add 'perf test' entry for it.
      
         - Make binutils libraries opt in, as distros disable building with it
           due to licensing, they were used for C++ demangling, for instance.
      
         - Switch libpfm4 to opt-out rather than opt-in, if libpfm-devel (or
           equivalent) isn't installed, we'll just have a build warning:
      
             Makefile.config:1144: libpfm4 not found, disables libpfm4 support. Please install libpfm4-dev
      
         - Add a feature test for scandirat(), that is not implemented so far
           in musl and uclibc, disabling features that need it, such as
           scanning for tracepoints in /sys/kernel/tracing/events.
      
        perf BPF filters:
      
         - New feature where BPF can be used to filter samples, for instance:
      
            $ sudo ./perf record -e cycles --filter 'period > 1000' true
            $ sudo ./perf script
                 perf-exec 2273949 546850.708501:       5029 cycles:  ffffffff826f9e25 finish_wait+0x5 ([kernel.kallsyms])
                 perf-exec 2273949 546850.708508:      32409 cycles:  ffffffff826f9e25 finish_wait+0x5 ([kernel.kallsyms])
                 perf-exec 2273949 546850.708526:     143369 cycles:  ffffffff82b4cdbf xas_start+0x5f ([kernel.kallsyms])
                 perf-exec 2273949 546850.708600:     372650 cycles:  ffffffff8286b8f7 __pagevec_lru_add+0x117 ([kernel.kallsyms])
                 perf-exec 2273949 546850.708791:     482953 cycles:  ffffffff829190de __mod_memcg_lruvec_state+0x4e ([kernel.kallsyms])
                      true 2273949 546850.709036:     501985 cycles:  ffffffff828add7c tlb_gather_mmu+0x4c ([kernel.kallsyms])
                      true 2273949 546850.709292:     503065 cycles:      7f2446d97c03 _dl_map_object_deps+0x973 (/usr/lib/x86_64-linux-gnu/ld-linux-x86-64.so.2)
      
         - In addition to 'period' (PERF_SAMPLE_PERIOD), the other
           PERF_SAMPLE_ can be used for filtering, and also some other sample
           accessible values, from tools/perf/Documentation/perf-record.txt:
      
              Essentially the BPF filter expression is:
      
              <term> <operator> <value> (("," | "||") <term> <operator> <value>)*
      
           The <term> can be one of:
              ip, id, tid, pid, cpu, time, addr, period, txn, weight, phys_addr,
              code_pgsz, data_pgsz, weight1, weight2, weight3, ins_lat, retire_lat,
              p_stage_cyc, mem_op, mem_lvl, mem_snoop, mem_remote, mem_lock,
              mem_dtlb, mem_blk, mem_hops
      
           The <operator> can be one of:
              ==, !=, >, >=, <, <=, &
      
           The <value> can be one of:
              <number> (for any term)
              na, load, store, pfetch, exec (for mem_op)
              l1, l2, l3, l4, cxl, io, any_cache, lfb, ram, pmem (for mem_lvl)
              na, none, hit, miss, hitm, fwd, peer (for mem_snoop)
              remote (for mem_remote)
              na, locked (for mem_locked)
              na, l1_hit, l1_miss, l2_hit, l2_miss, any_hit, any_miss, walk, fault (for mem_dtlb)
              na, by_data, by_addr (for mem_blk)
              hops0, hops1, hops2, hops3 (for mem_hops)
      
        perf lock contention:
      
         - Show lock type with address.
      
         - Track and show mmap_lock, siglock and per-cpu rq_lock with address.
           This is done for mmap_lock by following the current->mm pointer:
      
