From: "Russell King (Oracle)" <linux@armlinux.org.uk>
To: Puranjay Mohan <puranjay12@gmail.com>
Cc: Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Andrii Nakryiko <andrii@kernel.org>,
Martin KaFai Lau <martin.lau@linux.dev>,
Song Liu <song@kernel.org>,
Yonghong Song <yonghong.song@linux.dev>,
John Fastabend <john.fastabend@gmail.com>,
KP Singh <kpsingh@kernel.org>,
Stanislav Fomichev <sdf@google.com>, Hao Luo <haoluo@google.com>,
Jiri Olsa <jolsa@kernel.org>,
Shubham Bansal <illusionist.neo@gmail.com>,
Mykola Lysenko <mykolal@fb.com>, Shuah Khan <shuah@kernel.org>,
bpf@vger.kernel.org, linux-kselftest@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH bpf-next v3 6/9] arm32, bpf: add support for 64 bit division instruction
Date: Fri, 8 Sep 2023 09:36:21 +0100 [thread overview]
Message-ID: <ZPrdBeHZp8nsBsRq@shell.armlinux.org.uk> (raw)
In-Reply-To: <20230907230550.1417590-7-puranjay12@gmail.com>
On Thu, Sep 07, 2023 at 11:05:47PM +0000, Puranjay Mohan wrote:
> ARM32 doesn't have instructions to do 64-bit/64-bit divisions. So, to
> implement the following instructions:
> BPF_ALU64 | BPF_DIV
> BPF_ALU64 | BPF_MOD
> BPF_ALU64 | BPF_SDIV
> BPF_ALU64 | BPF_SMOD
>
> We implement the above instructions by doing function calls to div64_u64()
> and div64_u64_rem() for unsigned division/mod and calls to div64_s64()
> for signed division/mod.
>
> Signed-off-by: Puranjay Mohan <puranjay12@gmail.com>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Thanks!
--
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
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next prev parent reply other threads:[~2023-09-08 8:36 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-07 23:05 [PATCH bpf-next v3 0/9] arm32, bpf: add support for cpuv4 insns Puranjay Mohan
2023-09-07 23:05 ` [PATCH bpf-next v3 1/9] arm32, bpf: add support for 32-bit offset jmp instruction Puranjay Mohan
2023-09-07 23:05 ` [PATCH bpf-next v3 2/9] arm32, bpf: add support for sign-extension load instruction Puranjay Mohan
2023-09-07 23:05 ` [PATCH bpf-next v3 3/9] arm32, bpf: add support for sign-extension mov instruction Puranjay Mohan
2023-09-07 23:05 ` [PATCH bpf-next v3 4/9] arm32, bpf: add support for unconditional bswap instruction Puranjay Mohan
2023-09-08 8:34 ` Russell King (Oracle)
2023-09-07 23:05 ` [PATCH bpf-next v3 5/9] arm32, bpf: add support for 32-bit signed division Puranjay Mohan
2023-09-07 23:05 ` [PATCH bpf-next v3 6/9] arm32, bpf: add support for 64 bit division instruction Puranjay Mohan
2023-09-08 8:36 ` Russell King (Oracle) [this message]
2023-09-07 23:05 ` [PATCH bpf-next v3 7/9] selftest, bpf: enable cpu v4 tests for arm32 Puranjay Mohan
2023-09-07 23:05 ` [PATCH bpf-next v3 8/9] bpf/tests: add tests for cpuv4 instructions Puranjay Mohan
2023-09-26 6:45 ` kernel test robot
2023-09-07 23:05 ` [PATCH bpf-next v3 9/9] MAINTAINERS: Add myself for ARM32 BPF JIT maintainer Puranjay Mohan
2023-09-08 8:37 ` Russell King (Oracle)
2023-09-08 8:38 ` Puranjay Mohan
2023-09-08 13:49 ` Daniel Borkmann
2023-09-08 14:49 ` Puranjay Mohan
2023-09-16 0:18 ` Alexei Starovoitov
2023-09-16 0:20 ` [PATCH bpf-next v3 0/9] arm32, bpf: add support for cpuv4 insns patchwork-bot+netdevbpf
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