1. 03 Feb, 2017 24 commits
    • James Hogan's avatar
      KVM: MIPS/MMU: Convert TLB mapped faults to page tables · 7e3d2a75
      James Hogan authored
      Now that we have GVA page tables and an optimised TLB refill handler in
      place, convert the handling of page faults in TLB mapped segment from
      the guest to fill a single GVA page table entry and invalidate the TLB
      entry, rather than filling a TLB entry pair directly.
      
      Also remove the now unused kvm_mips_get_{kernel,user}_asid() functions
      in mmu.c and kvm_mips_host_tlb_write() in tlb.c.
      Signed-off-by: default avatarJames Hogan <james.hogan@imgtec.com>
      Cc: Paolo Bonzini <pbonzini@redhat.com>
      Cc: "Radim Krčmář" <rkrcmar@redhat.com>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: linux-mips@linux-mips.org
      Cc: kvm@vger.kernel.org
      7e3d2a75
    • James Hogan's avatar
      KVM: MIPS/MMU: Convert KSeg0 faults to page tables · fb995893
      James Hogan authored
      Now that we have GVA page tables and an optimised TLB refill handler in
      place, convert the handling of KSeg0 page faults from the guest to fill
      the GVA page tables and invalidate the TLB entry, rather than filling a
      TLB entry directly.
      Signed-off-by: default avatarJames Hogan <james.hogan@imgtec.com>
      Cc: Paolo Bonzini <pbonzini@redhat.com>
      Cc: "Radim Krčmář" <rkrcmar@redhat.com>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: linux-mips@linux-mips.org
      Cc: kvm@vger.kernel.org
      fb995893
    • James Hogan's avatar
      KVM: MIPS/MMU: Invalidate stale GVA PTEs on TLBW · aba85929
      James Hogan authored
      Implement invalidation of specific pairs of GVA page table entries in
      one or both of the GVA page tables. This is used when existing mappings
      are replaced in the guest TLB by emulated TLBWI/TLBWR instructions. Due
      to the sharing of page tables in the host kernel range, we should be
      careful not to allow host pages to be invalidated.
      
      Add a helper kvm_mips_walk_pgd() which can be used when walking of
      either GPA (future patches) or GVA page tables is needed, optionally
      with allocation of page tables along the way when they don't exist.
      
      GPA page table walking will need to be protected by the kvm->mmu_lock,
      so we also add a small MMU page cache in each KVM VCPU, like that found
      for other architectures but smaller. This allows enough pages to be
      pre-allocated to handle a single fault without holding the lock,
      allowing the helper to run with the lock held without having to handle
      allocation failures.
      
      Using the same mechanism for GVA allows the same code to be used, and
      allows it to use the same cache of allocated pages if the GPA walk
      didn't need to allocate any new tables.
      Signed-off-by: default avatarJames Hogan <james.hogan@imgtec.com>
      Cc: Paolo Bonzini <pbonzini@redhat.com>
      Cc: "Radim Krčmář" <rkrcmar@redhat.com>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: linux-mips@linux-mips.org
      Cc: kvm@vger.kernel.org
      aba85929
    • James Hogan's avatar
      KVM: MIPS/MMU: Invalidate GVA PTs on ASID changes · a31b50d7
      James Hogan authored
      Implement invalidation of large ranges of virtual addresses from GVA
      page tables in response to a guest ASID change (immediately for guest
      kernel page table, lazily for guest user page table).
      
      We iterate through a range of page tables invalidating entries and
      freeing fully invalidated tables. To minimise overhead the exact ranges
      invalidated depends on the flags argument to kvm_mips_flush_gva_pt(),
      which also allows it to be used in future KVM_CAP_SYNC_MMU patches in
      response to GPA changes, which unlike guest TLB mapping changes affects
      guest KSeg0 mappings.
      Signed-off-by: default avatarJames Hogan <james.hogan@imgtec.com>
      Cc: Paolo Bonzini <pbonzini@redhat.com>
      Cc: "Radim Krčmář" <rkrcmar@redhat.com>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: linux-mips@linux-mips.org
      Cc: kvm@vger.kernel.org
      a31b50d7
    • James Hogan's avatar
      KVM: MIPS/TLB: Generalise host TLB invalidate to kernel ASID · 57e3869c
      James Hogan authored
      Refactor kvm_mips_host_tlb_inv() to also be able to invalidate any
      matching TLB entry in the kernel ASID rather than assuming only the TLB
      entries in the user ASID can change. Two new bool user/kernel arguments
      allow the caller to indicate whether the mapping should affect each of
      the ASIDs for guest user/kernel mode.
      
