Hi
this patchset aims to add the initial arch-specific arm64 support to kselftest starting with signals-related test-cases.
This series is based on v5.4-rc2.
A common internal test-case layout is proposed for signal tests and it is wired-up to the toplevel kselftest Makefile, so that it should be possible at the end to run it on an arm64 target in the usual way with KSFT.
~/linux# make TARGETS=arm64 kselftest
New KSFT arm64 testcases live inside tools/testing/selftests/arm64 grouped by family inside subdirectories: arm64/signal is the first family proposed with this series.
This series converts also to this subdirectory scheme the pre-existing KSFT arm64 tags tests (already merged in v5.3), moving them into their own arm64/tags subdirectory.
Thanks
Cristian
Notes: ----- - further details in the included READMEs
- more tests still to be written (current strategy is going through the related Kernel signal-handling code and write a test for each possible and sensible code-path) A few ideas for more TODO testcases: - mangle_pstate_invalid_ssbs_regs: mess with SSBS bits on every possible configured behavior - fake_sigreturn_unmapped_sp: SP into unmapped addrs - fake_sigreturn_kernelspace_sp: SP into kernel addrs - fake_sigreturn_sve_bad_extra_context: SVE extra context badly formed - fake_sigreturn_misaligned_sp_4: misaligned SP by 4 (i.e., __alignof__(struct _aarch64_ctx)) - fake_sigreturn_misaligned_sp_8: misaligned SP by 8 (i.e., sizeof(struct _aarch64_ctx)) - fake_sigreturn_bad_size_non_aligned: a size that doesn't overflow __reserved[], but is not a multiple of 16 - fake_sigreturn_bad_size_tiny: a size that is less than 16 - fake_sigreturn_bad_size_overflow_tiny: a size that does overflow __reserved[], but by less than 16 bytes? - mangle_sve_invalid_extra_context: SVE extra_context invalid
- SVE signal testcases and special handling will be part of an additional patch still to be released
- KSFT arm64 tags test patch https://lore.kernel.org/linux-arm-kernel/c1e6aad230658bc175b42d92daeff2e3005... is relocated into its own directory under tools/testing/selftests/arm64/tags
Changes: -------- v7-->v8: - removed SSBS test case - split remnants of SSBS patch (v7 05/11), containing some helpers, into two distinct patches
v6-->v7: - rebased on v5.4-rc2 - renamed SUBTARGETS arm64/ toplevel Makefile ENV to ARM64_SUBTARGETS - fixed fake_sigreturn alignment routines (off by one) - fixed SSBS test: avoid using MRS/MSR as whole and SKIP when SSBS not supported - reporting KSFT_SKIP when needed (usually if test_init(0 fails) - using ID_AA64PFR1_EL1.SSBS to check SSBS support instead of HWCAP_SSBS
v5-->v6: - added arm64 toplevel Makefile SUBTARGETS env var to be able to selectively build only some arm64/ tests subdirectories - removed unneed toplevel Makefile exports and fixed Copyright - better checks for supported features and features names helpers - converted some run-time critical assert() to abort() to avoid issues when -NDEBUG is set - default_handler() signal handler refactored and split - using SIGTRAP for get_current_context() - use volatile where proper - refactor and relocate test_init() invocation - review usage of MRS SSBS instructions depending on HW_SSBS - cleanup fake_sigreturn trampoline - cleanup get_starting_header helper - avoiding timeout test failures wherever possible (fail immediately if possible)
v4-->v5: - rebased on arm64/for-next-core merging 01/11 with KSFT tags tests: commit 9ce1263033cd ("selftests, arm64: add a selftest for passing tagged pointers to kernel") - moved .gitignore up on elevel - moved kernel header search mechanism into KSFT arm64 toplevel Makefile so that it can be used easily also by each arm64 KSFT subsystem inside subdirs of arm64
v3-->v4: - rebased on v5.3-rc6 - added test descriptions - fixed commit messages (imperative mood) - added missing includes and removed unneeded ones - added/used new get_starting_head() helper - fixed/simplified signal.S::fakke_sigreturn() - added set_regval() macro and .init initialization func - better synchonization in get_current_context() - macroization of mangle_pstate_invalid_mode_el - split mangle_pstate_invalid_mode_el h/t - removed standalone mode - simplified CPU features checks - fixed/refactored get_header() and validation routines - simplfied docs
v2-->v3: - rebased on v5.3-rc2 - better test result characterization looking for SEGV_ACCERR in si_code on SIGSEGV - using KSFT Framework macros for retvalues - removed SAFE_WRITE()/dump_uc: buggy, un-needed and unused - reviewed generation process of test_arm64_signals.sh runner script - re-added a fixed fake_sigreturn_misaligned_sp testcase and a properly extended fake_sigreturn() helper - added tests' TODO notes
