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 lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (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 83DF7C44508 for ; Tue, 14 Jul 2026 14:08:13 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [127.0.0.1]) by lists.ozlabs.org (Postfix) with ESMTP id 4h01Nn2hCGz3cJG; Wed, 15 Jul 2026 00:08:09 +1000 (AEST) Authentication-Results: lists.ozlabs.org; arc=none smtp.remote-ip=217.140.110.172 ARC-Seal: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1784038089; cv=none; b=YcX5MPTo4ErmNT9M8V3OsqMVK9Ujjb3WlMJ6XKXhC4xgpUr8XVkyr0d/i+62qIhp+5oXNAd2oAOViXo3134WneIjYpPkvWm0lKxpmJQb+tigpqarqdV6MzAHQa13HDPCVRUgFE5i5Tosb4D59DPOrigKX3MDRmhqhW6W2hQbMpbLtx5pbsiavPfcjwFBmViKr+W/8Z2T8hoHdPaauw1RAXtHk+4hcz300qFVoTcorQUebT0sBUojALVNUEH9yleZJVR9cW1qh/sE/orABYNPvWunNUb280zu5OtfvIL7JzBvA8Khdz66GaldK6FV0UKiDTOxRLs4kWqh61OwWcJVJg== ARC-Message-Signature: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1784038089; c=relaxed/relaxed; bh=KoCRR95PLYnVxjBQ0+K98Mlg61rzeKsyaOHBI9FlQ+0=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=IMhvzgp2ZB29c7cDbMj8yb6r+a9a/OAsMoAFgBwXGPnMQWR5eLKs/PszrDCFNEcJP2+iiLRAEf1ms8vlVXtngqpSFtHcBTRdaFyZ/CMoQUSh6DrJ0Oz+A5SeitwIvnQjSLEFNbD52mcj7OC7mc7liBMOybnajEWHQQva51ewNA72I4/Zx+KzPU6Z2V/6vVF/g2T9jVfjiwgsgglsinFmbRhE648vfg38OQiWqrv1iqPFFQCcnN4QnS/LPeWaGe5jH2hJbkpW+8vNEa4uwhSI7SST51rz15U/07t+jVwTqFDEs4Xf1k2PjNq5xt6i+rZwGY6piyjK4FLy3VFNOKJD6Q== ARC-Authentication-Results: i=1; lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=arm.com; dkim=pass (1024-bit key; unprotected) header.d=arm.com header.i=@arm.com header.a=rsa-sha256 header.s=foss header.b=X2EPALpi; dkim-atps=neutral; spf=pass (client-ip=217.140.110.172; helo=foss.arm.com; envelope-from=kevin.brodsky@arm.com; receiver=lists.ozlabs.org) smtp.mailfrom=arm.com Authentication-Results: lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: lists.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=arm.com header.i=@arm.com header.a=rsa-sha256 header.s=foss header.b=X2EPALpi; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=arm.com (client-ip=217.140.110.172; helo=foss.arm.com; envelope-from=kevin.brodsky@arm.com; receiver=lists.ozlabs.org) Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lists.ozlabs.org (Postfix) with ESMTP id 4h01Nm2X5sz3bpx for ; Wed, 15 Jul 2026 00:08:08 +1000 (AEST) 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 B74CB1D14; Tue, 14 Jul 2026 07:07:32 -0700 (PDT) Received: from localhost.localdomain (e123572-lin.cambridge.arm.com [10.2.208.46]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 8FA7E3F7B4; Tue, 14 Jul 2026 07:07:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1784038057; bh=VrWlMtHqgM/vx22jiN3vYsU+W1Lh9jxCM8/DJ3H1HHw=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=X2EPALpiGXj7jZ//umW0i2ZiscPs5c3b9FVhjQsTjSc/roIUOCw5ccwKbAM8AZVT0 R190qpIisEqdGcWQOaI8LP3WSMdBvOg2L0DaCq9z+740FCzemmIORnkMA6TGphJBf+ c9VjfZElkzX4N0E1s95w/Vtd50JJkhxZY+d0MtYw= From: Kevin Brodsky Date: Tue, 14 Jul 2026 15:04:08 +0100 Subject: [PATCH 19/22] x86/tboot: mark tboot_mm as a kernel mm