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| author | Mark Brown <broonie@kernel.org> | 2021-12-10 21:41:02 +0300 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2021-12-14 21:35:10 +0300 |
| commit | b77e995e3b9638e759d482e93deba1fa0760cb26 (patch) | |
| tree | c38599762bc0737c4039ada1f3ab53da5e3286ef /tools/testing/selftests/arm64/Makefile | |
| parent | 9331a604858a0f399ef8f886a88dd94927f136aa (diff) | |
| download | linux-b77e995e3b9638e759d482e93deba1fa0760cb26.tar.xz | |
kselftest/arm64: Add a test program to exercise the syscall ABI
Currently we don't have any coverage of the syscall ABI so let's add a very
dumb test program which sets up register patterns, does a sysscall and then
checks that the register state after the syscall matches what we expect.
The program is written in an extremely simplistic fashion with the goal of
making it easy to verify that it's doing what it thinks it's doing, it is
not a model of how one should write actual code.
Currently we validate the general purpose, FPSIMD and SVE registers. There
are other thing things that could be covered like FPCR and flags registers,
these can be covered incrementally - my main focus at the minute is
covering the ABI for the SVE registers.
The program repeats the tests for all possible SVE vector lengths in case
some vector length specific optimisation causes issues, as well as testing
FPSIMD only. It tries two syscalls, getpid() and sched_yield(), in an
effort to cover both immediate return to userspace and scheduling another
task though there are no guarantees which cases will be hit.
A new test directory "abi" is added to hold the test, it doesn't seem to
fit well into any of the existing directories.
Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20211210184133.320748-7-broonie@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'tools/testing/selftests/arm64/Makefile')
| -rw-r--r-- | tools/testing/selftests/arm64/Makefile | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/testing/selftests/arm64/Makefile b/tools/testing/selftests/arm64/Makefile index ced910fb4019..1e8d9a8f59df 100644 --- a/tools/testing/selftests/arm64/Makefile +++ b/tools/testing/selftests/arm64/Makefile @@ -4,7 +4,7 @@ ARCH ?= $(shell uname -m 2>/dev/null || echo not) ifneq (,$(filter $(ARCH),aarch64 arm64)) -ARM64_SUBTARGETS ?= tags signal pauth fp mte bti +ARM64_SUBTARGETS ?= tags signal pauth fp mte bti abi else ARM64_SUBTARGETS := endif |