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Sometimes counters return junk.
For the cases where values > 100% is invalid, print "nan".
Signed-off-by: Len Brown <len.brown@intel.com>
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VMWARE correctly enumerates lack of APERF and MPERF in CPUID,
but turbostat didn't consult that before attempting to access them.
Since VMWARE allows access, but always returns 0, turbostat
got confusd into an infinite reset loop.
Head this off by listening to CPUID.6.APERF_MPERF
(and rename the existing variable to make this more clear)
Reported-by: David Arcari <darcari@redhat.com>
Tested-by: David Arcari <darcari@redhat.com>
Signed-off-by: Len Brown <len.brown@intel.com>
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check_perf_access() will now check both IPC and LLC perf counters
if they are enabled. If any fail, it now disables perf
and all perf counters.
Signed-off-by: Len Brown <len.brown@intel.com>
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Even though the platform->plat_rapl_msrs enumeration may be accurate,
a VM, such as AWS Nitro Hypervisor, may deny access to the underlying MSRs.
Probe if PKG_ENERGY is readable and non-zero.
If no, ignore all RAPL MSRs.
Reported-by: Emily Ehlert <ehemily@amazon.de>
Tested-by: Emily Ehlert <ehemily@amazon.de>
Signed-off-by: Len Brown <len.brown@intel.com>
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In err_on_hypervisor(), strstr() is called to search for "flags" in the
buffer, but the return value is not checked before being used in pointer
arithmetic (flags - buffer). If strstr() returns NULL because "flags" is
not found in /proc/cpuinfo, this will cause undefined behavior and likely
a crash.
Add a NULL check after the strstr() call and handle the error appropriately
by cleaning up resources and reporting a meaningful error message.
Signed-off-by: Malaya Kumar Rout <mrout@redhat.com>
Signed-off-by: Len Brown <len.brown@intel.com>
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The error message in validate_cpu_selected_set() uses an incomplete
format specifier "cpu%" instead of "cpu%d", resulting in the error
message printing "Requested cpu% is not present" rather than
showing the actual CPU number.
Fix the format string to properly display the CPU number.
Signed-off-by: Malaya Kumar Rout <mrout@redhat.com>
Signed-off-by: Len Brown <len.brown@intel.com>
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no functional change
Signed-off-by: Len Brown <len.brown@intel.com>
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Add support for Android MSR device paths which use /dev/msrN format
instead of the standard Linux /dev/cpu/N/msr format. The tool now
probes both path formats at startup and uses the appropriate one.
This enables x86_energy_perf_policy to work on Android systems where
MSR devices follow a different naming convention while maintaining
full compatibility with standard Linux systems.
Signed-off-by: Kaushlendra Kumar <kaushlendra.kumar@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
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Rather than starting down the conditional-compile road...
Probe the location of the MSR files at run-time.
Signed-off-by: Len Brown <len.brown@intel.com>
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Set per_cpu_msr_sum to NULL after freeing it in the error path
of msr_sum_record() to prevent potential use-after-free issues.
Signed-off-by: Emily Ehlert <ehemily@amazon.com>
Signed-off-by: Len Brown <len.brown@intel.com>
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LLCkRPS = Last Level Cache Thousands of References Per Second
LLC%hit = Last Level Cache Hit %
These columns are enabled by-default.
They can be controlled with the --show/--hide options
by individual column names above,
or together using the "llc" or "cache" groups.
Signed-off-by: Len Brown <len.brown@intel.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 cleanups from Borislav Petkov:
- The mandatory pile of cleanups the cat drags in every merge window
* tag 'x86_cleanups_for_v6.19_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/boot: Clean up whitespace in a20.c
x86/mm: Delete disabled debug code
x86/{boot,mtrr}: Remove unused function declarations
x86/percpu: Use BIT_WORD() and BIT_MASK() macros
x86/cpufeatures: Correct LKGS feature flag description
x86/idtentry: Add missing '*' to kernel-doc lines
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https://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD
- SCA rework
- VIRT_XFER_TO_GUEST_WORK support
- Operation exception forwarding support
- Cleanups
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer core updates from Thomas Gleixner:
- Prevent a thundering herd problem when the timekeeper CPU is delayed
and a large number of CPUs compete to acquire jiffies_lock to do the
update. Limit it to one CPU with a separate "uncontended" atomic
variable.
