The block number was not being compared right, it was off by one
when checking the response.
Some statistics wouldn't be incremented properly in some cases.
Check to see if that middle-part messages always have 31 bytes of
data.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Cc: stable@vger.kernel.org # 4.4
The altr_a10sr_gpio_direction_output should set proper output level
based on the value argument.
Fixes: 26a48c4cc2 ("gpio: altera-a10sr: Add A10 System Resource Chip GPIO support.")
Cc: <stable@vger.kernel.org>
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Tested by: Thor Thayer <thor.thayer@linux.intel.com>
Reviewed by: Thor Thayer <thor.thayer@linux.intel.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
When setting async EIC as IRQ_TYPE_EDGE_BOTH type, we missed to set the
SPRD_EIC_ASYNC_INTMODE register to 0, which means detecting edge signals.
Thus this patch fixes the issue.
Fixes: 25518e024e ("gpio: Add Spreadtrum EIC driver support")
Cc: <stable@vger.kernel.org>
Signed-off-by: Neo Hou <neo.hou@unisoc.com>
Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Since differnt type EICs have its own data register to read, thus fix the
incorrect data register.
Fixes: 25518e024e ("gpio: Add Spreadtrum EIC driver support")
Cc: <stable@vger.kernel.org>
Signed-off-by: Neo Hou <neo.hou@unisoc.com>
Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Nested interrupts run inside the calling thread's context and the top
half handler is never called which means that we never read the
timestamp.
This issue came up when trying to read line events from a gpiochip
using regmap_irq_chip for interrupts.
Fix it by reading the timestamp from the irq thread function if it's
still 0 by the time the second handler is called.
Fixes: d58f2bf261 ("gpio: Timestamp events in hardirq handler")
Cc: stable@vger.kernel.org
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
When multiple instances of pcf857x chips are present, a fix up
message [1] is printed during the probe of the 2nd and later
instances.
The issue is that the driver is using the same irq_chip data
structure between multiple instances.
Fix this by allocating the irq_chip data structure per instance.
[1] fix up message addressed by this patch
[ 1.212100] gpio gpiochip9: (pcf8575): detected irqchip that is shared with multiple gpiochips: please fix the driver.
Cc: Stable <stable@vger.kernel.org>
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
There is bunch of devices with multiple logical blocks which
can generate interrupts. It's not a rare case that the interrupt
reason registers are arranged so that there is own status/ack/mask
register for each logical block. In some devices there is also a
'main interrupt register(s)' which can indicate what sub blocks
have interrupts pending.
When such a device is connected via slow bus like i2c the main
part of interrupt handling latency can be caused by bus accesses.
On systems where it is expected that only one (or few) sub blocks
have active interrupts we can reduce the latency by only reading
the main register and those sub registers which have active
interrupts. Support this with regmap-irq for simple cases where
main register does not require acking or masking.
Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
The regulator_linear_range arrays and stpmic1_regulator_cfgs are only
accessed by this driver and the values are never changed so make them
static const. regulator_ops variables can also be const.
Also clean up a few empty lines in regulator_linear_range array.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
ROHM bd70528 is a ultra low power PMIC which includes
3 bucks, 3 LDOs and 2 LED drivers. Document the bindings
for them.
Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
BD70528MWV is an ultra-low Iq general purpose single-chip power
management IC for battery-powered portable devices.
Add support for controlling 3 bucks and 3 LDOs present in
ROHM BD70528.
Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
In pch_spi_handle_dma, it doesn't check for NULL returns of kcalloc
so it would result in an Oops.
Fixes: c37f3c2749 ("spi/topcliff_pch: DMA support")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Using the {0} construct as a generic initializer is perfectly fine in C,
however due to a bug in old gcc there is a warning:
+ /kisskb/src/drivers/vfio/pci/vfio_pci_nvlink2.c: warning: (near
initialization for 'cap.header') [-Wmissing-braces]: => 181:9
Since for whatever reason we still want to compile the modern kernel
with such an old gcc without warnings, this changes the capabilities
initialization.
The gcc bugzilla: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53119
Fixes: 7f92891778 ("vfio_pci: Add NVIDIA GV100GL [Tesla V100 SXM2] subdriver")
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
On in tree builds, subsequent builds will incorrectly include
the intermediate file 'processed-schema.yaml' with the input schema
files resulting in a build error. Update the find command to ignore
processed-schema.yaml.
