1. 09 Nov, 2018 3 commits
    • Juergen Gross's avatar
      xen: remove size limit of privcmd-buf mapping interface · 3941552a
      Juergen Gross authored
      Currently the size of hypercall buffers allocated via
      /dev/xen/hypercall is limited to a default of 64 memory pages. For live
      migration of guests this might be too small as the page dirty bitmask
      needs to be sized according to the size of the guest. This means
      migrating a 8GB sized guest is already exhausting the default buffer
      size for the dirty bitmap.
      
      There is no sensible way to set a sane limit, so just remove it
      completely. The device node's usage is limited to root anyway, so there
      is no additional DOS scenario added by allowing unlimited buffers.
      
      While at it make the error path for the -ENOMEM case a little bit
      cleaner by setting n_pages to the number of successfully allocated
      pages instead of the target size.
      
      Fixes: c51b3c63 ("xen: add new hypercall buffer mapping device")
      Cc: <stable@vger.kernel.org> #4.18
      Signed-off-by: default avatarJuergen Gross <jgross@suse.com>
      Reviewed-by: default avatarBoris Ostrovsky <boris.ostrovsky@oracle.com>
      Signed-off-by: default avatarJuergen Gross <jgross@suse.com>
      3941552a
    • Juergen Gross's avatar
      xen: fix xen_qlock_wait() · d3132b38
      Juergen Gross authored
      Commit a8565319 ("xen: make xen_qlock_wait() nestable")
      introduced a regression for Xen guests running fully virtualized
      (HVM or PVH mode). The Xen hypervisor wouldn't return from the poll
      hypercall with interrupts disabled in case of an interrupt (for PV
      guests it does).
      
      So instead of disabling interrupts in xen_qlock_wait() use a nesting
      counter to avoid calling xen_clear_irq_pending() in case
      xen_qlock_wait() is nested.
      
      Fixes: a8565319 ("xen: make xen_qlock_wait() nestable")
      Cc: stable@vger.kernel.org
      Reported-by: default avatarSander Eikelenboom <linux@eikelenboom.it>
      Signed-off-by: default avatarJuergen Gross <jgross@suse.com>
      Reviewed-by: default avatarBoris Ostrovsky <boris.ostrovsky@oracle.com>
      Tested-by: default avatarSander Eikelenboom <linux@eikelenboom.it>
      Signed-off-by: default avatarJuergen Gross <jgross@suse.com>
      d3132b38
    • Juergen Gross's avatar
      x86/xen: fix pv boot · 1457d8cf
      Juergen Gross authored
      Commit 9da3f2b7 ("x86/fault: BUG() when uaccess helpers fault on
      kernel addresses") introduced a regression for booting Xen PV guests.
      
      Xen PV guests are using __put_user() and __get_user() for accessing the
      p2m map (physical to machine frame number map) as accesses might fail
      in case of not populated areas of the map.
      
      With above commit using __put_user() and __get_user() for accessing
      kernel pages is no longer valid. So replace the Xen hack by adding
      appropriate p2m access functions using the default fixup handler.
      
      Fixes: 9da3f2b7 ("x86/fault: BUG() when uaccess helpers fault on kernel addresses")
      Signed-off-by: default avatarJuergen Gross <jgross@suse.com>
      Reviewed-by: default avatarAndrew Cooper <andrew.cooper3@citrix.com>
      Signed-off-by: default avatarJuergen Gross <jgross@suse.com>
      1457d8cf
  2. 06 Nov, 2018 2 commits
  3. 02 Nov, 2018 1 commit
    • Stefano Stabellini's avatar
      CONFIG_XEN_PV breaks xen_create_contiguous_region on ARM · f9005571
      Stefano Stabellini authored
      xen_create_contiguous_region has now only an implementation if
      CONFIG_XEN_PV is defined. However, on ARM we never set CONFIG_XEN_PV but
      we do have an implementation of xen_create_contiguous_region which is
      required for swiotlb-xen to work correctly (although it just sets
      *dma_handle).
      
      Cc: <stable@vger.kernel.org> # 4.12
      Fixes: 16624390 ("xen: create xen_create/destroy_contiguous_region() stubs for PVHVM only builds")
      Signed-off-by: default avatarStefano Stabellini <stefanos@xilinx.com>
      Reviewed-by: default avatarJuergen Gross <jgross@suse.com>
      CC: Jeff.Kubascik@dornerworks.com
      CC: Jarvis.Roach@dornerworks.com
      CC: Nathan.Studer@dornerworks.com
      CC: vkuznets@redhat.com
      CC: boris.ostrovsky@oracle.com
      CC: jgross@suse.com
      CC: julien.grall@arm.com
      Signed-off-by: default avatarJuergen Gross <jgross@suse.com>
      f9005571
  4. 26 Oct, 2018 2 commits
  5. 24 Oct, 2018 12 commits
    • Stefano Stabellini's avatar
      add myself as reviewer for Xen support in Linux · 769d6bfc
      Stefano Stabellini authored
      It would be good for me to keep an eye on the patches that touch Xen
      support in Linux to try to spot changes that break Xen on ARM early on.
      Signed-off-by: default avatarStefano Stabellini <sstabellini@kernel.org>
      Reviewed-by: default avatarBoris Ostrovsky <boris.ostrovsky@oracle.com>
      Signed-off-by: default avatarJuergen Gross <jgross@suse.com>
      769d6bfc
    • Bartlomiej Zolnierkiewicz's avatar
      xen: remove redundant 'default n' from Kconfig · f1db0050
      Bartlomiej Zolnierkiewicz authored
      'default n' is the default value for any bool or tristate Kconfig
      setting so there is no need to write it explicitly.
      