- A set of improvements for the timer migration mechanism:
- Support imbalanced NUMA trees correctly
- Support dynamic exclusion of CPUs from the migrator duty to allow
the cpuset/isolation mechanism to exclude them from handling
timers of remote idle CPUs
- The usual small updates, cleanups and enhancements
* tag 'timers-core-2025-11-30' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
timers/migration: Exclude isolated cpus from hierarchy
cpumask: Add initialiser to use cleanup helpers
sched/isolation: Force housekeeping if isolcpus and nohz_full don't leave any
cgroup/cpuset: Rename update_unbound_workqueue_cpumask() to update_isolation_cpumasks()
timers/migration: Use scoped_guard on available flag set/clear
timers/migration: Add mask for CPUs available in the hierarchy
timers/migration: Rename 'online' bit to 'available'
selftests/timers/nanosleep: Add tests for return of remaining time
selftests/timers: Clean up kernel version check in posix_timers
time: Fix a few typos in time[r] related code comments
time: tick-oneshot: Add missing Return and parameter descriptions to kernel-doc
hrtimer: Store time as ktime_t in restart block
timers/migration: Remove dead code handling idle CPU checking for remote timers
timers/migration: Remove unused "cpu" parameter from tmigr_get_group()
timers/migration: Assert that hotplug preparing CPU is part of stable active hierarchy
timers/migration: Fix imbalanced NUMA trees
timers/migration: Remove locking on group connection
timers/migration: Convert "while" loops to use "for"
tick/sched: Limit non-timekeeper CPUs calling jiffies update
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https://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD
KVM/arm64 updates for 6.19
- Support for userspace handling of synchronous external aborts (SEAs),
allowing the VMM to potentially handle the abort in a non-fatal
manner.
- Large rework of the VGIC's list register handling with the goal of
supporting more active/pending IRQs than available list registers in
hardware. In addition, the VGIC now supports EOImode==1 style
deactivations for IRQs which may occur on a separate vCPU than the
one that acked the IRQ.
- Support for FEAT_XNX (user / privileged execute permissions) and
FEAT_HAF (hardware update to the Access Flag) in the software page
table walkers and shadow MMU.
- Allow page table destruction to reschedule, fixing long need_resched
latencies observed when destroying a large VM.
- Minor fixes to KVM and selftests
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KVM/riscv changes for 6.19
- SBI MPXY support for KVM guest
- New KVM_EXIT_FAIL_ENTRY_NO_VSFILE for the case when in-kernel
AIA virtualization fails to allocate IMSIC VS-file
- Support enabling dirty log gradually in small chunks
- Fix guest page fault within HLV* instructions
- Flush VS-stage TLB after VCPU migration for Andes cores
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git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson into HEAD
LoongArch KVM changes for v6.19
1. Get VM PMU capability from HW GCFG register.
2. Add AVEC basic support.
3. Use 64-bit register definition for EIOINTC.
4. Add KVM timer test cases for tools/selftests.
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Add a CPUID testcase to verify that KVM allows KVM_SET_CPUID2 after (or in
conjunction with) runtime updates. This is a regression test for the bug
introduced by commit 93da6af3ae56 ("KVM: x86: Defer runtime updates of
dynamic CPUID bits until CPUID emulation"), where KVM would incorrectly
reject KVM_SET_CPUID due to a not handling a pending runtime update on the
current CPUID, resulting in a false mismatch between the "old" and "new"
CPUID entries.
Link: https://lore.kernel.org/all/20251128123202.68424a95@imammedo
Link: https://patch.msgid.link/20251202015049.1167490-3-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
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In commit 0297cdc12a87 ("KVM: selftests: Add option to rseq test to
override /dev/cpu_dma_latency"), a 'break' is missed before the option
'l' in the argument parsing loop, which leads to an unexpected core
dump in atoi_paranoid(). It tries to get the latency from non-existent
argument.
host$ ./rseq_test -u
Random seed: 0x6b8b4567
Segmentation fault (core dumped)
Add a 'break' before the option 'l' in the argument parsing loop to avoid
the unexpected core dump.
Fixes: 0297cdc12a87 ("KVM: selftests: Add option to rseq test to override /dev/cpu_dma_latency")
Cc: stable@vger.kernel.org # v6.15+
Signed-off-by: Gavin Shan <gshan@redhat.com>
Link: https://patch.msgid.link/20251124050427.1924591-1-gshan@redhat.com
[sean: describe code change in shortlog]
Signed-off-by: Sean Christopherson <seanjc@google.com>
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On an allmodconfig kernel compiled with Clang, objtool is segfaulting in
drivers/scsi/qla2xxx/qla2xxx.o due to a stack overflow in
validate_branch().
Due in part to KASAN being enabled, the qla2xxx code has a large number
of conditional jumps, causing objtool to go quite deep in its recursion.
By far the biggest offender of stack usage is the recently added
'prev_state' stack variable in validate_insn(), coming in at 328 bytes.
Move that variable (and its tracing usage) to handle_insn_ops() and make
handle_insn_ops() noinline to keep its stack frame outside the recursive
call chain.
Reported-by: Nathan Chancellor <nathan@kernel.org>
Fixes: fcb268b47a2f ("objtool: Trace instruction state changes during function validation")
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://patch.msgid.link/21bb161c23ca0d8c942a960505c0d327ca2dc7dc.1764691895.git.jpoimboe@kernel.org
Closes: https://lore.kernel.org/20251201202329.GA3225984@ax162
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Add tests that trigger packet drops in cake_enqueue(): "CAKE with QFQ
Parent - CAKE enqueue with packets dropping". It forces CAKE_enqueue to
return NET_XMIT_CN after dropping the packets when it has a QFQ parent.
