April 2025 - Linux-kselftest-mirror

[PATCH v2] kunit: tool: Implement listing of available architectures

by Thomas Weißschuh

To implement custom scripting around kunit.py it is useful to get a list of available architectures. While it is possible to manually inspect tools/testing/kunit/qemu_configs/, this is annoying to implement and introduces a dependency on a kunit.py implementation detail. Introduce 'kunit.py run --arch help' which lists all known architectures in an easy to parse list. This is equivalent on how QEMU implements listing of possible argument values. Signed-off-by: Thomas Weißschuh <thomas.weissschuh(a)linutronix.de> Reviewed-by: Rae Moar <rmoar(a)google.com> --- Changes in v2: - Pick up review from Rae - Link to v1: https://lore.kernel.org/r/20250220-kunit-list-v1-1-40b9d56417ee@linutronix.… --- Documentation/dev-tools/kunit/run_wrapper.rst | 2 ++ tools/testing/kunit/kunit_kernel.py | 8 ++++++++ 2 files changed, 10 insertions(+) diff --git a/Documentation/dev-tools/kunit/run_wrapper.rst b/Documentation/dev-tools/kunit/run_wrapper.rst index 19ddf5e07013314c608b570e297a8ff79a8efe7f..6697c71ee8ca020b8ac7e91b46e29ab082d9dea0 100644 --- a/Documentation/dev-tools/kunit/run_wrapper.rst +++ b/Documentation/dev-tools/kunit/run_wrapper.rst @@ -182,6 +182,8 @@ via UML. To run tests on qemu, by default it requires two flags: is ignored), the tests will run via UML. Non-UML architectures, for example: i386, x86_64, arm and so on; run on qemu. + ``--arch help`` lists all valid ``--arch`` values. + - ``--cross_compile``: Specifies the Kbuild toolchain. It passes the same argument as passed to the ``CROSS_COMPILE`` variable used by Kbuild. As a reminder, this will be the prefix for the toolchain diff --git a/tools/testing/kunit/kunit_kernel.py b/tools/testing/kunit/kunit_kernel.py index d3f39bc1ceec7eab23925ff1b852e996a715f3d5..260d8d9aa1db4ac3c04fa755fb738dd834b976db 100644 --- a/tools/testing/kunit/kunit_kernel.py +++ b/tools/testing/kunit/kunit_kernel.py @@ -14,6 +14,7 @@ import os import shlex import shutil import signal +import sys import threading from typing import Iterator, List, Optional, Tuple from types import FrameType @@ -201,6 +202,13 @@ def _default_qemu_config_path(arch: str) -> str: return config_path options = [f[:-3] for f in os.listdir(QEMU_CONFIGS_DIR) if f.endswith('.py')] + + if arch == 'help': + print('um') + for option in options: + print(option) + sys.exit() + raise ConfigError(arch + ' is not a valid arch, options are ' + str(sorted(options))) def _get_qemu_ops(config_path: str, --- base-commit: 8ffd015db85fea3e15a77027fda6c02ced4d2444 change-id: 20250220-kunit-list-552a8cdc011e Best regards, -- Thomas Weißschuh <thomas.weissschuh(a)linutronix.de>

2 months

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[PATCH net-next v2 0/8] mptcp: various small and unrelated improvements

by Matthieu Baerts (NGI0)

