Hi all,
Please do not add any v4.3 related material to your linux-next included
branches until after v4.2-rc1 is released.
Changes since 20150630:
I fixed a supplied patch to the akpm tree.
Non-merge commits (relative to Linus' tree): 1860
1686 files changed, 98175 insertions(+), 25316
On 01-07-15 04:19, Bean Huo 霍斌斌 (beanhuo) wrote:
>> drivers/mtd/spi-nor/spi-nor.c | 2 ++
>> 1 file changed, 2 insertions(+)
>
>> diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c
>> index e8f6131..10ba94f 100644
>> --- a/drivers/mtd/spi-nor/spi-nor.c
>> +++
On Wed, Jul 01, 2015 at 02:57:30AM +, He Kuang wrote:
> This patch adds an extra perf trace buffer for other utilities like
> bpf to fill extra data to perf events.
What!, why?
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On Tue, Jun 30, 2015 at 10:34:25PM -0500, Jeremy White wrote:
> >
> >It's pointless to post a patch that you know has problems with it (i.e.
> >it's not even in proper kernel coding style), as it will never be
> >reviewed or even looked at.
>
> Thanks for the reply, and I'm sorry for the clumsy
On 30-06-15 17:42, Graham Moore wrote:
On 06/30/2015 06:17 AM, Mike Looijmans wrote:
Micron QUAD mode expects command, address and data on 4 lanes instead of just
one for command (extended SPI mode). This requires the controller to be in a
special mode, so check first if the controller could
On Tue, 2015-06-30 at 16:30 +0200, Rabin Vincent wrote:
> Hi,
>
> We're seeing a livelock where two CPUs both loop with interrupts
> disabled in pick_next_task_fair() / idle_balance() and continuously
> fetch all tasks from each other...
Hm. Does the below help? Looks to me like we are
On Wed, Jul 01, 2015 at 12:06:02PM +0800, Daniel Kurtz wrote:
> Hi Leilk,
>
> Please see comments inline...
>
> On Mon, Jun 29, 2015 at 9:04 PM, Leilk Liu wrote:
> > This patch adds basic spi bus for MT8173.
> >
> > Signed-off-by: Leilk Liu
> > Signed-off-by: Eddie Huang
> > ---
> >
On 07/01/2015 04:57 AM, Arnaldo Carvalho de Melo wrote:
Em Wed, Jul 01, 2015 at 12:18:45AM +0900, Taeung Song escreveu:
When an error occur a error value is just returned
without freeing the session. So allocating and freeing
session have to be matched as a pair even if an error occur.
Address:
7, Unit, 4A Ford Street,
Stockport, Cheshire SK3 0BT,
United Kingdom.
Company Registration No: 6296225
Financial Services Authority Reg NO: 602506
God dag herr / fru
Vi håper at vi møttes i en sunn tilstand?
Vi er Storbritannia basert lån utlåner, kan vi tilby lån for business
/
Lockdep validator complains about recursive locking and deadlock
when two different regmap instances are called in a nested order.
That happens anytime a regmap read/write call needs to access
another regmap.
This is because, for performance reason, lockdep groups all locks
initialized by the
Signed-off-by: Bjorn Andersson
---
This is needed to get our regulators into hpm, to give enough power to our
sdhci cards to run at higher clockrates - e.g. hs200.
Documentation/devicetree/bindings/mmc/mmc.txt | 2 ++
drivers/mmc/core/core.c | 6 ++
On 06/30/2015 04:02 PM, H. Peter Anvin wrote:
On 06/30/2015 02:55 PM, Andy Lutomirski wrote:
On Tue, Jun 30, 2015 at 2:52 PM, H. Peter Anvin wrote:
On 06/30/2015 02:48 PM, Andy Lutomirski wrote:
On Tue, Jun 30, 2015 at 2:41 PM, H. Peter Anvin wrote:
On 06/30/2015 02:37 PM, Jakub Jelinek
In __bitmap_parselist we can accept whitespaces on head or tail
during every parsing procedure.
If input has valid ranges, there is no reason to reject the user.
fixes are:
1) if input ends with ',', bit 0 might be set unexpectedly.
now we check if any digit is available after every loop.
