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Diffstat (limited to 'tools/testing/selftests/arm64/abi/hwcap.c')
-rw-r--r--tools/testing/selftests/arm64/abi/hwcap.c319
1 files changed, 269 insertions, 50 deletions
diff --git a/tools/testing/selftests/arm64/abi/hwcap.c b/tools/testing/selftests/arm64/abi/hwcap.c
index d4ad813fed10..e3d262831d91 100644
--- a/tools/testing/selftests/arm64/abi/hwcap.c
+++ b/tools/testing/selftests/arm64/abi/hwcap.c
@@ -19,19 +19,38 @@
#include "../../kselftest.h"
-#define TESTS_PER_HWCAP 2
+#define TESTS_PER_HWCAP 3
/*
- * Function expected to generate SIGILL when the feature is not
- * supported and return when it is supported. If SIGILL is generated
- * then the handler must be able to skip over the instruction safely.
+ * Function expected to generate exception when the feature is not
+ * supported and return when it is supported. If the specific exception
+ * is generated then the handler must be able to skip over the
+ * instruction safely.
*
* Note that it is expected that for many architecture extensions
* there are no specific traps due to no architecture state being
* added so we may not fault if running on a kernel which doesn't know
* to add the hwcap.
*/
-typedef void (*sigill_fn)(void);
+typedef void (*sig_fn)(void);
+
+static void aes_sigill(void)
+{
+ /* AESE V0.16B, V0.16B */
+ asm volatile(".inst 0x4e284800" : : : );
+}
+
+static void atomics_sigill(void)
+{
+ /* STADD W0, [SP] */
+ asm volatile(".inst 0xb82003ff" : : : );
+}
+
+static void crc32_sigill(void)
+{
+ /* CRC32W W0, W0, W1 */
+ asm volatile(".inst 0x1ac14800" : : : );
+}
static void cssc_sigill(void)
{
@@ -39,6 +58,29 @@ static void cssc_sigill(void)
asm volatile(".inst 0xdac01c00" : : : "x0");
}
+static void fp_sigill(void)
+{
+ asm volatile("fmov s0, #1");
+}
+
+static void ilrcpc_sigill(void)
+{
+ /* LDAPUR W0, [SP, #8] */
+ asm volatile(".inst 0x994083e0" : : : );
+}
+
+static void jscvt_sigill(void)
+{
+ /* FJCVTZS W0, D0 */
+ asm volatile(".inst 0x1e7e0000" : : : );
+}
+
+static void lrcpc_sigill(void)
+{
+ /* LDAPR W0, [SP, #0] */
+ asm volatile(".inst 0xb8bfc3e0" : : : );
+}
+
static void mops_sigill(void)
{
char dst[1], src[1];
@@ -53,11 +95,35 @@ static void mops_sigill(void)
: "cc", "memory");
}
+static void pmull_sigill(void)
+{
+ /* PMULL V0.1Q, V0.1D, V0.1D */
+ asm volatile(".inst 0x0ee0e000" : : : );
+}
+
static void rng_sigill(void)
{
asm volatile("mrs x0, S3_3_C2_C4_0" : : : "x0");
}
+static void sha1_sigill(void)
+{
+ /* SHA1H S0, S0 */
+ asm volatile(".inst 0x5e280800" : : : );
+}
+
+static void sha2_sigill(void)
+{
+ /* SHA256H Q0, Q0, V0.4S */
+ asm volatile(".inst 0x5e004000" : : : );
+}
+
+static void sha512_sigill(void)
+{
+ /* SHA512H Q0, Q0, V0.2D */
+ asm volatile(".inst 0xce608000" : : : );
+}
+
static void sme_sigill(void)
{
/* RDSVL x0, #0 */
@@ -208,15 +274,46 @@ static void svebf16_sigill(void)
asm volatile(".inst 0x658aa000" : : : "z0");
}
+static void hbc_sigill(void)
+{
+ /* BC.EQ +4 */
+ asm volatile("cmp xzr, xzr\n"
+ ".inst 0x54000030" : : : "cc");
+}
+
+static void uscat_sigbus(void)
+{
+ /* unaligned atomic access */
+ asm volatile("ADD x1, sp, #2" : : : );
+ /* STADD W0, [X1] */
+ asm volatile(".inst 0xb820003f" : : : );
+}
+
static const struct hwcap_data {
const char *name;