X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260714-remove_pgtable_cdtor-v1-19-44be8a7685d7@arm.com> References: <20260714-remove_pgtable_cdtor-v1-0-44be8a7685d7@arm.com> In-Reply-To: <20260714-remove_pgtable_cdtor-v1-0-44be8a7685d7@arm.com> To: linux-mm@kvack.org Cc: Kevin Brodsky , Andrew Morton , David Hildenbrand , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Pasha Tatashin , Russell King , Catalin Marinas , Will Deacon , Ryan Roberts , linux-arm-kernel@lists.infradead.org, Huacai Chen , loongarch@lists.linux.dev, "James E.J. Bottomley" , Helge Deller , linux-parisc@vger.kernel.org, Madhavan Srinivasan , Michael Ellerman , linuxppc-dev@lists.ozlabs.org, Paul Walmsley , Palmer Dabbelt , Albert Ou , linux-riscv@lists.infradead.org, Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Gerald Schaefer , linux-s390@vger.kernel.org, "David S. Miller" , Andreas Larsson , sparclinux@vger.kernel.org, Richard Weinberger , Anton Ivanov , Johannes Berg , linux-um@lists.infradead.org, Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , "H. Peter Anvin" , Andy Lutomirski , Peter Zijlstra , Ning Sun , x86@kernel.org, tboot-devel@lists.sourceforge.net, Ard Biesheuvel , Ilias Apalodimas , linux-efi@vger.kernel.org, Vishal Moola , Alistair Popple , "Matthew Wilcox (Oracle)" , linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org X-Mailer: b4 0.15.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1784037902; l=1553; i=kevin.brodsky@arm.com; s=20260427; h=from:subject:message-id; bh=VrWlMtHqgM/vx22jiN3vYsU+W1Lh9jxCM8/DJ3H1HHw=; b=m8zZWjxysI7gu08ZC5WjroF8ppS2XmCi+NSg9AchPnK6c6wz3EcnLIwt4UrkZ1Tknhd8Uq+lO humwu8pswzNB3IZSFZsQqWeKm+RG8SsPRg6CN1eLU7ZKufXomLaUKal X-Developer-Key: i=kevin.brodsky@arm.com; a=ed25519; pk=N2QG+eJKrvkNovwhhwJhnJ4+ScVfsGCHldmqLfcMTFs= tboot_mm is a kernel-owned address space used to build the identity map for tboot shutdown. Mark it with MMF_KERNEL so page table allocation and initialisation code treats its page tables as kernel page tables. Having marked tboot_mm as a kernel mm, we also need to convert pte_alloc_map() (user PTE) to pte_alloc_kernel() (kernel PTE), and drop the matching pte_unmap(). Assisted-by: Codex:GPT-5.5 Signed-off-by: Kevin Brodsky --- arch/x86/kernel/tboot.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/x86/kernel/tboot.c b/arch/x86/kernel/tboot.c index 46b8f1f16676..08c899f88e41 100644 --- a/arch/x86/kernel/tboot.c +++ b/arch/x86/kernel/tboot.c @@ -99,6 +99,7 @@ static struct mm_struct tboot_mm = { .pgd = swapper_pg_dir, .mm_users = ATOMIC_INIT(2), .mm_count = ATOMIC_INIT(1), + .flags = MM_FLAGS_INIT(MMF_KERNEL_MASK), .write_protect_seq = SEQCNT_ZERO(tboot_mm.write_protect_seq), MMAP_LOCK_INITIALIZER(init_mm) .page_table_lock = __SPIN_LOCK_UNLOCKED(init_mm.page_table_lock), @@ -129,11 +130,10 @@ static int map_tboot_page(unsigned long vaddr, unsigned long pfn, pmd = pmd_alloc(&tboot_mm, pud, vaddr); if (!pmd) return -1; - pte = pte_alloc_map(&tboot_mm, pmd, vaddr); + pte = pte_alloc_kernel(pmd, vaddr); if (!pte) return -1; set_pte_at(&tboot_mm, vaddr, pte, pfn_pte(pfn, prot)); - pte_unmap(pte); /* * PTI poisons low addresses in the kernel page tables in the -- 2.51.2