From: Mark Brown <broonie@kernel.org>
Date: Mon, 17 Oct 2022 15:25:16 +0000 (+0100)
Subject: kselftest/arm64: Add FEAT_CSSC to the hwcap selftest
X-Git-Tag: 6.2-rc-smb3-client-fixes-part2~154^2~17^2~4
X-Git-Url: http://git.samba.org/samba.git/?a=commitdiff_plain;h=b0ab73a5479fdf6b42babaccf22b4fa88f5a20a6;p=sfrench%2Fcifs-2.6.git

kselftest/arm64: Add FEAT_CSSC to the hwcap selftest

Add FEAT_CSSC to the set of features checked by the hwcap selftest.

Signed-off-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Link: https://lore.kernel.org/r/20221017152520.1039165-3-broonie@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
---

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,