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Using '${?}' inside the if-statement to check the returned value from
the command that was evaluated as part of the if-statement is not
correct: here, '${?}' will be linked to the previous instruction, not
the one that is expected here (${cmd}).
Instead, simply mark the error, except if an error is expected. If
that's the case, 1 can be passed as the 4th argument of this helper.
Three checks from pm_netlink.sh expect an error.
While at it, improve the error message when the command unexpectedly
fails or succeeds.
Note that we could expect a specific returned value, but the checks
currently expecting an error can be used with 'ip mptcp' or 'pm_nl_ctl',
and these two tools don't return the same error code.
Fixes: 2d0c1d27ea4e ("selftests: mptcp: add mptcp_lib_check_output helper")
Cc: stable@vger.kernel.org
Reviewed-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Link: https://patch.msgid.link/20260505-net-mptcp-pm-fixes-7-1-rc3-v1-10-fca8091060a4@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Recent changes added configs and tests in the wrong spot.
Link: https://lore.kernel.org/20260506170435.34984dfc@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec
Steffen Klassert says:
====================
pull request (net): ipsec 2026-05-05
1. Fix an IPv6 encapsulation error path that leaked route references
when UDPv6 ESP decapsulation resolved to an error route.
From Yilin Zhu.
2. Fix AH with ESN on async crypto paths by accounting for the extra
high-order sequence number when reconstructing the temporary
authentication layout in the completion callbacks.
From Michael Bomarito.
3. Fix XFRM output so it does not overwrite already-correct inner header
pointers when a tunnel layer such as VXLAN has already saved them.
The fix comes with new selftests. From Cosmin Ratiu.
4. Add the missing native payload size entry for XFRM_MSG_MAPPING in the
compat translation path. From Ruijie Li.
5. Harden __xfrm_state_delete() against repeated or inconsistent unhashing
of state list nodes by keying the removal on actual list membership and
using delete-and-init helpers. From Michal Kosiorek.
6. Prevent ESP from decrypting shared splice-backed skb fragments in place
by marking UDP splice frags as shared and forcing copy-on-write in ESP
input when needed. From Kuan-Ting Chen.
* tag 'ipsec-2026-05-05' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec:
xfrm: esp: avoid in-place decrypt on shared skb frags
xfrm: defensively unhash xfrm_state lists in __xfrm_state_delete
xfrm: provide message size for XFRM_MSG_MAPPING
xfrm: Don't clobber inner headers when already set
tools/selftests: Add a VXLAN+IPsec traffic test
tools/selftests: Use a sensible timeout value for iperf3 client
xfrm: ah: account for ESN high bits in async callbacks
ipv6: xfrm6: release dst on error in xfrm6_rcv_encap()
====================
Link: https://patch.msgid.link/20260505132326.1362733-1-steffen.klassert@secunet.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Antonio Quartulli says:
====================
Includes changes:
* ensure MAC header offset is reset before delivering packet
* ensure gro_cells_receive() and dstats_dev_add() are called
with BH disabled
* reduce ping count in selftest to ensure it completes within
timeout
* tag 'ovpn-net-20260504' of https://github.com/OpenVPN/ovpn-net-next:
selftests: ovpn: reduce ping count in test.sh
ovpn: ensure packet delivery happens with BH disabled
ovpn: reset MAC header before passing skb up
====================
Link: https://patch.msgid.link/20260504230305.2681646-1-antonio@openvpn.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Fix the following failure to the steal_time test on arm64 by making
the timer address known to the guest.
==== Test Assertion Failure ====
steal_time.c:229: !ret
pid=18514 tid=18514 errno=22 - Invalid argument
1 0x000000000040252f: check_steal_time_uapi at steal_time.c:229 (discriminator 20)
2 (inlined by) main at steal_time.c:537 (discriminator 20)
3 0x0000ffffa23d621b: ?? ??:0
4 0x0000ffffa23d62fb: ?? ??:0
5 0x0000000000402b6f: _start at ??:?
KVM_SET_DEVICE_ATTR failed, rc: -1 errno: 22 (Invalid argument)
Fixes: 40351ed924dd ("KVM: selftests: Refactor UAPI tests into dedicated function")
Signed-off-by: Sebastian Ott <sebott@redhat.com>
Link: https://patch.msgid.link/20260504112808.21276-1-sebott@redhat.com
Signed-off-by: Marc Zyngier <maz@kernel.org>
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Update the selftests so they are executed for legacy (32 bytes RSEQ region)
and optimized RSEQ ABI v2 mode.
