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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id B99BBEE6B45 for ; Fri, 6 Feb 2026 17:48:59 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 293A36B0089; Fri, 6 Feb 2026 12:48:59 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 26AD66B0093; Fri, 6 Feb 2026 12:48:59 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 14CEA6B0098; Fri, 6 Feb 2026 12:48:59 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0017.hostedemail.com [216.40.44.17]) by kanga.kvack.org (Postfix) with ESMTP id 046AD6B0089 for ; Fri, 6 Feb 2026 12:48:59 -0500 (EST) Received: from smtpin30.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay04.hostedemail.com (Postfix) with ESMTP id A9DCD1A0266 for ; Fri, 6 Feb 2026 17:48:58 +0000 (UTC) X-FDA: 84414767556.30.C1557FB Received: from mx0b-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) by imf11.hostedemail.com (Postfix) with ESMTP id 65E7340002 for ; Fri, 6 Feb 2026 17:48:56 +0000 (UTC) Authentication-Results: imf11.hostedemail.com; dkim=pass header.d=ibm.com header.s=pp1 header.b="lGw4/sX+"; dmarc=pass (policy=none) header.from=ibm.com; spf=pass (imf11.hostedemail.com: domain of jremus@linux.ibm.com designates 148.163.158.5 as permitted sender) smtp.mailfrom=jremus@linux.ibm.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1770400136; a=rsa-sha256; cv=none; b=hMvR+22wUcyBmzrfZe9NXvbpuPozinfQ7Dv5QEa3gv8f9gokkXyfEGD5zMy17zcY54D+Fw ZQywTlx9pt3iydKo+ZJoaqJ/0ywobcrKCxwh/1NrVvRsUxAVls+nN7KdM5VMf/Q+vUemy0 P08UdYCboISU9GY0EDe5Pi4C+hUAeVI= ARC-Authentication-Results: i=1; imf11.hostedemail.com; dkim=pass header.d=ibm.com header.s=pp1 header.b="lGw4/sX+"; dmarc=pass (policy=none) header.from=ibm.com; spf=pass (imf11.hostedemail.com: domain of jremus@linux.ibm.com designates 148.163.158.5 as permitted sender) smtp.mailfrom=jremus@linux.ibm.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1770400136; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=95V3b+ZVOs7mOp1p1nkpVTlGEQ1HKsAHiv7J4h8kLtM=; b=jfVz2dMbPpWGkxjou6PWaogbE20wwMcYT3IcTsVtzctd2TahzDIkTrlnR9k74r6h0pCzAN PucY1iJkbvJXanU2gEZrEAMot0ebuS6/qGtBXz2JwhHNX6Jix7p4msm1KX34fA7CktBfIr WDQ3pzSaMgqkUg0PkP0gFCdemxf9iGM= Received: from pps.filterd (m0360072.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 616CshDX023156; Fri, 6 Feb 2026 17:48:32 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=cc :content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=pp1; bh=95V3b+ ZVOs7mOp1p1nkpVTlGEQ1HKsAHiv7J4h8kLtM=; b=lGw4/sX+4FkoRgMhJJ6jlL v8YwLrK3myUbl+ahWma6HfLwuEQplmRh/7+BJyYf5FrwjUTRLnq6Jbt2oS8exR1W DkbxkavYeSRD8duqbowI58R9RYCU/u/LWbVCKST0pIy3lK/Bz6ykNY9PHTPOfeUr qdT7EX+sg/0OFloalatIZkFfrbjJFQF7oq9S29JSwENpE6QNT4E2Opk+NJZ6qKPx Y1C1hNa5vNegXOL+wxQ5pYu0Q2gRBnGLkMIeMdnc9Ysv3inhQaeTlu+H4UYpQDXC GfNdWQqWToCiK/biB7yfGtbemRRTcbAtjipNV7gDaygUClMUswnMMs16BGm5phSA == Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 4c19cwhgea-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 06 Feb 2026 17:48:31 +0000 (GMT) Received: from m0360072.ppops.net (m0360072.ppops.net [127.0.0.1]) by pps.reinject (8.18.1.12/8.18.0.8) with ESMTP id 616HmUbn029982; Fri, 6 Feb 2026 17:48:31 GMT Received: from ppma22.wdc07v.mail.ibm.com (5c.69.3da9.ip4.static.sl-reverse.com [169.61.105.92]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 4c19cwhge8-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 06 Feb 2026 17:48:30 +0000 (GMT) Received: from pps.filterd (ppma22.wdc07v.mail.ibm.com [127.0.0.1]) by ppma22.wdc07v.mail.ibm.com (8.18.1.2/8.18.1.2) with ESMTP id 616FwNNC009156; Fri, 6 Feb 2026 17:48:30 GMT Received: from smtprelay01.fra02v.mail.ibm.com ([9.218.2.227]) by ppma22.wdc07v.mail.ibm.com (PPS) with ESMTPS id 4c1veyf9ef-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 06 Feb 2026 17:48:29 +0000 Received: from smtpav04.fra02v.mail.ibm.com (smtpav04.fra02v.mail.ibm.com [10.20.54.103]) by smtprelay01.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 616HmPfR61669838 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 6 Feb 2026 17:48:25 GMT Received: from smtpav04.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id C9E722004B; Fri, 6 Feb 2026 17:48:25 +0000 (GMT) Received: from smtpav04.