selftest/x86/bugs: Add selftests for ITS

Below are the tests added for Indirect Target Selection (ITS):

- its_sysfs.py - Check if sysfs reflects the correct mitigation status for
the mitigation s

selftest/x86/bugs: Add selftests for ITS

Below are the tests added for Indirect Target Selection (ITS):

- its_sysfs.py - Check if sysfs reflects the correct mitigation status for
the mitigation selected via the kernel cmdline.

- its_permutations.py - tests mitigation selection with cmdline
permutations with other bugs like spectre_v2 and retbleed.

- its_indirect_alignment.py - verifies that for addresses in
.retpoline_sites section that belong to lower half of cacheline are
patched to ITS-safe thunk. Typical output looks like below:

Site 49: function symbol: __x64_sys_restart_syscall+0x1f <0xffffffffbb1509af>
# vmlinux: 0xffffffff813509af: jmp 0xffffffff81f5a8e0
# kcore: 0xffffffffbb1509af: jmpq *%rax
# ITS thunk NOT expected for site 49
# PASSED: Found *%rax
#
Site 50: function symbol: __resched_curr+0xb0 <0xffffffffbb181910>
# vmlinux: 0xffffffff81381910: jmp 0xffffffff81f5a8e0
# kcore: 0xffffffffbb181910: jmp 0xffffffffc02000fc
# ITS thunk expected for site 50
# PASSED: Found 0xffffffffc02000fc -> jmpq *%rax <scattered-thunk?>

- its_ret_alignment.py - verifies that for addresses in .return_sites
section that belong to lower half of cacheline are patched to
its_return_thunk. Typical output looks like below:

Site 97: function symbol: collect_event+0x48 <0xffffffffbb007f18>
# vmlinux: 0xffffffff81207f18: jmp 0xffffffff81f5b500
# kcore: 0xffffffffbb007f18: jmp 0xffffffffbbd5b560
# PASSED: Found jmp 0xffffffffbbd5b560 <its_return_thunk>
#
Site 98: function symbol: collect_event+0xa4 <0xffffffffbb007f74>
# vmlinux: 0xffffffff81207f74: jmp 0xffffffff81f5b500
# kcore: 0xffffffffbb007f74: retq
# PASSED: Found retq

Some of these tests have dependency on tools like virtme-ng[1] and drgn[2].
When the dependencies are not met, the test will be skipped.

[1] https://github.com/arighi/virtme-ng
[2] https://github.com/osandov/drgn

Co-developed-by: Tao Zhang <[email protected]>
Signed-off-by: Tao Zhang <[email protected]>
Signed-off-by: Pawan Gupta <[email protected]>
Signed-off-by: Dave Hansen <[email protected]>

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selftest: test system mappings are sealed

Add sysmap_is_sealed.c to test system mappings are sealed.

Note: CONFIG_MSEAL_SYSTEM_MAPPINGS must be set, as indicated in
config file.

Link: https://lkml

selftest: test system mappings are sealed

Add sysmap_is_sealed.c to test system mappings are sealed.

Note: CONFIG_MSEAL_SYSTEM_MAPPINGS must be set, as indicated in
config file.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Jeff Xu <[email protected]>
Reviewed-by: Lorenzo Stoakes <[email protected]>
Reviewed-by: Kees Cook <[email protected]>
Cc: Adhemerval Zanella <[email protected]>
Cc: Alexander Mikhalitsyn <[email protected]>
Cc: Alexey Dobriyan <[email protected]>
Cc: Andrei Vagin <[email protected]>
Cc: Anna-Maria Behnsen <[email protected]>
Cc: Ard Biesheuvel <[email protected]>
Cc: Benjamin Berg <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: David Rientjes <[email protected]>
Cc: David S. Miller <[email protected]>
Cc: Elliot Hughes <[email protected]>
Cc: Florian Faineli <[email protected]>
Cc: Greg Ungerer <[email protected]>
Cc: Guenter Roeck <[email protected]>
Cc: Heiko Carstens <[email protected]>
Cc: Helge Deller <[email protected]>
Cc: Hyeonggon Yoo <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Jann Horn <[email protected]>
Cc: Jason A. Donenfeld <[email protected]>
Cc: Johannes Berg <[email protected]>
Cc: Jorge Lucangeli Obes <[email protected]>
Cc: Liam R. Howlett <[email protected]>
Cc: Linus Waleij <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Matthew Wilcow (Oracle) <[email protected]>
Cc: Michael Ellerman <[email protected]>
Cc: Michal Hocko <[email protected]>
Cc: Miguel Ojeda <[email protected]>
Cc: Mike Rapoport <[email protected]>
Cc: Oleg Nesterov <[email protected]>
Cc: Pedro Falcato <[email protected]>
Cc: Peter Xu <[email protected]>
Cc: Randy Dunlap <[email protected]>
Cc: Stephen Röttger <[email protected]>
Cc: Thomas Weißschuh <[email protected]>
Cc: Vlastimil Babka <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