            $ sudo ./perf lock con -abl -- sleep 10
             contended   total wait     max wait     avg wait            address   symbol
             ...
                 16344    312.30 ms      2.22 ms     19.11 us   ffff8cc702595640
                 17686    310.08 ms      1.49 ms     17.53 us   ffff8cc7025952c0
                     3     84.14 ms     45.79 ms     28.05 ms   ffff8cc78114c478   mmap_lock
                  3557     76.80 ms     68.75 us     21.59 us   ffff8cc77ca3af58
                     1     68.27 ms     68.27 ms     68.27 ms   ffff8cda745dfd70
                     9     54.53 ms      7.96 ms      6.06 ms   ffff8cc7642a48b8   mmap_lock
                 14629     44.01 ms     60.00 us      3.01 us   ffff8cc7625f9ca0
                  3481     42.63 ms    140.71 us     12.24 us   ffffffff937906ac   vmap_area_lock
                 16194     38.73 ms     42.15 us      2.39 us   ffff8cd397cbc560
                    11     38.44 ms     10.39 ms      3.49 ms   ffff8ccd6d12fbb8   mmap_lock
                     1      5.43 ms      5.43 ms      5.43 ms   ffff8cd70018f0d8
                  1674      5.38 ms    422.93 us      3.21 us   ffffffff92e06080   tasklist_lock
                   581      4.51 ms    130.68 us      7.75 us   ffff8cc9b1259058
                     5      3.52 ms      1.27 ms    703.23 us   ffff8cc754510070
                   112      3.47 ms     56.47 us     31.02 us   ffff8ccee38b3120
                   381      3.31 ms     73.44 us      8.69 us   ffffffff93790690   purge_vmap_area_lock
                   255      3.19 ms     36.35 us     12.49 us   ffff8d053ce30c80
      
         - Update default map size to 16384.
      
         - Allocate single letter option -M for --map-nr-entries, as it is
           proving being frequently used.
      
         - Fix struct rq lock access for older kernels with BPF's CO-RE
           (Compile once, run everywhere).
      
         - Fix problems found with MSAn.
      
        perf report/top:
      
         - Add inline information when using --call-graph=fp or lbr, as was
           already done to the --call-graph=dwarf callchain mode.
      
         - Improve the 'srcfile' sort key performance by really using an
           optimization introduced in 6.2 for the 'srcline' sort key that
           avoids calling addr2line for comparision with each sample.
      
        perf sched:
      
         - Make 'perf sched latency/map/replay' to use "sched:sched_waking"
           instead of "sched:sched_waking", consistent with 'perf record'
           since d566a9c2 ("perf sched: Prefer sched_waking event when it
           exists").
      
        perf ftrace:
      
         - Make system wide the default target for latency subcommand, run the
           following command then generate some network traffic and press
           control+C:
      
             # perf ftrace latency -T __kfree_skb
           ^C
               DURATION     |      COUNT | GRAPH                                          |
                0 - 1    us |         27 | #############                                  |
                1 - 2    us |         22 | ###########                                    |
                2 - 4    us |          8 | ####                                           |
                4 - 8    us |          5 | ##                                             |
                8 - 16   us |         24 | ############                                   |
               16 - 32   us |          2 | #                                              |
               32 - 64   us |          1 |                                                |
               64 - 128  us |          0 |                                                |
              128 - 256  us |          0 |                                                |
              256 - 512  us |          0 |                                                |
              512 - 1024 us |          0 |                                                |
                1 - 2    ms |          0 |                                                |
                2 - 4    ms |          0 |                                                |
                4 - 8    ms |          0 |                                                |
                8 - 16   ms |          0 |                                                |
               16 - 32   ms |          0 |                                                |
               32 - 64   ms |          0 |                                                |
               64 - 128  ms |          0 |                                                |
              128 - 256  ms |          0 |                                                |
              256 - 512  ms |          0 |                                                |
              512 - 1024 ms |          0 |                                                |
                1 - ...   s |          0 |                                                |
             #
      
        perf top:
      
         - Add --branch-history (LBR: Last Branch Record) option, just like
           already available for 'perf record'.
      
         - Fix segfault in thread__comm_len() where thread->comm was being
           used outside thread->comm_lock.
      
        perf annotate:
      
         - Allow configuring objdump and addr2line in ~/.perfconfig., so that
           you can use alternative binaries, such as llvm's.
      
        perf kvm:
      
         - Add TUI mode for 'perf kvm stat report'.
      
        Reference counting:
      
         - Add reference count checking infrastructure to check for use after
           free, done to the 'cpumap', 'namespaces', 'maps' and 'map' structs,
           more to come.
      
           To build with it use -DREFCNT_CHECKING=1 in the make command line
           to build tools/perf. Documented at:
      
             https://perf.wiki.kernel.org/index.php/Reference_Count_Checking
      
         - The above caught, for instance, fix, present in this series:
      
              - Fix maps use after put in 'perf test "Share thread maps"':
      
                'maps' is copied from leader, but the leader is put on line 79
                and then 'maps' is used to read the reference count below - so
                a use after put, with the put of maps happening within
                thread__put.
      
