From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pf1-f171.google.com (mail-pf1-f171.google.com [209.85.210.171]) (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 5572E78F3A for ; Mon, 10 Aug 2026 03:14:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.171 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786331689; cv=none; b=l1r38pXMuiTEqlrNiHefjDZZEfaK2qHgYJMgSMmazTRwqt/cEgJ4KzKugLG91G5xqwWeJ8rNy9NOpqIxD8eNfbJ1Gh+C6I43BVZ0tP35iBe8lYokHhJPwbi/scB19mWDiGFGGW2sl3JN/5Zc9JG2gH7pz6hC658wK6kwY2O4uuY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786331689; c=relaxed/simple; bh=rTCfLjKBjZSRh9MW4018I0tvQlS745tHSmb+T94F6iM=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=D+M6UG4+cksv/ADqZzpVU5lK8LeM13dA1Yo9XqjKFkvCgEFdk7CWAiYTgVU+loM6F6VDhjxAu+x7nFm52YqCHrXXQ3sIIUqdh4u1EXeeP00+QQqlrdci8kcaAu09Q4cOohjw9I6BkLwtekiY+SMkpUWu0h7GuvGtggw5/zHlATY= 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=ZxekemxJ; arc=none smtp.client-ip=209.85.210.171 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="ZxekemxJ" Received: by mail-pf1-f171.google.com with SMTP id d2e1a72fcca58-8486ac3f347so3797963b3a.1 for ; Sun, 09 Aug 2026 20:14:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1786331687; x=1786936487; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to:content-type; bh=P2U/NertvaThR7gO4CsqMLm8+RSS4kDRYQ7JnB/WYh4=; b=ZxekemxJklkqvYOnEQ+0p5c4iySudxwOnmjPDCBg11CPTlS16yNF++V9ofXDKgQmkb WhzTaH5eqU/+kRWsi4ur+uXmjAtM2QN52B+vNOivbT8jKUnImfZ6MjjZxvsiwigct/eI lC8/+wrZ7RQEh+/YN3wyrDOSzIlNI7hVCsdxnA/OJbmVJgepY+bkKA42G4J2K7qcBBpv gLTguhouk7fAcKDpK6kJVGHJieBmJompOdATtyVH46wAtn+4wagu8rciVU371OACMgUg gXBK3gWlNZ1KQD+O19bIB3LJr2sNBnbrmgQgSbtXkrDo5a34+yczpH+HHTQF4JXvKCLV Ha5Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1786331687; x=1786936487; h=content-transfer-encoding:mime-version: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=P2U/NertvaThR7gO4CsqMLm8+RSS4kDRYQ7JnB/WYh4=; b=L7TL2tDKIwaZS/rYce2NEn++Q3XnL30FqV9pVVzgGKoIAevsnKiqrRFqCjHfjfS6i6 46do2v7b75FT0kNOxH+oD/TeHRjQfdOoXjmYE420cwggOIki8n3VGDB6+GkRTrz0VEuW zqQoDD1UClz9J7V7w7/5jagifxeUCtJd/Vm8ITcOc9+zN/dUZp/qqPM3YY9KpJy36g1j f0V0jSJYZhTK+V5rWDHPMnjsv/9SKYCtGqAiDBJDaLc3q3G/PF/SE3u8dqAqt/LidFDX TAWWZuqj+AtVgDcdahPrpFJrZMdtAfFAgG0fZCqu2abROLzpG7H0qomHd1dxT2um5pM3 dScg== X-Forwarded-Encrypted: i=1; AHgh+RqlXBbWL8+SzIoN2KoCFjIFilKYETnxzg9/2xv7jH7jQSW9LJFcvM8h5GujfvZpKKInlx3mtgVSJDC/mLs=@vger.kernel.org X-Gm-Message-State: AOJu0YxKb1oIsY8fXawjFG68kt+hhrd9dzrLPyoPjeL26Ih37NX+Bew+ R2orBkTC1Qm1b2rl5j8kYw4uYAF3fcU3LVNvCF26R+iMKkVpviB7tfIv X-Gm-Gg: AR+sD13nJ5UGl7t4BLwxt5TIfKTgbnTq2b/Imc5XYK1mqHAtMGSlOKPXHI0Eq72BvEi