Signed-off-by: Xiang Mei <xmei5@asu.edu>
Reviewed-by: Toke Høiland-Jørgensen <toke@toke.dk>
Link: https://patch.msgid.link/20251128001415.377823-3-xmei5@asu.edu
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus
ASoC: Updates for v6.19
This is a very large set of updates, as well as some more extensive
cleanup work from Morimto-san we've also added a generic SCDA class
driver for SoundWire devices enabling us to support many chips with
no custom code. There's also a batch of new drivers added for both
SoCs and CODECs.
- Added a SoundWire SCDA generic class driver, pulling in a little
regmap work to support it.
- A *lot* of cleaup and API improvement work from Morimoto-san.
- Lots of work on the existing Cirrus, Intel, Maxim and Qualcomm
drivers.
- Support for Allwinner A523, Mediatek MT8189, Qualcomm QCM2290,
QRB2210 and SM6115, SpacemiT K1, and TI TAS2568, TAS5802, TAS5806,
TAS5815, TAS5828 and TAS5830.
This also pulls in some gpiolib changes supporting shared GPIOs in the
core there so we can convert some of the ASoC drivers open coding
handling of that to the core functionality.
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull performance events updates from Ingo Molnar:
"Callchain support:
- Add support for deferred user-space stack unwinding for perf,
enabled on x86. (Peter Zijlstra, Steven Rostedt)
- unwind_user/x86: Enable frame pointer unwinding on x86 (Josh
Poimboeuf)
x86 PMU support and infrastructure:
- x86/insn: Simplify for_each_insn_prefix() (Peter Zijlstra)
- x86/insn,uprobes,alternative: Unify insn_is_nop() (Peter Zijlstra)
Intel PMU driver:
- Large series to prepare for and implement architectural PEBS
support for Intel platforms such as Clearwater Forest (CWF) and
Panther Lake (PTL). (Dapeng Mi, Kan Liang)
- Check dynamic constraints (Kan Liang)
- Optimize PEBS extended config (Peter Zijlstra)
- cstates:
- Remove PC3 support from LunarLake (Zhang Rui)
- Add Pantherlake support (Zhang Rui)
- Clearwater Forest support (Zide Chen)
AMD PMU driver:
- x86/amd: Check event before enable to avoid GPF (George Kennedy)
Fixes and cleanups:
- task_work: Fix NMI race condition (Peter Zijlstra)
- perf/x86: Fix NULL event access and potential PEBS record loss
(Dapeng Mi)
- Misc other fixes and cleanups (Dapeng Mi, Ingo Molnar, Peter
Zijlstra)"
* tag 'perf-core-2025-12-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (38 commits)
perf/x86/intel: Fix and clean up intel_pmu_drain_arch_pebs() type use
perf/x86/intel: Optimize PEBS extended config
perf/x86/intel: Check PEBS dyn_constraints
perf/x86/intel: Add a check for dynamic constraints
perf/x86/intel: Add counter group support for arch-PEBS
perf/x86/intel: Setup PEBS data configuration and enable legacy groups
perf/x86/intel: Update dyn_constraint base on PEBS event precise level
perf/x86/intel: Allocate arch-PEBS buffer and initialize PEBS_BASE MSR
perf/x86/intel: Process arch-PEBS records or record fragments
perf/x86/intel/ds: Factor out PEBS group processing code to functions
perf/x86/intel/ds: Factor out PEBS record processing code to functions
perf/x86/intel: Initialize architectural PEBS
perf/x86/intel: Correct large PEBS flag check
perf/x86/intel: Replace x86_pmu.drain_pebs calling with static call
perf/x86: Fix NULL event access and potential PEBS record loss
perf/x86: Remove redundant is_x86_event() prototype
entry,unwind/deferred: Fix unwind_reset_info() placement
unwind_user/x86: Fix arch=um build
perf: Support deferred user unwind
unwind_user/x86: Teach FP unwind about start of function
...
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull objtool updates from Ingo Molnar:
- klp-build livepatch module generation (Josh Poimboeuf)
Introduce new objtool features and a klp-build script to generate
livepatch modules using a source .patch as input.
This builds on concepts from the longstanding out-of-tree kpatch
project which began in 2012 and has been used for many years to
generate livepatch modules for production kernels. However, this is a
complete rewrite which incorporates hard-earned lessons from 12+
years of maintaining kpatch.
Key improvements compared to kpatch-build:
- Integrated with objtool: Leverages objtool's existing control-flow
graph analysis to help detect changed functions.
- Works on vmlinux.o: Supports late-linked objects, making it
compatible with LTO, IBT, and similar.
- Simplified code base: ~3k fewer lines of code.
- Upstream: No more out-of-tree #ifdef hacks, far less cruft.
- Cleaner internals: Vastly simplified logic for
symbol/section/reloc inclusion and special section extraction.
- Robust __LINE__ macro handling: Avoids false positive binary diffs
caused by the __LINE__ macro by introducing a fix-patch-lines
script which injects #line directives into the source .patch to
preserve the original line numbers at compile time.
