[PATCH v1 2/6] kselftest/arm64: Add FEAT_CSSC to the hwcap selftest
Mark Brown
broonie at kernel.org
Mon Oct 17 08:25:16 PDT 2022
Add FEAT_CSSC to the set of features checked by the hwcap selftest.
Signed-off-by: Mark Brown <broonie at kernel.org>
---
tools/testing/selftests/arm64/abi/hwcap.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/tools/testing/selftests/arm64/abi/hwcap.c b/tools/testing/selftests/arm64/abi/hwcap.c
index 9f1a7b5c6193..c7a6b327a7d0 100644
--- a/tools/testing/selftests/arm64/abi/hwcap.c
+++ b/tools/testing/selftests/arm64/abi/hwcap.c
@@ -33,6 +33,12 @@
*/
typedef void (*sigill_fn)(void);
+static void cssc_sigill(void)
+{
+ /* CNT x0, x0 */
+ asm volatile(".inst 0xdac01c00" : : : "x0");
+}
+
static void rng_sigill(void)
{
asm volatile("mrs x0, S3_3_C2_C4_0" : : : "x0");
@@ -118,6 +124,13 @@ static const struct hwcap_data {
sigill_fn sigill_fn;
bool sigill_reliable;
} hwcaps[] = {
+ {
+ .name = "CSSC",
+ .at_hwcap = AT_HWCAP2,
+ .hwcap_bit = HWCAP2_CSSC,
+ .cpuinfo = "cssc",
+ .sigill_fn = cssc_sigill,
+ },
{
.name = "RNG",
.at_hwcap = AT_HWCAP2,
--
2.30.2
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