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Since the eBPF machine has 64-bit registers, we only support this in
64-bit kernels. As of the writing of this commit log test-bpf is showing:
test_bpf: Summary: 316 PASSED, 0 FAILED, [308/308 JIT'ed]
All current test cases are successfully compiled.
Many examples in samples/bpf are usable, specifically tracex5 which
uses tail calls works.
Signed-off-by: David Daney <david.daney@cavium.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Markos Chandras <markos.chandras@imgtec.com>
Cc: Matt Redfearn <matt.redfearn@imgtec.com>
Cc: netdev@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/16369/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Follow on patches for eBPF JIT require these additional instructions:
insn_bgtz, insn_blez, insn_break, insn_ddivu, insn_dmultu,
insn_dsbh, insn_dshd, insn_dsllv, insn_dsra32, insn_dsrav,
insn_dsrlv, insn_lbu, insn_movn, insn_movz, insn_multu, insn_nor,
insn_sb, insn_sh, insn_slti, insn_dinsu, insn_lwu
... so, add them.
Sort the insn_* enumeration values alphabetically.
Signed-off-by: David Daney <david.daney@cavium.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Matt Redfearn <matt.redfearn@imgtec.com>
Cc: netdev@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/16367/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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DSHD was incorrectly classified as being BSHFL, and DSHD was missing
altogether.
Signed-off-by: David Daney <david.daney@cavium.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Matt Redfearn <matt.redfearn@imgtec.com>
Cc: netdev@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/16366/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Instead of doing a linear search through the insn_table for each
instruction, use the opcode as direct index into the table. This will
give constant time lookup performance as the number of supported
opcodes increases. Make the tables const as they are only ever read.
For uasm-mips.c sort the table alphabetically, and remove duplicate
entries, uasm-micromips.c was already sorted and duplicate free.
There is a small savings in object size as struct insn loses a field:
$ size arch/mips/mm/uasm-mips.o arch/mips/mm/uasm-mips.o.save
text data bss dec hex filename
10040 0 0 10040 2738 arch/mips/mm/uasm-mips.o
9240 1120 0 10360 2878 arch/mips/mm/uasm-mips.o.save
Signed-off-by: David Daney <david.daney@cavium.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Matt Redfearn <matt.redfearn@imgtec.com>
Cc: netdev@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/16365/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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The module load code has previously had entirely separate
implementations for rel & rela style relocs, which unnecessarily
duplicates a whole lot of code. Unify the implementations of both types
of reloc, sharing the bulk of the code.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/15832/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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If we hit an error whilst processing a reloc then we would return early
from apply_relocate & potentially not free entries in r_mips_hi16_list,
thereby leaking memory. Fix this by ensuring that we always run the code
to free r_mipps_hi16_list when errors occur.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Fixes: 861667dc82f5 ("MIPS: Fix race condition in module relocation code.")
Fixes: 04211a574641 ("MIPS: Bail on unsupported module relocs")
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/15831/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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If accumulator value is zero, just return the value of previously
calculated product. This brings logic in MADDF/MSUBF implementation
closer to the logic in ADD/SUB case.
Signed-off-by: Miodrag Dinic <miodrag.dinic@imgtec.com>
Signed-off-by: Goran Ferenc <goran.ferenc@imgtec.com>
Signed-off-by: Aleksandar Markovic <aleksandar.markovic@imgtec.com>
Cc: James.Hogan@imgtec.com
Cc: Paul.Burton@imgtec.com
Cc: Raghu.Gandham@imgtec.com
Cc: Leonid.Yegoshin@imgtec.com
Cc: Douglas.Leung@imgtec.com
Cc: Petar.Jovanovic@imgtec.com
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/16512/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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In this sequence the 'move' is assumed in the delay slot of the 'beq',
but head.S is in reorder mode and the former gets pushed one 'nop'
farther by the assembler.
The corrected behavior made booting with an UHI supplied dtb erratic.
