From patchwork Tue Jan 30 12:46:58 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pu Lehui X-Patchwork-Id: 13537529 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id ABB4AC48286 for ; Tue, 30 Jan 2024 12:46:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=VXwUWO5OpnkSBQNnkIoHtBLJfjBCg3pvyHmH1WnFmc0=; b=vGAWDlqjE2Puqr /pf1T2/LnMpLCJ3zFSbPiKwdfJBZif/B4Y7rS7NgzTqM0gJX7ewor7TVSSUmu2tk31R0bL55HHw2x 0k6Rx+QGbMH32ZgJ4vE6sEQ54xoxmWrR23CtNtPY1p1Aah7lT93JL7hKk6Abhr++MPA6qg2rCqwwU HeJsD7pz0WX3N90GMhMXlBPOrTx9fP8A3Pef0030abxhiGbwuQMGyZicVWrVlZ1u48RwaT8f/EFqg RUOW10JHg5VaTCwk4hu1xRsYnFim3d3yVTMdaMU+X2C8CcjTH9Pa8eoGhfNXhBIqBFPvQz97WxIvj EyIQIAZrWTgOPBXNB1Og==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rUnVP-0000000Gits-14cG; Tue, 30 Jan 2024 12:46:23 +0000 Received: from [45.249.212.51] (helo=dggsgout11.his.huawei.com) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1rUnVM-0000000Giqy-2XuN for linux-riscv@lists.infradead.org; Tue, 30 Jan 2024 12:46:22 +0000 Received: from mail.maildlp.com (unknown [172.19.163.216]) by dggsgout11.his.huawei.com (SkyGuard) with ESMTP id 4TPPzh4fkKz4f3k63 for ; Tue, 30 Jan 2024 20:46:08 +0800 (CST) Received: from mail02.huawei.com (unknown [10.116.40.112]) by mail.maildlp.com (Postfix) with ESMTP id 320AF1A01E9 for ; Tue, 30 Jan 2024 20:46:11 +0800 (CST) Received: from ultra.huawei.com (unknown [10.90.53.71]) by APP1 (Coremail) with SMTP id cCh0CgCXZg+S77hllrfLCQ--.28270S3; Tue, 30 Jan 2024 20:46:10 +0800 (CST) From: Pu Lehui To: bpf@vger.kernel.org, linux-riscv@lists.infradead.org, netdev@vger.kernel.org Cc: =?utf-8?b?QmrDtnJuIFTDtnBlbA==?= , Hou Tao , Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Martin KaFai Lau , Eduard Zingerman , Song Liu , Yonghong Song , John Fastabend , KP Singh , Stanislav Fomichev , Hao Luo , Jiri Olsa , Palmer Dabbelt , Luke Nelson , Pu Lehui , Pu Lehui Subject: [PATCH bpf-next 1/2] riscv, bpf: Enable inline bpf_kptr_xchg() for RV64 Date: Tue, 30 Jan 2024 12:46:58 +0000 Message-Id: <20240130124659.670321-2-pulehui@huaweicloud.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240130124659.670321-1-pulehui@huaweicloud.com> References: <20240130124659.670321-1-pulehui@huaweicloud.com> MIME-Version: 1.0 X-CM-TRANSID: cCh0CgCXZg+S77hllrfLCQ--.28270S3 X-Coremail-Antispam: 1UD129KBjvdXoWrKw4DuF43Cr4kKF1fZrWxXrb_yoWfJFb_C3 4xJa4kW3yrJa1xtF4UKF1rKry5Gwsa9FyDZrn3ZFyjy3Z09FsYqaykK3sakry7ur1FvrWD Xrn5XaySq3ya9jkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUb6AFF20E14v26rWj6s0DM7CY07I20VC2zVCF04k26cxKx2IYs7xG 6rWj6s0DM7CIcVAFz4kK6r1j6r18M28IrcIa0xkI8VA2jI8067AKxVWUGwA2048vs2IY02 0Ec7CjxVAFwI0_Xr0E3s1l8cAvFVAK0II2c7xJM28CjxkF64kEwVA0rcxSw2x7M28EF7xv wVC0I7IYx2IY67AKxVW5JVW7JwA2z4x0Y4vE2Ix0cI8IcVCY1x0267AKxVWxJVW8Jr1l84 ACjcxK6I8E87Iv67AKxVW0oVCq3wA2z4x0Y4vEx4A2jsIEc7CjxVAFwI0_GcCE3s1le2I2 62IYc4CY6c8Ij28IcVAaY2xG8wAqx4xG64xvF2IEw4CE5I8CrVC2j2WlYx0E2Ix0cI8IcV AFwI0_JrI_JrylYx0Ex4A2jsIE14v26r1j6r4UMcvjeVCFs4IE7xkEbVWUJVW8JwACjcxG 0xvY0x0EwIxGrwACjI8F5VA0II8E6IAqYI8I648v4I1lFIxGxcIEc7CjxVA2Y2ka0xkIwI 1l42xK82IYc2Ij64vIr41l4I8I3I0E4IkC6x0Yz7v_Jr0_Gr1lx2IqxVAqx4xG67AKxVWU JVWUGwC20s026x8GjcxK67AKxVWUGVWUWwC2zVAF1VAY17CE14v26r4a6rW5MIIYrxkI7V AKI48JMIIF0xvE2Ix0cI8IcVAFwI0_Jr0_JF4lIxAIcVC0I7IYx2IY6xkF7I0E14v26r4j 6F4UMIIF0xvE42xK8VAvwI8IcIk0rVWUJVWUCwCI42IY6I8E87Iv67AKxVW8JVWxJwCI42 IY6I8E87Iv6xkF7I0E14v26r4UJVWxJrUvcSsGvfC2KfnxnUUI43ZEXa7VU1sXo7UUUUU= = X-CM-SenderInfo: psxovxtxl6x35dzhxuhorxvhhfrp/ X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240130_044620_883399_4B574FAC X-CRM114-Status: UNSURE ( 6.20 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org From: Pu Lehui RV64 JIT supports 64-bit BPF_XCHG atomic instructions. At the same time, the underlying implementation of xchg() and atomic64_xchg() in RV64 both are raw_xchg() that supported 64-bit. Therefore inline bpf_kptr_xchg() will have equivalent semantics. Let's inline it for better performance. Signed-off-by: Pu Lehui --- arch/riscv/net/bpf_jit_comp64.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/riscv/net/bpf_jit_comp64.c b/arch/riscv/net/bpf_jit_comp64.c index fda6b4f6a4c1..869e4282a2c4 100644 --- a/arch/riscv/net/bpf_jit_comp64.c +++ b/arch/riscv/net/bpf_jit_comp64.c @@ -1806,3 +1806,8 @@ bool bpf_jit_supports_kfunc_call(void) { return true; } + +bool bpf_jit_supports_ptr_xchg(void) +{ + return true; +}