unsigned long at_hwcap;
unsigned long hwcap_bit;
const char *cpuinfo;
- sigill_fn sigill_fn;
+ sig_fn sigill_fn;
bool sigill_reliable;
+ sig_fn sigbus_fn;
+ bool sigbus_reliable;
} hwcaps[] = {
{
+ .name = "AES",
+ .at_hwcap = AT_HWCAP,
+ .hwcap_bit = HWCAP_AES,
+ .cpuinfo = "aes",
+ .sigill_fn = aes_sigill,
+ },
+ {
+ .name = "CRC32",
+ .at_hwcap = AT_HWCAP,
+ .hwcap_bit = HWCAP_CRC32,
+ .cpuinfo = "crc32",
+ .sigill_fn = crc32_sigill,
+ },
+ {
.name = "CSSC",
.at_hwcap = AT_HWCAP2,
.hwcap_bit = HWCAP2_CSSC,
@@ -224,6 +321,50 @@ static const struct hwcap_data {
.sigill_fn = cssc_sigill,
},
{
+ .name = "FP",
+ .at_hwcap = AT_HWCAP,
+ .hwcap_bit = HWCAP_FP,
+ .cpuinfo = "fp",
+ .sigill_fn = fp_sigill,
+ },
+ {
+ .name = "JSCVT",
+ .at_hwcap = AT_HWCAP,
+ .hwcap_bit = HWCAP_JSCVT,
+ .cpuinfo = "jscvt",
+ .sigill_fn = jscvt_sigill,
+ },
+ {
+ .name = "LRCPC",
+ .at_hwcap = AT_HWCAP,
+ .hwcap_bit = HWCAP_LRCPC,
+ .cpuinfo = "lrcpc",
+ .sigill_fn = lrcpc_sigill,
+ },
+ {
+ .name = "LRCPC2",
+ .at_hwcap = AT_HWCAP,
+ .hwcap_bit = HWCAP_ILRCPC,
+ .cpuinfo = "ilrcpc",
+ .sigill_fn = ilrcpc_sigill,
+ },
+ {
+ .name = "LSE",
+ .at_hwcap = AT_HWCAP,
+ .hwcap_bit = HWCAP_ATOMICS,
+ .cpuinfo = "atomics",
+ .sigill_fn = atomics_sigill,
+ },
+ {
+ .name = "LSE2",
+ .at_hwcap = AT_HWCAP,
+ .hwcap_bit = HWCAP_USCAT,
+ .cpuinfo = "uscat",
+ .sigill_fn = atomics_sigill,
+ .sigbus_fn = uscat_sigbus,
+ .sigbus_reliable = true,
+ },
+ {
.name = "MOPS",
.at_hwcap = AT_HWCAP2,
.hwcap_bit = HWCAP2_MOPS,
@@ -232,6 +373,13 @@ static const struct hwcap_data {
.sigill_reliable = true,
},
{
+ .name = "PMULL",
+ .at_hwcap = AT_HWCAP,
+ .hwcap_bit = HWCAP_PMULL,
+ .cpuinfo = "pmull",
+ .sigill_fn = pmull_sigill,
+ },
+ {
.name = "RNG",
.at_hwcap = AT_HWCAP2,
.hwcap_bit = HWCAP2_RNG,
@@ -245,6 +393,27 @@ static const struct hwcap_data {
.cpuinfo = "rprfm",
},
{
+ .name = "SHA1",
+ .at_hwcap = AT_HWCAP,
+ .hwcap_bit = HWCAP_SHA1,
+ .cpuinfo = "sha1",
+ .sigill_fn = sha1_sigill,
+ },
+ {
+ .name = "SHA2",
+ .at_hwcap = AT_HWCAP,
+ .hwcap_bit = HWCAP_SHA2,
+ .cpuinfo = "sha2",
+ .sigill_fn = sha2_sigill,
+ },
+ {
+ .name = "SHA512",
+ .at_hwcap = AT_HWCAP,
+ .hwcap_bit = HWCAP_SHA512,
+ .cpuinfo = "sha512",
+ .sigill_fn = sha512_sigill,
+ },
+ {
.name = "SME",
.at_hwcap = AT_HWCAP2,
.hwcap_bit = HWCAP2_SME,
@@ -386,20 +555,32 @@ static const struct hwcap_data {
.hwcap_bit = HWCAP2_SVE_EBF16,
.cpuinfo = "sveebf16",
},
+ {
+ .name = "HBC",
+ .at_hwcap = AT_HWCAP2,
+ .hwcap_bit = HWCAP2_HBC,
+ .cpuinfo = "hbc",
+ .sigill_fn = hbc_sigill,
+ .sigill_reliable = true,
+ },
};
-static bool seen_sigill;
-
-static void handle_sigill(int sig, siginfo_t *info, void *context)
-{
- ucontext_t *uc = context;
-
- seen_sigill = true;
-
- /* Skip over the offending instruction */
- uc->uc_mcontext.pc += 4;
+typedef void (*sighandler_fn)(int, siginfo_t *, void *);
+
+#define DEF_SIGHANDLER_FUNC(SIG, NUM) \
+static bool seen_##SIG; \
+static void handle_##SIG(int sig, siginfo_t *info, void *context) \
+{ \
+ ucontext_t *uc = context; \
+ \
+ seen_##SIG = true; \
+ /* Skip over the offending instruction */ \
+ uc->uc_mcontext.pc += 4; \
}
+DEF_SIGHANDLER_FUNC(sigill, SIGILL);
+DEF_SIGHANDLER_FUNC(sigbus, SIGBUS);
+
bool cpuinfo_present(const char *name)
{
FILE *f;
@@ -442,24 +623,77 @@ bool cpuinfo_present(const char *name)