Fixes: 15f37e158892 ("MIPS: store the appended dtb address in a variable")
Signed-off-by: Karl Beldan <karl.beldan+oss@gmail.com>
Reviewed-by: James Hogan <james.hogan@imgtec.com>
Cc: Jonas Gorski <jogo@openwrt.org>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: stable@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/16614/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Remove old, dead Kconfig options (in order appearing in this commit):
- EXPERIMENTAL is gone since v3.9;
- INET_LRO: commit 7bbf3cae65b6 ("ipv4: Remove inet_lro library");
- MTD_CONCAT: commit f53fdebcc3e1 ("mtd: drop MTD_CONCAT from Kconfig
entirely");
- MTD_CHAR: commit 660685d9d1b4 ("mtd: merge mtdchar module with
mtdcore");
- NETDEV_1000 and NETDEV_10000: commit f860b0522f65 ("drivers/net:
Kconfig and Makefile cleanup"); NET_ETHERNET should be replaced with
just ETHERNET but that is separate change;
- MISC_DEVICES: commit 7c5763b8453a ("drivers: misc: Remove
MISC_DEVICES config option");
- HID_SUPPORT: commit 1f41a6a99476 ("HID: Fix the generic Kconfig
options");
- BT_L2CAP and BT_SCO: commit f1e91e1640d8 ("Bluetooth: Always compile
SCO and L2CAP in Bluetooth Core");
- DEBUG_ERRORS: commit b025a3f836d1 ("ARM: 6876/1: Kconfig.debug:
Remove unused CONFIG_DEBUG_ERRORS");
- USB_DEVICE_CLASS: commit 007bab91324e ("USB: remove
CONFIG_USB_DEVICE_CLASS");
- RCU_CPU_STALL_DETECTOR: commit a00e0d714fbd ("rcu: Remove conditional
compilation for RCU CPU stall warnings");
- IP_NF_QUEUE: commit 3dd6664fac7e ("netfilter: remove unused "config
IP_NF_QUEUE"");
- IP_NF_TARGET_ULOG: commit d4da843e6fad ("netfilter: kill remnants of
ulog targets");
- IP6_NF_QUEUE: commit d16cf20e2f2f ("netfilter: remove ip_queue
support");
- IP6_NF_TARGET_LOG: commit 6939c33a757b ("netfilter: merge ipt_LOG and
ip6_LOG into xt_LOG");
- USB_LED: commit a335aaf3125c ("usb: misc: remove outdated USB LED
driver");
- MMC_UNSAFE_RESUME: commit 2501c9179dff ("mmc: core: Use
MMC_UNSAFE_RESUME as default behavior");
- AUTOFS_FS: commit 561c5cf9236a ("staging: Remove autofs3");
- VIDEO_OUTPUT_CONTROL: commit f167a64e9d67 ("video / output: Drop
display output class support");
- USB_LIBUSUAL: commit f61870ee6f8c ("usb: remove libusual");
- CRYPTO_ZLIB: 110492183c4b ("crypto: compress - remove unused pcomp
interface");
- BLK_DEV_UB: commit 68a5059ecf82 ("block: remove the deprecated ub
driver");
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: linux-kernel@vger.kernel.org
Cc: bcm-kernel-feedback-list@broadcom.com
Cc: linux-mips@linux-mips.org
Cc: linux-arm-kernel@lists.infradead.org
Patchwork: https://patchwork.linux-mips.org/patch/16342/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Sort the entries in config MIPS alphabetically so as to make entries
easier to find.
Signed-off-by: Matt Redfearn <matt.redfearn@imgtec.com>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/16068/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Two entries being added at the same time to the IFLA
policy table, whilst parallel bug fixes to decnet
routing dst handling overlapping with the dst gc removal
in net-next.
Signed-off-by: David S. Miller <davem@davemloft.net>
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This adds the new getsockopt(2) option SO_PEERGROUPS on SOL_SOCKET to
retrieve the auxiliary groups of the remote peer. It is designed to
naturally extend SO_PEERCRED. That is, the underlying data is from the
same credentials. Regarding its syntax, it is based on SO_PEERSEC. That
is, if the provided buffer is too small, ERANGE is returned and @optlen
is updated. Otherwise, the information is copied, @optlen is set to the
actual size, and 0 is returned.
