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 B5990EFD205 for ; Wed, 25 Feb 2026 08:08:51 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id E9CD36B00BD; Wed, 25 Feb 2026 03:08:50 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id E4A906B00BF; Wed, 25 Feb 2026 03:08:50 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id D4C926B00C0; Wed, 25 Feb 2026 03:08:50 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0014.hostedemail.com [216.40.44.14]) by kanga.kvack.org (Postfix) with ESMTP id BDCD06B00BD for ; Wed, 25 Feb 2026 03:08:50 -0500 (EST) Received: from smtpin22.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay09.hostedemail.com (Postfix) with ESMTP id 596218BDD2 for ; Wed, 25 Feb 2026 08:08:50 +0000 (UTC) X-FDA: 84482252820.22.78430B9 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by imf10.hostedemail.com (Postfix) with ESMTP id 79ADAC0004 for ; Wed, 25 Feb 2026 08:08:48 +0000 (UTC) Authentication-Results: imf10.hostedemail.com; dkim=none; dmarc=pass (policy=none) header.from=arm.com; spf=pass (imf10.hostedemail.com: domain of catalin.marinas@arm.com designates 217.140.110.172 as permitted sender) smtp.mailfrom=catalin.marinas@arm.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1772006928; a=rsa-sha256; cv=none; b=bOf+ZKQFJVURtvldsKlj9Fyh9bWh24WjUdJ5eGC0BEGInNbS0tQrJUM6flk+jxUAUq9/iL i3SPhEHRrrYoe4jWh2/nz9ETZ0bbCLse+25IhnPYaPv0zwafqhQHYZB6xRSmDOctqYwjRT DnuAX13N869d7TaLJSY1tdDNgdg4G8w= ARC-Authentication-Results: i=1; imf10.hostedemail.com; dkim=none; dmarc=pass (policy=none) header.from=arm.com; spf=pass (imf10.hostedemail.com: domain of catalin.marinas@arm.com designates 217.140.110.172 as permitted sender) smtp.mailfrom=catalin.marinas@arm.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1772006928; 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: in-reply-to:in-reply-to:references:references; bh=+hcGrB8f3LFV3yEVggniwkqkX4Jmt/LlWOAR6G9rqjM=; b=HMMzb3wCbvTSGoUQJE5R1V6Zn59pfHS+8yhwiupJerrF0pr9/d1NVMgVG7zCRvLozS9bA7 W9xG3+bN2pOuk1/40C0aG8uJyM2rZUkLT02sRZ1xuuVlxNdUa+KzoLGF6crMy6FChAsNo9 TQC0R8mAsSyj42ik8ab+4vh1SU76rS4= Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id E0A4A165C; Wed, 25 Feb 2026 00:08:40 -0800 (PST) Received: from arm.com (usa-sjc-mx-foss1.foss.arm.com [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id CDAFD3F59E; Wed, 25 Feb 2026 00:08:43 -0800 (PST) Date: Wed, 25 Feb 2026 08:08:41 +0000 From: Catalin Marinas To: Deepak Gupta Cc: Andrew Morton , David Hildenbrand , Mark Brown , Rick Edgecombe , Will Deacon , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , "H. Peter Anvin" , Kito Cheng , Jesse Huang , valentin.haudiquet@canonical.com, heinrich.schuchardt@canonical.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, linux-mm@kvack.org Subject: Re: [PATCH 0/5] mm: arch/shstk: Common shadow stack mapping helper and VM_NOHUGEPAGE Message-ID: References: <20260224175800.2500729-1-catalin.marinas@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Stat-Signature: ahbjaniafpjtuiy3ntxewana5837wg47 X-Rspam-User: X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: 79ADAC0004 X-HE-Tag: 1772006928-457005 X-HE-Meta: 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 RauBnxyS MV69eql/vlEz26PSAnBcWWk/5ZMv+WKcRFze8g8vwahqz4O1ffLY5RQsjuxD7wQ1vbzYQ51KXWOHnoE8G9ZsUWW7hQXBEmlsv0WiyRgTbF50Jd+H4yxch8BmONKJUVtQCnqRTPfmYT6bNFgrj2YspNI8lnz4LIKQm/9iYSnAOI2RBKv9gbTJTNLJTwtCvHU6E/Pek Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hi Deepak, On Tue, Feb 24, 2026 at 04:06:13PM -0800, Deepak Gupta wrote: > On Tue, Feb 24, 2026 at 05:57:52PM +0000, Catalin Marinas wrote: > > arm64, riscv and x86 all implement shadow stack support and use a > > similar pattern for mapping the user shadow stack (originally cloned > > from x86). Extract this common pattern into a shared helper - > > vm_mmap_shadow_stack(). [...] > FWIW, I applied your patches on v7.0-rc1 and risc-v cfi kselftest passes [...] > So you can tag tested by for risc-v. That's great, thanks! -- Catalin