From patchwork Mon Feb 3 10:18:26 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kevin Brodsky X-Patchwork-Id: 13957202 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E4BC8C02193 for ; Mon, 3 Feb 2025 10:24:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=DAvN/ymhOC9RH1764Pqdo1P8xtkdW4aJF6g43VRuQIg=; b=rkeQ0hf+5KyCUKoMNwzZqi4cqR Tk/58geZlHBQRpmeK/ljHzWODbJzNJYY/IfH3gUZjWwpWhiCxjDMPuYeuDuHAAYr2DRDDsJwhKb66 cfnBmNtEdP6RXlQJ//LkRtjAM+HgAMjhChi2IWUGOxEO9YksE1XegkuiUHXYzHAH3717C0faYyIpq XUM3Ylt8pXtCqji/3zNgarm4yG+8tu4QmVg1uXfZ7dHiQt2ReCIXmnVVb52q6nfjQX7EVINqn6I9t FXnl+NkqWgGFPLjSneAFOB73V4izpjKHVkGjtzjF/v9z3LjTqqUUQSw5/rReafldbYWI3dRlxF06t uEl4PCHA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tetcL-0000000F6qr-0U3k; Mon, 03 Feb 2025 10:23:49 +0000 Received: from desiato.infradead.org ([2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tetYX-0000000F5yJ-3WxU for linux-arm-kernel@bombadil.infradead.org; Mon, 03 Feb 2025 10:19:53 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Content-Transfer-Encoding:MIME-Version :References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=DAvN/ymhOC9RH1764Pqdo1P8xtkdW4aJF6g43VRuQIg=; b=QqEdGodKyzFejanKvg8k2e3FjA aB+GNB6K3iNoYtohLFQT3H0CZax/d1+XifBg9uYgUmErF9huVuiX+lwiQxy9/fwdFwBQaLgevoGWc Ndz/mtItsFj2cnbVfoBKlr4hc1BuPDQA0x0WDUGXsyqewbp+qiwYGeEWl2AaQ+RRA75l0Ovni7+fa cjumRVSHY7krSoxVVv+DJ37rQyN3yD7MgRWjYmBxPFGL33g/CBatW8r1BXryKIgMyx+XPggid7NW0 hqzx11zZkXhPU1DOuLl9sG/fLxiatAnbP4vniVSWQL+2WjGS2KiSEQQoPkLHBa80v5AO8EKsJx5uJ oGFL4uMA==; Received: from foss.arm.com ([217.140.110.172]) by desiato.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tetYU-0000000G3QV-2oJP for linux-arm-kernel@lists.infradead.org; Mon, 03 Feb 2025 10:19:52 +0000 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 249791682; Mon, 3 Feb 2025 02:20:14 -0800 (PST) Received: from e123572-lin.arm.com (e123572-lin.cambridge.arm.com [10.1.194.54]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 3298A3F63F; Mon, 3 Feb 2025 02:19:46 -0800 (PST) From: Kevin Brodsky To: linux-hardening@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Kevin Brodsky , Andrew Morton , Mark Brown , Catalin Marinas , Dave Hansen , Jann Horn , Jeff Xu , Joey Gouly , Kees Cook , Linus Walleij , Andy Lutomirski , Marc Zyngier , Peter Zijlstra , Pierre Langlois , Quentin Perret , "Mike Rapoport (IBM)" , Ryan Roberts , Thomas Gleixner , Will Deacon , Matthew Wilcox , Qi Zheng , linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, x86@kernel.org Subject: [RFC PATCH v3 02/15] set_memory: Introduce set_memory_pkey() stub Date: Mon, 3 Feb 2025 10:18:26 +0000 Message-ID: <20250203101839.1223008-3-kevin.brodsky@arm.com> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20250203101839.1223008-1-kevin.brodsky@arm.com> References: <20250203101839.1223008-1-kevin.brodsky@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250203_101950_931518_3C697832 X-CRM114-Status: UNSURE ( 9.73 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Introduce a new function, set_memory_pkey(), which sets the protection key (pkey) of pages in the specified linear mapping range. Architectures implementing kernel pkeys (kpkeys) must provide a suitable implementation; an empty stub is added as fallback. Signed-off-by: Kevin Brodsky --- include/linux/set_memory.h | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/include/linux/set_memory.h b/include/linux/set_memory.h index 3030d9245f5a..7b3a8bfde3c6 100644 --- a/include/linux/set_memory.h +++ b/include/linux/set_memory.h @@ -84,4 +84,11 @@ static inline int set_memory_decrypted(unsigned long addr, int numpages) } #endif /* CONFIG_ARCH_HAS_MEM_ENCRYPT */ +#ifndef CONFIG_ARCH_HAS_KPKEYS +static inline int set_memory_pkey(unsigned long addr, int numpages, int pkey) +{ + return 0; +} +#endif + #endif /* _LINUX_SET_MEMORY_H_ */