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 A0B43FEFB70 for ; Fri, 27 Feb 2026 17:57:41 +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=qp/N2Lh2Uz7eg8gMDrZELt6NrAjawyjuQWmtcBs8hFQ=; b=axsdoBA8/0AkxYgyPSOo8vCDTa qlsazqlqUj2xvq1oA0OgEbVIiiYX0F7BPWQeeKkT56vgiocfivYKGyfMdI8qGX80qXs3XdBdCFidI LOhB2FjDzplvXoGopLrH0EQRRuKNBNCtV+ERqk/tjnDFtJuFVH3N4O7+jzkJ5IgwSqVTbwbfZN/No cfKwYgOvZMZMT9DaZSoRafJSAQNb9ZuLyZG7tmsGVyB9gKyWCwanNy9OrY2cGxKCa7QvUutSA6siS 2SZoWBFMxHPkv6mG2XhvJU1MILp6T9a5iKlfWSjfpehqE1T5PB9wA/sKDnKsfSFfXbUgxBjlZIzn/ RPJaHQ1Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vw25n-00000008rm5-3YQH; Fri, 27 Feb 2026 17:57:35 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vw25a-00000008rYY-3n9i for linux-arm-kernel@lists.infradead.org; Fri, 27 Feb 2026 17:57:28 +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 BCC68176B; Fri, 27 Feb 2026 09:57:15 -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 AA3253F73B; Fri, 27 Feb 2026 09:57:17 -0800 (PST) From: Kevin Brodsky To: linux-hardening@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Kevin Brodsky , Andrew Morton , Andy Lutomirski , Catalin Marinas , Dave Hansen , David Hildenbrand , Ira Weiny , Jann Horn , Jeff Xu , Joey Gouly , Kees Cook , Linus Walleij , Lorenzo Stoakes , Marc Zyngier , Mark Brown , Matthew Wilcox , Maxwell Bland , "Mike Rapoport (IBM)" , Peter Zijlstra , Pierre Langlois , Quentin Perret , Rick Edgecombe , Ryan Roberts , Thomas Gleixner , Vlastimil Babka , Will Deacon , Yang Shi , Yeoreum Yun , linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, x86@kernel.org Subject: [PATCH v6 21/30] arm64: set_memory: Implement arch_has_pte_only_direct_map() Date: Fri, 27 Feb 2026 17:55:09 +0000 Message-ID: <20260227175518.3728055-22-kevin.brodsky@arm.com> X-Mailer: git-send-email 2.51.2 In-Reply-To: <20260227175518.3728055-1-kevin.brodsky@arm.com> References: <20260227175518.3728055-1-kevin.brodsky@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260227_095723_140611_FBC83FFB X-CRM114-Status: GOOD ( 10.89 ) 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 Implement the new arch helper, which is equivalent to force_pte_mapping(). Signed-off-by: Kevin Brodsky --- arch/arm64/include/asm/set_memory.h | 3 +++ arch/arm64/mm/mmu.c | 5 +++++ 2 files changed, 8 insertions(+) diff --git a/arch/arm64/include/asm/set_memory.h b/arch/arm64/include/asm/set_memory.h index b6cd6de34abf..2bf6e0b917e6 100644 --- a/arch/arm64/include/asm/set_memory.h +++ b/arch/arm64/include/asm/set_memory.h @@ -9,6 +9,9 @@ bool can_set_direct_map(void); #define can_set_direct_map can_set_direct_map +bool arch_has_pte_only_direct_map(void); +#define arch_has_pte_only_direct_map arch_has_pte_only_direct_map + int set_memory_valid(unsigned long addr, int numpages, int enable); int set_direct_map_invalid_noflush(struct page *page); diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c index 09ca62f77a84..a8e982ac5079 100644 --- a/arch/arm64/mm/mmu.c +++ b/arch/arm64/mm/mmu.c @@ -1181,6 +1181,11 @@ static void __init map_mem(pgd_t *pgdp) arm64_kfence_map_pool(early_kfence_pool, pgdp); } +bool arch_has_pte_only_direct_map(void) +{ + return force_pte_mapping(); +} + void mark_rodata_ro(void) { unsigned long section_size; -- 2.51.2