From d1781f23704707d350b8c9006e2bdf5394bf91b2 Mon Sep 17 00:00:00 2001 From: Michael Neuling Date: Tue, 13 Oct 2020 15:37:41 +1100 Subject: selftests/powerpc: Make alignment handler test P9N DD2.1 vector CI load workaround alignment_handler currently only tests the unaligned cases but it can also be useful for testing the workaround for the P9N DD2.1 vector CI load issue fixed by p9_hmi_special_emu(). This workaround was introduced in 5080332c2c89 ("powerpc/64s: Add workaround for P9 vector CI load issue"). This changes the loop to start from offset 0 rather than 1 so that we test the kernel emulation in p9_hmi_special_emu(). Signed-off-by: Michael Neuling Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20201013043741.743413-2-mikey@neuling.org --- tools/testing/selftests/powerpc/alignment/alignment_handler.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/powerpc/alignment/alignment_handler.c b/tools/testing/selftests/powerpc/alignment/alignment_handler.c index 2a0503bc7e49..cb53a8b777e6 100644 --- a/tools/testing/selftests/powerpc/alignment/alignment_handler.c +++ b/tools/testing/selftests/powerpc/alignment/alignment_handler.c @@ -266,8 +266,12 @@ int do_test(char *test_name, void (*test_func)(char *, char *)) } rc = 0; - /* offset = 0 no alignment fault, so skip */ - for (offset = 1; offset < 16; offset++) { + /* + * offset = 0 is aligned but tests the workaround for the P9N + * DD2.1 vector CI load issue (see 5080332c2c89 "powerpc/64s: + * Add workaround for P9 vector CI load issue") + */ + for (offset = 0; offset < 16; offset++) { width = 16; /* vsx == 16 bytes */ r = 0; -- cgit v1.2.3