           Fixed by reversing the order of puts so that the leader is put
           last.
      
         - Also several fixes were made to places where reference counts were
           not being held.
      
         - Make this one of the tests in 'make -C tools/perf build-test' to
           regularly build test it and to make sure no direct access to the
           reference counted structs are made, doing that via accessors to
           check the validity of the struct pointer.
      
        ARM64:
      
         - Fix 'perf report' segfault when filtering coresight traces by
           sparse lists of CPUs.
      
         - Add support for 'simd' as a sort field for 'perf report', to show
           ARM's NEON SIMD's predicate flags: "partial" and "empty".
      
        arm64 vendor events:
      
         - Add N1 metrics.
      
        Intel vendor events:
      
         - Add graniterapids, grandridge and sierraforrest events.
      
         - Refresh events for: alderlake, aldernaken, broadwell, broadwellde,
           broadwellx, cascadelakx, haswell, haswellx, icelake, icelakex,
           jaketown, meteorlake, knightslanding, sandybridge, sapphirerapids,
           silvermont, skylake, tigerlake and westmereep-dp
      
         - Refresh metrics for alderlake-n, broadwell, broadwellde,
           broadwellx, haswell, haswellx, icelakex, ivybridge, ivytown and
           skylakex.
      
        perf stat:
      
         - Implement --topdown using JSON metrics.
      
         - Add TopdownL1 JSON metric as a default if present, but disable it
           for now for some Intel hybrid architectures, a series of patches
           addressing this is being reviewed and will be submitted for v6.5.
      
         - Use metrics for --smi-cost.
      
         - Update topdown documentation.
      
        Vendor events (JSON) infrastructure:
      
         - Add support for computing and printing metric threshold values. For
           instance, here is one found in thesapphirerapids json file:
      
             {
                 "BriefDescription": "Percentage of cycles spent in System Management Interrupts.",
                 "MetricExpr": "((msr@aperf@ - cycles) / msr@aperf@ if msr@smi@ > 0 else 0)",
                 "MetricGroup": "smi",
                 "MetricName": "smi_cycles",
                 "MetricThreshold": "smi_cycles > 0.1",
                 "ScaleUnit": "100%"
             },
      
         - Test parsing metric thresholds with the fake PMU in 'perf test
           pmu-events'.
      
         - Support for printing metric thresholds in 'perf list'.
      
         - Add --metric-no-threshold option to 'perf stat'.
      
         - Add rand (reverse and) and has_pmem (optane memory) support to
           metrics.
      
         - Sort list of input files to avoid depending on the order from
           readdir() helping in obtaining reproducible builds.
      
        S/390:
      
         - Add common metrics: - CPI (cycles per instruction), prbstate (ratio
           of instructions executed in problem state compared to total number
           of instructions), l1mp (Level one instruction and data cache misses
           per 100 instructions).
      
         - Add cache metrics for z13, z14, z15 and z16.
      
         - Add metric for TLB and cache.
      
        ARM:
      
         - Add raw decoding for SPE (Statistical Profiling Extension) v1.3 MTE
           (Memory Tagging Extension) and MOPS (Memory Operations) load/store.
      
        Intel PT hardware tracing:
      
         - Add event type names UINTR (User interrupt delivered) and UIRET
           (Exiting from user interrupt routine), documented in table 32-50
           "CFE Packet Type and Vector Fields Details" in the Intel Processor
           Trace chapter of The Intel SDM Volume 3 version 078.
      
         - Add support for new branch instructions ERETS and ERETU.
      
         - Fix CYC timestamps after standalone CBR
      
        ARM CoreSight hardware tracing:
      
         - Allow user to override timestamp and contextid settings.
      
         - Fix segfault in dso lookup.
      
         - Fix timeless decode mode detection.
      
         - Add separate decode paths for timeless and per-thread modes.
      
        auxtrace:
      
         - Fix address filter entire kernel size.
      
        Miscellaneous:
      
         - Fix use-after-free and unaligned bugs in the PLT handling routines.
      
         - Use zfree() to reduce chances of use after free.
      