While SO_PEERCRED (and thus `struct ucred') already returns the primary
group, it lacks the auxiliary group vector. However, nearly all access
controls (including kernel side VFS and SYSVIPC, but also user-space
polkit, DBus, ...) consider the entire set of groups, rather than just
the primary group. But this is currently not possible with pure
SO_PEERCRED. Instead, user-space has to work around this and query the
system database for the auxiliary groups of a UID retrieved via
SO_PEERCRED.
Unfortunately, there is no race-free way to query the auxiliary groups
of the PID/UID retrieved via SO_PEERCRED. Hence, the current user-space
solution is to use getgrouplist(3p), which itself falls back to NSS and
whatever is configured in nsswitch.conf(3). This effectively checks
which groups we *would* assign to the user if it logged in *now*. On
normal systems it is as easy as reading /etc/group, but with NSS it can
resort to quering network databases (eg., LDAP), using IPC or network
communication.
Long story short: Whenever we want to use auxiliary groups for access
checks on IPC, we need further IPC to talk to the user/group databases,
rather than just relying on SO_PEERCRED and the incoming socket. This
is unfortunate, and might even result in dead-locks if the database
query uses the same IPC as the original request.
So far, those recursions / dead-locks have been avoided by using
primitive IPC for all crucial NSS modules. However, we want to avoid
re-inventing the wheel for each NSS module that might be involved in
user/group queries. Hence, we would preferably make DBus (and other IPC
that supports access-management based on groups) work without resorting
to the user/group database. This new SO_PEERGROUPS ioctl would allow us
to make dbus-daemon work without ever calling into NSS.
Cc: Michal Sekletar <msekleta@redhat.com>
Cc: Simon McVittie <simon.mcvittie@collabora.co.uk>
Reviewed-by: Tom Gundersen <teg@jklm.no>
Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Pick up dependent changes.
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This commit fixes a "maybe-uninitialized" build failure in
arch/mips/kvm/tlb.c when KVM, DYNAMIC_DEBUG and JUMP_LABEL are all
enabled. The failure is:
In file included from ./include/linux/printk.h:329:0,
from ./include/linux/kernel.h:13,
from ./include/asm-generic/bug.h:15,
from ./arch/mips/include/asm/bug.h:41,
from ./include/linux/bug.h:4,
from ./include/linux/thread_info.h:11,
from ./include/asm-generic/current.h:4,
from ./arch/mips/include/generated/asm/current.h:1,
from ./include/linux/sched.h:11,
from arch/mips/kvm/tlb.c:13:
arch/mips/kvm/tlb.c: In function ‘kvm_mips_host_tlb_inv’:
./include/linux/dynamic_debug.h:126:3: error: ‘idx_kernel’ may be used uninitialized in this function [-Werror=maybe-uninitialized]
__dynamic_pr_debug(&descriptor, pr_fmt(fmt), \
^~~~~~~~~~~~~~~~~~
arch/mips/kvm/tlb.c:169:16: note: ‘idx_kernel’ was declared here
int idx_user, idx_kernel;
^~~~~~~~~~
There is a similar error relating to "idx_user". Both errors were
observed with GCC 6.
As far as I can tell, it is impossible for either idx_user or idx_kernel
to be uninitialized when they are later read in the calls to kvm_debug,
but to satisfy the compiler, add zero initializers to both variables.
Signed-off-by: James Cowgill <James.Cowgill@imgtec.com>
Fixes: 57e3869cfaae ("KVM: MIPS/TLB: Generalise host TLB invalidate to kernel ASID")
Cc: <stable@vger.kernel.org> # 4.11+
Acked-by: James Hogan <james.hogan@imgtec.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
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Stack guard page is a useful feature to reduce a risk of stack smashing
into a different mapping. We have been using a single page gap which
is sufficient to prevent having stack adjacent to a different mapping.
