linux.git/arch/xtensa/include/asm, branch v5.1

Merge tag 'xtensa-20190408' of git://github.com/jcmvbkbc/linux-xtensa

2019-04-09T03:04:42+00:00

Pull xtensa fixes from Max Filippov:

 - fix syscall number passed to trace_sys_exit

 - fix syscall number initialization in start_thread

 - fix level interpretation in the return_address

 - fix format string warning in init_pmd

* tag 'xtensa-20190408' of git://github.com/jcmvbkbc/linux-xtensa:
  xtensa: fix format string warning in init_pmd
  xtensa: fix return_address
  xtensa: fix initialization of pt_regs::syscall in start_thread
  xtensa: use actual syscall number in do_syscall_trace_leave

syscalls: Remove start and number from syscall_set_arguments() args

2019-04-05T13:27:23+00:00

After removing the start and count arguments of syscall_get_arguments() it
seems reasonable to remove them from syscall_set_arguments(). Note, as of
today, there are no users of syscall_set_arguments(). But we are told that
there will be soon. But for now, at least make it consistent with
syscall_get_arguments().

Link: http://lkml.kernel.org/r/20190327222014.GA32540@altlinux.org

Cc: Oleg Nesterov 
Cc: Kees Cook 
Cc: Andy Lutomirski 
Cc: Dominik Brodowski 
Cc: Dave Martin 
Cc: "Dmitry V. Levin" 
Cc: x86@kernel.org
Cc: linux-snps-arc@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-c6x-dev@linux-c6x.org
Cc: uclinux-h8-devel@lists.sourceforge.jp
Cc: linux-hexagon@vger.kernel.org
Cc: linux-ia64@vger.kernel.org
Cc: linux-mips@vger.kernel.org
Cc: nios2-dev@lists.rocketboards.org
Cc: openrisc@lists.librecores.org
Cc: linux-parisc@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux-riscv@lists.infradead.org
Cc: linux-s390@vger.kernel.org
Cc: linux-sh@vger.kernel.org
Cc: sparclinux@vger.kernel.org
Cc: linux-um@lists.infradead.org
Cc: linux-xtensa@linux-xtensa.org
Cc: linux-arch@vger.kernel.org
Acked-by: Max Filippov  # For xtensa changes
Acked-by: Will Deacon  # For the arm64 bits
Reviewed-by: Thomas Gleixner  # for x86
Reviewed-by: Dmitry V. Levin 
Signed-off-by: Steven Rostedt (VMware)

syscalls: Remove start and number from syscall_get_arguments() args

2019-04-05T13:26:43+00:00

At Linux Plumbers, Andy Lutomirski approached me and pointed out that the
function call syscall_get_arguments() implemented in x86 was horribly
written and not optimized for the standard case of passing in 0 and 6 for
the starting index and the number of system calls to get. When looking at
all the users of this function, I discovered that all instances pass in only
0 and 6 for these arguments. Instead of having this function handle
different cases that are never used, simply rewrite it to return the first 6
arguments of a system call.

This should help out the performance of tracing system calls by ptrace,
ftrace and perf.

Link: http://lkml.kernel.org/r/20161107213233.754809394@goodmis.org

Cc: Oleg Nesterov 
Cc: Kees Cook 
Cc: Andy Lutomirski 
Cc: Dominik Brodowski 
Cc: Dave Martin 
Cc: "Dmitry V. Levin" 
Cc: x86@kernel.org
Cc: linux-snps-arc@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-c6x-dev@linux-c6x.org
Cc: uclinux-h8-devel@lists.sourceforge.jp
Cc: linux-hexagon@vger.kernel.org
Cc: linux-ia64@vger.kernel.org
Cc: linux-mips@vger.kernel.org
Cc: nios2-dev@lists.rocketboards.org
Cc: openrisc@lists.librecores.org
Cc: linux-parisc@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux-riscv@lists.infradead.org
Cc: linux-s390@vger.kernel.org
Cc: linux-sh@vger.kernel.org
Cc: sparclinux@vger.kernel.org
Cc: linux-um@lists.infradead.org
Cc: linux-xtensa@linux-xtensa.org
Cc: linux-arch@vger.kernel.org
Acked-by: Paul Burton  # MIPS parts
Acked-by: Max Filippov  # For xtensa changes
Acked-by: Will Deacon  # For the arm64 bits
Reviewed-by: Thomas Gleixner  # for x86
Reviewed-by: Dmitry V. Levin 
Reported-by: Andy Lutomirski 
Signed-off-by: Steven Rostedt (VMware)

