When running the ebb tests after building on a ppc64le Ubuntu machine:
$ pmu/ebb/reg_access_test: error while loading shared libraries:
R_PPC64_ADDR16_HI reloc at 0x000000013a965130 for symbol `' out of
range
This is because the Ubuntu toolchain builds has PIE enabled by default.
Change it to be always off instead.
Signed-off-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
We should use TEST_GEN_PROGS, not TEST_PROGS. That tells the selftests
makefile (lib.mk) that those tests are generated (built), and so it
adds the $(OUTPUT) prefix for us, making the out-of-tree build work
correctly.
It also means we don't need our own clean rule, lib.mk does it.
We also have to update the signal_tm rule to use $(OUTPUT).
Signed-off-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
We should use TEST_GEN_PROGS, not TEST_PROGS. That tells the selftests
makefile (lib.mk) that those tests are generated (built), and so it
adds the $(OUTPUT) prefix for us, making the out-of-tree build work
correctly.
It also means we don't need our own clean rule, lib.mk does it.
We also have to update the ptrace-pkey and core-pkey rules to use
$(OUTPUT).
Signed-off-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This device uses the SIPODEV SP1064 touchpad, which does not
supply descriptors, so it has to be added to the override list.
Reported-by: Tim Aldridge <taldridge@mac.com>
Signed-off-by: Julian Sax <jsbc@gmx.de>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Program the timeout values (in escape clock) for HS TX, LP RX and TA
timeout.
HX TX: Ensure that host does not continuously transmit in the HS
state. If this timer expires, then host will gracefully end its HS
transmission and allow the link to enter into LP state.
LP RX: Monitor the length of LP receptions from Peripheral. If timeout
happens then host will drive the stop state onto all data lanes (only
Data Lane 0 should be receiving anything from the Peripheral). This
effectively takes back ownership of the bus transmit in the HS state.
TA timeout: Timeout valuefor monitoring Bus Turn-Around (BTA) sequence.
BTA sequence should complete within a bounded amount of time, with
peripheral acknowledging BTA by driving the stop state.
v2 by Jani:
- Rebase
- Use intel_dsi_bitrate() and intel_dsi_tlpx_ns(intel_dsi)
- Squash HX TX, LP RX and TA timeout into one patch
- Fix bspec mode set sequence reference
- Add FIXME about two timeouts
Signed-off-by: Madhav Chauhan <madhav.chauhan@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/60e610ccffe5f8c09dee1c65828f28f25227efce.1540900289.git.jani.nikula@intel.com
Kaixuxia repors that it's possible to crash overlayfs by removing the
whiteout on the upper layer before creating a directory over it. This is a
reproducer:
mkdir lower upper work merge
touch lower/file
mount -t overlay overlay -olowerdir=lower,upperdir=upper,workdir=work merge
rm merge/file
ls -al merge/file
rm upper/file
ls -al merge/
mkdir merge/file
Before commencing with a vfs_rename(..., RENAME_EXCHANGE) verify that the
lookup of "upper" is positive and is a whiteout, and return ESTALE
otherwise.
Reported by: kaixuxia <xiakaixu1987@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Fixes: e9be9d5e76 ("overlay filesystem")
Cc: <stable@vger.kernel.org> # v3.18
This patch sends command and executes display off,
assert reset, power off VBT seqeuences to power
down DSI panel. Patch also adds high level function
to wrap all the panel sepcific programming during
DSI disabling.
Signed-off-by: Madhav Chauhan <madhav.chauhan@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/efdafbf6b4d31123738b87b2d8264a9b5553eb32.1540900289.git.jani.nikula@intel.com
Driver needs payload/header credits for sending any command
and data over DSI link. These credits are released once command
or data sent to link. This patch adds functions to wait for releasing
of payload and header credits.
As per BSPEC, driver needs to ensure that all of commands/data
has been dispatched to panel before the transcoder is enabled.