- Disassemble code with libopcodes instead of running objdump
(Alexandre Chartre)
- Disassemble support (-d option to objtool) by Alexandre Chartre,
which supports the decoding of various Linux kernel code generation
specials such as alternatives:
17ef: sched_balance_find_dst_group+0x62f mov 0x34(%r9),%edx
17f3: sched_balance_find_dst_group+0x633 | <alternative.17f3> | X86_FEATURE_POPCNT
17f3: sched_balance_find_dst_group+0x633 | call 0x17f8 <__sw_hweight64> | popcnt %rdi,%rax
17f8: sched_balance_find_dst_group+0x638 cmp %eax,%edx
... jump table alternatives:
1895: sched_use_asym_prio+0x5 test $0x8,%ch
1898: sched_use_asym_prio+0x8 je 0x18a9 <sched_use_asym_prio+0x19>
189a: sched_use_asym_prio+0xa | <jump_table.189a> | JUMP
189a: sched_use_asym_prio+0xa | jmp 0x18ae <sched_use_asym_prio+0x1e> | nop2
189c: sched_use_asym_prio+0xc mov $0x1,%eax
18a1: sched_use_asym_prio+0x11 and $0x80,%ecx
... exception table alternatives:
native_read_msr:
5b80: native_read_msr+0x0 mov %edi,%ecx
5b82: native_read_msr+0x2 | <ex_table.5b82> | EXCEPTION
5b82: native_read_msr+0x2 | rdmsr | resume at 0x5b84 <native_read_msr+0x4>
5b84: native_read_msr+0x4 shl $0x20,%rdx
.... x86 feature flag decoding (also see the X86_FEATURE_POPCNT
example in sched_balance_find_dst_group() above):
2faaf: start_thread_common.constprop.0+0x1f jne 0x2fba4 <start_thread_common.constprop.0+0x114>
2fab5: start_thread_common.constprop.0+0x25 | <alternative.2fab5> | X86_FEATURE_ALWAYS | X86_BUG_NULL_SEG
2fab5: start_thread_common.constprop.0+0x25 | jmp 0x2faba <.altinstr_aux+0x2f4> | jmp 0x4b0 <start_thread_common.constprop.0+0x3f> | nop5
2faba: start_thread_common.constprop.0+0x2a mov $0x2b,%eax
... NOP sequence shortening:
1048e2: snapshot_write_finalize+0xc2 je 0x104917 <snapshot_write_finalize+0xf7>
1048e4: snapshot_write_finalize+0xc4 nop6
1048ea: snapshot_write_finalize+0xca nop11
1048f5: snapshot_write_finalize+0xd5 nop11
104900: snapshot_write_finalize+0xe0 mov %rax,%rcx
104903: snapshot_write_finalize+0xe3 mov 0x10(%rdx),%rax
... and much more.
- Function validation tracing support (Alexandre Chartre)
- Various -ffunction-sections fixes (Josh Poimboeuf)
- Clang AutoFDO (Automated Feedback-Directed Optimizations) support
(Josh Poimboeuf)
- Misc fixes and cleanups (Borislav Petkov, Chen Ni, Dylan Hatch, Ingo
Molnar, John Wang, Josh Poimboeuf, Pankaj Raghav, Peter Zijlstra,
Thorsten Blum)
* tag 'objtool-core-2025-12-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (129 commits)
objtool: Fix segfault on unknown alternatives
objtool: Build with disassembly can fail when including bdf.h
objtool: Trim trailing NOPs in alternative
objtool: Add wide output for disassembly
objtool: Compact output for alternatives with one instruction
objtool: Improve naming of group alternatives
objtool: Add Function to get the name of a CPU feature
objtool: Provide access to feature and flags of group alternatives
objtool: Fix address references in alternatives
objtool: Disassemble jump table alternatives
objtool: Disassemble exception table alternatives
objtool: Print addresses with alternative instructions
objtool: Disassemble group alternatives
objtool: Print headers for alternatives
objtool: Preserve alternatives order
objtool: Add the --disas=<function-pattern> action
objtool: Do not validate IBT for .return_sites and .call_sites
objtool: Improve tracing of alternative instructions
objtool: Add functions to better name alternatives
objtool: Identify the different types of alternatives
...
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Currently, tolerance is computed against the TC’s expected percentage,
making TC3 (20%) validation overly strict and TC4 (80%) overly loose.
Update BandwidthValidator to take a dict of shares and compute bounds
relative to the overall total, so that all shares are validated
consistently.
Signed-off-by: Carolina Jubran <cjubran@nvidia.com>
Reviewed-by: Cosmin Ratiu <cratiu@nvidia.com>
Reviewed-by: Nimrod Oren <noren@nvidia.com>
Link: https://patch.msgid.link/20251130091938.4109055-7-cjubran@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Correct the documented bandwidth distribution between TC3 and TC4
from 80/20 to 20/80. Update test descriptions and printed messages
to consistently reflect the intended split.