Here are various unrelated patches: - Patch 1: sched: remove unused structure. - Patch 2: sched: split the validation part, a preparation for later. - Patch 3: pm: clarify code, not to think there is a possible UaF. Note: a previous version has already been sent individually to Netdev. - Patch 4: subflow: simplify subflow_hmac_valid by passing subflow_req. - Patch 5: mib: add counter for MPJoin rejected by the PM. - Patch 6: selftests: validate this new MPJoinRejected counter. - Patch 7: selftests: define nlh variable only where needed. - Patch 8: selftests: show how to use IPPROTO_MPTCP with getaddrinfo. Note: a previous version has already been sent individually to Netdev. Signed-off-by: Matthieu Baerts (NGI0) <matttbe(a)kernel.org> --- Changes in v2: - Force b4 to use 'git show' with '--no-mailmap' not to modify patches 2 and 7/8. The code has not been modified. - Link to v1: https://lore.kernel.org/r/20250411-net-next-mptcp-sched-mib-sft-misc-v1-0-8… --- Geliang Tang (2): mptcp: sched: split validation part selftests: mptcp: diag: drop nlh parameter of recv_nlmsg Matthieu Baerts (NGI0) (4): mptcp: sched: remove mptcp_sched_data mptcp: pass right struct to subflow_hmac_valid mptcp: add MPJoinRejected MIB counter selftests: mptcp: validate MPJoinRejected counter Thorsten Blum (1): mptcp: pm: Return local variable instead of freed pointer zhenwei pi (1): selftests: mptcp: use IPPROTO_MPTCP for getaddrinfo include/net/mptcp.h | 13 ++------- net/mptcp/mib.c | 1 + net/mptcp/mib.h | 1 + net/mptcp/pm.c | 5 +++- net/mptcp/protocol.c | 4 ++- net/mptcp/protocol.h | 1 + net/mptcp/sched.c | 35 ++++++++++++++--------- net/mptcp/subflow.c | 12 ++++---- tools/testing/selftests/net/mptcp/mptcp_connect.c | 21 +++++++++++--- tools/testing/selftests/net/mptcp/mptcp_diag.c | 7 ++--- tools/testing/selftests/net/mptcp/mptcp_join.sh | 26 +++++++++++++---- 11 files changed, 80 insertions(+), 46 deletions(-) --- base-commit: 6a325aed130bb68790e765f923e76ec5669d2da7 change-id: 20250411-net-next-mptcp-sched-mib-sft-misc-25f5a6218fd8 Best regards, -- Matthieu Baerts (NGI0) <matttbe(a)kernel.org>

2 months

2
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[PATCH bpf-next 0/2] bpf: Allow access to const void pointer arguments in tracing programs

by KaFai Wan

hi, Tracing programs can access arguments via BTF [1]. Currently we allow tracing programs to access pointers to string (char pointer), void pointers, pointers to structs, and int pointers [2]. If we try to access argument which is pointer to const void like 2nd argument in kfree, it's an UNKNOWN type, verifier will fail to load. typedef void (*btf_trace_kfree)(void *, long unsigned int, const void *); [1] https://lore.kernel.org/bpf/20191016032505.2089704-7-ast@kernel.org/ [2] https://lore.kernel.org/bpf/20211208193245.172141-1-jolsa@kernel.org/ --- KaFai Wan (2): bpf: Allow access to const void pointer arguments in tracing programs selftests/bpf: Add test to access const void pointer argument in tracing program kernel/bpf/btf.c | 10 +++++++++- .../selftests/bpf/progs/verifier_btf_ctx_access.c | 9 +++++++++ 2 files changed, 18 insertions(+), 1 deletion(-) -- 2.43.0

2 months

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[PATCH v4 2/2] rcutorture: Fix issue with re-using old images on ARM64