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 2D3D020043; Fri, 6 Feb 2026 17:48:24 +0000 (GMT) Received: from [9.111.139.102] (unknown [9.111.139.102]) by smtpav04.fra02v.mail.ibm.com (Postfix) with ESMTP; Fri, 6 Feb 2026 17:48:24 +0000 (GMT) Message-ID: <9a63ce89-84f0-4782-90bf-dfd7c8ec8c52@linux.ibm.com> Date: Fri, 6 Feb 2026 18:48:24 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v7 6/6] x86/vdso: Enable sframe generation in VDSO To: "H. Peter Anvin" , linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, bpf@vger.kernel.org, x86@kernel.org, linux-mm@kvack.org, Steven Rostedt , Josh Poimboeuf , Indu Bhagat Cc: Masami Hiramatsu , Mathieu Desnoyers , Peter Zijlstra , Ingo Molnar , Jiri Olsa , Arnaldo Carvalho de Melo , Namhyung Kim , Thomas Gleixner , Andrii Nakryiko , "Jose E. Marchesi" , Beau Belgrave , Linus Torvalds , Andrew Morton , Florian Weimer , Kees Cook , "Carlos O'Donell" , Sam James , Dylan Hatch , Borislav Petkov , Dave Hansen , David Hildenbrand , "Liam R. Howlett" , Lorenzo Stoakes , Michal Hocko , Mike Rapoport , Suren Baghdasaryan , Vlastimil Babka , Heiko Carstens , Vasily Gorbik , "Steven Rostedt (Google)" References: <20260203171958.1522030-1-jremus@linux.ibm.com> <20260203171958.1522030-7-jremus@linux.ibm.com> Content-Language: en-US From: Jens Remus Organization: IBM Deutschland Research & Development GmbH In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMjA2MDEyNyBTYWx0ZWRfX6fNUOzCorNIn VVQclkHCe0KuRSlmimy0Dz8UEyaxTtXtzi13UaXTIN/jrjaGqGGDBAgPZzI0NQ2swZxWdGg35WX ODbkjEmlA2/+sSatI0IhSbV3cBq/wc2gpJkvhflKKGutxmgtCXiEn1cVPU1Cblt26OlgyRiAv/f ZYUqxp5jacyRoLDLUWRtNMT9w/OpHor3UVy0uVtIL/aNT++HPFJa8hhomQf6Kgd6qxSEV8jou5Q z9A0NpYqJMzpfa8MZ4LzIOfGfOw0wOpHjDfdpVeY/f7dVnxmdwGv4HvPFgver1QK1i9ToSmWJcJ D8EfW9kTf0EKwvXtKT3q0HmaN61f57u1Z7z/x9c01pnlB6HsL7c4YAmQwceotDfiKBYRPfqOVlz wxB7Poz+CVfdckaCuVTaUtGnJLercniNAgiJd37nH9ggyKBkEEYMXov5fqRpvMvrGi9mob8sB5L CdOdSqRgP988gXMtLWw== X-Authority-Analysis: v=2.4 cv=UuRu9uwB c=1 sm=1 tr=0 ts=6986296f cx=c_pps a=5BHTudwdYE3Te8bg5FgnPg==:117 a=5BHTudwdYE3Te8bg5FgnPg==:17 a=IkcTkHD0fZMA:10 a=HzLeVaNsDn8A:10 a=VkNPw1HP01LnGYTKEx00:22 a=Mpw57Om8IfrbqaoTuvik:22 a=GgsMoib0sEa3-_RKJdDe:22 a=VnNF1IyMAAAA:8 a=44IIZKTLfzUdFyxfebkA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 X-Proofpoint-ORIG-GUID: kzzsbcp9iTOOGyukaKwzD6Q6COVYIuXo X-Proofpoint-GUID: RqJI4D_4LN6rKVzpRhjzBBV7lsDjQNw6 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-02-06_05,2026-02-05_03,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 bulkscore=0 adultscore=0 clxscore=1015 phishscore=0 malwarescore=0 lowpriorityscore=0 priorityscore=1501 impostorscore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2601150000 definitions=main-2602060127 X-Rspam-User: X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: 65E7340002 X-Stat-Signature: 98rzy8bu93s46z4aq9jwziij3eu1cpht X-HE-Tag: 1770400136-335963 X-HE-Meta: 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 2/4/2026 1:49 AM, H. Peter Anvin wrote: > On 2026-02-03 09:19, Jens Remus wrote: >> - >> +#if defined(__x86_64__) && defined(CONFIG_AS_SFRAME) My understanding is that you would like above changed to: #ifdef CONFIG_AS_SFRAME >> + .cfi_sections .eh_frame, .debug_frame, .sframe >> +#else >> .cfi_sections .eh_frame, .debug_frame >> +#endif >> > > It would be better to: > > #undef CONFIG_AS_SFRAME /* i386 doesn't support .sframe */ > > in fake_32bit_build.h. Due to (binutils 2.46 pre-release) GNU assembler supporting --gsframe-3, but only for x86-64 not for x86-32 (nor x32) CONFIG_AS_SFRAME is enabled even for my i386 cross build attempt. This then wrongly causes the .cfi_sections with .sframe to be selected (verified by adding an #error for testing). IIUC the .cfi_sections is there to have DWARF in both .eh_frame and .debug_frame. For .sframe it basically has the same effect as specifying the common assembler option --gsframe. Given the more specific option --gsframe-3 is explicitly specified I think it would be better to drop the changes to both dwarf2.h and fake_32bit_build.h and solely rely on --gsframe-3. Josh, Indu, do you agree? Thanks and rRegards, Jens -- Jens Remus Linux on Z Development (D3303) jremus@de.ibm.com / jremus@linux.ibm.com IBM Deutschland Research & Development GmbH; Vorsitzender des Aufsichtsrats: Wolfgang Wendt; Geschäftsführung: David Faller; Sitz der Gesellschaft: Ehningen; Registergericht: Amtsgericht Stuttgart, HRB 243294 IBM Data Privacy Statement: https://www.ibm.com/privacy/