This patch implement those steps i.e. sending NOP DCS command,
wait for header/payload credit to be released etc.
v2 by Jani:
- squash the credit wait helpers patch with the first user
- pass dev_priv to the credit wait helpers
- bikeshed credit helper names
- wait for *at least* the current maximum number of credits
- indentation fix
- add helpers for credits available
Signed-off-by: Madhav Chauhan <madhav.chauhan@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/84bc509beabf2a2d1324a9f2a67ab4ebe05b10a6.1540900289.git.jani.nikula@intel.com
Commit b24413180f ("License cleanup: add SPDX GPL-2.0 license
identifier to files with no license") added "SPDX-License-Identifier:
GPL-2.0" to files which previously had no license, change this to MIT
for intel_ringbuffer.h matching the license text of intel_ringbuffer.c.
Signed-off-by: Jonathan Gray <jsg@jsg.id.au>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181031005331.20775-1-jsg@jsg.id.au
When building with clang (8 trunk, 7.0 release) the frame size limit is
hit:
arch/powerpc/xmon/xmon.c:452:12: warning: stack frame size of 2576
bytes in function 'xmon_core' [-Wframe-larger-than=]
Some investigation by Naveen indicates this is due to clang saving the
addresses to printf format strings on the stack.
While this issue is investigated, bump up the frame size limit for xmon
when building with clang.
Link: https://github.com/ClangBuiltLinux/linux/issues/252
Signed-off-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
GVT-g only simulates DP port for guest and leaves EDP_PSR_IMR
and EDP_PSR_IIR registers as default MMIO read/write.
So guest won't get expected initial values of these registers when
initializing the gpu driver, which results in following warning and logs.
--------
Interrupt register 0x64838 is not zero: 0xffffffff
WARNING: CPU: 1 PID: 157 at drivers/gpu/drm/i915/i915_irq.c:177
gen3_assert_iir_is_zero+0x38/0xa0
Call Trace:
gen8_de_irq_postinstall+0xa7/0x400
gen8_irq_postinstall+0x27/0x80
drm_irq_install+0xbc/0x140
i915_driver_load+0xa9d/0xd50
--------
Because GVT-g does not handle EDP(embedded DP) simulation for guests,
always set EDP_PSR_IMR and EDP_PSR_IIR to value 0.
Signed-off-by: Longhe Zheng <longhe.zheng@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
CSFE_CHICKEN1(0x20d4) needs access with mask. This is caught in AcrnGT
conformance check test:
[drm:intel_gvt_vgpu_conformance_check]
*ERROR* gvt: vgpu1 unconformance mmio 0x20d4:0x40004,0x4
Signed-off-by: Xinyun Liu <xinyun.liu@intel.com>
Signed-off-by: Zhi Wang <zhi.a.wang@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Previously we assumed two 4-byte writes to the same PTE coming in sequence.
But recently we observed inconsecutive partial write happening as well. So
this patch enhances the previous solution. It now uses a list to save more
partial writes. If one partial write can be combined with another one in
the list to construct a full PTE, update its shadow entry. Otherwise, save
the partial write in the list.
v2: invalidate old entry and flush ggtt (Zhenyu)
v3: split old ggtt page unmap to another patch (Zhenyu)
v4: refine codes (Zhenyu)
Signed-off-by: Hang Yuan <hang.yuan@linux.intel.com>
Cc: Yan Zhao <yan.y.zhao@intel.com>
Cc: Xiaolin Zhang <xiaolin.zhang@intel.com>
Cc: Zhenyu Wang <zhenyu.z.wang@intel.com>
Reviewed-by: Xiaolin Zhang <xiaolin.zhang@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
When using softpin it's not enough to just pad the vma size, we also
need to ensure the vma offset is at the start of the pt boundary, if we
plan to utilize 64K pages. Therefore to improve test coverage we should
use both aligned and unaligned gtt offsets in igt_write_huge.