Signed-off-by: Rob Herring <robh@kernel.org>
The mtk_iommu_add_device() function keeps the fwspec in an
on-stack pointer and calls mtk_iommu_create_mapping(), which
might change its source, dev->iommu_fwspec. This causes the
on-stack pointer to be obsoleted and the device
initialization to fail. Update the on-stack fwspec pointer
after mtk_iommu_create_mapping() has been called.
Reported-by: Frank Wunderlich <frank-w@public-files.de>
Fixes: a9bf2eec5a ('iommu/mediatek: Use helper functions to access dev->iommu_fwspec')
Tested-by: Frank Wunderlich <frank-w@public-files.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Spansion S25FL512S ID is erroneously using 5-byte JEDEC ID, while the chip
family ID is stored in the 6th byte. Due to using only 5-byte ID, it's also
covering S25FS512S and now that we have added 6-byte ID for that chip, we
can convert S25FL512S to using a proper 6-byte ID as well...
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Signed-off-by: Boris Brezillon <bbrezillon@kernel.org>
Spansion S25FS512S flash is currently misdetected as S25FL512S since the
latter uses 5-byte JEDEC ID, while the 6th ID byte (family ID) is different
on those chips. Add the 6-byte S25FS512S ID before S25FL512S ID in order
not to break the existing S25FS512S users.
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Signed-off-by: Boris Brezillon <bbrezillon@kernel.org>
system() is calling shell which should find the appropriate full path
via $PATH. On some systems, full path to iptables and/or nc might be
different that we one we have hardcoded.
Signed-off-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
When converting to autogenerated compat syscall wrappers all system
call entry points got a different symbol name: they all got a __s390x_
prefix.
This caused breakage with system call tracing, since an appropriate
arch_syscall_match_sym_name() was not provided. Add this function, and
while at it also add code to avoid compat system call tracing. s390
has different system call tables for native 64 bit system calls and
compat system calls. This isn't really supported in the common
code. However there are hardly any compat binaries left, therefore
just ignore compat system calls, like x86 and arm64 also do for the
same reason.
Fixes: aa0d6e70d3 ("s390: autogenerate compat syscall wrappers")
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
The function l2cap_get_conf_opt will return L2CAP_CONF_OPT_SIZE + opt->len
as length value. The opt->len however is in control over the remote user
and can be used by an attacker to gain access beyond the bounds of the
actual packet.
To prevent any potential leak of heap memory, it is enough to check that
the resulting len calculation after calling l2cap_get_conf_opt is not
below zero. A well formed packet will always return >= 0 here and will
end with the length value being zero after the last option has been
parsed. In case of malformed packets messing with the opt->len field the
length value will become negative. If that is the case, then just abort
and ignore the option.
In case an attacker uses a too short opt->len value, then garbage will
be parsed, but that is protected by the unknown option handling and also
the option parameter size checks.
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
We need to let users check their wrong ELF section name with proper
ELF section names when they fail to get a prog/attach type from it.
Because users can't realize libbpf guess prog/attach types from given
ELF section names. For example, when a 'cgroup' section name of a
BPF program is used, show available ELF section names(types).
Before:
$ bpftool prog load bpf-prog.o /sys/fs/bpf/prog1
Error: failed to guess program type based on ELF section name cgroup
After:
libbpf: failed to guess program type based on ELF section name 'cgroup'
libbpf: supported section(type) names are: socket kprobe/ kretprobe/ classifier action tracepoint/ raw_tracepoint/ xdp perf_event lwt_in lwt_out lwt_xmit lwt_seg6local cgroup_skb/ingress cgroup_skb/egress cgroup/skb cgroup/sock cgroup/post_bind4 cgroup/post_bind6 cgroup/dev sockops sk_skb/stream_parser sk_skb/stream_verdict sk_skb sk_msg lirc_mode2 flow_dissector cgroup/bind4 cgroup/bind6 cgroup/connect4 cgroup/connect6 cgroup/sendmsg4 cgroup/sendmsg6
Signed-off-by: Taeung Song <treeze.taeung@gmail.com>
Cc: Quentin Monnet <quentin.monnet@netronome.com>
Cc: Jakub Kicinski <jakub.kicinski@netronome.com>
Cc: Andrey Ignatov <rdna@fb.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
When sock recvbuff is set by bpf_setsockopt(), the value must by
limited by rmem_max. It is the same with sendbuff.
