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 lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (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 06E7AC624DB for ; Sat, 5 Sep 2026 06:18:28 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [127.0.0.1]) by lists.ozlabs.org (Postfix) with ESMTP id 4hcNSL4N9tz2yyd; Sat, 05 Sep 2026 16:18:26 +1000 (AEST) Authentication-Results: lists.ozlabs.org; arc=none smtp.remote-ip="2607:f8b0:4864:20::42f" ARC-Seal: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1788551503; cv=none; b=QtoepCXe/O1mjM13uj7FI4vFzfPmkbRR8DLc2Bey0vsXDNJH269/4+2JzhZAmeZN4McXgDUwFXpsTJq6+9f9yxjh+jI/g8EVB3gVzyD4VCz5IB7JpXpvM1xaELVlzDWLxNb+drz2Z/TGUTNHKA/tOt3mSIvtCBj3VTdYEJhr0dvJLs24xs0IsqD28nfFFksMlteE58U/sVmPqLqwudaoaKfEI4WNDGsZnJpnONRckHPKExU1Vtsalg1L9FZLFrcHMzaZp+U0JC3IPBJWcmF5xX4XEI9WoifgxxN5zQPlEAfyDvfz64OSb+xZ5mmBPGYhzQQSo9K7qCcqAJFs96+ZBA== ARC-Message-Signature: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1788551503; c=relaxed/relaxed; bh=JhQhsQ4UfwQumqLXBrbDqGkg/NZUYL46Pvxy1S1ZxCg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=X/lXssEX+rvRqEg+qMfCExh1tFXJAO3Vrv8CEuH6OdunqtPZgOcFfM2z7iSAHPvVahL88VUzi6l6ae2Lp0GyKSdx1NGswubKVzXg7kPE4nbPf3XevVrlHN04XmLRiaaeGq2kNH9e+mjyqo9Z0XHZoRZfiYb5kdhNDUsc6oggznyxhAecD5e+PI5XrzGu/jBQC1LTcB2jtIe6tZtlj2PKVKajMV4XkAoTdErrGSxi0t/92dK/7AtUcvUryCCT1eFQz0esOu5H4LKXGUDlDnXczHxT6STPGxgTMj17Gk2Rtxng5xFIsqe73nzY0iq4xtV0QzQb7OWhOfGu+0JqjmjE8w== ARC-Authentication-Results: i=1; lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=gmail.com; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256 header.s=20251104 header.b=ILeTcTCi; dkim-atps=neutral; spf=pass (client-ip=2607:f8b0:4864:20::42f; helo=mail-pf1-x42f.google.com; envelope-from=sidchintamaneni@gmail.com; receiver=lists.ozlabs.org) smtp.mailfrom=gmail.com Authentication-Results: lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256 header.s=20251104 header.b=ILeTcTCi; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=gmail.com (client-ip=2607:f8b0:4864:20::42f; helo=mail-pf1-x42f.google.com; envelope-from=sidchintamaneni@gmail.com; receiver=lists.ozlabs.org) Received: from mail-pf1-x42f.google.com (mail-pf1-x42f.google.com [IPv6:2607:f8b0:4864:20::42f]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange x25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4hc6YB46zVz2yrW for ; Sat, 05 Sep 2026 05:51:42 +1000 (AEST) Received: by mail-pf1-x42f.google.com with SMTP id d2e1a72fcca58-85590c5aeabso1020620b3a.3 for ; Fri, 04 Sep 2026 12:51:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1788551500; x=1789156300; darn=lists.ozlabs.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to:content-type; bh=JhQhsQ4UfwQumqLXBrbDqGkg/NZUYL46Pvxy1S1ZxCg=; b=ILeTcTCixZLLFihUELkyA0hjnYHfYjNd5t8W+ZR02IOYTguHF+aDFK4kVzysYWnn1e mGwoEoL/ogmjpxLAitIvcrxBbL1+/HMTOAp9WXxe3ulraiw+21xQ8s+QHhPDm0QNb1YG AARiy7BUh+Iixi0M2GUTBh5VLIdzxi8fa4sBcNKuYc5zrXL7+gOB/V3yO7kSVjXqJGQY VxXDCDVxhkR/lN1YAdP5CNj28ffjRK0m9iKYJ1WU6eAOme3HO/QxRNp0+Q9z+ZViyHMy Pa4FmvJzXXs7H1m6kNPv6MpLOyFCotsctdI575SdfnKw6YFVXX9KHOLLr7f6k+DoHCeY S+qA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1788551500; x=1789156300; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to:content-type; bh=JhQhsQ4UfwQumqLXBrbDqGkg/NZUYL46Pvxy1S1ZxCg=; b=MyoFw5VSWAfX84OxVXZlbuI+1TuzYX+uQTOz9cuDFCDh4o+HGlSdAOItMJZ+7FrR8d RN5lnHSAlVABsswdR2apSfXv+pAsY9qEj7nKZ6A5zz1xdCev6ew7UD+IDn90vbrv+W5G AhyU7vNluH90uQH3/bFIFm7lwChFHjqulqwStmgLMzvWmaX9eZRtmiTeOM2u77VzlByU hYlQxY/x3tqEhMwrkxv9FwbCCEcHhgqraFlEUAYgBy+ISWXj8b/HRbwO2W/ebM5PKyix G4G/aKZcdK1dcagvXQwmArHieV23djOWSbuhDcRO5QKYLvjcQxp1/1jXFWSA/rQo7y+Y sXzA== X-Forwarded-Encrypted: i=1; AKwUvBymfDdieXwwHwl0x6of6fAEjGcmw4dc5011tXflvomU1Zms6+W+2lNLb3n/B4rDTv5JyEBcH8wpXgQh1To=@lists.ozlabs.org X-Gm-Message-State: AFuF++lNBfHCAcaOO1GlUMj1RJd9lxYEAcr4Mnwm+c7XAnvBGZEicVeo