Suggested-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20181029203734.21936-1-matthew.auld@intel.com
This reverts commit c9e666880d.
Checked GVT codes that guest PPGTT PTE flag bits are propagated
to shadow PTE. Read/write bit is not changed. Further tested by
i915 self-test case "igt_ctx_readonly". No error or GPU hang was
detected. So enable read-only support under GVT.
Signed-off-by: Hang Yuan <hang.yuan@linux.intel.com>
Acked-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1540883281-11359-1-git-send-email-hang.yuan@linux.intel.com
Acked-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
typing 'make' inside tools/testing/selftests/powerpc gave a build
warning:
BUILD_TARGET=tools/testing/selftests/powerpc/security; mkdir -p $BUILD_TARGET; make OUTPUT=$BUILD_TARGET -k -C security all
make[1]: Entering directory 'tools/testing/selftests/powerpc/security'
../../lib.mk:20: ../../../../scripts/subarch.include: No such file or directory
make[1]: *** No rule to make target '../../../../scripts/subarch.include'.
make[1]: Failed to remake makefile '../../../../scripts/subarch.include'.
The build is one level deeper than lib.mk thinks it is. Set top_srcdir
to set things straight.
Note that the test program is still built.
Signed-off-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
If the clipped dirty region's x/y happened to align to 256, we would
have set the top 8 bits wrong. Noticed by inspection, not by
reproducing a bug.
Signed-off-by: Eric Anholt <eric@anholt.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20181024184313.2967-4-eric@anholt.net
Reviewed-by: Noralf Trønnes <noralf@tronnes.org>
I want to sort out support for tinydrm in vc4, so I needed to get a
tinydrm-appropriate panel working and this is what I had on hand.
This is derived from a combination of ili9341.c from tinydrm and
fb_hx8357d.c from staging's fbtft.
v2: Write my own register defs from the spec to not need the header
from fbtft. Fix spi device string to enable module autoloading.
(Suggestions by Noralf)
Signed-off-by: Eric Anholt <eric@anholt.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20181024184313.2967-3-eric@anholt.net
Reviewed-by: Noralf Trønnes <noralf@tronnes.org> (v1)
This adds a new binding for Himax HX8357D display panels. It includes
a compatible string for one display (more can be added in the future).
The YX350HV15 panel[1] is found in the Adafruit PiTFT 3.5" Touch
Screen for Raspberry Pi.
[1] https://learn.adafruit.com/adafruit-pitft-3-dot-5-touch-screen-for-raspberry-pi/downloads
This binding is closely modeled after the ili9341 binding, for a
similar product from adafruit. The primary difference is that the
hx8357d doesn't have a reset line that I can find in the schematics.
v2: Document the "reg" property (requested by Rob), fix commit message
typo (Noralf)
Signed-off-by: Eric Anholt <eric@anholt.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20181024184313.2967-2-eric@anholt.net
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Noralf Trønnes <noralf@tronnes.org>
We return 0 in the case of a nonblocking socket that has no data
available. However, this is incorrect and may confuse applications.
After this patch we do the correct thing and return the error
EAGAIN.
Quoting return codes from recvmsg manpage,
EAGAIN or EWOULDBLOCK
The socket is marked nonblocking and the receive operation would
block, or a receive timeout had been set and the timeout expired
before data was received.
Fixes: 604326b41a ("bpf, sockmap: convert to generic sk_msg interface")
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
On our test machine, bpf selftest test_flow_dissector.sh failed
with the following error:
# ./test_flow_dissector.sh
bpffs not mounted. Mounting...
libbpf: failed to create map (name: 'jmp_table'): Operation not permitted
libbpf: failed to load object 'bpf_flow.o'
./flow_dissector_load: bpf_prog_load bpf_flow.o
selftests: test_flow_dissector [FAILED]
Let us increase the rlimit to remove the above map
creation failure.
