This commit introduces several changes to Smack to prepare it for
namespace implementation. All the changes are related to namespaces.
Overview of the changes:
- Adds required data structures for mapped labels and functions to
operate on them.
- Implements the proc interface
This patch collect name of map in BPF object files and saves them into
'maps' field in 'struct bpf_object'. 'bpf_object__get_map_by_name' is
introduced to retrive map fd and definitions through its name.
Signed-off-by: Wang Nan
Signed-off-by: He Kuang
Cc: Arnaldo Carvalho de Melo
Cc: Alexei
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.
This patch allows creating only one BPF program for different
'probe_trace_event'(tev) generated by one 'perf_probe_event'(pev), if
their prologues 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 utilizes
This patch utilizes bpf_object__load() provided by libbpf to load all
objects into kernel.
Signed-off-by: Wang Nan
Cc: Alexei Starovoitov
Cc: Brendan Gregg
Cc: Daniel Borkmann
Cc: David Ahern
Cc: He Kuang
Cc: Jiri Olsa
Cc: Kaixu Xia
Cc: Masami Hiramatsu
Cc: Namhyung Kim
Cc: Paul
This patch introduces bpf__{un,}probe() functions to enable callers to
create kprobe points based on section names a BPF program. It parses
the section names in the program and creates corresponding 'struct
perf_probe_event' structures. The parse_perf_probe_command() function is
used to do the
From: He Kuang
This patch adds new bison rules for specifying an alias name to a perf
event, which allows cmdline refer to previous defined perf event through
its name. With this patch user can give alias name to a perf event using
following cmdline:
# perf record -e mypmu=cycles ...
To allow
The 'bpf-loader.[ch]' files are introduced in this patch. Which will be
the interface between perf and libbpf. bpf__prepare_load() resides in
bpf-loader.c. Following patches will enrich these two files.
Signed-off-by: Wang Nan
Signed-off-by: Arnaldo Carvalho de Melo
Acked-by: Alexei Starovoitov
This patch collects more information from maps sections in BPF object
files into 'struct bpf_object', enables later patches access those
information (such as the type and size of the map).
In this patch, a new handler 'struct bpf_map' is extracted in parallel
with bpf_object and bpf_program. Its
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 collects 'struct perf_evsel' for every probing points in BPF
object file(s) and fill 'struct evlist'. The previous introduced dummy
event now removed. After this patch, following command:
# perf record --event filter.o ls
Can trace on each probing points defined in filter.o.
The
This patch introduces a new macro "__NR_CPUS__" to perf's embedded
clang compiler, which represent the available CPU counters in this
system. BPF program can use this macro to create a map with same
number of system CPUs. For exmaple:
struct bpf_map_def SEC("maps") pmu_map = {
.type =
This patch does some small miscellaneous cleanups and additions that
should not change the code behaviour in any way. Its only purpose is to
shape the code in a way that the smack namespace patches would be
smaller and easier to understand.
Changes:
- four small helper functions added
- minor
When failure occures in add_probe_trace_event(), args in
probe_trace_event is incomplete. Since information in it may be used
in futher, this patch frees the allocated memory and set it to NULL
to avoid dangling pointer.
Signed-off-by: Wang Nan
Cc: Alexei Starovoitov
Cc: Brendan Gregg
Cc:
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
ping.
Am 03.10.2015 um 22:46 schrieb H. Nikolaus Schaller :
> If the host toolchain is not glibc based then the arm kernel build
> fails with
>
> HOSTCC arch/arm/vdso/vdsomunge
> arch/arm/vdso/vdsomunge.c:48:22: fatal error: byteswap.h: No such file or
> directory
>
> Observed: with
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 to has at least one argument, simply skip
This patch replaces the original toy BPF program with previous introduced
bpf-script-example.c. Dynamically embedded it into 'llvm-src.c'.