Fixes: d6200245c75e ("rseq: Allow registering RSEQ with slice extension")
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Dmitry Vyukov <dvyukov@google.com>
Tested-by: Dmitry Vyukov <dvyukov@google.com>
Link: https://patch.msgid.link/20260428224428.009121296%40kernel.org
Cc: stable@vger.kernel.org
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The RSEQ legacy mode behavior requires that the ID fields in the rseq
region are unconditionally updated on every context switch and before
signal delivery even if not required by the ABI specification.
To ensure that this behavior is preserved for legacy users in the future,
add a test which validates that with a sleep() and a signal sent to self.
Provide a run script which prevents GLIBC from registering a RSEQ region,
so that the test can register it's own legacy sized region.
Fixes: 566d8015f7ee ("rseq: Avoid CPU/MM CID updates when no event pending")
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Dmitry Vyukov <dvyukov@google.com>
Tested-by: Dmitry Vyukov <dvyukov@google.com>
Link: https://patch.msgid.link/20260428224427.764705536%40kernel.org
Cc: stable@vger.kernel.org
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The commit 3dae09de4061 ("livepatch: Add stack_order sysfs attribute"),
merged in v6.14, introduced a new sysfs attribute.
In order to run the selftests on older kernels, check if given kernel
has support for the attribute. If the attribute is not supported, skip
the checks.
Signed-off-by: Marcos Paulo de Souza <mpdesouza@suse.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Acked-by: Joe Lawrence <joe.lawrence@redhat.com>
Link: https://patch.msgid.link/20260504-lp-tests-old-fixes-v5-6-0be26d94ab9a@suse.com
Signed-off-by: Petr Mladek <pmladek@suse.com>
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The commit adb68ed26a3e ("livepatch: Add "replace" sysfs attribute"),
merged in v6.11, introduced a new sysfs attribute.
In order to run the selftests on older kernels, check if given kernel
has support for the attribute. If the attribute is not supported, skip
the checks.
While at it, create a local variable to hold the module name to be
tested, instead of overwriting MOD_LIVEPATCH.
Signed-off-by: Marcos Paulo de Souza <mpdesouza@suse.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Acked-by: Joe Lawrence <joe.lawrence@redhat.com>
Link: https://patch.msgid.link/20260504-lp-tests-old-fixes-v5-5-0be26d94ab9a@suse.com
Signed-off-by: Petr Mladek <pmladek@suse.com>
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The commit bb26cfd9e77e
("livepatch: add sysfs entry "patched" for each klp_object") was merged
in v6.1, introducing a new sysfs attribute.
In order to run the selftests on older kernels, check if given kernel
has support for the attribute. If the attribute is not supported, skip
the checks.
Along with this change, use MOD_LIVEPATCH2 variable instead of
reassigning a new value to MOD_LIVEPATCH, and also use the variable
names in the check_result, to avoid using the module names.
Signed-off-by: Marcos Paulo de Souza <mpdesouza@suse.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Acked-by: Joe Lawrence <joe.lawrence@redhat.com>
Link: https://patch.msgid.link/20260504-lp-tests-old-fixes-v5-4-0be26d94ab9a@suse.com
Signed-off-by: Petr Mladek <pmladek@suse.com>
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Returns true if the livepatch sysfs attribute exists, and false otherwise.
This new function will be used in the next patches.
Signed-off-by: Marcos Paulo de Souza <mpdesouza@suse.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Acked-by: Joe Lawrence <joe.lawrence@redhat.com>
Link: https://patch.msgid.link/20260504-lp-tests-old-fixes-v5-3-0be26d94ab9a@suse.com
Signed-off-by: Petr Mladek <pmladek@suse.com>
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Older kernels don't support true/false for boolean module parameters
because they lack commit 0d6ea3ac94ca
("lib/kstrtox.c: add "false"/"true" support to kstrtobool()"). Replace
true/false by y/n so the test module can be loaded on older kernels.
No functional changes.
Signed-off-by: Marcos Paulo de Souza <mpdesouza@suse.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Acked-by: Joe Lawrence <joe.lawrence@redhat.com>
Link: https://patch.msgid.link/20260504-lp-tests-old-fixes-v5-2-0be26d94ab9a@suse.com
Signed-off-by: Petr Mladek <pmladek@suse.com>
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Older kernels that lack CONFIG_ARCH_HAS_SYSCALL_WRAPPER config don't
have any prefixes for their syscalls. The same applies to current
powerpc and loongarch, covering all currently supported architectures
that support livepatch.
