4185b3b9 - selftests/fpu: Add an FPU selftest

Thu, 18 Jun 2020 14:37:37 +0000

selftests/fpu: Add an FPU selftestAdd a selftest for the usage of FPU code in kernel mode.Currently only implemented for x86. In the future, kernel FPU testingcould be unified between the different architectures supporting it. [ bp: - Split out from a conglomerate patch, put comments over statements. - run the test only on debugfs write. - Add bare-minimum run_test_fpu.sh, run 1000 iterations on all CPUs by default. - Add conditionally -msse2 so that clang doesn't generate library calls. - Use cc-option to detect gcc 7.1 not supporting -mpreferred-stack-boundary=3 (amluto). - Document stuff so that we don't forget. - Fix: ld: lib/test_fpu.o: in function `test_fpu_get': >> test_fpu.c:(.text+0x16e): undefined reference to `__sanitizer_cov_trace_cmpd' >> ld: test_fpu.c:(.text+0x1a7): undefined reference to `__sanitizer_cov_trace_cmpd' ld: test_fpu.c:(.text+0x1e0): undefined reference to `__sanitizer_cov_trace_cmpd' ]Reported-by: kernel test robot Signed-off-by: Petteri Aimonen Signed-off-by: Borislav Petkov Reviewed-by: Nick Desaulniers Link: https://lkml.kernel.org/r/20200624114646.28953-3-bp@alien8.de List of files: /linux-6.15/tools/testing/selftests/fpu/Makefile

Changes in Makefile

4185b3b9 - selftests/fpu: Add an FPU selftest