by Joel Fernandes

On ARM64, when running with --configs '36*SRCU-P', I noticed that only 1 instance instead of 36 for starting. Fix it by checking for Image files, instead of bzImage which ARM does not seem to have. With this I see all 36 instances running at the same time in the batch. Tested-by: Paul E. McKenney <paulmck(a)kernel.org> Signed-off-by: Joel Fernandes <joelagnelf(a)nvidia.com> --- kernel/rcu/rcutorture.c | 3 ++- tools/testing/selftests/rcutorture/bin/kvm-test-1-run.sh | 2 +- 2 files changed, 3 insertions(+), 2 deletions(-) diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c index 74de92c3a9ab..df6504a855aa 100644 --- a/kernel/rcu/rcutorture.c +++ b/kernel/rcu/rcutorture.c @@ -2412,7 +2412,8 @@ rcu_torture_stats_print(void) pipesummary[i] += READ_ONCE(per_cpu(rcu_torture_count, cpu)[i]); batchsummary[i] += READ_ONCE(per_cpu(rcu_torture_batch, cpu)[i]); } - n_gpwraps += cur_ops->get_gpwrap_count(cpu); + if (cur_ops->get_gpwrap_count) + n_gpwraps += cur_ops->get_gpwrap_count(cpu); } for (i = RCU_TORTURE_PIPE_LEN; i >= 0; i--) { if (pipesummary[i] != 0) diff --git a/tools/testing/selftests/rcutorture/bin/kvm-test-1-run.sh b/tools/testing/selftests/rcutorture/bin/kvm-test-1-run.sh index ad79784e552d..957800c9ffba 100755 --- a/tools/testing/selftests/rcutorture/bin/kvm-test-1-run.sh +++ b/tools/testing/selftests/rcutorture/bin/kvm-test-1-run.sh @@ -73,7 +73,7 @@ config_override_param "$config_dir/CFcommon.$(uname -m)" KcList \ cp $T/KcList $resdir/ConfigFragment base_resdir=`echo $resdir | sed -e 's/\.[0-9]\+$//'` -if test "$base_resdir" != "$resdir" && test -f $base_resdir/bzImage && test -f $base_resdir/vmlinux +if test "$base_resdir" != "$resdir" && (test -f $base_resdir/bzImage || test -f $base_resdir/Image) && test -f $base_resdir/vmlinux then # Rerunning previous test, so use that test's kernel. QEMU="`identify_qemu $base_resdir/vmlinux`" -- 2.43.0

2 months

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[PATCH 0/2] kunit: qemu_configs: Add PowerPC 32-bit BE and 64-bit LE

by Thomas Weißschuh

Add basic configs to run kunit tests on some more PowerPC variants. Signed-off-by: Thomas Weißschuh <thomas.weissschuh(a)linutronix.de> --- Thomas Weißschuh (2): kunit: qemu_configs: powerpc: Explicitly enable CONFIG_CPU_BIG_ENDIAN=y kunit: qemu_configs: Add PowerPC 32-bit BE and 64-bit LE tools/testing/kunit/qemu_configs/powerpc.py | 1 + tools/testing/kunit/qemu_configs/powerpc32.py | 17 +++++++++++++++++ tools/testing/kunit/qemu_configs/powerpcle.py | 14 ++++++++++++++ 3 files changed, 32 insertions(+) --- base-commit: 0af2f6be1b4281385b618cb86ad946eded089ac8 change-id: 20250220-kunit-ppc-3744e371112f Best regards, -- Thomas Weißschuh <thomas.weissschuh(a)linutronix.de>

2 months

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[PATCH RFT v15 0/8] fork: Support shadow stacks in clone3()