But this seems to be insufficient in the light of the stack usage in
userspace. E.g. glibc uses as large as 64kB alloca() in many commonly
used functions. Others use constructs liks gid_t buffer[NGROUPS_MAX]
which is 256kB or stack strings with MAX_ARG_STRLEN.
This will become especially dangerous for suid binaries and the default
no limit for the stack size limit because those applications can be
tricked to consume a large portion of the stack and a single glibc call
could jump over the guard page. These attacks are not theoretical,
unfortunatelly.
Make those attacks less probable by increasing the stack guard gap
to 1MB (on systems with 4k pages; but make it depend on the page size
because systems with larger base pages might cap stack allocations in
the PAGE_SIZE units) which should cover larger alloca() and VLA stack
allocations. It is obviously not a full fix because the problem is
somehow inherent, but it should reduce attack space a lot.
One could argue that the gap size should be configurable from userspace,
but that can be done later when somebody finds that the new 1MB is wrong
for some special case applications. For now, add a kernel command line
option (stack_guard_gap) to specify the stack gap size (in page units).
Implementation wise, first delete all the old code for stack guard page:
because although we could get away with accounting one extra page in a
stack vma, accounting a larger gap can break userspace - case in point,
a program run with "ulimit -S -v 20000" failed when the 1MB gap was
counted for RLIMIT_AS; similar problems could come with RLIMIT_MLOCK
and strict non-overcommit mode.
Instead of keeping gap inside the stack vma, maintain the stack guard
gap as a gap between vmas: using vm_start_gap() in place of vm_start
(or vm_end_gap() in place of vm_end if VM_GROWSUP) in just those few
places which need to respect the gap - mainly arch_get_unmapped_area(),
and and the vma tree's subtree_gap support for that.
Original-patch-by: Oleg Nesterov <oleg@redhat.com>
Original-patch-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Hugh Dickins <hughd@google.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Tested-by: Helge Deller <deller@gmx.de> # parisc
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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The .its targets require information about the kernel binary, such as
its entry point, which is extracted from the vmlinux ELF. We therefore
require that the ELF is built before the .its files are generated.
Declare this requirement in the Makefile such that make will ensure this
is always the case, otherwise in corner cases we can hit issues as the
.its is generated with an incorrect (either invalid or stale) entry
point.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Fixes: cf2a5e0bb4c6 ("MIPS: Support generating Flattened Image Trees (.itb)")
Cc: linux-mips@linux-mips.org
Cc: stable <stable@vger.kernel.org> # v4.9+
Patchwork: https://patchwork.linux-mips.org/patch/16179/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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The code handling the pop76 opcode (ie. bnezc & jialc instructions) in
__compute_return_epc_for_insn() needs to set the value of $31 in the
jialc case, which is encoded with rs = 0. However its check to
differentiate bnezc (rs != 0) from jialc (rs = 0) was unfortunately
backwards, meaning that if we emulate a bnezc instruction we clobber $31
& if we emulate a jialc instruction it actually behaves like a jic
instruction.
Fix this by inverting the check of rs to match the way the instructions
are actually encoded.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Fixes: 28d6f93d201d ("MIPS: Emulate the new MIPS R6 BNEZC and JIALC instructions")
Cc: stable <stable@vger.kernel.org> # v4.0+
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/16178/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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The config option name is now renamed to 'TIMER_OF' for consistency with
the CLOCKSOURCE_OF_DECLARE => TIMER_OF_DECLARE change.
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
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The function name is now renamed to 'timer_probe' for consistency with
the CLOCKSOURCE_OF_DECLARE => TIMER_OF_DECLARE change.
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
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The CLOCKSOURCE_OF_DECLARE macro is used widely for the timers to declare the
clocksource at early stage. However, this macro is also used to initialize
the clockevent if any, or the clockevent only.