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selftests: add tests for mount notification

Provide coverage for all mnt_notify_add() instances.

Signed-off-by: Miklos Szeredi <[email protected]>
Link: https://lore.kernel.org/r/20250307204046.3

selftests: add tests for mount notification

Provide coverage for all mnt_notify_add() instances.

Signed-off-by: Miklos Szeredi <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Christian Brauner <[email protected]>

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selftests: ublk: add kernel selftests for ublk

Both ublk driver and userspace heavily depends on io_uring subsystem,
and tools/testing/selftests/ should be the best place for holding this
cross-subs

selftests: ublk: add kernel selftests for ublk

Both ublk driver and userspace heavily depends on io_uring subsystem,
and tools/testing/selftests/ should be the best place for holding this
cross-subsystem tests.

Add basic read/write IO test over this ublk null disk, and make sure ublk
working.

More tests will be added.

Signed-off-by: Ming Lei <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jens Axboe <[email protected]>

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selftests: pci_endpoint: Migrate to Kselftest framework

Migrate the PCI endpoint test to Kselftest framework. All the tests that
were part of the previous pcitest.sh file were migrated.

Below is th

selftests: pci_endpoint: Migrate to Kselftest framework

Migrate the PCI endpoint test to Kselftest framework. All the tests that
were part of the previous pcitest.sh file were migrated.

Below is the list of tests converted:

1. BAR0 Test
2. BAR1 Test
3. BAR2 Test
4. BAR3 Test
5. BAR4 Test
6. BAR5 Test
7. Consecutive BAR Tests
8. Legacy IRQ Tests
9. MSI Interrupt Tests (MSI1 to MSI32)
10. MSI-X Interrupt Tests (MSI-X1 to MSI-X2048)
11. Read Tests - MEMCPY (For 1, 1024, 1025, 1024000, 1024001 Bytes)
12. Write Tests - MEMCPY (For 1, 1024, 1025, 1024000, 1024001 Bytes)
13. Copy Tests - MEMCPY (For 1, 1024, 1025, 1024000, 1024001 Bytes)
14. Read Tests - DMA (For 1, 1024, 1025, 1024000, 1024001 Bytes)
15. Write Tests - DMA (For 1, 1024, 1025, 1024000, 1024001 Bytes)
16. Copy Tests - DMA (For 1, 1024, 1025, 1024000, 1024001 Bytes)

BAR, DMA and MEMCPY tests are added as fixture variants and can be executed
separately as below:

$ pci_endpoint_test -v BAR0
$ pci_endpoint_test -v dma
$ pci_endpoint_test -v memcpy

Link: https://lore.kernel.org/r/[email protected]
Co-developed-by: Aman Gupta <[email protected]>
Co-developed-by: Padmanabhan Rajanbabu <[email protected]>
[mani: reworked based on the IOCTL fix, cleanups, documentation, commit message]
Signed-off-by: Aman Gupta <[email protected]>
Signed-off-by: Padmanabhan Rajanbabu <[email protected]>
Signed-off-by: Manivannan Sadhasivam <[email protected]>
Signed-off-by: Bjorn Helgaas <[email protected]>
Tested-by: Niklas Cassel <[email protected]>
Reviewed-by: Niklas Cassel <[email protected]>

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selftests: ntsync: Add some tests for semaphore state.