Signed-off-by: Yonghong Song <yhs@fb.com>
Acked-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
The example contains two values for the capacity currently, 446 in text
and 578 in code. The numbers are all correct but can confuse some of the
readers. This patch tries to explain how the numbers are calculated to
avoid same confusion going forward.
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rob Herring <robh@kernel.org>
Tell the version numbers when the pptable versions do not match.
Signed-off-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This patch will work as workaround for silicon limitation
related to PWM dutycycle when the backlight level goes to 0.
Actually PWM value is 16 bit value and valid range from 1-65535.
when ever user requested to set this PWM value to 0 which is not
fall in the range, in VBIOS taken care this by limiting to 1.
This patch here will do the same. Either driver or VBIOS can not
pass 0 value as it is not a valid range for PWM and it will
give a high PWM pulse which is not the intended behaviour as
per HW constraints.
Signed-off-by: suresh guttula <suresh.guttula@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Trivial fix to clean up an indentation issue, remove tabs
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
already supported COPY, by copying a limited amount of data and then
returning a short result, letting the client resend. The asynchronous
protocol should offer better performance at the expense of some
complexity.
The other highlight is Trond's work to convert the duplicate reply cache
to a red-black tree, and to move it and some other server caches to RCU.
(Previously these have meant taking global spinlocks on every RPC.)
Otherwise, some RDMA work and miscellaneous bugfixes.
-----BEGIN PGP SIGNATURE-----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=TTo0
-----END PGP SIGNATURE-----
Merge tag 'nfsd-4.20' of git://linux-nfs.org/~bfields/linux
Pull nfsd updates from Bruce Fields:
"Olga added support for the NFSv4.2 asynchronous copy protocol. We
already supported COPY, by copying a limited amount of data and then
returning a short result, letting the client resend. The asynchronous
protocol should offer better performance at the expense of some
complexity.
The other highlight is Trond's work to convert the duplicate reply
cache to a red-black tree, and to move it and some other server caches
to RCU. (Previously these have meant taking global spinlocks on every
RPC)
Otherwise, some RDMA work and miscellaneous bugfixes"
* tag 'nfsd-4.20' of git://linux-nfs.org/~bfields/linux: (30 commits)
lockd: fix access beyond unterminated strings in prints
nfsd: Fix an Oops in free_session()
nfsd: correctly decrement odstate refcount in error path
svcrdma: Increase the default connection credit limit
svcrdma: Remove try_module_get from backchannel
svcrdma: Remove ->release_rqst call in bc reply handler
svcrdma: Reduce max_send_sges
nfsd: fix fall-through annotations
knfsd: Improve lookup performance in the duplicate reply cache using an rbtree
knfsd: Further simplify the cache lookup
knfsd: Simplify NFS duplicate replay cache
knfsd: Remove dead code from nfsd_cache_lookup
SUNRPC: Simplify TCP receive code
SUNRPC: Replace the cache_detail->hash_lock with a regular spinlock
SUNRPC: Remove non-RCU protected lookup
NFS: Fix up a typo in nfs_dns_ent_put
NFS: Lockless DNS lookups
knfsd: Lockless lookup of NFSv4 identities.
SUNRPC: Lockless server RPCSEC_GSS context lookup
knfsd: Allow lockless lookups of the exports
...
Without this, the xserver relies on what the 3D driver exposes and
assumes that the display can handle it, and then the DRM driver
happily tries to scan out a tiled format.
Signed-off-by: Eric Anholt <eric@anholt.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20181025162635.6689-1-eric@anholt.net
Acked-by: Noralf Trønnes <noralf@tronnes.org>
plus trivial indentation fixes.