It was originally suggested to declare another macro to initialize a
clockevent, so in order to separate the two entities even they belong to the
same IP. This was not accepted because of the impact on the DT where splitting
a clocksource/clockevent definition does not make sense as it is a Linux
concept not a hardware description.
On the other side, the clocksource has not interrupt declared while the
clockevent has, so it is easy from the driver to know if the description is
for a clockevent or a clocksource, IOW it could be implemented at the driver
level.
So instead of dealing with a named clocksource macro, let's use a more generic
one: TIMER_OF_DECLARE.
The patch has not functional changes.
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Neil Armstrong <narmstrong@baylibre.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Matthias Brugger <matthias.bgg@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
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When opening the slave end of a PTY, it is not possible for userspace to
safely ensure that /dev/pts/$num is actually a slave (in cases where the
mount namespace in which devpts was mounted is controlled by an
untrusted process). In addition, there are several unresolvable
race conditions if userspace were to attempt to detect attacks through
stat(2) and other similar methods [in addition it is not clear how
userspace could detect attacks involving FUSE].
Resolve this by providing an interface for userpace to safely open the
"peer" end of a PTY file descriptor by using the dentry cached by
devpts. Since it is not possible to have an open master PTY without
having its slave exposed in /dev/pts this interface is safe. This
interface currently does not provide a way to get the master pty (since
it is not clear whether such an interface is safe or even useful).
Cc: Christian Brauner <christian.brauner@ubuntu.com>
Cc: Valentin Rothberg <vrothberg@suse.com>
Signed-off-by: Aleksa Sarai <asarai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The dev_attrs field has long been "depreciated" and is finally being
removed, so move the driver to use the "correct" dev_groups field
instead for struct bus_type.
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: <linux-mips@linux-mips.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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When ftrace is used with kprobes, it is possible for a kprobe to contain
an invalid location (ie. only initialised to 0 and not to a specific
location in the code). Trying to perform a cache flush on such location
leads to a crash r4k_flush_icache_range().
Fixes: c1bf207d6ee1 ("MIPS: kprobe: Add support.")
Signed-off-by: Marcin Nowakowski <marcin.nowakowski@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/16296/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Since introduction of tracing for init functions the in_kernel_space()
check is no longer correct, as it ignores the init sections. As a
result, when probes are inserted (and disabled) in the init functions,
a branch instruction is inserted instead of a nop, which is likely to
result in random crashes during boot.
Remove the MIPS-specific in_kernel_space() method and replace it with a
generic core_kernel_text() that also checks for init sections during
system boot stage.
Fixes: 42c269c88dc1 ("ftrace: Allow for function tracing to record init functions on boot up")
Signed-off-by: Marcin Nowakowski <marcin.nowakowski@imgtec.com>
Tested-by: Matt Redfearn <matt.redfearn@imgtec.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/16092/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Space reserved for PKMap should span from PKMAP_BASE to FIXADDR_START.
For large page sizes this is not the case as eg. for 64k pages the range
currently defined is from 0xfe000000 to 0x102000000(!!) which obviously
isn't right.
Remove the hardcoded location and set the BASE address as an offset from
FIXADDR_START.
Since all PKMAP ptes have to be placed in a contiguous memory, ensure
that this is the case by placing them all in a single page. This is
achieved by aligning the end address to pkmap pages count pages.
Signed-off-by: Marcin Nowakowski <marcin.nowakowski@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/15950/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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All PTEs used by PKMAP should be allocated in a contiguous memory area,
but we do not currently have a mechanism to enforce that, so ensure that
we don't try to allocate more entries than would fit in a single page.
Current fixed value of 1024 would not work with XPA enabled when
sizeof(pte_t)==8 and we need two pages to store pte tables.
Signed-off-by: Marcin Nowakowski <marcin.nowakowski@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/15949/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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fixrange_init operates at PMD-granularity and expects the addresses to
be PMD-size aligned, but currently that might not be the case for
PKMAP_BASE unless it is defined properly, so ensure a correct alignment
is used before passing the address to fixrange_init.
fixed mappings: only align the start address that is passed to
fixrange_init rather than the value before adding the size, as we may
end up with uninitialised upper part of the range.