Wine has tests for its synchronization primitives, but these are more accessible
to kernel developers, and also allow us to test some edge case

selftests: ntsync: Add some tests for semaphore state.

Wine has tests for its synchronization primitives, but these are more accessible
to kernel developers, and also allow us to test some edge cases that Wine does
not care about.

This patch adds tests for semaphore-specific ioctls NTSYNC_IOC_SEM_POST and
NTSYNC_IOC_SEM_READ, and waiting on semaphores.

Signed-off-by: Elizabeth Figura <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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selftests/pcie_bwctrl: Create selftests

Create selftests for PCIe BW control through the PCIe cooling device sysfs
interface.

First, the BW control selftest finds the PCIe Port to test with. By
def

selftests/pcie_bwctrl: Create selftests

Create selftests for PCIe BW control through the PCIe cooling device sysfs
interface.

First, the BW control selftest finds the PCIe Port to test with. By
default, the PCIe Port with the highest Link Speed is selected but
another PCIe Port can be provided with -d parameter.

The actual test steps the cur_state of the cooling device one-by-one
from max_state to what the cur_state was initially. The speed change
is confirmed by observing the current_link_speed for the corresponding
PCIe Port.

Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Ilpo Järvinen <[email protected]>
Signed-off-by: Bjorn Helgaas <[email protected]>
Reviewed-by: Jonathan Cameron <[email protected]>

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selftests: Rename sigaltstack to generic signal

Rename sigaltstack to generic signal directory, to allow adding more
signal tests in the future.

Signed-off-by: Dev Jain <[email protected]>
Reviewed-

selftests: Rename sigaltstack to generic signal

Rename sigaltstack to generic signal directory, to allow adding more
signal tests in the future.

Signed-off-by: Dev Jain <[email protected]>
Reviewed-by: Mark Brown <[email protected]>
Acked-by: Shuah Khan <[email protected]>
Signed-off-by: Shuah Khan <[email protected]>

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selftests: sched_ext: Add sched_ext as proper selftest target

The sched_ext selftests is missing proper cross-compilation support, a
proper target entry, and out-of-tree build support.

When buildin

selftests: sched_ext: Add sched_ext as proper selftest target

The sched_ext selftests is missing proper cross-compilation support, a
proper target entry, and out-of-tree build support.

When building the kselftest suite, e.g.:

make ARCH=riscv CROSS_COMPILE=riscv64-linux-gnu- \
TARGETS=sched_ext SKIP_TARGETS="" O=/output/foo \
-C tools/testing/selftests install

or:

make ARCH=arm64 LLVM=1 TARGETS=sched_ext SKIP_TARGETS="" \
O=/output/foo -C tools/testing/selftests install

The expectation is that the sched_ext is included, cross-built, the
correct toolchain is picked up, and placed into /output/foo.

In contrast to the BPF selftests, the sched_ext suite does not use
bpftool at test run-time, so it is sufficient to build bpftool for the
build host only.

Add ARCH, CROSS_COMPILE, OUTPUT, and TARGETS support to the sched_ext
selftest. Also, remove some variables that were unused by the
Makefile.

Signed-off-by: Björn Töpel <[email protected]>
Reviewed-by: Shuah Khan <[email protected]>
Acked-by: David Vernet <[email protected]>
Tested-by: Mark Brown <[email protected]>
Reviewed-by: Mark Brown <[email protected]>
Signed-off-by: Tejun Heo <[email protected]>

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selftests/net: integrate packetdrill with ksft

Lay the groundwork to import into kselftests the over 150 packetdrill
TCP/IP conformance tests on github.com/google/packetdrill.

Florian recently adde

selftests/net: integrate packetdrill with ksft

Lay the groundwork to import into kselftests the over 150 packetdrill
TCP/IP conformance tests on github.com/google/packetdrill.

