platform/kernel/linux-rpi.git
5 years agoMerge branch 'mlxsw-Misc-updates'
David S. Miller [Mon, 28 Jan 2019 18:43:15 +0000 (10:43 -0800)]
Merge branch 'mlxsw-Misc-updates'

Ido Schimmel says:

====================
mlxsw: Misc updates

This patchset contains miscellaneous patches we gathered in our queue.
Some of them are dependencies of larger patchsets that I will submit
later this cycle.

Patches #1-#3 perform small non-functional changes in mlxsw.

Patch #4 adds more extended ack messages in mlxsw.

Patch #5 adds devlink parameters documentation for mlxsw. To be extended
with more parameters this cycle.

Patches #6-#7 perform small changes in forwarding selftests
infrastructure.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoselftests: forwarding: Use OK instead of PASS in test output
Ido Schimmel [Mon, 28 Jan 2019 12:02:13 +0000 (12:02 +0000)]
selftests: forwarding: Use OK instead of PASS in test output

It is easier to distinguish "[ OK ]" from "[FAIL]" than "[PASS]".

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Suggested-by: David Ahern <dsahern@gmail.com>
Cc: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoselftests: net: forwarding: change devlink resource support checking
Jiri Pirko [Mon, 28 Jan 2019 12:02:12 +0000 (12:02 +0000)]
selftests: net: forwarding: change devlink resource support checking

As for the others, check help message output to find out if devlink
supports "resource" object.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoDocumentation: add devlink param file for mlxsw driver
Jiri Pirko [Mon, 28 Jan 2019 12:02:11 +0000 (12:02 +0000)]
Documentation: add devlink param file for mlxsw driver

Add initial documentation file for devlink params of mlxsw driver. Only
"fw_load_policy" is now supported.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agomlxsw: spectrum_switchdev: Add more extack messages
Ido Schimmel [Mon, 28 Jan 2019 12:02:10 +0000 (12:02 +0000)]
mlxsw: spectrum_switchdev: Add more extack messages

Add more extack messages that let the user know why VXLAN offload
failed.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Suggested-by: David Ahern <dsahern@gmail.com>
Cc: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agomlxsw: spectrum_acl: Fix rul/rule typo
Jiri Pirko [Mon, 28 Jan 2019 12:02:09 +0000 (12:02 +0000)]
mlxsw: spectrum_acl: Fix rul/rule typo

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agomlxsw: spectrum_acl: Move mr_ruleset and mr_rule structs
Jiri Pirko [Mon, 28 Jan 2019 12:02:08 +0000 (12:02 +0000)]
mlxsw: spectrum_acl: Move mr_ruleset and mr_rule structs

Move the struct to the place where they belong, alongside with the rest
of the MR code.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agomlxsw: spectrum_acl: Remove unnecessary arg on action_replace call path
Jiri Pirko [Mon, 28 Jan 2019 12:02:07 +0000 (12:02 +0000)]
mlxsw: spectrum_acl: Remove unnecessary arg on action_replace call path

No need to pass ruleset/group and chunk pointers on action_replace call
path, nobody uses them.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoMerge branch 'tcp-change-pingpong-to-3-in-delayed-ack-logic'
David S. Miller [Sun, 27 Jan 2019 21:29:43 +0000 (13:29 -0800)]
Merge branch 'tcp-change-pingpong-to-3-in-delayed-ack-logic'

Wei Wang says:

====================
tcp: change pingpong to 3 in delayed ack logic

TCP receiver today tries not to delay the ACKs to speed up the initial
slow start (a.k.a QUICK ACK mechanism). However the previous design
does not work well with modern TCP applications that starts with an
application-level handshake. For example, a HTTPs server often
receives the SSL hello and responds right away which triggers the TCP
stack to stop the quick ack and start delaying the ACKs based only one
instance of ping-pong. This patchset changes the threshold from 1 to 3
ping-pong transactions, so that we only start to delay the acks after
the receiver responds data quickly three times.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agotcp: change pingpong threshold to 3
Wei Wang [Fri, 25 Jan 2019 18:53:20 +0000 (10:53 -0800)]
tcp: change pingpong threshold to 3

In order to be more confident about an on-going interactive session, we
increment pingpong count by 1 for every interactive transaction and we
adjust TCP_PINGPONG_THRESH to 3.
This means, we only consider a session in pingpong mode after we see 3
interactive transactions, and start to activate delayed acks in quick
ack mode.
And in order to not over-count the credits, we only increase pingpong
count for the first packet sent in response for the previous received
packet.
This is mainly to prevent delaying the ack immediately after some
handshake protocol but no real interactive traffic pattern afterwards.

Signed-off-by: Wei Wang <weiwan@google.com>
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agotcp: Refactor pingpong code
Wei Wang [Fri, 25 Jan 2019 18:53:19 +0000 (10:53 -0800)]
tcp: Refactor pingpong code

Instead of using pingpong as a single bit information, we refactor the
code to treat it as a counter. When interactive session is detected,
we set pingpong count to TCP_PINGPONG_THRESH. And when pingpong count
is >= TCP_PINGPONG_THRESH, we consider the session in pingpong mode.

This patch is a pure refactor and sets foundation for the next patch.
This patch itself does not change any pingpong logic.

Signed-off-by: Wei Wang <weiwan@google.com>
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: ipv4: ip_input: fix blank line coding style issues
Yang Wei [Fri, 25 Jan 2019 14:41:50 +0000 (22:41 +0800)]
net: ipv4: ip_input: fix blank line coding style issues

Fix blank line coding style issues, make the code cleaner.
Remove a redundant blank line in ip_rcv_core().
Insert a blank line in ip_rcv() between different statement blocks.

Signed-off-by: Yang Wei <yang.wei9@zte.com.cn>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: phy: at803x: Use helpers to access MMD PHY registers
Carlo Caione [Fri, 25 Jan 2019 12:35:10 +0000 (12:35 +0000)]
net: phy: at803x: Use helpers to access MMD PHY registers

Libphy provides a standard set of helpers to access the MMD PHY
registers. Use those instead of relying on custom driver-specific
functions.

Signed-off-by: Carlo Caione <ccaione@baylibre.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
David S. Miller [Sun, 27 Jan 2019 18:43:17 +0000 (10:43 -0800)]
Merge git://git./linux/kernel/git/davem/net

5 years agoMerge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Linus Torvalds [Sun, 27 Jan 2019 17:21:00 +0000 (09:21 -0800)]
Merge tag 'for-linus' of git://git./virt/kvm/kvm

Pull KVM fixes from Paolo Bonzini:
 "Quite a few fixes for x86: nested virtualization save/restore, AMD
  nested virtualization and virtual APIC, 32-bit fixes, an important fix
  to restore operation on older processors, and a bunch of hyper-v
  bugfixes. Several are marked stable.

  There are also fixes for GCC warnings and for a GCC/objtool interaction"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: x86: Mark expected switch fall-throughs
  KVM: x86: fix TRACE_INCLUDE_PATH and remove -I. header search paths
  KVM: selftests: check returned evmcs version range
  x86/kvm/hyper-v: nested_enable_evmcs() sets vmcs_version incorrectly
  KVM: VMX: Move vmx_vcpu_run()'s VM-Enter asm blob to a helper function
  kvm: selftests: Fix region overlap check in kvm_util
  kvm: vmx: fix some -Wmissing-prototypes warnings
  KVM: nSVM: clear events pending from svm_complete_interrupts() when exiting to L1
  svm: Fix AVIC incomplete IPI emulation
  svm: Add warning message for AVIC IPI invalid target
  KVM: x86: WARN_ONCE if sending a PV IPI returns a fatal error
  KVM: x86: Fix PV IPIs for 32-bit KVM host
  x86/kvm/hyper-v: recommend using eVMCS only when it is enabled
  x86/kvm/hyper-v: don't recommend doing reset via synthetic MSR
  kvm: x86/vmx: Use kzalloc for cached_vmcs12
  KVM: VMX: Use the correct field var when clearing VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL
  KVM: x86: Fix single-step debugging
  x86/kvm/hyper-v: don't announce GUEST IDLE MSR support

5 years agoMerge tag 'dma-mapping-5.0-2' of git://git.infradead.org/users/hch/dma-mapping
Linus Torvalds [Sun, 27 Jan 2019 17:18:05 +0000 (09:18 -0800)]
Merge tag 'dma-mapping-5.0-2' of git://git.infradead.org/users/hch/dma-mapping

Pull dma-mapping fix from Christoph Hellwig:
 "Fix a xen-swiotlb regression on arm64"

* tag 'dma-mapping-5.0-2' of git://git.infradead.org/users/hch/dma-mapping:
  arm64/xen: fix xen-swiotlb cache flushing

5 years agoMerge tag 'libnvdimm-fixes-5.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 27 Jan 2019 17:11:51 +0000 (09:11 -0800)]
Merge tag 'libnvdimm-fixes-5.0-rc4' of git://git./linux/kernel/git/nvdimm/nvdimm

Pull libnvdimm fixes from Dan Williams:
 "A fix for namespace label support for non-Intel NVDIMMs that implement
  the ACPI standard label method.