2) if
Sorry for the mistake I made when cherry-picking the patch. Fix and resend
again.
__cpufreq_cooling_register() might fail if some CPU other than first one in
clip_cpu mask is present earlier e.g. CPU hotplug. Iterate all CPUs in the mask
to handle this case.
Signed-off-by: Pi-Cheng Chen
---
This patch removes the deprecated notifier API of extcon framwork
and then use the new extcon API with the unique id to indicate
the each external connector (USB, USB-HOST).
Alter deprecated API as following:
- extcon_register_interest() -> extcon_register_notifier()
-
This patch removes the deprecated API of extcon and then use the new extcon API
with the unique id to indicate the each external connector (USB-HOST).
- extcon_get_cable_state(*edev, char *) -> extcon_get_cable_state_(*edev, id)
Cc: Greg Kroah-Hartman
Cc: Felipe Balbi
Cc: Yoshihiro Shimoda
Cc:
This patch uses the devm_extcon_dev_[allocate|register]() to manage the
resource automatically and replace deprecated API as following:
- extcon_[set|get]_cable_state(*edev, char *) ->
extcon_[set|get]_cable_state_(*edev, id)
Cc: Felipe Balbi
Cc: Greg Kroah-Hartman
Signed-off-by: Chanwoo Choi
This patch removes the deprecated notifier API of extcon framwork
and then use the new extcon API with the unique id to indicate
the each external connector (USB, USB-HOST).
Alter deprecated API as following:
- extcon_register_interest() -> extcon_register_notifier()
-
This patch removes the deprecated notifier API of extcon framwork
and then use the new extcon API with the unique id to indicate
the each external connector (USB, USB-HOST).
Alter deprecated API as following:
- extcon_register_interest() -> extcon_register_notifier()
-
This patch removes the deprecated API of extcon framwork
and then use the new extcon API with the unique id to indicate
the each external connector.
Th deprecated API with cable name as following:
- int extcon_register_interest(struct extcon_specific_cable_nb *obj,
__cpufreq_cooling_register() might fail if some CPU other than first one in
clip_cpu mask is present earlier e.g. CPU hotplug. Iterate all CPUs in the mask
to handle this case.
Signed-off-by: Pi-Cheng Chen
---
drivers/thermal/cpu_cooling.c | 8 +++-
1 file changed, 7 insertions(+), 1
Hi Leilk,
Please see comments inline...
On Mon, Jun 29, 2015 at 9:04 PM, Leilk Liu wrote:
> This patch adds basic spi bus for MT8173.
>
> Signed-off-by: Leilk Liu
> Signed-off-by: Eddie Huang
> ---
> drivers/spi/Kconfig | 9 +
> drivers/spi/Makefile | 1 +
>
2015-07-01 11:48 GMT+09:00 SungEun Kim :
> From: "cleaeye.kim"
>
> The synchronous synchronize_rcu in wakeup_source_remove makes user process
> which writes to /sys/kernel/wake_unlock blocked sometimes.
>
> For example, when android eventhub tries to release wakelock,
> this blocking process can
1) mlx4 driver bug fixes (TX queue wakeups, csum complete indications)
from Ido Shamay, Eran Ben Elisha, and Or Gerlitz.
2) Missing unlock in error path of PTP support in renesas driver, from
Dan Carpenter.
3) Add Vitesse 8641 phy IDs to vitesse PHY driver, from Shaohui Xie.
4) Bnx2x
2015-07-01 11:48 GMT+09:00 SungEun Kim :
> From: "cleaeye.kim"
>
> The synchronous synchronize_rcu in wakeup_source_remove makes user process
> which writes to /sys/kernel/wake_unlock blocked sometimes.
>
> For example, when android eventhub tries to release wakelock,
> this blocking process can
On Tue, Jun 30, 2015 at 05:42:14PM -0700, Josh Triplett wrote:
> On Tue, Jun 30, 2015 at 05:15:58PM -0700, Paul E. McKenney wrote:
> > On Tue, Jun 30, 2015 at 04:46:33PM -0700, j...@joshtriplett.org wrote:
> > > On Tue, Jun 30, 2015 at 03:12:24PM -0700, Paul E. McKenney wrote:
> > > > On Tue, Jun
It's pointless to post a patch that you know has problems with it (i.e.
it's not even in proper kernel coding style), as it will never be
reviewed or even looked at.