Florian recently added support for packetdrill tests in nf_conntrack,
in commit a8a388c2aae49 ("selftests: netfilter: add packetdrill based
conntrack tests").

This patch takes a slightly different approach. It relies on
ksft_runner.sh to run every *.pkt file in the directory.

Any future imports of packetdrill tests should require no additional
coding. Just add the *.pkt files.

Initially import only two features/directories from github. One with a
single script, and one with two. This was the only reason to pick
tcp/inq and tcp/md5.

The path replaces the directory hierarchy in github with a flat space
of files: $(subst /,_,$(wildcard tcp/**/*.pkt)). This is the most
straightforward option to integrate with kselftests. The Linked thread
reviewed two ways to maintain the hierarchy: TEST_PROGS_RECURSE and
PRESERVE_TEST_DIRS. But both introduce significant changes to
kselftest infra and with that risk to existing tests.

Implementation notes:
- restore alphabetical order when adding the new directory to
tools/testing/selftests/Makefile
- imported *.pkt files and support verbatim from the github project,
except for
- update `source ./defaults.sh` path (to adjust for flat dir)
- add SPDX headers
- remove one author statement
- Acknowledgment: drop an e (checkpatch)

Tested:
make -C tools/testing/selftests \
TARGETS=net/packetdrill \
run_tests

make -C tools/testing/selftests \
TARGETS=net/packetdrill \
install INSTALL_PATH=$KSFT_INSTALL_PATH

# in virtme-ng
./run_kselftest.sh -c net/packetdrill
./run_kselftest.sh -t net/packetdrill:tcp_inq_client.pkt

Link: https://lore.kernel.org/netdev/[email protected]/
Signed-off-by: Willem de Bruijn <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

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selftests: rds: add testing infrastructure

This adds some basic self-testing infrastructure for RDS-TCP.

Signed-off-by: Vegard Nossum <[email protected]>
Signed-off-by: Chuck Lever <chuck.le

selftests: rds: add testing infrastructure

This adds some basic self-testing infrastructure for RDS-TCP.

Signed-off-by: Vegard Nossum <[email protected]>
Signed-off-by: Chuck Lever <[email protected]>
Signed-off-by: Allison Henderson <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

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selftest: acct: Add selftest for the acct() syscall

The acct() system call enables or disables process accounting.
If accounting is turned on, records for each terminating process
are appended to a

selftest: acct: Add selftest for the acct() syscall

The acct() system call enables or disables process accounting.
If accounting is turned on, records for each terminating process
are appended to a specified filename as it terminates. An argument of NULL
causes accounting to be turned off.

This patch will add a test for the acct() syscall.

Signed-off-by: Abdulrasaq Lawani <[email protected]>
Signed-off-by: Shuah Khan <[email protected]>

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selftests: user: remove user suite

The user test suite has only one test, test_user_copy which loads
test_user_copy module for testing. But test_user_copy module has already
been converted to kunit

selftests: user: remove user suite

The user test suite has only one test, test_user_copy which loads
test_user_copy module for testing. But test_user_copy module has already
been converted to kunit (see fixes). Hence remove the entire suite.

Fixes: cf6219ee889f ("usercopy: Convert test_user_copy to KUnit test")
Signed-off-by: Muhammad Usama Anjum <[email protected]>
Signed-off-by: Shuah Khan <[email protected]>

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kselftest: devices: Add test to detect device error logs

Log errors are the most widely used mechanism for reporting issues in
the kernel. When an error is logged using the device helpers, eg
dev_er

kselftest: devices: Add test to detect device error logs

Log errors are the most widely used mechanism for reporting issues in
the kernel. When an error is logged using the device helpers, eg
dev_err(), it gets metadata attached that identifies the subsystem and
device where the message is coming from. Introduce a new test that makes
use of that metadata to report which devices logged errors (or more
critical messages).

