kernel/tools/testing/selftests/arm64/fp/za-test.S, branch linux-6.2.y

kselftest/arm64: Install signal handlers before output in FP stress tests

2022-09-07T13:25:31Z

To interface more robustly with other processes install the signal handers in the floating point stress tests before we produce any output, this means that a parent process can know that if it has seen any output from the test then the test is ready to handle incoming signals. Signed-off-by: Mark Brown Link: https://lore.kernel.org/r/20220906220056.820295-1-broonie@kernel.org Signed-off-by: Catalin Marinas

kselftest/arm64: Count SIGUSR2 deliveries in FP stress tests

2022-09-06T17:31:41Z

Currently the floating point stress tests mostly support testing that the data they are checking can be disrupted from a signal handler triggered by SIGUSR1. This is not properly implemented for all the tests and in testing is frequently modified to just handle the signal without corrupting data in order to ensure that signal handling does not corrupt data. Directly support this usage by installing a SIGUSR2 handler which simply counts the signal delivery. Signed-off-by: Mark Brown Link: https://lore.kernel.org/r/20220829154452.824870-3-broonie@kernel.org Signed-off-by: Catalin Marinas

kselftest/arm64: Always encourage preemption for za-test

2022-09-06T17:31:41Z

Since we now have an explicit test for the syscall ABI there is no need for za-test to cover getpid() so just unconditionally do sched_yield() like we do in fpsimd-test. Signed-off-by: Mark Brown Link: https://lore.kernel.org/r/20220829154452.824870-2-broonie@kernel.org Signed-off-by: Catalin Marinas

kselftest/arm64: Add stress test for SME ZA context switching

2022-04-28T16:57:12Z

Add a stress test for context switching of the ZA register state based on the similar tests Dave Martin wrote for FPSIMD and SVE registers. The test loops indefinitely writing a data pattern to ZA then reading it back and verifying that it's what was expected. Unlike the other tests we manually assemble the SME instructions since at present no released toolchain has SME support integrated. Signed-off-by: Mark Brown Reviewed-by: Shuah Khan Acked-by: Catalin Marinas Link: https://lore.kernel.org/r/20220419112247.711548-35-broonie@kernel.org Signed-off-by: Catalin Marinas