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 X-Spam-Level: X-Spam-Status: No, score=-2.5 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 61EBFC5DF60 for ; Tue, 5 Nov 2019 17:44:54 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 3A670214D8 for ; Tue, 5 Nov 2019 17:44:54 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="dh2lBoXg"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=sirena.org.uk header.i=@sirena.org.uk header.b="lNZDGZCs" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3A670214D8 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender:Content-Type:Cc: List-Subscribe:List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id: In-Reply-To:MIME-Version:References:Message-ID:Subject:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=5nZuTb60Gf2QFjJkejBgvg8uWk0OsdUfegWSeILkT5k=; b=dh2lBoXgmc2YzhILz4i3Dh77X l9wT1JCQ2EAhhGNvBqePSVth5OeTgpUwNHglTJnqeo7EOVr3oLTAe60DKzgxN5jJOg1a1DKtb5c9a DGyHdA34Chw0BB3gWBrEJZ7RyySajf6DNXbtnhkK3uU5wmkVYuRkcskk/9TWYNPTeqqwZ534low9K ZBfFWMQ9C8ktt7g2wUXOZ1hAYPki+HU67ijTI8FMbhvgr+bm5RTxvRswUBZqeakSD//t/RuCh8Hw2 ruyzy7rKskJ4bKCkQ3vnD1R0a70GO/TBvpZtTTyE4lOG9RBj4M+nkLW+J1xW6lyFz240sLq+GiUDY R1lKmX1qQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1iS2su-0008IQ-UD; Tue, 05 Nov 2019 17:44:52 +0000 Received: from heliosphere.sirena.org.uk ([172.104.155.198]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1iS2sr-0008Ha-Qk for linux-arm-kernel@lists.infradead.org; Tue, 05 Nov 2019 17:44:51 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sirena.org.uk; s=20170815-heliosphere; h=In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=olNjguwSeZOlAMio+fbDK9OqNAVdTuRGYF4d5jr6w0I=; b=lNZDGZCsPn5jkLKsCRSsbNZc5 Cjua+qwCzIrs5TZbahHtEq2uNHOd7JNlDh9UNMsagy4DqIXosVkSBITmwANV6a8ThdES825Erx1sO yeFRx5iyTBTgadfrCJmaM0ZyXDN9p63zgA8VXh69GAAngeuv5PNRdWquEfr6nwQWzB2nI=; Received: from cpc102320-sgyl38-2-0-cust46.18-2.cable.virginm.net ([82.37.168.47] helo=ypsilon.sirena.org.uk) by heliosphere.sirena.org.uk with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1iS2so-0007FK-3D; Tue, 05 Nov 2019 17:44:46 +0000 Received: by ypsilon.sirena.org.uk (Postfix, from userid 1000) id 2ABE9274301E; Tue, 5 Nov 2019 17:44:45 +0000 (GMT) Date: Tue, 5 Nov 2019 17:44:45 +0000 From: Mark Brown To: Catalin Marinas Subject: Re: [PATCH v5 4/4] arm64: Use a variable to store non-global mappings decision Message-ID: <20191105174445.GD4500@sirena.co.uk> References: <20191104191524.10596-1-broonie@kernel.org> <20191104191524.10596-5-broonie@kernel.org> <20191105173005.GE22987@arrakis.emea.arm.com> MIME-Version: 1.0 In-Reply-To: <20191105173005.GE22987@arrakis.emea.arm.com> X-Cookie: Genius is pain. User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191105_094449_889390_8A5579B7 X-CRM114-Status: GOOD ( 11.10 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Will Deacon , linux-arm-kernel@lists.infradead.org Content-Type: multipart/mixed; boundary="===============4951128416230956143==" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org --===============4951128416230956143== Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="/unnNtmY43mpUSKx" Content-Disposition: inline --/unnNtmY43mpUSKx Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Tue, Nov 05, 2019 at 05:30:06PM +0000, Catalin Marinas wrote: > On Mon, Nov 04, 2019 at 07:15:24PM +0000, Mark Brown wrote: > > + /* > > + * If know now we are going to need KPTI then use non-global > > + * mappings from the start, avoiding the cost of rewriting > > + * everything later. > > + */ > > + arm64_use_ng_mappings = kaslr_requires_kpti(); > > } > I think we need this even earlier in paging_init() before we start > creating the kernel mappings. OK, I'll move it. I didn't see any global mappings getting created with the current code but better safe than sorry. --/unnNtmY43mpUSKx Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEreZoqmdXGLWf4p/qJNaLcl1Uh9AFAl3BtQwACgkQJNaLcl1U h9AHlQgAgU+g8NdNkBmSCcNRFYNt9KOOZ5qs11DH+cQFCAa3U8kgQUtYxHJzzi9m bMf/HI3+HE2r7sQ1KE8UqbR/+ILptkhpzC42UOdp166T9yLr3IK6A+wwI6GTTgvu lXjOGmJQxB3jZr1nuHUuAlLpIqh60fs2jWqz6lNizooIBJabFLrbLBN9rh9JDtrg d3DmTKtHa4o1isZTqHZQw15MLdOXJms6mqj5nk8LwPgHpqf1Zz1p96GNSuCPxDv9 ppRIc8FDxULOzrHvU1pq0wePTocof729MW2qEbWk0pTeSgjazWGi4lMGQ7D29/zp PIJTJe9bRvJ1CtYHDXKzJUtkyC29EA== =4Z0/ -----END PGP SIGNATURE----- --/unnNtmY43mpUSKx-- --===============4951128416230956143== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel --===============4951128416230956143==--