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 814BFC36010 for ; Fri, 11 Apr 2025 09:10:14 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [127.0.0.1]) by lists.ozlabs.org (Postfix) with ESMTP id 4ZYrVs0MK1z3btn; Fri, 11 Apr 2025 19:10:13 +1000 (AEST) Authentication-Results: lists.ozlabs.org; arc=none smtp.remote-ip=172.234.252.31 ARC-Seal: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1744362612; cv=none; b=W2DU45SFu+sszajeXIn+V+2PuMziTDbQmDTJQ2tW31hIfk1JMpMci3KZvvpA/b+59zu7SwuoAqCfwNdbGsh3ldJ7wmvhGOeXCYc4dvlBC2ZZ819JP3LLo8flgfn3pZIRcxze6gcWld+o1mZAjqFouuxCr+L6js40pF0Rpy5uKYePKrtzeuYEtNSmzB1uNw9FCtsvY1JGVZHQkZfhMIUxOy0pCZ0h498VRtReB/hPua4/jbCUkZ6qkU3VlPbi/cmH4Zp6DuQNix1KO6DUJ8X3rEmrJAIGaRZ0Obs7OgXrs9sdWT6Xfs3Po77XxZtQ2nZkWO3jYsyv7n/1gNJVSW3pDw== ARC-Message-Signature: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1744362612; c=relaxed/relaxed; bh=mJk8oJWZoNTTd4On2KCVVk2OTo+TigBo7qJMvAZpZjs=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=m9b3yxrTmayYxO2MDcnyDjPEDwmQ7NHGJNLkMc44n8D1XVsHeCgGDqFmiOxD3SPF1lv4IUHmGMJavx7yKZzDPFhkQ5PVhfUNFjZBT3XVLlXqtVn3a/XZZ6zZvBP0DF2FdrazsYqRUp6WFFxvJMNz6IQJ3y9lcjYjgxadOKk/BLOqqkoWuaRkG/sjGnn1YUqeTcFN9ecaAyKQ1jwusWdemqTNW9h0ITI6Oiq0MHPBto5vX63HtS5WQAzbwaEU0BPYqk4yYxR8uMB64plMpigC2ko2dOjHhgLSByTIMrBp1kSUdGzlkrYTrxBQ4hgWo6WZh9d+cRhDNjKaBR+xSC6fpg== ARC-Authentication-Results: i=1; lists.ozlabs.org; dmarc=pass (p=quarantine dis=none) header.from=kernel.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20201202 header.b=NpaUQ7D7; dkim-atps=neutral; spf=pass (client-ip=172.234.252.31; helo=sea.source.kernel.org; envelope-from=mingo@kernel.org; receiver=lists.ozlabs.org) smtp.mailfrom=kernel.org Authentication-Results: lists.ozlabs.org; dmarc=pass (p=quarantine dis=none) header.from=kernel.org Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20201202 header.b=NpaUQ7D7; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=kernel.org (client-ip=172.234.252.31; helo=sea.source.kernel.org; envelope-from=mingo@kernel.org; receiver=lists.ozlabs.org) Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4ZYrVp4kfWz2yrF for ; Fri, 11 Apr 2025 19:10:10 +1000 (AEST) Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id A4F75439A1; Fri, 11 Apr 2025 09:10:04 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id ED85FC4CEE2; Fri, 11 Apr 2025 09:10:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1744362605; bh=8Zf1l8FhhOvmDcUrwydoQzHxR+9Hs6zytjuZjgAOCFo=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=NpaUQ7D7fXnA5CFSGpmPhrBob5/1s31V2Xekejj1hAORbvFeQbeIf8k7X2YJa4p4+ BiTxwRcHep9f5AZNUoEb0/k1GrbpavmRGU5KhbJgEXGSXTge/P/F3u/kkd4oKPTHFf 61EeLOenMgRZdkUnnNjVnao6HH9jNc6eScn7ZrfBcKgNdFi4Aou6YKVLHJ3eJhgm2Y fEXDXXKA5tCoVYbZhtnSv6RWHciOO3GYEduGiKLpBDdznMarlfpaXG3uE79VVJcqFA U6CATX8gDE7XYNOJRzrNfygVtr9kGiU1vi5fZAGt0HzNkMHc4ovCN6KV5Ij2WF+80C Zed1ahSEbtH5w== Date: Fri, 11 Apr 2025 11:10:00 +0200 From: Ingo Molnar To: Andrew Donnellan Cc: linuxppc-dev@lists.ozlabs.org, x86@kernel.org, linux-mm@kvack.org, linux-riscv@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, pasha.tatashin@soleen.com, sweettea-kernel@dorminy.me, christophe.leroy@csgroup.eu Subject: Re: [PATCH v14 00/11] Support page table check on PowerPC Message-ID: References: <20250411054354.511145-1-ajd@linux.ibm.com> X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250411054354.511145-1-ajd@linux.ibm.com> * Andrew Donnellan wrote: > Support page table check on all PowerPC platforms. This works by > serialising assignments, reassignments and clears of page table > entries at each level in order to ensure that anonymous mappings > have at most one writable consumer, and likewise that file-backed > mappings are not simultaneously also anonymous mappings. > > In order to support this infrastructure, a number of stubs must be > defined for all powerpc platforms. Additionally, separate set_pte_at() > and set_pte_at_unchecked(), to allow for internal, uninstrumented mappings. > arch/x86/include/asm/pgtable.h | 22 +++---- For all the x86 function parameter extensions changes: Acked-by: Ingo Molnar Thanks, Ingo