Signed-off-by: Nícolas F. R. A. Prado <[email protected]>
Acked-by: Shuah Khan <[email protected]>
Acked-by: Greg Kroah-Hartman <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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kselftest: Move ksft helper module to common directory

Move the ksft python module, which provides generic helpers for
kselftests, to a common directory so it can be more easily shared
between diffe

kselftest: Move ksft helper module to common directory

Move the ksft python module, which provides generic helpers for
kselftests, to a common directory so it can be more easily shared
between different tests.

Signed-off-by: Nícolas F. R. A. Prado <[email protected]>
Acked-by: Shuah Khan <[email protected]>
Acked-by: Greg Kroah-Hartman <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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kselftest: devices: Move discoverable devices test to subdirectory

Move the discoverable devices test to a subdirectory to allow other
related tests to be added to the devices directory.

Signed-off

kselftest: devices: Move discoverable devices test to subdirectory

Move the discoverable devices test to a subdirectory to allow other
related tests to be added to the devices directory.

Signed-off-by: Nícolas F. R. A. Prado <[email protected]>
Acked-by: Shuah Khan <[email protected]>
Acked-by: Greg Kroah-Hartman <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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selftests: ifs: verify test interfaces are created by the driver

IFS (In Field Scan) driver exposes its functionality via sysfs interfaces.
Applications prepare and exercise the tests by interacting

selftests: ifs: verify test interfaces are created by the driver

IFS (In Field Scan) driver exposes its functionality via sysfs interfaces.
Applications prepare and exercise the tests by interacting with the
aforementioned sysfs files.

Verify that the necessary sysfs entries are created after loading the IFS
driver.

Initialize test variables needed for building subsequent kself-test cases.

Reviewed-by: Jithu Joseph <[email protected]>
Reviewed-by: Kuppuswamy Sathyanarayanan <[email protected]>
Co-developed-by: Ashok Raj <[email protected]>
Signed-off-by: Ashok Raj <[email protected]>
Signed-off-by: Pengfei Xu <[email protected]>
Acked-by: Jithu Joseph <[email protected]>
Signed-off-by: Shuah Khan <[email protected]>

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Revert "selftests: Compile kselftest headers with -D_GNU_SOURCE"

This reverts commit daef47b89efd0b745e8478d69a3ad724bd8b4dc6.

This framework change to add D_GNU_SOURCE to KHDR_INCLUDES
to Makefile

Revert "selftests: Compile kselftest headers with -D_GNU_SOURCE"

This reverts commit daef47b89efd0b745e8478d69a3ad724bd8b4dc6.

This framework change to add D_GNU_SOURCE to KHDR_INCLUDES
to Makefile, lib.mk, and kselftest_harness.h is causing build
failures and warnings.

Revert this change.

Reported-by: Mark Brown <[email protected]>
Signed-off-by: Shuah Khan <[email protected]>

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selftests: Compile kselftest headers with -D_GNU_SOURCE

Add the -D_GNU_SOURCE flag to KHDR_INCLUDES so that it is defined in a
central location.

Commit 809216233555 ("selftests/harness: remove use

selftests: Compile kselftest headers with -D_GNU_SOURCE

Add the -D_GNU_SOURCE flag to KHDR_INCLUDES so that it is defined in a
central location.

Commit 809216233555 ("selftests/harness: remove use of LINE_MAX")
introduced asprintf into kselftest_harness.h, which is a GNU extension
and needs _GNU_SOURCE to either be defined prior to including headers or
with the -D_GNU_SOURCE flag passed to the compiler.

Fixed up commit log:
Shuah Khan <[email protected]>

Fixes: 809216233555 ("selftests/harness: remove use of LINE_MAX")
Reported-by: kernel test robot <[email protected]>
Closes: https://lore.kernel.org/oe-lkp/[email protected]
Signed-off-by: Edward Liaw <[email protected]>
Reviewed-by: Muhammad Usama Anjum <[email protected]>
Reviewed-by: Mark Brown <[email protected]>
Reviewed-by: John Hubbard <[email protected]>
Signed-off-by: Shuah Khan <[email protected]>

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selftests: drv-net-hw: support using Python from net hw tests

We created a separate directory for HW-only tests, recently.
Glue in the Python test library there, Python is a bit annoying
when it com

selftests: drv-net-hw: support using Python from net hw tests

We created a separate directory for HW-only tests, recently.
Glue in the Python test library there, Python is a bit annoying
when it comes to using library code located "lower"
in the directory structure.

