From: Yongseok Koh Date: Tue, 7 May 2019 21:11:40 +0000 (-0700) Subject: config: disable armv8 crypto extension X-Git-Url: http://git.droids-corp.org/?p=dpdk.git;a=commitdiff_plain;h=e404de13054a4149253ddd3fb1f179a4c7d7ae4d config: disable armv8 crypto extension Per armv8 crypto extension support, make build always enable it by default as long as compiler supports the feature while meson build only enables it for 'default' machine of generic armv8 architecture. It is known that not all the armv8 platforms have the crypto extension. For example, Mellanox BlueField has a variant which doesn't have it. If crypto enabled binary runs on such a platform, rte_eal_init() fails. '+crypto' flag currently implies only '+aes' and '+sha2' and enabling it will generate the crypto instructions only when crypto intrinsics are used. For the devices supporting 8.2 crypto or newer, compiler could generate such instructions beyond intrinsics or asm code. For example, compiler can generate 3-way exclusive OR instructions if sha3 is supported. However, it has to be enabled by adding '+sha3' as of today. In DPDK, armv8 cryptodev is the only one which requires the crypto support. As it even uses external library of Marvell which is compiled out of DPDK with crypto support and there's run-time check for required cpuflags, crypto support can be disabled in DPDK. Cc: stable@dpdk.org Signed-off-by: Yongseok Koh Acked-by: Jerin Jacob Tested-by: Dharmik Thakkar Reviewed-by: Honnappa Nagarahalli --- diff --git a/config/arm/meson.build b/config/arm/meson.build index 7fa6ed3105..abc8cf346c 100644 --- a/config/arm/meson.build +++ b/config/arm/meson.build @@ -74,7 +74,7 @@ flags_octeontx2_extra = [ ['RTE_USE_C11_MEM_MODEL', true]] machine_args_generic = [ - ['default', ['-march=armv8-a+crc+crypto']], + ['default', ['-march=armv8-a+crc']], ['native', ['-march=native']], ['0xd03', ['-mcpu=cortex-a53']], ['0xd04', ['-mcpu=cortex-a35']], diff --git a/doc/guides/rel_notes/release_19_08.rst b/doc/guides/rel_notes/release_19_08.rst index a17e7dea51..c199270c5c 100644 --- a/doc/guides/rel_notes/release_19_08.rst +++ b/doc/guides/rel_notes/release_19_08.rst @@ -69,6 +69,8 @@ Removed Items * Removed KNI ethtool, CONFIG_RTE_KNI_KMOD_ETHTOOL, support. +* build: armv8 crypto extension is disabled. + API Changes ----------- diff --git a/mk/machine/armv8a/rte.vars.mk b/mk/machine/armv8a/rte.vars.mk index 8252efbb7b..5e3ffc3adf 100644 --- a/mk/machine/armv8a/rte.vars.mk +++ b/mk/machine/armv8a/rte.vars.mk @@ -28,4 +28,4 @@ # CPU_LDFLAGS = # CPU_ASFLAGS = -MACHINE_CFLAGS += -march=armv8-a+crc+crypto +MACHINE_CFLAGS += -march=armv8-a+crc