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From: "Björn Töpel" <bjorn.topel@gmail.com>
To: Daniel Borkmann <daniel@iogearbox.net>,
	Alexei Starovoitov <ast@kernel.org>,
	Netdev <netdev@vger.kernel.org>
Cc: linux-riscv@lists.infradead.org, bpf <bpf@vger.kernel.org>
Subject: Re: [PATCH bpf-next 2/8] riscv, bpf: add support for far branching
Date: Tue, 10 Dec 2019 06:31:28 +0100	[thread overview]
Message-ID: <CAJ+HfNi=kDP--Vuuphdn4YhZDbBfoNXzcPDDaDo7vdvuJ0D1=Q@mail.gmail.com> (raw)
In-Reply-To: <20191209173136.29615-3-bjorn.topel@gmail.com>

On Mon, 9 Dec 2019 at 18:31, Björn Töpel <bjorn.topel@gmail.com> wrote:
>
> This commit adds branch relaxation to the BPF JIT, and with that
> support for far (offset greater than 12b) branching.
>
> The branch relaxation requires more than two passes to converge. For
> most programs it is three passes, but for larger programs it can be
> more.
>
> Signed-off-by: Björn Töpel <bjorn.topel@gmail.com>
> ---
>  arch/riscv/net/bpf_jit_comp.c | 352 ++++++++++++++++++----------------
[...]
> +}
> +
> +static void emit_branch(u8 cond, u8 rd, u8 rs, int insn, int rvoff,

The "insn" is not used. I'll do a respin.

  parent reply	other threads:[~2019-12-10  5:31 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-09 17:31 [PATCH bpf-next 0/8] riscv: BPF JIT fix, optimizations and far jumps support Björn Töpel
2019-12-09 17:31 ` [PATCH bpf-next 1/8] riscv, bpf: fix broken BPF tail calls Björn Töpel
2019-12-09 17:31 ` [PATCH bpf-next 2/8] riscv, bpf: add support for far branching Björn Töpel
2019-12-09 21:08   ` Luke Nelson
2019-12-09 21:27     ` Daniel Borkmann
2019-12-10  7:02       ` Luke Nelson
2019-12-10  5:32     ` Björn Töpel
2019-12-10  5:31   ` Björn Töpel [this message]
2019-12-09 17:31 ` [PATCH bpf-next 3/8] riscv, bpf: add support for far jumps and exits Björn Töpel
2019-12-09 21:15   ` Luke Nelson
2019-12-09 17:31 ` [PATCH bpf-next 4/8] riscv, bpf: optimize BPF tail calls Björn Töpel
2019-12-09 17:31 ` [PATCH bpf-next 5/8] riscv, bpf: provide RISC-V specific JIT image alloc/free Björn Töpel
2019-12-09 17:31 ` [PATCH bpf-next 6/8] riscv, bpf: optimize calls Björn Töpel
2019-12-09 17:31 ` [PATCH bpf-next 7/8] riscv, bpf: add missing uapi header for BPF_PROG_TYPE_PERF_EVENT programs Björn Töpel
2019-12-09 17:31 ` [PATCH bpf-next 8/8] riscv, perf: add arch specific perf_arch_bpf_user_pt_regs Björn Töpel

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