Reuse the Env class, but let tests require non-nsim setup.

Reviewed-by: Willem de Bruijn <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

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selftests: virtio_net: add initial tests

Introduce initial tests for virtio_net driver. Focus on feature testing
leveraging previously introduced debugfs feature filtering
infrastructure. Add very b

selftests: virtio_net: add initial tests

Introduce initial tests for virtio_net driver. Focus on feature testing
leveraging previously introduced debugfs feature filtering
infrastructure. Add very basic ping and F_MAC feature tests.

To run this, do:
$ make -C tools/testing/selftests/ TARGETS=drivers/net/virtio_net/ run_tests

Run it on a system with 2 virtio_net devices connected back-to-back
on the hypervisor.

Signed-off-by: Jiri Pirko <[email protected]>
Reviewed-by: Petr Machata <[email protected]>
Tested-by: Benjamin Poirier <[email protected]>
Signed-off-by: Paolo Abeni <[email protected]>

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selftests: fix netfilter path in Makefile

Netfilter tests have been moved to a subdir under selftests/net by
patch series [1]. Fix the path in selftests/Makefile accordingly.

This helps fix the fol

selftests: fix netfilter path in Makefile

Netfilter tests have been moved to a subdir under selftests/net by
patch series [1]. Fix the path in selftests/Makefile accordingly.

This helps fix the following error:

tools/testing/selftests$ make
...
make[1]: Entering directory 'tools/testing/selftests'
make[1]: *** netfilter: No such file or directory. Stop.
make[1]: Leaving directory 'tools/testing/selftests'

[1] https://lore.kernel.org/all/[email protected]/

Reported-by: kernel test robot <[email protected]>
Signed-off-by: Yujie Liu <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

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selftests: drivers: add scaffolding for Netlink tests in Python

Add drivers/net as a target for mixed-use tests.
The setup is expected to work similarly to the forwarding tests.
Since we only need o

selftests: drivers: add scaffolding for Netlink tests in Python

Add drivers/net as a target for mixed-use tests.
The setup is expected to work similarly to the forwarding tests.
Since we only need one interface (unlike forwarding tests)
read the target device name from NETIF. If not present we'll
try to run the test against netdevsim.

Reviewed-by: Petr Machata <[email protected]>
Signed-off-by: Jakub Kicinski <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

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selftests: net: add scaffolding for Netlink tests in Python

Add glue code for accessing the YNL library which lives under
tools/net and YAML spec files from under Documentation/.
Automatically figur

selftests: net: add scaffolding for Netlink tests in Python

Add glue code for accessing the YNL library which lives under
tools/net and YAML spec files from under Documentation/.
Automatically figure out if tests are run in tree or not.
Since we'll want to use this library both from net and
drivers/net test targets make the library a target as well,
and automatically include it when net or drivers/net are
included. Making net/lib a target ensures that we end up
with only one copy of it, and saves us some path guessing.

Add a tiny bit of formatting support to be able to output KTAP
from the start.

Reviewed-by: Petr Machata <[email protected]>
Signed-off-by: Jakub Kicinski <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

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kselftest: Add basic test for probing the rust sample modules

Add new basic kselftest that checks if the available rust sample modules
can be added and removed correctly.

Signed-off-by: Laura Nao <

kselftest: Add basic test for probing the rust sample modules

Add new basic kselftest that checks if the available rust sample modules
can be added and removed correctly.

Signed-off-by: Laura Nao <[email protected]>
Reviewed-by: Sergio Gonzalez Collado <[email protected]>
Reviewed-by: Muhammad Usama Anjum <[email protected]>
Signed-off-by: Shuah Khan <[email protected]>

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