Signed-off-by: Marcin Nowakowski <marcin.nowakowski@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/15948/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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All performance counters on I6400 (odd and even) are capable of counting
any of the available events, so drop current logic of using the extra
bit to determine which counter to use.
Signed-off-by: Marcin Nowakowski <marcin.nowakowski@imgtec.com>
Fixes: 4e88a8621301 ("MIPS: Add cases for CPU_I6400")
Fixes: fd716fca10fc ("MIPS: perf: Fix I6400 event numbers")
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/15991/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Just some simple overlapping changes in marvell PHY driver
and the DSA core code.
Signed-off-by: David S. Miller <davem@davemloft.net>
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A first step in vcpu->requests encapsulation. Additionally, we now
use READ_ONCE() when accessing vcpu->requests, which ensures we
always load vcpu->requests when it's accessed. This is important as
other threads can change it any time. Also, READ_ONCE() documents
that vcpu->requests is used with other threads, likely requiring
memory barriers, which it does.
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
[ Documented the new use of READ_ONCE() and converted another check
in arch/mips/kvm/vz.c ]
Signed-off-by: Andrew Jones <drjones@redhat.com>
Acked-by: Christoffer Dall <cdall@linaro.org>
Signed-off-by: Christoffer Dall <cdall@linaro.org>
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When CONFIG_ON=n, dummies are provided for of_clk_get() and
of_clk_get_by_name(), but not for of_clk_get_from_provider().
Provide a dummy for the latter, to improve the ability to do
compile-testing. This requires removing the existing dummy in the
Lantiq clock code.
Fixes: 766e6a4ec602d0c1 ("clk: add DT clock binding support")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Thomas Langer <thomas.langer@intel.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
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This fixes a regression in commit 4d6501dce079 where I didn't notice
that MIPS and OpenRISC were reinitialising p->{set,clear}_child_tid to
NULL after our initialisation in copy_process().
We can simply get rid of the arch-specific initialisation here since it
is now always done in copy_process() before hitting copy_thread{,_tls}().
Review notes:
- As far as I can tell, copy_process() is the only user of
copy_thread_tls(), which is the only caller of copy_thread() for
architectures that don't implement copy_thread_tls().
- After this patch, there is no arch-specific code touching
p->set_child_tid or p->clear_child_tid whatsoever.
- It may look like MIPS/OpenRISC wanted to always have these fields be
NULL, but that's not true, as copy_process() would unconditionally
set them again _after_ calling copy_thread_tls() before commit
4d6501dce079.
Fixes: 4d6501dce079c1eb6bf0b1d8f528a5e81770109e ("kthread: Fix use-after-free if kthread fork fails")
Reported-by: Guenter Roeck <linux@roeck-us.net>
Tested-by: Guenter Roeck <linux@roeck-us.net> # MIPS only
Acked-by: Stafford Horne <shorne@gmail.com>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Cc: Jonas Bonn <jonas@southpole.se>
Cc: Stefan Kristiansson <stefan.kristiansson@saunalahti.fi>
Cc: openrisc@lists.librecores.org
Cc: Jamie Iles <jamie.iles@oracle.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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alpha. m32r, mips and parisc define it, even though the syscall itself
is not wired.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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The conversion of the hotplug locking to a percpu rwsem unearthed lock
ordering issues all over the place.
The jump_label code has two issues:
1) Nested get_online_cpus() invocations
2) Ordering problems vs. the cpus rwsem and the jump_label_mutex
To cure these, the following lock order has been established;
cpus_rwsem -> jump_label_lock -> text_mutex
Even if not all architectures need protection against CPU hotplug, taking
cpus_rwsem before jump_label_lock is now mandatory in code pathes which
actually modify code and therefor need text_mutex protection.
