From: Louis Peens <louis.peens@corigine.com>
To: Jakub Kicinski <kuba@kernel.org>
Cc: "Yonghong Song" <yonghong.song@linux.dev>,
"Shubham Bansal" <illusionist.neo@gmail.com>,
"Johan Almbladh" <johan.almbladh@anyfinetworks.com>,
"Paul Burton" <paulburton@kernel.org>,
"Naveen N. Rao" <naveen.n.rao@linux.ibm.com>,
"Michael Ellerman" <mpe@ellerman.id.au>,
"Luke Nelson" <luke.r.nels@gmail.com>,
"Xi Wang" <xi.wang@gmail.com>, "Björn Töpel" <bjorn@kernel.org>,
"Ilya Leoshkevich" <iii@linux.ibm.com>,
"Heiko Carstens" <hca@linux.ibm.com>,
"Vasily Gorbik" <gor@linux.ibm.com>,
"David S. Miller" <davem@davemloft.net>,
"Wang YanQing" <udknight@gmail.com>,
"Alexei Starovoitov" <ast@kernel.org>,
"Daniel Borkmann" <daniel@iogearbox.net>,
"Andrii Nakryiko" <andrii@kernel.org>,
"Martin KaFai Lau" <martin.lau@kernel.org>,
bpf <bpf@vger.kernel.org>
Subject: Re: bpf: Request to add -mcpu=v4 support for ARM/MIPS/NFP/POWERPC/RISCV/S390/SPARC/X86_32
Date: Tue, 22 Aug 2023 12:06:57 +0200 [thread overview]
Message-ID: <ZOSIwWu4nJuYayJn@LouisNoVo> (raw)
In-Reply-To: <20230821124711.15babfee@kernel.org>
On Mon, Aug 21, 2023 at 12:47:11PM -0700, Jakub Kicinski wrote:
> On Sat, 19 Aug 2023 18:41:30 -0700 Yonghong Song wrote:
> > Hi,
> >
> > A new set of bpf insns have been recently added in llvm with flag
> > [-mcpu=v4](https://reviews.llvm.org/D144829). In the kernel,
> > x86_64 and arm64 have implemented -mcpu=v4 support:
> > x86_64:
> > https://lore.kernel.org/all/20230728011143.3710005-1-yonghong.song@linux.dev/
> > arm64:
> > https://lore.kernel.org/bpf/20230815154158.717901-1-xukuohai@huaweicloud.com/
> >
> > The following arch's do not have -mcpu=v4 support yet:
> > arm, mips, nfp, powerpc, riscv, sc90, sparc and x86_32
> >
> > If you have a chance, could you take a look at what
> > x86_64/arm64 does and add support to the above arch'es?
>
> Louis, is anyone on your side still working on BPF for NFP?
> div/mod and the jump will be impossible but there may be instructions
> for sign extend or bswap?
There isn't a lot of activity on the BPF side for nfp, but here and
there some things do get addressed. I will run it past the team, it does
seem like those might be possible with the architecture - thanks for the
ping.
prev parent reply other threads:[~2023-08-22 10:07 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-20 1:41 bpf: Request to add -mcpu=v4 support for ARM/MIPS/NFP/POWERPC/RISCV/S390/SPARC/X86_32 Yonghong Song
2023-08-21 2:23 ` Pu Lehui
2023-08-21 4:36 ` Yonghong Song
2023-08-21 19:47 ` Jakub Kicinski
2023-08-22 10:06 ` Louis Peens [this message]
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