Signed-off-by: Carolina Jubran <cjubran@nvidia.com>
Reviewed-by: Cosmin Ratiu <cratiu@nvidia.com>
Reviewed-by: Nimrod Oren <noren@nvidia.com>
Link: https://patch.msgid.link/20251130091938.4109055-6-cjubran@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Commit 7c32f7a2d3db ("selftests: net: py: don't default to shell=True")
changed the cmd() helper to avoid spawning a shell unless explicitly
requested.
The devlink_rate_tc_bw test enables SR-IOV by writing to the
sriov_numvfs sysfs attribute using redirection. Without shell=True the
redirection is not interpreted and the VF device never appears,
causing the test to fail.
Fix by explicitly passing shell=True in the two places that update
sriov_numvfs.
Signed-off-by: Carolina Jubran <cjubran@nvidia.com>
Reviewed-by: Cosmin Ratiu <cratiu@nvidia.com>
Reviewed-by: Nimrod Oren <noren@nvidia.com>
Link: https://patch.msgid.link/20251130091938.4109055-5-cjubran@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Replace the inline iperf3 subprocess and JSON parsing with
Iperf3Runner.
Signed-off-by: Carolina Jubran <cjubran@nvidia.com>
Reviewed-by: Cosmin Ratiu <cratiu@nvidia.com>
Reviewed-by: Nimrod Oren <noren@nvidia.com>
Link: https://patch.msgid.link/20251130091938.4109055-4-cjubran@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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GenerateTraffic was added to spin up long-running iperf3 load, mainly
to drive high PPS background traffic. It was never meant to provide
stable throughput numbers, and trying to repurpose it for measurement
does not make sense.
Introduce Iperf3Runner to allow tests to split out server/client
configuration, control start/stop, and collect JSON output for
analysis. This makes it possible to measure bandwidth directly when
validating egress shaping.
GenerateTraffic stays as the background load generator, reusing the
common iperf3 helpers under the hood.
Signed-off-by: Carolina Jubran <cjubran@nvidia.com>
Reviewed-by: Cosmin Ratiu <cratiu@nvidia.com>
Reviewed-by: Nimrod Oren <noren@nvidia.com>
Link: https://patch.msgid.link/20251130091938.4109055-3-cjubran@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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This makes devlink_rate_tc_bw.py present in the Makefile under the same
directory.
Signed-off-by: Carolina Jubran <cjubran@nvidia.com>
Reviewed-by: Cosmin Ratiu <cratiu@nvidia.com>
Reviewed-by: Nimrod Oren <noren@nvidia.com>
Link: https://patch.msgid.link/20251130091938.4109055-2-cjubran@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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This removes some noise that can be distracting while looking at
selftests by redirecting socat stderr to /dev/null.
Before this commit, netcons_basic would output:
Running with target mode: basic (ipv6)
2025/11/29 12:08:03 socat[259] W exiting on signal 15
2025/11/29 12:08:03 socat[271] W exiting on signal 15
basic : ipv6 : Test passed
Running with target mode: basic (ipv4)
2025/11/29 12:08:05 socat[329] W exiting on signal 15
2025/11/29 12:08:05 socat[322] W exiting on signal 15
basic : ipv4 : Test passed
Running with target mode: extended (ipv6)
2025/11/29 12:08:08 socat[386] W exiting on signal 15
2025/11/29 12:08:08 socat[386] W exiting on signal 15
2025/11/29 12:08:08 socat[380] W exiting on signal 15
extended : ipv6 : Test passed
Running with target mode: extended (ipv4)
2025/11/29 12:08:10 socat[440] W exiting on signal 15
2025/11/29 12:08:10 socat[435] W exiting on signal 15
2025/11/29 12:08:10 socat[435] W exiting on signal 15
extended : ipv4 : Test passed
After these changes, output looks like:
Running with target mode: basic (ipv6)
basic : ipv6 : Test passed
Running with target mode: basic (ipv4)
basic : ipv4 : Test passed
Running with target mode: extended (ipv6)
extended : ipv6 : Test passed
Running with target mode: extended (ipv4)
extended : ipv4 : Test passed
Signed-off-by: Andre Carvalho <asantostc@gmail.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20251129-netcons-socat-noise-v1-1-605a0cea8fca@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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New NIPA installation had been reporting a few flaky tests.
arp_ndisc_evict_nocarrier is most flaky of them all.
I suspect that the flakiness is due to udev swapping the MAC
addresses on the interfaces. Extend the message in
arp_ndisc_evict_nocarrier to hint at this potential issue.
Having the neigh get fail right after ping is rather unusual,
unless udev changes the MAC addr causing a flush in the meantime.
Link: https://patch.msgid.link/20251127194556.2409574-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Following up on the old discussion [1]. Let the BaseExceptions out of
defer()'ed cleanup. And handle it in the main loop. This allows us to
exit the tests if user hit Ctrl-C during defer().
Link: https://lore.kernel.org/20251119063228.3adfd743@kernel.org # [1]
Reviewed-by: Simon Horman <horms@kernel.org>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Link: https://patch.msgid.link/20251128004846.2602687-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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There is a spelling mistake in an error message. Fix it.
Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Link: https://patch.msgid.link/20251128173802.318520-1-colin.i.king@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
Pull pidfd and coredump updates from Christian Brauner:
"Features:
- Expose coredump signal via pidfd
Expose the signal that caused the coredump through the pidfd
interface. The recent changes to rework coredump handling to rely
on unix sockets are in the process of being used in systemd. The
previous systemd coredump container interface requires the coredump
file descriptor and basic information including the signal number
to be sent to the container. This means the signal number needs to
be available before sending the coredump to the container.
- Add supported_mask field to pidfd
Add a new supported_mask field to struct pidfd_info that indicates
which information fields are supported by the running kernel. This
allows userspace to detect feature availability without relying on
error codes or kernel version checks.
Cleanups:
- Drop struct pidfs_exit_info and prepare to drop exit_info pointer,
simplifying the internal publication mechanism for exit and
coredump information retrievable via the pidfd ioctl
- Use guard() for task_lock in pidfs
- Reduce wait_pidfd lock scope
- Add missing PIDFD_INFO_SIZE_VER1 constant
- Add missing BUILD_BUG_ON() assert on struct pidfd_info
Fixes:
- Fix PIDFD_INFO_COREDUMP handling
Selftests:
- Split out coredump socket tests and common helpers into separate
files for better organization
- Fix userspace coredump client detection issues
- Handle edge-triggered epoll correctly
- Ignore ENOSPC errors in tests
- Add debug logging to coredump socket tests, socket protocol tests,
and test helpers
- Add tests for PIDFD_INFO_COREDUMP_SIGNAL
- Add tests for supported_mask field
- Update pidfd header for selftests"
* tag 'vfs-6.19-rc1.coredump' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs: (23 commits)
pidfs: reduce wait_pidfd lock scope
selftests/coredump: add second PIDFD_INFO_COREDUMP_SIGNAL test
selftests/coredump: add first PIDFD_INFO_COREDUMP_SIGNAL test
selftests/coredump: ignore ENOSPC errors
selftests/coredump: add debug logging to coredump socket protocol tests
selftests/coredump: add debug logging to coredump socket tests
selftests/coredump: add debug logging to test helpers
selftests/coredump: handle edge-triggered epoll correctly
selftests/coredump: fix userspace coredump client detection
selftests/coredump: fix userspace client detection
selftests/coredump: split out coredump socket tests
selftests/coredump: split out common helpers
selftests/pidfd: add second supported_mask test
selftests/pidfd: add first supported_mask test
selftests/pidfd: update pidfd header
pidfs: expose coredump signal
pidfs: drop struct pidfs_exit_info
pidfs: prepare to drop exit_info pointer
pidfd: add a new supported_mask field
pidfs: add missing BUILD_BUG_ON() assert on struct pidfd_info
...
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git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
Pull namespace updates from Christian Brauner:
"This contains substantial namespace infrastructure changes including a new
system call, active reference counting, and extensive header cleanups.
The branch depends on the shared kbuild branch for -fms-extensions support.
Features:
- listns() system call
Add a new listns() system call that allows userspace to iterate
through namespaces in the system. This provides a programmatic
interface to discover and inspect namespaces, addressing
longstanding limitations:
Currently, there is no direct way for userspace to enumerate
namespaces. Applications must resort to scanning /proc/*/ns/ across
all processes, which is:
- Inefficient - requires iterating over all processes
- Incomplete - misses namespaces not attached to any running
process but kept alive by file descriptors, bind mounts, or
parent references
- Permission-heavy - requires access to /proc for many processes
- No ordering or ownership information
- No filtering per namespace type
The listns() system call solves these problems:
ssize_t listns(const struct ns_id_req *req, u64 *ns_ids,
size_t nr_ns_ids, unsigned int flags);
struct ns_id_req {
__u32 size;
__u32 spare;
__u64 ns_id;
struct /* listns */ {
__u32 ns_type;
__u32 spare2;
__u64 user_ns_id;
};
};
Features include:
- Pagination support for large namespace sets
- Filtering by namespace type (MNT_NS, NET_NS, USER_NS, etc.)
- Filtering by owning user namespace
- Permission checks respecting namespace isolation
- Active Reference Counting
Introduce an active reference count that tracks namespace
visibility to userspace. A namespace is visible in the following
cases:
- The namespace is in use by a task
- The namespace is persisted through a VFS object (namespace file
descriptor or bind-mount)
- The namespace is a hierarchical type and is the parent of child
namespaces
The active reference count does not regulate lifetime (that's still
done by the normal reference count) - it only regulates visibility
to namespace file handles and listns().
This prevents resurrection of namespaces that are pinned only for
internal kernel reasons (e.g., user namespaces held by
file->f_cred, lazy TLB references on idle CPUs, etc.) which should
not be accessible via (1)-(3).