The other supported architectures have specific prefixes, so error out
when a new architecture adds livepatch support with wrappers but didn't
update the test to include it.
Signed-off-by: Marcos Paulo de Souza <mpdesouza@suse.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Acked-by: Joe Lawrence <joe.lawrence@redhat.com>
Link: https://patch.msgid.link/20260504-lp-tests-old-fixes-v5-1-0be26d94ab9a@suse.com
Signed-off-by: Petr Mladek <pmladek@suse.com>
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It was reported that the posix_timers test was at times seeing failures
with ITIMER_PROF timers, specifically in cases where the RCU_SOFTIRQ was
taking up significant amounts of time.
Analysis showed that as the time in softirq isn't included in the task
stime + utime accounting used to trigger the SIGPROF so delays from softirq
work could cause it to appear that the signal was incorrectly delayed.
Contributing to this is that the test uses gettimeofday() to measure
itimers, which also means any scheduling delay can also cause failures (as
the task may not be running the entire time).
To fix this, convert all the itimer measurements to use clock_gettime(),
tweaking the logic to use nsecs instead of usecs. Then for ITIMER_PROF
timers, utilize the CLOCK_THREAD_CPUTIME_ID clockid so that it is similarly
measuring the time the task was running.
Signed-off-by: John Stultz <jstultz@google.com>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Link: https://patch.msgid.link/20260428173957.1394265-1-jstultz@google.com
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This patch updates the rds selftests output to be TAP compliant.
Use ksft_pr() to mark debug output with a leading '# ' so that TAP
parsers treat it as commentary, and convert all informational print()
calls to use ksft_pr(). sys.exit(0) is changed to os._exit(0) to
avoid duplicate prints from the buffered TAP output. The console
output from the tcpdump subprocess is silenced, and the gcov console
output is redirected to a gcovr.log.
Finally adjust the exit path so that the hash check loop sets a
return code instead exiting directly. Then print the TAP results
and totals lines before exiting.
Signed-off-by: Allison Henderson <achender@kernel.org>
Link: https://patch.msgid.link/20260504054143.4027538-11-achender@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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debugfs is not mounted automatically in a virtme-ng guest, so the
gcov data copy from /sys/kernel/debug/gcov/ silently finds nothing
depending on whether debugfs is mounted by default on the host OS.
Fix this by mounting debugfs in run.sh before copying the gcda
files.
Finally when invoked through the kselftest runner, the working
directory is the test directory rather than the kernel source root.
gcovr defaults --root to the current working directory, which causes
it to filter out all coverage data for files under net/rds/ since
they are not under the test directory. Fix this by passing --root
to gcovr explicitly.
Signed-off-by: Allison Henderson <achender@kernel.org>
Link: https://patch.msgid.link/20260504054143.4027538-10-achender@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The timeout signal handler for the rds selftests currently just
exits when the time limit is exceeded, and forgets to stop the
network dumps. Fix this by hoisting the tcpdump terminate commands
into a helper function, and call it from the signal handler before
exiting
Bound proc.wait() with a timeout (and fall back to proc.kill())
so an unresponsive tcpdump cannot hang the timeout path itself.
We also pop() tcpdump_procs as we iterate, so stop_pcaps() is safe
to call from both the normal cleanup path and the signal handler,
since the second invocation simply has nothing to do
Signed-off-by: Allison Henderson <achender@kernel.org>
Link: https://patch.msgid.link/20260504054143.4027538-9-achender@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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This patch removes the initial tmp tcpdumps and instead saves
the pcaps directly to the logdir if it is set.
Signed-off-by: Allison Henderson <achender@kernel.org>
Link: https://patch.msgid.link/20260504054143.4027538-8-achender@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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This patch modifies rds selftests to use the environment variable
SUDO_USER for tcpdumps if it is set. This is needed to avoid chown
operations on the vng 9pfs which is not supported. Passing a user
listed in sudoers avoids the tcpdump privilege drop which may
otherwise create empty pcaps
Signed-off-by: Allison Henderson <achender@kernel.org>
Link: https://patch.msgid.link/20260504054143.4027538-7-achender@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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This patch modifies the rds selftest to look for an env variable
RDS_LOG_DIR, and log all traces, pcaps and gcov collections to
the folder specified in RDS_LOG_DIR. If RDS_LOG_DIR is unset,
logs are not collected.
