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Date: Thu, 16 May 2024 14:38:28 +0200
From: Andrew Jones <ajones@ventanamicro.com>
To: Xiao Wang <xiao.w.wang@intel.com>
Cc: paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, 
	luke.r.nels@gmail.com, xi.wang@gmail.com, bjorn@kernel.org, ast@kernel.org, 
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	song@kernel.org, yonghong.song@linux.dev, john.fastabend@gmail.com, 
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	pulehui@huawei.com, haicheng.li@intel.com, conor@kernel.org, 
	ben.dooks@codethink.co.uk
Subject: Re: [PATCH v3] riscv, bpf: Optimize zextw insn with Zba extension
Message-ID: <20240516-0ec6ff4ad0e23302003be51a@orel>
References: <20240516090430.493122-1-xiao.w.wang@intel.com>
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In-Reply-To: <20240516090430.493122-1-xiao.w.wang@intel.com>

On Thu, May 16, 2024 at 05:04:30PM GMT, Xiao Wang wrote:
> The Zba extension provides add.uw insn which can be used to implement
> zext.w with rs2 set as ZERO.
> 
> Signed-off-by: Xiao Wang <xiao.w.wang@intel.com>
> ---
> v3:
> * Remove the Kconfig dependencies on TOOLCHAIN_HAS_ZBA and
>   RISCV_ALTERNATIVE. (Andrew)
> v2:
> * Add Zba description in the Kconfig. (Lehui)
> * Reword the Kconfig help message to make it clearer. (Conor)
> ---
>  arch/riscv/Kconfig       | 12 ++++++++++++
>  arch/riscv/net/bpf_jit.h | 18 ++++++++++++++++++
>  2 files changed, 30 insertions(+)
>

Reviewed-by: Andrew Jones <ajones@ventanamicro.com>