Fixes: 8c4b4c7e9f ("bpf: Add setsockopt helper function to bpf")
Signed-off-by: Yafang Shao <laoar.shao@gmail.com>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Acked-by: Lawrence Brakmo <brakmo@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
It's also a slave controller driver now, calling it "master" is slightly
misleading.
Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Mark Brown <broonie@kernel.org>
On a NOP double buffer update where current buffer address is the same
as the next buffer address, the SDW_UPDATE bit clears too late. As we
are now using this bit to determine when it is safe to signal flip
completion to userspace this will delay completion of atomic commits
where one plane doesn't change the buffer by a whole frame period.
Fix this by remembering the last buffer address and just skip the
double buffer update if it would not change the buffer address.
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
[p.zabel@pengutronix.de: initialize last_bufaddr in ipu_pre_configure]
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
When doing option parsing for standard type values of 1, 2 or 4 octets,
the value is converted directly into a variable instead of a pointer. To
avoid being tricked into being a pointer, check that for these option
types that sizes actually match. In L2CAP every option is fixed size and
thus it is prudent anyway to ensure that the remote side sends us the
right option size along with option paramters.
If the option size is not matching the option type, then that option is
silently ignored. It is a protocol violation and instead of trying to
give the remote attacker any further hints just pretend that option is
not present and proceed with the default values. Implementation
following the specification and its qualification procedures will always
use the correct size and thus not being impacted here.
To keep the code readable and consistent accross all options, a few
cosmetic changes were also required.
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Fix a static code checker warning:
drivers/spi/spi-bcm2835aux.c:460
bcm2835aux_spi_probe() warn: passing zero to 'PTR_ERR'
In case of error, the function devm_clk_get() returns ERR_PTR()
and not returns NULL.
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
The internal LVDS encoder now has DT bindings separate from the DU. Port
the device tree over to the new model.
Fixes: c6a27fa41f ("drm: rcar-du: Convert LVDS encoder code to bridge driver")
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
When updating a percpu map, bpftool currently copies the provided
value only into the first per CPU copy of the specified value,
all others instances are left zeroed.
This change explicitly copies the user-provided bytes to all the
per CPU instances, keeping the sub-command syntax unchanged.
v2 -> v3:
- drop unused argument, as per Quentin's suggestion
v1 -> v2:
- rename the helper as per Quentin's suggestion
Fixes: 71bb428fe2 ("tools: bpf: add bpftool")
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Lance reported an issue with bpftool not being able to
dump program if there are more programs loaded and you
want to dump any but the first program, like:
# bpftool prog
28: kprobe name trace_req_start tag 1dfc28ba8b3dd597 gpl
loaded_at 2019-01-18T17:02:40+1100 uid 0
xlated 112B jited 109B memlock 4096B map_ids 13
29: kprobe name trace_req_compl tag 5b6a5ecc6030a683 gpl
loaded_at 2019-01-18T17:02:40+1100 uid 0
xlated 928B jited 575B memlock 4096B map_ids 13,14
# bpftool prog dum jited tag 1dfc28ba8b3dd597
0: push %rbp
1: mov %rsp,%rbp
...
# bpftool prog dum jited tag 5b6a5ecc6030a683
Error: can't get prog info (29): Bad address
The problem is in the prog_fd_by_tag function not cleaning
the struct bpf_prog_info before another request, so the
previous program length is still in there and kernel assumes
it needs to dump the program, which fails because there's no
user pointer set.
Moving the struct bpf_prog_info declaration into the loop,
so it gets cleaned before each query.
Fixes: 71bb428fe2 ("tools: bpf: add bpftool")
Reported-by: Lance Digby <ldigby@redhat.com>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This patch added documentation for BTF (BPF Debug Format).
The document is placed under linux:Documentation/bpf directory.
Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Quentin Monnet says:
====================
Hi,
This set adds a new command to bpftool in order to dump a list of
eBPF-related parameters for the system (or for a specific network
device) to the console. Once again, this is based on a suggestion from
Daniel.