-----BEGIN PGP SIGNATURE-----
iQEcBAABAgAGBQJb2KX1AAoJEH9KYoIL9GO3lfcH/R1eClPzhBbOj/MZWgxoB5VN
lsOFl2XYc8bhThxOygqKcLpa2De5Q6ebrvLFgQ43erO7MaXzI4mswM5+azIlLXx3
iVuE1NIYze5g92yvb4mLeDHGVid4EjGoG1tiGRxuU18j02Nze1B7t22tBzcYUCyi
buJfx0A37aMepd/+cy3Qp4G03hgaNMama1220AR0S0kkORIBZFzKQOAKN6r8DGa/
05QhmtJJQsLJJxyLDv6lKmy0Ef42COeDICpYUlQ1LvoxJJBAblDBzlkYl7ulORwV
f147xPV+v/jlE8CktOtN31S8x+XRvbbqm9sKLB0XKnA9vz89WAl1BzoZ/7FZf/Y=
=aGIT
-----END PGP SIGNATURE-----
Merge tag 'cramfs_fixes' of git://git.linaro.org/people/nicolas.pitre/linux
Pull cramfs fixes from Nicolas Pitre:
"Make the Cramfs code more robust against filesystem corruptions, plus
trivial indentation fixes"
* tag 'cramfs_fixes' of git://git.linaro.org/people/nicolas.pitre/linux:
Cramfs: trivial whitespace fixes
Cramfs: fix abad comparison when wrap-arounds occur
The mvpp2 driver has the curious behaviour of passing a stack variable
to irq_set_affinity_hint(), which results in the kernel exploding
the first time anyone accesses this information. News flash: userspace
does, and irqbalance will happily take the machine down. Great stuff.
An easy fix is to track the mask within the queue_vector structure,
and to make sure it has the same lifetime as the interrupt itself.
Fixes: e531f76757 ("net: mvpp2: handle cases where more CPUs are available than s/w threads")
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
It is possible for corrupted filesystem images to produce very large
block offsets that may wrap when a length is added, and wrongly pass
the buffer size test.
Reported-by: Anatoly Trosinenko <anatoly.trosinenko@gmail.com>
Signed-off-by: Nicolas Pitre <nico@linaro.org>
Cc: stable@vger.kernel.org
Abdul Haleem reported a build error on ppc :
drivers/net/ethernet/mellanox/mlx4/en_rx.c:582:18: warning: `struct
iphdr` declared inside parameter list [enabled by default]
struct iphdr *iph)
^
drivers/net/ethernet/mellanox/mlx4/en_rx.c:582:18: warning: its scope is
only this definition or declaration, which is probably not what you want
[enabled by default]
drivers/net/ethernet/mellanox/mlx4/en_rx.c: In function
get_fixed_ipv4_csum:
drivers/net/ethernet/mellanox/mlx4/en_rx.c:586:20: error: dereferencing
pointer to incomplete type
__u8 ipproto = iph->protocol;
^
Fixes: 55469bc6b5 ("drivers: net: remove <net/busy_poll.h> inclusion when not needed")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Abdul Haleem <abdhalee@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
ICL supports DC5, DC6, and DC9. Enable DC9 during screen-off, and enable
DC5/6 when appropriate.
v2: (James Ausmus)
- Also handle ICL as GEN9_LP in i915_drm_suspend_late and
i915_drm_suspend_early
- Add DC9 to gen9_dc_mask for ICL
- Re-order GEN checks for newest platform first
- Use INTEL_GEN instead of INTEL_INFO->gen
- Use INTEL_GEN >= 11 instead of IS_ICELAKE
- Consolidate GEN checks
v3: (James Ausmus)
- Also allow DC6 for ICL (Imre, Art)
- Simplify !(GEN >= 11) to GEN < 11 (Imre)
v4: (James Ausmus)
- Don't call intel_power_sequencer_reset after DC9 for Gen11+, as the
PPS regs are Always On
- Rebase against upstream changes
v5: (Anusha Srivatsa)
- rebased against the latest upstream changes.
v6: (Anusha Srivatsa)
- rebased.Use INTEL_GEN consistently.