Thanks for the reply, and I'm sorry for the clumsy ask.
I would still appreciate feedback on two points:
1. Is the basic
Hi Constantine,
On 06/29/2015 04:05 PM, Constantine Shulyupin wrote:
From: const
Sensor type:
3 diode (current mode), MD=1
4 thermistor, MD=2
Reference:
Nuvoton Hardware Monitoring IC NCT7802Y
7.2.32 Mode Selection Register
Location : Index 22h
Signed-off-by: Constantine Shulyupin
---
hi, all
after a deep think, allocing a new buf is ugly.
new patch "lib/bitmap.c: fix some parsing issues and code style" is sent out.
any comments is welcome. :)
thanks
xinhui
On 2015年06月30日 18:02, Pan Xinhui wrote:
add __bitmap_parse_common to match any contents and return expected
In __bitmap_parselist we can accept whitespaces on head or tail
during every parsing procedure.
If input has valid ranges, there is no reason to reject the user.
fixes:
1) if input ends with ',', bit 0 might be set unexpectedly.
now we check if any digit is available after every loop.
2) if
When parsing SRAT, all memory ranges are added into numa_meminfo.
In numa_init(), before entering numa_cleanup_meminfo(), all possible
memory ranges are in numa_meminfo. And numa_cleanup_meminfo() removes
all ranges over max_pfn or empty.
But, this only works if the nodes are continuous. Let's
On 06/30/2015 08:21 AM, Marcus Granado wrote:
On 13/05/15 11:29, Bob Liu wrote:
On 04/28/2015 03:46 PM, Arianna Avanzini wrote:
Hello Christoph,
Il 28/04/2015 09:36, Christoph Hellwig ha scritto:
What happened to this patchset?
It was passed on to Bob Liu, who published a follow-up
On 6/26/15 8:25 AM, Xi Wang wrote:
Currently "ALU_END_FROM_BE 32" and "ALU_END_FROM_LE 32" do not test if
the upper bits of the result are zeros (the arm64 JIT had such bugs).
Extend the two tests to catch this.
Cc: Alexei Starovoitov
Signed-off-by: Xi Wang
looks good. Please resubmit when
Inside perf_trace_buf_prepare(), a recursion count is increased, the
count was first introduced by commit 444a2a3bcd6d ("tracing,
perf_events: Protect the buffer from recursion in perf") to protect
the percpu data buffer from being overwritten.
For future patch to enable eBPF saving data into
Collect extra trace buffer data in the stage of preparing perf trace
buffer. If extra perf trace buffer is valid, set invalid flag, extend
the trace buffer size and append the data of extra buffer to perf
trace buffer, so the combined data will be compatible to the orignal
format and can be
The idea to let eBPF output data to perf sample event was first
metioned in "[RFC PATCH v4 10/29] bpf tools: Collect map definitions
from 'maps' section", and the output data is not limited to PMU
counters but data like time latencies, cache misses or other things
users want to record.
This patch
When we add a kprobe point and record events by perf, the execution path
of all threads on each cpu will enter this point, but perf may only
record events on a particular thread or cpu at this kprobe point, a
check on call->perf_events list filters out the threads which perf is
not recording.
Add function to receive data from eBPF programs and fill that into
perf extra trace buffer of the current context. In previous patch we
make sure that the recursion flag protecting perf trace buffer is
checked when bpf_prog is executed, so here we can safely fill the
trace buffer.
In order to get
Introduce another trace buffer besides perf_trace_buffer, so other
utilities like bpf can generate and fill perf event data to it
extraly and the data can be collected to the original buffer
afterwards. The life cycle of this extra buffer is the same as the
original one.
Signed-off-by: He Kuang
On Mon, 29 Jun 2015, Jerome Glisse wrote:
> [...]
>
> Iterator is what protect against concurrent freeing of the directory so it
> has to return to caller on directory boundary (for 64bits arch with 64bits
> pte it has return every 512 entries). Otherwise pt_iter_fini() would have
> to walk
From: "cleaeye.kim"
The synchronous synchronize_rcu in wakeup_source_remove makes user process
which writes to /sys/kernel/wake_unlock blocked sometimes.