xtensa: fix initialization of pt_regs::syscall in start_thread

2019-04-04T06:18:39+00:00

New pt_regs should indicate that there's no syscall, not that there's
syscall #0. While at it wrap macro body in do/while and parenthesize
macro arguments.

Signed-off-by: Max Filippov

KVM: export and iif KVM is supported

2019-03-28T16:27:42+00:00

I do not see any consistency about headers_install of 
and .

According to my analysis of Linux 5.1-rc1, there are 3 groups:

 [1] Both  and  are exported

    alpha, arm, hexagon, mips, powerpc, s390, sparc, x86

 [2]  is exported, but  is not

    arc, arm64, c6x, h8300, ia64, m68k, microblaze, nios2, openrisc,
    parisc, sh, unicore32, xtensa

 [3] Neither  nor  is exported

    csky, nds32, riscv

This does not match to the actual KVM support. At least, [2] is
half-baked.

Nor do arch maintainers look like they care about this. For example,
commit 0add53713b1c ("microblaze: Add missing kvm_para.h to Kbuild")
exported  to user-space in order to fix an in-kernel
build error.

We have two ways to make this consistent:

 [A] export both  and  for all
     architectures, irrespective of the KVM support

 [B] Match the header export of  and 
     to the KVM support

My first attempt was [A] because the code looks cleaner, but Paolo
suggested [B].

So, this commit goes with [B].

For most architectures,  was moved to the kernel-space.
I changed include/uapi/linux/Kbuild so that it checks generated
asm/kvm_para.h as well as check-in ones.

After this commit, there will be two groups:

 [1] Both  and  are exported

    arm, arm64, mips, powerpc, s390, x86

 [2] Neither  nor  is exported

    alpha, arc, c6x, csky, h8300, hexagon, ia64, m68k, microblaze,
    nds32, nios2, openrisc, parisc, riscv, sh, sparc, unicore32, xtensa

Signed-off-by: Masahiro Yamada 
Acked-by: Cornelia Huck 
Signed-off-by: Paolo Bonzini

kbuild: warn redundant generic-y

2019-03-17T03:56:31+00:00

The generic-y is redundant under the following condition:

 - arch has its own implementation

 - the same header is added to generated-y

 - the same header is added to mandatory-y

If a redundant generic-y is found, the warning like follows is displayed:

  scripts/Makefile.asm-generic:20: redundant generic-y found in arch/arm/include/asm/Kbuild: timex.h

I fixed up arch Kbuild files found by this.

Suggested-by: Sam Ravnborg 
Signed-off-by: Masahiro Yamada

Merge tag 'xtensa-20190307' of git://github.com/jcmvbkbc/linux-xtensa

2019-03-07T21:27:53+00:00

Pull xtensa updates from Max Filippov:

 - use generic spinlock/rwlock implementations

 - clean up IPI processing

 - document boot parameters passing to the kernel

 - fix get_wchan

 - various cleanups in time.c, process.c, traps.c and thread_info.h

* tag 'xtensa-20190307' of git://github.com/jcmvbkbc/linux-xtensa:
  xtensa: simplify trap_init
  xtensa: drop unused definitions
  xtensa: fix get_wchan
  xtensa: use generic spinlock/rwlock implementation
  xtensa: provide xchg for sizes 1 and 2
  xtensa: clean up arch/xtensa/kernel/time.c
  xtensa: SMP: rework IPI processing
  xtensa: document boot parameter passing