      - kvm_mips_invalidate_guest_tlb() (used by TLBWI/TLBWR emulation) can
        now invalidate any corresponding TLB entry in both the kernel ASID
        (guest kernel may have accessed any guest mapping), and the user ASID
        if the entry being replaced is in guest USeg (where guest user may
        also have accessed it).
      
      - The tlbmod fault handler (and the KSeg0 / TLB mapped / commpage fault
        handlers in later patches) can now invalidate the corresponding TLB
        entry in whichever ASID is currently active, since only a single page
        table will have been updated anyway.
      Signed-off-by: default avatarJames Hogan <james.hogan@imgtec.com>
      Cc: Paolo Bonzini <pbonzini@redhat.com>
      Cc: "Radim Krčmář" <rkrcmar@redhat.com>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: linux-mips@linux-mips.org
      Cc: kvm@vger.kernel.org
      57e3869c
    • James Hogan's avatar
      KVM: MIPS/TLB: Fix off-by-one in TLB invalidate · f3a8603f
      James Hogan authored
      kvm_mips_host_tlb_inv() uses the TLBP instruction to probe the host TLB
      for an entry matching the given guest virtual address, and determines
      whether a match was found based on whether CP0_Index > 0. This is
      technically incorrect as an index of 0 (with the high bit clear) is a
      perfectly valid TLB index.
      
      This is harmless at the moment due to the use of at least 1 wired TLB
      entry for the KVM commpage, however we will soon be ridding ourselves of
      that particular wired entry so lets fix the condition in case the entry
      needing invalidation does land at TLB index 0.
      Signed-off-by: default avatarJames Hogan <james.hogan@imgtec.com>
      Cc: Paolo Bonzini <pbonzini@redhat.com>
      Cc: "Radim Krčmář" <rkrcmar@redhat.com>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: linux-mips@linux-mips.org
      Cc: kvm@vger.kernel.org
      f3a8603f
    • James Hogan's avatar
      KVM: MIPS: Add fast path TLB refill handler · a7cfa7ac
      James Hogan authored
      Use functions from the general MIPS TLB exception vector generation code
      (tlbex.c) to construct a fast path TLB refill handler similar to the
      general one, but cut down and capable of preserving K0 and K1.
      Signed-off-by: default avatarJames Hogan <james.hogan@imgtec.com>
      Cc: Paolo Bonzini <pbonzini@redhat.com>
      Cc: "Radim Krčmář" <rkrcmar@redhat.com>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: linux-mips@linux-mips.org
      Cc: kvm@vger.kernel.org
      a7cfa7ac
    • James Hogan's avatar
      KVM: MIPS: Support NetLogic KScratch registers · 29b500b5
      James Hogan authored
      tlbex.c uses the implementation dependent $22 CP0 register group on
      NetLogic cores, with the help of the c0_kscratch() helper. Allow these
      registers to be allocated by the KVM entry code too instead of assuming
      KScratch registers are all $31, which will also allow pgd_reg to be
      handled since it is allocated that way.
      
      We also drop the masking of kscratch_mask with 0xfc, as it is redundant
      for the standard KScratch registers (Config4.KScrExist won't have the
      low 2 bits set anyway), and apparently not necessary for NetLogic.
      Signed-off-by: default avatarJames Hogan <james.hogan@imgtec.com>
      Cc: Paolo Bonzini <pbonzini@redhat.com>
      Cc: "Radim Krčmář" <rkrcmar@redhat.com>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: linux-mips@linux-mips.org
      Cc: kvm@vger.kernel.org
      29b500b5
    • James Hogan's avatar
      KVM: MIPS/T&E: Activate GVA page tables in guest context · 7faa6eec
      James Hogan authored
      Activate the GVA page tables when in guest context. This will allow the
      normal Linux TLB refill handler to fill from it when guest memory is
      read, as well as preventing accidental reading from user memory.
      Signed-off-by: default avatarJames Hogan <james.hogan@imgtec.com>
      Cc: Paolo Bonzini <pbonzini@redhat.com>
      Cc: "Radim Krčmář" <rkrcmar@redhat.com>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: linux-mips@linux-mips.org
      Cc: kvm@vger.kernel.org
      7faa6eec
    • James Hogan's avatar
      KVM: MIPS/T&E: Allocate GVA -> HPA page tables · f7f1427d
      James Hogan authored
      Allocate GVA -> HPA page tables for guest kernel and guest user mode on
      each VCPU, to allow for fast path TLB refill handling to be added later.
      