- Simplify the code (Rodrigo)
v7: rebased. Change order according to platforms(Jyoti)
v8: rebased. Change the check from platform specific to
HAS_PCH_SPLIT(). Add comment in code to be more clear.(Rodrigo)
Cc: Imre Deak <imre.deak@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Animesh Manna <animesh.manna@intel.com>
Signed-off-by: James Ausmus <james.ausmus@intel.com>
Signed-off-by: Anusha Srivatsa <anusha.srivatsa@intel.com>
Tested-by: Jyoti Yadav <jyoti.r.yadav@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181029221410.4423-1-anusha.srivatsa@intel.com
Back in January I posted patches to create function based events. These were
the events that you suggested I make to allow developers to easily create
events in code where no trace event exists. After posting those changes for
review, it was suggested that we implement this instead with kprobes.
The problem with kprobes is that the interface is too complex and needs to
be simplified. Masami Hiramatsu posted patches in March and I've been
playing with them a bit. There's been a bit of clean up in the kprobe code
that was inspired by the function based event patches, and a couple of
enhancements to the kprobe event interface.
- If the arch supports it (we added support for x86), you can place a
kprobe event at the start of a function and use $arg1, $arg2, etc
to reference the arguments of a function. (Before you needed to know
what register or where on the stack the argument was).
- The second is a way to see array of events. For example, if you reference
a mac address, you can add:
echo 'p:mac ip_rcv perm_addr=+574($arg2):x8[6]' > kprobe_events
And this will produce:
mac: (ip_rcv+0x0/0x140) perm_addr={0x52,0x54,0x0,0xc0,0x76,0xec}
Other changes include
- Exporting trace_dump_stack to modules
- Have the stack tracer trace the entire stack (stop trying to remove
tracing itself, as we keep removing too much).
- Added support for SDT in uprobes
-----BEGIN PGP SIGNATURE-----
iIoEABYIADIWIQRRSw7ePDh/lE+zeZMp5XQQmuv6qgUCW9hdjxQccm9zdGVkdEBn
b29kbWlzLm9yZwAKCRAp5XQQmuv6qmtbAP9GS/o2WSvsYLSIw4+mF94eCL06lUxp
rRrktkEofm/PagEAl2JNmvHrAJN+LIrajqXTbwlZ7Ckk1rZhCW41Am7qnQs=
=sTUM
-----END PGP SIGNATURE-----
Merge tag 'trace-v4.20' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull tracing updates from Steven Rostedt:
"The biggest change here is the updates to kprobes
Back in January I posted patches to create function based events.
These were the events that you suggested I make to allow developers to
easily create events in code where no trace event exists. After
posting those changes for review, it was suggested that we implement
this instead with kprobes.
The problem with kprobes is that the interface is too complex and
needs to be simplified. Masami Hiramatsu posted patches in March and
I've been playing with them a bit. There's been a bit of clean up in
the kprobe code that was inspired by the function based event patches,
and a couple of enhancements to the kprobe event interface.
- If the arch supports it (we added support for x86), you can place a
kprobe event at the start of a function and use $arg1, $arg2, etc
to reference the arguments of a function. (Before you needed to
know what register or where on the stack the argument was).
- The second is a way to see array of events. For example, if you
reference a mac address, you can add:
echo 'p:mac ip_rcv perm_addr=+574($arg2):x8[6]' > kprobe_events
And this will produce:
mac: (ip_rcv+0x0/0x140) perm_addr={0x52,0x54,0x0,0xc0,0x76,0xec}
Other changes include
- Exporting trace_dump_stack to modules
- Have the stack tracer trace the entire stack (stop trying to remove
tracing itself, as we keep removing too much).
- Added support for SDT in uprobes"
[ SDT - "Statically Defined Tracing" are userspace markers for tracing.
