1. 30 May, 2020 4 commits
    • Serge Semin's avatar
      clk: Add Baikal-T1 CCU Dividers driver · 353afa3a
      Serge Semin authored
      Nearly each Baikal-T1 IP-core is supposed to have a clock source
      of particular frequency. But since there are greater than five
      IP-blocks embedded into the SoC, the CCU PLLs can't fulfill all the
      needs. Baikal-T1 CCU provides a set of fixed and configurable clock
      dividers in order to generate a necessary signal for each chip
      sub-block.
      
      This driver creates the of-based hardware clocks for each divider
      available in Baikal-T1 CCU. The same way as for PLLs we split the
      functionality up into the clocks operations (gate, ungate, set rate,
      etc) and hardware clocks declaration/registration procedures.
      
      In accordance with the CCU documentation all its dividers are distributed
      into two CCU sub-blocks: AXI-bus and system devices reference clocks.
      The former sub-block is used to supply the clocks for AXI-bus interfaces
      (AXI clock domains) and the later one provides the SoC IP-cores reference
      clocks. Each sub-block is represented by a dedicated DT node, so they
      have different compatible strings to distinguish one from another.
      
      For some reason CCU provides the dividers of different types. Some
      dividers can be gateable some can't, some are fixed while the others
      are variable, some have special divider' limitations, some've got a
      non-standard register layout and so on. In order to cover all of these
      cases the hardware clocks driver is designed with an info-descriptor
      pattern. So there are special static descriptors declared for the
      dividers of each type with additional flags describing the block
      peculiarity. These descriptors are then used to create hardware clocks
      with proper operations.
      
      Some CCU dividers provide a way to reset a domain they generate
      a clock for. So the CCU AXI-bus and CCU system devices clock
      drivers also perform the reset controller registration.
      Signed-off-by: default avatarSerge Semin <Sergey.Semin@baikalelectronics.ru>
      Cc: Alexey Malahov <Alexey.Malahov@baikalelectronics.ru>
      Cc: Arnd Bergmann <arnd@arndb.de>
      Cc: Rob Herring <robh+dt@kernel.org>
      Cc: linux-mips@vger.kernel.org
      Cc: devicetree@vger.kernel.org
      Link: https://lore.kernel.org/r/20200526222056.18072-5-Sergey.Semin@baikalelectronics.ru
      [sboyd@kernel.org: Drop return from void function, silence sparse
      warnings about initializing structs with NULL vs. integer]
      Signed-off-by: default avatarStephen Boyd <sboyd@kernel.org>
      353afa3a
    • Serge Semin's avatar
      clk: Add Baikal-T1 CCU PLLs driver · b7d950b9
      Serge Semin authored
      Baikal-T1 is supposed to be supplied with a high-frequency external
      oscillator. But in order to create signals suitable for each IP-block
      embedded into the SoC the oscillator output is primarily connected to
      a set of CCU PLLs. There are five of them to create clocks for the MIPS
      P5600 cores, an embedded DDR controller, SATA, Ethernet and PCIe domains.
      The last three domains though named by the biggest system interfaces in
      fact include nearly all of the rest SoC peripherals. Each of the PLLs is
      based on True Circuits TSMC CLN28HPM IP-core with an interface wrapper
      (so called safe PLL' clocks switcher) to simplify the PLL configuration
      procedure.
      
      This driver creates the of-based hardware clocks to use them then in
      the corresponding subsystems. In order to simplify the driver code we
      split the functionality up into the PLLs clocks operations and hardware
      clocks declaration/registration procedures.
      
