[PATCH v3] riscv, bpf: Optimize zextw insn with Zba extension

[Andrew Jones]

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 at 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 at ventanamicro.com>