For example, when android eventhub tries to release wakelock,
this blocking process can occur, and eventhub can't get input event
for a
On 2015/7/1 5:15, Al Stone wrote:
> On 06/30/2015 02:12 PM, Rafael J. Wysocki wrote:
>> Hi Al,
>>
>> On Fri, Jun 19, 2015 at 12:36 AM, Al Stone wrote:
>>> Add the ACPI_SPEC_VERSION() macro to build a proper version number from
>>> a major and minor revision number. Add also the
To help user find correct kernel include options, this patch extracts
them from kbuild system by an embedded script kinc_fetch_script, which
creates a temporary directory, generates Makefile and an empty dummy.o
then use the Makefile to fetch $(NOSTDINC_FLAGS), $(LINUXINCLUDE) and
$(EXTRA_CFLAGS)
By adding libbpf into perf's Makefile, this patch enables perf to
build libbpf during building if libelf is found and neither NO_LIBELF
nor NO_LIBBPF is set. The newly introduced code is similar to libapi
and libtraceevent building in Makefile.perf.
MANIFEST is also updated for 'make
This patch utilizes previous introduced bpf_load_program to load
programs in the ELF file into kernel. Result is stored in 'fd' field
in 'struct bpf_program'.
During loading, it allocs a log buffer and free it before return.
Note that that buffer is not passed to bpf_load_program() if the first
Previous patch introduces llvm__compile_bpf() to compile source file to
eBPF object. This patch adds testcase to test it. It also test libbpf
by opening generated object.
Signed-off-by: Wang Nan
---
tools/perf/tests/Build | 1 +
tools/perf/tests/builtin-test.c | 4 ++
Commit 7b6ff0bdbf4f7f429c2116cca92a6d171217449e ("perf probe ppc64le:
Fixup function entry if using kallsyms lookup") adds 'struct map' into
probe-event.h but not include "util/map.h" in it. This patch fixes it.
Signed-off-by: Wang Nan
---
tools/perf/util/probe-event.h | 1 +
1 file changed, 1
By introducing new rules in tools/perf/util/parse-events.[ly], this
patch enables 'perf record --event bpf_file.o' to select events by
an eBPF object file. It calls parse_events_load_bpf() to load that
file, which uses bpf__prepare_load() and finally calls
bpf_object__open() for the object files.
Although previous patch allows setting BPF compiler related options in
perfconfig, on some ad-hoc situation it still requires passing options
through cmdline. This patch introduces 2 options to 'perf record' for
this propose: --clang-path and --clang-opt.
Signed-off-by: Wang Nan
---
In this patch, caller of libbpf is able to control the loaded programs
by installing a preprocessor callback for a BPF program. With
preprocessor, different instances can be created from one BPF program.
This patch will be used by perf to generate different prologue for
different 'struct
This patch suppress message output by add_perf_probe_events() and
del_perf_probe_events() if they are triggered by BPF loading. Before
this patch, when using 'perf record' with BPF object/source as event
selector, following message will be output:
Added new event:
This patch utilizes bpf_load_object() provided by libbpf to load all
objects into kernel.
Signed-off-by: Wang Nan
---
tools/perf/builtin-record.c | 12
tools/perf/util/bpf-loader.c | 19 +++
tools/perf/util/bpf-loader.h | 2 ++
3 files changed, 33 insertions(+)
This patch parses section name of each program, and creates
corresponding 'struct perf_probe_event' structure.
parse_perf_probe_command() is used to do the main parsing works.
Parsing result is stored into a global array. This is because
add_perf_probe_events() is non-reentrantable. In following
If both LIBBPF and DWARF is detected, it is possible to create prologue
for eBPF programs to help them accessing kernel data. HAVE_BPF_PROLOGUE
and CONFIG_BPF_PROLOGUE is added as flags for this feature.
PERF_HAVE_ARCH_GET_REG_OFFSET indicates an architecture supports
converting name of a
This patch drops struct __event_package structure. Instead, it adds
trace_probe_event into 'struct perf_probe_event'.
trace_probe_event information give further patches a chance to access
actual probe points and actual arguments. Using them, bpf_loader will
be able to attach one bpf program to
When failure occures in add_probe_trace_event(), tev->args is
incomplete. Since information in tev may be used in further, this patch
frees the allocated memory and set it to NULL to avoid dangling
pointer.