Signed-off-by: Allison Henderson <achender@kernel.org>
Link: https://patch.msgid.link/20260504054143.4027538-6-achender@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Add a -t flag to run.sh to optionally override the default
timeout. The --timeout flag is already supported in test.py,
so just add the shorthand -t flag
Signed-off-by: Allison Henderson <achender@kernel.org>
Link: https://patch.msgid.link/20260504054143.4027538-5-achender@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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This patch fixes a few pylint errors in test.py. Remove unused exception
variables from except blocks, and disable warnings for imports that cannot
appear at the start of the module. Also disable warnings for the
tcpdump processes. The suggestion to use a with block does not apply
here since the process needs to outlive the parent to collect the dumps.
Lastly add the module docstring at the top of the module.
Signed-off-by: Allison Henderson <achender@kernel.org>
Link: https://patch.msgid.link/20260504054143.4027538-4-achender@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The run.sh script does not have a -g flag. Update USAGE string with
correct flags. Also fix typo packet_duplcate -> packet_duplicate
Signed-off-by: Allison Henderson <achender@kernel.org>
Link: https://patch.msgid.link/20260504054143.4027538-3-achender@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The 400s time out was originally developed under a leaner
kernel config that booted much faster than a default config.
Boot up is included as part of the over all test runtime, as
well as any log collection done when the test is complete.
A slower config combined with the gcov enabled test means
we'll need more time to accommodate the boot up and log
collection. So, bump time out to 800s.
Signed-off-by: Allison Henderson <achender@kernel.org>
Link: https://patch.msgid.link/20260504054143.4027538-2-achender@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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In preparation for extending to pacing hardware offload, convert the
so_txtime.sh test to a drv-net test that can be run against netdevsim
and real hardware.
Also update so_txtime.c to not exit on first failure, but run to
completion and report exit code there. This helps with debugging
unexpected results, especially when processing multiple packets,
as happens in the "reverse_order" testcase.
Signed-off-by: Willem de Bruijn <willemb@google.com>
----
v6 -> v7
- update test to use new argument expect_fail
- v6 received Reviewed-by, but dropped due to above (minor) change
v5 -> v6
- fix order in tools/testing/selftests/drivers/net/config
v4 -> v5
- move qdisc setup/restore into each test
- add tc to utils.py (separate patch)
- test expected failure (separate patch)
- fix pylint
- convert fail to pass for timing errors if KSFT_MACHINE_SLOW
(cmd does not special case KSFT_SKIP process returncode yet)
Responses to sashiko review
- The test converts per packet failure to errors, to continue
testing other packets, but other error() cases are not in scope.
- The test starts sender and receiver at an absolute future time,
like the original test. This assumes ~msec scale sync'ed clocks.
- The tc qdisc replace command works fine with noqueue. Tested
manually.
v3 -> v4
- restore original qdisc after test
- drop unnecessary underscore in tap test names
v2 -> v3
- Makefile: so_txtime from YNL_GEN_FILES to TEST_GEN_FILES (Sashiko, NIPA)
v1 -> v2
- move so_txtime.c for net/lib to drivers/net (Jakub)
- fix drivers/net/config order (Jakub)
- detect passing when failure is expected (Jakub, Sashiko)
- pass pylint --disable=R (Jakub)
- only call ksft_run once (Jakub)
- do not sleep if waiting time is negative (Sashiko)
- add \n when converting error() to fprintf() (Sashiko)
- 4 space indentation, instead of 2 space
- increase sync delay from 100 to 200ms, to fix rare vng flakes
Link: https://patch.msgid.link/20260504174056.565319-4-willemdebruijn.kernel@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Add a wrapper similar to existing ip, ethtool, ... commands.
Tc takes a slightly different syntax. Account for that.
The first user is the next patch in this series, converting so_txtime
to drv-net. Pacing offload is supported by selected qdiscs only.
Signed-off-by: Willem de Bruijn <willemb@google.com>
Link: https://patch.msgid.link/20260504174056.565319-3-willemdebruijn.kernel@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Support negative tests, where cmd raises an exception if the command
succeeded.
Add optional argument expect_fail to cmd and bkg. Where fail fails the
test on unexpected error, expect_fail fails it on unexpected success.
Both fail on negative return code. Python subprocess may set a
negative return code on process crash or timeout. Those are never
anticipated failures.
Signed-off-by: Willem de Bruijn <willemb@google.com>
Link: https://patch.msgid.link/20260504174056.565319-2-willemdebruijn.kernel@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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4751bddd3f983af2 ("perf tools: Make GTK2 support opt-in") changed GTK2
build to be opt-in.