      Also since commit f467c564 ("kconfig: only write '# CONFIG_FOO
      is not set' for visible symbols") the Kconfig behavior is the same
      regardless of 'default n' being present or not:
      
          ...
          One side effect of (and the main motivation for) this change is making
          the following two definitions behave exactly the same:
      
              config FOO
                      bool
      
              config FOO
                      bool
                      default n
      
          With this change, neither of these will generate a
          '# CONFIG_FOO is not set' line (assuming FOO isn't selected/implied).
          That might make it clearer to people that a bare 'default n' is
          redundant.
          ...
      Signed-off-by: default avatarBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
      Reviewed-by: default avatarJuergen Gross <jgross@suse.com>
      Signed-off-by: default avatarJuergen Gross <jgross@suse.com>
      f1db0050
    • Boris Ostrovsky's avatar
      xen/balloon: Support xend-based toolstack · 3aa6c19d
      Boris Ostrovsky authored
      Xend-based toolstacks don't have static-max entry in xenstore. The
      equivalent node for those toolstacks is memory_static_max.
      
      Fixes: 5266b8e4 (xen: fix booting ballooned down hvm guest)
      Signed-off-by: default avatarBoris Ostrovsky <boris.ostrovsky@oracle.com>
      Cc: <stable@vger.kernel.org> # 4.13
      Reviewed-by: default avatarJuergen Gross <jgross@suse.com>
      Signed-off-by: default avatarJuergen Gross <jgross@suse.com>
      3aa6c19d
    • Roger Pau Monne's avatar
      xen/pvh: increase early stack size · 7deecbda
      Roger Pau Monne authored
      While booting on an AMD EPYC box the stack canary would detect stack
      overflows when using the current PVH early stack size (256). Switch to
      using the value defined by BOOT_STACK_SIZE, which prevents the stack
      overflow.
      
      Cc: <stable@vger.kernel.org> # 4.11
      Signed-off-by: default avatarRoger Pau Monné <roger.pau@citrix.com>
      Reviewed-by: default avatarJuergen Gross <jgross@suse.com>
      Signed-off-by: default avatarJuergen Gross <jgross@suse.com>
      7deecbda
    • Juergen Gross's avatar
      xen: make xen_qlock_wait() nestable · a8565319
      Juergen Gross authored
      xen_qlock_wait() isn't safe for nested calls due to interrupts. A call
      of xen_qlock_kick() might be ignored in case a deeper nesting level
      was active right before the call of xen_poll_irq():
      
      CPU 1:                                   CPU 2:
      spin_lock(lock1)
                                               spin_lock(lock1)
                                               -> xen_qlock_wait()
                                                  -> xen_clear_irq_pending()
                                                  Interrupt happens
      spin_unlock(lock1)
      -> xen_qlock_kick(CPU 2)
      spin_lock_irqsave(lock2)
                                               spin_lock_irqsave(lock2)
                                               -> xen_qlock_wait()
                                                  -> xen_clear_irq_pending()
                                                     clears kick for lock1
                                                  -> xen_poll_irq()
      spin_unlock_irq_restore(lock2)
      -> xen_qlock_kick(CPU 2)
                                                  wakes up
                                               spin_unlock_irq_restore(lock2)
                                               IRET
                                                 resumes in xen_qlock_wait()
                                                 -> xen_poll_irq()
                                                 never wakes up
      
      The solution is to disable interrupts in xen_qlock_wait() and not to
      poll for the irq in case xen_qlock_wait() is called in nmi context.
      
      Cc: stable@vger.kernel.org
      Cc: Waiman.Long@hp.com
      Cc: peterz@infradead.org
      Signed-off-by: default avatarJuergen Gross <jgross@suse.com>
      Reviewed-by: default avatarJan Beulich <jbeulich@suse.com>
      Signed-off-by: default avatarJuergen Gross <jgross@suse.com>
      a8565319
    • Juergen Gross's avatar
      xen: fix race in xen_qlock_wait() · 2ac2a7d4
      Juergen Gross authored
      In the following situation a vcpu waiting for a lock might not be
      woken up from xen_poll_irq():
      
      CPU 1:                CPU 2:                      CPU 3:
      takes a spinlock
                            tries to get lock
                            -> xen_qlock_wait()
      frees the lock
      -> xen_qlock_kick(cpu2)
                              -> xen_clear_irq_pending()
      
      takes lock again
                                                        tries to get lock
                                                        -> *lock = _Q_SLOW_VAL
                              -> *lock == _Q_SLOW_VAL ?
                              -> xen_poll_irq()
      frees the lock
      -> xen_qlock_kick(cpu3)
      
      And cpu 2 will sleep forever.
      