Let's not use random TLA's in explanations unless they are fairly
well-established as generic (at least for kernel people) - Linus ]
* tag 'trace-v4.20' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (24 commits)
tracing: Have stack tracer trace full stack
tracing: Export trace_dump_stack to modules
tracing: probeevent: Fix uninitialized used of offset in parse args
tracing/kprobes: Allow kprobe-events to record module symbol
tracing/kprobes: Check the probe on unloaded module correctly
tracing/uprobes: Fix to return -EFAULT if copy_from_user failed
tracing: probeevent: Add $argN for accessing function args
x86: ptrace: Add function argument access API
tracing: probeevent: Add array type support
tracing: probeevent: Add symbol type
tracing: probeevent: Unify fetch_insn processing common part
tracing: probeevent: Append traceprobe_ for exported function
tracing: probeevent: Return consumed bytes of dynamic area
tracing: probeevent: Unify fetch type tables
tracing: probeevent: Introduce new argument fetching code
tracing: probeevent: Remove NOKPROBE_SYMBOL from print functions
tracing: probeevent: Cleanup argument field definition
tracing: probeevent: Cleanup print argument functions
trace_uprobe: support reference counter in fd-based uprobe
perf probe: Support SDT markers having reference counter (semaphore)
...
error return value, and the other is for the self tests.
-----BEGIN PGP SIGNATURE-----
iIoEABYIADIWIQRRSw7ePDh/lE+zeZMp5XQQmuv6qgUCW9hYsBQccm9zdGVkdEBn
b29kbWlzLm9yZwAKCRAp5XQQmuv6qiWPAQCARhYpeiWNHYGAirpI1vxaNHzutZvP
j6eaqRXu0JDfsQD7Bb19KxSHUEaPSpZIo68N5OJkoTv9UxD2KYuRysu4VQ8=
=y1Gc
-----END PGP SIGNATURE-----
Merge tag 'trace-v4.19-rc8-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull tracing fixes from Steven Rostedt:
"Masami had a couple more fixes to the synthetic events. One was a
proper error return value, and the other is for the self tests"
* tag 'trace-v4.19-rc8-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
selftests/ftrace: Fix synthetic event test to delete event correctly
tracing: Return -ENOENT if there is no target synthetic event
-----BEGIN PGP SIGNATURE-----
iHUEABYIAB0WIQRTLbB6QfY48x44uB6AXGG7T9hjvgUCW9gK6gAKCRCAXGG7T9hj
vvrrAP42oa7I9lPFNhN4UA7tb26G7r5u3eL6icbeFOhbWaic1AD+IEXJjF0x6rOc
cbqIBv+dL7FXpfPkgaMuoRdIKsd0zgs=
=DsRi
-----END PGP SIGNATURE-----
Merge tag 'for-linus-4.20a-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Pull xen fixes from Juergen Gross:
"Only several small fixes and cleanups this time"
* tag 'for-linus-4.20a-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
xen: drop writing error messages to xenstore
xen/pvh: don't try to unplug emulated devices
add myself as reviewer for Xen support in Linux
xen: remove redundant 'default n' from Kconfig
xen/balloon: Support xend-based toolstack
xen/pvh: increase early stack size
xen: make xen_qlock_wait() nestable
xen: fix race in xen_qlock_wait()
xen/balloon: Grammar s/Is it/It is/
xen: Make XEN_BACKEND selectable by DomU
Rework the handling of the P-unit semaphore on Intel Baytrail and
Cherrytrail systems to avoid race conditions and excessive overhead
related to it (Hans de Goede).
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2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=4oYh
-----END PGP SIGNATURE-----
Merge tag 'acpi-4.20-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull more ACPI updates from Rafael Wysocki:
"Rework the handling of the P-unit semaphore on Intel Baytrail and
Cherrytrail systems to avoid race conditions and excessive overhead
related to it (Hans de Goede)"
* tag 'acpi-4.20-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
ACPI / PMIC: xpower: Add depends on IOSF_MBI to Kconfig entry
i2c: designware: Cleanup bus lock handling
ACPI / PMIC: xpower: Block P-Unit I2C access during read-modify-write
x86: baytrail/cherrytrail: Rework and move P-Unit PMIC bus semaphore code