linux_dsm_epyc7002/tools/testing/selftests/powerpc
Cyril Bur 605df8d674 selftests/powerpc: Replace stxvx and lxvx with stxvd2x/lxvd2x
On POWER8 (ISA 2.07) lxvx and stxvx are defined to be extended mnemonics
of lxvd2x and stxvd2x. For POWER9 (ISA 3.0) the HW architects in their
infinite wisdom made lxvx and stxvx instructions in their own right.

POWER9 aware GCC will use the POWER9 instruction for lxvx and stxvx
causing these selftests to fail on POWER8. Further compounding the
issue, because of the way -mvsx works it will cause the power9
instructions to be used regardless of -mcpu=power8 to GCC or -mpower8 to
AS.

The safest way to address the problem for now is to not use the extended
mnemonic. We don't care how the CPU loads the values from memory since
the tests only performs register comparisons, so using stdvd2x/lxvd2x
does not impact the test.

Signed-off-by: Cyril Bur <cyrilbur@gmail.com>
Acked-by: Balbir Singh<bsingharora@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-03-09 13:58:00 +11:00
..
alignment selftests: remove duplicated all and clean target 2017-01-05 13:41:35 -07:00
benchmarks selftests/powerpc: Fix remaining fallout from recent changes 2017-02-14 08:02:27 -07:00
context_switch selftests: remove duplicated all and clean target 2017-01-05 13:41:35 -07:00
copyloops selftests: enable O and KBUILD_OUTPUT 2017-01-05 13:42:22 -07:00
dscr selftests: enable O and KBUILD_OUTPUT 2017-01-05 13:42:22 -07:00
include selftests/powerpc: Replace stxvx and lxvx with stxvd2x/lxvd2x 2017-03-09 13:58:00 +11:00
lib selftests/powerpc: Add ptrace tests for VSX, VMX registers 2016-11-17 17:11:51 +11:00
math selftests/powerpc: Fix remaining fallout from recent changes 2017-02-14 08:02:27 -07:00
mm selftests: enable O and KBUILD_OUTPUT 2017-01-05 13:42:22 -07:00
pmu linux-kselftest-4.11-rc1 2017-02-25 15:32:53 -08:00
primitives selftests: remove duplicated all and clean target 2017-01-05 13:41:35 -07:00
ptrace selftests/powerpc: Add ptrace tests for TM SPR registers 2016-11-17 17:11:52 +11:00
scripts selftests/powerpc: Add script to test HMI functionality 2015-12-17 10:46:43 +11:00
signal selftests/powerpc: Move shared headers into new include dir 2016-11-17 17:11:47 +11:00
stringloops selftests: remove duplicated all and clean target 2017-01-05 13:41:35 -07:00
switch_endian selftests: enable O and KBUILD_OUTPUT 2017-01-05 13:42:22 -07:00
syscalls selftests: remove duplicated all and clean target 2017-01-05 13:41:35 -07:00
tm selftests/powerpc: Fix remaining fallout from recent changes 2017-02-14 08:02:27 -07:00
vphn selftests: remove duplicated all and clean target 2017-01-05 13:41:35 -07:00
harness.c selftest/powerpc: Fix false failures for skipped tests 2017-03-03 11:24:50 +11:00
Makefile selftests/powerpc: Fix the clean rule since recent changes 2017-02-14 08:02:20 -07:00
utils.c selftests/powerpc: Move pick_online_cpu() up into utils.c 2015-12-17 10:46:41 +11:00