      This can be avoided easily by modifying xen_qlock_wait() to call
      xen_poll_irq() only if the related irq was not pending and to call
      xen_clear_irq_pending() only if it was pending.
      
      Cc: stable@vger.kernel.org
      Cc: Waiman.Long@hp.com
      Cc: peterz@infradead.org
      Signed-off-by: default avatarJuergen Gross <jgross@suse.com>
      Reviewed-by: default avatarJan Beulich <jbeulich@suse.com>
      Signed-off-by: default avatarJuergen Gross <jgross@suse.com>
      2ac2a7d4
    • Geert Uytterhoeven's avatar
      af320de9
    • Jason Andryuk's avatar
      xen: Make XEN_BACKEND selectable by DomU · ea9e57d0
      Jason Andryuk authored
      XEN_BACKEND doesn't actually depend on XEN_DOM0.  DomUs can serve
      backends to other DomUs.  One example is a service VM providing network
      backends.
      
      The original Kconfig defaulted Dom0 to y and it could be disabled.  DomU
      could not select the option.  With the new Kconfig, we default y for
      Dom0 and n for DomU.  Either can then toggle the selection.
      Signed-off-by: default avatarJason Andryuk <jandryuk@gmail.com>
      Reviewed-by: default avatarBoris Ostrovsky <boris.ostrovsky@oracle.com>
      Signed-off-by: default avatarJuergen Gross <jgross@suse.com>
      ea9e57d0
    • Linus Torvalds's avatar
      net/kconfig: Make QCOM_QMI_HELPERS available when COMPILE_TEST · a978a5b8
      Linus Torvalds authored
      The networking merge brought in the experimental support for the
      Qualcomm ath10k system NOC, which selects QCOM_QMI_HELPERS as a
      dependency.
      
      But the ATH10K_SNOC option (which selects QCOM_QMI_HELPERS) depends on
      ARCH_QCOM || COMPILE_TEST in order to get wider build testing than just
      the unusual QCOM architecture build, while the QCOM_QMI_HELPERS option
      doesn't have that COMPILE_TEST option and is limited to only ARCH_QCOM.
      
      As a result, a "make allmodconfig" complains
      
        WARNING: unmet direct dependencies detected for QCOM_QMI_HELPERS
          Depends on [n]: ARCH_QCOM && NET [=y]
          Selected by [m]:
          - ATH10K_SNOC [=m] && NETDEVICES [=y] && WLAN [=y] && WLAN_VENDOR_ATH [=y] && ATH10K [=m] && (ARCH_QCOM || COMPILE_TEST [=y])
      
      Fix the config-time warning by making QCOM_QMI_HELPERS available when
      COMPILE_TEST, since the result seems to build fine.
      
      Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
      Cc: Govind Singh <govinds@codeaurora.org>
      Cc: Kalle Valo <kvalo@codeaurora.org>
      Cc: David Miller <davem@davemloft.net>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      a978a5b8
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next · 50b825d7
      Linus Torvalds authored
      Pull networking updates from David Miller:
      
       1) Add VF IPSEC offload support in ixgbe, from Shannon Nelson.
      
       2) Add zero-copy AF_XDP support to i40e, from Björn Töpel.
      
       3) All in-tree drivers are converted to {g,s}et_link_ksettings() so we
          can get rid of the {g,s}et_settings ethtool callbacks, from Michal
          Kubecek.
      
       4) Add software timestamping to veth driver, from Michael Walle.
      
       5) More work to make packet classifiers and actions lockless, from Vlad
          Buslov.
      
       6) Support sticky FDB entries in bridge, from Nikolay Aleksandrov.
      
       7) Add ipv6 version of IP_MULTICAST_ALL sockopt, from Andre Naujoks.
      
       8) Support batching of XDP buffers in vhost_net, from Jason Wang.
      
       9) Add flow dissector BPF hook, from Petar Penkov.
      
      10) i40e vf --> generic iavf conversion, from Jesse Brandeburg.
      
      11) Add NLA_REJECT netlink attribute policy type, to signal when users
          provide attributes in situations which don't make sense. From
          Johannes Berg.
      
      12) Switch TCP and fair-queue scheduler over to earliest departure time
          model. From Eric Dumazet.
      
      13) Improve guest receive performance by doing rx busy polling in tx
          path of vhost networking driver, from Tonghao Zhang.
      
      14) Add per-cgroup local storage to bpf
      
      15) Add reference tracking to BPF, from Joe Stringer. The verifier can
          now make sure that references taken to objects are properly released
          by the program.
      
      16) Support in-place encryption in TLS, from Vakul Garg.
      
      17) Add new taprio packet scheduler, from Vinicius Costa Gomes.
      
      18) Lots of selftests additions, too numerous to mention one by one here
          but all of which are very much appreciated.
      
      19) Support offloading of eBPF programs containing BPF to BPF calls in
          nfp driver, frm Quentin Monnet.
      