So NO_GTK2 is meaningless and we need to pass GTK2=1 to enable it.
Let's update the build-test configuration for that.
Also make_no_ui is the same as make_no_slang since NO_GTK2 is no-op.
Let's get rid of it as well.
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: James Clark <james.clark@linaro.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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On my system, `make GEN_VMLINUX_H=1` fails with a lot of error messages
like below:
./util/bpf_skel/vmlinux.h:134488:4: error: declaration does not declare anything [-Werror,-Wmissing-declarations]
134488 | struct freelist_counters;
| ^~~~~~~~~~~~~~~~~~~~~~~~
make[2]: *** [Makefile.perf:1249: linux/tools/perf/util/bpf_skel/.tmp/lock_contention.bpf.o] Error 1
I saw commit 835a50753579a ("selftests/bpf: Add -fms-extensions to bpf
build flags") also added the same flags to bpf programs.
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: James Clark <james.clark@linaro.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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It should say binutils-dev(el) instead of plain binutils package as it's
mostly installed already and can confuse people like me. :)
Reviewed-by: Ian Rogers <irogers@google.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: James Clark <james.clark@linaro.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Any IMPDEF events not printed out from a known core's IMPDEF list or for
a completely unknown core will still not be shown to the user. Fix this
by printing the remaining bits as comma separated raw numbers, e.g.
"IMPDEF:1,2,3,4".
Suggested-by: Al Grant <al.grant@arm.com>
Reviewed-by: Leo Yan <leo.yan@arm.com>
Signed-off-by: James Clark <james.clark@linaro.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Leo Yan <leo.yan@linux.dev>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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>From the TRM [1], N1 has one IMPDEF event which isn't covered by the
common list. Add a framework so that more cores can be added in the
future and that the N1 IMPDEF event can be decoded. Also increase the
size of the buffer because we're adding more strings and if it gets
truncated it falls back to a hex dump only.
[1]: https://developer.arm.com/documentation/100616/0401/Statistical-Profiling-Extension/implementation-defined-features-of-SPE
Suggested-by: Al Grant <al.grant@arm.com>
Reviewed-by: Leo Yan <leo.yan@arm.com>
Signed-off-by: James Clark <james.clark@linaro.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Leo Yan <leo.yan@linux.dev>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org
Link: https://developer.arm.com/documentation/100616/0401/Statistical-Profiling-Extension/implementation-defined-features-of-SPE
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
This is so we can have a single function that prints events and can be
used with multiple mappings from different CPUs. Remove any bit that was
printed so that later we can print out the remaining unknown impdef
bits.
No functional changes intended.
Reviewed-by: Leo Yan <leo.yan@arm.com>
Signed-off-by: James Clark <james.clark@linaro.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Leo Yan <leo.yan@linux.dev>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
The MIDR will affect printing of arm_spe_pkts, so store a copy of it
there. Technically it's constant for each decoder, but there is no
decoder when doing a raw dump, so it has to be stored in every packet.
It will only be used in raw dump mode and not in normal decoding for
now, but to avoid any surprises, set MIDR properly on the decoder too.
Having both the MIDR and the arm_spe_pkt (which has a copy of it) in the
decoder seemed a bit weird, so remove arm_spe_pkt from the decoder. The
packet is only short lived anyway so probably shouldn't have been there
in the first place.
Reviewed-by: Leo Yan <leo.yan@arm.com>
Signed-off-by: James Clark <james.clark@linaro.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Leo Yan <leo.yan@linux.dev>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
Don't call strtol() with a null pointer to avoid undefined behavior.
I'm not sure of the exact scenario for missing CPU IDs but I don't think
it happens in practice. SPE decoding can continue without them with
reduced functionality, but print an error message anyway.
Reviewed-by: Leo Yan <leo.yan@arm.com>
Signed-off-by: James Clark <james.clark@linaro.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Leo Yan <leo.yan@linux.dev>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
We'll need the MIDR to dump IMPDEF events in the next commits so extract
a function for it.
No functional changes intended.
