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kselftest/arm64: fp-ptrace: Adjust to new inactive mode behaviour

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In order to fix an ABI problem, we recently changed the way that reads
of the NT_ARM_SVE and NT_ARM_SSVE regsets behave when their
corresponding vector state is inactive.

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/20250508132644.1395904-25-mark.rutland@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Mark Rutland 2025-05-08 14:26:44 +01:00 committed by Will Deacon
parent 031a2acaa1
commit 864f3ddcd7
1 changed files with 22 additions and 8 deletions
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30
tools/testing/selftests/arm64/fp/fp-ptrace.c
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@ -439,10 +439,17 @@ static bool check_ptrace_values_sve(pid_t child, struct test_config *config)
pass = false;
}
if (sve->size != SVE_PT_SIZE(vq, sve->flags)) {
ksft_print_msg("Mismatch in SVE header size: %d != %lu\n",
sve->size, SVE_PT_SIZE(vq, sve->flags));
pass = false;
if (svcr_in & SVCR_SM) {
if (sve->size != sizeof(sve)) {
ksft_print_msg("NT_ARM_SVE reports data with PSTATE.SM\n");
pass = false;
}
} else {
if (sve->size != SVE_PT_SIZE(vq, sve->flags)) {
ksft_print_msg("Mismatch in SVE header size: %d != %lu\n",
sve->size, SVE_PT_SIZE(vq, sve->flags));
pass = false;
}
}
/* The registers might be in completely different formats! */
@ -515,10 +522,17 @@ static bool check_ptrace_values_ssve(pid_t child, struct test_config *config)
pass = false;
}
if (sve->size != SVE_PT_SIZE(vq, sve->flags)) {
ksft_print_msg("Mismatch in SSVE header size: %d != %lu\n",
sve->size, SVE_PT_SIZE(vq, sve->flags));
pass = false;
if (!(svcr_in & SVCR_SM)) {
if (sve->size != sizeof(sve)) {
ksft_print_msg("NT_ARM_SSVE reports data without PSTATE.SM\n");
pass = false;
}
} else {
if (sve->size != SVE_PT_SIZE(vq, sve->flags)) {
ksft_print_msg("Mismatch in SSVE header size: %d != %lu\n",
sve->size, SVE_PT_SIZE(vq, sve->flags));
pass = false;
}
}
/* The registers might be in completely different formats! */