Move the get_online_cpus() invocations into the core jump label code and
establish the proper lock order where required.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Ingo Molnar <mingo@kernel.org>
Acked-by: "David S. Miller" <davem@davemloft.net>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Chris Metcalf <cmetcalf@mellanox.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sebastian Siewior <bigeasy@linutronix.de>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Jason Baron <jbaron@akamai.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Link: http://lkml.kernel.org/r/20170524081549.025830817@linutronix.de
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include/linux/i2c is not for client devices. Move the header file to a
more appropriate location.
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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All the drivers for the various hardware elements of the jz4740 SoC have
been modified to use the pinctrl framework for their pin configuration
needs.
As such, this platform code is now unused and can be deleted.
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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We set the pin configuration for the jz4780-nand and jz4780-uart
drivers.
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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We set the pin configuration for the jz4740-nand, jz4740-mmc,
jz4740-fb, jz4740-pwm and jz4740-uart drivers.
This will permit those drivers to be cleaned out of the custom GPIO code
that they currently use.
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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For a description of the devicetree node, please read
Documentation/devicetree/bindings/pinctrl/ingenic,pinctrl.txt
For a description of the gpio devicetree nodes, please read
Documentation/devicetree/bindings/gpio/ingenic,gpio.txt
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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For a description of the pinctrl devicetree node, please read
Documentation/devicetree/bindings/pinctrl/ingenic,pinctrl.txt
For a description of the gpio devicetree nodes, please read
Documentation/devicetree/bindings/gpio/ingenic,gpio.txt
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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There is a pinctrl driver for each of the Ingenic SoCs supported by the
upstream Linux kernel. In order to switch away from the old GPIO
platform code, we now enable the pinctrl drivers by default for the
Ingenic SoCs.
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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A definition was only provided for asm-generic/socket.h
using platforms, define it for the others as well
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
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We use a directory under arch/$ARCH/boot/dts as an include path
that has links outside of the subtree to find dt-bindings from under
include/dt-bindings. That's been working well, but new DT architectures
haven't been adding them by default.
Recently there's been a desire to share some of the DT material between
arm and arm64, which originally caused developers to create symlinks or
relative includes between the subtrees. This isn't ideal -- it breaks
if the DT files aren't stored in the exact same hierarchy as the kernel
tree, and generally it's just icky.
As a somewhat cleaner solution we decided to add a $ARCH/ prefix link
once, and allow DTS files to reference dtsi (and dts) files in other
architectures that way.
Original approach was to create these links under each architecture,
but it lead to the problem of recursive symlinks.
As a remedy, move the include link directories out of the architecture
trees into a common location. At the same time, they can now share one
directory and one dt-bindings/ link as well.
Fixes: 4027494ae6e3 ('ARM: dts: add arm/arm64 include symlinks')
Reported-by: Russell King <linux@armlinux.org.uk>
Reported-by: Omar Sandoval <osandov@osandov.com>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Reviewed-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Rob Herring <robh@kernel.org>
Cc: Heiko Stuebner <heiko@sntech.de>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Mikael Starvik <starvik@axis.com>
Cc: Jesper Nilsson <jesper.nilsson@axis.com>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Frank Rowand <frowand.list@gmail.com>
Cc: linux-arch <linux-arch@vger.kernel.org>
Signed-off-by: Olof Johansson <olof@lixom.net>
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pci_add_resource_offset() is for host bridge windows where the bridge
translates CPU addresses to PCI bus addresses by adding an offset. To my
knowledge, no host bridge translates bus numbers, so this is only useful
for MEM and IO windows. In any event, host->busn_offset is never set to
anything other than zero, so pci_add_resource() is sufficient.
a2e50f53d535 ("MIPS: PCI: Add a hook for IORESOURCE_BUS in
pci_controller/bridge_controller") also added busn_resource itself. This
is currently unused but may be used by future SGI IP27 fixes, so I left it
there.
