From owner-svn-src-head@freebsd.org Sun Sep 27 09:14:16 2020 Return-Path: Delivered-To: svn-src-head@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id B80353F43C9; Sun, 27 Sep 2020 09:14:16 +0000 (UTC) (envelope-from mmel@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4Bzg2J446Tz4l4j; Sun, 27 Sep 2020 09:14:16 +0000 (UTC) (envelope-from mmel@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 6F1B7AC32; Sun, 27 Sep 2020 09:14:16 +0000 (UTC) (envelope-from mmel@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id 08R9EGAZ056538; Sun, 27 Sep 2020 09:14:16 GMT (envelope-from mmel@FreeBSD.org) Received: (from mmel@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id 08R9EGOc056537; Sun, 27 Sep 2020 09:14:16 GMT (envelope-from mmel@FreeBSD.org) Message-Id: <202009270914.08R9EGOc056537@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: mmel set sender to mmel@FreeBSD.org using -f From: Michal Meloun Date: Sun, 27 Sep 2020 09:14:16 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r366193 - head/sys/arm64/arm64 X-SVN-Group: head X-SVN-Commit-Author: mmel X-SVN-Commit-Paths: head/sys/arm64/arm64 X-SVN-Commit-Revision: 366193 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 27 Sep 2020 09:14:16 -0000 Author: mmel Date: Sun Sep 27 09:14:16 2020 New Revision: 366193 URL: https://svnweb.freebsd.org/changeset/base/366193 Log: Don't map same physical memory multiple times with different cache attributes. This is explicitly stated as architectural undefined behavior, leadint to coherencz issues sonner or later. Modified: head/sys/arm64/arm64/locore.S Modified: head/sys/arm64/arm64/locore.S ============================================================================== --- head/sys/arm64/arm64/locore.S Sun Sep 27 09:12:36 2020 (r366192) +++ head/sys/arm64/arm64/locore.S Sun Sep 27 09:14:16 2020 (r366193) @@ -498,7 +498,7 @@ common: cbz x19, 1f /* Create the identity mapping for FDT data (2 MiB max) */ - mov x7, #(ATTR_S1_nG | ATTR_S1_IDX(VM_MEMATTR_UNCACHEABLE)) + mov x7, #(ATTR_S1_nG | ATTR_S1_IDX(VM_MEMATTR_WRITE_BACK)) mov x9, x0 mov x8, x0 /* VA start (== PA start) */ mov x10, #1 @@ -508,7 +508,7 @@ common: #endif /* Create the VA = PA map */ - mov x7, #(ATTR_S1_nG | ATTR_S1_IDX(VM_MEMATTR_UNCACHEABLE)) + mov x7, #(ATTR_S1_nG | ATTR_S1_IDX(VM_MEMATTR_WRITE_BACK)) mov x9, x27 mov x8, x9 /* VA start (== PA start) */ mov x10, #1