      In the process kvm_arch_vcpu_init() needs updating to pass on any error
      from the vcpu_init() callback.
      Signed-off-by: default avatarJames Hogan <james.hogan@imgtec.com>
      Cc: Paolo Bonzini <pbonzini@redhat.com>
      Cc: "Radim Krčmář" <rkrcmar@redhat.com>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: linux-mips@linux-mips.org
      Cc: kvm@vger.kernel.org
      f7f1427d
    • James Hogan's avatar
      KVM: MIPS: Wire up vcpu uninit · 630766b3
      James Hogan authored
      Wire up a vcpu uninit implementation callback. This will be used for the
      clean up of GVA->HPA page tables.
      Signed-off-by: default avatarJames Hogan <james.hogan@imgtec.com>
      Cc: Paolo Bonzini <pbonzini@redhat.com>
      Cc: "Radim Krčmář" <rkrcmar@redhat.com>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: linux-mips@linux-mips.org
      Cc: kvm@vger.kernel.org
      630766b3
    • James Hogan's avatar
      KVM: MIPS/T&E: active_mm = init_mm in guest context · a7ebb2e4
      James Hogan authored
      Set init_mm as the active_mm and update mm_cpumask(current->mm) to
      reflect that it isn't active when in guest context. This prevents cache
      management code from attempting cache flushes on host virtual addresses
      while in guest context, for example due to a cache management IPIs or
      later when writing of dynamically translated code hits copy on write.
      
      We do this using helpers in static kernel code to avoid having to export
      init_mm to modules.
      Signed-off-by: default avatarJames Hogan <james.hogan@imgtec.com>
      Cc: Paolo Bonzini <pbonzini@redhat.com>
      Cc: "Radim Krčmář" <rkrcmar@redhat.com>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: linux-mips@linux-mips.org
      Cc: kvm@vger.kernel.org
      a7ebb2e4
    • James Hogan's avatar
      KVM: MIPS/T&E: Restore host asid on return to host · 91cdee57
      James Hogan authored
      We only need the guest ASID loaded while in guest context, i.e. while
      running guest code and while handling guest exits. We load the guest
      ASID when entering the guest, however we restore the host ASID later
      than necessary, when the VCPU state is saved i.e. vcpu_put() or slightly
      earlier if preempted after returning to the host.
      
      This mismatch is both unpleasant and causes redundant host ASID restores
      in kvm_trap_emul_vcpu_put(). Lets explicitly restore the host ASID when
      returning to the host, and don't bother restoring the host ASID on
      context switch in unless we're already in guest context.
      Signed-off-by: default avatarJames Hogan <james.hogan@imgtec.com>
      Cc: Paolo Bonzini <pbonzini@redhat.com>
      Cc: "Radim Krčmář" <rkrcmar@redhat.com>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: linux-mips@linux-mips.org
      Cc: kvm@vger.kernel.org
      91cdee57
    • James Hogan's avatar
      KVM: MIPS: Add vcpu_run() & vcpu_reenter() callbacks · a2c046e4
      James Hogan authored
      Add implementation callbacks for entering the guest (vcpu_run()) and
      reentering the guest (vcpu_reenter()), allowing implementation specific
      operations to be performed before entering the guest or after returning
      to the host without cluttering kvm_arch_vcpu_ioctl_run().
      
      This allows the T&E specific lazy user GVA flush to be moved into
      trap_emul.c, along with disabling of the HTW. We also move
      kvm_mips_deliver_interrupts() as VZ will need to restore the guest timer
      state prior to delivering interrupts.
      Signed-off-by: default avatarJames Hogan <james.hogan@imgtec.com>
      Cc: Paolo Bonzini <pbonzini@redhat.com>
      Cc: "Radim Krčmář" <rkrcmar@redhat.com>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: linux-mips@linux-mips.org
      Cc: kvm@vger.kernel.org
      a2c046e4
    • James Hogan's avatar
      KVM: MIPS: Remove duplicated ASIDs from vcpu · c550d539
      James Hogan authored
      The kvm_vcpu_arch structure contains both mm_structs for allocating MMU
      contexts (primarily the ASID) but it also copies the resulting ASIDs
      into guest_{user,kernel}_asid[] arrays which are referenced from uasm
      generated code.
      