Tested-by: Joshua Kinard <kumba@gentoo.org> # SGI IP30 and IP27
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Joshua Kinard <kumba@gentoo.org>
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Remove unused PCI_BAR_COUNT definition.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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no callers, no consistent semantics, no sane way to use it...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Pull MIPS updates from James Hogan:
"math-emu:
- Add missing clearing of BLTZALL and BGEZALL emulation counters
- Fix BC1EQZ and BC1NEZ condition handling
- Fix BLEZL and BGTZL identification
BPF:
- Add JIT support for SKF_AD_HATYPE
- Use unsigned access for unsigned SKB fields
- Quit clobbering callee saved registers in JIT code
- Fix multiple problems in JIT skb access helpers
Loongson 3:
- Select MIPS_L1_CACHE_SHIFT_6
Octeon:
- Remove vestiges of CONFIG_CAVIUM_OCTEON_2ND_KERNEL
- Remove unused L2C types and macros.
- Remove unused SLI types and macros.
- Fix compile error when USB is not enabled.
- Octeon: Remove unused PCIERCX types and macros.
- Octeon: Clean up platform code.
SNI:
- Remove recursive include of cpu-feature-overrides.h
Sibyte:
- Export symbol periph_rev to sb1250-mac network driver.
- Fix Kconfig warning.
Generic platform:
- Enable Root FS on NFS in generic_defconfig
SMP-MT:
- Use CPU interrupt controller IPI IRQ domain support
UASM:
- Add support for LHU for uasm.
- Remove needless ISA abstraction
mm:
- Add 48-bit VA space and 4-level page tables for 4K pages.
PCI:
- Add controllers before the specified head
irqchip driver for MIPS CPU:
- Replace magic 0x100 with IE_SW0
- Prepare for non-legacy IRQ domains
- Introduce IPI IRQ domain support
MAINTAINERS:
- Update email-id of Rahul Bedarkar
NET:
- sb1250-mac: Add missing MODULE_LICENSE()
CPUFREQ:
- Loongson2: drop set_cpus_allowed_ptr()
Misc:
- Disable Werror when W= is set
- Opt into HAVE_COPY_THREAD_TLS
- Enable GENERIC_CPU_AUTOPROBE
- Use common outgoing-CPU-notification code
- Remove dead define of ST_OFF
- Remove CONFIG_ARCH_HAS_ILOG2_U{32,64}
- Stengthen IPI IRQ domain sanity check
- Remove confusing else statement in __do_page_fault()
- Don't unnecessarily include kmalloc.h into <asm/cache.h>.
- Delete unused definition of SMP_CACHE_SHIFT.
- Delete redundant definition of SMP_CACHE_BYTES"
* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (39 commits)
MIPS: Sibyte: Fix Kconfig warning.
MIPS: Sibyte: Export symbol periph_rev to sb1250-mac network driver.
NET: sb1250-mac: Add missing MODULE_LICENSE()
MAINTAINERS: Update email-id of Rahul Bedarkar
MIPS: Remove confusing else statement in __do_page_fault()
MIPS: Stengthen IPI IRQ domain sanity check
MIPS: smp-mt: Use CPU interrupt controller IPI IRQ domain support
irqchip: mips-cpu: Introduce IPI IRQ domain support
irqchip: mips-cpu: Prepare for non-legacy IRQ domains
irqchip: mips-cpu: Replace magic 0x100 with IE_SW0
MIPS: Remove CONFIG_ARCH_HAS_ILOG2_U{32,64}
MIPS: generic: Enable Root FS on NFS in generic_defconfig
MIPS: mach-rm: Remove recursive include of cpu-feature-overrides.h
MIPS: Opt into HAVE_COPY_THREAD_TLS
CPUFREQ: Loongson2: drop set_cpus_allowed_ptr()
MIPS: uasm: Remove needless ISA abstraction
MIPS: Remove dead define of ST_OFF
MIPS: Use common outgoing-CPU-notification code
MIPS: math-emu: Fix BC1EQZ and BC1NEZ condition handling
MIPS: r2-on-r6-emu: Clear BLTZALL and BGEZALL debugfs counters
...
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