The newly introduced BPF program attaches a BPF program at
'sys_epoll_pwait()', and collect half samples from it. perf itself never
use that syscall, so
From: He Kuang
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
This patch provides infrastructure for 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
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
in the git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/pi3orama/linux.git
tags/perf-ebpf-for-acme-20151014
for you to fetch changes up to 6df036cb7d42a2e0ebf312e127b02425bd57bc55:
perf tools: Enable BPF object configure syntax (2015-10-14 10:0
This commit uses all the changes introduced in "namespace groundwork"
and previous preparation patches and makes smack aware of its namespace
and mapped labels.
It modifies the following functions to be namespace aware:
- smk_access
- smk_find_label_name
- smk_get_label
And all functions that
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
If both LIBBPF and DWARF are 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_REGS_QUERY_REGISTER_OFFSET indicates an architecture
supports converting name
regs_query_register_offset() in dwarf-regs.c is required by BPF prologue.
Make it be compiled if CONFIG_BPF_PROLOGUE is on to avoid building failure
when CONFIG_BPF_PROLOGUE is on but CONFIG_DWARF is not set.
Signed-off-by: Wang Nan
Signed-off-by: He Kuang
Acked-by: Masami Hiramatsu
Cc: Alexei
Smackfs/syslog is analogous to onlycap and unconfined. When not filled
they don't do anything. In such cases onlycap and unconfined displayed
nothing when read, but syslog unconditionally displayed star. This
doesn't work well with namespaces where the star could have been
unmapped. Besides the
From: He Kuang
In perf record, before start recording, call bpf__apply_config() to
turn on all BPF config options.
Signed-off-by: Wang Nan
Signed-off-by: He Kuang
Cc: Arnaldo Carvalho de Melo
Cc: Alexei Starovoitov
Cc: Brendan Gregg
Cc: Daniel Borkmann
Cc: David Ahern
Cc: He Kuang
Cc:
From: He Kuang
Add helper function bpf_map_update_elem() which calls sys_bpf syscall
to update elements in bpf maps.
Signed-off-by: Wang Nan
Signed-off-by: He Kuang
Cc: Arnaldo Carvalho de Melo
Cc: Alexei Starovoitov
Cc: Brendan Gregg
Cc: Daniel Borkmann
Cc: David Ahern
Cc: He Kuang
Cc:
This patch adds BPF testcase for testing BPF event filtering.
By utilizing the result of 'perf test LLVM', this patch compiles the
eBPF sample program then test it ability. The BPF script in 'perf test
LLVM' collects half of execution of epoll_pwait(). This patch runs 111
times of it, so the
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
Cc: Alexei
bpf__apply_config() is introduced as the core CPI to apply config
options to all BPF objects. This patch also does the real work for
setting maps events for BPF_MAP_TYPE_PERF_EVENT_ARRAY maps by inserting
file descriptions of a evsel into the BPF map.
This patch is required because we are unable
bpf__config_obj() is introduced as a core API to config BPF object
after loading. One configuration option of maps is introduced. After
this patch BPF object can accept configuration like:
maps.my_pmy.event=evt
Where evt is a predefined event with alias "evt".
Signed-off-by: Wang Nan
This patch adds the final step for BPF map configuration. A new syntax
is appended into parser so user can config BPF objects through '/' '/'
enclosed config terms.
After this patch, BPF programs for perf are finally able to utilize
bpf_perf_event_read() introduced in commit
Fourth version of Smack namespace. Rebased for smack-for-4.4 with some
minor cosmetic changes.
Readme from v3 as there were the most significant changes:
https://www.mail-archive.com/linux-kernel@vger.kernel.org/msg899383.html
Add a new LSM hook called before inode's setxattr. It is required for
LSM to be able to reliably replace the xattr's value to be set to
filesystem in __vfs_setxattr_noperm(). Useful for mapped values, like in
the upcoming Smack namespace patches.