      This duplication doesn't seem to serve any purpose, and it gets in the
      way of generalising the ASID handling across guest kernel/user modes, so
      lets just extract the ASID straight out of the mm_struct on demand, and
      in fact there are convenient cpu_context() and cpu_asid() macros for
      doing so.
      
      To reduce the verbosity of this code we do also add kern_mm and user_mm
      local variables where the kernel and user mm_structs are used.
      Signed-off-by: default avatarJames Hogan <james.hogan@imgtec.com>
      Cc: Paolo Bonzini <pbonzini@redhat.com>
      Cc: "Radim Krčmář" <rkrcmar@redhat.com>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: linux-mips@linux-mips.org
      Cc: kvm@vger.kernel.org
      c550d539
    • James Hogan's avatar
      KVM: MIPS/MMU: Move preempt/ASID handling to implementation · 1581ff3d
      James Hogan authored
      The MIPS KVM host and guest GVA ASIDs may need regenerating when
      scheduling a process in guest context, which is done from the
      kvm_arch_vcpu_load() / kvm_arch_vcpu_put() functions in mmu.c.
      
      However this is a fairly implementation specific detail. VZ for example
      may use GuestIDs instead of normal ASIDs to distinguish mappings
      belonging to different guests, and even on VZ without GuestID the root
      TLB will be used differently to trap & emulate.
      
      Trap & emulate GVA ASIDs only relate to the user part of the full
      address space, so can be left active during guest exit handling (guest
      context) to allow guest instructions to be easily read and translated.
      
      VZ root ASIDs however are for GPA mappings so can't be left active
      during normal kernel code. They also aren't useful for accessing guest
      virtual memory, and we should have CP0_BadInstr[P] registers available
      to provide encodings of trapping guest instructions anyway.
      
      Therefore move the ASID preemption handling into the implementation
      callback.
      Signed-off-by: default avatarJames Hogan <james.hogan@imgtec.com>
      Cc: Paolo Bonzini <pbonzini@redhat.com>
      Cc: "Radim Krčmář" <rkrcmar@redhat.com>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: linux-mips@linux-mips.org
      Cc: kvm@vger.kernel.org
      1581ff3d
    • James Hogan's avatar
      KVM: MIPS: Convert get/set_regs -> vcpu_load/put · a60b8438
      James Hogan authored
      Convert the get_regs() and set_regs() callbacks to vcpu_load() and
      vcpu_put(), which provide a cpu argument and more closely match the
      kvm_arch_vcpu_load() / kvm_arch_vcpu_put() that they are called by.
      
      This is in preparation for moving ASID management into the
      implementations.
      Signed-off-by: default avatarJames Hogan <james.hogan@imgtec.com>
      Cc: Paolo Bonzini <pbonzini@redhat.com>
      Cc: "Radim Krčmář" <rkrcmar@redhat.com>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: linux-mips@linux-mips.org
      Cc: kvm@vger.kernel.org
      a60b8438
    • James Hogan's avatar
      KVM: MIPS/MMU: Simplify ASID restoration · 1534b396
      James Hogan authored
      KVM T&E uses an ASID for guest kernel mode and an ASID for guest user
      mode. The current ASID is saved when the guest is scheduled out, and
      restored when scheduling back in, with checks for whether the ASID needs
      to be regenerated.
      
      This isn't really necessary as the ASID can be easily determined by the
      current guest mode, so lets simplify it to just read the required ASID
      from guest_kernel_asid or guest_user_asid even if the ASID hasn't been
      regenerated.
      Signed-off-by: default avatarJames Hogan <james.hogan@imgtec.com>
      Cc: Paolo Bonzini <pbonzini@redhat.com>
      Cc: "Radim Krčmář" <rkrcmar@redhat.com>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: linux-mips@linux-mips.org
      Cc: kvm@vger.kernel.org
      1534b396
    • James Hogan's avatar
      KVM: MIPS: Drop partial KVM_NMI implementation · 00104b41
      James Hogan authored
      MIPS incompletely implements the KVM_NMI ioctl to supposedly perform a
      CPU reset, but all it actually does is invalidate the ASIDs. It doesn't
      expose the KVM_CAP_USER_NMI capability which is supposed to indicate the
      presence of the KVM_NMI ioctl, and no user software actually uses it on
      MIPS.
      