      Even though the PLLs are based on the same IP-core, they may have some
      differences. In particular, some CCU PLLs support the output clock change
      without gating them (like CPU or PCIe PLLs), while the others don't, some
      CCU PLLs are critical and aren't supposed to be gated. In order to cover
      all of these cases the hardware clocks driver is designed with an
      info-descriptor pattern. So there are special static descriptors declared
      for each PLL, which is then used to create a hardware clock with proper
      operations. Additionally debugfs-files are provided for each PLL' field
      to make sure the implemented rate-PLLs-dividers calculation algorithm is
      correct.
      Signed-off-by: default avatarSerge Semin <Sergey.Semin@baikalelectronics.ru>
      Cc: Alexey Malahov <Alexey.Malahov@baikalelectronics.ru>
      Cc: Arnd Bergmann <arnd@arndb.de>
      Cc: Rob Herring <robh+dt@kernel.org>
      Cc: linux-mips@vger.kernel.org
      Cc: devicetree@vger.kernel.org
      Link: https://lore.kernel.org/r/20200526222056.18072-4-Sergey.Semin@baikalelectronics.ru
      [sboyd@kernel.org: Silence sparse warning about initializing structs
      with NULL vs. integer]
      Signed-off-by: default avatarStephen Boyd <sboyd@kernel.org>
      b7d950b9
    • Serge Semin's avatar
      dt-bindings: clk: Add Baikal-T1 CCU Dividers binding · 11ea09b9
      Serge Semin authored
      After being gained by the CCU PLLs the signals must be transformed to
      be suitable for the clock-consumers. This is done by a set of dividers
      embedded into the CCU. A first block of dividers is used to create
      reference clocks for AXI-bus of high-speed peripheral IP-cores of the
      chip. The second block dividers alter the PLLs output signals to be then
      consumed by SoC peripheral devices. Both block DT nodes are ordinary
      clock-providers with standard set of properties supported. But in addition
      to that each clock provider can be used to reset the corresponding clock
      domain. This makes the AXI-bus and System Devices CCU DT nodes to be also
      reset-providers.
      Signed-off-by: default avatarSerge Semin <Sergey.Semin@baikalelectronics.ru>
      Cc: Alexey Malahov <Alexey.Malahov@baikalelectronics.ru>
      Cc: Arnd Bergmann <arnd@arndb.de>
      Cc: linux-mips@vger.kernel.org
      Link: https://lore.kernel.org/r/20200526222056.18072-3-Sergey.Semin@baikalelectronics.ruReviewed-by: default avatarRob Herring <robh@kernel.org>
      Signed-off-by: default avatarStephen Boyd <sboyd@kernel.org>
      11ea09b9
    • Serge Semin's avatar
      dt-bindings: clk: Add Baikal-T1 CCU PLLs binding · aec6adc5
      Serge Semin authored
      Baikal-T1 Clocks Control Unit is responsible for transformation of a
      signal coming from an external oscillator into clocks of various
      frequencies to propagate them then to the corresponding clocks
      consumers (either individual IP-blocks or clock domains). In order
      to create a set of high-frequency clocks the external signal is
      firstly handled by the embedded into CCU PLLs. So the corresponding
      dts-node is just a normal clock-provider node with standard set of
      properties. Note as being part of the Baikal-T1 System Controller its
      DT node is supposed to be a child the system controller node.
      Signed-off-by: default avatarSerge Semin <Sergey.Semin@baikalelectronics.ru>
      Cc: Alexey Malahov <Alexey.Malahov@baikalelectronics.ru>
      Cc: Arnd Bergmann <arnd@arndb.de>
      Cc: linux-mips@vger.kernel.org
      Link: https://lore.kernel.org/r/20200526222056.18072-2-Sergey.Semin@baikalelectronics.ruReviewed-by: default avatarRob Herring <robh@kernel.org>
      Signed-off-by: default avatarStephen Boyd <sboyd@kernel.org>
      aec6adc5
  2. 12 Apr, 2020 10 commits
    • Linus Torvalds's avatar
      Linux 5.7-rc1 · 8f3d9f35
      Linus Torvalds authored
      8f3d9f35
    • Linus Torvalds's avatar
      MAINTAINERS: sort field names for all entries · 3b50142d
      Linus Torvalds authored
      This sorts the actual field names too, potentially causing even more
      chaos and confusion at merge time if you have edited the MAINTAINERS
      file.  But the end result is a more consistent layout, and hopefully
      it's a one-time pain minimized by doing this just before the -rc1
      release.
      
      This was entirely scripted:
      
        ./scripts/parse-maintainers.pl --input=MAINTAINERS --output=MAINTAINERS --order
      Requested-by: default avatarJoe Perches <joe@perches.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      3b50142d
    • Linus Torvalds's avatar
      MAINTAINERS: sort entries by entry name · 4400b7d6
      Linus Torvalds authored
      They are all supposed to be sorted, but people who add new entries don't
      always know the alphabet.  Plus sometimes the entry names get edited,
      and people don't then re-order the entry.
      
      Let's see how painful this will be for merging purposes (the MAINTAINERS
      file is often edited in various different trees), but Joe claims there's
      relatively few patches in -next that touch this, and doing it just
      before -rc1 is likely the best time.  Fingers crossed.
      
      This was scripted with
      
        /scripts/parse-maintainers.pl --input=MAINTAINERS --output=MAINTAINERS
      
      but then I also ended up manually upper-casing a few entry names that
      stood out when looking at the end result.
      Requested-by: default avatarJoe Perches <joe@perches.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      4400b7d6
    • Linus Torvalds's avatar
      Merge tag 'x86-urgent-2020-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 4f8a3cc1
      Linus Torvalds authored
      Pull x86 fixes from Thomas Gleixner:
       "A set of three patches to fix the fallout of the newly added split
        lock detection feature.
      
        It addressed the case where a KVM guest triggers a split lock #AC and
        KVM reinjects it into the guest which is not prepared to handle it.
      
        Add proper sanity checks which prevent the unconditional injection
        into the guest and handles the #AC on the host side in the same way as
        user space detections are handled. Depending on the detection mode it
        either warns and disables detection for the task or kills the task if
        the mode is set to fatal"
      
      * tag 'x86-urgent-2020-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        KVM: VMX: Extend VMXs #AC interceptor to handle split lock #AC in guest
        KVM: x86: Emulate split-lock access as a write in emulator
        x86/split_lock: Provide handle_guest_split_lock()
      4f8a3cc1
    • Linus Torvalds's avatar
      Merge tag 'timers-urgent-2020-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 0785249f
      Linus Torvalds authored
      Pull time(keeping) updates from Thomas Gleixner:
      
       - Fix the time_for_children symlink in /proc/$PID/ so it properly
         reflects that it part of the 'time' namespace
      
       - Add the missing userns limit for the allowed number of time
         namespaces, which was half defined but the actual array member was
         not added. This went unnoticed as the array has an exessive empty
         member at the end but introduced a user visible regression as the
         output was corrupted.
      
