[PATCH bpf-next v2 4/6] riscv, bpf: Add necessary Zbb instructions
Conor Dooley
conor at kernel.org
Tue Sep 19 00:38:53 PDT 2023
On Tue, Sep 19, 2023 at 11:58:37AM +0800, Pu Lehui wrote:
> From: Pu Lehui <pulehui at huawei.com>
>
> Add necessary Zbb instructions introduced by [0] to reduce code size and
> improve performance of RV64 JIT. Meanwhile, a runtime deteted helper is
> added to check whether the CPU supports Zbb instructions.
>
> Link: https://github.com/riscv/riscv-bitmanip/releases/download/1.0.0/bitmanip-1.0.0-38-g865e7a7.pdf [0]
> Suggested-by: Conor Dooley <conor at kernel.org>
Nah, you can drop this. It was just a review comment :)
> Signed-off-by: Pu Lehui <pulehui at huawei.com>
> ---
> arch/riscv/net/bpf_jit.h | 26 ++++++++++++++++++++++++++
> 1 file changed, 26 insertions(+)
>
> diff --git a/arch/riscv/net/bpf_jit.h b/arch/riscv/net/bpf_jit.h
> index 8e0ef4d08..4e24fb2bd 100644
> --- a/arch/riscv/net/bpf_jit.h
> +++ b/arch/riscv/net/bpf_jit.h
> @@ -18,6 +18,11 @@ static inline bool rvc_enabled(void)
> return IS_ENABLED(CONFIG_RISCV_ISA_C);
> }
>
> +static inline bool rvzbb_enabled(void)
> +{
> + return IS_ENABLED(CONFIG_RISCV_ISA_ZBB) && riscv_has_extension_likely(RISCV_ISA_EXT_ZBB);
This looks like it should work, thanks for changing it.
Cheers,
Conor.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 228 bytes
Desc: not available
URL: <http://lists.infradead.org/pipermail/linux-riscv/attachments/20230919/902e3fd6/attachment.sig>
More information about the linux-riscv
mailing list