Signed-off-by: Lukasz Pawelczyk
Acked-by: Serge
On 14/10/15 12:42, Mark Rutland wrote:
On Wed, Oct 14, 2015 at 12:20:24PM +0100, Suzuki K. Poulose wrote:
Also renames the symbols to prevent conflicts. e.g,
BLOCK_SHIFT => SWAPPER_BLOCK_SHIFT
This sounds sensible to be, so FWIW:
Acked-by: Mark Rutland
I have a couple of minor
This patch adds the flag sample_disable to control the trace data
output process when perf sampling. By setting this flag and
integrating with ebpf, we can control the data output process and
get the samples we are most interested in.
The bpf helper bpf_perf_event_sample_control() can control the
This patch creates a new ioctl PERF_EVENT_IOC_SET_ENABLER to let
perf to select an event as 'enabler'. So we can set this 'enabler'
event to enable/disable a set of events. The event on CPU 0 is
treated as the 'enabler' event by default.
Signed-off-by: Kaixu Xia
---
include/linux/perf_event.h
Previous RFC patch url:
https://lkml.org/lkml/2015/10/12/135
changes in V2:
- rebase the whole patch set to net-next tree(4b418bf);
- remove the added flag perf_sample_disable in bpf_map;
- move the added fields in structure perf_event to proper place
to avoid cacheline miss;
- use counter
On Wednesday 14 October 2015 12:34:00 Antoine Tenart wrote:
> Hi all,
>
> Some drivers used on a Marvell Berlin kernel were missing from
> multi_v7_defconfig. This series add them.
Adding them is great, but we try to have as much as possible
in loadable modules for new additions. Can you do
On Wed, Oct 14, 2015 at 01:07:17PM +0200, Peter Zijlstra wrote:
> On Wed, Oct 14, 2015 at 11:27:06AM +0100, Mark Brown wrote:
> > On Wed, Oct 14, 2015 at 10:20:50AM +0200, Peter Zijlstra wrote:
> > > Uuh, I just looked at next and saw this regulator_lock_supply()
> > > function. How is that
On Wed, 14 Oct 2015, Mark Brown wrote:
> On Wed, Oct 14, 2015 at 08:28:12AM +0100, Lee Jones wrote:
> > On Tue, 13 Oct 2015, Mark Brown wrote:
> > > On Tue, Oct 13, 2015 at 09:02:18AM +0100, Lee Jones wrote:
>
> > > > Providing Acks should not (and has not to my knowledge) be a binding
> > > >
Please check whether not releasing the lock is intentional.
julia
On Wed, 14 Oct 2015, kbuild test robot wrote:
> CC: kbuild-...@01.org
> CC: linux-kernel@vger.kernel.org
> TO: Ben Skeggs
>
> tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
> master
> head:
On 08/24/2015 04:19 AM, Joonsoo Kim wrote:
> Now, compaction algorithm become powerful. Migration scanner traverses
> whole zone range. So, old threshold for depleted zone which is designed
> to imitate compaction deferring approach isn't appropriate for current
> compaction algorithm. If we
On Wed, 14 Oct 2015, YH Huang wrote:
> Hi all,
>
> If you have any suggestion, please let me know.
> Thanks.
Please don't do that.
If you think the patch has fallen through the gaps, please just RESEND
it, like [RESEND vX] $subject.
> On Wed, 2015-09-16 at 22:42 +0800, YH Huang wrote:
> > In
On Oct 14, 2015, at 4:13 PM, AKASHI Takahiro wrote:
> On 10/09/2015 11:24 PM, James Morse wrote:
>> Hi Jungseok,
>>
>> On 07/10/15 16:28, Jungseok Lee wrote:
>>> Currently, a call trace drops a process stack walk when a separate IRQ
>>> stack is used. It makes a call trace information much less
On Wed, 2015-10-07 at 16:51 -0700, Lee Duncan wrote:
> Update the SCSI hosts module to use the ida_simple*() routines
> to manage its host_no index instead of an ATOMIC integer. This
> means that the SCSI host number will now be reclaimable.