CPfL4OS9GiRRbiLF3pr2W72UskcaXoU0Y/O/2YZ4HVYT1kYy/ouUkNFx X-Gm-Gg: AYBFou08OW8L+3fQbDNeurHDgav/ILCYO0S+HI+Kmbg8oOl9Vn5A67zvUYr+H14rmra x6a1GYeWzxBUBiYhSGUMvh6nDVQ2LslvQ9/iZHPynJSoiOqkUsEgVwSuvyhKVIe6VuyhqxrLmxn RcEO62g58w7C5f0LWYlGN+vP+yWEuM8mWV2hNINSoEvUPgw/T/0ZHOavBi5dGzCFLVcbyQNWsdi 60oPmPXyyEODF+3M21G4Iq8hknxSnp54k5s+P/ffvyU5M48PUrPwLyJHxCFHAvHq2ShJrTsGZ3f /lN6zCWu+rB5eGJElQzQ/2wGcHkYK7kgZTCrmdDKIC105/oanDvN+zRWuGvjM7aZ0RW8ri6HSyV V6LRHU2+nDhOv474DTwlQwz+UQZ6Ay18CiqHd5XeQKYuqZs56DNaX75rXIVDhY+m73IRHvlsi5R 3jICbiTd+BiJRAQlMfr8KMuQFuH8aptoJLgVpHTYRuZUJNShwa0h40TkLdwfn6eZMKguPYTjmTX HXBF7xbQK6dq1q0Fc74zPtSpon5R4haXsAbd+Xr1035v7P17YQFKHQzJcTCzv0ou/+I8yaVD0TC NdROIaXbOVwlBEdHVLJYJcyd8tYX3rHIdWAFn/boVoxmjrMOaJN1f3+0Yi1MlAkIadZ08Vdfu3I = X-Received: by 2002:a05:6a00:9286:b0:84f:77cc:63cd with SMTP id d2e1a72fcca58-8616a06be4amr11190015b3a.17.1788551500394; Fri, 04 Sep 2026 12:51:40 -0700 (PDT) Received: from sid-dev-env.cgrhrlrrq2nuffriizdlnb1x4b.xx.internal.cloudapp.net ([4.155.54.158]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-8615404876fsm1497684b3a.59.2026.09.04.12.51.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 04 Sep 2026 12:51:40 -0700 (PDT) From: Siddharth Chintamaneni To: bpf@vger.kernel.org Cc: Siddharth Chintamaneni , Jeremy Jean , Alexei Starovoitov , Daniel Borkmann , John Fastabend , Andrii Nakryiko , Eduard Zingerman , Kumar Kartikeya Dwivedi , Martin KaFai Lau , Song Liu , Yonghong Song , Jiri Olsa , Emil Tsalapatis , Ihor Solodrai , Anton Protopopov , Puranjay Mohan , linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-riscv@lists.infradead.org, rlmenge@gmail.com, hargar@linux.microsoft.com, apais@microsoft.com Subject: [PATCH bpf-next v1 5/7] bpf, riscv: Use resolved pointer for timed may_goto Date: Fri, 4 Sep 2026 19:51:30 +0000 Message-ID: <20260904195132.141068-6-sidchintamaneni@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260904195132.141068-1-sidchintamaneni@gmail.com> References: <20260904195132.141068-1-sidchintamaneni@gmail.com> X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit The timed may_goto fixup now passes the resolved counter pointer through BPF_REG_AX instead of a stack offset. Copy the pointer directly into the first argument register rather than adding it to the BPF frame pointer again. Fixes: 6ef8ff20c30b ("bpf, riscv: Add support for timed may_goto") Reported-by: Jeremy Jean Link: https://lore.kernel.org/all/20260824213158.3755932-2-Jeremy.Jean@oss.cyber.gouv.fr/ Assisted-by: Copilot:gpt-5.6-sol Signed-off-by: Siddharth Chintamaneni --- arch/riscv/net/bpf_timed_may_goto.S | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) diff --git a/arch/riscv/net/bpf_timed_may_goto.S b/arch/riscv/net/bpf_timed_may_goto.S index 02c637d87420..8c03e272e0bf 100644 --- a/arch/riscv/net/bpf_timed_may_goto.S +++ b/arch/riscv/net/bpf_timed_may_goto.S @@ -6,12 +6,11 @@ /* * Trampoline for the BPF timed may_goto loop bound. Custom calling convention: - * - input: stack offset in BPF_REG_AX (t0) + * - input: count and timestamp pointer in BPF_REG_AX (t0) * - output: updated count in BPF_REG_AX (t0) * - * Calls bpf_check_timed_may_goto(ptr) with the standard RISC-V ABI, where - * ptr = BPF_REG_FP (s5) + BPF_REG_AX (t0). BPF R0-R5 (a5, a0-a4) are saved - * across the call; BPF_REG_FP (s5) is callee-saved and needs no saving. + * Calls bpf_check_timed_may_goto(ptr) with the standard RISC-V ABI. + * BPF R0-R5 (a5, a0-a4) are saved across the call. */ SYM_FUNC_START(arch_bpf_timed_may_goto) @@ -28,7 +27,11 @@ SYM_FUNC_START(arch_bpf_timed_may_goto) REG_S a3, 1*SZREG(sp) REG_S a4, 0*SZREG(sp) - add a0, t0, s5 + /* + * BPF_REG_AX (t0) contains the count and timestamp pointer; pass it as + * the first argument in a0. + */ + mv a0, t0 call bpf_check_timed_may_goto mv t0, a0 -- 2.43.0