      Since this is dead code that would technically need updating for GVA
      page table handling in upcoming patches, remove it now. If we wanted to
      implement NMI injection later it can always be done properly along with
      the KVM_CAP_USER_NMI capability, and if we wanted to implement a proper
      CPU reset it would be better done with a separate ioctl.
      Signed-off-by: default avatarJames Hogan <james.hogan@imgtec.com>
      Cc: Paolo Bonzini <pbonzini@redhat.com>
      Cc: "Radim Krčmář" <rkrcmar@redhat.com>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: linux-mips@linux-mips.org
      Cc: kvm@vger.kernel.org
      00104b41
    • James Hogan's avatar
      Merge MIPS prerequisites · adb0b25f
      James Hogan authored
      Merge in MIPS prerequisites from GVA page tables and GPA page tables
      series. The same branch can also merge into the MIPS tree.
      Signed-off-by: default avatarJames Hogan <james.hogan@imgtec.com>
      adb0b25f
    • James Hogan's avatar
      MIPS: Add return errors to protected cache ops · 7170bdc7
      James Hogan authored
      The protected cache ops contain no out of line fixup code to return an
      error code in the event of a fault, with the cache op being skipped in
      that case. For KVM however we'd like to detect this case as page
      faulting will be disabled so it could happen during normal operation if
      the GVA page tables were flushed, and need to be handled by the caller.
      
      Add the out-of-line fixup code to load the error value -EFAULT into the
      return variable, and adapt the protected cache line functions to pass
      the error back to the caller.
      Signed-off-by: default avatarJames Hogan <james.hogan@imgtec.com>
      Acked-by: default avatarRalf Baechle <ralf@linux-mips.org>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: Paolo Bonzini <pbonzini@redhat.com>
      Cc: "Radim Krčmář" <rkrcmar@redhat.com>
      Cc: linux-mips@linux-mips.org
      Cc: kvm@vger.kernel.org
      7170bdc7
    • James Hogan's avatar
      MIPS: Export some tlbex internals for KVM to use · 722b4544
      James Hogan authored
      Export to TLB exception code generating functions so that KVM can
      construct a fast TLB refill handler for guest context without
      reinventing the wheel quite so much.
      Signed-off-by: default avatarJames Hogan <james.hogan@imgtec.com>
      Acked-by: default avatarRalf Baechle <ralf@linux-mips.org>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: Paolo Bonzini <pbonzini@redhat.com>
      Cc: "Radim Krčmář" <rkrcmar@redhat.com>
      Cc: linux-mips@linux-mips.org
      Cc: kvm@vger.kernel.org
      722b4544
    • James Hogan's avatar
      MIPS: uasm: Add include guards in asm/uasm.h · 93a93c24
      James Hogan authored
      Add include guards in asm/uasm.h to allow it to be safely used by a new
      header asm/tlbex.h in the next patch to expose TLB exception building
      functions for KVM to use.
      Signed-off-by: default avatarJames Hogan <james.hogan@imgtec.com>
      Acked-by: default avatarRalf Baechle <ralf@linux-mips.org>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: Paolo Bonzini <pbonzini@redhat.com>
      Cc: "Radim Krčmář" <rkrcmar@redhat.com>
      Cc: linux-mips@linux-mips.org
      Cc: kvm@vger.kernel.org
      93a93c24
    • James Hogan's avatar
      MIPS: Export pgd/pmd symbols for KVM · ccf01516
      James Hogan authored
      Export pmd_init(), invalid_pmd_table and tlbmiss_handler_setup_pgd to
      GPL kernel modules so that MIPS KVM can use the inline page table
      management functions and switch between page tables:
      
      - pmd_init() will be used directly by KVM to initialise newly allocated
        pmd tables with invalid lower level table pointers.
      
      - invalid_pmd_table is used by pud_present(), pud_none(), and
        pud_clear(), which KVM will use to test and clear pud entries.
      
