From: "Björn Töpel" <bjorn@kernel.org>
To: Xiao Wang <xiao.w.wang@intel.com>,
paul.walmsley@sifive.com, palmer@dabbelt.com,
aou@eecs.berkeley.edu, luke.r.nels@gmail.com, xi.wang@gmail.com
Cc: ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org,
martin.lau@linux.dev, eddyz87@gmail.com, song@kernel.org,
yonghong.song@linux.dev, john.fastabend@gmail.com,
kpsingh@kernel.org, sdf@google.com, haoluo@google.com,
jolsa@kernel.org, linux-riscv@lists.infradead.org,
linux-kernel@vger.kernel.org, bpf@vger.kernel.org,
pulehui@huawei.com, haicheng.li@intel.com,
Xiao Wang <xiao.w.wang@intel.com>
Subject: Re: [PATCH] riscv, bpf: try RVC for reg move within BPF_CMPXCHG JIT
Date: Tue, 21 May 2024 18:35:39 +0200 [thread overview]
Message-ID: <87a5kjdsx0.fsf@all.your.base.are.belong.to.us> (raw)
In-Reply-To: <20240519050507.2217791-1-xiao.w.wang@intel.com>
Xiao Wang <xiao.w.wang@intel.com> writes:
> We could try to emit compressed insn for reg move operation during CMPXCHG
> JIT, the instruction compression has no impact on the jump offsets of
> following forward and backward jump instructions.
...and at some point we should start supporting Zacas and friends,
instead of lr/sc.
> Signed-off-by: Xiao Wang <xiao.w.wang@intel.com>
Acked-by: Björn Töpel <bjorn@kernel.org>
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next prev parent reply other threads:[~2024-05-21 16:35 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-19 5:05 [PATCH] riscv, bpf: try RVC for reg move within BPF_CMPXCHG JIT Xiao Wang
2024-05-21 16:35 ` Björn Töpel [this message]
2024-05-24 15:50 ` patchwork-bot+netdevbpf
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