[PATCH v8 5/9] kselftest/arm64/mte: check MTE_FAR feature is supported
From: Yeoreum Yun <hidden>
Date: 2025-06-11 18:07:53
Also in:
linux-doc, lkml
Subsystem:
arm64 port (aarch64 architecture), kernel selftest framework, the rest · Maintainers:
Catalin Marinas, Will Deacon, Shuah Khan, Linus Torvalds
To run the MTE_FAR test when cpu supports MTE_FAR feature, check the MTE_FAR feature is supported in mte test. Signed-off-by: Yeoreum Yun <redacted> Reviewed-by: Mark Brown <broonie@kernel.org> --- tools/testing/selftests/arm64/mte/mte_common_util.c | 4 ++++ tools/testing/selftests/arm64/mte/mte_common_util.h | 1 + 2 files changed, 5 insertions(+)
diff --git a/tools/testing/selftests/arm64/mte/mte_common_util.c b/tools/testing/selftests/arm64/mte/mte_common_util.c
index 83240b980f9c..5c5680a87498 100644
--- a/tools/testing/selftests/arm64/mte/mte_common_util.c
+++ b/tools/testing/selftests/arm64/mte/mte_common_util.c@@ -26,6 +26,7 @@ #define INIT_BUFFER_SIZE 256 struct mte_fault_cxt cur_mte_cxt; +bool mtefar_support; static unsigned int mte_cur_mode; static unsigned int mte_cur_pstate_tco;
@@ -325,12 +326,15 @@ int mte_switch_mode(int mte_option, unsigned long incl_mask) int mte_default_setup(void) { unsigned long hwcaps2 = getauxval(AT_HWCAP2); + unsigned long hwcaps3 = getauxval(AT_HWCAP3); unsigned long en = 0; int ret; if (!(hwcaps2 & HWCAP2_MTE)) ksft_exit_skip("MTE features unavailable\n"); + mtefar_support = !!(hwcaps3 & HWCAP3_MTE_FAR); + /* Get current mte mode */ ret = prctl(PR_GET_TAGGED_ADDR_CTRL, en, 0, 0, 0); if (ret < 0) {
diff --git a/tools/testing/selftests/arm64/mte/mte_common_util.h b/tools/testing/selftests/arm64/mte/mte_common_util.h
index 6b109e84fa39..4e1dd959df9b 100644
--- a/tools/testing/selftests/arm64/mte/mte_common_util.h
+++ b/tools/testing/selftests/arm64/mte/mte_common_util.h@@ -37,6 +37,7 @@ struct mte_fault_cxt { }; extern struct mte_fault_cxt cur_mte_cxt; +extern bool mtefar_support; /* MTE utility functions */ void mte_default_handler(int signum, siginfo_t *si, void *uc);
--
LEVI:{C3F47F37-75D8-414A-A8BA-3980EC8A46D7}