>
> Signed-off-by: Lee Duncan
> ---
>
Linus Torvalds wrote:
> On Tue, Oct 13, 2015 at 5:21 AM, Tetsuo Handa
> wrote:
> >
> > If I remove
> >
> > /* Any of the zones still reclaimable? Don't OOM. */
> > if (zones_reclaimable)
> > return 1;
> >
> > the OOM killer is invoked even when there are so much
On Thu, Oct 08, 2015 at 03:45:47PM +0800, Chen Feng wrote:
> +static int hi6220_smmu_attach_dev(struct iommu_domain *domain,
> + struct device *dev)
> +{
> + struct hi6220_domain *m_domain = to_hi6220_domain(domain);
> +
> + smmu_domain_prepare(m_domain);
> +
On Oct 14, 2015, at 12:00 AM, Jungseok Lee wrote:
> On Oct 13, 2015, at 8:00 PM, James Morse wrote:
>> Hi Jungseok,
>
> Hi James,
>
>> On 12/10/15 23:13, Jungseok Lee wrote:
>>> On Oct 13, 2015, at 1:34 AM, James Morse wrote:
Having two kmem_caches for 16K stacks on a 64K page system may be
Add SAMA5D2 SoC plus Atmel flexcom and Atmel sdhci devices.
Signed-off-by: Ludovic Desroches
---
arch/arm/configs/sama5_defconfig | 6 +-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/arch/arm/configs/sama5_defconfig b/arch/arm/configs/sama5_defconfig
index 31eb951..6e806f5
Big update of the sama5d2.dtsi file since many patches have reached te
mainline:
- add generated clocks
- enable crypto devices
- add flexcom devices
- add tdes device
- add sdmmc devices
Signed-off-by: Ludovic Desroches
Signed-off-by: Nicolas Ferre
Signed-off-by: Cyrille Pitchen
---
Add sdmmc and flexcom devices
Signed-off-by: Ludovic Desroches
Signed-off-by: Cyrille Pitchen
---
arch/arm/boot/dts/at91-sama5d2_xplained.dts | 106
1 file changed, 106 insertions(+)
diff --git a/arch/arm/boot/dts/at91-sama5d2_xplained.dts
Expose VPID capability to L1. For nested guests, we don't do anything
specific for single context invalidation. Hence, only advertise support
for global context invalidation. The major benefit of nested VPID comes
from having separate vpids when switching between L1 and L2, and also
when L2's
VPID is used to tag address space and avoid a TLB flush. Currently L0 use
the same VPID to run L1 and all its guests. KVM flushes VPID when switching
between L1 and L2.
This patch advertises VPID to the L1 hypervisor, then address space of L1
and L2 can be separately treated and avoid TLB flush
On Wed, Oct 14, 2015 at 12:20:25PM +0100, Suzuki K. Poulose wrote:
> We use section maps with 4K page size to create the swapper/idmaps.
> So far we have used !64K or 4K checks to handle the case where we
> use the section maps.
> This patch adds a new symbol, ARM64_SWAPPER_USES_SECTION_MAPS, to
>
Add the INVVPID instruction emulation.
Reviewed-by: Wincy Van
Signed-off-by: Wanpeng Li
---
arch/x86/include/asm/vmx.h | 1 +
arch/x86/kvm/vmx.c | 61 +-
2 files changed, 61 insertions(+), 1 deletion(-)
diff --git
v2 -> v3:
* separate nested_vmx_vpid_caps and move checks to patch 3/5,
only rejoin them when reading the MSR.
v1 -> v2:
* set bit 32 of the VMX_EPT_VPID_CAP MSR
* check against the supported types in the implementation of
the INVVPID instruction
* the memory operand must always be
Adjust allocate/free_vid so that they can be reused for the nested vpid.
