diff mbox series

[v5,2/4] kselftest/arm64: Validate vector lengths are set in sve-probe-vls

Message ID 20210803140450.46624-3-broonie@kernel.org
State New
Headers show
Series kselftest/arm64: Vector length configuration tests | expand

Commit Message

Mark Brown Aug. 3, 2021, 2:04 p.m. UTC 
Currently sve-probe-vls does not verify that the vector lengths reported
by the prctl() interface are actually what is reported by the architecture,
use the rdvl_sve() helper to validate this.

Signed-off-by: Mark Brown <broonie@kernel.org>

Reviewed-by: Dave Martin <Dave.Martin@arm.com>

---
 tools/testing/selftests/arm64/fp/Makefile        | 2 +-
 tools/testing/selftests/arm64/fp/sve-probe-vls.c | 5 +++++
 2 files changed, 6 insertions(+), 1 deletion(-)

-- 
2.20.1
diff mbox series

Patch

diff --git a/tools/testing/selftests/arm64/fp/Makefile b/tools/testing/selftests/arm64/fp/Makefile
index ed62e7003b96..fa3a0167db2d 100644
--- a/tools/testing/selftests/arm64/fp/Makefile
+++ b/tools/testing/selftests/arm64/fp/Makefile
@@ -13,7 +13,7 @@  fpsimd-test: fpsimd-test.o
 	$(CC) -nostdlib $^ -o $@
 rdvl-sve: rdvl-sve.o rdvl.o
 sve-ptrace: sve-ptrace.o sve-ptrace-asm.o
-sve-probe-vls: sve-probe-vls.o
+sve-probe-vls: sve-probe-vls.o rdvl.o
 sve-test: sve-test.o
 	$(CC) -nostdlib $^ -o $@
 vlset: vlset.o
diff --git a/tools/testing/selftests/arm64/fp/sve-probe-vls.c b/tools/testing/selftests/arm64/fp/sve-probe-vls.c
index 76e138525d55..a24eca7a4ecb 100644
--- a/tools/testing/selftests/arm64/fp/sve-probe-vls.c
+++ b/tools/testing/selftests/arm64/fp/sve-probe-vls.c
@@ -13,6 +13,7 @@ 
 #include <asm/sigcontext.h>
 
 #include "../../kselftest.h"
+#include "rdvl.h"
 
 int main(int argc, char **argv)
 {
@@ -38,6 +39,10 @@  int main(int argc, char **argv)
 
 		vl &= PR_SVE_VL_LEN_MASK;
 
+		if (rdvl_sve() != vl)
+			ksft_exit_fail_msg("PR_SVE_SET_VL reports %d, RDVL %d\n",
+					   vl, rdvl_sve());
+
 		if (!sve_vl_valid(vl))
 			ksft_exit_fail_msg("VL %d invalid\n", vl);
 		vq = sve_vq_from_vl(vl);