[v9,06/14] build: organize Arm config into dict

Use dictionary lookup instead of checking for existing variables,
iterating over all elements in the list or checking lists for optional
configuration. Move variable contents into the dictionary for variables
that would be referenced only once.
Fallback to generic part number if the discovered part number is
unknown.

Signed-off-by: Juraj Linkeš <juraj.linkes@pantheon.tech>
---
 config/arm/meson.build | 298 ++++++++++++++++++++++++-----------------
 1 file changed, 178 insertions(+), 120 deletions(-)
  

<snip>

> 
> Use dictionary lookup instead of checking for existing variables, iterating over
> all elements in the list or checking lists for optional configuration. Move
> variable contents into the dictionary for variables that would be referenced
> only once.
> Fallback to generic part number if the discovered part number is unknown.
> 
> Signed-off-by: Juraj Linkeš <juraj.linkes@pantheon.tech>
Reviewed-by: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>
> ---
>  config/arm/meson.build | 298 ++++++++++++++++++++++++-----------------
>  1 file changed, 178 insertions(+), 120 deletions(-)
> 
> diff --git a/config/arm/meson.build b/config/arm/meson.build index
> 0f8a94ffe..eb15848cb 100644
> --- a/config/arm/meson.build
> +++ b/config/arm/meson.build
> @@ -28,115 +28,166 @@ flags_common = [
>  	['RTE_CACHE_LINE_SIZE', 128]
>  ]
> 
> -# implementer specific aarch64 flags, with middle priority -# (will overwrite
> common flags) -flags_implementer_generic = [
> -	['RTE_MACHINE', '"armv8a"'],
> -	['RTE_USE_C11_MEM_MODEL', true],
> -	['RTE_CACHE_LINE_SIZE', 128],
> -	['RTE_MAX_LCORE', 256]
> -]
> -flags_implementer_arm = [
> -	['RTE_MACHINE', '"armv8a"'],
> -	['RTE_USE_C11_MEM_MODEL', true],
> -	['RTE_CACHE_LINE_SIZE', 64],
> -	['RTE_MAX_LCORE', 16]
> -]
> -flags_implementer_cavium = [
> -	['RTE_MAX_VFIO_GROUPS', 128],
> -	['RTE_CACHE_LINE_SIZE', 128],
> -	['RTE_MAX_LCORE', 96],
> -	['RTE_MAX_NUMA_NODES', 2]
> -]
> -flags_implementer_dpaa = [
> -	['RTE_MACHINE', '"dpaa"'],
> -	['RTE_LIBRTE_DPAA2_USE_PHYS_IOVA', false],
> -	['RTE_USE_C11_MEM_MODEL', true],
> -	['RTE_CACHE_LINE_SIZE', 64],
> -	['RTE_MAX_LCORE', 16],
> -	['RTE_MAX_NUMA_NODES', 1]
> -]
> -flags_implementer_emag = [
> -	['RTE_MACHINE', '"emag"'],
> -	['RTE_CACHE_LINE_SIZE', 64],
> -	['RTE_MAX_LCORE', 32],
> -	['RTE_MAX_NUMA_NODES', 1]
> -]
> -flags_implementer_armada = [
> -	['RTE_MACHINE', '"armv8a"'],
> -	['RTE_CACHE_LINE_SIZE', 64],
> -	['RTE_MAX_LCORE', 16],
> -	['RTE_MAX_NUMA_NODES', 1]
> -]
> +## Part numbers are specific to Arm implementers # implementer specific
> +aarch64 flags have middle priority
> +#     (will overwrite common flags)
> +# part number specific aarch64 flags have the highest priority
> +#     (will overwrite both common and implementer specific flags)
> +implementer_generic = {
> +	'description': 'Generic armv8',
> +	'flags': [
> +		['RTE_MACHINE', '"armv8a"'],
> +		['RTE_USE_C11_MEM_MODEL', true],
> +		['RTE_CACHE_LINE_SIZE', 128],
> +		['RTE_MAX_LCORE', 256]
> +	],
> +	'part_number_config': {
> +		'generic': {'machine_args': ['-march=armv8-a+crc',
> +					     '-moutline-atomics']}
> +	}
> +}
> +
> +part_number_config_arm = {
> +	'generic': {'machine_args':  ['-march=armv8-a+crc',