Reviewed-by: Wincy Van
Signed-off-by: Wanpeng Li
---
arch/x86/kvm/vmx.c | 25 -
1 file changed, 12 insertions(+), 13 deletions(-)
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index
Introduce __vmx_flush_tlb() to handle specific vpid. It will be
used by later patches, note that the "all context" variant can
be mapped to vpid_sync_vcpu_single with vpid02 as the argument
(a nice side effect of vpid02 design).
Reviewed-by: Wincy Van
Signed-off-by: Wanpeng Li
---
> On Oct 14, 2015, at 16:23, Arnd Bergmann wrote:
>
> On Wednesday 14 October 2015 10:41:26 yalin wang wrote:
>
>>> On Oct 13, 2015, at 23:20, Catalin Marinas wrote:
I'm not sure we want this. See:
https://lkml.org/lkml/2015/10/9/699
>>>
>>> Thanks Will and Arnd, I missed
On Wed, Oct 14, 2015 at 11:17 AM, Heloise NH wrote:
> Signed-off-by: Heloise NH
The patch is a correct one, however can you update the subject and
description to be more informative?
Please add that new_inode() function can fail for allocation only.
> ---
>
On 14/10/15 14:37, Sebastian Reichel wrote:
> Hi,
>
> On Wed, Oct 14, 2015 at 02:27:27PM +0300, Roger Quadros wrote:
>> On 14/10/15 14:19, Sebastian Reichel wrote:
>>> On Wed, Oct 14, 2015 at 01:44:16PM +0300, Roger Quadros wrote:
Let's keep the SSI ports disabled in the omap3.dtsi to avoid
Hi Steve,
On Thu, Sep 10, 2015 at 06:19:28PM +0100, Steven Rostedt wrote:
> On Thu, 10 Sep 2015 18:09:31 +0100
> Javi Merino wrote:
>
> > Tracing is useful for debugging and performance tuning. Add similar
> > traces to what's present in the cpu cooling device.
> >
> > Cc: Zhang Rui
> > Cc:
Franklin,
On 14/10/15 14:36, Roger Quadros wrote:
> On 13/10/15 04:38, Franklin S Cooper Jr wrote:
>> Switch from dma_request_channel to allow passing dma channel
>> information from DT rather than hardcoding a value.
>>
>> Signed-off-by: Franklin S Cooper Jr
>
> Acked-by: Roger Quadros
>
>>
Waking the reader immediately upon receipt of TTY_BREAK or TTY_PARITY
chars has no effect on the outcome of read():
1. Only non-canonical/EXTPROC mode applies since canonical mode
will not return data until a line termination is received anyway
2. EXTPROC mode - the reader will always be woken
We no longer have users for these functions so they can be removed.
Remove also unused enums from the header file.
Signed-off-by: Peter Ujfalusi
---
arch/arm/common/edma.c | 376 -
include/linux/platform_data/edma.h | 33
2 files changed,
If the of_dma_controller is registered in the non dmaengine driver we could
have race condition:
the of_dma_controller has been registered, but the dmaengine driver is not
yet probed. Drivers requesting DMA channels during this window will fail
since we do not yet have dmaengine drivers
On 13/10/15 04:38, Franklin S Cooper Jr wrote:
> Add additional details to the gpmc and nand documentation to clarify
> what is needed to enable nand dma prefetch.
>
> Signed-off-by: Franklin S Cooper Jr
> ---
> Documentation/devicetree/bindings/memory-controllers/omap-gpmc.txt | 7
> ++-
>
Since the driver stack no longer depends on lookup with id number in a
global array of pointers, the limitation for the number of eDMAs are no
longer needed. We can handle as many eDMAs in legacy and DT boot as we have
memory for them to allocate the needed structures.
Signed-off-by: Peter
The upcoming change to merge the arch/arm/common/edma.c into
drivers/dma/edma.c will need this change when booting daVinci devices in
no DT mode.
Signed-off-by: Peter Ujfalusi
Acked-by: Sekhar Nori
---
arch/arm/mach-davinci/devices-da8xx.c | 2 ++
arch/arm/mach-davinci/dm355.c | 1 +
Instead of using defines to specify the size of different arrays and
bitmaps, allocate the memory for them based on the information we get from
the HW itself.