      20) Move dpaa2_ptp driver out of staging, from Yangbo Lu.
      
      21) Lots of u32 classifier cleanups and simplifications, from Al Viro.
      
      22) Add new strict versions of netlink message parsers, and enable them
          for some situations. From David Ahern.
      
      23) Evict neighbour entries on carrier down, also from David Ahern.
      
      24) Support BPF sk_msg verdict programs with kTLS, from Daniel Borkmann
          and John Fastabend.
      
      25) Add support for filtering route dumps, from David Ahern.
      
      26) New igc Intel driver for 2.5G parts, from Sasha Neftin et al.
      
      27) Allow vxlan enslavement to bridges in mlxsw driver, from Ido
          Schimmel.
      
      28) Add queue and stack map types to eBPF, from Mauricio Vasquez B.
      
      29) Add back byte-queue-limit support to r8169, with all the bug fixes
          in other areas of the driver it works now! From Florian Westphal and
          Heiner Kallweit.
      
      * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (2147 commits)
        tcp: add tcp_reset_xmit_timer() helper
        qed: Fix static checker warning
        Revert "be2net: remove desc field from be_eq_obj"
        Revert "net: simplify sock_poll_wait"
        net: socionext: Reset tx queue in ndo_stop
        net: socionext: Add dummy PHY register read in phy_write()
        net: socionext: Stop PHY before resetting netsec
        net: stmmac: Set OWN bit for jumbo frames
        arm64: dts: stratix10: Support Ethernet Jumbo frame
        tls: Add maintainers
        net: ethernet: ti: cpsw: unsync mcast entries while switch promisc mode
        octeontx2-af: Support for NIXLF's UCAST/PROMISC/ALLMULTI modes
        octeontx2-af: Support for setting MAC address
        octeontx2-af: Support for changing RSS algorithm
        octeontx2-af: NIX Rx flowkey configuration for RSS
        octeontx2-af: Install ucast and bcast pkt forwarding rules
        octeontx2-af: Add LMAC channel info to NIXLF_ALLOC response
        octeontx2-af: NPC MCAM and LDATA extract minimal configuration
        octeontx2-af: Enable packet length and csum validation
        octeontx2-af: Support for VTAG strip and capture
        ...
      50b825d7
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc · a97a2d4d
      Linus Torvalds authored
      Pull sparc updates from David Miller:
       "Mostly VDSO cleanups and optimizations"
      
      * git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
        sparc: Several small VDSO vclock_gettime.c improvements.
        sparc: Validate VDSO for undefined symbols.
        sparc: Really use linker with LDFLAGS.
        sparc: Improve VDSO CFLAGS.
        sparc: Set DISABLE_BRANCH_PROFILING in VDSO CFLAGS.
        sparc: Don't bother masking out TICK_PRIV_BIT in VDSO code.
        sparc: Inline VDSO gettime code aggressively.
        sparc: Improve VDSO instruction patching.
        sparc: Fix parport build warnings.
      a97a2d4d
    • Eric Dumazet's avatar
      tcp: add tcp_reset_xmit_timer() helper · 3f80e08f
      Eric Dumazet authored
      With EDT model, SRTT no longer is inflated by pacing delays.
      
      This means that RTO and some other xmit timers might be setup
      incorrectly. This is particularly visible with either :
      
      - Very small enforced pacing rates (SO_MAX_PACING_RATE)
      - Reduced rto (from the default 200 ms)
      
      This can lead to TCP flows aborts in the worst case,
      or spurious retransmits in other cases.
      
      For example, this session gets far more throughput
      than the requested 80kbit :
      
      $ netperf -H 127.0.0.2 -l 100 -- -q 10000
      MIGRATED TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 127.0.0.2 () port 0 AF_INET
      Recv   Send    Send
      Socket Socket  Message  Elapsed
      Size   Size    Size     Time     Throughput
      bytes  bytes   bytes    secs.    10^6bits/sec
      
      540000 262144 262144    104.00      2.66
      
      With the fix :
      
      $ netperf -H 127.0.0.2 -l 100 -- -q 10000
      MIGRATED TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 127.0.0.2 () port 0 AF_INET
      Recv   Send    Send
      Socket Socket  Message  Elapsed
      Size   Size    Size     Time     Throughput
      bytes  bytes   bytes    secs.    10^6bits/sec
      
      540000 262144 262144    104.00      0.12
      
      EDT allows for better control of rtx timers, since TCP has
      a better idea of the earliest departure time of each skb
      in the rtx queue. We only have to eventually add to the
      timer the difference of the EDT time with current time.
      Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      3f80e08f
  6. 23 Oct, 2018 20 commits
    • Linus Torvalds's avatar
      Merge branch 'parisc-4.20-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux · 44786880
      Linus Torvalds authored
      Pull parisc updates from Helge Deller:
       "Lots of small fixes and enhancements, most noteably:
      
         - Many TLB and cache flush optimizations (Dave)
      
         - Fixed HPMC/crash handler on 64-bit kernel (Dave and myself)
      
         - Added alternative infrastructre. The kernel now live-patches itself
           for various situations, e.g. replace SMP code when running on one
           CPU only or drop cache flushes when system has no cache installed.
      