by Mark Brown

The kernel has recently added support for shadow stacks, currently x86 only using their CET feature but both arm64 and RISC-V have equivalent features (GCS and Zicfiss respectively), I am actively working on GCS[1]. With shadow stacks the hardware maintains an additional stack containing only the return addresses for branch instructions which is not generally writeable by userspace and ensures that any returns are to the recorded addresses. This provides some protection against ROP attacks and making it easier to collect call stacks. These shadow stacks are allocated in the address space of the userspace process. Our API for shadow stacks does not currently offer userspace any flexiblity for managing the allocation of shadow stacks for newly created threads, instead the kernel allocates a new shadow stack with the same size as the normal stack whenever a thread is created with the feature enabled. The stacks allocated in this way are freed by the kernel when the thread exits or shadow stacks are disabled for the thread. This lack of flexibility and control isn't ideal, in the vast majority of cases the shadow stack will be over allocated and the implicit allocation and deallocation is not consistent with other interfaces. As far as I can tell the interface is done in this manner mainly because the shadow stack patches were in development since before clone3() was implemented. Since clone3() is readily extensible let's add support for specifying a shadow stack when creating a new thread or process, keeping the current implicit allocation behaviour if one is not specified either with clone3() or through the use of clone(). The user must provide a shadow stack pointer, this must point to memory mapped for use as a shadow stackby map_shadow_stack() with an architecture specified shadow stack token at the top of the stack. Please note that the x86 portions of this code are build tested only, I don't appear to have a system that can run CET available to me. [1] https://lore.kernel.org/linux-arm-kernel/20241001-arm64-gcs-v13-0-222b78d87… Signed-off-by: Mark Brown <broonie(a)kernel.org> --- Changes in v15: - Rebase onto v6.15-rc1. - Link to v14: https://lore.kernel.org/r/20250206-clone3-shadow-stack-v14-0-805b53af73b9@k… Changes in v14: - Rebase onto v6.14-rc1. - Link to v13: https://lore.kernel.org/r/20241203-clone3-shadow-stack-v13-0-93b89a81a5ed@k… Changes in v13: - Rebase onto v6.13-rc1. - Link to v12: https://lore.kernel.org/r/20241031-clone3-shadow-stack-v12-0-7183eb8bee17@k… Changes in v12: - Add the regular prctl() to the userspace API document since arm64 support is queued in -next. - Link to v11: https://lore.kernel.org/r/20241005-clone3-shadow-stack-v11-0-2a6a2bd6d651@k… Changes in v11: - Rebase onto arm64 for-next/gcs, which is based on v6.12-rc1, and integrate arm64 support. - Rework the interface to specify a shadow stack pointer rather than a base and size like we do for the regular stack. - Link to v10: https://lore.kernel.org/r/20240821-clone3-shadow-stack-v10-0-06e8797b9445@k… Changes in v10: - Integrate fixes & improvements for the x86 implementation from Rick Edgecombe. - Require that the shadow stack be VM_WRITE. - Require that the shadow stack base and size be sizeof(void *) aligned. - Clean up trailing newline. - Link to v9: https://lore.kernel.org/r/20240819-clone3-shadow-stack-v9-0-962d74f99464@ke… Changes in v9: - Pull token validation earlier and report problems with an error return to parent rather than signal delivery to the child. - Verify that the top of the supplied shadow stack is VM_SHADOW_STACK. - Rework token validation to only do the page mapping once. - Drop no longer needed support for testing for signals in selftest. - Fix typo in comments. - Link to v8: https://lore.kernel.org/r/20240808-clone3-shadow-stack-v8-0-0acf37caf14c@ke… Changes in v8: - Fix token verification with user specified shadow stack. - Don't track user managed shadow stacks for child processes. - Link to v7: https://lore.kernel.org/r/20240731-clone3-shadow-stack-v7-0-a9532eebfb1d@ke… Changes in v7: - Rebase onto v6.11-rc1. - Typo fixes. - Link to v6: https://lore.kernel.org/r/20240623-clone3-shadow-stack-v6-0-9ee7783b1fb9@ke… Changes in v6: - Rebase onto v6.10-rc3. - Ensure we don't try to free the parent shadow stack in error paths of x86 arch code. - Spelling fixes in userspace API document. - Additional cleanups and improvements to the clone3() tests to support the shadow stack tests. - Link to v5: https://lore.kernel.org/r/20240203-clone3-shadow-stack-v5-0-322c69598e4b@ke… Changes in v5: - Rebase onto v6.8-rc2. - Rework ABI to have the user allocate the shadow stack memory with map_shadow_stack() and a token. - Force inlining of the x86 shadow stack enablement. - Move shadow stack enablement out into a shared header for reuse by other tests. - Link to v4: https://lore.kernel.org/r/20231128-clone3-shadow-stack-v4-0-8b28ffe4f676@ke… Changes in v4: - Formatting changes. - Use a define for minimum shadow stack size and move some basic validation to fork.c. - Link to v3: https://lore.kernel.org/r/20231120-clone3-shadow-stack-v3-0-a7b8ed3e2acc@ke… Changes in v3: - Rebase onto v6.7-rc2. - Remove stale shadow_stack in internal kargs. - If a shadow stack is specified unconditionally use it regardless of CLONE_ parameters. - Force enable shadow stacks in the selftest. - Update changelogs for RISC-V feature rename. - Link to v2: https://lore.kernel.org/r/20231114-clone3-shadow-stack-v2-0-b613f8681155@ke… Changes in v2: - Rebase onto v6.7-rc1. - Remove ability to provide preallocated shadow stack, just specify the desired size. - Link to v1: https://lore.kernel.org/r/20231023-clone3-shadow-stack-v1-0-d867d0b5d4d0@ke… --- Mark Brown (8): arm64/gcs: Return a success value from gcs_alloc_thread_stack() Documentation: userspace-api: Add shadow stack API documentation selftests: Provide helper header for shadow stack testing fork: Add shadow stack support to clone3() selftests/clone3: Remove redundant flushes of output streams selftests/clone3: Factor more of main loop into test_clone3() selftests/clone3: Allow tests to flag if -E2BIG is a valid error code selftests/clone3: Test shadow stack support Documentation/userspace-api/index.rst | 1 + Documentation/userspace-api/shadow_stack.rst | 44 +++++ arch/arm64/include/asm/gcs.h | 8 +- arch/arm64/kernel/process.c | 8 +- arch/arm64/mm/gcs.c | 62 +++++- arch/x86/include/asm/shstk.h | 11 +- arch/x86/kernel/process.c | 2 +- arch/x86/kernel/shstk.c | 57 +++++- include/asm-generic/cacheflush.h | 11 ++ include/linux/sched/task.h | 17 ++ include/uapi/linux/sched.h | 10 +- kernel/fork.c | 96 +++++++-- tools/testing/selftests/clone3/clone3.c | 226 ++++++++++++++++++---- tools/testing/selftests/clone3/clone3_selftests.h | 65 ++++++- tools/testing/selftests/ksft_shstk.h | 98 ++++++++++ 15 files changed, 635 insertions(+), 81 deletions(-) --- base-commit: 0af2f6be1b4281385b618cb86ad946eded089ac8 change-id: 20231019-clone3-shadow-stack-15d40d2bf536 Best regards, -- Mark Brown <broonie(a)kernel.org>