  This has apparently never worked and could wait for v5.1. However it
  has enough visibility with hardware vendors [1] and distro bug
  trackers [2], and low enough risk that I decided it should go in for
  -rc4. The other fixups target the new, for v5.0, nvdimm security
  functionality. The larger init path fixup closes a memory leak and a
  potential userspace lockup due to missed notifications.

    [1] https://github.com/pmem/ndctl/issues/78
    [2] https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1811785

  These have all soaked in -next for a week with no reported issues.

  Summary:

   - Fix support for NVDIMMs that implement the ACPI standard label
     methods.

   - Fix error handling for security overwrite (memory leak / userspace
     hang condition), and another one-line security cleanup"

* tag 'libnvdimm-fixes-5.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
  acpi/nfit: Fix command-supported detection
  acpi/nfit: Block function zero DSMs
  libnvdimm/security: Require nvdimm_security_setup_events() to succeed
  nfit_test: fix security state pull for nvdimm security nfit_test

5 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Linus Torvalds [Sun, 27 Jan 2019 17:07:03 +0000 (09:07 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/dtor/input

Pull input fixes from Dmitry Torokhov:
 "A fixup for the input_event fix for y2038 Sparc64, and couple other
  minor fixes"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: input_event - fix the CONFIG_SPARC64 mixup
  Input: olpc_apsp - assign priv->dev earlier
  Input: uinput - fix undefined behavior in uinput_validate_absinfo()
  Input: raspberrypi-ts - fix link error
  Input: xpad - add support for SteelSeries Stratus Duo
  Input: input_event - provide override for sparc64

5 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Linus Torvalds [Sun, 27 Jan 2019 16:59:12 +0000 (08:59 -0800)]
Merge git://git./linux/kernel/git/davem/net

Pull networking fixes from David Miller:

 1) Count ttl-dropped frames properly in mac80211, from Bob Copeland.

 2) Integer overflow in ktime handling of bcm can code, from Oliver
    Hartkopp.

 3) Fix RX desc handling wrt. hw checksumming in ravb, from Simon
    Horman.

 4) Various hash key fixes in hv_netvsc, from Haiyang Zhang.

 5) Use after free in ax25, from Eric Dumazet.

 6) Several fixes to the SSN support in SCTP, from Xin Long.

 7) Do not process frames after a NAPI reschedule in ibmveth, from
    Thomas Falcon.

 8) Fix NLA_POLICY_NESTED arguments, from Johannes Berg.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (42 commits)
  qed: Revert error handling changes.
  cfg80211: extend range deviation for DMG
  cfg80211: reg: remove warn_on for a normal case
  mac80211: Add attribute aligned(2) to struct 'action'
  mac80211: don't initiate TDLS connection if station is not associated to AP
  nl80211: fix NLA_POLICY_NESTED() arguments
  ibmveth: Do not process frames after calling napi_reschedule
  net: dev_is_mac_header_xmit() true for ARPHRD_RAWIP
  net: usb: asix: ax88772_bind return error when hw_reset fail
  MAINTAINERS: Update cavium networking drivers
  net/mlx4_core: Fix error handling when initializing CQ bufs in the driver
  net/mlx4_core: Add masking for a few queries on HCA caps
  sctp: set flow sport from saddr only when it's 0
  sctp: set chunk transport correctly when it's a new asoc
  sctp: improve the events for sctp stream adding
  sctp: improve the events for sctp stream reset
  ip_tunnel: Make none-tunnel-dst tunnel port work with lwtunnel
  ax25: fix possible use-after-free
  sfc: suppress duplicate nvmem partition types in efx_ef10_mtd_probe
  hv_netvsc: fix typos in code comments
  ...

5 years agonet: lmc: remove -I. header search path
Masahiro Yamada [Fri, 25 Jan 2019 14:22:29 +0000 (23:22 +0900)]
net: lmc: remove -I. header search path

The header search path -I. in kernel Makefiles is very suspicious;
it allows the compiler to search for headers in the top of $(srctree),
where obviously no header file exists.

I was able to build without this header search path.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoMerge tag '5.0-rc3-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6
Linus Torvalds [Sat, 26 Jan 2019 23:38:22 +0000 (15:38 -0800)]
Merge tag '5.0-rc3-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6

Pull smb3 fixes from Steve French:
 "A set of small smb3 fixes, some fixing various crediting issues
  discovered during xfstest runs, five for stable"

* tag '5.0-rc3-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6:
  cifs: print CIFSMaxBufSize as part of /proc/fs/cifs/DebugData
  smb3: add credits we receive from oplock/break PDUs
  CIFS: Fix mounts if the client is low on credits
  CIFS: Do not assume one credit for async responses
  CIFS: Fix credit calculations in compound mid callback
  CIFS: Fix credit calculation for encrypted reads with errors
  CIFS: Fix credits calculations for reads with errors
  CIFS: Do not reconnect TCP session in add_credits()
  smb3: Cleanup license mess
  CIFS: Fix possible hang during async MTU reads and writes
  cifs: fix memory leak of an allocated cifs_ntsd structure

5 years agoMerge tag 'vfio-v5.0-rc4' of git://github.com/awilliam/linux-vfio
Linus Torvalds [Sat, 26 Jan 2019 23:27:04 +0000 (15:27 -0800)]
Merge tag 'vfio-v5.0-rc4' of git://github.com/awilliam/linux-vfio

Pull VFIO fixes from Alex Williamson:

 - cleanup licenses in new files (Thomas Gleixner)

 - cleanup new compiler warnings (Alexey Kardashevskiy)

* tag 'vfio-v5.0-rc4' of git://github.com/awilliam/linux-vfio:
  vfio-pci/nvlink2: Fix ancient gcc warnings
  vfio/pci: Cleanup license mess

5 years agoatheros: atl2: replace dev_kfree_skb_any() by dev_consume_skb_any()
Yang Wei [Thu, 24 Jan 2019 14:45:38 +0000 (22:45 +0800)]
atheros: atl2: replace dev_kfree_skb_any() by dev_consume_skb_any()

atl2_xmit_frame() should call dev_consume_skb_any() when the
transmission is successful. It makes drop profiles more friendly.

Signed-off-by: Yang Wei <yang.wei9@zte.com.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoMerge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Linus Torvalds [Sat, 26 Jan 2019 23:03:43 +0000 (15:03 -0800)]
Merge tag 'scsi-fixes' of git://git./linux/kernel/git/jejb/scsi

Pull SCSI fixes from James Bottomley:
 "Six fixes, all of which appear to have user visible consequences.

  The DMA one is a regression fix from the merge window and of the
  others, four are driver specific and one specific to the target code"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: ufs: Use explicit access size in ufshcd_dump_regs
  scsi: tcmu: fix use after free
  scsi: csiostor: fix NULL pointer dereference in csio_vport_set_state()
  scsi: lpfc: nvmet: avoid hang / use-after-free when destroying targetport
  scsi: lpfc: nvme: avoid hang / use-after-free when destroying localport
  scsi: communicate max segment size to the DMA mapping code

5 years agoMerge tag 'for-linus-20190125' of git://git.kernel.dk/linux-block
Linus Torvalds [Sat, 26 Jan 2019 20:42:41 +0000 (12:42 -0800)]
Merge tag 'for-linus-20190125' of git://git.kernel.dk/linux-block

Pull block fixes from Jens Axboe:
 "A collection of fixes for this release. This contains:

   - Silence sparse rightfully complaining about non-static wbt
     functions (Bart)

   - Fixes for the zoned comments/ioctl documentation (Damien)

   - direct-io fix that's been lingering for a while (Ernesto)

   - cgroup writeback fix (Tejun)

   - Set of NVMe patches for nvme-rdma/tcp (Sagi, Hannes, Raju)

   - Block recursion tracking fix (Ming)

   - Fix debugfs command flag naming for a few flags (Jianchao)"

* tag 'for-linus-20190125' of git://git.kernel.dk/linux-block:
  block: Fix comment typo
  uapi: fix ioctl documentation
  blk-wbt: Declare local functions static
  blk-mq: fix the cmd_flag_name array
  nvme-multipath: drop optimization for static ANA group IDs
  nvmet-rdma: fix null dereference under heavy load
  nvme-rdma: rework queue maps handling
  nvme-tcp: fix timeout handler
  nvme-rdma: fix timeout handler
  writeback: synchronize sync(2) against cgroup writeback membership switches
  block: cover another queue enter recursion via BIO_QUEUE_ENTERED
  direct-io: allow direct writes to empty inodes

