On Wed, Jul 28, 2021 at 05:33:16PM +0100, Mark Brown wrote:
> 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@xxxxxxxxxx>
Reviewed-by: Dave Martin <Dave.Martin@xxxxxxx>
> ---
> tools/testing/selftests/arm64/fp/Makefile | 2 +-
> tools/testing/selftests/arm64/fp/sve-probe-vls.c | 5 +++++
> 2 files changed, 6 insertions(+), 1 deletion(-)
>
> 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);
> --
> 2.20.1
>
>
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