         - Add missing 0x prefix for addresses printed in hexadecimal in 'perf
           probe'.
      
         - Suppress massive unsupported target platform errors in the unwind
           code.
      
         - Fix return incorrect build_id size in elf_read_build_id().
      
         - Fix 'perf scripts intel-pt-events.py' IPC output for Python 2 .
      
         - Add missing new parameter in kfree_skb tracepoint to the python
           scripts using it.
      
         - Add 'perf bench syscall fork' benchmark.
      
         - Add support for printing PERF_MEM_LVLNUM_UNC (Uncached access) in
           'perf mem'.
      
         - Fix wrong size expectation for perf test 'Setup struct
           perf_event_attr' caused by the patch adding
           perf_event_attr::config3.
      
         - Fix some spelling mistakes"
      
      * tag 'perf-tools-for-v6.4-3-2023-05-06' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux: (365 commits)
        Revert "perf build: Make BUILD_BPF_SKEL default, rename to NO_BPF_SKEL"
        Revert "perf build: Warn for BPF skeletons if endian mismatches"
        perf metrics: Fix SEGV with --for-each-cgroup
        perf bpf skels: Stop using vmlinux.h generated from BTF, use subset of used structs + CO-RE
        perf stat: Separate bperf from bpf_profiler
        perf test record+probe_libc_inet_pton: Fix call chain match on x86_64
        perf test record+probe_libc_inet_pton: Fix call chain match on s390
        perf tracepoint: Fix memory leak in is_valid_tracepoint()
        perf cs-etm: Add fix for coresight trace for any range of CPUs
        perf build: Fix unescaped # in perf build-test
        perf unwind: Suppress massive unsupported target platform errors
        perf script: Add new parameter in kfree_skb tracepoint to the python scripts using it
        perf script: Print raw ip instead of binary offset for callchain
        perf symbols: Fix return incorrect build_id size in elf_read_build_id()
        perf list: Modify the warning message about scandirat(3)
        perf list: Fix memory leaks in print_tracepoint_events()
        perf lock contention: Rework offset calculation with BPF CO-RE
        perf lock contention: Fix struct rq lock access
        perf stat: Disable TopdownL1 on hybrid
        perf stat: Avoid SEGV on counter->name
        ...
      f085df1b
    • Linus Torvalds's avatar
      Merge tag 'core-debugobjects-2023-05-06' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 17784de6
      Linus Torvalds authored
      Pull debugobjects fix from Thomas Gleixner:
       "A single fix for debugobjects:
      
        The recent fix to ensure atomicity of lookup and allocation
        inadvertently broke the pool refill mechanism, so that debugobject
        OOMs now in certain situations. The reason is that the functions which
        got updated no longer invoke debug_objecs_init(), which is now the
        only place to care about refilling the tracking object pool.
      
        Restore the original behaviour by adding explicit refill opportunities
        to those places"
      
      * tag 'core-debugobjects-2023-05-06' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        debugobject: Ensure pool refill (again)
      17784de6
    • Linus Torvalds's avatar
      Merge tag 'v6.4-p2' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 · 6f69c981
      Linus Torvalds authored
      Pull crypto fixes from Herbert Xu:
      
       - A long-standing bug in crypto_engine
      
       - A buggy but harmless check in the sun8i-ss driver
      
       - A regression in the CRYPTO_USER interface
      
      * tag 'v6.4-p2' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
        crypto: api - Fix CRYPTO_USER checks for report function
        crypto: engine - fix crypto_queue backlog handling
        crypto: sun8i-ss - Fix a test in sun8i_ss_setup_ivs()
      6f69c981
    • Linus Torvalds's avatar
      Merge tag '6.4-rc-smb3-client-fixes-part2' of git://git.samba.org/sfrench/cifs-2.6 · 63342b1d
      Linus Torvalds authored
      Pull cifs fixes from Steve French:
       "smb3 client fixes, mostly DFS or reconnect related:
      
         - Two DFS connection sharing fixes
      
         - DFS refresh fix
      
         - Reconnect fix
      
         - Two potential use after free fixes
      
         - Also print prefix patch in mount debug msg
      
         - Two small cleanup fixes"
      