5 years agoMerge branch 'ip_tunnel-next'
David S. Miller [Sat, 26 Jan 2019 17:43:03 +0000 (09:43 -0800)]
Merge branch 'ip_tunnel-next'

wenxu says:

====================
ip_tunnel: Refactor ip_gre collect metadata xmit to ip_md_tunnel_xmit

This patchset add tunnel_dst_cache and tnl_update_pmtu feature for
ip_md_tunnel_xmit also bugfix. Then Refactor collect metatdata mode
tunnel xmit to ip_md_tunnel_xmit
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoip_gre: Refactor collect metatdata mode tunnel xmit to ip_md_tunnel_xmit
wenxu [Tue, 22 Jan 2019 10:39:52 +0000 (18:39 +0800)]
ip_gre: Refactor collect metatdata mode tunnel xmit to ip_md_tunnel_xmit

Refactor collect metatdata mode tunnel xmit to the generic xmit function
ip_md_tunnel_xmit. It makes codes more generic and support more feture
such as pmtu_update through ip_md_tunnel_xmit

Signed-off-by: wenxu <wenxu@ucloud.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoip_tunnel: Fix route fl4 init in ip_md_tunnel_xmit
wenxu [Tue, 22 Jan 2019 10:39:51 +0000 (18:39 +0800)]
ip_tunnel: Fix route fl4 init in ip_md_tunnel_xmit

Init the gre_key from tuninfo->key.tun_id and init the mark
from the skb->mark, set the oif to zero in the collect metadata
mode.

Fixes: cfc7381b3002 ("ip_tunnel: add collect_md mode to IPIP tunnel")
Signed-off-by: wenxu <wenxu@ucloud.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoip_tunnel: Add tnl_update_pmtu in ip_md_tunnel_xmit
wenxu [Tue, 22 Jan 2019 10:39:50 +0000 (18:39 +0800)]
ip_tunnel: Add tnl_update_pmtu in ip_md_tunnel_xmit

Add tnl_update_pmtu in ip_md_tunnel_xmit to dynamic modify
the pmtu which packet send through collect_metadata mode
ip tunnel

Signed-off-by: wenxu <wenxu@ucloud.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoip_tunnel: Add ip tunnel dst_cache in ip_md_tunnel_xmit
wenxu [Tue, 22 Jan 2019 10:39:49 +0000 (18:39 +0800)]
ip_tunnel: Add ip tunnel dst_cache in ip_md_tunnel_xmit

Add ip tunnel dst cache in ip_md_tunnel_xmit to make more
efficient for the route lookup.

Signed-off-by: wenxu <wenxu@ucloud.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agolan743x: Provide Read/Write Access to on chip OTP
Bryan Whitehead [Wed, 23 Jan 2019 20:18:47 +0000 (15:18 -0500)]
lan743x: Provide Read/Write Access to on chip OTP

The LAN743x includes on chip One-Time-Programmable (OTP) memory.

This patch extends the ethtool EEPROM read/write interface to
access OTP memory space.

The currently existing interface is limited, as it does not
allow OTP read, and OTP writes are restricted to
offset==0, length==512, and data[0]==0xF3.

This patch removes these restrictions and adds a private flag
called OTP_ACCESS, which is used to switch between EEPROM, and
OTP modes.

The private flag OTP_ACCESS is configurable through the
  ethtool --set-priv-flags command.
And visible through the
  ethtool --show-priv-flags command.

By default OTP_ACCESS is false, and there for previously existing
EEPROM commands will work exactly the same. However now access to
OTP requires one extra step of setting OTP_ACCESS to true. This
flag controls the read, write, and length reporting, functions
of ethtool.

EEPROM presence is not checked when setting or clearing this flag.
If the EEPROM is not present, the user, as before, will need to
diagnose that using existing read and write function of ethtool,
while OTP_ACCESS is false.

Updates for V2:
Added comments as to why this patch is needed.
Added comments explaining that EEPROM presence is not check
  when setting or clearing the OTP_ACCESS flag.
Added length checking to all otp/eeprom read/write functions.

Signed-off-by: Bryan Whitehead <Bryan.Whitehead@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoMerge branch 'hns3-next'
David S. Miller [Sat, 26 Jan 2019 17:33:31 +0000 (09:33 -0800)]
Merge branch 'hns3-next'

Huazhong Tan says:

====================
code optimizations & bugfixes for HNS3 driver

This patchset includes bugfixes and code optimizations for the HNS3
ethernet controller driver
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: hns3: don't allow vf to enable promisc mode
Jian Shen [Sat, 26 Jan 2019 16:49:21 +0000 (00:49 +0800)]
net: hns3: don't allow vf to enable promisc mode

VF can receive packets of other functions when in promisc
mode. It's not safe, so don't allow VF to enable promisc
mode.

Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: hns3: add initialization for nic state
Jian Shen [Sat, 26 Jan 2019 16:49:20 +0000 (00:49 +0800)]
net: hns3: add initialization for nic state

This patch adds initialization for nic state, sets flag
HNS3_NIC_STATE_DOWN when initialize, clears it before
vectors and napi being enabled in the hns3_nic_net_up(),
and sets it back in the error handler.

Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: hns3: add 8 BD limit for tx flow
Peng Li [Sat, 26 Jan 2019 16:49:19 +0000 (00:49 +0800)]
net: hns3: add 8 BD limit for tx flow

A single transmit packet can span up to 8 descriptors according
to the HW limit. If a skb has more than 8 frags, driver uses
skb_copy to get a new skb which has less frags.

Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: hns3: call hns3_nic_set_real_num_queue with netdev down
Yunsheng Lin [Sat, 26 Jan 2019 16:49:18 +0000 (00:49 +0800)]
net: hns3: call hns3_nic_set_real_num_queue with netdev down

hns3_client_setup_tc in enet is for updating TC configuration to
stack, and hclge_setup_tc in hclge_dcb is mainly for setting the
configuration to hardware.

This patch removes the hns3_nic_set_real_num_queue from
hns3_setup_tc in enet, and call hclge_client_setup_tc to update
TC configuration to stack with netdev down, because the netdev
down operation is done in hclge_dcb now.

Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: hns3: remove dcb_ops->map_update in hclge_dcb
Yunsheng Lin [Sat, 26 Jan 2019 16:49:17 +0000 (00:49 +0800)]
net: hns3: remove dcb_ops->map_update in hclge_dcb

After doing down/uninit/init/up in hclge_dcb, it is not necessary
to call dcb_ops->map_update in enet, so hclge_map_update can be
called directly in hclge_dcb.

This is for preparing to call hns3_nic_set_real_num_queue with
netdev down when user changes mqprio configuration.

Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: hns3: do reinitialization while mqprio configuration changed
Yunsheng Lin [Sat, 26 Jan 2019 16:49:16 +0000 (00:49 +0800)]
net: hns3: do reinitialization while mqprio configuration changed

When user changes the mqprio configuration, enet need to be
uninited and inited besides down'ed and up'ed, because the queue
num may change when the TC num changes.

Also, it is more suitable to do the down/unint/init/up operation
in hclge module using hclge_notify_client, because this config
change may affect PF and its VF.

Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: hns3: After setting the loopback, add the status of getting MAC
liuzhongzhu [Sat, 26 Jan 2019 16:49:15 +0000 (00:49 +0800)]
net: hns3: After setting the loopback, add the status of getting MAC

After setting the serdes loopback, you need to determine
the status of the MAC negotiation. If a status exception
is obtained after 200ms, a timeout error is returned.

Signed-off-by: liuzhongzhu <liuzhongzhu@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: hns3: fix broadcast promisc issue for revision 0x20
Jian Shen [Sat, 26 Jan 2019 16:49:14 +0000 (00:49 +0800)]
net: hns3: fix broadcast promisc issue for revision 0x20

For revision 0x20, vlan filter is always bypassed when enable
broadcast promisc mode. In this case, broadcast packets with
any vlan id can be accpeted. We should disable broadcast promisc
mode until user want enable it.

Fixes: 46a3df9f9718 ("net: hns3: Add HNS3 Acceleration Engine & Compatibility Layer Support")
Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: hns3: fix return value handle issue for hclge_set_loopback()
Jian Shen [Sat, 26 Jan 2019 16:49:13 +0000 (00:49 +0800)]
net: hns3: fix return value handle issue for hclge_set_loopback()

In current code, it always return 0, even loopback mode setting failed.
It's incorrect. This patch fixes return value handle for loopback test.

