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selftests/powerpc: Make alignment handler test P9N DD2.1 vector CI load workaround 

BugLink: https://bugs.launchpad.net/bugs/1902694

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 5080332c2c ("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 <mikey@neuling.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201013043741.743413-2-mikey@neuling.org
(cherry picked from commit d1781f2370)
Signed-off-by: Patricia Domingues <patricia.domingues@canonical.com>
Acked-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
Acked-by: Stefan Bader <stefan.bader@canonical.com>
Signed-off-by: Ian May <ian.may@canonical.com>
This commit is contained in:
Michael Neuling 2020-11-04 02:27:51 -03:00 committed by Stefan Bader
parent 6483795dce
commit 6512f2455b
1 changed files with 6 additions and 2 deletions
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8
tools/testing/selftests/powerpc/alignment/alignment_handler.c
View File

@ -226,8 +226,12 @@ 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;