         - vmlinuz now contains a full copy of the compressed vmlinux file.
           This simplifies debugging the currently booted kernel.
      
         - Unused driver removal (Christoph)
      
         - Reduced warnings of Dino PCI bridge when running in qemu
      
         - Removed gcc version check (Masahiro)"
      
      * 'parisc-4.20-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux: (23 commits)
        parisc: Retrieve and display the PDC PAT capabilities
        parisc: Optimze cache flush algorithms
        parisc: Remove pte_inserted define
        parisc: Add PDC PAT cell_info() and pd_get_pdc_revisions() functions
        parisc: Drop two instructions from pte lookup code
        parisc: Use zdep for shlw macro on PA1.1 and PA2.0
        parisc: Add alternative coding infrastructure
        parisc: Include compressed vmlinux file in vmlinuz boot kernel
        extract-vmlinux: Check for uncompressed image as fallback
        parisc: Fix address in HPMC IVA
        parisc: Fix exported address of os_hpmc handler
        parisc: Fix map_pages() to not overwrite existing pte entries
        parisc: Purge TLB entries after updating page table entry and set page accessed flag in TLB handler
        parisc: Release spinlocks using ordered store
        parisc: Ratelimit dino stuck interrupt warnings
        parisc: dino: Utilize DINO_MASK_IRQ() macro
        parisc: Clean up crash header output
        parisc: Add SYSTEM_INFO and REGISTER TOC PAT functions
        parisc: Remove PTE load and fault check from L2_ptep macro
        parisc: Reorder TLB flush timing calculation
        ...
      44786880
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm · 07171da2
      Linus Torvalds authored
      Pull ARM updates from Russell King:
       "The main item in this pull request are the Spectre variant 1.1 fixes
        from Julien Thierry.
      
        A few other patches to improve various areas, and removal of some
        obsolete mcount bits and a redundant kbuild conditional"
      
      * 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm:
        ARM: 8802/1: Call syscall_trace_exit even when system call skipped
        ARM: 8797/1: spectre-v1.1: harden __copy_to_user
        ARM: 8796/1: spectre-v1,v1.1: provide helpers for address sanitization
        ARM: 8795/1: spectre-v1.1: use put_user() for __put_user()
        ARM: 8794/1: uaccess: Prevent speculative use of the current addr_limit
        ARM: 8793/1: signal: replace __put_user_error with __put_user
        ARM: 8792/1: oabi-compat: copy oabi events using __copy_to_user()
        ARM: 8791/1: vfp: use __copy_to_user() when saving VFP state
        ARM: 8790/1: signal: always use __copy_to_user to save iwmmxt context
        ARM: 8789/1: signal: copy registers using __copy_to_user()
        ARM: 8801/1: makefile: use ARMv3M mode for RiscPC
        ARM: 8800/1: use choice for kernel unwinders
        ARM: 8798/1: remove unnecessary KBUILD_SRC ifeq conditional
        ARM: 8788/1: ftrace: remove old mcount support
        ARM: 8786/1: Debug kernel copy by printing
      07171da2
    • Linus Torvalds's avatar
      Merge branch 'x86-vdso-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 034bda1c
      Linus Torvalds authored
      Pull x86 vdso updates from Ingo Molnar:
       "Two main changes:
      
         - Cleanups, simplifications and CLOCK_TAI support (Thomas Gleixner)
      
         - Improve code generation (Andy Lutomirski)"
      
      * 'x86-vdso-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/vdso: Rearrange do_hres() to improve code generation
        x86/vdso: Document vgtod_ts better
        x86/vdso: Remove "memory" clobbers in the vDSO syscall fallbacks
        x66/vdso: Add CLOCK_TAI support
        x86/vdso: Move cycle_last handling into the caller
        x86/vdso: Simplify the invalid vclock case
        x86/vdso: Replace the clockid switch case
        x86/vdso: Collapse coarse functions
        x86/vdso: Collapse high resolution functions
        x86/vdso: Introduce and use vgtod_ts
        x86/vdso: Use unsigned int consistently for vsyscall_gtod_data:: Seq
        x86/vdso: Enforce 64bit clocksource
        x86/time: Implement clocksource_arch_init()
        clocksource: Provide clocksource_arch_init()
      034bda1c
    • Rahul Verma's avatar
      qed: Fix static checker warning · 68203a67
      Rahul Verma authored
      	Static Checker Warnings:
      	drivers/net/ethernet/qlogic/qed/qed_main.c:1510 qed_fill_link_capability()
      	error: uninitialized symbol 'tcvr_state'.
      	drivers/net/ethernet/qlogic/qed/qed_mcp.c:1951 qed_mcp_trans_speed_mask()
      	error: uninitialized symbol 'transceiver_state'.
      	drivers/net/ethernet/qlogic/qed/qed_mcp.c:1951 qed_mcp_trans_speed_mask()
      	error: uninitialized symbol 'transceiver_type'.
      
      	Symbols tcvr_state, transceiver_state and transceiver_type
      	are initialized with respective default state.
      
