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| author | Mark Rutland <mark.rutland@arm.com> | 2025-05-08 16:26:43 +0300 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2025-05-08 17:45:24 +0300 |
| commit | 031a2acaa1cdab3c89dfb810a8cb75ddfdf5a65c (patch) | |
| tree | 556892e436d7044735c2511d637b9c03fa3e1383 | |
| parent | be45e63f79ecfea8373f18f50330838d77553a6b (diff) | |
| download | linux-031a2acaa1cdab3c89dfb810a8cb75ddfdf5a65c.tar.xz | |
kselftest/arm64: fp-ptrace: Adjust to new VL change behaviour
In order to fix an ABI problem, we recently changed the way that
changing the SVE/SME vector length affects PSTATE.SM. Historically,
changing the SME vector length would clear PSTATE.SM. Now, changing the
SME vector length preserves PSTATE.SM.
Update the fp-ptrace test for the new behaviour.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: David Spickett <david.spickett@arm.com>
Cc: Luis Machado <luis.machado@arm.com>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Mark Brown <broonie@kernel.org>
Cc: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20250508132644.1395904-24-mark.rutland@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
| -rw-r--r-- | tools/testing/selftests/arm64/fp/fp-ptrace.c | 18 |
1 files changed, 3 insertions, 15 deletions
diff --git a/tools/testing/selftests/arm64/fp/fp-ptrace.c b/tools/testing/selftests/arm64/fp/fp-ptrace.c index 762048eb354f..c2882a5a5cc0 100644 --- a/tools/testing/selftests/arm64/fp/fp-ptrace.c +++ b/tools/testing/selftests/arm64/fp/fp-ptrace.c @@ -1183,18 +1183,8 @@ static void sve_write(pid_t child, struct test_config *config) static bool za_write_supported(struct test_config *config) { - if (config->sme_vl_in != config->sme_vl_expected) { - /* Changing the SME VL exits streaming mode. */ - if (config->svcr_expected & SVCR_SM) { - return false; - } - } else { - /* Otherwise we can't change streaming mode */ - if ((config->svcr_in & SVCR_SM) != - (config->svcr_expected & SVCR_SM)) { - return false; - } - } + if ((config->svcr_in & SVCR_SM) != (config->svcr_expected & SVCR_SM)) + return false; return true; } @@ -1212,10 +1202,8 @@ static void za_write_expected(struct test_config *config) memset(zt_expected, 0, sizeof(zt_expected)); } - /* Changing the SME VL flushes ZT, SVE state and exits SM */ + /* Changing the SME VL flushes ZT, SVE state */ if (config->sme_vl_in != config->sme_vl_expected) { - svcr_expected &= ~SVCR_SM; - sve_vq = __sve_vq_from_vl(vl_expected(config)); memset(z_expected, 0, __SVE_ZREGS_SIZE(sve_vq)); memset(p_expected, 0, __SVE_PREGS_SIZE(sve_vq)); |