- Unified Namespace Tree
Introduce a unified tree structure for all namespaces with:
- Fixed IDs assigned to initial namespaces
- Lookup based solely on inode number
- Maintained list of owned namespaces per user namespace
- Simplified rbtree comparison helpers
Cleanups
- Header Reorganization:
- Move namespace types into separate header (ns_common_types.h)
- Decouple nstree from ns_common header
- Move nstree types into separate header
- Switch to new ns_tree_{node,root} structures with helper functions
- Use guards for ns_tree_lock
- Initial Namespace Reference Count Optimization
- Make all reference counts on initial namespaces a nop to avoid
pointless cacheline ping-pong for namespaces that can never go
away
- Drop custom reference count initialization for initial namespaces
- Add NS_COMMON_INIT() macro and use it for all namespaces
- pid: rely on common reference count behavior
- Miscellaneous Cleanups
- Rename exit_task_namespaces() to exit_nsproxy_namespaces()
- Rename is_initial_namespace() and make argument const
- Use boolean to indicate anonymous mount namespace
- Simplify owner list iteration in nstree
- nsfs: raise SB_I_NODEV, SB_I_NOEXEC, and DCACHE_DONTCACHE explicitly
- nsfs: use inode_just_drop()
- pidfs: raise DCACHE_DONTCACHE explicitly
- pidfs: simplify PIDFD_GET__NAMESPACE ioctls
- libfs: allow to specify s_d_flags
- cgroup: add cgroup namespace to tree after owner is set
- nsproxy: fix free_nsproxy() and simplify create_new_namespaces()
Fixes:
- setns(pidfd, ...) race condition
Fix a subtle race when using pidfds with setns(). When the target
task exits after prepare_nsset() but before commit_nsset(), the
namespace's active reference count might have been dropped. If
setns() then installs the namespaces, it would bump the active
reference count from zero without taking the required reference on
the owner namespace, leading to underflow when later decremented.
The fix resurrects the ownership chain if necessary - if the caller
succeeded in grabbing passive references, the setns() should
succeed even if the target task exits or gets reaped.
- Return EFAULT on put_user() error instead of success
- Make sure references are dropped outside of RCU lock (some
namespaces like mount namespace sleep when putting the last
reference)
- Don't skip active reference count initialization for network
namespace
- Add asserts for active refcount underflow
- Add asserts for initial namespace reference counts (both passive
and active)
- ipc: enable is_ns_init_id() assertions
- Fix kernel-doc comments for internal nstree functions
- Selftests
- 15 active reference count tests
- 9 listns() functionality tests
- 7 listns() permission tests
- 12 inactive namespace resurrection tests
- 3 threaded active reference count tests
- commit_creds() active reference tests
- Pagination and stress tests
- EFAULT handling test
- nsid tests fixes"
* tag 'namespace-6.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs: (103 commits)
pidfs: simplify PIDFD_GET_<type>_NAMESPACE ioctls
nstree: fix kernel-doc comments for internal functions
nsproxy: fix free_nsproxy() and simplify create_new_namespaces()
selftests/namespaces: fix nsid tests
ns: drop custom reference count initialization for initial namespaces
pid: rely on common reference count behavior
ns: add asserts for initial namespace active reference counts
ns: add asserts for initial namespace reference counts
ns: make all reference counts on initial namespace a nop
ipc: enable is_ns_init_id() assertions
fs: use boolean to indicate anonymous mount namespace
ns: rename is_initial_namespace()
ns: make is_initial_namespace() argument const
nstree: use guards for ns_tree_lock
nstree: simplify owner list iteration
nstree: switch to new structures
nstree: add helper to operate on struct ns_tree_{node,root}
nstree: move nstree types into separate header
nstree: decouple from ns_common header
ns: move namespace types into separate header
...
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Pull remaining 6.18-devel changes.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
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So 'objtool --link -d vmlinux.o' gets surprised by this endbr64+endbr64 pattern
in ___bpf_prog_run():
___bpf_prog_run:
1e7680: ___bpf_prog_run+0x0 push %r12
1e7682: ___bpf_prog_run+0x2 mov %rdi,%r12
1e7685: ___bpf_prog_run+0x5 push %rbp
1e7686: ___bpf_prog_run+0x6 xor %ebp,%ebp
1e7688: ___bpf_prog_run+0x8 push %rbx
1e7689: ___bpf_prog_run+0x9 mov %rsi,%rbx
1e768c: ___bpf_prog_run+0xc movzbl (%rbx),%esi
1e768f: ___bpf_prog_run+0xf movzbl %sil,%edx
1e7693: ___bpf_prog_run+0x13 mov %esi,%eax
1e7695: ___bpf_prog_run+0x15 mov 0x0(,%rdx,8),%rdx
1e769d: ___bpf_prog_run+0x1d jmp 0x1e76a2 <__x86_indirect_thunk_rdx>
1e76a2: ___bpf_prog_run+0x22 endbr64
1e76a6: ___bpf_prog_run+0x26 endbr64
1e76aa: ___bpf_prog_run+0x2a mov 0x4(%rbx),%edx
And crashes due to blindly dereferencing alt->insn->alt_group.