      Fixes: c56a8be7 ("qed: Add supported link and advertise link to display in ethtool.")
      Reported-by: default avatarDan Carpenter <dan.carpenter@oracle.com>
      Signed-off-by: default avatarRahul Verma <Rahul.Verma@cavium.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      68203a67
    • Ivan Vecera's avatar
      Revert "be2net: remove desc field from be_eq_obj" · 5ef79151
      Ivan Vecera authored
      The mentioned commit needs to be reverted because we cannot pass
      string allocated on stack to request_irq(). This function stores
      uses this pointer for later use (e.g. /proc/interrupts) so we need
      to keep this string persistently.
      
      Fixes: d6d9704a ("be2net: remove desc field from be_eq_obj")
      Signed-off-by: default avatarIvan Vecera <ivecera@redhat.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      5ef79151
    • Karsten Graul's avatar
      Revert "net: simplify sock_poll_wait" · 89ab066d
      Karsten Graul authored
      This reverts commit dd979b4d.
      
      This broke tcp_poll for SMC fallback: An AF_SMC socket establishes an
      internal TCP socket for the initial handshake with the remote peer.
      Whenever the SMC connection can not be established this TCP socket is
      used as a fallback. All socket operations on the SMC socket are then
      forwarded to the TCP socket. In case of poll, the file->private_data
      pointer references the SMC socket because the TCP socket has no file
      assigned. This causes tcp_poll to wait on the wrong socket.
      Signed-off-by: default avatarKarsten Graul <kgraul@linux.ibm.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      89ab066d
    • David S. Miller's avatar
      Merge branch 'netsec-fixes' · 6b7a02f7
      David S. Miller authored
      Masahisa Kojima says:
      
      ====================
      Bugfix for the netsec driver
      
      This patch series include bugfix for the netsec ethernet
      controller driver, fix the problem in interface down/up.
      
      changes in v2:
       - change the place to perform the PHY power down
       - use the MACROs defiend in include/uapi/linux/mii.h
       - update commit comment
      ====================
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      6b7a02f7
    • Masahisa Kojima's avatar
      net: socionext: Reset tx queue in ndo_stop · 8d5b0bf6
      Masahisa Kojima authored
      We observed that packets and bytes count are not reset
      when user performs interface down. Eventually, tx queue is
      exhausted and packets will not be sent out.
      To avoid this problem, resets tx queue in ndo_stop.
      
      Fixes: 533dd11a ("net: socionext: Add Synquacer NetSec driver")
      Signed-off-by: default avatarMasahisa Kojima <masahisa.kojima@linaro.org>
      Signed-off-by: default avatarYoshitoyo Osaki <osaki.yoshitoyo@socionext.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      8d5b0bf6
    • Masahisa Kojima's avatar
      net: socionext: Add dummy PHY register read in phy_write() · a3241a91
      Masahisa Kojima authored
      There is a compatibility issue between RTL8211E implemented
      in Developerbox and netsec ethernet controller IP.
      
      Our MDIO controller stops MDC clock right after the write
      access, but RTL8211E expects MDC clock must be kept toggling
      for several clock cycle with MDIO high before entering
      the IDLE state. Without keeping clock after write access,
      write access is not correctly handled and register is not
      updated.
      
      To meet this requirement, netsec driver needs to issue dummy
      read(e.g. read PHYID1(offset 0x2) register) right after write
      access, to keep MDC clock.
      
      We think this compatibility issue is a problem specific to
      our MDIO controller and RTL8211E.
      
      Fixes: 533dd11a ("net: socionext: Add Synquacer NetSec driver")
      Signed-off-by: default avatarMasahisa Kojima <masahisa.kojima@linaro.org>
      Signed-off-by: default avatarYoshitoyo Osaki <osaki.yoshitoyo@socionext.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      a3241a91
    • Masahisa Kojima's avatar
      net: socionext: Stop PHY before resetting netsec · 8e850f25
      Masahisa Kojima authored
      In ndo_stop, driver resets the netsec ethernet controller IP.
      When the netsec IP is reset, HW running mode turns to NRM mode
      and driver has to wait until this mode transition completes.
      
      But mode transition to NRM will not complete if the PHY is
      in normal operation state. Netsec IP requires PHY is in
      power down state when it is reset.
      
      This modification stops the PHY before resetting netsec.
      
      Together with this modification, phy_addr is stored in netsec_priv
      structure because ndev->phydev is not yet ready in ndo_init.
      
