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kselftest/arm64: signal: Allow tests to be incompatible with features 

Some features may invalidate some tests, for example by supporting an
operation which would trap otherwise. Allow tests to list features that
they are incompatible with so we can cover the case where a signal will
be generated without disruption on systems where that won't happen.

Signed-off-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Shuah Khan <skhan@linuxfoundation.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Link: https://lore.kernel.org/r/20220207152109.197566-6-broonie@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Mark Brown 2022-02-07 15:20:34 +00:00 committed by Will Deacon
parent 0a775ccb81
commit 32de73e890
3 changed files with 28 additions and 9 deletions
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1
tools/testing/selftests/arm64/signal/test_signals.h
View File

@ -53,6 +53,7 @@ struct tdescr {
char *name;
char *descr;
unsigned long feats_required;
unsigned long feats_incompatible;
/* bitmask of effectively supported feats: populated at run-time */
unsigned long feats_supported;
bool initialized;

34
tools/testing/selftests/arm64/signal/test_signals_utils.c
View File

@ -36,6 +36,8 @@ static inline char *feats_to_string(unsigned long feats)
{
size_t flen = MAX_FEATS_SZ - 1;
feats_string[0] = '\0';
for (int i = 0; i < FMAX_END; i++) {
if (feats & (1UL << i)) {
size_t tlen = strlen(feats_names[i]);
@ -256,7 +258,7 @@ int test_init(struct tdescr *td)
td->minsigstksz = MINSIGSTKSZ;
fprintf(stderr, "Detected MINSTKSIGSZ:%d\n", td->minsigstksz);
if (td->feats_required) {
if (td->feats_required || td->feats_incompatible) {
td->feats_supported = 0;
/*
* Checking for CPU required features using both the
@ -267,15 +269,29 @@ int test_init(struct tdescr *td)
if (getauxval(AT_HWCAP) & HWCAP_SVE)
td->feats_supported |= FEAT_SVE;
if (feats_ok(td)) {
fprintf(stderr,
"Required Features: [%s] supported\n",
feats_to_string(td->feats_required &
td->feats_supported));
if (td->feats_required & td->feats_supported)
fprintf(stderr,
"Required Features: [%s] supported\n",
feats_to_string(td->feats_required &
td->feats_supported));
if (!(td->feats_incompatible & td->feats_supported))
fprintf(stderr,
"Incompatible Features: [%s] absent\n",
feats_to_string(td->feats_incompatible));
} else {
fprintf(stderr,
"Required Features: [%s] NOT supported\n",
feats_to_string(td->feats_required &
~td->feats_supported));
if ((td->feats_required & td->feats_supported) !=
td->feats_supported)
fprintf(stderr,
"Required Features: [%s] NOT supported\n",
feats_to_string(td->feats_required &
~td->feats_supported));
if (td->feats_incompatible & td->feats_supported)
fprintf(stderr,
"Incompatible Features: [%s] supported\n",
feats_to_string(td->feats_incompatible &
~td->feats_supported));
td->result = KSFT_SKIP;
return 0;
}

2
tools/testing/selftests/arm64/signal/test_signals_utils.h
View File

@ -18,6 +18,8 @@ void test_result(struct tdescr *td);
static inline bool feats_ok(struct tdescr *td)
{
if (td->feats_incompatible & td->feats_supported)
return false;
return (td->feats_required & td->feats_supported) == td->feats_required;
}