At this time, output includes:
- Availability of bpf() system call
- Availability of bpf() system call for unprivileged users
- JIT status (enabled or not, with or without debugging traces)
- JIT hardening status
- JIT kallsyms exports status
- Global memory limit for JIT compiler for unprivileged users
- Status of kernel compilation options related to BPF features
- Availability of known eBPF program types
- Availability of known eBPF map types
- Availability of known eBPF helper functions
There are three different ways to dump this information at this time:
- Plain output dumps probe results in plain text. It is the most
flexible options for providing descriptive output to the user, but
should not be relied upon for parsing the output.
- JSON output is supported.
- A third mode, available through the "macros" keyword appended to the
command line, dumps some of those parameters (not all) as a series of
"#define" directives, that can be included into a C header file for
example.
Probes for supported program and map types, and supported helpers, are
directly added to libbpf, so that other applications (or selftests) can
reuse them as necessary.
If the user does not have root privileges (or more precisely, the
CAP_SYS_ADMIN capability) detection will be erroneous for most
parameters. Therefore, forbid non-root users to run the command.
v5:
- Move exported symbols to a new LIBBPF_0.0.2 section in libbpf.map
(patches 4 to 6).
- Minor fixes on patches 3 and 4.
v4:
- Probe bpf_jit_limit parameter (patch 2).
- Probe some additional kernel config options (patch 3).
- Minor fixes on patch 6.
v3:
- Do not probe kernel version in bpftool (just retrieve it to probe support
for kprobes in libbpf).
- Change the way results for helper support is displayed: now one list of
compatible helpers for each program type (and C-style output gets a
HAVE_PROG_TYPE_HELPER(prog_type, helper) macro to help with tests. See
patches 6, 7.
- Address other comments from feedback from v2 (please refer to individual
patches' history).
v2 (please also refer to individual patches' history):
- Move probes for prog/map types, helpers, from bpftool to libbpf.
- Move C-style output as a separate patch, and restrict it to a subset of
collected information (bpf() availability, prog/map types, helpers).
- Now probe helpers with all supported program types, and display a list of
compatible program types (as supported on the system) for each helper.
- NOT addressed: grouping compilation options for kernel into subsections
(patch 3) (I don't see an easy way of grouping them at the moment, please
see also the discussion on v1 thread).
====================
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Add the bash completion related to the newly introduced "bpftool feature
probe" command.
Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
bpftool gained support for probing the current system in order to see
what program and map types, and what helpers are available on that
system. This patch adds the possibility to pass an interface index to
libbpf (and hence to the kernel) when trying to load the programs or to
create the maps, in order to see what items a given network device can
support.
A new keyword "dev <ifname>" can be used as an alternative to "kernel"
to indicate that the given device should be tested. If no target ("dev"
or "kernel") is specified bpftool defaults to probing the kernel.
Sample output:
# bpftool -p feature probe dev lo
{
"syscall_config": {
"have_bpf_syscall": true
},
"program_types": {
"have_sched_cls_prog_type": false,
"have_xdp_prog_type": false
},
...
}
As the target is a network device, /proc/ parameters and kernel
configuration are NOT dumped. Availability of the bpf() syscall is
still probed, so we can return early if that syscall is not usable
(since there is no point in attempting the remaining probes in this
case).
Among the program types, only the ones that can be offloaded are probed.
All map types are probed, as there is no specific rule telling which one
could or could not be supported by a device in the future. All helpers
are probed (but only for offload-able program types).
Caveat: as bpftool does not attempt to attach programs to the device at
the moment, probes do not entirely reflect what the device accepts:
typically, for Netronome's nfp, results will announce that TC cls
offload is available even if support has been deactivated (with e.g.
ethtool -K eth1 hw-tc-offload off).
v2:
- All helpers are probed, whereas previous version would only probe the
ones compatible with an offload-able program type. This is because we
do not keep a default compatible program type for each helper anymore.
Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Make bpftool able to dump a subset of the parameters collected by
probing the system as a listing of C-style #define macros, so that
external projects can reuse the result of this probing and build
BPF-based project in accordance with the features available on the
system.
The new "macros" keyword is used to select this output. An additional
"prefix" keyword is added so that users can select a custom prefix for
macro names, in order to avoid any namespace conflict.
Sample output:
# bpftool feature probe kernel macros prefix FOO_
/*** System call availability ***/
#define FOO_HAVE_BPF_SYSCALL
/*** eBPF program types ***/
#define FOO_HAVE_SOCKET_FILTER_PROG_TYPE
#define FOO_HAVE_KPROBE_PROG_TYPE
#define FOO_HAVE_SCHED_CLS_PROG_TYPE
...
