From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D38DEC10F1B for ; Sat, 24 Dec 2022 06:23:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231250AbiLXGXJ (ORCPT ); Sat, 24 Dec 2022 01:23:09 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38548 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229503AbiLXGXG (ORCPT ); Sat, 24 Dec 2022 01:23:06 -0500 Received: from dggsgout11.his.huawei.com (dggsgout11.his.huawei.com [45.249.212.51]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D5958164BC; Fri, 23 Dec 2022 22:23:04 -0800 (PST) Received: from mail02.huawei.com (unknown [172.30.67.169]) by dggsgout11.his.huawei.com (SkyGuard) with ESMTP id 4NfDW62ZMgz4f3k6G; Sat, 24 Dec 2022 14:22:58 +0800 (CST) Received: from [10.67.109.184] (unknown [10.67.109.184]) by APP2 (Coremail) with SMTP id Syh0CgC3XevBmqZjip+oAQ--.41973S2; Sat, 24 Dec 2022 14:22:59 +0800 (CST) Message-ID: Date: Sat, 24 Dec 2022 14:22:57 +0800 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:102.0) Gecko/20100101 Thunderbird/102.3.0 Subject: Re: [RFC PATCH RESEND bpf-next 0/4] Support bpf trampoline for RV64 Content-Language: en-US To: =?UTF-8?B?QmrDtnJuIFTDtnBlbA==?= , bpf@vger.kernel.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org Cc: Luke Nelson , Xi Wang , Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Martin KaFai Lau , Song Liu , Yonghong Song , John Fastabend , KP Singh , Stanislav Fomichev , Hao Luo , Jiri Olsa , Paul Walmsley , Palmer Dabbelt , Albert Ou , Pu Lehui References: <20221220021319.1655871-1-pulehui@huaweicloud.com> <87ili3a8zy.fsf@all.your.base.are.belong.to.us> From: Pu Lehui In-Reply-To: <87ili3a8zy.fsf@all.your.base.are.belong.to.us> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-CM-TRANSID: Syh0CgC3XevBmqZjip+oAQ--.41973S2 X-Coremail-Antispam: 1UD129KBjvdXoW7XrW3Jr4fCF1kGFyUZw1rCrg_yoWfZrgEkr ZxtrySvr45ta1Dtw1Ygw43urZxXr40qFyvyrWUXFZ2k395ZF1kXFn8u39xArWfZ3ySqFnx tF98AFyxAasFvjkaLaAFLSUrUUUUUb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUbIxYFVCjjxCrM7AC8VAFwI0_Xr0_Wr1l1xkIjI8I6I8E6xAIw20E Y4v20xvaj40_Wr0E3s1l1IIY67AEw4v_Jr0_Jr4l8cAvFVAK0II2c7xJM28CjxkF64kEwV A0rcxSw2x7M28EF7xvwVC0I7IYx2IY67AKxVW7JVWDJwA2z4x0Y4vE2Ix0cI8IcVCY1x02 67AKxVW8Jr0_Cr1UM28EF7xvwVC2z280aVAFwI0_GcCE3s1l84ACjcxK6I8E87Iv6xkF7I 0E14v26rxl6s0DM2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40E x7xfMcIj6xIIjxv20xvE14v26r1j6r18McIj6I8E87Iv67AKxVWUJVW8JwAm72CE4IkC6x 0Yz7v_Jr0_Gr1lF7xvr2IY64vIr41lFIxGxcIEc7CjxVA2Y2ka0xkIwI1lc7I2V7IY0VAS 07AlzVAYIcxG8wCF04k20xvY0x0EwIxGrwCFx2IqxVCFs4IE7xkEbVWUJVW8JwC20s026c 02F40E14v26r1j6r18MI8I3I0E7480Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_GFv_ WrylIxkGc2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVWUJVWUCwCI42IY6xIIjxv20xvEc7 CjxVAFwI0_Gr0_Cr1lIxAIcVCF04k26cxKx2IYs7xG6rW3Jr0E3s1lIxAIcVC2z280aVAF wI0_Jr0_Gr1lIxAIcVC2z280aVCY1x0267AKxVW8JVW8JrUvcSsGvfC2KfnxnUUI43ZEXa 7IU13rcDUUUUU== X-CM-SenderInfo: psxovxtxl6x35dzhxuhorxvhhfrp/ X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2022/12/22 21:00, Björn Töpel wrote: > Pu Lehui writes: > >> BPF trampoline is the critical infrastructure of the bpf >> subsystem, acting as a mediator between kernel functions >> and BPF programs. Numerous important features, such as >> using ebpf program for zero overhead kernel introspection, >> rely on this key component. We can't wait to support bpf >> trampoline on RV64. The implementation of bpf trampoline >> was closely to x86 and arm64 for future development. > > Thank you for working on this! BPF trampoline is the "missing piece" > from getting proper kfunc support. > > Unfortunately, I wont be able to do a proper review until next week. > Take your time, it might take several rounds of optimization. Yep, riscv bpf will look more complete when bpf trampoline and kfunc are supported. Anyway, have a nice christmas holidays.😄 Lehui > > Happy holidays, > Björn