       - Prevent further silent ucount corruption by adding a BUILD_BUG_ON()
         to catch half updated data.
      
      * tag 'timers-urgent-2020-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        ucount: Make sure ucounts in /proc/sys/user don't regress again
        time/namespace: Add max_time_namespaces ucount
        time/namespace: Fix time_for_children symlink
      0785249f
    • Linus Torvalds's avatar
      Merge tag 'sched-urgent-2020-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 590680d1
      Linus Torvalds authored
      Pull scheduler fixes/updates from Thomas Gleixner:
      
       - Deduplicate the average computations in the scheduler core and the
         fair class code.
      
       - Fix a raise between runtime distribution and assignement which can
         cause exceeding the quota by up to 70%.
      
       - Prevent negative results in the imbalanace calculation
      
       - Remove a stale warning in the workqueue code which can be triggered
         since the call site was moved out of preempt disabled code. It's a
         false positive.
      
       - Deduplicate the print macros for procfs
      
       - Add the ucmap values to the SCHED_DEBUG procfs output for completness
      
      * tag 'sched-urgent-2020-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        sched/debug: Add task uclamp values to SCHED_DEBUG procfs
        sched/debug: Factor out printing formats into common macros
        sched/debug: Remove redundant macro define
        sched/core: Remove unused rq::last_load_update_tick
        workqueue: Remove the warning in wq_worker_sleeping()
        sched/fair: Fix negative imbalance in imbalance calculation
        sched/fair: Fix race between runtime distribution and assignment
        sched/fair: Align rq->avg_idle and rq->avg_scan_cost
      590680d1
    • Linus Torvalds's avatar
      Merge tag 'perf-urgent-2020-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 20e2aa81
      Linus Torvalds authored
      Pull perf fixes from Thomas Gleixner:
       "Three fixes/updates for perf:
      
         - Fix the perf event cgroup tracking which tries to track the cgroup
           even for disabled events.
      
         - Add Ice Lake server support for uncore events
      
         - Disable pagefaults when retrieving the physical address in the
           sampling code"
      
      * tag 'perf-urgent-2020-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        perf/core: Disable page faults when getting phys address
        perf/x86/intel/uncore: Add Ice Lake server uncore support
        perf/cgroup: Correct indirection in perf_less_group_idx()
        perf/core: Fix event cgroup tracking
      20e2aa81
    • Linus Torvalds's avatar
      Merge tag 'locking-urgent-2020-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 652fa53c
      Linus Torvalds authored
      Pull locking fixes from Thomas Gleixner:
       "Three small fixes/updates for the locking core code:
      
         - Plug a task struct reference leak in the percpu rswem
           implementation.
      
         - Document the refcount interaction with PID_MAX_LIMIT
      
         - Improve the 'invalid wait context' data dump in lockdep so it
           contains all information which is required to decode the problem"
      
      * tag 'locking-urgent-2020-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        locking/lockdep: Improve 'invalid wait context' splat
        locking/refcount: Document interaction with PID_MAX_LIMIT
        locking/percpu-rwsem: Fix a task_struct refcount
      652fa53c
    • Linus Torvalds's avatar
      Merge tag '5.7-rc-smb3-fixes-part2' of git://git.samba.org/sfrench/cifs-2.6 · 4119bf9f
      Linus Torvalds authored
      Pull cifs fixes from Steve French:
       "Ten cifs/smb fixes:
      
         - five RDMA (smbdirect) related fixes
      
         - add experimental support for swap over SMB3 mounts
      
         - also a fix which improves performance of signed connections"
      
      * tag '5.7-rc-smb3-fixes-part2' of git://git.samba.org/sfrench/cifs-2.6:
        smb3: enable swap on SMB3 mounts
        smb3: change noisy error message to FYI
        smb3: smbdirect support can be configured by default
        cifs: smbd: Do not schedule work to send immediate packet on every receive
        cifs: smbd: Properly process errors on ib_post_send
        cifs: Allocate crypto structures on the fly for calculating signatures of incoming packets
        cifs: smbd: Update receive credits before sending and deal with credits roll back on failure before sending
        cifs: smbd: Check send queue size before posting a send
        cifs: smbd: Merge code to track pending packets
        cifs: ignore cached share root handle closing errors
      4119bf9f
    • Linus Torvalds's avatar
      Merge tag 'nfs-for-5.7-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs · 50bda5fa
      Linus Torvalds authored
      Pull NFS client bugfix from Trond Myklebust:
       "Fix an RCU read lock leakage in pnfs_alloc_ds_commits_list()"
      
      * tag 'nfs-for-5.7-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
        pNFS: Fix RCU lock leakage
      50bda5fa
  3. 11 Apr, 2020 14 commits
  4. 10 Apr, 2020 12 commits