[dpdk-stable] [PATCH v2 2/5] net/hns3: fix build with sve enabled
Ruifeng Wang
Ruifeng.Wang at arm.com
Mon Jan 11 03:27:06 CET 2021
> -----Original Message-----
> From: oulijun <oulijun at huawei.com>
> Sent: Saturday, January 9, 2021 10:16 AM
> To: Ruifeng Wang <Ruifeng.Wang at arm.com>; Wei Hu (Xavier)
> <xavier.huwei at huawei.com>; Min Hu (Connor) <humin29 at huawei.com>;
> Yisen Zhuang <yisen.zhuang at huawei.com>; Huisong Li
> <lihuisong at huawei.com>; Chengchang Tang
> <tangchengchang at huawei.com>; Chengwen Feng
> <fengchengwen at huawei.com>
> Cc: dev at dpdk.org; vladimir.medvedkin at intel.com; jerinj at marvell.com;
> hemant.agrawal at nxp.com; Honnappa Nagarahalli
> <Honnappa.Nagarahalli at arm.com>; nd <nd at arm.com>; stable at dpdk.org
> Subject: Re: [PATCH v2 2/5] net/hns3: fix build with sve enabled
>
>
>
> 在 2021/1/8 16:25, Ruifeng Wang 写道:
> > Building with SVE extension enabled stopped with error:
> >
> > error: ACLE function ‘svwhilelt_b64_s32’ requires ISA extension ‘sve’
> > 18 | #define PG64_256BIT svwhilelt_b64(0, 4)
> >
> > This is caused by unintentional cflags reset.
> > Fixed the issue by appending required flag to cflags instead of
> > overriding it.
> >
> > Fixes: 952ebacce4f2 ("net/hns3: support SVE Rx")
> > Cc: xavier.huwei at huawei.com
> > Cc: stable at dpdk.org
> >
> > Signed-off-by: Ruifeng Wang <ruifeng.wang at arm.com>
> > ---
> > drivers/net/hns3/meson.build | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/net/hns3/meson.build
> > b/drivers/net/hns3/meson.build index 45cee34d9..798086357 100644
> > --- a/drivers/net/hns3/meson.build
> > +++ b/drivers/net/hns3/meson.build
> > @@ -32,7 +32,7 @@ deps += ['hash']
> > if arch_subdir == 'arm' and dpdk_conf.get('RTE_ARCH_64')
> > sources += files('hns3_rxtx_vec.c')
> > if cc.get_define('__ARM_FEATURE_SVE', args: machine_args) != ''
> > - cflags = ['-DCC_SVE_SUPPORT']
> > + cflags += ['-DCC_SVE_SUPPORT']
> Hi
> I noticed this patch, but I checked that the hns3 driver did not use this
> function.How did you compile it?
Hi,
The hns3 driver has sve rx/tx implementation in hns3_rxtx_vec_sve.c. This path
will be enabled when compiling with sve feature enabled.
I compiled it by using gcc-10.2 with flag '-march=armv8.3-a+sve'.
You can try compile for n2 with the cross file added in this series (5/5).
Thanks,
Ruifeng
>
> Thanks
> Lijun Ou
> > sources += files('hns3_rxtx_vec_sve.c')
> > endif
> > endif
> >
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