[PATCH v3 1/4] eal: expand the availability of WFE and related instructions

[Wathsala Vithanage]

The availability of __RTE_ARM_WFE, __RTE_ARM_SEV, __RTE_ARM_SEVL,
and  __RTE_ARM_LOAD_EXC_* macros for other applications, such as
PMD power management, should not depend on the choice of use of
these instructions in rte_wait_until_equal_N functions.
Therefore, this patch moves these macros out of control of the
RTE_WAIT_UNTIL_EQUAL_ARCH_DEFINED macro.

Signed-off-by: Wathsala Vithanage <wathsala.vithan...@arm.com>
Reviewed-by: Dhruv Tripathi <dhruv.tripa...@arm.com>

---
 lib/eal/arm/include/rte_pause_64.h | 4 ++--
 lib/eal/arm/rte_cpuflags.c         | 4 ++--
 lib/eal/arm/rte_power_intrinsics.c | 9 ++++-----
 3 files changed, 8 insertions(+), 9 deletions(-)

diff --git a/lib/eal/arm/include/rte_pause_64.h 
b/lib/eal/arm/include/rte_pause_64.h
index 9e2dbf3531..8224f09ba7 100644
--- a/lib/eal/arm/include/rte_pause_64.h
+++ b/lib/eal/arm/include/rte_pause_64.h
@@ -24,8 +24,6 @@ static inline void rte_pause(void)
        asm volatile("yield" ::: "memory");
 }
 
-#ifdef RTE_WAIT_UNTIL_EQUAL_ARCH_DEFINED
-
 /* Send a local event to quit WFE. */
 #define __RTE_ARM_SEVL() { asm volatile("sevl" : : : "memory"); }
 
@@ -148,6 +146,8 @@ static inline void rte_pause(void)
                __RTE_ARM_LOAD_EXC_128(src, dst, memorder) \
 }
 
+#ifdef RTE_WAIT_UNTIL_EQUAL_ARCH_DEFINED
+
 static __rte_always_inline void
 rte_wait_until_equal_16(volatile uint16_t *addr, uint16_t expected,
                rte_memory_order memorder)
diff --git a/lib/eal/arm/rte_cpuflags.c b/lib/eal/arm/rte_cpuflags.c
index 7ba4f8ba97..29884c285f 100644
--- a/lib/eal/arm/rte_cpuflags.c
+++ b/lib/eal/arm/rte_cpuflags.c
@@ -163,7 +163,7 @@ void
 rte_cpu_get_intrinsics_support(struct rte_cpu_intrinsics *intrinsics)
 {
        memset(intrinsics, 0, sizeof(*intrinsics));
-#ifdef RTE_ARM_USE_WFE
+#ifdef RTE_ARCH_64
        intrinsics->power_monitor = 1;
-#endif
+#endif /* RTE_ARCH_64 */
 }
diff --git a/lib/eal/arm/rte_power_intrinsics.c 
b/lib/eal/arm/rte_power_intrinsics.c
index f54cf59e80..b0056cce8b 100644
--- a/lib/eal/arm/rte_power_intrinsics.c
+++ b/lib/eal/arm/rte_power_intrinsics.c
@@ -17,7 +17,7 @@ rte_power_monitor(const struct rte_power_monitor_cond *pmc,
 {
        RTE_SET_USED(tsc_timestamp);
 
-#ifdef RTE_ARM_USE_WFE
+#ifdef RTE_ARCH_64
        const unsigned int lcore_id = rte_lcore_id();
        uint64_t cur_value;
 
@@ -57,7 +57,7 @@ rte_power_monitor(const struct rte_power_monitor_cond *pmc,
        RTE_SET_USED(pmc);
 
        return -ENOTSUP;
-#endif
+#endif /* RTE_ARCH_64 */
 }
 
 /**
@@ -81,13 +81,12 @@ rte_power_monitor_wakeup(const unsigned int lcore_id)
 {
        RTE_SET_USED(lcore_id);
 
-#ifdef RTE_ARM_USE_WFE
+#ifdef RTE_ARCH_64
        __RTE_ARM_SEV()
-
        return 0;
 #else
        return -ENOTSUP;
-#endif
+#endif /* RTE_ARCH_64 */
 }
 
 int
-- 
2.34.1