Fixes: 0f29fc23b21d ("net: hns3: Fix for loopback selftest failed problem")
Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: hns3: add error handling in hclge_ieee_setets
Yunsheng Lin [Sat, 26 Jan 2019 16:49:12 +0000 (00:49 +0800)]
net: hns3: add error handling in hclge_ieee_setets

Currently hclge_ieee_setets returns error directly when there is
error, which may cause netdev not up problem.

This patch adds some error handling when setting ETS configuration
fails.

Fixes: cacde272dd00 ("net: hns3: Add hclge_dcb module for the support of DCB feature")
Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: hns3: clear pci private data when unload hns3 driver
Jian Shen [Sat, 26 Jan 2019 16:49:11 +0000 (00:49 +0800)]
net: hns3: clear pci private data when unload hns3 driver

When unload hns3 driver, we should clear the pci private data.

Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: hns3: don't update packet statistics for packets dropped by hardware
Jian Shen [Sat, 26 Jan 2019 16:49:10 +0000 (00:49 +0800)]
net: hns3: don't update packet statistics for packets dropped by hardware

Packet statistics for netdev should not include the packets dropped
by hardware.

Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoMerge branch 'r8169-add-EEE-support-for-RTL8168f'
David S. Miller [Sat, 26 Jan 2019 17:19:39 +0000 (09:19 -0800)]
Merge branch 'r8169-add-EEE-support-for-RTL8168f'

Heiner Kallweit says:

====================
r8169: add EEE support for RTL8168f

This series adds EEE support for RTL8168f. Again first patch adds the
support, and second patch enables EEE per default.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agor8169: enable EEE per default on RTL8168f
Heiner Kallweit [Sat, 26 Jan 2019 09:36:35 +0000 (10:36 +0100)]
r8169: enable EEE per default on RTL8168f

Enable EEE per default on RTL8168f.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agor8169: add EEE support for RTL8168f
Heiner Kallweit [Sat, 26 Jan 2019 09:35:30 +0000 (10:35 +0100)]
r8169: add EEE support for RTL8168f

Add EEE support for RTL8168f to the recently added EEE handling
framework in the driver. This patch leaves the chip defaults, means
EEE typically is disabled initially and it's up to the user to enable
it via ethtool.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoDocumentation: net: phy: switch documentation to rst format
Heiner Kallweit [Sat, 26 Jan 2019 10:25:37 +0000 (11:25 +0100)]
Documentation: net: phy: switch documentation to rst format

Switch phylib documentation to rst format.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agotcp: allow zerocopy with fastopen
Willem de Bruijn [Fri, 25 Jan 2019 16:17:23 +0000 (11:17 -0500)]
tcp: allow zerocopy with fastopen

Accept MSG_ZEROCOPY in all the TCP states that allow sendmsg. Remove
the explicit check for ESTABLISHED and CLOSE_WAIT states.

This requires correctly handling zerocopy state (uarg, sk_zckey) in
all paths reachable from other TCP states. Such as the EPIPE case
in sk_stream_wait_connect, which a sendmsg() in incorrect state will
now hit. Most paths are already safe.

Only extension needed is for TCP Fastopen active open. This can build
an skb with data in tcp_send_syn_data. Pass the uarg along with other
fastopen state, so that this skb also generates a zerocopy
notification on release.

Tested with active and passive tcp fastopen packetdrill scripts at
https://github.com/wdebruij/packetdrill/commit/1747eef03d25a2404e8132817d0f1244fd6f129d

Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoptp: fix debugfs_simple_attr.cocci warnings
YueHaibing [Fri, 25 Jan 2019 02:28:59 +0000 (02:28 +0000)]
ptp: fix debugfs_simple_attr.cocci warnings

Use DEFINE_DEBUGFS_ATTRIBUTE rather than DEFINE_SIMPLE_ATTRIBUTE
for debugfs files.

Semantic patch information:
Rationale: DEFINE_SIMPLE_ATTRIBUTE + debugfs_create_file()
imposes some significant overhead as compared to
DEFINE_DEBUGFS_ATTRIBUTE + debugfs_create_file_unsafe().

Generated by: scripts/coccinelle/api/debugfs/debugfs_simple_attr.cocci

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Acked-by: Yangbo Lu <yangbo.lu@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoMerge branch 'r8169-add-EEE-support-for-RTL8168g+'
David S. Miller [Sat, 26 Jan 2019 06:02:52 +0000 (22:02 -0800)]
Merge branch 'r8169-add-EEE-support-for-RTL8168g+'

Heiner Kallweit says:

====================
r8169: add EEE support for RTL8168g+

This series adds general EEE support to be used with ethtool.
In addition it implements EEE for chip versions from RTL8168g.
The first patch leaves the default chip settings and the
second enables EEE per default. This allows us to revert patch 2
w/o removing EEE support completely if we should face issues with
EEE on particular chip versions.

Unfortunately Realtek decided not to use the standard EEE MMD
registers but to use proprietary registers. Therefore we can't
use phylib functions like phy_ethtool_set_eee and have to
reimplement the functionality.

Tested on a system with RTL8168g (chip version 40).
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agor8169: enable EEE per default on chip versions from RTL8168g
Heiner Kallweit [Fri, 25 Jan 2019 19:39:42 +0000 (20:39 +0100)]
r8169: enable EEE per default on chip versions from RTL8168g

Enable EEE per default on chip versions from RTL8168g.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agor8169: add general EEE support for chip versions from RTL8168g
Heiner Kallweit [Fri, 25 Jan 2019 19:38:38 +0000 (20:38 +0100)]
r8169: add general EEE support for chip versions from RTL8168g

This patch adds the general framework to deal with EEE in this driver
plus EEE support for chip versions from RTL8168g. We don't touch the
default chip settings, therefore EEE will usually be disabled and it's
up to the user to enable it.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoMerge branch 'ipv6-defrag-rbtree'
David S. Miller [Sat, 26 Jan 2019 05:37:11 +0000 (21:37 -0800)]
Merge branch 'ipv6-defrag-rbtree'

Peter Oskolkov says:

====================
net: IP defrag: use rbtrees in IPv6 defragmentation

Currently, IPv6 defragmentation code drops non-last fragments that
are smaller than 1280 bytes: see
commit 0ed4229b08c1 ("ipv6: defrag: drop non-last frags smaller than min mtu")

This behavior is not specified in IPv6 RFCs and appears to break compatibility
with some IPv6 implementations, as reported here:
https://www.spinics.net/lists/netdev/msg543846.html

This patchset contains four patches:
- patch 1 moves rbtree-related code from IPv4 to files shared b/w
IPv4/IPv6
- patch 2 changes IPv6 defragmenation code to use rbtrees for defrag
queue
- patch 3 changes nf_conntrack IPv6 defragmentation code to use rbtrees
- patch 4 changes ip_defrag selftest to test changes made in the
previous three patches.

Along the way, the 1280-byte restrictions are removed.

I plan to introduce similar changes to 6lowpan defragmentation code
once I figure out how to test it.
====================

Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoselftests: net: ip_defrag: cover new IPv6 defrag behavior
Peter Oskolkov [Tue, 22 Jan 2019 18:02:53 +0000 (10:02 -0800)]
selftests: net: ip_defrag: cover new IPv6 defrag behavior

This patch adds several changes to the ip_defrag selftest, to cover
new IPv6 defrag behavior:

- min IPv6 frag size is now 8 instead of 1280

- new test cases to cover IPv6 defragmentation in nf_conntrack_reasm.c

- new "permissive" mode in negative (overlap) tests: netfilter
sometimes drops invalid packets without passing them to IPv6
underneath, and thus defragmentation sometimes succeeds when
it is expected to fail; so the permissive mode does not fail the
test if the correct reassembled datagram is received instead of a
timeout.

Signed-off-by: Peter Oskolkov <posk@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: IP6 defrag: use rbtrees in nf_conntrack_reasm.c
Peter Oskolkov [Tue, 22 Jan 2019 18:02:52 +0000 (10:02 -0800)]
net: IP6 defrag: use rbtrees in nf_conntrack_reasm.c

Currently, IPv6 defragmentation code drops non-last fragments that
are smaller than 1280 bytes: see
commit 0ed4229b08c1 ("ipv6: defrag: drop non-last frags smaller than min mtu")

This behavior is not specified in IPv6 RFCs and appears to break
compatibility with some IPv6 implemenations, as reported here:
https://www.spinics.net/lists/netdev/msg543846.html

This patch re-uses common IP defragmentation queueing and reassembly
code in IP6 defragmentation in nf_conntrack, removing the 1280 byte
restriction.

