Currently, the SVE code is compiled only when -march supports SVE (e.g. '-march=armv8.2a+sve'), there maybe some problem[1] with this approach.
The solution: a. If the minimum instruction set support SVE then compiles it. b. Else if the compiler support SVE then compiles it. c. Otherwise don't compile it. [1] https://mails.dpdk.org/archives/dev/2021-April/208189.html Fixes: 8c25b02b082a ("net/hns3: fix enabling SVE Rx/Tx") Fixes: 952ebacce4f2 ("net/hns3: support SVE Rx") Cc: sta...@dpdk.org Signed-off-by: Chengwen Feng <fengcheng...@huawei.com> --- drivers/net/hns3/hns3_rxtx.c | 2 +- drivers/net/hns3/meson.build | 13 +++++++++++++ 2 files changed, 14 insertions(+), 1 deletion(-) diff --git a/drivers/net/hns3/hns3_rxtx.c b/drivers/net/hns3/hns3_rxtx.c index 1d7a769..4ef20c6 100644 --- a/drivers/net/hns3/hns3_rxtx.c +++ b/drivers/net/hns3/hns3_rxtx.c @@ -2808,7 +2808,7 @@ hns3_get_default_vec_support(void) static bool hns3_get_sve_support(void) { -#if defined(RTE_ARCH_ARM64) && defined(__ARM_FEATURE_SVE) +#if defined(CC_SVE_SUPPORT) if (rte_vect_get_max_simd_bitwidth() < RTE_VECT_SIMD_256) return false; if (rte_cpu_get_flag_enabled(RTE_CPUFLAG_SVE)) diff --git a/drivers/net/hns3/meson.build b/drivers/net/hns3/meson.build index 53c7df7..8563d70 100644 --- a/drivers/net/hns3/meson.build +++ b/drivers/net/hns3/meson.build @@ -35,7 +35,20 @@ deps += ['hash'] if arch_subdir == 'arm' and dpdk_conf.get('RTE_ARCH_64') sources += files('hns3_rxtx_vec.c') + + # compile SVE when: + # a. support SVE in minimum instruction set baseline + # b. it's not minimum instruction set, but compiler support if cc.get_define('__ARM_FEATURE_SVE', args: machine_args) != '' + cflags += ['-DCC_SVE_SUPPORT'] sources += files('hns3_rxtx_vec_sve.c') + elif cc.has_argument('-march=armv8.2-a+sve') + cflags += ['-DCC_SVE_SUPPORT'] + hns3_sve_lib = static_library('hns3_sve_lib', + 'hns3_rxtx_vec_sve.c', + dependencies: [static_rte_ethdev], + include_directories: includes, + c_args: [cflags, '-march=armv8.2-a+sve']) + objs += hns3_sve_lib.extract_objects('hns3_rxtx_vec_sve.c') endif endif -- 2.8.1