return false;
}
-int main(void)
+static int install_sigaction(int signum, sighandler_fn handler)
{
- const struct hwcap_data *hwcap;
- int i, ret;
- bool have_cpuinfo, have_hwcap;
+ int ret;
struct sigaction sa;
- ksft_print_header();
- ksft_set_plan(ARRAY_SIZE(hwcaps) * TESTS_PER_HWCAP);
-
memset(&sa, 0, sizeof(sa));
- sa.sa_sigaction = handle_sigill;
+ sa.sa_sigaction = handler;
sa.sa_flags = SA_RESTART | SA_SIGINFO;
sigemptyset(&sa.sa_mask);
- ret = sigaction(SIGILL, &sa, NULL);
+ ret = sigaction(signum, &sa, NULL);
if (ret < 0)
- ksft_exit_fail_msg("Failed to install SIGILL handler: %s (%d)\n",
+ ksft_exit_fail_msg("Failed to install SIGNAL handler: %s (%d)\n",
+ strerror(errno), errno);
+
+ return ret;
+}
+
+static void uninstall_sigaction(int signum)
+{
+ if (sigaction(signum, NULL, NULL) < 0)
+ ksft_exit_fail_msg("Failed to uninstall SIGNAL handler: %s (%d)\n",
strerror(errno), errno);
+}
+
+#define DEF_INST_RAISE_SIG(SIG, NUM) \
+static bool inst_raise_##SIG(const struct hwcap_data *hwcap, \
+ bool have_hwcap) \
+{ \
+ if (!hwcap->SIG##_fn) { \
+ ksft_test_result_skip(#SIG"_%s\n", hwcap->name); \
+ /* assume that it would raise exception in default */ \
+ return true; \
+ } \
+ \
+ install_sigaction(NUM, handle_##SIG); \
+ \
+ seen_##SIG = false; \
+ hwcap->SIG##_fn(); \
+ \
+ if (have_hwcap) { \
+ /* Should be able to use the extension */ \
+ ksft_test_result(!seen_##SIG, \
+ #SIG"_%s\n", hwcap->name); \
+ } else if (hwcap->SIG##_reliable) { \
+ /* Guaranteed a SIGNAL */ \
+ ksft_test_result(seen_##SIG, \
+ #SIG"_%s\n", hwcap->name); \
+ } else { \
+ /* Missing SIGNAL might be fine */ \
+ ksft_print_msg(#SIG"_%sreported for %s\n", \
+ seen_##SIG ? "" : "not ", \
+ hwcap->name); \
+ ksft_test_result_skip(#SIG"_%s\n", \
+ hwcap->name); \
+ } \
+ \
+ uninstall_sigaction(NUM); \
+ return seen_##SIG; \
+}
+
+DEF_INST_RAISE_SIG(sigill, SIGILL);
+DEF_INST_RAISE_SIG(sigbus, SIGBUS);
+
+int main(void)
+{
+ int i;
+ const struct hwcap_data *hwcap;
+ bool have_cpuinfo, have_hwcap, raise_sigill;
+
+ ksft_print_header();
+ ksft_set_plan(ARRAY_SIZE(hwcaps) * TESTS_PER_HWCAP);
for (i = 0; i < ARRAY_SIZE(hwcaps); i++) {
hwcap = &hwcaps[i];
@@ -473,30 +707,15 @@ int main(void)
ksft_test_result(have_hwcap == have_cpuinfo,
"cpuinfo_match_%s\n", hwcap->name);
- if (hwcap->sigill_fn) {
- seen_sigill = false;
- hwcap->sigill_fn();
-
- if (have_hwcap) {
- /* Should be able to use the extension */
- ksft_test_result(!seen_sigill, "sigill_%s\n",
- hwcap->name);
- } else if (hwcap->sigill_reliable) {
- /* Guaranteed a SIGILL */
- ksft_test_result(seen_sigill, "sigill_%s\n",
- hwcap->name);
- } else {
- /* Missing SIGILL might be fine */
- ksft_print_msg("SIGILL %sreported for %s\n",
- seen_sigill ? "" : "not ",
- hwcap->name);
- ksft_test_result_skip("sigill_%s\n",
- hwcap->name);
- }
- } else {
- ksft_test_result_skip("sigill_%s\n",
- hwcap->name);
- }
+ /*
+ * Testing for SIGBUS only makes sense after make sure
+ * that the instruction does not cause a SIGILL signal.
+ */
+ raise_sigill = inst_raise_sigill(hwcap, have_hwcap);
+ if (!raise_sigill)
+ inst_raise_sigbus(hwcap, have_hwcap);
+ else
+ ksft_test_result_skip("sigbus_%s\n", hwcap->name);
}
ksft_print_cnts();
generated by cgit (git 2.34.1) at 2024-06-24 07:16:32 +0000