Signed-off-by: Peter Oskolkov <posk@google.com>
Reported-by: Tom Herbert <tom@herbertland.com>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: IP6 defrag: use rbtrees for IPv6 defrag
Peter Oskolkov [Tue, 22 Jan 2019 18:02:51 +0000 (10:02 -0800)]
net: IP6 defrag: use rbtrees for IPv6 defrag

Currently, IPv6 defragmentation code drops non-last fragments that
are smaller than 1280 bytes: see
commit 0ed4229b08c1 ("ipv6: defrag: drop non-last frags smaller than min mtu")

This behavior is not specified in IPv6 RFCs and appears to break
compatibility with some IPv6 implemenations, as reported here:
https://www.spinics.net/lists/netdev/msg543846.html

This patch re-uses common IP defragmentation queueing and reassembly
code in IPv6, removing the 1280 byte restriction.

Signed-off-by: Peter Oskolkov <posk@google.com>
Reported-by: Tom Herbert <tom@herbertland.com>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: IP defrag: encapsulate rbtree defrag code into callable functions
Peter Oskolkov [Tue, 22 Jan 2019 18:02:50 +0000 (10:02 -0800)]
net: IP defrag: encapsulate rbtree defrag code into callable functions

This is a refactoring patch: without changing runtime behavior,
it moves rbtree-related code from IPv4-specific files/functions
into .h/.c defrag files shared with IPv6 defragmentation code.

Signed-off-by: Peter Oskolkov <posk@google.com>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Florian Westphal <fw@strlen.de>
Cc: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoMerge branch 's390-qeth-next'
David S. Miller [Sat, 26 Jan 2019 05:23:56 +0000 (21:23 -0800)]
Merge branch 's390-qeth-next'

Julian Wiedmann says:

====================
s390/qeth: updates 2019-01-25

please apply a first batch of qeth patches for net-next, primarily touching the
net_device parts of the driver.
In addition to the usual refactoring & code consolidation, patch 7 makes use of
netif_device_detach() to let the stack know when our control plane is down. This
helps quite a bit wrt to overall locking and proper init/shutdown sequencing.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agos390/qeth: remove VLAN tracking for L2 devices
Julian Wiedmann [Fri, 25 Jan 2019 14:44:23 +0000 (15:44 +0100)]
s390/qeth: remove VLAN tracking for L2 devices

For recovery purposes, qeth keeps track of all registered VIDs. Replace
this by using the infrastructure introduced in
commit 9daae9bd47cf ("net: Call add/kill vid ndo on vlan filter feature toggling").

By managing NETIF_F_HW_VLAN_CTAG_FILTER as a hw_feature,
netdev_update_features() will select it from dev->wanted_features
and replay all of the netdevice's VIDs to its ndo_vlan_rx_add_vid()
callback.
z/VM NICs strictly require VLAN registration, so don't expose it as
hw_feature there but add a little hack in qeth_enable_hw_features()
to make things work regardless.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agos390/qeth: detach netdevice while card is offline
Julian Wiedmann [Fri, 25 Jan 2019 14:44:22 +0000 (15:44 +0100)]
s390/qeth: detach netdevice while card is offline

When a qeth card is offline, it has no connection to the HW. So none of
our control callbacks can run IO against it, and we can only cache the
input (eg a new MAC address) without providing proper feedback to the
caller. In this context, it seems much more reasonable to simply detach
the netdevice and let the kernel reject any interaction with it.

This also makes all sorts of internal state checks and locking obsolete.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agos390/qeth: delay netdevice registration
Julian Wiedmann [Fri, 25 Jan 2019 14:44:21 +0000 (15:44 +0100)]
s390/qeth: delay netdevice registration

Re-order the code flow a bit so that all initial HW setup is done before
putting the netdevice into play. For a netdevice that hasn't been
registered before, we also don't need to re-enable its HW features or
check for recovery actions.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agos390/qeth: remove TX disable from online path
Julian Wiedmann [Fri, 25 Jan 2019 14:44:20 +0000 (15:44 +0100)]
s390/qeth: remove TX disable from online path

At best this is redundant, at worst it papers over a race in the
offline / online code.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agos390/qeth: register MAC address earlier
Julian Wiedmann [Fri, 25 Jan 2019 14:44:19 +0000 (15:44 +0100)]
s390/qeth: register MAC address earlier

commit 4789a2188048 ("s390/qeth: fix race when setting MAC address")
resolved a race where our initial programming of dev_addr into the HW
and a call to ndo_set_mac_address() could run concurrently. In this
case, we could end up getting confused about which address was actually
set in the HW.

The quick fix was to introduce additional locking that blocks any
ndo_set_mac_address() while the device is being set online. But the race
primarily originated from the fact that we first register the netdevice,
and only then program its dev_addr. By re-ordering this sequence,
userspace will only be able to change the MAC address _after_ we have
finished with setting the initial dev_addr.

Still, the same MAC address race can also occur during a subsequent call
to qeth_l2_set_online(). So keep around the locking for now, until a
follow-up patch fully resolves this.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agos390/qeth: consolidate open/stop netdev ops
Julian Wiedmann [Fri, 25 Jan 2019 14:44:18 +0000 (15:44 +0100)]
s390/qeth: consolidate open/stop netdev ops

The L2 and L3 code for these ops is almost identical, we only need to
provide a custom ndo_validate_addr() for L2 that checks whether
programming the MAC address succeeded.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agos390/qeth: remove bogus netif_wake_queue()
Julian Wiedmann [Fri, 25 Jan 2019 14:44:17 +0000 (15:44 +0100)]
s390/qeth: remove bogus netif_wake_queue()

qeth_qdio_cq_handler() doesn't replenish the Output Queue(s), and thus
has no reason to wake the txq.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agos390/qeth: streamline TX buffer management
Julian Wiedmann [Fri, 25 Jan 2019 14:44:16 +0000 (15:44 +0100)]
s390/qeth: streamline TX buffer management

Consolidate the code that marks the current buffer to be flushed, and
let qeth_fill_buffer() advance the Output Queue's buffer cursor.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoDocumentation: net: phy: reflect latest changes to phylib API
Heiner Kallweit [Fri, 25 Jan 2019 20:08:24 +0000 (21:08 +0100)]
Documentation: net: phy: reflect latest changes to phylib API

Recent changes to the phylib API
- removed phy_stop_interrupts
- replaced phy_start_interrupts with phy_request_interrupt
- moved some functionality from phy_connect() and phy_disconnect()
  to phy_start() and phy_stop() respectively.
Reflect these changes in the documentation.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoMerge tag 'mlx5-updates-2019-01-25' of git://git.kernel.org/pub/scm/linux/kernel...
David S. Miller [Sat, 26 Jan 2019 05:20:35 +0000 (21:20 -0800)]
Merge tag 'mlx5-updates-2019-01-25' of git://git./linux/kernel/git/saeed/linux

Saeed Mahameed says:

====================
mlx5-updates-2019-01-25

This series provides some updates to mlx5 driver,

From Tariq,
1) Make sure RX packet header does not cross page boundary
   To avoid page boundary crossing, use stride size that fits
   the maximum possible header. Stride is increased form 64B to 256B.

2) CQ struct cleanup: Take CQ decompress fields into a separate structure

From Moshe,
3) Expand XPS cpumask to cover all online cpus

From Jason Gunthorpe and Tariq:
4) Compilation warning cleanup

From Or,
5) Add trace points for flow tables create/destroy

From Saeed,
6) Software stats update/folding improvements
   this also solves a compilation warning on 32bit systems that was reported
   last release cycle by Arnd and Andrew.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoqed: Revert error handling changes.
David S. Miller [Fri, 25 Jan 2019 23:32:28 +0000 (15:32 -0800)]
qed: Revert error handling changes.

This is new code and not bug fixes.

This reverts all changes added by merge commit
8fb18be93efd7292d6ee403b9f61af1008239639

Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoMerge tag 'mmc-v5.0-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc
Linus Torvalds [Fri, 25 Jan 2019 23:07:03 +0000 (13:07 -1000)]
Merge tag 'mmc-v5.0-rc2' of git://git./linux/kernel/git/ulfh/mmc

Pull MMC fixes from Ulf Hansson:

 - sdhci-acpi: Fixup build dependency for PCI

 - sdhci-omap: Resolve Kconfig warnings on keystone

 - sdhci-iproc: Propagate errors from DT parsing

 - meson-gx: Fixup IRQ handling in release callback

 - meson-gx: Use signal re-sampling to fixup tuning

 - dw_mmc-bluefield: Fix the license information

* tag 'mmc-v5.0-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
  mmc: dw_mmc-bluefield: : Fix the license information
  mmc: meson-gx: enable signal re-sampling together with tuning
  mmc: sdhci-iproc: handle mmc_of_parse() errors during probe
  mmc: meson-gx: Free irq in release() callback
  mmc: host: Fix Kconfig warnings on keystone_defconfig
  mmc: sdhci-acpi: Make PCI dependency explicit

5 years agoMerge tag 'char-misc-5.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh...
Linus Torvalds [Fri, 25 Jan 2019 23:03:34 +0000 (13:03 -1000)]
Merge tag 'char-misc-5.0-rc4' of git://git./linux/kernel/git/gregkh/char-misc

Pull char/misc driver fixes from Greg KH:
 "Here are some small char and misc driver fixes to resolve some
  reported issues, as well as a number of binderfs fixups that were
  found after auditing the filesystem code by Al Viro. As binderfs
  hasn't been in a previous release yet, it's good to get these in now
  before the first users show up.