> +				      '-moutline-atomics']},
> +	'native': {'machine_args':  ['-march=native']},
> +	'0xd03': {'machine_args':  ['-mcpu=cortex-a53']},
> +	'0xd04': {'machine_args':  ['-mcpu=cortex-a35']},
> +	'0xd07': {'machine_args':  ['-mcpu=cortex-a57']},
> +	'0xd08': {'machine_args':  ['-mcpu=cortex-a72']},
> +	'0xd09': {'machine_args':  ['-mcpu=cortex-a73']},
> +	'0xd0a': {'machine_args':  ['-mcpu=cortex-a75']},
> +	'0xd0b': {'machine_args':  ['-mcpu=cortex-a76']},
> +	'0xd0c': {
> +		'machine_args':  ['-march=armv8.2-a+crypto',
> +				  '-mcpu=neoverse-n1'],
> +		'flags': [
> +			['RTE_MACHINE', '"neoverse-n1"'],
> +			['RTE_ARM_FEATURE_ATOMICS', true],
> +			['RTE_USE_C11_MEM_MODEL', true],
> +			['RTE_EAL_NUMA_AWARE_HUGEPAGES', false],
> +			['RTE_LIBRTE_VHOST_NUMA', false],
> +			['RTE_MAX_MEM_MB', 1048576],
> +			['RTE_CACHE_LINE_SIZE', 64],
> +			['RTE_MAX_LCORE', 64],
> +			['RTE_MAX_NUMA_NODES', 1]
> +		]
> +	}
> +}
> +implementer_arm = {
> +	'description': 'Arm',
> +	'flags': [
> +		['RTE_MACHINE', '"armv8a"'],
> +		['RTE_USE_C11_MEM_MODEL', true],
> +		['RTE_CACHE_LINE_SIZE', 64],
> +		['RTE_MAX_LCORE', 16]
> +	],
> +	'part_number_config': part_number_config_arm }
> 
> -# part number specific aarch64 flags, with highest priority -# (will overwrite
> both common and implementer specific flags)  flags_part_number_thunderx
> = [
>  	['RTE_MACHINE', '"thunderx"'],
>  	['RTE_USE_C11_MEM_MODEL', false]
>  ]
> -flags_part_number_thunderx2 = [
> -	['RTE_MACHINE', '"thunderx2"'],
> -	['RTE_ARM_FEATURE_ATOMICS', true],
> -	['RTE_USE_C11_MEM_MODEL', true],
> -	['RTE_CACHE_LINE_SIZE', 64],
> -	['RTE_MAX_LCORE', 256],
> -	['RTE_MAX_NUMA_NODES', 2]
> -]
> -flags_part_number_octeontx2 = [
> -	['RTE_MACHINE', '"octeontx2"'],
> -	['RTE_ARM_FEATURE_ATOMICS', true],
> -	['RTE_USE_C11_MEM_MODEL', true],
> -	['RTE_EAL_IGB_UIO', false],
> -	['RTE_MAX_LCORE', 36],
> -	['RTE_MAX_NUMA_NODES', 1]
> -]
> -flags_part_number_n1generic = [
> -	['RTE_MACHINE', '"neoverse-n1"'],
> -	['RTE_ARM_FEATURE_ATOMICS', true],
> -	['RTE_USE_C11_MEM_MODEL', true],
> -	['RTE_EAL_NUMA_AWARE_HUGEPAGES', false],
> -	['RTE_LIBRTE_VHOST_NUMA', false],
> -	['RTE_MAX_MEM_MB', 1048576],
> -	['RTE_CACHE_LINE_SIZE', 64],
> -	['RTE_MAX_LCORE', 64],
> -	['RTE_MAX_NUMA_NODES', 1]
> -]
> +implementer_cavium = {
> +	'description': 'Cavium',
> +	'flags': [
> +		['RTE_MAX_VFIO_GROUPS', 128],
> +		['RTE_CACHE_LINE_SIZE', 128],
> +		['RTE_MAX_LCORE', 96],
> +		['RTE_MAX_NUMA_NODES', 2]
> +	],
> +	'part_number_config': {
> +		'generic': {'machine_args': ['-march=armv8-a+crc+crypto',
> +					     '-mcpu=thunderx']},
> +		'native': {'machine_args': ['-march=native']},
> +		'0xa1': {
> +			'machine_args': ['-mcpu=thunderxt88'],
> +			'flags': flags_part_number_thunderx
> +		},
> +		'0xa2': {
> +			'machine_args': ['-mcpu=thunderxt81'],
> +			'flags': flags_part_number_thunderx
> +		},
> +		'0xa3': {
> +			'machine_args': ['-mcpu=thunderxt83'],
> +			'flags': flags_part_number_thunderx
> +		},
> +		'0xaf': {
> +			'machine_args': ['-march=armv8.1-a+crc+crypto',
> +					 '-mcpu=thunderx2t99'],
> +			'flags': [
> +				['RTE_MACHINE', '"thunderx2"'],
> +				['RTE_ARM_FEATURE_ATOMICS', true],
> +				['RTE_USE_C11_MEM_MODEL', true],