Reviewed-by: Leo Yan <leo.yan@arm.com>
Signed-off-by: James Clark <james.clark@linaro.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Leo Yan <leo.yan@linux.dev>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
perf test 'perf inject to convert DWARF callchains to regular ones'
fails on s390. It was introduced with commit 92ea788d2af4e65a ("perf
inject: Add --convert-callchain option")
The failure comes the difference in output. Without the inject script to
convert DWARF the callchains is:
# perf record -F 999 --call-graph dwarf -- perf test -w noploop
# perf report -i perf.data --stdio --no-children -q \
--percent-limit=1 > /tmp/111
# cat /tmp/111
99.30% perf-noploop perf [.] noploop
|
---noploop
run_workload (inlined)
cmd_test
run_builtin (inlined)
handle_internal_command
run_argv (inlined)
main
__libc_start_call_main
__libc_start_main_impl (inlined)
_start
#
With the inject script step the output is:
# perf inject -i perf.data --convert-callchain -o /tmp/perf-inject-1.out
# perf report -i /tmp/perf-inject-1.out --stdio --no-children -q \
--percent-limit=1 > /tmp/222
# cat /tmp/222
99.40% perf-noploop perf [.] noploop
|
---noploop
run_workload (inlined)
cmd_test
run_builtin (inlined)
handle_internal_command
run_argv (inlined)
main
_start
# diff /tmp/111 /tmp/222
1c1
< 99.30% perf-noploop perf [.] noploop
---
> 99.40% perf-noploop perf [.] noploop
10,11d9
< __libc_start_call_main
< __libc_start_main_impl (inlined)
#
The difference are the symbols __libc_start_call_main and
__libc_start_main_impl.
On x86_64, kernel and user space share a single virtual address space,
with the kernel mapped to the upper end of memory. The instruction
pointer value alone is sufficient to distinguish between user space and
kernel space addresses.
This is not true for s390, which uses separate address spaces for user
and kernel.
The same virtual address can be valid in both address spaces, so the
instruction pointer value alone cannot determine whether an address
belongs to the kernel or user space.
Instead, perf must rely on the cpumode metadata derived from the
processor status word (PSW) at sample time.
In function perf_event__convert_sample_callchain() the first part
copies a kernel callchain and context entries, if any.
It then appends additional entries ignoring the address space
architecture. Taking that into account, the symbols at addresses
0x3ff970348cb __libc_start_call_main
0x3ff970349c5 __libc_start_main_impl
(located after the kernel address space on s390) are now included.
Output before:
# perf test 83
83: perf inject to convert DWARF callchains to regular ones : FAILED!
Output after:
# perf test 83
83: perf inject to convert DWARF callchains to regular ones : Ok
Question to Namhyung:
In function perf_event__convert_sample_callchain() just before the
for() loop this patch modifies, the kernel callchain is copied,
see this comment and the next 5 lines:
/* copy kernel callchain and context entries */
Then why is machine__kernel_ip() needed in the for() loop, when
the kernel entries have been copied just before the loop?
Note: This patch was tested on x86_64 virtual machine and succeeded.
Fixes: 92ea788d2af4e65a ("perf inject: Add --convert-callchain option")
Signed-off-by: Thomas Richter <tmricht@linux.ibm.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Jan Polensky <japo@linux.ibm.com>
Cc: linux-s390@vger.kernel.org
Cc: Sumanth Korikkar <sumanthk@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
Check return value of `dwfl_report_end` during offline initialization.
Validate `dwfl_module_relocation_info` result before passing to `strcmp`
to avoid potential segmentation faults.
Additionally:
- Fix a file descriptor leak in `debuginfo__init_offline_dwarf()` when
`dwfl_report_offline()` or subsequent setup calls fail.
Fixes: 6f1b6291cf73cb32 ("perf tools: Add util/debuginfo.[ch] files")
Assisted-by: Gemini-CLI:Google Gemini 3
Signed-off-by: Ian Rogers <irogers@google.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Zecheng Li <zli94@ncsu.edu>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
Check return values of `dwarf_aggregate_size` and `dwarf_formudata`.
Additionally:
- Avoid `vfprintf` undefined behavior with `NULL` strings by using
the `die_name()` helper for `dwarf_diename()` in `pr_*` calls.
- Use `die_get_data_member_location()` (updated to use
`dwarf_attr_integrate`) to correctly parse location expressions
for inherited member locations in the fallback path when
`dwarf_formudata()` fails.
