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authorMark Brown <broonie@kernel.org>2021-08-19 14:42:42 +0100
committerCatalin Marinas <catalin.marinas@arm.com>2021-08-23 11:11:05 +0100
commitc1f67a19c12eefeb67e6dc98dd09253623a213d1 (patch)
tree5bc0623f6614d474a994e4cc1ff321422cbba1f5 /tools/testing/selftests/arm64/signal
parentkselftest/arm64: signal: Support signal frames with SVE register data (diff)
downloadlinux-dev-c1f67a19c12eefeb67e6dc98dd09253623a213d1.tar.xz
linux-dev-c1f67a19c12eefeb67e6dc98dd09253623a213d1.zip
kselftest/arm64: signal: Check SVE signal frame shows expected vector length
As a basic check that the SVE signal frame is being set up correctly verify that the vector length in the signal frame is the vector length that the process has. Signed-off-by: Mark Brown <broonie@kernel.org> Link: https://lore.kernel.org/r/20210819134245.13935-4-broonie@kernel.org Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'tools/testing/selftests/arm64/signal')
-rw-r--r--tools/testing/selftests/arm64/signal/.gitignore1
-rw-r--r--tools/testing/selftests/arm64/signal/testcases/sve_vl.c68
2 files changed, 69 insertions, 0 deletions
diff --git a/tools/testing/selftests/arm64/signal/.gitignore b/tools/testing/selftests/arm64/signal/.gitignore
index 78c902045ca7..c1742755abb9 100644
--- a/tools/testing/selftests/arm64/signal/.gitignore
+++ b/tools/testing/selftests/arm64/signal/.gitignore
@@ -1,4 +1,5 @@
# SPDX-License-Identifier: GPL-2.0-only
mangle_*
fake_sigreturn_*
+sve_*
!*.[ch]
diff --git a/tools/testing/selftests/arm64/signal/testcases/sve_vl.c b/tools/testing/selftests/arm64/signal/testcases/sve_vl.c
new file mode 100644
index 000000000000..92904653add1
--- /dev/null
+++ b/tools/testing/selftests/arm64/signal/testcases/sve_vl.c
@@ -0,0 +1,68 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2021 ARM Limited
+ *
+ * Check that the SVE vector length reported in signal contexts is the
+ * expected one.
+ */
+
+#include <signal.h>
+#include <ucontext.h>
+#include <sys/prctl.h>
+
+#include "test_signals_utils.h"
+#include "testcases.h"
+
+struct fake_sigframe sf;
+unsigned int vl;
+
+static bool get_sve_vl(struct tdescr *td)
+{
+ int ret = prctl(PR_SVE_GET_VL);
+ if (ret == -1)
+ return false;
+
+ vl = ret;
+
+ return true;
+}
+
+static int sve_vl(struct tdescr *td, siginfo_t *si, ucontext_t *uc)
+{
+ size_t resv_sz, offset;
+ struct _aarch64_ctx *head = GET_SF_RESV_HEAD(sf);
+ struct sve_context *sve;
+
+ /* Get a signal context which should have a SVE frame in it */
+ if (!get_current_context(td, &sf.uc))
+ return 1;
+
+ resv_sz = GET_SF_RESV_SIZE(sf);
+ head = get_header(head, SVE_MAGIC, resv_sz, &offset);
+ if (!head) {
+ fprintf(stderr, "No SVE context\n");
+ return 1;
+ }
+ sve = (struct sve_context *)head;
+
+ if (sve->vl != vl) {
+ fprintf(stderr, "sigframe VL %u, expected %u\n",
+ sve->vl, vl);
+ return 1;
+ } else {
+ fprintf(stderr, "got expected VL %u\n", vl);
+ }
+
+ td->pass = 1;
+
+ return 0;
+}
+
+struct tdescr tde = {
+ .name = "SVE VL",
+ .descr = "Check that we get the right SVE VL reported",
+ .feats_required = FEAT_SVE,
+ .timeout = 3,
+ .init = get_sve_vl,
+ .run = sve_vl,
+};