> +				['RTE_CACHE_LINE_SIZE', 64],
> +				['RTE_MAX_LCORE', 256],
> +				['RTE_MAX_NUMA_NODES', 2]
> +			]
> +		},
> +		'0xb2': {
> +			'machine_args': ['-march=armv8.2-a+crc+crypto+lse',
> +					 '-mcpu=octeontx2'],
> +			'flags': [
> +				['RTE_MACHINE', '"octeontx2"'],
> +				['RTE_ARM_FEATURE_ATOMICS', true],
> +				['RTE_USE_C11_MEM_MODEL', true],
> +				['RTE_EAL_IGB_UIO', false],
> +				['RTE_MAX_LCORE', 36],
> +				['RTE_MAX_NUMA_NODES', 1]
> +			]
> +		}
> +	}
> +}
> 
> -# arm config (implementer 0x41) is the default config -
> part_number_config_arm = [
> -	['generic', ['-march=armv8-a+crc', '-moutline-atomics']],
> -	['native', ['-march=native']],
> -	['0xd03', ['-mcpu=cortex-a53']],
> -	['0xd04', ['-mcpu=cortex-a35']],
> -	['0xd07', ['-mcpu=cortex-a57']],
> -	['0xd08', ['-mcpu=cortex-a72']],
> -	['0xd09', ['-mcpu=cortex-a73']],
> -	['0xd0a', ['-mcpu=cortex-a75']],
> -	['0xd0b', ['-mcpu=cortex-a76']],
> -	['0xd0c', ['-march=armv8.2-a+crypto', '-mcpu=neoverse-n1'],
> flags_part_number_n1generic]
> -]
> -part_number_config_cavium = [
> -	['generic', ['-march=armv8-a+crc+crypto','-mcpu=thunderx']],
> -	['native', ['-march=native']],
> -	['0xa1', ['-mcpu=thunderxt88'], flags_part_number_thunderx],
> -	['0xa2', ['-mcpu=thunderxt81'], flags_part_number_thunderx],
> -	['0xa3', ['-mcpu=thunderxt83'], flags_part_number_thunderx],
> -	['0xaf', ['-march=armv8.1-a+crc+crypto','-mcpu=thunderx2t99'],
> flags_part_number_thunderx2],
> -	['0xb2', ['-march=armv8.2-a+crc+crypto+lse','-mcpu=octeontx2'],
> flags_part_number_octeontx2]
> -]
> -part_number_config_emag = [
> -	['generic', ['-march=armv8-a+crc+crypto', '-mtune=emag']],
> -	['native', ['-march=native']]
> -]
> +implementer_ampere = {
> +	'description': 'Ampere Computing',
> +	'flags': [
> +		['RTE_MACHINE', '"emag"'],
> +		['RTE_CACHE_LINE_SIZE', 64],
> +		['RTE_MAX_LCORE', 32],
> +		['RTE_MAX_NUMA_NODES', 1]
> +	],
> +	'part_number_config': {
> +		'generic': {'machine_args':  ['-march=armv8-a+crc+crypto',
> +					      '-mtune=emag']},
> +		'native': {'machine_args':  ['-march=native']}
> +	}
> +}
> +
> +implementer_marvell = {
> +	'description': 'Marvell ARMADA',
> +	'flags': [
> +		['RTE_MACHINE', '"armv8a"'],
> +		['RTE_CACHE_LINE_SIZE', 64],
> +		['RTE_MAX_LCORE', 16],
> +		['RTE_MAX_NUMA_NODES', 1]
> +	],
> +	'part_number_config': part_number_config_arm }
> +
> +implementer_dpaa = {
> +	'description': 'NXP DPAA',
> +	'flags': [
> +		['RTE_MACHINE', '"dpaa"'],
> +		['RTE_LIBRTE_DPAA2_USE_PHYS_IOVA', false],
> +		['RTE_USE_C11_MEM_MODEL', true],
> +		['RTE_CACHE_LINE_SIZE', 64],
> +		['RTE_MAX_LCORE', 16],
> +		['RTE_MAX_NUMA_NODES', 1]
> +	],
> +	'part_number_config': part_number_config_arm }
> 
> -## Arm implementer ID (MIDR in Arm Architecture Reference Manual) -
> implementer_generic = ['Generic armv8', flags_implementer_generic,
> part_number_config_arm]
> -implementer_0x41 = ['Arm', flags_implementer_arm,
> part_number_config_arm]
> -implementer_0x43 = ['Cavium', flags_implementer_cavium,
> part_number_config_cavium]
> -implementer_0x50 = ['Ampere Computing', flags_implementer_emag,
> part_number_config_emag]
> -implementer_0x56 = ['Marvell ARMADA', flags_implementer_armada,
> part_number_config_arm] -implementer_dpaa = ['NXP DPAA',
