[dpdk-dev] [PATCH] config/arm: add checking SVE cpuflag
Ruifeng Wang
Ruifeng.Wang at arm.com
Mon Jun 21 07:56:38 CEST 2021
> -----Original Message-----
> From: Chengwen Feng <fengchengwen at huawei.com>
> Sent: Friday, May 21, 2021 11:34 AM
> To: thomas at monjalon.net; ferruh.yigit at intel.com
> Cc: dev at dpdk.org; viktorin at rehivetech.com; Ruifeng Wang
> <Ruifeng.Wang at arm.com>; jerinj at marvell.com;
> bruce.richardson at intel.com
> Subject: [PATCH] config/arm: add checking SVE cpuflag
>
> If compiled with SVE feature (e.g. "-march=armv8.2-a+sve'), the binary could
> not run on non-SVE platform else it will encounter illegal instruction [1].
>
> This patch fixes it by add 'RTE_CPUFLAG_SVE' to compile_time_cpuflags, so
> that rte_cpu_is_supported() will print meaningful log under above situation.
>
> [1] http://mails.dpdk.org/archives/dev/2021-May/209124.html
>
> Signed-off-by: Chengwen Feng <fengchengwen at huawei.com>
> ---
> config/arm/meson.build | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/config/arm/meson.build b/config/arm/meson.build index
> e83a56e..9b147c0 100644
> --- a/config/arm/meson.build
> +++ b/config/arm/meson.build
> @@ -480,6 +480,10 @@ if (cc.get_define('__ARM_NEON', args:
> machine_args) != '' or
> compile_time_cpuflags += ['RTE_CPUFLAG_NEON'] endif
>
> +if cc.get_define('__ARM_FEATURE_SVE', args: machine_args) != ''
> + compile_time_cpuflags += ['RTE_CPUFLAG_SVE'] endif
> +
> if cc.get_define('__ARM_FEATURE_CRC32', args: machine_args) != ''
> compile_time_cpuflags += ['RTE_CPUFLAG_CRC32'] endif
> --
> 2.8.1
Thanks for the patch.
Acked-by: Ruifeng Wang <ruifeng.wang at arm.com>
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