config/arm: disable libnuma in cross builds

Some Arm SoCs are not NUMA systems. Add the capability to disable NUMA
for cross build and disable NUMA in Arm cross files.

Signed-off-by: Juraj Linkeš <juraj.linkes@pantheon.tech>
Reviewed-by: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>
Acked-by: Jerin Jacob <jerinj@marvell.com>
Tested-by: Jerin Jacob <jerinj@marvell.com>
Tested-by: Pavan Nikhilesh <pbhagavatula@marvell.com>
Tested-by: Vimal Chungath <vcchunga@amazon.com>
Tested-by: Dharmik Thakkar <dharmik.thakkar@arm.com>

config/arm/arm64_armada_linux_gcc

@@ -18,3 +18,4 @@ implementer_id = '0x56'
 part_number = '0xd08'
 max_lcores = 16
 max_numa_nodes = 1
+numa = false

config/arm/arm64_bluefield_linux_gcc

@@ -17,3 +17,4 @@ implementer_id = '0x41'
 part_number = '0xd08'
 max_lcores = 16
 max_numa_nodes = 1
+numa = false

config/arm/arm64_dpaa_linux_gcc

@@ -18,3 +18,4 @@ implementer_id = 'dpaa'
 part_number = '0xd08'
 max_lcores = 16
 max_numa_nodes = 1
+numa = false

config/arm/arm64_graviton2_linux_gcc

@@ -17,3 +17,4 @@ implementor_id = '0x41'
 implementor_pn = '0xd0c'
 max_lcores = 64
 max_numa_nodes = 1
+numa = false

config/arm/arm64_n1sdp_linux_gcc

@@ -17,3 +17,4 @@ implementer_id = '0x41'
 part_number = '0xd0c'
 max_lcores = 4
 max_numa_nodes = 1
+numa = false

config/arm/arm64_n2_linux_gcc

@@ -17,3 +17,4 @@ implementer_id = '0x41'
 part_number = '0xd49'
 max_lcores = 64
 max_numa_nodes = 1
+numa = false

config/arm/arm64_octeontx2_linux_gcc

@@ -17,3 +17,4 @@ implementer_id = '0x43'
 part_number = '0xb2'
 max_lcores = 36
 max_numa_nodes = 1
+numa = false

config/arm/arm64_stingray_linux_gcc

@@ -17,3 +17,4 @@ implementer_id = '0x41'
 part_number = '0xd08'
 max_lcores = 16
 max_numa_nodes = 1
+numa = false

config/arm/meson.build

@@ -59,8 +59,6 @@ part_number_config_arm = {
 		'flags': [
 			['RTE_MACHINE', '"neoverse-n1"'],
 			['RTE_ARM_FEATURE_ATOMICS', true],
-			['RTE_EAL_NUMA_AWARE_HUGEPAGES', false],
-			['RTE_LIBRTE_VHOST_NUMA', false],
 			['RTE_MAX_MEM_MB', 1048576],
 			['RTE_MAX_LCORE', 80]
 		]
@@ -70,8 +68,6 @@ part_number_config_arm = {
 		'flags': [
 			['RTE_MACHINE', '"neoverse-n2"'],
 			['RTE_ARM_FEATURE_ATOMICS', true],
-			['RTE_EAL_NUMA_AWARE_HUGEPAGES', false],
-			['RTE_LIBRTE_VHOST_NUMA', false],
 			['RTE_MAX_LCORE', 64]
 		]
 	}

config/meson.build

@@ -142,12 +142,19 @@ endif
 
 # check for libraries used in multiple places in DPDK
 has_libnuma = 0
-numa_dep = cc.find_library('numa', required: false)
+find_libnuma = true
-if numa_dep.found() and cc.has_header('numaif.h')
+if meson.is_cross_build() and not meson.get_cross_property('numa', true)
-	dpdk_conf.set10('RTE_HAS_LIBNUMA', true)
+	# don't look for libnuma if explicitly disabled in cross build
-	has_libnuma = 1
+	find_libnuma = false
-	add_project_link_arguments('-lnuma', language: 'c')
+endif
-	dpdk_extra_ldflags += '-lnuma'
+if find_libnuma
+	numa_dep = cc.find_library('numa', required: false)
+	if numa_dep.found() and cc.has_header('numaif.h')
+		dpdk_conf.set10('RTE_HAS_LIBNUMA', true)
+		has_libnuma = 1
+		add_project_link_arguments('-lnuma', language: 'c')
+		dpdk_extra_ldflags += '-lnuma'
+	endif
 endif
 
 has_libfdt = 0

doc/guides/linux_gsg/cross_build_dpdk_for_arm64.rst

@@ -143,3 +143,7 @@ There are other options you may specify in a cross file to tailor the build::
    Supported extra configuration
       max_numa_nodes = n  # will set RTE_MAX_NUMA_NODES
       max_lcores = n      # will set RTE_MAX_LCORE
+
+      numa = false        # set to false to force building for a non-NUMA system
+         # if not set or set to true, the build system will build for a NUMA
+         # system only if libnuma is installed