/*** eBPF map types ***/
#define FOO_HAVE_HASH_MAP_TYPE
#define FOO_HAVE_ARRAY_MAP_TYPE
#define FOO_HAVE_PROG_ARRAY_MAP_TYPE
...
/*** eBPF helper functions ***/
/*
* Use FOO_HAVE_PROG_TYPE_HELPER(prog_type_name, helper_name)
* to determine if <helper_name> is available for <prog_type_name>,
* e.g.
* #if FOO_HAVE_PROG_TYPE_HELPER(xdp, bpf_redirect)
* // do stuff with this helper
* #elif
* // use a workaround
* #endif
*/
#define FOO_HAVE_PROG_TYPE_HELPER(prog_type, helper) \
FOO_BPF__PROG_TYPE_ ## prog_type ## __HELPER_ ## helper
...
#define FOO_BPF__PROG_TYPE_socket_filter__HELPER_bpf_probe_read 0
#define FOO_BPF__PROG_TYPE_socket_filter__HELPER_bpf_ktime_get_ns 1
#define FOO_BPF__PROG_TYPE_socket_filter__HELPER_bpf_trace_printk 1
...
v3:
- Change output for helpers again: add a
HAVE_PROG_TYPE_HELPER(type, helper) macro that can be used to tell
if <helper> is available for program <type>.
v2:
- #define-based output added as a distinct patch.
- "HAVE_" prefix appended to macro names.
- Output limited to bpf() syscall availability, BPF prog and map types,
helper functions. In this version kernel config options, procfs
parameter or kernel version are intentionally left aside.
- Following the change on helper probes, format for helper probes in
this output style has changed (now a list of compatible program
types).
Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Similarly to what was done for program types and map types, add a set of
probes to test the availability of the different eBPF helper functions
on the current system.
For each known program type, all known helpers are tested, in order to
establish a compatibility matrix. Output is provided as a set of lists
of available helpers, one per program type.
Sample output:
# bpftool feature probe kernel
...
Scanning eBPF helper functions...
eBPF helpers supported for program type socket_filter:
- bpf_map_lookup_elem
- bpf_map_update_elem
- bpf_map_delete_elem
...
eBPF helpers supported for program type kprobe:
- bpf_map_lookup_elem
- bpf_map_update_elem
- bpf_map_delete_elem
...
# bpftool --json --pretty feature probe kernel
{
...
"helpers": {
"socket_filter_available_helpers": ["bpf_map_lookup_elem", \
"bpf_map_update_elem","bpf_map_delete_elem", ...
],
"kprobe_available_helpers": ["bpf_map_lookup_elem", \
"bpf_map_update_elem","bpf_map_delete_elem", ...
],
...
}
}
v5:
- In libbpf.map, move global symbol to the new LIBBPF_0.0.2 section.
v4:
- Use "enum bpf_func_id" instead of "__u32" in bpf_probe_helper()
declaration for the type of the argument used to pass the id of
the helper to probe.
- Undef BPF_HELPER_MAKE_ENTRY after using it.
v3:
- Do not pass kernel version from bpftool to libbpf probes (kernel
version for testing program with kprobes is retrieved directly from
libbpf).
- Dump one list of available helpers per program type (instead of one
list of compatible program types per helper).
v2:
- Move probes from bpftool to libbpf.
- Test all program types for each helper, print a list of working prog
types for each helper.
- Fall back on include/uapi/linux/bpf.h for names and ids of helpers.
- Remove C-style macros output from this patch.
Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Add new probes for eBPF map types, to detect what are the ones available
on the system. Try creating one map of each type, and see if the kernel
complains.
Sample output:
# bpftool feature probe kernel
...
Scanning eBPF map types...
eBPF map_type hash is available
eBPF map_type array is available
eBPF map_type prog_array is available
...
# bpftool --json --pretty feature probe kernel
{
...
"map_types": {
"have_hash_map_type": true,
"have_array_map_type": true,
"have_prog_array_map_type": true,
...