Signed-off-by: Wang Nan
---
tools/perf/util/probe-finder.c | 4
1 file changed, 4
In this patch, kprobe points are created using add_perf_probe_events.
Since all events are already grouped together in an array, calling
add_perf_probe_events() once creates all of them.
probe_conf.max_probes is set to MAX_PROBES to support glob matching.
Signed-off-by: Wang Nan
---
From: He Kuang
This patch moves filter.h from include/linux/kernel.h to
tools/include/linux/filter.h to enable other libraries use macros in
it, like libbpf which will be introduced by further patches. Currenty,
the moved filter.h only contains the useful macros needed by libbpf
for not
In this patch PERF_EVENT_IOC_SET_BPF ioctl is used to attach eBPF
program to a newly created perf event. The file descriptor of the
eBPF program is passed to perf record using previous patches, and
stored into evsel->bpf_fd.
It is possible that different perf event are created for one kprobe
This patch allows creating only one BPF program for different tevs
in one pev, if their prologue are identical.
This is done by comparing argument list of different tev, and maps type
of prologue and tev using a mapping array. This patch use qsort to sort
tevs prior type mapping for performance.
This patch generates prologue for a BPF program which fetch arguments
for it. With this patch, the program can have arguments as follow:
SEC("lock_page=__lock_page page->flags")
int lock_page(struct pt_regs *ctx, int err, unsigned long flags)
{
return 1;
}
This patch passes at most
Before this patch, add_perf_probe_events() init symbol maps only for
uprobe if the first 'struct perf_probe_event' passed to it is a uprobe
event. This is a trick because 'perf probe''s command line syntax
constrains the first elements of the probe_event arrays must be kprobes
if there is one.
This patch generates prologue for each 'struct probe_trace_event' for
fetching arguments for BPF programs.
After bpf__probe(), iterate over each programs to check whether
prologue is required. If none of 'struct perf_probe_event' a program
will attach has at least one argument, simply skip
From: He Kuang
Make perf-record command support --vmlinux option if BPF_PROLOGUE is on.
'perf record' needs vmlinux as the source of DWARF info to generate
prologue for BPF programs, so path of vmlinux should be specified.
Short name 'k' has been taken by 'clockid'. This patch skips the short
From: He Kuang
arch_get_reg_info() is a helper function which converts register name
like "%rax" to offset of a register in 'struct pt_regs', which is
required by BPF prologue generator.
This patch replaces original string table by a 'struct reg_info' table,
which records offset of registers
This patch appends new syntax to BPF object section name to support
probing at uprobe event. Now we can use BPF program like this:
SEC(
"target=/lib64/libc.so.6\n"
"libcwrite=__write"
)
int libcwrite(void *ctx)
{
return 1;
}
Where, in section name of a program, before the main config
This patch enables passing source files to --event directly using:
# perf record --event bpf-file.c command
This patch does following works:
1) Allow passing '.c' file to '--event'. parse_events_load_bpf() is
expanded to allow caller tell it whether the passed file is source
file or
To support dynamic compiling, this patch allows caller to pass a
in-memory buffer to libbpf by bpf_object__open_buffer(). libbpf
calls elf_memory() to open it as ELF object file.
Because __bpf_object__open() collects all required data and won't need
that buffer anymore, libbpf uses that buffer
If an eBPF program accesses a map, LLVM generates a load instruction
which loads an absolute address into a register, like this:
ld_64 r1,
...
call2
That ld_64 instruction will be recorded in relocation section.
