From patchwork Tue Feb 21 14:06:56 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Pu Lehui X-Patchwork-Id: 13147978 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 51B8DC6379F for ; Tue, 21 Feb 2023 14:05:02 +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: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:In-Reply-To:References: List-Owner; bh=JWo4YComoROhB1NsADEeTEGvUijPX0l75rs14OqUwlM=; b=fSpAH2/GKZc6B8 b8+DbNKU8ezWfshojFlbOLGcbYVmNHl1Yy7MCBdOy1xq/cNjo/3MFCyNv2waQaOsk0G3rZwv6u56t ahWCiSvoGlC26aNsTL6ssNnUw3mgwVVWL1MjZ9nAQfiOhEzZu1eA+74v5FE8SMOFmYAxqtPil/pai n8ujsh20MFZ8E5ZLha9imyJcf0+S4LV3OZQrozChUqkjx1Bf6a18H33cCCetA44ebOAUvvxvrmHDq fpMtSG8a/jvyQ2oghtIIoih7sINToYcDYGp9p5lALIkU3BJGBEQe+ncoyIZO3vwUNDDDnXHj95QkH d/aRQMhaqCKrC3YXReMA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1pUTGI-008QOO-SV; Tue, 21 Feb 2023 14:04:54 +0000 Received: from dggsgout11.his.huawei.com ([45.249.212.51]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1pUTGC-008QJ2-PF for linux-riscv@lists.infradead.org; Tue, 21 Feb 2023 14:04:51 +0000 Received: from mail02.huawei.com (unknown [172.30.67.143]) by dggsgout11.his.huawei.com (SkyGuard) with ESMTP id 4PLgyP1Ql7z4f3y1F for ; Tue, 21 Feb 2023 22:04:29 +0800 (CST) Received: from localhost.localdomain (unknown [10.67.175.61]) by APP2 (Coremail) with SMTP id Syh0CgAnFuRtz_Rj_qv6Dw--.43008S2; Tue, 21 Feb 2023 22:04:31 +0800 (CST) From: Pu Lehui To: bpf@vger.kernel.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org Cc: =?utf-8?b?QmrDtnJuIFTDtnBlbA==?= , Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Martin KaFai Lau , Song Liu , Yonghong Song , John Fastabend , KP Singh , Stanislav Fomichev , Hao Luo , Jiri Olsa , Pu Lehui , Pu Lehui Subject: [PATCH bpf-next v3] riscv, bpf: Add kfunc support for RV64 Date: Tue, 21 Feb 2023 22:06:56 +0800 Message-Id: <20230221140656.3480496-1-pulehui@huaweicloud.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-CM-TRANSID: Syh0CgAnFuRtz_Rj_qv6Dw--.43008S2 X-Coremail-Antispam: 1UD129KBjvdXoWrury5AFWkAFy8Cr47Zr43Wrg_yoWDArg_Cr Z7ta4Iy398Ja1xJF4j9r4fZrykG393WFy8Xrn7uryjywn8WF1Ut34kKr97Gry7Zr1FyrWx Zrn3Ja92qw42qjkaLaAFLSUrUUUUUb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUbxkFF20E14v26ryj6rWUM7CY07I20VC2zVCF04k26cxKx2IYs7xG 6rWj6s0DM7CIcVAFz4kK6r1j6r18M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8w A2z4x0Y4vE2Ix0cI8IcVAFwI0_Ar0_tr1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Gr1j 6F4UJwA2z4x0Y4vEx4A2jsIE14v26rxl6s0DM28EF7xvwVC2z280aVCY1x0267AKxVW0oV Cq3wAS0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC0VAKzVAqx4xG6I80ewAv7VC0 I7IYx2IY67AKxVWUJVWUGwAv7VC2z280aVAFwI0_Jr0_Gr1lOx8S6xCaFVCjc4AY6r1j6r 4UM4x0Y48IcxkI7VAKI48JM4x0x7Aq67IIx4CEVc8vx2IErcIFxwACI402YVCY1x02628v n2kIc2xKxwCF04k20xvY0x0EwIxGrwCFx2IqxVCFs4IE7xkEbVWUJVW8JwC20s026c02F4 0E14v26r1j6r18MI8I3I0E7480Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_GFv_Wryl IxkGc2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVWUJVWUCwCI42IY6xIIjxv20xvEc7CjxV AFwI0_Gr0_Cr1lIxAIcVCF04k26cxKx2IYs7xG6rW3Jr0E3s1lIxAIcVC2z280aVAFwI0_ Jr0_Gr1lIxAIcVC2z280aVCY1x0267AKxVW8JVW8JrUvcSsGvfC2KfnxnUUI43ZEXa7VUb QVy7UUUUU== X-CM-SenderInfo: psxovxtxl6x35dzhxuhorxvhhfrp/ X-CFilter-Loop: Reflected X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230221_060449_115389_99B281CD X-CRM114-Status: UNSURE ( 8.12 ) 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 This patch adds kernel function call support for RV64. Since the offset from RV64 kernel and module functions to bpf programs is almost within the range of s32, the current infrastructure of RV64 is already sufficient for kfunc, so let's turn it on. Suggested-by: Björn Töpel Signed-off-by: Pu Lehui Acked-by: Björn Töpel --- v3: - rewrite commit message to make more sense. - Add Acked-by of Björn. 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 f5a668736c79..a9270366dc57 100644 --- a/arch/riscv/net/bpf_jit_comp64.c +++ b/arch/riscv/net/bpf_jit_comp64.c @@ -1751,3 +1751,8 @@ void bpf_jit_build_epilogue(struct rv_jit_context *ctx) { __build_epilogue(false, ctx); } + +bool bpf_jit_supports_kfunc_call(void) +{ + return true; +}