      * tag '6.4-rc-smb3-client-fixes-part2' of git://git.samba.org/sfrench/cifs-2.6:
        cifs: Remove unneeded semicolon
        cifs: fix sharing of DFS connections
        cifs: avoid potential races when handling multiple dfs tcons
        cifs: protect access of TCP_Server_Info::{origin,leaf}_fullpath
        cifs: fix potential race when tree connecting ipc
        cifs: fix potential use-after-free bugs in TCP_Server_Info::hostname
        cifs: print smb3_fs_context::source when mounting
        cifs: protect session status check in smb2_reconnect()
        SMB3.1.1: correct definition for app_instance_id create contexts
      63342b1d
    • Linus Torvalds's avatar
      Merge tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux · d6b8a8c4
      Linus Torvalds authored
      Pull clk fixes from Stephen Boyd:
       "A couple more patches that would be good to get into -rc1:
      
         - Revert an i.MX patch that's causing video failures because division
           math goes sideways
      
         - Fix a clang + W=1 build isue where FIELD_PREP() is taking a 32-bit
           variable instead of the usual u64 type
      
         - Fix a Kconfig bug in the StarFive JH7110 clk config that selects a
           reset controller when it can't be selected"
      
      * tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux:
        clk: starfive: Fix RESET_STARFIVE_JH7110 can't be selected in a specified case
        clk: sp7021: Adjust width of _m in HWM_FIELD_PREP()
        Revert "clk: imx: composite-8m: Add support to determine_rate"
      d6b8a8c4
    • Linus Torvalds's avatar
      Merge tag 'mailbox-v6.4' of git://git.linaro.org/landing-teams/working/fujitsu/integration · 1c1094e4
      Linus Torvalds authored
      Pull mailbox updates from Jassi Brar:
      
       - mailbox api: allow direct registration to a channel and convert omap
         and pcc to use mbox_bind_client
      
       - omap and hi6220 : use of_property_read_bool
      
       - test: fix double-free and use spinlock header
      
       - rockchip and bcm-pdc: drop of_match_ptr
      
       - mpfs: change config symbol
      
       - mediatek gce: support MT6795
      
       - qcom apcs: consolidate of_device_id and support IPQ9574
      
      * tag 'mailbox-v6.4' of git://git.linaro.org/landing-teams/working/fujitsu/integration:
        dt-bindings: mailbox: qcom: add compatible for IPQ9574 SoC
        mailbox: qcom-apcs-ipc: do not grow the of_device_id
        dt-bindings: mailbox: qcom,apcs-kpss-global: use fallbacks for few variants
        dt-bindings: mailbox: mediatek,gce-mailbox: Add support for MT6795
        mailbox: mpfs: convert SOC_MICROCHIP_POLARFIRE to ARCH_MICROCHIP_POLARFIRE
        mailbox: bcm-pdc: drop of_match_ptr for ID table
        mailbox: rockchip: drop of_match_ptr for ID table
        mailbox: mailbox-test: Fix potential double-free in mbox_test_message_write()
        mailbox: mailbox-test: Explicitly include header for spinlock support
        mailbox: Use of_property_read_bool() for boolean properties
        mailbox: pcc: Use mbox_bind_client
        mailbox: omap: Use mbox_bind_client
        mailbox: Allow direct registration to a channel
      1c1094e4
    • Linus Torvalds's avatar
      Merge tag 'for-6.4/io_uring-2023-05-07' of git://git.kernel.dk/linux · 03e5cb7b
      Linus Torvalds authored
      Pull more io_uring updates from Jens Axboe:
       "Nothing major in here, just two different parts:
      
         - A small series from Breno that enables passing the full SQE down
           for ->uring_cmd().
      
           This is a prerequisite for enabling full network socket operations.
           Queued up a bit late because of some stylistic concerns that got
           resolved, would be nice to have this in 6.4-rc1 so the dependent
           work will be easier to handle for 6.5.
      
         - Fix for the huge page coalescing, which was a regression introduced
           in the 6.3 kernel release (Tobias)"
      
      * tag 'for-6.4/io_uring-2023-05-07' of git://git.kernel.dk/linux:
        io_uring: Remove unnecessary BUILD_BUG_ON
        io_uring: Pass whole sqe to commands
        io_uring: Create a helper to return the SQE size
        io_uring/rsrc: check for nonconsecutive pages
      03e5cb7b
  5. 06 May, 2023 22 commits