Merge branch 'timers-2038-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2019-03-05T22:08:26+00:00

Pull year 2038 updates from Thomas Gleixner:
 "Another round of changes to make the kernel ready for 2038. After lots
  of preparatory work this is the first set of syscalls which are 2038
  safe:

    403 clock_gettime64
    404 clock_settime64
    405 clock_adjtime64
    406 clock_getres_time64
    407 clock_nanosleep_time64
    408 timer_gettime64
    409 timer_settime64
    410 timerfd_gettime64
    411 timerfd_settime64
    412 utimensat_time64
    413 pselect6_time64
    414 ppoll_time64
    416 io_pgetevents_time64
    417 recvmmsg_time64
    418 mq_timedsend_time64
    419 mq_timedreceiv_time64
    420 semtimedop_time64
    421 rt_sigtimedwait_time64
    422 futex_time64
    423 sched_rr_get_interval_time64

  The syscall numbers are identical all over the architectures"

* 'timers-2038-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (36 commits)
  riscv: Use latest system call ABI
  checksyscalls: fix up mq_timedreceive and stat exceptions
  unicore32: Fix __ARCH_WANT_STAT64 definition
  asm-generic: Make time32 syscall numbers optional
  asm-generic: Drop getrlimit and setrlimit syscalls from default list
  32-bit userspace ABI: introduce ARCH_32BIT_OFF_T config option
  compat ABI: use non-compat openat and open_by_handle_at variants
  y2038: add 64-bit time_t syscalls to all 32-bit architectures
  y2038: rename old time and utime syscalls
  y2038: remove struct definition redirects
  y2038: use time32 syscall names on 32-bit
  syscalls: remove obsolete __IGNORE_ macros
  y2038: syscalls: rename y2038 compat syscalls
  x86/x32: use time64 versions of sigtimedwait and recvmmsg
  timex: change syscalls to use struct __kernel_timex
  timex: use __kernel_timex internally
  sparc64: add custom adjtimex/clock_adjtime functions
  time: fix sys_timer_settime prototype
  time: Add struct __kernel_timex
  time: make adjtime compat handling available for 32 bit
  ...

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

2019-03-05T16:26:13+00:00

Pull networking updates from David Miller:
"Here we go, another merge window full of networking and #ebpf changes:

1) Snoop DHCPACKS in batman-adv to learn MAC/IP pairs in the DHCP
range without dealing with floods of ARP traffic, from Linus
Lüssing.

2) Throttle buffered multicast packet transmission in mt76, from
Felix Fietkau.

3) Support adaptive interrupt moderation in ice, from Brett Creeley.

4) A lot of struct_size conversions, from Gustavo A. R. Silva.

5) Add peek/push/pop commands to bpftool, as well as bash completion,
from Stanislav Fomichev.

6) Optimize sk_msg_clone(), from Vakul Garg.

7) Add SO_BINDTOIFINDEX, from David Herrmann.

8) Be more conservative with local resends due to local congestion,
from Yuchung Cheng.

9) Allow vetoing of unsupported VXLAN FDBs, from Petr Machata.

10) Add health buffer support to devlink, from Eran Ben Elisha.

11) Add TXQ scheduling API to mac80211, from Toke Høiland-Jørgensen.

12) Add statistics to basic packet scheduler filter, from Cong Wang.

13) Add GRE tunnel support for mlxsw Spectrum-2, from Nir Dotan.

14) Lots of new IP tunneling forwarding tests, also from Nir Dotan.

15) Add 3ad stats to bonding, from Nikolay Aleksandrov.

16) Lots of probing improvements for bpftool, from Quentin Monnet.

17) Various nfp drive #ebpf JIT improvements from Jakub Kicinski.

18) Allow #ebpf programs to access gso_segs from skb shared info, from
Eric Dumazet.

19) Add sock_diag support for AF_XDP sockets, from Björn Töpel.