      - tlbmiss_handler_setup_pgd() will be called by KVM entry code to switch
        to the appropriate GVA page tables.
      Signed-off-by: default avatarJames Hogan <james.hogan@imgtec.com>
      Acked-by: default avatarRalf Baechle <ralf@linux-mips.org>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: Paolo Bonzini <pbonzini@redhat.com>
      Cc: "Radim Krčmář" <rkrcmar@redhat.com>
      Cc: linux-mips@linux-mips.org
      Cc: kvm@vger.kernel.org
      ccf01516
  2. 02 Feb, 2017 2 commits
  3. 20 Jan, 2017 1 commit
  4. 17 Jan, 2017 2 commits
  5. 16 Jan, 2017 3 commits
  6. 15 Jan, 2017 8 commits
    • Linus Torvalds's avatar
      Merge tag 'char-misc-4.10-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc · c9281627
      Linus Torvalds authored
      Pull char/misc driver fixes from Greg KH:
       "Here are some small char/misc driver fixes for 4.10-rc4 that resolve
        some reported issues.
      
        The MEI driver issue resolves a lot of problems that people have been
        having, as does the mem driver fix. The other minor fixes resolve
        other reported issues.
      
        All of these have been in linux-next for a while"
      
      * tag 'char-misc-4.10-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
        vme: Fix wrong pointer utilization in ca91cx42_slave_get
        auxdisplay: fix new ht16k33 build errors
        ppdev: don't print a free'd string
        extcon: return error code on failure
        drivers: char: mem: Fix thinkos in kmem address checks
        mei: bus: enable OS version only for SPT and newer
      c9281627
    • Linus Torvalds's avatar
      Merge tag 'driver-core-4.10-rc4' of... · 2d5a7101
      Linus Torvalds authored
      Merge tag 'driver-core-4.10-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
      
      Pull driver core fix from Greg KH:
       "Here is a single patch being reverted to remove a feature that was
        added in 4.10-rc1 that isn't quite ready for release.
      
        It will be redone as a debugfs file instead of a sysfs file in the
        future"
      
      * tag 'driver-core-4.10-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
        Revert "driver core: Add deferred_probe attribute to devices in sysfs"
      2d5a7101
    • Linus Torvalds's avatar
      Merge tag 'tty-4.10-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty · 7f138b97
      Linus Torvalds authored
      Pull tty/serial fixes from Greg KH:
       "Here are some small tty/serial driver fixes for 4.10-rc4 to resolve a
        number of reported issues.
      
        Nothing major here at all, one revert of a problematic patch, and some
        other tiny bugfixes. Full details are in the shortlog below.
      
        All have been in linux-next with no reported issues"
      
      * tag 'tty-4.10-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
        sysrq: attach sysrq handler correctly for 32-bit kernel
        Revert "tty: serial: 8250: add CON_CONSDEV to flags"
        Clearing FIFOs in RS485 emulation mode causes subsequent transmits to break
        8250_pci: Fix potential use-after-free in error path
        tty/serial: atmel: RS485 half duplex w/DMA: enable RX after TX is done
        tty/serial: atmel_serial: BUG: stop DMA from transmitting in stop_tx
      7f138b97
    • Linus Torvalds's avatar
      Merge tag 'usb-4.10-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb · 793e039e
      Linus Torvalds authored
      Pull USB fixes from Greg KH:
       "Here are a few small USB driver fixes for 4.10-rc4 to resolve some
        reported issues.
      
        The "largest" here is a number of bugs being fixed in the ch341
        usb-serial driver, to hopefully resolve the mess of different devices
        floating around that use this driver that have been having problems
        with the 4.10-rc1 release.
      
        There's also a tiny musb fix that I missed in the last pull request,
        as well as the traditional xhci fix rounding out the batch.
      
