[PATCH v2 4/5] kselftest/arm64: Move/add POE helpers to test_signals_utils.h

[Kevin Brodsky <kevin.brodsky@arm.com>]

In preparation to adding further POE signal tests, move
get_por_el0() to test_signals_utils.h and add set_por_el0().

Reviewed-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Kevin Brodsky <kevin.brodsky@arm.com>
---
 .../testing/selftests/arm64/signal/test_signals_utils.h  | 16 ++++++++++++++++
 .../selftests/arm64/signal/testcases/poe_siginfo.c       | 15 ---------------
 2 files changed, 16 insertions(+), 15 deletions(-)

diff --git a/tools/testing/selftests/arm64/signal/test_signals_utils.h b/tools/testing/selftests/arm64/signal/test_signals_utils.h
index 36fc12b3cd60..2c7b8c64a35a 100644
--- a/tools/testing/selftests/arm64/signal/test_signals_utils.h
+++ b/tools/testing/selftests/arm64/signal/test_signals_utils.h
@@ -57,6 +57,22 @@ static inline __attribute__((always_inline)) uint64_t get_gcspr_el0(void)
 	return val;
 }
 
+#define SYS_POR_EL0 "S3_3_C10_C2_4"
+
+static inline uint64_t get_por_el0(void)
+{
+	uint64_t val;
+
+	asm volatile("mrs %0, " SYS_POR_EL0 "\n" : "=r"(val));
+
+	return val;
+}
+
+static inline void set_por_el0(uint64_t val)
+{
+	asm volatile("msr " SYS_POR_EL0 ", %0\n" :: "r"(val));
+}
+
 static inline bool feats_ok(struct tdescr *td)
 {
 	if (td->feats_incompatible & td->feats_supported)
diff --git a/tools/testing/selftests/arm64/signal/testcases/poe_siginfo.c b/tools/testing/selftests/arm64/signal/testcases/poe_siginfo.c
index 36bd9940ee05..e15fedf4da6e 100644
--- a/tools/testing/selftests/arm64/signal/testcases/poe_siginfo.c
+++ b/tools/testing/selftests/arm64/signal/testcases/poe_siginfo.c
@@ -21,21 +21,6 @@ static union {
 	char buf[1024 * 128];
 } context;
 
-#define SYS_POR_EL0 "S3_3_C10_C2_4"
-
-static uint64_t get_por_el0(void)
-{
-	uint64_t val;
-
-	asm volatile(
-		"mrs	%0, " SYS_POR_EL0 "\n"
-		: "=r"(val)
-		:
-		: );
-
-	return val;
-}
-
 int poe_present(struct tdescr *td, siginfo_t *si, ucontext_t *uc)
 {
 	struct _aarch64_ctx *head = GET_BUF_RESV_HEAD(context);

-- 
2.51.2