tL5HQAlFOPDStJhwbjPh7Yz6NQRXn7sa4tCHN/iW+7JDDgwUSCSmADz/5bpKMHycYVyv3x1exmH cwMOT3ztGZYHN743Br4kEVfgN2pvUrN1tYiw9u8CwLfvCjsYWrG3TCAG+XyCDpiU0eoWMEtf2lR EOSqP9mWFIBTla1IKd1Tquy+4Mo2MG/RPcPfTn00SP4ArLIa4KYlwLU0EGmCCrU4NwmuqL/A8YO evVcrLze7K0pRa+lfueVAo3lU/EuORvdFvfPH2+pxoBZl6pObG+zHaJV1mrPnpuc9N86cvwF44Z iG2L3IQYxjNWTk0DlFiw4IXF6lLBXy/lJO25CMXkcAO2jI6qnen81+2ksDXDhhh2vDTORjebS0j ZuMvgYjLXIYa2jekSCS62c5H/u9HYtVPc7fvd4HVTjUo58BIHb17WDie8S+xei X-Received: by 2002:a05:6a21:9d48:b0:3a2:c9a1:2c26 with SMTP id adf61e73a8af0-3cbd38d82e2mr16885494637.7.1786331687533; Sun, 09 Aug 2026 20:14:47 -0700 (PDT) Received: from HP-Note-Host.. ([1.240.172.25]) by smtp.googlemail.com with ESMTPSA id 41be03b00d2f7-cbe8f37469esm3093843a12.23.2026.08.09.20.14.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 09 Aug 2026 20:14:47 -0700 (PDT) From: JaeJoon Jung To: bjorn.topel@gmail.com Cc: JaeJoon Jung , rgbi3307@nate.com, luke.r.nels@gmail.com, xi.wang@gmail.com, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH] riscv: net: bpf: add bpf_jit_supports_private_stack() Date: Mon, 10 Aug 2026 12:14:11 +0900 Message-ID: <20260810031418.95364-1-rgbi3307@gmail.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit The bpf_jit_supports_private_stack() function is defined with the __weak attribute in kernel/bpf/core.c as shown below, and returns false. include/linux/filter.h:1191:bool bpf_jit_supports_private_stack(void); kernel/bpf/core.c:3381:bool __weak bpf_jit_supports_private_stack(void) However, if this function is not defined in the corresponding architecture to return true, an error occurs when loading BPF as follows, and it is not loaded. $ cd tools/sched_ext $ make $ sudo ./build/bin/scx_simple libbpf: prog 'simple_dispatch': BPF program load failed: -EACCES libbpf: prog 'simple_dispatch': -- BEGIN PROG LOAD LOG -- Private stack not supported by jit arm64, powerpc, and x86 are defined as follows and return true. arch/arm64/net/bpf_jit_comp.c:2318:bool bpf_jit_supports_private_stack(void) arch/powerpc/net/bpf_jit_comp.c:530:bool bpf_jit_supports_private_stack(void) arch/x86/net/bpf_jit_comp.c:4111:bool bpf_jit_supports_private_stack(void) It seems that it should be defined in the same way in RISCV as well. Signed-off-by: JaeJoon Jung --- 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 8fe8969fb8a0..c3e8d91836f1 100644 --- a/arch/riscv/net/bpf_jit_comp64.c +++ b/arch/riscv/net/bpf_jit_comp64.c @@ -2171,3 +2171,8 @@ bool bpf_jit_supports_timed_may_goto(void) { return true; } + +bool bpf_jit_supports_private_stack(void) +{ + return true; +} -- 2.43.0