v1-->v2: - rebased on 5.2-rc7 - various makefile's cleanups - mixed READMEs fixes - fixed test_arm64_signals.sh runner script - cleaned up assembly code in signal.S - improved get_current_context() logic - fixed SAFE_WRITE() - common support code split into more chunks, each one introduced when needed by some new testcases - fixed some headers validation routines in testcases.c - removed some still broken/immature tests: + fake_sigreturn_misaligned + fake_sigreturn_overflow_reserved + mangle_pc_invalid + mangle_sp_misaligned - fixed some other testcases: + mangle_pstate_ssbs_regs: better checks of SSBS bit when feature unsupported + mangle_pstate_invalid_compat_toggle: name fix + mangle_pstate_invalid_mode_el[1-3]: precautionary zeroing PSTATE.MODE + fake_sigreturn_bad_magic, fake_sigreturn_bad_size, fake_sigreturn_bad_size_for_magic0: - accounting for available space...dropping extra when needed - keeping alignent - new testcases on FPSMID context: + fake_sigreturn_missing_fpsimd + fake_sigreturn_duplicated_fpsimd
Cristian Marussi (12): kselftest: arm64: extend toplevel skeleton Makefile kselftest: arm64: mangle_pstate_invalid_compat_toggle and common utils kselftest: arm64: mangle_pstate_invalid_daif_bits kselftest: arm64: mangle_pstate_invalid_mode_el[123][ht] kselftest: arm64: extend test_init functionalities kselftest: arm64: add helper get_current_context kselftest: arm64: fake_sigreturn_bad_magic kselftest: arm64: fake_sigreturn_bad_size_for_magic0 kselftest: arm64: fake_sigreturn_missing_fpsimd kselftest: arm64: fake_sigreturn_duplicated_fpsimd kselftest: arm64: fake_sigreturn_bad_size kselftest: arm64: fake_sigreturn_misaligned_sp
tools/testing/selftests/Makefile | 1 + tools/testing/selftests/arm64/Makefile | 64 +++- tools/testing/selftests/arm64/README | 25 ++ .../testing/selftests/arm64/signal/.gitignore | 3 + tools/testing/selftests/arm64/signal/Makefile | 32 ++ tools/testing/selftests/arm64/signal/README | 59 +++ .../testing/selftests/arm64/signal/signals.S | 64 ++++ .../selftests/arm64/signal/test_signals.c | 29 ++ .../selftests/arm64/signal/test_signals.h | 116 ++++++ .../arm64/signal/test_signals_utils.c | 340 ++++++++++++++++++ .../arm64/signal/test_signals_utils.h | 120 +++++++ .../testcases/fake_sigreturn_bad_magic.c | 52 +++ .../testcases/fake_sigreturn_bad_size.c | 77 ++++ .../fake_sigreturn_bad_size_for_magic0.c | 46 +++ .../fake_sigreturn_duplicated_fpsimd.c | 50 +++ .../testcases/fake_sigreturn_misaligned_sp.c | 37 ++ .../testcases/fake_sigreturn_missing_fpsimd.c | 50 +++ .../mangle_pstate_invalid_compat_toggle.c | 31 ++ .../mangle_pstate_invalid_daif_bits.c | 35 ++ .../mangle_pstate_invalid_mode_el1h.c | 15 + .../mangle_pstate_invalid_mode_el1t.c | 15 + .../mangle_pstate_invalid_mode_el2h.c | 15 + .../mangle_pstate_invalid_mode_el2t.c | 15 + .../mangle_pstate_invalid_mode_el3h.c | 15 + .../mangle_pstate_invalid_mode_el3t.c | 15 + .../mangle_pstate_invalid_mode_template.h | 28 ++ .../arm64/signal/testcases/testcases.c | 196 ++++++++++ .../arm64/signal/testcases/testcases.h | 104 ++++++ tools/testing/selftests/arm64/tags/Makefile | 7 + .../arm64/{ => tags}/run_tags_test.sh | 0 .../selftests/arm64/{ => tags}/tags_test.c | 0 31 files changed, 1651 insertions(+), 5 deletions(-) create mode 100644 tools/testing/selftests/arm64/README create mode 100644 tools/testing/selftests/arm64/signal/.gitignore create mode 100644 tools/testing/selftests/arm64/signal/Makefile create mode 100644 tools/testing/selftests/arm64/signal/README create mode 100644 tools/testing/selftests/arm64/signal/signals.S create mode 100644 tools/testing/selftests/arm64/signal/test_signals.c create mode 100644 tools/testing/selftests/arm64/signal/test_signals.h create mode 100644 tools/testing/selftests/arm64/signal/test_signals_utils.c create mode 100644 tools/testing/selftests/arm64/signal/test_signals_utils.h create mode 100644 tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_bad_magic.c create mode 100644 tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_bad_size.c create mode 100644 tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_bad_size_for_magic0.c create mode 100644 tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_duplicated_fpsimd.c create mode 100644 tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_misaligned_sp.c create mode 100644 tools/testing/selftests/arm64/signal/testcases/fake_sigreturn_missing_fpsimd.c create mode 100644 tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_compat_toggle.c create mode 100644 tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_daif_bits.c create mode 100644 tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el1h.c create mode 100644 tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el1t.c create mode 100644 tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el2h.c create mode 100644 tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el2t.c create mode 100644 tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el3h.c create mode 100644 tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el3t.c create mode 100644 tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_template.h create mode 100644 tools/testing/selftests/arm64/signal/testcases/testcases.c create mode 100644 tools/testing/selftests/arm64/signal/testcases/testcases.h create mode 100644 tools/testing/selftests/arm64/tags/Makefile rename tools/testing/selftests/arm64/{ => tags}/run_tags_test.sh (100%) rename tools/testing/selftests/arm64/{ => tags}/tags_test.c (100%)