> flags_implementer_dpaa, part_number_config_arm]
> +## Arm implementers (ID from MIDR in Arm Architecture Reference
> Manual)
> +implementers = {
> +	'generic': implementer_generic,
> +	'0x41': implementer_arm,
> +	'0x43': implementer_cavium,
> +	'0x50': implementer_ampere,
> +	'0x56': implementer_marvell,
> +	'dpaa': implementer_dpaa
> +}
> 
>  dpdk_conf.set('RTE_ARCH_ARM', 1)
>  dpdk_conf.set('RTE_FORCE_INTRINSICS', 1) @@ -152,7 +203,7 @@ else
>  	implementer_id = 'generic'
>  	if machine == 'generic' and not meson.is_cross_build()
>  		# generic build
> -		implementer_config = implementer_generic
> +		implementer_config = implementer['generic']
>  		part_number = 'generic'
>  	elif not meson.is_cross_build()
>  		# native build
> @@ -167,9 +218,9 @@ else
>  			part_number = cmd_output[3]
>  		endif
>  		# Set to generic if variable is not found
> -		implementer_config = get_variable('implementer_' +
> implementer_id, ['generic'])
> +		implementer_config = implementers.get(implementer_id,
> ['generic'])
>  		if implementer_config[0] == 'generic'
> -			implementer_config = implementer_generic
> +			implementer_config = implementer['generic']
>  			part_number = 'generic'
>  		endif
>  		if arm_force_native_march == true
> @@ -179,28 +230,35 @@ else
>  		# cross build
>  		implementer_id =
> meson.get_cross_property('implementer_id', 'generic')
>  		part_number = meson.get_cross_property('part_number',
> 'generic')
> -		implementer_config = get_variable('implementer_' +
> implementer_id)
> +		implementer_config = implementers.get(implementer_id)
>  	endif
> 
> -	message('Arm implementer: ' + implementer_config[0])
> +	message('Arm implementer: ' + implementer_config['description'])
>  	message('Arm part number: ' + part_number)
> 
> +	part_number_config = implementer_config['part_number_config']
> +	if part_number_config.has_key(part_number)
> +		# use the specified part_number machine args if found
> +		part_number_config = part_number_config[part_number]
> +	elif not meson.is_cross_build()
> +		# default to generic machine args if part_number is not found
> +		# and not forcing native machine args
> +		# but don't default in cross-builds; if part_number is specified
> +		# incorrectly in a cross-file, it needs to be fixed there
> +		part_number_config = part_number_config['generic']
> +	else
> +		# doing cross build and part number is not in
> part_number_config
> +		error('Cross build part number 0@0 not
> found.'.format(part_number))
> +	endif
> +
>  	# use default flags with implementer flags
> -	dpdk_flags = flags_common + implementer_config[1]
> +	dpdk_flags = flags_common + implementer_config['flags'] +
> +part_number_config.get('flags', [])
> 
> +	# apply supported machine args
>  	machine_args = [] # Clear previous machine args
> -	foreach marg: implementer_config[2]
> -		if marg[0] == part_number
> -			# apply supported machine args
> -			foreach flag: marg[1]
> -				if cc.has_argument(flag)
> -					machine_args += flag
> -				endif
> -			endforeach
> -			if marg.length() > 2
> -				# add extra flags for the part
> -				dpdk_flags += marg[2]
> -			endif
> +	foreach flag: part_number_config['machine_args']
> +		if cc.has_argument(flag)
> +			machine_args += flag
>  		endif
>  	endforeach
> 
> --
> 2.20.1