From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pg1-f173.google.com (mail-pg1-f173.google.com [209.85.215.173]) (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 D5B6E482EF; Mon, 16 Sep 2024 09:24:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.215.173 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726478664; cv=none; b=JzxWoQICmpAEAvsnkYCfitiCVAN7F38593bxQceG6OvUErel/T3vl7MXbDGJlC6FzS3acYVRPnxD3vYGizQT/mgDbBTPxyyf3WDMRk9oHKk7wk/CO+SvvCNt4wMEch7XKVo2hjf7WcRLtnlmXw8eo+A/e7NNEfbl0UzcH9jvtGc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726478664; c=relaxed/simple; bh=4POVzH0YYTw1lupHhplEjHAuU050H42ApyZQzNTJASA=; h=Message-ID:Subject:From:To:Cc:Date:In-Reply-To:References: Content-Type:MIME-Version; b=m91Q2yZe0kKM9CJQ0GzsTP/wWj3qSyQKJdfTozxwLZtDhJY/ILX2BVoYO8cvAii0zHySD/GCsFyCuKuzcs6LqCPV+ReEzUC9L9aTJo0cU4++bJOZNbRhkI6pteJFBvbJ3tBWn8jTdV8Joo6wf4GMIXHqtpwB+ZdCcWK9xqzxAwo= 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=FgFLL0/5; arc=none smtp.client-ip=209.85.215.173 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="FgFLL0/5" Received: by mail-pg1-f173.google.com with SMTP id 41be03b00d2f7-7db0fb03df5so3207256a12.3; Mon, 16 Sep 2024 02:24:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1726478662; x=1727083462; darn=vger.kernel.org; h=mime-version:user-agent:content-transfer-encoding:references :in-reply-to:date:cc:to:from:subject:message-id:from:to:cc:subject :date:message-id:reply-to; bh=gI5PuM1qflBYGtHvR2miDMQUDtV+K21AorIVDpm/Y/s=; b=FgFLL0/5uankMrnrAAloMPPrcJ4+sFt3iXmocKg+8rTlhmTTns1ihyHP41lmeV4aee Luk9AIBykBBEvjmc9Nd3gasZmzeqi6qFDGGa2tvg+tMOu0LmqJE+Zy0ehmELQOzFYFrN Dzy4jAq4whgX/BLyKWSRguMLwo2oJZqRBfRM1xHfBFKpNQM57SB+vLTzxPfW1ci5jyLV PNUZmfqMzpn4eiX4bH0PdhHuRtjdXHjb5OhAvYnkZqq5A7kUPKxTKGvTH0RevYScRUbN xL1JQxZV6718iccY38yR7sQAdKffOyOv/STP0GVVTcZIDYjUESH/qTdmUOxDF9EHl9lh YMfQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1726478662; x=1727083462; h=mime-version:user-agent:content-transfer-encoding:references :in-reply-to:date:cc:to:from:subject:message-id:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=gI5PuM1qflBYGtHvR2miDMQUDtV+K21AorIVDpm/Y/s=; b=ImTybuL92y6fwN75rKIx8nPARLArqpLOolQbaSoGUr8O2+/STv5+ywrcydRQEJ0EgL y7f1IVzvNl/H5XAK2I8UIO1a2AGQEhMJi0rE+uquBLPL4NWw9OvaR7VIKddnvwRH/Suj ZnbouLRQuj714zvUd5YQ2/v21P/fy3PUjjh6NSChBCi2l73ifo2+aJdS2meJgccbEPg5 Wk6t4Nj/3H6BSkgGKVPVRAlxvQpn0oP2mYPqfsgMQ9E1g63ZpuJoF3PlVCAv/nH/r8o/ /ZHFnE33lwX8i3gXHgxvOd1f/5eac4SGLbgOzJD/uS+blScM7NlNnvCgupWVYQlaTF4o kvkA== X-Gm-Message-State: AOJu0Yx5OiVTmxY3UBf0QEGD8VmjuyzkSC80qk+V/oho6uGWMTpKL1Mm m0j5HNluT95VsOKgOdyi1MmPghtazsQU0lvmhc5kWOzNBgFVh03/rYZs4Q== X-Google-Smtp-Source: AGHT+IFoMFfNEk+1XdtwZUfeRKoL0DgDCHccBq3J8i5gOC6vTN3Kx/YwnDGMKlFEeYigYcPy3fpsaw== X-Received: by 2002:a17:90b:1043:b0:2d8:aa9c:e386 with SMTP id 98e67ed59e1d1-2db9ff90b77mr19343075a91.14.1726478661943; Mon, 16 Sep 2024 02:24:21 -0700 (PDT) Received: from [192.168.0.235] ([38.34.87.7]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-2dbb9d5c9c6sm6801161a91.46.2024.09.16.02.24.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 16 Sep 2024 02:24:21 -0700 (PDT) Message-ID: Subject: Re: [PATCH dwarves v1] pahole: generate "bpf_fastcall" decl tags for eligible kfuncs From: Eduard Zingerman To: dwarves@vger.kernel.org, arnaldo.melo@gmail.com Cc: bpf@vger.kernel.org, kernel-team@fb.com, ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org, yonghong.song@linux.dev, martin.lau@linux.dev Date: Mon, 16 Sep 2024 02:24:16 -0700 In-Reply-To: <20240916091921.2929615-1-eddyz87@gmail.com> References: <20240916091921.2929615-1-eddyz87@gmail.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.52.4 (3.52.4-1.fc40) Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 On Mon, 2024-09-16 at 02:19 -0700, Eduard Zingerman wrote: > For kfuncs marked with KF_FASTCALL flag generate the following pair of > decl tags: >=20 > $ bpftool btf dump file vmlinux > ... > [A] FUNC 'bpf_rdonly_cast' type_id=3D... > ... > [B] DECL_TAG 'bpf_kfunc' type_id=3DA component_idx=3D-1 > [C] DECL_TAG 'bpf_fastcall' type_id=3DA component_idx=3D-1 Note, corresponding kernel changes are submitted here: https://lore.kernel.org/bpf/20240916091712.2929279-1-eddyz87@gmail.com/ [...]