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 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 A6BDDCD5BB1 for ; Tue, 26 May 2026 11:17:23 +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:Cc:To:In-Reply-To:References :Message-Id:Content-Transfer-Encoding:Content-Type:MIME-Version:Subject:Date: From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=O+b83bGMCzyEzByJ+5LU82nBa96lT9m0LV7qEzNfGOc=; b=0irxpJH0ox6HP4YF7R/a8sPKy8 risea5hELaOJNp5I9H/kqYysJPAphooUFW9uLedA+qpeDIrZe8ubyADc2MSP5YR3GK3o8mZyVg+Xo TXuZtNuVS+s1Tn5e8kSNt32V4VznrUwoG53L4zPJ5rbsozF1wojZTSyxTrtX5xPCfzgAQ2FHs8C/8 k8tgTFxuW/wmsDG4rXDAArEi/v0ZVrL8YpZiIXWUFYIxBk3Xk7RixLaxJsiVsLpDADpYOV7VSZO5D pClx5qVkUWSxF7dVCHOdsMX6cE/mJX8StYqafdQu/c0BIu6s8gr49aZ/ucWN4B2kUEch1EMfbyAt2 wX8OLQ6w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wRpme-00000001kBt-0TKH; Tue, 26 May 2026 11:17:16 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wRpmX-00000001k90-491m for linux-arm-kernel@lists.infradead.org; Tue, 26 May 2026 11:17:11 +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 92E32169C; Tue, 26 May 2026 04:17:03 -0700 (PDT) Received: from localhost.localdomain (e123572-lin.cambridge.arm.com [10.1.194.54]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 24E033F7D8; Tue, 26 May 2026 04:17:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1779794228; bh=+OGpwgzVEkFFPsMOgL6J2ZFY9bOrw4hijWLmgpJn7uk=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=NXGgiha6GINynS7xkcX0uVVxHjHvcpyuF7Tk/QpU/L1V6x4CHZsHCvSUYs0ET6+nz ogt+V9rf6M9baMkmmGSc1m8ROeEoXFuS/FC+MHYGVrDhkuB8nXX/P96j8D/2/W9dzY pEnZJ1K4rGcr6qUXdyJ80DfLZxP3qa6AGXOOPeTE= From: Kevin Brodsky Date: Tue, 26 May 2026 12:15:51 +0100 Subject: [PATCH RFC v8 02/24] set_memory: Introduce set_memory_pkey() stub MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260526-kpkeys-v8-2-eaaacdacc67c@arm.com> References: <20260526-kpkeys-v8-0-eaaacdacc67c@arm.com> In-Reply-To: <20260526-kpkeys-v8-0-eaaacdacc67c@arm.com> To: linux-hardening@vger.kernel.org Cc: Kevin Brodsky , Andrew Morton , Andy Lutomirski , Catalin Marinas , Dave Hansen , "David Hildenbrand (Arm)" , Ira Weiny , Jann Horn , Jeff Xu , Joey Gouly , Kees Cook , Linus Walleij , Marc Zyngier , Mark Brown , Matthew Wilcox , Maxwell Bland , "Mike Rapoport (IBM)" , Peter Zijlstra , Pierre Langlois , Quentin Perret , Rick Edgecombe , Ryan Roberts , Vlastimil Babka , Will Deacon , Yang Shi , Yeoreum Yun , linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, x86@kernel.org, Lorenzo Stoakes , Thomas Gleixner X-Mailer: b4 0.15.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1779794211; l=917; i=kevin.brodsky@arm.com; s=20260427; h=from:subject:message-id; bh=+OGpwgzVEkFFPsMOgL6J2ZFY9bOrw4hijWLmgpJn7uk=; b=8De/kV8sEljigJjiEvqeCIMnPh9ZNqCIUniOyYuqA+vqWE1URz0rwYAePpTlekHMqoi9dpv9D +dX7ogRAjKbAfS1LyoNEllngretraN0QIiB7BLwfLTbt1YABdnxPt1a X-Developer-Key: i=kevin.brodsky@arm.com; a=ed25519; pk=N2QG+eJKrvkNovwhhwJhnJ4+ScVfsGCHldmqLfcMTFs= X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260526_041710_072304_8E44BC24 X-CRM114-Status: UNSURE ( 9.99 ) 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_ */ -- 2.51.2