Since these defines are set based on the worst case, there are devices
where they are not valid.
Signed-off-by: Peter Ujfalusi
---
Instead of relying on indexes pointing to edma private date in the global
pointer array, pass the private data pointer via the public API.
Signed-off-by: Peter Ujfalusi
---
arch/arm/common/edma.c | 305 ++---
drivers/dma/edma.c | 79
Be consistent and do not mix the use of dev, >dev, etc in the
functions.
Signed-off-by: Peter Ujfalusi
---
drivers/dma/edma.c | 61 +++---
1 file changed, 30 insertions(+), 31 deletions(-)
diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c
Merge the iomem into the 'struct edma' and change the internal (static)
functions to use pointer to the edma_cc instead of the ctlr number.
Signed-off-by: Peter Ujfalusi
---
arch/arm/common/edma.c | 400 -
1 file changed, 197 insertions(+), 203
Remove or rewrite the comments for the internal functions.
Signed-off-by: Peter Ujfalusi
---
drivers/dma/edma.c | 86 +++---
1 file changed, 11 insertions(+), 75 deletions(-)
diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c
index
We have access to dev, so it is better to use the dev_dbg for debug prints.
Signed-off-by: Peter Ujfalusi
---
drivers/dma/edma.c | 24
1 file changed, 12 insertions(+), 12 deletions(-)
diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c
index
With the merger of the arch/arm/common/edma.c code into the dmaengine
driver, there is no longer need to have per channel callback/data storage
for interrupt events.
Signed-off-by: Peter Ujfalusi
---
drivers/dma/edma.c | 450 -
1 file changed,
Warning message in case of linking between paRAM slots in different eDMA
controllers.
Signed-off-by: Peter Ujfalusi
---
drivers/dma/edma.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c
index f6653da0ee16..d33ae0b43925 100644
---
Instead of directly reading it from CCCFG register take the information out
once when we set up the configuration from the HW.
Signed-off-by: Peter Ujfalusi
---
drivers/dma/edma.c | 8 ++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c
On Wed, Oct 14, 2015 at 1:08 PM, Andy Shevchenko
wrote:
> +Cc: Jarkko to see from spi-pxa2xx prospective
>
> On Wed, Oct 14, 2015 at 12:47 PM, Ivan T. Ivanov wrote:
>> Adding Andy.
>>
>>
>>> On Oct 13, 2015, at 12:01 AM, Franklin S Cooper Jr wrote:
>>>
>>> Some devices depend on the master
No need to run through the bits in QEMR and CCERR events since they will
not trigger any action, so just clearing the errors there is fine.
In case of the missed event the loop can be optimized so we spend less time
to handle the event.
Signed-off-by: Peter Ujfalusi
---
drivers/dma/edma.c | 82
On 13/10/15 04:38, Franklin S Cooper Jr wrote:
> Add dma channel information to the gpmc. Although not enabled by
> default this will allow prefetch-dma to be used.
>
> Signed-off-by: Franklin S Cooper Jr
> ---
> arch/arm/boot/dts/am33xx.dtsi | 2 ++
> arch/arm/boot/dts/am4372.dtsi | 2 ++
>
If the eDMA3 has support for channel paRAM slot mapping we can utilize it
to allocate slots on demand and save precious slots for real transfers.
On am335x the eDMA has 64 channels which means we can unlock 64 paRAM
slots out from the available 256.
Signed-off-by: Peter Ujfalusi
---
In the ccerr interrupt handler the code checks for pending errors in the
error status registers in two different places.
Move the check out to a helper function.
Signed-off-by: Peter Ujfalusi
---
drivers/dma/edma.c | 20
1 file changed, 12 insertions(+), 8 deletions(-)
edma_write_slot() is for writing an entire paRAM slot.