Fixes: 2bc3cf575a162a2c ("perf annotate-data: Improve debug message with location info")
Fixes: 4a111cadac85362e ("perf annotate-data: Add member field in the data type")
Fixes: 8b1042c425f6a5a9 ("perf annotate-data: Set bitfield member offset and size properly")
Fixes: fc044c53b99fad03 ("perf annotate-data: Add dso->data_types tree")
Assisted-by: Gemini-CLI:Google Gemini 3
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Zecheng Li <zli94@ncsu.edu>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
Check return values of `dwarf_formsdata`, `dwarf_entrypc`,
`dwarf_highpc`, `dwarf_bytesize`, `dwarf_attr`, `dwarf_decl_line`,
`dwarf_getfuncs`, and `dwarf_formref_die`. Validate `dwarf_diename` and
`dwarf_diecu` results to prevent potential crashes. Fix C90 mixed
declarations.
Additionally:
- Avoid vfprintf undefined behavior with NULL strings by using the
`die_name()` helper for `dwarf_diename()` in `pr_*` calls,
including when warning about tail calls.
- Prevent NULL pointer dereference in `convert_variable_fields()`
when processing array elements for variables in registers.
- Fallback to offset 0 in `line_range_search_cb()` instead of
skipping functions without `DW_AT_decl_line`.
- Relax `dwarf_getfuncs` error checking in
`find_probe_point_by_func()` and `find_line_range_by_func()` to
prevent premature CU search aborts, ensuring robustness against
corrupted CUs.
Fixes: 66f69b2197167cb9 ("perf probe: Support DW_AT_const_value constant value")
Fixes: 3d918a12a1b3088a ("perf probe: Find fentry mcount fuzzed parameter location")
Fixes: bcfc082150c6b1e9 ("perf probe: Remove redundant dwarf functions")
Fixes: 221d061182b8ff55 ("perf probe: Fix to search local variables in appropriate scope")
Fixes: b55a87ade3839c33 ("perf probe: Remove die() from probe-finder code")
Fixes: 4c859351226c920b ("perf probe: Support glob wildcards for function name")
Assisted-by: Gemini-CLI:Google Gemini 3
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Zecheng Li <zli94@ncsu.edu>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
Check return values of `dwfl_report_end` and `dwfl_module_addrdie`
to prevent using uninitialized stack variables or reporting success on
failure.
Additionally:
- Ensure `*file` is freed and inline frames are cleared on error in
`libdw__addr2line()` to prevent memory leaks and duplicated
callchains when falling back to other unwinders.
- Use `die_name()` safe wrapper inside the inline function unwinding
callback (`libdw_a2l_cb`).
- Refactor `libdw_a2l_cb`'s repeated memory error handling/cleanup
paths using a cleaner goto control flow.
Fixes: b7a2b011e9627ff3 ("perf powerpc: Unify the skip-callchain-idx libdw with that for addr2line")
Fixes: 88c51002d06f9a68 ("perf addr2line: Add a libdw implementation")
Assisted-by: Gemini-CLI:Google Gemini 3
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Zecheng Li <zli94@ncsu.edu>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
Allow DWARF line 0 in `libdw_a2l_cb()`, as it is a valid
reference for compiler-generated code.
Filter `die_get_call_lineno` error codes (negative values), but
fallback to line 0 if `call_fname` is present to preserve the
caller's filename instead of discarding it entirely.
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Zecheng Li <zli94@ncsu.edu>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
Fix the parent srcline lookup in `libdw_a2l_cb()` to target the
correct parent node depending on the callchain order
(ORDER_CALLER/ORDER_CALLEE).
This ensures inline callchains are not corrupted when nest depth > 2.
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Zecheng Li <zli94@ncsu.edu>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
Introduce inline_node__clear_frames() to clean up partial allocations.
This is a prerequisite for error handling in libdw inline unwinding.
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Zecheng Li <zli94@ncsu.edu>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
Check return values of `dwarf_decl_line` (where non-optional),
`dwarf_getfuncs`, and `dwarf_lineaddr` to prevent using uninitialized
stack variables or incorrectly reporting success on failure.
For the root DIE in `die_walk_lines()`, `dwarf_decl_line` and
`die_get_decl_file` are optional and their failures are handled
gracefully to avoid breaking line walking on valid functions.
Specifically, remove the strict `!decf` (declared file) check that
would prematurely abort line walking on generated or artificial
functions lacking this optional attribute.
Additionally:
- Add NULL pointer protection for `strcmp()` in `die_walk_lines()`
when `inf` or `decf` are NULL to prevent crashes on generated
code.
- Use `dwarf_attr_integrate` in `die_get_data_member_location` to
correctly resolve inherited member locations (e.g. via abstract
origin or specification).