2 months

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[PATCH] selftests: rtnetlink: Fix bridge_parent_id failure on interface state

by Alok Tiwari

The selftest "kci_test_bridge_parent_id" fails with the error: "Device can not be enslaved while up" when trying to attach interfaces (`eni10np1`, `eni20np1`) to a bonding device (`test-bond0`) while the interfaces are in the UP state. Failure log: COMMAND: ip link set dev eni10np1 master test-bond0 Error: Device can not be enslaved while up. COMMAND: ip link set dev eni20np1 master test-bond0 Error: Device can not be enslaved while up. FAIL: bridge_parent_id This behavior aligns with bonding driver requirements, where a slave interface must be in the DOWN state before being enslaved. This was reinforced in upstream commit: 'ec4ffd100ffb ("Revert 'net: rtnetlink: Enslave device before bringing it up'")'. This patch updates the test to bring interfaces down explicitly before adding them to the bonding device: ip link set dev <iface> master <bond> down After applying this fix, the test passes successfully: Success log: COMMAND: ip link set dev eni10np1 master test-bond0 down COMMAND: ip link set dev eni20np1 master test-bond0 down PASS: bridge_parent_id Fixes: 9c2a19f71515 ("kselftest: rtnetlink.sh: add verbose flag") Note: This commit introduced 'run_cmd', which exposed this failure in the bridge_parent_id test output. Signed-off-by: Alok Tiwari <alok.a.tiwari(a)oracle.com> --- tools/testing/selftests/net/rtnetlink.sh | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/net/rtnetlink.sh b/tools/testing/selftests/net/rtnetlink.sh index 2e8243a65b50..ddae704c8faa 100755 --- a/tools/testing/selftests/net/rtnetlink.sh +++ b/tools/testing/selftests/net/rtnetlink.sh @@ -1103,8 +1103,8 @@ kci_test_bridge_parent_id() dev10=`ls ${sysfsnet}10/net/` dev20=`ls ${sysfsnet}20/net/` run_cmd ip link add name test-bond0 type bond mode 802.3ad - run_cmd ip link set dev $dev10 master test-bond0 - run_cmd ip link set dev $dev20 master test-bond0 + run_cmd ip link set dev $dev10 master test-bond0 down + run_cmd ip link set dev $dev20 master test-bond0 down run_cmd ip link add name test-br0 type bridge run_cmd ip link set dev test-bond0 master test-br0 -- 2.47.1