To enable the usage of that map, relocation must be done by replacing
This is the core patch for supporting eBPF on-the-fly compiling, does
the following work:
1. Search clang compiler using search_program().
2. Run command template defined in llvm-bpf-cmd-template option in
[llvm] config section using read_from_pipe(). Patch of clang and
source code
Expand bpf_obj_elf_collect() to collect license and kernel version
information in eBPF object file. eBPF object file should have a section
named 'license', which contains a string. It should also have a section
named 'version', contains a u32 LINUX_VERSION_CODE.
bpf_obj_validate() is introduced
>drivers/mtd/spi-nor/spi-nor.c | 2 ++
> 1 file changed, 2 insertions(+)
>diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c
>index e8f6131..10ba94f 100644
>--- a/drivers/mtd/spi-nor/spi-nor.c
>+++ b/drivers/mtd/spi-nor/spi-nor.c
>@@ -1398,6 +1398,8 @@ static int
This is the first patch of libbpf. The goal of libbpf is to create a
standard way for accessing eBPF object files. This patch creates
'Makefile' and 'Build' for it, allows 'make' to build libbpf.a and
libbpf.so, 'make install' to put them into proper directories.
Most part of Makefile is borrowed
This patch implements MT8173 cpufreq driver.
Signed-off-by: Pi-Cheng Chen
---
drivers/cpufreq/Kconfig.arm | 7 +
drivers/cpufreq/Makefile | 1 +
drivers/cpufreq/mt8173-cpufreq.c | 520 +++
3 files changed, 528 insertions(+)
create mode
This patch add an accessor which allows caller to get count of programs
in an object file.
Signed-off-by: Wang Nan
Acked-by: Alexei Starovoitov
---
tools/lib/bpf/libbpf.c | 9 +
tools/lib/bpf/libbpf.h | 3 +++
2 files changed, 12 insertions(+)
diff --git a/tools/lib/bpf/libbpf.c
MT8173 is a ARMv8 based SoC with 2 clusters. All CPUs in a single cluster
share the same power and clock domain. This series tries to add cpufreq support
for MT8173 SoC.
changes in v5:
- Move resource allocation code from init() into probe() and remove some unused
functions due to this change
-
This patch adds device tree binding document for MT8173 cpufreq driver.
Signed-off-by: Pi-Cheng Chen
Reviewed-by: Michael Turquette
---
.../devicetree/bindings/cpufreq/cpufreq-mt8173.txt | 145 +
1 file changed, 145 insertions(+)
create mode 100644
This patch collects all programs in an object file into an array of
'struct bpf_program' for further processing. That structure is for
representing each eBPF program. 'bpf_prog' should be a better name, but
it has been used by linux/filter.h. Although it is a kernel space name,
I still prefer to
This patch adds a bpf_fd field to 'struct evsel' then introduces method
to config it. In bpf-loader, a bpf__foreach_tev() function is added,
Which calls the callback function for each 'struct probe_trace_event'
events for each bpf program with their file descriptors. In evlist.c,
This patch introduces accessors for user of libbpf to retrieve section
name and fd of a opened/loaded eBPF program. 'struct bpf_prog_handler'
is used for that purpose. Accessors of programs section name and file
descriptor are provided. Set/get private data are also impelmented.
Signed-off-by:
bpf_obj_elf_collect() is introduced to iterate over each elf sections
to collection information in eBPF object files. This function will
futher enhanced to collect license, kernel version, programs, configs
and map information.
Signed-off-by: Wang Nan
Acked-by: Alexei Starovoitov
---
This is the 10th version which tries to introduce eBPF programs to perf.
Compare with v9 there are only some small changes:
1. Squash patch 2/50 and 3/50 in v9 together, never check host
include/linux/bpf.h, so bpf feature check will always green.
2. Fix compiling error when
This patch detects kernel build directory using a embedded shell
script 'kbuild_detector', which does this by checking existence of
include/generated/autoconf.h.
clang working directory is changed to kbuild directory if it is found,
to help user use relative include path. Following patch will
This patch introduces [llvm] config section with 5 options. Following
patches will use then to config llvm dynamica compiling.
'llvm-utils.[ch]' is introduced in this patch for holding all
llvm/clang related stuffs.
Example:
[llvm]
# Path to clang. If omit, search it from $PATH.
This patch collects symbols section. This section is useful when
linking ELF maps.
Signed-off-by: Wang Nan
Acked-by: Alexei Starovoitov
---
tools/lib/bpf/libbpf.c | 10 ++
1 file changed, 10 insertions(+)
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index
bpf_load_program() can be used to load bpf program into kernel. To make
loading faster, first try to load without logbuf. Try again with logbuf
if the first try failed.