Fixes: 57f95bf5f882 ("perf probe: Show correct statement line number by perf probe -l")
Fixes: 3f4460a28fb2 ("perf probe: Filter out redundant inline-instances")
Fixes: 75186a9b09e4 ("perf probe: Fix to show lines of sys_ functions correctly")
Fixes: e0d153c69040 ("perf-probe: Move dwarf library routines to dwarf-aux.{c, h}")
Fixes: 6243b9dc4c99 ("perf probe: Move dwarf specific functions to dwarf-aux.c")
Assisted-by: Gemini-CLI:Google Gemini 3
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Zecheng Li <zli94@ncsu.edu>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
A segmentation fault was observed in `libdw` when running `perf kmem`
with `--page stat` on some workloads. The crash occurred deep inside
`libdw` (specifically in `dwarf_child` and `dwarf_diename`) when
processing DWARF information.
The root cause was improper error handling of `dwarf_getfuncs` in
`die_find_realfunc` and `die_find_tailfunc`.
`dwarf_getfuncs` returns:
- `0` on success (when all functions have been processed).
- A positive offset if the callback aborts early (e.g., via
`DWARF_CB_ABORT` when a match is found).
- `-1` on error.
The original code used `if (!dwarf_getfuncs(...)) return NULL;`. On
error (`-1`), `!-1` evaluates to `0` (false), bypassing the error
check. Execution then proceeded as if a match was found, returning
uninitialized stack memory (`die_mem`) to the caller
(`cu_walk_functions_at`). When `cu_walk_functions_at` passed this
uninitialized memory to `libdw` via `dwarf_diename`, it caused a
segmentation fault.
Fix this by correcting the error check to `if (dwarf_getfuncs(...) <= 0)`.
Fixes: e0d153c69040 ("perf-probe: Move dwarf library routines to dwarf-aux.{c, h}")
Fixes: d4c537e6bf86 ("perf probe: Ignore tail calls to probed functions")
Assisted-by: Gemini-CLI:Google Gemini 3
Signed-off-by: Ian Rogers <irogers@google.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Zecheng Li <zli94@ncsu.edu>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
|
|
Fix documentation to reference ksft_test_result_report() instead of
ksft_test_result().
Link: https://lore.kernel.org/r/20260505182213.22924-1-woradorn.laon@gmail.com
Signed-off-by: Woradorn Laodhanadhaworn <woradorn.laon@gmail.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
|
|
rseq_register_current_thread() either uses the glibc registered RSEQ region
or registers it's own region with the legacy size of 32 bytes.
That worked so far, but becomes a problem when the kernel implements a
distinction between legacy and performance optimized behavior based on the
registration size as that does not allow to test both modes with the self
test suite.
Add two arguments to the function. One to enforce that the registration is
not using libc provided mode and one to tell the registration to use the
legacy size and not the kernel advertised size.
Rename it and make the original one a inline wrapper which preserves the
existing behavior.
Fixes: 566d8015f7ee ("rseq: Avoid CPU/MM CID updates when no event pending")
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Dmitry Vyukov <dvyukov@google.com>
Tested-by: Dmitry Vyukov <dvyukov@google.com>
Link: https://patch.msgid.link/20260428224427.677889423%40kernel.org
Cc: stable@vger.kernel.org
|
|
Don't fail, skip the test if the extensions are not enabled at compile or
runtime.
Fixes: 830969e7821a ("selftests/rseq: Implement time slice extension test")
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Dmitry Vyukov <dvyukov@google.com>
Tested-by: Dmitry Vyukov <dvyukov@google.com>
Link: https://patch.msgid.link/20260428224427.597838491%40kernel.org
Cc: stable@vger.kernel.org
|
|
There were a few issues found with the tunnel vport types around the
vport destruction code. Add some basic tests, so at least we know that
they can be properly added and removed without obvious issues.
The test creates OVS datapath, adds a non-LWT tunnel port, makes sure
they are created, and then removes the datapath and waits for all the
ports to be gone.
The dpctl script had a few bugs in the none-lwt tunnel creation code,
so fixing them as well to make the testing possible:
- The type of the --lwt option changed in order to properly disable it.
- Removed byte order conversion for the port numbers, as the value
supposed to be in the host order.
- Added missing 'gre' choice for the tunnel type.
Signed-off-by: Ilya Maximets <i.maximets@ovn.org>
Acked-by: Eelco Chaudron <echaudro@redhat.com>
Acked-by: Aaron Conole <aconole@redhat.com>
Link: https://patch.msgid.link/20260430233848.440994-3-i.maximets@ovn.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
|