  All of these have been in linux-next for a bit with no reported
  issues"

* tag 'char-misc-5.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (26 commits)
  i3c: master: Fix an error checking typo in 'cdns_i3c_master_probe()'
  binderfs: switch from d_add() to d_instantiate()
  binderfs: drop lock in binderfs_binder_ctl_create
  binderfs: kill_litter_super() before cleanup
  binderfs: rework binderfs_binder_device_create()
  binderfs: rework binderfs_fill_super()
  binderfs: prevent renaming the control dentry
  binderfs: remove outdated comment
  binderfs: use __u32 for device numbers
  binderfs: use correct include guards in header
  misc: pvpanic: fix warning implicit declaration
  char/mwave: fix potential Spectre v1 vulnerability
  misc: ibmvsm: Fix potential NULL pointer dereference
  binderfs: fix error return code in binderfs_fill_super()
  mei: me: add denverton innovation engine device IDs
  mei: me: mark LBG devices as having dma support
  mei: dma: silent the reject message
  binderfs: handle !CONFIG_IPC_NS builds
  binderfs: reserve devices for initial mount
  binderfs: rename header to binderfs.h
  ...

5 years agoMerge tag 'staging-5.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh...
Linus Torvalds [Fri, 25 Jan 2019 23:02:12 +0000 (13:02 -1000)]
Merge tag 'staging-5.0-rc4' of git://git./linux/kernel/git/gregkh/staging

Pull staging driver fixes from Greg KH:
 "Here are some small staging driver fixes for 5.0-rc4.

  They resolve some reported bugs and add a new device id for one
  driver. Nothing major at all, but all good to have.

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'staging-5.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
  staging: android: ion: Support cpu access during dma_buf_detach
  staging: rtl8723bs: Fix build error with Clang when inlining is disabled
  staging: rtl8188eu: Add device code for D-Link DWA-121 rev B1
  staging: vchiq: Fix local event signalling
  Staging: wilc1000: unlock on error in init_chip()
  staging: wilc1000: fix memory leak in wilc_add_rx_gtk
  staging: wilc1000: fix registration frame size

5 years agoMerge tag 'tty-5.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Linus Torvalds [Fri, 25 Jan 2019 22:58:40 +0000 (12:58 -1000)]
Merge tag 'tty-5.0-rc4' of git://git./linux/kernel/git/gregkh/tty

Pull tty/serial driver fixes from Greg KH:
 "Here are a number of small tty core and serial driver fixes for
  5.0-rc4 to resolve some reported issues.

  Nothing major, the small serial driver fixes, a tty core fixup for a
  crash that was reported, and some good vt fixes from Nicolas Pitre as
  he seems to be auditing that chunk of code a lot lately.

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'tty-5.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
  serial: fsl_lpuart: fix maximum acceptable baud rate with over-sampling
  tty: serial: qcom_geni_serial: Allow mctrl when flow control is disabled
  tty: Handle problem if line discipline does not have receive_buf
  vgacon: unconfuse vc_origin when using soft scrollback
  vt: invoke notifier on screen size change
  vt: always call notifier with the console lock held
  vt: make vt_console_print() compatible with the unicode screen buffer
  tty/n_hdlc: fix __might_sleep warning
  serial: 8250: Fix serial8250 initialization crash
  uart: Fix crash in uart_write and uart_put_char

5 years agoMerge tag 'usb-5.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Linus Torvalds [Fri, 25 Jan 2019 22:57:09 +0000 (12:57 -1000)]
Merge tag 'usb-5.0-rc4' of git://git./linux/kernel/git/gregkh/usb

Pull USB/PHY fixes from Greg KH:
 "Here are a number of small USB and PHY driver fixes for 5.0-rc4.

  Nothing major at all, just the usual selection of USB gadget bugfixes,
  some new USB serial driver ids, some SPDX fixes, and some PHY driver
  fixes for reported issues.

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'usb-5.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
  USB: serial: keyspan_usa: add proper SPDX lines for .h files
  USB: EHCI: ehci-mv: add MODULE_DEVICE_TABLE
  USB: leds: fix regression in usbport led trigger
  usb: chipidea: fix static checker warning for NULL pointer
  MAINTAINERS: email address update in MAINTAINERS entries
  USB: usbip: delete README file
  USB: serial: pl2303: add new PID to support PL2303TB
  usb: dwc2: gadget: Fix Remote Wakeup interrupt bit clearing
  phy: ath79-usb: Fix the main reset name to match the DT binding
  phy: ath79-usb: Fix the power on error path
  phy: fix build breakage: add PHY_MODE_SATA
  phy: ti: ensure priv is not null before dereferencing it
  USB: serial: ftdi_sio: fix GPIO not working in autosuspend
  usb: gadget: Potential NULL dereference on allocation error
  usb: dwc3: gadget: Fix the uninitialized link_state when udc starts
  usb: dwc3: gadget: Clear req->needs_extra_trb flag on cleanup
  usb: dwc3: gadget: synchronize_irq dwc irq in suspend
  USB: serial: simple: add Motorola Tetra TPG2200 device id

5 years agonet/mlx5e: Reuse fold sw stats in representors
Saeed Mahameed [Wed, 12 Dec 2018 09:42:30 +0000 (01:42 -0800)]
net/mlx5e: Reuse fold sw stats in representors

Representors software stats are basic, this patch is reusing the
mlx5e_fold_sw_stats in representors, which sums up the basic stats64 for a
mlx5e netdevice.

Fixes: 8bfaf07f7806 ("net/mlx5e: Present SW stats when state is not opened")
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
5 years agonet/mlx5e: Present the representors SW stats when state is not opened
Tariq Toukan [Thu, 8 Nov 2018 09:37:24 +0000 (11:37 +0200)]
net/mlx5e: Present the representors SW stats when state is not opened

This behavior is already adopted for all other cases in the cited patch.
The representor's functions were missed, here we modify the them to
behave similarly.

Fixes: 8bfaf07f7806 ("net/mlx5e: Present SW stats when state is not opened")
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
5 years agonet/mlx5e: Separate between ethtool and netdev software stats folding
Saeed Mahameed [Sat, 3 Nov 2018 01:21:27 +0000 (18:21 -0700)]
net/mlx5e: Separate between ethtool and netdev software stats folding

mlx5e_grp_sw_update_stats can be called from two threads,
1) ndo_get_stats64
2) get_ethtool_stats

For this reason and to minimize concurrency issue impact on 64bit machines
mlx5e_grp_sw_update_stats folds the software stats into a temporary
variable then copies it to the global driver stats, both ethtool and ndo
statistics callbacks will use the global software stats variable to report
whatever stats they need.

Actually ndo_get_stats64 doesn't need to fold the whole software stats
(mlx5e_grp_sw_update_stats), all it needs is five counters to fill the
rtnl_link_stats64 relevant stats parameter.

Hence this patch introduces a simpler helper function to fold software
stats for ndo_get_stats64 which will work directly on rtnl_link_stats64
stats parameter and not on the global or even temporary mlx5e_sw_stats
variable.

Since now mlx5e_grp_sw_update_stats is not called by ndo_get_stats64 we
can make it static and remove the temp var.

Unlike mlx5e_grp_sw_update_stats the new fold stats function doesn't
need to zero out the output statistics parameter since it is already
done by the stack @dev_get_stats().

This patch is fixing stack usage of mlx5e_grp_sw_update_stats on
x86 gcc-4.9 and higher, the concurrency issue between mlx5's
ndo_get_stats64 and get_ethtool_stats is resolved as well.

Fixes: 8bfaf07f7806 ("net/mlx5e: Present SW stats when state is not opened")
Reported-by: Arnd Bergmann <arnd@arndb.de>
Reported-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
5 years agonet/mlx5: Add trace points for flow tables create/destroy
Or Gerlitz [Tue, 18 Dec 2018 19:18:20 +0000 (21:18 +0200)]
net/mlx5: Add trace points for flow tables create/destroy

We were not tracking flow tables so far, add it up.

Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
5 years agonet/mlx5e: Return the allocated flow directly from __mlx5e_add_fdb_flow
Jason Gunthorpe [Sun, 20 Jan 2019 08:30:25 +0000 (10:30 +0200)]
net/mlx5e: Return the allocated flow directly from __mlx5e_add_fdb_flow

This confusing construction confuses the compiler which can't see
that flow is initialized if !err:

drivers/net/ethernet/mellanox/mlx5/core/en_tc.c: In function `mlx5e_configure_flower`
drivers/net/ethernet/mellanox/mlx5/core/en_tc.c:2727:28: warning:
`flow` may be used uninitialized in this function
[-Wmaybe-uninitialized]

There is no reason for two function outputs, just return the
pointer directly and use ERR_PTR to encode a failure.

Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Reviewed-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
5 years agonet/mlx5e: Expand XPS cpumask to cover all online cpus
Moshe Shemesh [Thu, 25 Oct 2018 12:03:38 +0000 (15:03 +0300)]
net/mlx5e: Expand XPS cpumask to cover all online cpus

Currently we have one cpu in XPS cpumask per tx queue, this is good
enough for default configuration where there is a tx queue per cpu.
However, once configuration changes to use less tx queues, part of the
cpus are not XPS-mapped and so the select queue decision falls back to
hash calculation and balancing is not guaranteed.

Expand XPS cpumask to enable using all cpus even when number of tx
queues is smaller than number of cpus.

Signed-off-by: Moshe Shemesh <moshe@mellanox.com>
Reviewed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
5 years agonet/mlx5e: Take CQ decompress fields into a separate structure
Tariq Toukan [Wed, 12 Sep 2018 15:32:49 +0000 (18:32 +0300)]
net/mlx5e: Take CQ decompress fields into a separate structure

Only the Receive CQ makes use of these fields. Take them
out into a separate struct and save space in the generic
CQ structure.

Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
5 years agonet/mlx5e: RX, Make sure packet header does not cross page boundary
Tariq Toukan [Tue, 25 Sep 2018 09:05:22 +0000 (12:05 +0300)]
net/mlx5e: RX, Make sure packet header does not cross page boundary

In the non-linear SKB memory scheme of Striding RQ, a packet header
could cross page boundary. This requires special care in fast path
that costs LoC, additional runtime instructions and branches.

It could happen when the header (up to 256B) does not fit in
a single stride. Avoid this by working with a stride size that fits
the maximum possible header. Stride is increased form 64B to 256B.

Performance:
Tested packet rate for UDP streams, single ring, on ConnectX-5.

Configuration:
Set Striding RQ and LRO ON (to enabled the non-linear SKB scheme).
GRO OFF, early drop by TC rule.

64B: 4x worse memory utilization, no page-crossers headers
- No degradation (5,887,305 pps).
- The reduction in memory utilization is compensated by the saving of
  branches tests.

192B: 1.33x worse memory utilization, avoid page-crossers headers
- Before: 5,727,252. After: 5,777,037. ~1% gain.

256B: Same memory util, no page-crossers
- Before: 5,691,885. After: 5,748,007. ~1% gain.

Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
5 years agoMerge tag 'mac80211-for-davem-2019-01-25' of git://git.kernel.org/pub/scm/linux/kerne...
David S. Miller [Fri, 25 Jan 2019 18:59:36 +0000 (10:59 -0800)]
Merge tag 'mac80211-for-davem-2019-01-25' of git://git./linux/kernel/git/jberg/mac80211

Johannes Berg says:

====================
Just a few small fixes:
 * avoid trying to operate TDLS when not connection,
   this is not valid and led to issues
 * count TTL-dropped frames in mesh better
 * deal with new WiGig channels in regulatory code
 * remove a WARN_ON() that can trigger due to benign
   races during device/driver registration
 * fix nested netlink policy maxattrs (syzkaller)
 * fix hwsim n_limits (syzkaller)
 * propagate __aligned(2) to a surrounding struct
 * return proper error in virt_wifi error path
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: Revert devlink health changes.
David S. Miller [Fri, 25 Jan 2019 18:53:23 +0000 (10:53 -0800)]
net: Revert devlink health changes.

This reverts the devlink health changes from 9/17/2019,
Jiri wants things to be designed differently and it was
agreed that the easiest way to do this is start from the
beginning again.

Commits reverted:

cb5ccfbe73b389470e1dc11061bb185ef4bc9aec
880ee82f0313453ec5a6cb122866ac057263066b
c7af343b4e33578b7de91786a3f639c8cfa0d97b
ff253fedab961b22117a73ab808fcfa9e6852b50
6f9d56132eb6d2603d4273cfc65bed914ec47acb
fcd852c69d776c0f46c8f79e8e431e5cc6ddc7b7
8a66704a13d9713593342e29b4f0c19762f5746b
12bd0dcefe88782ac1c9fff632958dd1b71d27e5
aba25279c10094c5c97d09c3491ca86d00b4ad5e
ce019faa70f81555fa17ebc1d5a03651f2e7e15a
b8c45a033acc607201588f7665ba84207e5149e0

And the follow-on build fix:

o33a0efa4baecd689da9474ce0e8b673eb6931c60

Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoKVM: x86: Mark expected switch fall-throughs
Gustavo A. R. Silva [Fri, 25 Jan 2019 18:23:17 +0000 (12:23 -0600)]
KVM: x86: Mark expected switch fall-throughs

In preparation to enabling -Wimplicit-fallthrough, mark switch
cases where we are expecting to fall through.

This patch fixes the following warnings:

arch/x86/kvm/lapic.c:1037:27: warning: this statement may fall through [-Wimplicit-fallthrough=]
arch/x86/kvm/lapic.c:1876:3: warning: this statement may fall through [-Wimplicit-fallthrough=]
arch/x86/kvm/hyperv.c:1637:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
arch/x86/kvm/svm.c:4396:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
arch/x86/kvm/mmu.c:4372:36: warning: this statement may fall through [-Wimplicit-fallthrough=]
arch/x86/kvm/x86.c:3835:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
arch/x86/kvm/x86.c:7938:23: warning: this statement may fall through [-Wimplicit-fallthrough=]
arch/x86/kvm/vmx/vmx.c:2015:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
arch/x86/kvm/vmx/vmx.c:1773:6: warning: this statement may fall through [-Wimplicit-fallthrough=]

Warning level 3 was used: -Wimplicit-fallthrough=3

This patch is part of the ongoing efforts to enabling -Wimplicit-fallthrough.

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agoKVM: x86: fix TRACE_INCLUDE_PATH and remove -I. header search paths
Masahiro Yamada [Fri, 25 Jan 2019 07:32:46 +0000 (16:32 +0900)]
KVM: x86: fix TRACE_INCLUDE_PATH and remove -I. header search paths

The header search path -I. in kernel Makefiles is very suspicious;
it allows the compiler to search for headers in the top of $(srctree),
where obviously no header file exists.

The reason of having -I. here is to make the incorrectly set
TRACE_INCLUDE_PATH working.

As the comment block in include/trace/define_trace.h says,
TRACE_INCLUDE_PATH should be a relative path to the define_trace.h

Fix the TRACE_INCLUDE_PATH, and remove the iffy include paths.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agoKVM: selftests: check returned evmcs version range
Vitaly Kuznetsov [Thu, 17 Jan 2019 17:12:10 +0000 (18:12 +0100)]
KVM: selftests: check returned evmcs version range

Check that KVM_CAP_HYPERV_ENLIGHTENED_VMCS returns correct version range.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agox86/kvm/hyper-v: nested_enable_evmcs() sets vmcs_version incorrectly
Vitaly Kuznetsov [Thu, 17 Jan 2019 17:12:09 +0000 (18:12 +0100)]
x86/kvm/hyper-v: nested_enable_evmcs() sets vmcs_version incorrectly

Commit e2e871ab2f02 ("x86/kvm/hyper-v: Introduce nested_get_evmcs_version()
helper") broke EVMCS enablement: to set vmcs_version we now call
nested_get_evmcs_version() but this function checks
enlightened_vmcs_enabled flag which is not yet set so we end up returning
zero.

Fix the issue by re-arranging things in nested_enable_evmcs().

Fixes: e2e871ab2f02 ("x86/kvm/hyper-v: Introduce nested_get_evmcs_version() helper")
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agoKVM: VMX: Move vmx_vcpu_run()'s VM-Enter asm blob to a helper function
Sean Christopherson [Wed, 16 Jan 2019 01:10:53 +0000 (17:10 -0800)]
KVM: VMX: Move vmx_vcpu_run()'s VM-Enter asm blob to a helper function

...along with the function's STACK_FRAME_NON_STANDARD tag.  Moving the
asm blob results in a significantly smaller amount of code that is
marked with STACK_FRAME_NON_STANDARD, which makes it far less likely
that gcc will split the function and trigger a spurious objtool warning.
As a bonus, removing STACK_FRAME_NON_STANDARD from vmx_vcpu_run() allows
the bulk of code to be properly checked by objtool.