      Fixes: 533dd11a ("net: socionext: Add Synquacer NetSec driver")
      Signed-off-by: default avatarMasahisa Kojima <masahisa.kojima@linaro.org>
      Signed-off-by: default avatarYoshitoyo Osaki <osaki.yoshitoyo@socionext.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      8e850f25
    • Linus Torvalds's avatar
      Merge branch 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · d82924c3
      Linus Torvalds authored
      Pull x86 pti updates from Ingo Molnar:
       "The main changes:
      
         - Make the IBPB barrier more strict and add STIBP support (Jiri
           Kosina)
      
         - Micro-optimize and clean up the entry code (Andy Lutomirski)
      
         - ... plus misc other fixes"
      
      * 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/speculation: Propagate information about RSB filling mitigation to sysfs
        x86/speculation: Enable cross-hyperthread spectre v2 STIBP mitigation
        x86/speculation: Apply IBPB more strictly to avoid cross-process data leak
        x86/speculation: Add RETPOLINE_AMD support to the inline asm CALL_NOSPEC variant
        x86/CPU: Fix unused variable warning when !CONFIG_IA32_EMULATION
        x86/pti/64: Remove the SYSCALL64 entry trampoline
        x86/entry/64: Use the TSS sp2 slot for SYSCALL/SYSRET scratch space
        x86/entry/64: Document idtentry
      d82924c3
    • Linus Torvalds's avatar
      Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · d7197a5a
      Linus Torvalds authored
      Pull x86 platform updates from Ingo Molnar:
       "Two minor OLPC changes: a build fix and a new quirk"
      
      * 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/olpc: Fix build error with CONFIG_MFD_CS5535=m
        x86/olpc: Indicate that legacy PC XO-1 platform should not register RTC
      d7197a5a
    • Linus Torvalds's avatar
      Merge branch 'x86-paravirt-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · f682a792
      Linus Torvalds authored
      Pull x86 paravirt updates from Ingo Molnar:
       "Two main changes:
      
         - Remove no longer used parts of the paravirt infrastructure and put
           large quantities of paravirt ops under a new config option
           PARAVIRT_XXL=y, which is selected by XEN_PV only. (Joergen Gross)
      
         - Enable PV spinlocks on Hyperv (Yi Sun)"
      
      * 'x86-paravirt-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/hyperv: Enable PV qspinlock for Hyper-V
        x86/hyperv: Add GUEST_IDLE_MSR support
        x86/paravirt: Clean up native_patch()
        x86/paravirt: Prevent redefinition of SAVE_FLAGS macro
        x86/xen: Make xen_reservation_lock static
        x86/paravirt: Remove unneeded mmu related paravirt ops bits
        x86/paravirt: Move the Xen-only pv_mmu_ops under the PARAVIRT_XXL umbrella
        x86/paravirt: Move the pv_irq_ops under the PARAVIRT_XXL umbrella
        x86/paravirt: Move the Xen-only pv_cpu_ops under the PARAVIRT_XXL umbrella
        x86/paravirt: Move items in pv_info under PARAVIRT_XXL umbrella
        x86/paravirt: Introduce new config option PARAVIRT_XXL
        x86/paravirt: Remove unused paravirt bits
        x86/paravirt: Use a single ops structure
        x86/paravirt: Remove clobbers from struct paravirt_patch_site
        x86/paravirt: Remove clobbers parameter from paravirt patch functions
        x86/paravirt: Make paravirt_patch_call() and paravirt_patch_jmp() static
        x86/xen: Add SPDX identifier in arch/x86/xen files
        x86/xen: Link platform-pci-unplug.o only if CONFIG_XEN_PVHVM
        x86/xen: Move pv specific parts of arch/x86/xen/mmu.c to mmu_pv.c
        x86/xen: Move pv irq related functions under CONFIG_XEN_PV umbrella
      f682a792
    • Linus Torvalds's avatar
      Merge branch 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 99792e0c
      Linus Torvalds authored
      Pull x86 mm updates from Ingo Molnar:
       "Lots of changes in this cycle:
      
         - Lots of CPA (change page attribute) optimizations and related
           cleanups (Thomas Gleixner, Peter Zijstra)
      
         - Make lazy TLB mode even lazier (Rik van Riel)
      
         - Fault handler cleanups and improvements (Dave Hansen)
      
         - kdump, vmcore: Enable kdumping encrypted memory with AMD SME
           enabled (Lianbo Jiang)
      
         - Clean up VM layout documentation (Baoquan He, Ingo Molnar)
      
         - ... plus misc other fixes and enhancements"
      
      * 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (51 commits)
        x86/stackprotector: Remove the call to boot_init_stack_canary() from cpu_startup_entry()
        x86/mm: Kill stray kernel fault handling comment
        x86/mm: Do not warn about PCI BIOS W+X mappings
        resource: Clean it up a bit
        resource: Fix find_next_iomem_res() iteration issue
        resource: Include resource end in walk_*() interfaces
        x86/kexec: Correct KEXEC_BACKUP_SRC_END off-by-one error
        x86/mm: Remove spurious fault pkey check
        x86/mm/vsyscall: Consider vsyscall page part of user address space
        x86/mm: Add vsyscall address helper
        x86/mm: Fix exception table comments
        x86/mm: Add clarifying comments for user addr space
        x86/mm: Break out user address space handling
        x86/mm: Break out kernel address space handling
        x86/mm: Clarify hardware vs. software "error_code"
        x86/mm/tlb: Make lazy TLB mode lazier
        x86/mm/tlb: Add freed_tables element to flush_tlb_info
        x86/mm/tlb: Add freed_tables argument to flush_tlb_mm_range
        smp,cpumask: introduce on_each_cpu_cond_mask
        smp: use __cpumask_set_cpu in on_each_cpu_cond
        ...
      99792e0c
    • Linus Torvalds's avatar
      Merge branch 'x86-hyperv-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 382d72a9
      Linus Torvalds authored
      Pull x86 hyperv updates from Ingo Molnar:
       "Two small changes: a boot warning removal and a minor cleanup"
      