}
}
v5:
- In libbpf.map, move global symbol to the new LIBBPF_0.0.2 section.
v3:
- Use a switch with all enum values for setting specific map parameters,
so that gcc complains at compile time (-Wswitch-enum) if new map types
were added to the kernel but libbpf was not updated.
v2:
- Move probes from bpftool to libbpf.
- Remove C-style macros output from this patch.
Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Introduce probes for supported BPF program types in libbpf, and call it
from bpftool to test what types are available on the system. The probe
simply consists in loading a very basic program of that type and see if
the verifier complains or not.
Sample output:
# bpftool feature probe kernel
...
Scanning eBPF program types...
eBPF program_type socket_filter is available
eBPF program_type kprobe is available
eBPF program_type sched_cls is available
...
# bpftool --json --pretty feature probe kernel
{
...
"program_types": {
"have_socket_filter_prog_type": true,
"have_kprobe_prog_type": true,
"have_sched_cls_prog_type": true,
...
}
}
v5:
- In libbpf.map, move global symbol to a new LIBBPF_0.0.2 section.
- Rename (non-API function) prog_load() as probe_load().
v3:
- Get kernel version for checking kprobes availability from libbpf
instead of from bpftool. Do not pass kernel_version as an argument
when calling libbpf probes.
- Use a switch with all enum values for setting specific program
parameters just before probing, so that gcc complains at compile time
(-Wswitch-enum) if new prog types were added to the kernel but libbpf
was not updated.
- Add a comment in libbpf.h about setrlimit() usage to allow many
consecutive probe attempts.
v2:
- Move probes from bpftool to libbpf.
- Remove C-style macros output from this patch.
Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Add probes to dump a number of options set (or not set) for compiling
the kernel image. These parameters provide information about what BPF
components should be available on the system. A number of them are not
directly related to eBPF, but are in fact used in the kernel as
conditions on which to compile, or not to compile, some of the eBPF
helper functions.
Sample output:
# bpftool feature probe kernel
Scanning system configuration...
...
CONFIG_BPF is set to y
CONFIG_BPF_SYSCALL is set to y
CONFIG_HAVE_EBPF_JIT is set to y
...
# bpftool --pretty --json feature probe kernel
{
"system_config": {
...
"CONFIG_BPF": "y",
"CONFIG_BPF_SYSCALL": "y",
"CONFIG_HAVE_EBPF_JIT": "y",
...
}
}
v5:
- Declare options[] array in probe_kernel_image_config() as static.
v4:
- Add some options to the list:
- CONFIG_TRACING
- CONFIG_KPROBE_EVENTS
- CONFIG_UPROBE_EVENTS
- CONFIG_FTRACE_SYSCALLS
- Add comments about those options in the source code.
v3:
- Add a comment about /proc/config.gz not being supported as a path for
the config file at this time.
- Use p_info() instead of p_err() on failure to get options from config
file, as bpftool keeps probing other parameters and that would
possibly create duplicate "error" entries for JSON.
v2:
- Remove C-style macros output from this patch.
- NOT addressed: grouping of those config options into subsections
(I don't see an easy way of grouping them at the moment, please see
also the discussion on v1 thread).
Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Add a set of probes to dump the eBPF-related parameters available from
/proc/: availability of bpf() syscall for unprivileged users,
JIT compiler status and hardening status, kallsyms exports status.
Sample output:
# bpftool feature probe kernel
Scanning system configuration...
bpf() syscall for unprivileged users is enabled
JIT compiler is disabled
JIT compiler hardening is disabled
JIT compiler kallsyms exports are disabled
Global memory limit for JIT compiler for unprivileged users \
is 264241152 bytes
...
# bpftool --json --pretty feature probe kernel
{
"system_config": {
"unprivileged_bpf_disabled": 0,
"bpf_jit_enable": 0,
"bpf_jit_harden": 0,
"bpf_jit_kallsyms": 0,
"bpf_jit_limit": 264241152
},
...
}
These probes are skipped if procfs is not mounted.
v4:
- Add bpf_jit_limit parameter.
v2:
- Remove C-style macros output from this patch.
Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Add a new component and command for bpftool, in order to probe the
system to dump a set of eBPF-related parameters so that users can know
what features are available on the system.
Parameters are dumped in plain or JSON output (with -j/-p options).
The current patch introduces probing of one simple parameter:
availability of the bpf() system call. Later commits
will add other probes.