Signed-off-by: Wang Nan
Acked-by: Alexei Starovoitov
---
tools/lib/bpf/bpf.c | 34 ++
This patch creates maps based on 'map' section in object file using
bpf_create_map(), and stores the fds into an array in
'struct bpf_object'.
Previous patches parse ELF object file and collecte required data, but
doesn't play with kernel. They belong to 'opening' phase. This patch is
the first
To prevent caller from creating additional structures to hold
pointers of 'struct bpf_object', this patch link all such
structures onto a list (hidden to user). bpf_object__for_each() is
introduced to allow users iterate over each objects.
bpf_object__for_each() is safe even user close the object
This patch records the indics of instructions which are needed to be
relocated. Those information are saved in 'reloc_desc' field in
'struct bpf_program'. In loading phase (this patch takes effect in
opening phase), the collected instructions will be replaced by
map loading instructions.
Since we
This patch collects relocation sections into 'struct object'.
Such sections are used for connecting maps to bpf programs.
'reloc' field in 'struct bpf_object' is introduced for storing
such information.
This patch simply store the data into 'reloc' field. Following
patch will parse them to know
Check endianness according to EHDR. Code is taken from
tools/perf/util/symbol-elf.c.
Libbpf doesn't magically convert missmatched endianness. Even if we swap
eBPF instructions to correct byte order, we are unable to deal with
endianness in code logical generated by LLVM.
Therefore, libbpf should
By libbpf_set_print(), users of libbpf are allowed to register he/she
own debug, info and warning printing functions. Libbpf will use those
functions to print messages. If not provided, default info and warning
printing functions are fprintf(stderr, ...); default debug printing
is NULL.
This API
If maps are used by eBPF programs, corresponding object file(s) should
contain a section named 'map'. Which contains map definitions. This
patch copies the data of the whole section. Map data parsing should be
acted just before map loading.
Signed-off-by: Wang Nan
Acked-by: Alexei Starovoitov
This patch introduces bpf.c and bpf.h, which hold common functions
issuing bpf syscall. The goal of these two files is to hide syscall
completely from user. Note that bpf.c and bpf.h deal with kernel
interface only. Things like structure of 'map' section in the ELF
object is not cared by of
This patch defines basic interface of libbpf. 'struct bpf_object' will
be the handler of each object file. Its internal structure is hide to
user. eBPF object files are compiled by LLVM as ELF format. In this
patch, libelf is used to open those files, read EHDR and do basic
validation according to
By copying BPF related operation to uprobe processing path, this patch
allow users attach BPF programs to uprobes like what they are already
doing on kprobes.
After this patch, users are allowed to use PERF_EVENT_IOC_SET_BPF on a
uprobe perf event. Which make it possible to profile user space
Commit e1abf2cc8d5d80b41c4419368ec743ccadbb131e ("bpf: Fix the build on
BPF_SYSCALL=y && !CONFIG_TRACING kernels, make it more configurable")
updated the building condition of bpf_trace.o from CONFIG_BPF_SYSCALL
to CONFIG_BPF_EVENTS, but the corresponding #ifdef controller in
ftrace_event.h for
On 2015/7/1 2:35, Rafael J. Wysocki wrote:
> On Tue, Jun 30, 2015 at 8:25 PM, Rafael J. Wysocki wrote:
>> Hi Al,
>>
>> On Tue, Jun 30, 2015 at 7:29 PM, Al Stone wrote:
>>> On 06/30/2015 11:07 AM, Sudeep Holla wrote:
Hi Al,
On 18/06/15 23:36, Al Stone wrote:
> In the ACPI 5.1
On 06/30/2015 09:32 PM, Charles Keepax wrote:
> Currently micd_dbtime can be set to 0 for default, 1 for 4 measurements,
> or a greater than 16-bit value for 2 measurements. This patch simplifies
> the symantics to 2 for 2 measurements, 4 for 4 measurements and any
> other value for the default.
>
Hi Linus,
I'm pleased to send this pull request which among others contains Linux port to
HS38x cores based on new ARCv2 ISA from Synopsys.
We've been working on this for more than a year now and it feels good to hand it
over now.
Some of the patches have been reviewed by experts: Peter and
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