Signed-off-by: Peter Ujfalusi
---
drivers/dma/edma.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c
index 08f9bd0aa0b3..f6653da0ee16 100644
--- a/drivers/dma/edma.c
+++
The names chosen for the bitfields were quite confusing and given no real
information on what they are used for...
edma_inuse -> slot_inuse: tracks the slot usage/availability
edma_unused -> channel_unused: tracks the channel usage/availability
Signed-off-by: Peter Ujfalusi
---
Move the code out from arch/arm/common and merge it inside of the dmaengine
driver.
This change is done with as minimal (if eny) functional change to the code
as possible to avoid introducing regression.
Signed-off-by: Peter Ujfalusi
Acked-by: Tony Lindgren
---
arch/arm/Kconfig
When allocating a memory for number of items it is better (looks better)
to use devm_kcalloc.
Signed-off-by: Peter Ujfalusi
---
drivers/dma/edma.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c
index d5a76c67f83f..95c10373168d
In case when the interrupt happened for the second eDMA the channel
number was incorrectly passed to the client driver.
Signed-off-by: Peter Ujfalusi
CC:
---
arch/arm/common/edma.c | 6 --
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/arch/arm/common/edma.c
The code path in edma_execute() and edma_callback() can be simplified
and make it more optimal.
There is not need to call in to edma_execute() when the transfer
has been finished for example.
Also the handling of missed/first or next batch of paRAMs can
be done in a more optimal way.
Convert the eDMA platform device creation to use
struct platform_device_info XX __initconst and
platform_device_register_full()
This will allow us to cleanly specify the dma_mask for the devices in an
upcoming patch.
Signed-off-by: Peter Ujfalusi
Acked-by: Sekhar Nori
---
Currently we have one device created to handle all (maximum 2) eDMAs in the
system.
With this change all eDMA instance will have it's own device/driver.
This change is needed for further cleanups in the eDMA driver stack since
the one device/driver to handle all eDMAs in the system was not
Hi,
Changes since v4:
- checkpatch errors/warnings/checks has been fixed in spot and not in a followup
patch.
- Sekhar's Acked-by added to patches touching arch/arm/mach-davinci/
- Other comments for v4 has been addressed
Changes since v3:
- Separated the two (patch 10/11 in v2 patch 10 in v3)
On Wed, Oct 14, 2015 at 12:20:24PM +0100, Suzuki K. Poulose wrote:
> Move the kernel pagetable (both swapper and idmap) definitions
> from the generic asm/page.h to a new file, asm/kernel-pgtable.h.
>
> This is mostly a cosmetic change, to clean up the asm/page.h to
> get rid of the arch specific
On systems that initialize the intel_pstate driver with the performance
governor, and then switch to the powersave governor will not transition to
lower cpu frequencies until /sys/devices/system/cpu/intel_pstate/min_perf_pct
is set to a low value.
The behavior of governor switching changed after
On 13/10/15 04:38, Franklin S Cooper Jr wrote:
> The prefetch engine sends a dma request once a FIFO threshold has
> been met. No other requests are received until the previous request
> is handled.
>
> Starting an edma transfer (dma_async_issue_pending) results in any
> previous event for the
Hi,
On Wed, Oct 14, 2015 at 01:44:15PM +0300, Roger Quadros wrote:
> The error handling path is broken as cawake_gpio was defined as
> unsigned integer causing the following warnings on boards that don't
> use SSI port and so don't have cawake_gpio defined. e.g. beagleboard C4.
>
> [...]
Thanks,
On 10/14/2015 04:34 PM, Roger Quadros wrote:
> Vignesh,
>
> On 14/10/15 12:12, Vignesh R wrote:
>>
>>
>> On 10/14/2015 02:16 PM, Roger Quadros wrote:
>>
>>>
>>> On 14/10/15 08:52, Vignesh R wrote:
On am437x-gp-evm, pixcir_i2c_ts can wakeup the system from lower power
state via pinctrl
801 - 900 of 2330 matches
Mail list logo