      * 'x86-hyperv-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/hyperv: Remove unused include
        x86/hyperv: Suppress "PCI: Fatal: No config space access function found"
      382d72a9
    • Linus Torvalds's avatar
      Merge branch 'x86-grub2-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · ac73e08e
      Linus Torvalds authored
      Pull x86 grub2 updates from Ingo Molnar:
       "This extends the x86 boot protocol to include an address for the RSDP
        table - utilized by Xen currently.
      
        Matching Grub2 patches are pending as well. (Juergen Gross)"
      
      * 'x86-grub2-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/acpi, x86/boot: Take RSDP address for boot params if available
        x86/boot: Add ACPI RSDP address to setup_header
        x86/xen: Fix boot loader version reported for PVH guests
      ac73e08e
    • Linus Torvalds's avatar
      Merge branch 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · fec98069
      Linus Torvalds authored
      Pull x86 cpu updates from Ingo Molnar:
       "The main changes in this cycle were:
      
         - Add support for the "Dhyana" x86 CPUs by Hygon: these are licensed
           based on the AMD Zen architecture, and are built and sold in China,
           for domestic datacenter use. The code is pretty close to AMD
           support, mostly with a few quirks and enumeration differences. (Pu
           Wen)
      
         - Enable CPUID support on Cyrix 6x86/6x86L processors"
      
      * 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        tools/cpupower: Add Hygon Dhyana support
        cpufreq: Add Hygon Dhyana support
        ACPI: Add Hygon Dhyana support
        x86/xen: Add Hygon Dhyana support to Xen
        x86/kvm: Add Hygon Dhyana support to KVM
        x86/mce: Add Hygon Dhyana support to the MCA infrastructure
        x86/bugs: Add Hygon Dhyana to the respective mitigation machinery
        x86/apic: Add Hygon Dhyana support
        x86/pci, x86/amd_nb: Add Hygon Dhyana support to PCI and northbridge
        x86/amd_nb: Check vendor in AMD-only functions
        x86/alternative: Init ideal_nops for Hygon Dhyana
        x86/events: Add Hygon Dhyana support to PMU infrastructure
        x86/smpboot: Do not use BSP INIT delay and MWAIT to idle on Dhyana
        x86/cpu/mtrr: Support TOP_MEM2 and get MTRR number
        x86/cpu: Get cache info and setup cache cpumap for Hygon Dhyana
        x86/cpu: Create Hygon Dhyana architecture support file
        x86/CPU: Change query logic so CPUID is enabled before testing
        x86/CPU: Use correct macros for Cyrix calls
      fec98069
    • Linus Torvalds's avatar
      Merge branch 'x86-build-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 04ce7fae
      Linus Torvalds authored
      Pull x86 build update from Ingo Molnar:
       "A small cleanup to x86 Kconfigs"
      
      * 'x86-build-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/kconfig: Remove redundant 'default n' lines from all x86 Kconfig's
      04ce7fae
    • Linus Torvalds's avatar
      Merge branch 'x86-boot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 642116d4
      Linus Torvalds authored
      Pull x86 boot updates from Ingo Molnar:
       "Two cleanups and a bugfix for a rare boot option combination"
      
      * 'x86-boot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/boot/KASLR: Remove return value from handle_mem_options()
        x86/corruption-check: Use pr_*() instead of printk()
        x86/corruption-check: Fix panic in memory_corruption_check() when boot option without value is provided
      642116d4
    • Linus Torvalds's avatar
      Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · e1d20bea
      Linus Torvalds authored
      Pull x86 asm updates from Ingo Molnar:
       "The main changes in this cycle were the fsgsbase related preparatory
        patches from Chang S. Bae - but there's also an optimized
        memcpy_flushcache() and a cleanup for the __cmpxchg_double() assembly
        glue"
      
      * 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/fsgsbase/64: Clean up various details
        x86/segments: Introduce the 'CPUNODE' naming to better document the segment limit CPU/node NR trick
        x86/vdso: Initialize the CPU/node NR segment descriptor earlier
        x86/vdso: Introduce helper functions for CPU and node number
        x86/segments/64: Rename the GDT PER_CPU entry to CPU_NUMBER
        x86/fsgsbase/64: Factor out FS/GS segment loading from __switch_to()
        x86/fsgsbase/64: Convert the ELF core dump code to the new FSGSBASE helpers
        x86/fsgsbase/64: Make ptrace use the new FS/GS base helpers
        x86/fsgsbase/64: Introduce FS/GS base helper functions
        x86/fsgsbase/64: Fix ptrace() to read the FS/GS base accurately
        x86/asm: Use CC_SET()/CC_OUT() in __cmpxchg_double()
        x86/asm: Optimize memcpy_flushcache()
      e1d20bea