[dpdk-dev] [PATCH v4 3/3] build: add option to enable wait until equal

[Ruifeng Wang <ruifeng.wang@arm.com>]

Introduce a meson option 'use_wfe' to select wait until equal method.
The default is disable. Traditional polling loop is used.
When enabled, architecture specific mechanism is relied on to do the
wait.

Signed-off-by: Ruifeng Wang <ruifeng.wang@arm.com>
---
 config/arm/meson.build | 2 +-
 meson_options.txt      | 2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/config/arm/meson.build b/config/arm/meson.build
index 9b147c0b93..9ea478fb77 100644
--- a/config/arm/meson.build
+++ b/config/arm/meson.build
@@ -18,7 +18,6 @@ flags_common = [
         #    ['RTE_ARM64_MEMCPY_STRICT_ALIGN', false],
 
         ['RTE_SCHED_VECTOR', false],
-        ['RTE_ARM_USE_WFE', false],
         ['RTE_ARCH_ARM64', true],
         ['RTE_CACHE_LINE_SIZE', 128]
 ]
@@ -371,6 +370,7 @@ socs = {
 
 dpdk_conf.set('RTE_ARCH_ARM', 1)
 dpdk_conf.set('RTE_FORCE_INTRINSICS', 1)
+dpdk_conf.set('RTE_ARM_USE_WFE', get_option('use_wfe'))
 
 if dpdk_conf.get('RTE_ARCH_32')
     # armv7 build
diff --git a/meson_options.txt b/meson_options.txt
index 56bdfd0f0a..5012803c77 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -44,3 +44,5 @@ option('tests', type: 'boolean', value: true, description:
        'build unit tests')
 option('use_hpet', type: 'boolean', value: false, description:
        'use HPET timer in EAL')
+option('use_wfe', type: 'boolean', value: false, description:
+       'use Wait Until Equal for polling loops')
-- 
2.25.1