From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wr1-f74.google.com (mail-wr1-f74.google.com [209.85.221.74]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 62081370D6B for ; Tue, 19 May 2026 15:18:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.221.74 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779203904; cv=none; b=A5DgeY4FgHOfeyCIgSBgeyvZ3Pb3ZPO+ALEEa4PbjHp0F6Wn7g64ANY2xWYdh/FW5XgB3qaB79gV2GQUeaNPQ1Kx0eXa2KsdyLa/f8FTno92jxbS5T1fINxJTqz6j5qT/sGav3QCz6FEbsLBpN1D+UkZQEIE0jl9gYrEnAtKV9Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779203904; c=relaxed/simple; bh=j6rU7HZIbA29M7FJgo6c6eUkDTWk/GsM8wAUoAZDqWY=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=lOJdJIsLVrGWUPnuDC33CmQv0NbfN8zQPG2FNznOaI1vpCIbiaXvZ0bI63k92YTD5fYcOo157jZA91KLweatfsw/S3BPcDqCe0coy/vhI4Ra6DBCbzDE2xY6Gg9aMgYnjxv8V/wOBanz13hk9FWzRvlpN/SOJ/ivppy3ZlWUHew= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--ardb.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=E3hhQl15; arc=none smtp.client-ip=209.85.221.74 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--ardb.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="E3hhQl15" Received: by mail-wr1-f74.google.com with SMTP id ffacd0b85a97d-45dbbbf8d57so5330042f8f.3 for ; Tue, 19 May 2026 08:18:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1779203896; x=1779808696; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=psqo5lxuXKrUhh3uDGGTtGkdaLsuRg1me0VLpzKluKY=; b=E3hhQl15latC20TMGsogDQrmbHcjjvdU94KsgJ63dwefCWcAAeiCXxwLMmswPkpGN6 gHhv5Hv0UxPqfMTSCVRNMwnA+OkJZQFCnnzPUsHb92VL715RJPvFHpkNKULvPKZMpe76 ZP01tD5H7VkPPYJNjFi/z0OZjiwG3MpwxMikG+S4PyEsmlJpHKkcpnbXB1Fr0luvEqDH n1Fu1Fu39z1V5j5ji+QeHnAoBVAseaDQwZTAxV6NACsTOEwuJj1fJYl7M+YXN2HPc1F9 9uWPndSm+J46932aGqmVWHSkMDxDGYdbRrWQGxJmlScroKcEB8zt5mUcmo3x6SEEQhrY zi8w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1779203896; x=1779808696; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=psqo5lxuXKrUhh3uDGGTtGkdaLsuRg1me0VLpzKluKY=; b=TpseSeT0GrjkMABt6xfTJ+OqxYXnaOpX+mpd1mnrj0kOIh20PibL/tc/wCRPkq0azn p9VJLWEXgqbC9/QunNfEWMBa1SDIbYucALPddf1h+EDFEYQ4Su5tB5S3g8UOrRnfa2Wa efGTfdIQ2jDcJylyJkx1fksrzdeOPupecUFGskZJR4Kqs8NzXhurGbsvOEnQnNGRuiz0 j8qVNL5DecoFvCVnH6XLnZ7soW7Q47notncWsIW43Cqo9vjR5FWfyYd7yb95+rczy4JT 7m2bCnxs7H7bXuQ4r1kJDqMrcDWEVqgobS5EuO9aEUFys/co7iWTEaOZV5Uy+3oDYuDW 3WRQ== X-Forwarded-Encrypted: i=1; AFNElJ+BAWNCCDXcDOyfGnaFZAqmM4ECPa3ZfIETys1IzjBsHFwF/nqZ/xIMjhkZyiknOxtGCx2D38JaDijXvhgrSMw=@vger.kernel.org X-Gm-Message-State: AOJu0YzyIo2YJttAkpC4SehmB1755RXMBV2eUbj7HF+maam2hAeUuXS3 8+H7UC0/PydJIfnTRKbvYyjFiDL0rB2Ix/1VG4R28casYFJyojA9336fF5pfjIS5usqSQW/CjQ= = X-Received: from wmrc10.prod.google.com ([2002:a05:600c:aca:b0:488:7b85:acf0]) (user=ardb job=prod-delivery.src-stubby-dispatcher) by 2002:a05:600c:4e46:b0:488:bc6a:528d with SMTP id 5b1f17b1804b1-48fe632243cmr328900025e9.22.1779203896424; Tue, 19 May 2026 08:18:16 -0700 (PDT) Date: Tue, 19 May 2026 17:16:18 +0200 In-Reply-To: <20260519151616.2557018-15-ardb+git@google.com> Precedence: bulk X-Mailing-List: linux-hardening@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260519151616.2557018-15-ardb+git@google.com> X-Developer-Key: i=ardb@kernel.org; a=openpgp; fpr=F43D03328115A198C90016883D200E9CA6329909 X-Developer-Signature: v=1; a=openpgp-sha256; l=911; i=ardb@kernel.org; h=from:subject; bh=uYqf26ha3K7mBUMG5pQkMvA1333YXFAF+bz49QK3I9c=; b=owGbwMvMwCVmkMcZplerG8N4Wi2JIYun7nCKotCqPVHbJlU/P5+WPXNtRp6U1LQXbxdfmBE1Y 0raotU9HaUsDGJcDLJiiiwCs/++23l6olSt8yxZmDmsTCBDGLg4BWAiOm8YGdZPT5zjozhLrdzq W9rh4yk/1SbP27vU5sihNukc80LNiGCGf9ocz6d5P87N5VjR8+WxStrSZ0/T/5+7djo9/dI6ySM 2HzkB X-Mailer: git-send-email 2.54.0.563.g4f69b47b94-goog Message-ID: <20260519151616.2557018-16-ardb+git@google.com> Subject: [PATCH v5 01/13] arm64: mm: Map the linear alias of text/rodata as tagged From: Ard Biesheuvel To: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org, will@kernel.org, catalin.marinas@arm.com, mark.rutland@arm.com, Ard Biesheuvel , Ryan Roberts , Anshuman Khandual , Liz Prucka , Seth Jenkins , Kees Cook , Mike Rapoport , David Hildenbrand , Andrew Morton , Jann Horn , linux-mm@kvack.org, linux-hardening@vger.kernel.org Content-Type: text/plain; charset="UTF-8" From: Ard Biesheuvel Before moving the empty_zero_page into the .rodata section, make sure its linear alias has the memory-tagged type. This is needed to ensure that cpu_enable_mte() will be able to initialize the tags correctly. Signed-off-by: Ard Biesheuvel --- arch/arm64/mm/mmu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c index dd85e093ffdb..0c3d97f120e1 100644 --- a/arch/arm64/mm/mmu.c +++ b/arch/arm64/mm/mmu.c @@ -1195,7 +1195,7 @@ static void __init map_mem(pgd_t *pgdp) * so we should avoid them here. */ __map_memblock(pgdp, kernel_start, kernel_end, - PAGE_KERNEL, NO_CONT_MAPPINGS); + pgprot_tagged(PAGE_KERNEL), NO_CONT_MAPPINGS); memblock_clear_nomap(kernel_start, kernel_end - kernel_start); arm64_kfence_map_pool(early_kfence_pool, pgdp); } -- 2.54.0.563.g4f69b47b94-goog