20) Support 22260 iwlwifi devices, from Luca Coelho.

21) Use rbtree for ipv6 defragmentation, from Peter Oskolkov.

22) Add JMP32 instruction class support to #ebpf, from Jiong Wang.

23) Add spinlock support to #ebpf, from Alexei Starovoitov.

24) Support 256-bit keys and TLS 1.3 in ktls, from Dave Watson.

25) Add device infomation API to devlink, from Jakub Kicinski.

26) Add new timestamping socket options which are y2038 safe, from
Deepa Dinamani.

27) Add RX checksum offloading for various sh_eth chips, from Sergei
Shtylyov.

28) Flow offload infrastructure, from Pablo Neira Ayuso.

29) Numerous cleanups, improvements, and bug fixes to the PHY layer
and many drivers from Heiner Kallweit.

30) Lots of changes to try and make packet scheduler classifiers run
lockless as much as possible, from Vlad Buslov.

31) Support BCM957504 chip in bnxt_en driver, from Erik Burrows.

32) Add concurrency tests to tc-tests infrastructure, from Vlad
Buslov.

33) Add hwmon support to aquantia, from Heiner Kallweit.

34) Allow 64-bit values for SO_MAX_PACING_RATE, from Eric Dumazet.

And I would be remiss if I didn't thank the various major networking
subsystem maintainers for integrating much of this work before I even
saw it. Alexei Starovoitov, Daniel Borkmann, Pablo Neira Ayuso,
Johannes Berg, Kalle Valo, and many others. Thank you!"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (2207 commits)
net/sched: avoid unused-label warning
net: ignore sysctl_devconf_inherit_init_net without SYSCTL
phy: mdio-mux: fix Kconfig dependencies
net: phy: use phy_modify_mmd_changed in genphy_c45_an_config_aneg
net: dsa: mv88e6xxx: add call to mv88e6xxx_ports_cmode_init to probe for new DSA framework
selftest/net: Remove duplicate header
sky2: Disable MSI on Dell Inspiron 1545 and Gateway P-79
net/mlx5e: Update tx reporter status in case channels were successfully opened
devlink: Add support for direct reporter health state update
devlink: Update reporter state to error even if recover aborted
sctp: call iov_iter_revert() after sending ABORT
team: Free BPF filter when unregistering netdev
ip6mr: Do not call __IP6_INC_STATS() from preemptible context
isdn: mISDN: Fix potential NULL pointer dereference of kzalloc
net: dsa: mv88e6xxx: support in-band signalling on SGMII ports with external PHYs
cxgb4/chtls: Prefix adapter flags with CXGB4
net-sysfs: Switch to bitmap_zalloc()
mellanox: Switch to bitmap_zalloc()
bpf: add test cases for non-pointer sanitiation logic
mlxsw: i2c: Extend initialization by querying resources data
...

get rid of legacy 'get_ds()' function

2019-03-04T18:50:14+00:00

Every in-kernel use of this function defined it to KERNEL_DS (either as
an actual define, or as an inline function).  It's an entirely
historical artifact, and long long long ago used to actually read the
segment selector valueof '%ds' on x86.

Which in the kernel is always KERNEL_DS.

Inspired by a patch from Jann Horn that just did this for a very small
subset of users (the ones in fs/), along with Al who suggested a script.
I then just took it to the logical extreme and removed all the remaining
gunk.

Roughly scripted with

   git grep -l '(get_ds())' -- :^tools/ | xargs sed -i 's/(get_ds())/(KERNEL_DS)/'
   git grep -lw 'get_ds' -- :^tools/ | xargs sed -i '/^#define get_ds()/d'

plus manual fixups to remove a few unusual usage patterns, the couple of
inline function cases and to fix up a comment that had become stale.

The 'get_ds()' function remains in an x86 kvm selftest, since in user
space it actually does something relevant.

Inspired-by: Jann Horn 
Inspired-by: Al Viro 
Signed-off-by: Linus Torvalds