Sample output:
# bpftool feature probe kernel
Scanning system call availability...
bpf() syscall is available
# bpftool --json --pretty feature probe kernel
{
"syscall_config": {
"have_bpf_syscall": true
}
}
The optional "kernel" keyword enforces probing of the current system,
which is the only possible behaviour at this stage. It can be safely
omitted.
The feature comes with the relevant man page, but bash completion will
come in a dedicated commit.
v3:
- Do not probe kernel version. Contrarily to what is written below for
v2, we can have the kernel version retrieved in libbpf instead of
bpftool (in the patch adding probing for program types).
v2:
- Remove C-style macros output from this patch.
- Even though kernel version is no longer needed for testing kprobes
availability, note that we still collect it in this patch so that
bpftool gets able to probe (in next patches) older kernels as well.
Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
GVT-g will shadow the privilege batch buffer and the indirect context
during command scan, move the release process into
intel_vgpu_destroy_workload() to ensure the resources are recycled
properly.
Fixes: 0cce2823ed ("drm/i915/gvt/kvmgt:Refine error handling for prepare_execlist_workload")
Reviewed-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Weinan Li <weinan.z.li@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Recently, there were bunch of fixes to bnx2x driver, the code is now
aligned to out-of-box driver version 1.713.36. This patch updates
bnx2x driver version to 1.713.36.
Signed-off-by: Sudarsana Reddy Kalluru <Sudarsana.Kalluru@cavium.com>
Signed-off-by: Michal Kalderon <Michal.Kalderon@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
When building this code on a 32-bit platform such as ARM, there is a
link time error (lld error shown, happpens with ld.bfd too):
ld.lld: error: undefined symbol: __aeabi_uldivmod
>>> referenced by devlink.c
>>> net/core/devlink.o:(devlink_health_buffers_create) in archive built-in.a
This happens when using a regular division symbol with a u64 dividend.
Use DIV_ROUND_UP_ULL, which wraps do_div, to avoid this situation.
Fixes: cb5ccfbe73 ("devlink: Add health buffer support")
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Some of the PHY and MDIO drivers refer to the COPYING file in the main
directory of this archive. This is the main license for Linux, thus
GPLv2 plus syscall extension.
Fixup the MODULE_LICENSE() where needed and add an SDPX header for
GPLv2.
Cc: David Daney <david.daney@cavium.com>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
A few PHY drivers have the GPLv2 license text. They then either have
a MODULE_LICENSE() of GPLv2+, or an SPDX tag of GPLv2+.
Since the license text is much easier to understand than either the
SPDX tag or the MODULE_LICENSE, use it as the definitive source of the
licence, and fixup with others when there are contradictions.
Cc: Russell King <rmk+kernel@armlinux.org.uk>
Cc: Jonas Jensen <jonas.jensen@gmail.com>
Cc: Laurent Pinchart <laurentp@cse-semaphore.com>
Cc: Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
Cc: Scott Wood <scottwood@freescale.com>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Andrew F. Davis <afd@ti.com>
Acked-by: Dan Murphy <dmurphy@ti.com>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
A few PHY drivers have the GPLv2+ license text. They then either have
a MODULE_LICENSE() of GPLv2 only, or an SPDX tag of GPLv2 only.
Since the license text is much easier to understand than either the
SPDX tag or the MODULE_LICENSE, use it as the definitive source of the
licence, and fixup the others when there are contradictions.
Cc: David Wu <david.wu@rock-chips.com>
Cc: Dongpo Li <lidongpo@hisilicon.com>
Cc: Michael Schmitz <schmitzmic@gmail.com>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Michael Schmitz <schmitzmic@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Andrew Lunn says:
====================
SPDX tags for PHY and MDIO drivers
This patchset adds SPDX tags to files where the license information is
clear and consistent. It also removes redundent license text when an
SPDX header is present.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
The SPDX header makes any license text redundent. Remove it.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Where the license text and the MODULE_LICENSE() value agree, convert
to using an SPDX header, removing the license text.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
According to the device tree binding the phy-supply property is
optional. Use the regulator_get_optional API accordingly. The
code already handles NULL just fine.
This gets rid of the following warning:
fec 2188000.ethernet: 2188000.ethernet supply phy not found, using dummy regulator
Signed-off-by: Stefan Agner <stefan@agner.ch>
Reviewed-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Acked-by: Fugang Duan <fugang.duan@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