Bail out on NULL ->alt_group, which produces this warning and continues
with the disassembly, instead of a segfault:
.git/O/vmlinux.o: warning: objtool: <alternative.1e769d>: failed to disassemble alternative
Cc: Alexandre Chartre <alexandre.chartre@oracle.com>
Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Josh Poimboeuf <jpoimboe@kernel.org>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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* kvm-arm64/nv-xnx-haf: (22 commits)
: Support for FEAT_XNX and FEAT_HAF in nested
:
: Add support for a couple of MMU-related features that weren't
: implemented by KVM's software page table walk:
:
: - FEAT_XNX: Allows the hypervisor to describe execute permissions
: separately for EL0 and EL1
:
: - FEAT_HAF: Hardware update of the Access Flag, which in the context of
: nested means software walkers must also set the Access Flag.
:
: The series also adds some basic support for testing KVM's emulation of
: the AT instruction, including the implementation detail that AT sets the
: Access Flag in KVM.
KVM: arm64: at: Update AF on software walk only if VM has FEAT_HAFDBS
KVM: arm64: at: Use correct HA bit in TCR_EL2 when regime is EL2
KVM: arm64: Document KVM_PGTABLE_PROT_{UX,PX}
KVM: arm64: Fix spelling mistake "Unexpeced" -> "Unexpected"
KVM: arm64: Add break to default case in kvm_pgtable_stage2_pte_prot()
KVM: arm64: Add endian casting to kvm_swap_s[12]_desc()
KVM: arm64: Fix compilation when CONFIG_ARM64_USE_LSE_ATOMICS=n
KVM: arm64: selftests: Add test for AT emulation
KVM: arm64: nv: Expose hardware access flag management to NV guests
KVM: arm64: nv: Implement HW access flag management in stage-2 SW PTW
KVM: arm64: Implement HW access flag management in stage-1 SW PTW
KVM: arm64: Propagate PTW errors up to AT emulation
KVM: arm64: Add helper for swapping guest descriptor
KVM: arm64: nv: Use pgtable definitions in stage-2 walk
KVM: arm64: Handle endianness in read helper for emulated PTW
KVM: arm64: nv: Stop passing vCPU through void ptr in S2 PTW
KVM: arm64: Call helper for reading descriptors directly
KVM: arm64: nv: Advertise support for FEAT_XNX
KVM: arm64: Teach ptdump about FEAT_XNX permissions
KVM: arm64: nv: Forward FEAT_XNX permissions to the shadow stage-2
...
Signed-off-by: Oliver Upton <oupton@kernel.org>
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* kvm-arm64/vgic-lr-overflow: (50 commits)
: Support for VGIC LR overflows, courtesy of Marc Zyngier
:
: Address deficiencies in KVM's GIC emulation when a vCPU has more active
: IRQs than can be represented in the VGIC list registers. Sort the AP
: list to prioritize inactive and pending IRQs, potentially spilling
: active IRQs outside of the LRs.
:
: Handle deactivation of IRQs outside of the LRs for both EOImode=0/1,
: which involves special consideration for SPIs being deactivated from a
: different vCPU than the one that acked it.
KVM: arm64: Convert ICH_HCR_EL2_TDIR cap to EARLY_LOCAL_CPU_FEATURE
KVM: arm64: selftests: vgic_irq: Add timer deactivation test
KVM: arm64: selftests: vgic_irq: Add Group-0 enable test
KVM: arm64: selftests: vgic_irq: Add asymmetric SPI deaectivation test
KVM: arm64: selftests: vgic_irq: Perform EOImode==1 deactivation in ack order
KVM: arm64: selftests: vgic_irq: Remove LR-bound limitation
KVM: arm64: selftests: vgic_irq: Exclude timer-controlled interrupts
KVM: arm64: selftests: vgic_irq: Change configuration before enabling interrupt
KVM: arm64: selftests: vgic_irq: Fix GUEST_ASSERT_IAR_EMPTY() helper
KVM: arm64: selftests: gic_v3: Disable Group-0 interrupts by default
KVM: arm64: selftests: gic_v3: Add irq group setting helper
KVM: arm64: GICv2: Always trap GICV_DIR register
KVM: arm64: GICv2: Handle deactivation via GICV_DIR traps
KVM: arm64: GICv2: Handle LR overflow when EOImode==0
KVM: arm64: GICv3: Force exit to sync ICH_HCR_EL2.En
KVM: arm64: GICv3: nv: Plug L1 LR sync into deactivation primitive
KVM: arm64: GICv3: nv: Resync LRs/VMCR/HCR early for better MI emulation
KVM: arm64: GICv3: Avoid broadcast kick on CPUs lacking TDIR
KVM: arm64: GICv3: Handle in-LR deactivation when possible
KVM: arm64: GICv3: Add SPI tracking to handle asymmetric deactivation
...
Signed-off-by: Oliver Upton <oupton@kernel.org>
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* kvm-arm64/sea-user:
: Userspace handling of SEAs, courtesy of Jiaqi Yan
:
: Add support for processing external aborts in userspace in situations
: where the host has failed to do so, allowing the VMM to potentially
: reinject an external abort into the VM.
Documentation: kvm: new UAPI for handling SEA
KVM: selftests: Test for KVM_EXIT_ARM_SEA
KVM: arm |