2 months

2
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[PATCH] selftests/mm: Restore default nr_hugepages value during cleanup in hugetlb_reparenting_test.sh

by Donet Tom

During cleanup, the value of /proc/sys/vm/nr_hugepages is currently being set to 0. At the end of the test, if all tests pass, the original nr_hugepages value is restored. However, if any test fails, it remains set to 0. With this patch, we ensure that the original nr_hugepages value is restored during cleanup, regardless of whether the test passes or fails. Fixes: 29750f71a9b4 ("hugetlb_cgroup: add hugetlb_cgroup reservation tests") Signed-off-by: Donet Tom <donettom(a)linux.ibm.com> --- tools/testing/selftests/mm/hugetlb_reparenting_test.sh | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/mm/hugetlb_reparenting_test.sh b/tools/testing/selftests/mm/hugetlb_reparenting_test.sh index 11f9bbe7dc22..114875a2b018 100755 --- a/tools/testing/selftests/mm/hugetlb_reparenting_test.sh +++ b/tools/testing/selftests/mm/hugetlb_reparenting_test.sh @@ -56,7 +56,7 @@ function cleanup() { rmdir "$CGROUP_ROOT"/a/b 2>/dev/null rmdir "$CGROUP_ROOT"/a 2>/dev/null rmdir "$CGROUP_ROOT"/test1 2>/dev/null - echo 0 >/proc/sys/vm/nr_hugepages + echo $nr_hugepgs >/proc/sys/vm/nr_hugepages set -e } -- 2.47.1

2 months

3
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[PATCH v3 0/2] kunit: qemu_configs: Add MIPS configurations

by Thomas Weißschuh

Add basic support to run various MIPS variants via kunit_tool using the virtualized malta platform. Some of the cs_dsp unittests are broken. They are being disabled by default in the series "Fix up building KUnit tests for Cirrus Logic modules" [0]. [0] https://lore.kernel.org/lkml/20250411123608.1676462-1-rf@opensource.cirrus.… Signed-off-by: Thomas Weißschuh <thomas.weissschuh(a)linutronix.de> --- Changes in v3: - Also skip VDSO_RANDOMIZE_SIZE adjustment for kthreads - Link to v2: https://lore.kernel.org/r/20250414-kunit-mips-v2-0-4cf01e1a29e6@linutronix.… Changes in v2: - Fix usercopy kunit test by handling ABI-less tasks in stack_top() - Drop change to mm initialization. The broken test is not built by default anymore. - Link to v1: https://lore.kernel.org/r/20250212-kunit-mips-v1-0-eb49c9d76615@linutronix.… --- Thomas Weißschuh (2): MIPS: Don't crash in stack_top() for tasks without ABI or vDSO kunit: qemu_configs: Add MIPS configurations arch/mips/kernel/process.c | 16 +++++++++------- tools/testing/kunit/qemu_configs/mips.py | 18 ++++++++++++++++++ tools/testing/kunit/qemu_configs/mips64.py | 19 +++++++++++++++++++ tools/testing/kunit/qemu_configs/mips64el.py | 19 +++++++++++++++++++ tools/testing/kunit/qemu_configs/mipsel.py | 18 ++++++++++++++++++ 5 files changed, 83 insertions(+), 7 deletions(-) --- base-commit: 0466dc03fa779373afb807ce7496c404d98ace4b change-id: 20241014-kunit-mips-e4fe1c265ed7 Best regards, -- Thomas Weißschuh <thomas.weissschuh(a)linutronix.de>

