From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pf1-f175.google.com (mail-pf1-f175.google.com [209.85.210.175]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AD12639FCC8 for ; Fri, 4 Sep 2026 19:51:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.175 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788551506; cv=none; b=CvEI9ZzBItP5tYtkw/1EqNU38ImzVNn7E0OOxAsjhBBZ9xRQfbyUh80p3DJSkd2wRTUV7Tk/afYZDaJmv6FntCHsEWnZXASxgNycxC2FgGgcaKFC3a+gbteRLEUaTkogtsptilVu2cd5iJSsktg75zALrj8u2qSgvI2J1lNzHnk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788551506; c=relaxed/simple; bh=N6DaW9Fp0YhcldyMvN0Ck3Ujv+hbxY6t0zjeP3rCe0k=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=gDyN9nowdCf3qgyMkLhALStboV2ozoZ0CjAYtTRvlIJEIs36eBUUMTv+QguPUXsKlzhmi4QA4RApvJwseOU+ZWQ9Lu0Y2Xv85OYSMR0KkUBzqLsKZdaAygShoJ330NYCWlnuGeNo1tYRBCDVav5WsRnbbU/00moxRE/4LvcUJx8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=USxSswep; arc=none smtp.client-ip=209.85.210.175 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="USxSswep" Received: by mail-pf1-f175.google.com with SMTP id d2e1a72fcca58-84e84a6c4bfso1393162b3a.1 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=vger.kernel.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=sQVUWoA7x45iUD9G/BjlX2mTaB7Twjm1Fp1QyKVPw8I=; b=USxSswepifRtwFepO5whC0ZBBBFpwiRKBjsXb51zcbI/5J7VOy0yZ4Hk0orohUMWkA 0rVAqIhcshm8DmnBSkFL49IdXSHWzAk2S4qAgYNnHKMAWN1wUX2Vetuqfz0tyDKQGjk3 xsrX2v/bsIP7apvCm6ECUgDrxbyLWiaY7bU5F+DSs13LAwm8ySvvFQWyqO8QL6N6ab3a u5cfvvqpSEGRC4fZQRXVnDjkosi4C/2n+00eshhS9Rxp52exK297jg00fhPo/SbnSpyG sm2kj2VV/MVMBl34AN2ceV6gKPO7knQEHBo7ueuZYLo14E5+nQhzWh5dzvJ1gD06IP18 gAOA== 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=sQVUWoA7x45iUD9G/BjlX2mTaB7Twjm1Fp1QyKVPw8I=; b=VkzsUR3iq/O3wsib12QmizV6JdpIBXVUF3nRWoAo3mo5iNwW9F0Tx+KTVF0Xpb33bx q5UKU0TBZtKIZ11Q1RPAtLW2vx61GUMvmuM1VgZ9KvdPxysvIHsuEjyNAIl4cwia5GBJ sNCMmhP/BrR/zBWuBe+XO8143+UmCFkRz5O1E+Tsgb22zCrUItKwWy4dRoQmdof2sfhr qvH64Qb1B/9eZAMe+NYmsaeq5fiVJm8xk4mdeNgyzY2F8MSnpz1hZS/yZB9PUMWqa653 iLeZM3ephwRraoSboa/a9/3zaRHQgYrvjVla77SjAzd+PxaUXXQEU+9mJw6b2aEggfYP OfiA== X-Gm-Message-State: AFuF++kALc4OmO6DPRt077VDHmE+V8aaWlsWSZBClOc+CGFm7aZyrgwg k8KSj62bvP9AAkRh/xbrIKxsdKzAhdr9ZEKvZnEdPN/7/dHatoXU4WdwVx3Kgg== X-Gm-Gg: AYBFou1WifzkJdcGxdwKJ3uZQKdyp/8UNSNKfwYNyJrGUDAudIsINeSi8xCLALrnDYA H0p0HGcA/wraPqjdqt66HXA5hk34MITCiUsbDkiVMIv46UyIv9RK936ShWF6qkGJRpZhVZkSn+F +sokMZuYwC8oExkMqeU7e7KX+OhklvPpUaW68jxxqaHnAEiOxkWLGeOwdZ9IjShwh7fyYD6JsKb vBLz7BiRgojx37/+C+wyLuBHoBMTRQklA/4y96AfSbs6IU1fmoZo/qw39txv+GmZ2qxcPas1wt1 n2fKWRK9lgfCzGrUwhaCzQy6VFka3EGz9k8PAEwSaYZC1M7vlx2jO5c2nwv2T0Y1r7K2WvAjoW7 nulsCY+u6KO6f8YZ1irlQzb6zXlFknfkncm+sm24ka/j6ZnE275sRxoRx6txu3jJIhJNdexbF76 wKSLDkJxfpmKM5wY/Ia5xVOtQC67bAciVxFMwAlCdWnyxuR76p+iZlJapR/EL6xigugY5phUYPb xN+otJN2yavsS5U7bmSRJOz/GU8oBnU0YJivjQijTaShs87qwbKX/XQr/6zJj1agwXS6A5shvZF /CfKhrIJL0ulcK4bW3gqBcBsGYnPnT0+npF7sOAeXhkDcHX2jgpnafnBaYE6I2C/4mhBfYWlZxM = X-Received: by 2002:a05:6a00:159a:b0:84a:65e8:137e with SMTP id d2e1a72fcca58-85ffe1099ecmr11049338b3a.17.1788551499491; Fri, 04 Sep 2026 12:51:39 -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.59.2026.09.04.12.51.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 04 Sep 2026 12:51:39 -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 4/7] bpf, powerpc64: Use resolved pointer for timed may_goto Date: Fri, 4 Sep 2026 19:51:29 +0000 Message-ID: <20260904195132.141068-5-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> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: 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: b55b6b9ad76c ("powerpc64/bpf: Add powerpc64 JIT 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/powerpc/net/bpf_timed_may_goto.S | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/arch/powerpc/net/bpf_timed_may_goto.S b/arch/powerpc/net/bpf_timed_may_goto.S index 84ecf6fa7f5d..d88825dd34fe 100644 --- a/arch/powerpc/net/bpf_timed_may_goto.S +++ b/arch/powerpc/net/bpf_timed_may_goto.S @@ -8,7 +8,7 @@ * arch_bpf_timed_may_goto() trampoline for powerpc64 * * Custom BPF convention (verifier/JIT): - * - input: stack offset in BPF_REG_AX (r12) + * - input: count and timestamp pointer in BPF_REG_AX (r12) * - output: updated count in BPF_REG_AX (r12) * * Call bpf_check_timed_may_goto(ptr) with normal powerpc64 ABI: @@ -32,10 +32,10 @@ SYM_FUNC_START(arch_bpf_timed_may_goto) std r8, 72(r1) /* - * r3 = BPF_REG_FP + BPF_REG_AX - * BPF_REG_FP is r31; BPF_REG_AX is r12 (stack offset in bytes). + * BPF_REG_AX (r12) contains the count and timestamp pointer; pass it as + * the first argument in r3. */ - add r3, r31, r12 + mr r3, r12 bl CFUNC(bpf_check_timed_may_goto) /* Put return value back into AX */ -- 2.43.0