Because %rbp is not loaded via VMCS fields, vmx_vcpu_run() must manually
save/restore the host's RBP and load the guest's RBP prior to calling
vmx_vmenter().  Modifying %rbp triggers objtool's stack validation code,
and so vmx_vcpu_run() is tagged with STACK_FRAME_NON_STANDARD since it's
impossible to avoid modifying %rbp.

Unfortunately, vmx_vcpu_run() is also a gigantic function that gcc will
split into separate functions, e.g. so that pieces of the function can
be inlined.  Splitting the function means that the compiled Elf file
will contain one or more vmx_vcpu_run.part.* functions in addition to
a vmx_vcpu_run function.  Depending on where the function is split,
objtool may warn about a "call without frame pointer save/setup" in
vmx_vcpu_run.part.* since objtool's stack validation looks for exact
names when whitelisting functions tagged with STACK_FRAME_NON_STANDARD.

Up until recently, the undesirable function splitting was effectively
blocked because vmx_vcpu_run() was tagged with __noclone.  At the time,
__noclone had an unintended side effect that put vmx_vcpu_run() into a
separate optimization unit, which in turn prevented gcc from inlining
the function (or any of its own function calls) and thus eliminated gcc's
motivation to split the function.  Removing the __noclone attribute
allowed gcc to optimize vmx_vcpu_run(), exposing the objtool warning.

Kudos to Qian Cai for root causing that the fnsplit optimization is what
caused objtool to complain.

Fixes: 453eafbe65f7 ("KVM: VMX: Move VM-Enter + VM-Exit handling to non-inline sub-routines")
Tested-by: Qian Cai <cai@lca.pw>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agokvm: selftests: Fix region overlap check in kvm_util
Ben Gardon [Wed, 16 Jan 2019 17:41:15 +0000 (09:41 -0800)]
kvm: selftests: Fix region overlap check in kvm_util

Fix a call to userspace_mem_region_find to conform to its spec of
taking an inclusive, inclusive range. It was previously being called
with an inclusive, exclusive range. Also remove a redundant region bounds
check in vm_userspace_mem_region_add. Region overlap checking is already
performed by the call to userspace_mem_region_find.

Tested: Compiled tools/testing/selftests/kvm with -static
Ran all resulting test binaries on an Intel Haswell test machine
All tests passed

Signed-off-by: Ben Gardon <bgardon@google.com>
Reviewed-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agokvm: vmx: fix some -Wmissing-prototypes warnings
Yi Wang [Mon, 21 Jan 2019 07:27:05 +0000 (15:27 +0800)]
kvm: vmx: fix some -Wmissing-prototypes warnings

We get some warnings when building kernel with W=1:
arch/x86/kvm/vmx/vmx.c:426:5: warning: no previous prototype for ‘kvm_fill_hv_flush_list_func’ [-Wmissing-prototypes]
arch/x86/kvm/vmx/nested.c:58:6: warning: no previous prototype for ‘init_vmcs_shadow_fields’ [-Wmissing-prototypes]

Make them static to fix this.

Signed-off-by: Yi Wang <wang.yi59@zte.com.cn>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agoKVM: nSVM: clear events pending from svm_complete_interrupts() when exiting to L1
Vitaly Kuznetsov [Mon, 7 Jan 2019 18:44:51 +0000 (19:44 +0100)]
KVM: nSVM: clear events pending from svm_complete_interrupts() when exiting to L1

kvm-unit-tests' eventinj "NMI failing on IDT" test results in NMI being
delivered to the host (L1) when it's running nested. The problem seems to
be: svm_complete_interrupts() raises 'nmi_injected' flag but later we
decide to reflect EXIT_NPF to L1. The flag remains pending and we do NMI
injection upon entry so it got delivered to L1 instead of L2.

It seems that VMX code solves the same issue in prepare_vmcs12(), this was
introduced with code refactoring in commit 5f3d5799974b ("KVM: nVMX: Rework
event injection and recovery").

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agosvm: Fix AVIC incomplete IPI emulation
Suravee Suthikulpanit [Tue, 22 Jan 2019 10:25:13 +0000 (10:25 +0000)]
svm: Fix AVIC incomplete IPI emulation

In case of incomplete IPI with invalid interrupt type, the current
SVM driver does not properly emulate the IPI, and fails to boot
FreeBSD guests with multiple vcpus when enabling AVIC.

Fix this by update APIC ICR high/low registers, which also
emulate sending the IPI.

Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agosvm: Add warning message for AVIC IPI invalid target
Suravee Suthikulpanit [Tue, 22 Jan 2019 10:24:19 +0000 (10:24 +0000)]
svm: Add warning message for AVIC IPI invalid target

Print warning message when IPI target ID is invalid due to one of
the following reasons:
  * In logical mode: cluster > max_cluster (64)
  * In physical mode: target > max_physical (512)
  * Address is not present in the physical or logical ID tables

Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agoKVM: x86: WARN_ONCE if sending a PV IPI returns a fatal error
Sean Christopherson [Wed, 23 Jan 2019 17:22:40 +0000 (09:22 -0800)]
KVM: x86: WARN_ONCE if sending a PV IPI returns a fatal error

KVM hypercalls return a negative value error code in case of a fatal
error, e.g. when the hypercall isn't supported or was made with invalid
parameters.  WARN_ONCE on fatal errors when sending PV IPIs as any such
error all but guarantees an SMP system will hang due to a missing IPI.

Fixes: aaffcfd1e82d ("KVM: X86: Implement PV IPIs in linux guest")
Cc: stable@vger.kernel.org
Cc: Wanpeng Li <wanpengli@tencent.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agoKVM: x86: Fix PV IPIs for 32-bit KVM host
Sean Christopherson [Wed, 23 Jan 2019 17:22:39 +0000 (09:22 -0800)]
KVM: x86: Fix PV IPIs for 32-bit KVM host

The recognition of the KVM_HC_SEND_IPI hypercall was unintentionally
wrapped in "#ifdef CONFIG_X86_64", causing 32-bit KVM hosts to reject
any and all PV IPI requests despite advertising the feature.  This
results in all KVM paravirtualized guests hanging during SMP boot due
to IPIs never being delivered.

Fixes: 4180bf1b655a ("KVM: X86: Implement "send IPI" hypercall")
Cc: stable@vger.kernel.org
Cc: Wanpeng Li <wanpengli@tencent.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agox86/kvm/hyper-v: recommend using eVMCS only when it is enabled
Vitaly Kuznetsov [Fri, 25 Jan 2019 11:19:34 +0000 (12:19 +0100)]
x86/kvm/hyper-v: recommend using eVMCS only when it is enabled

We shouldn't probably be suggesting using Enlightened VMCS when it's not
enabled (not supported from guest's point of view). Hyper-V on KVM seems
to be fine either way but let's be consistent.

Fixes: 2bc39970e932 ("x86/kvm/hyper-v: Introduce KVM_GET_SUPPORTED_HV_CPUID")
Reviewed-by: Liran Alon <liran.alon@oracle.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agox86/kvm/hyper-v: don't recommend doing reset via synthetic MSR
Vitaly Kuznetsov [Fri, 25 Jan 2019 11:19:33 +0000 (12:19 +0100)]
x86/kvm/hyper-v: don't recommend doing reset via synthetic MSR

System reset through synthetic MSR is not recommended neither by genuine
Hyper-V nor my QEMU.

Fixes: 2bc39970e932 ("x86/kvm/hyper-v: Introduce KVM_GET_SUPPORTED_HV_CPUID")
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: Liran Alon <liran.alon@oracle.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
5 years agokvm: x86/vmx: Use kzalloc for cached_vmcs12
Tom Roeder [Thu, 24 Jan 2019 21:48:20 +0000 (13:48 -0800)]
kvm: x86/vmx: Use kzalloc for cached_vmcs12

This changes the allocation of cached_vmcs12 to use kzalloc instead of
kmalloc. This removes the information leak found by Syzkaller (see
Reported-by) in this case and prevents similar leaks from happening
based on cached_vmcs12.

It also changes vmx_get_nested_state to copy out the full 4k VMCS12_SIZE
in copy_to_user rather than only the size of the struct.

Tested: rebuilt against head, booted, and ran the syszkaller repro
  https://syzkaller.appspot.com/text?tag=ReproC&x=174efca3400000 without
  observing any problems.

Reported-by: syzbot+ded1696f6b50b615b630@syzkaller.appspotmail.com
Fixes: 8fcc4b5923af5de58b80b53a069453b135693304
Cc: stable@vger.kernel.org
Signed-off-by: Tom Roeder <tmroeder@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>