        All have been in linux-next with no reported issues"
      
      * tag 'usb-4.10-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
        xhci: fix deadlock at host remove by running watchdog correctly
        USB: serial: ch341: fix control-message error handling
        usb: musb: fix runtime PM in debugfs
        wusbcore: Fix one more crypto-on-the-stack bug
        USB: serial: kl5kusb105: fix line-state error handling
        USB: serial: ch341: fix baud rate and line-control handling
        USB: serial: ch341: fix line settings after reset-resume
        USB: serial: ch341: fix resume after reset
        USB: serial: ch341: fix open error handling
        USB: serial: ch341: fix modem-control and B0 handling
        USB: serial: ch341: fix open and resume after B0
        USB: serial: ch341: fix initial modem-control state
      793e039e
    • Linus Torvalds's avatar
      Merge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux · aa2797b3
      Linus Torvalds authored
      Pull i2c fixes from Wolfram Sang:
       "Bugfixes for I2C. Mostly core this time which is a bit unusual but
        nothing really scary in there"
      
      * 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
        i2c: piix4: Avoid race conditions with IMC
        i2c: fix spelling mistake: "insufficent" -> "insufficient"
        i2c: print correct device invalid address
        i2c: do not enable fall back to Host Notify by default
        i2c: fix kernel memory disclosure in dev interface
      aa2797b3
    • Linus Torvalds's avatar
      Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 83346fbc
      Linus Torvalds authored
      Pull x86 fixes from Ingo Molnar:
       "Misc fixes:
      
         - unwinder fixes
         - AMD CPU topology enumeration fixes
         - microcode loader fixes
         - x86 embedded platform fixes
         - fix for a bootup crash that may trigger when clearcpuid= is used
           with invalid values"
      
      * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/mpx: Use compatible types in comparison to fix sparse error
        x86/tsc: Add the Intel Denverton Processor to native_calibrate_tsc()
        x86/entry: Fix the end of the stack for newly forked tasks
        x86/unwind: Include __schedule() in stack traces
        x86/unwind: Disable KASAN checks for non-current tasks
        x86/unwind: Silence warnings for non-current tasks
        x86/microcode/intel: Use correct buffer size for saving microcode data
        x86/microcode/intel: Fix allocation size of struct ucode_patch
        x86/microcode/intel: Add a helper which gives the microcode revision
        x86/microcode: Use native CPUID to tickle out microcode revision
        x86/CPU: Add native CPUID variants returning a single datum
        x86/boot: Add missing declaration of string functions
        x86/CPU/AMD: Fix Bulldozer topology
        x86/platform/intel-mid: Rename 'spidev' to 'mrfld_spidev'
        x86/cpu: Fix typo in the comment for Anniedale
        x86/cpu: Fix bootup crashes by sanitizing the argument of the 'clearcpuid=' command-line option
      83346fbc
    • Linus Torvalds's avatar
      Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · a11ce3a4
      Linus Torvalds authored
      Pull NOHZ fix from Ingo Molnar:
       "This fixes an old NOHZ race where we incorrectly calculate the next
        timer interrupt in certain circumstances where hrtimers are pending,
        that can cause hard to reproduce stalled-values artifacts in
        /proc/stat"
      
      * 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        nohz: Fix collision between tick and other hrtimers
      a11ce3a4
    • Linus Torvalds's avatar
      Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 79078c53
      Linus Torvalds authored
      Pull perf fixes from Ingo Molnar:
       "Misc race fixes uncovered by fuzzing efforts, a Sparse fix, two PMU
        driver fixes, plus miscellanous tooling fixes"
      
      * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        perf/x86: Reject non sampling events with precise_ip
        perf/x86/intel: Account interrupts for PEBS errors
        perf/core: Fix concurrent sys_perf_event_open() vs. 'move_group' race
        perf/core: Fix sys_perf_event_open() vs. hotplug
        perf/x86/intel: Use ULL constant to prevent undefined shift behaviour
        perf/x86/intel/uncore: Fix hardcoded socket 0 assumption in the Haswell init code
        perf/x86: Set pmu->module in Intel PMU modules
        perf probe: Fix to probe on gcc generated symbols for offline kernel
        perf probe: Fix --funcs to show correct symbols for offline module
        perf symbols: Robustify reading of build-id from sysfs
        perf tools: Install tools/lib/traceevent plugins with install-bin
        tools lib traceevent: Fix prev/next_prio for deadline tasks
        perf record: Fix --switch-output documentation and comment
        perf record: Make __record_options static
        tools lib subcmd: Add OPT_STRING_OPTARG_SET option
        perf probe: Fix to get correct modname from elf header
        samples/bpf trace_output_user: Remove duplicate sys/ioctl.h include
        samples/bpf sock_example: Avoid getting ethhdr from two includes
        perf sched timehist: Show total scheduling time
      79078c53