2 months

3
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[PATCH v8 0/4] KVM: selftests: Add LoongArch support

by Bibo Mao

This patchset adds KVM selftests for LoongArch system, currently only some common test cases are supported and pass to run. These testcase are listed as following: coalesced_io_test demand_paging_test dirty_log_perf_test dirty_log_test guest_print_test hardware_disable_test kvm_binary_stats_test kvm_create_max_vcpus kvm_page_table_test memslot_modification_stress_test memslot_perf_test set_memory_region_test This patchset originally is posted from zhaotianrui, I continue to work on his efforts. --- Changes in v8: 1. Porting patch based on the latest version. 2. For macro PC_OFFSET_EXREGS, offsetof() method is used for C header file, still hardcoded definition for assemble language. Changes in v7: 1. Refine code to add LoongArch support in test case set_memory_region_test. Changes in v6: 1. Refresh the patch based on latest kernel 6.8-rc1, add LoongArch support about testcase set_memory_region_test. 2. Add hardware_disable_test test case. 3. Drop modification about macro DEFAULT_GUEST_TEST_MEM, it is problem of LoongArch binutils, this issue is raised to LoongArch binutils owners. Changes in v5: 1. In LoongArch kvm self tests, the DEFAULT_GUEST_TEST_MEM could be 0x130000000, it is different from the default value in memstress.h. So we Move the definition of DEFAULT_GUEST_TEST_MEM into LoongArch ucall.h, and add 'ifndef' condition for DEFAULT_GUEST_TEST_MEM in memstress.h. Changes in v4: 1. Remove the based-on flag, as the LoongArch KVM patch series have been accepted by Linux kernel, so this can be applied directly in kernel. Changes in v3: 1. Improve implementation of LoongArch VM page walk. 2. Add exception handler for LoongArch. 3. Add dirty_log_test, dirty_log_perf_test, guest_print_test test cases for LoongArch. 4. Add __ASSEMBLER__ macro to distinguish asm file and c file. 5. Move ucall_arch_do_ucall to the header file and make it as static inline to avoid function calls. 6. Change the DEFAULT_GUEST_TEST_MEM base addr for LoongArch. Changes in v2: 1. We should use ".balign 4096" to align the assemble code with 4K in exception.S instead of "align 12". 2. LoongArch only supports 3 or 4 levels page tables, so we remove the hanlders for 2-levels page table. 3. Remove the DEFAULT_LOONGARCH_GUEST_STACK_VADDR_MIN and use the common DEFAULT_GUEST_STACK_VADDR_MIN to allocate stack memory in guest. 4. Reorganize the test cases supported by LoongArch. 5. Fix some code comments. 6. Add kvm_binary_stats_test test case into LoongArch KVM selftests. --- Bibo Mao (4): KVM: selftests: Add KVM selftests header files for LoongArch KVM: selftests: Add core KVM selftests support for LoongArch KVM: selftests: Add ucall test support for LoongArch KVM: selftests: Add test cases for LoongArch tools/testing/selftests/kvm/Makefile | 2 +- tools/testing/selftests/kvm/Makefile.kvm | 18 + .../testing/selftests/kvm/include/kvm_util.h | 5 + .../kvm/include/loongarch/kvm_util_arch.h | 7 + .../kvm/include/loongarch/processor.h | 138 +++++++ .../selftests/kvm/include/loongarch/ucall.h | 20 + .../selftests/kvm/lib/loongarch/exception.S | 59 +++ .../selftests/kvm/lib/loongarch/processor.c | 349 ++++++++++++++++++ .../selftests/kvm/lib/loongarch/ucall.c | 38 ++ .../selftests/kvm/set_memory_region_test.c | 2 +- 10 files changed, 636 insertions(+), 2 deletions(-) create mode 100644 tools/testing/selftests/kvm/include/loongarch/kvm_util_arch.h create mode 100644 tools/testing/selftests/kvm/include/loongarch/processor.h create mode 100644 tools/testing/selftests/kvm/include/loongarch/ucall.h create mode 100644 tools/testing/selftests/kvm/lib/loongarch/exception.S create mode 100644 tools/testing/selftests/kvm/lib/loongarch/processor.c create mode 100644 tools/testing/selftests/kvm/lib/loongarch/ucall.c base-commit: 0af2f6be1b4281385b618cb86ad946eded089ac8 -- 2.39.3

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Linux-kselftest-mirror April 2025