From owner-svn-src-stable-12@freebsd.org Sun Sep 15 21:27:15 2019 Return-Path: Delivered-To: svn-src-stable-12@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 1D514E8613; Sun, 15 Sep 2019 21:27:15 +0000 (UTC) (envelope-from alc@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) server-signature RSA-PSS (4096 bits) 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 46WjBV73sMz3GGD; Sun, 15 Sep 2019 21:27:14 +0000 (UTC) (envelope-from alc@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 D1705E3FE; Sun, 15 Sep 2019 21:27:14 +0000 (UTC) (envelope-from alc@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id x8FLRECJ081900; Sun, 15 Sep 2019 21:27:14 GMT (envelope-from alc@FreeBSD.org) Received: (from alc@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id x8FLREOa081899; Sun, 15 Sep 2019 21:27:14 GMT (envelope-from alc@FreeBSD.org) Message-Id: <201909152127.x8FLREOa081899@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: alc set sender to alc@FreeBSD.org using -f From: Alan Cox Date: Sun, 15 Sep 2019 21:27:14 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r352367 - stable/12/sys/arm64/arm64 X-SVN-Group: stable-12 X-SVN-Commit-Author: alc X-SVN-Commit-Paths: stable/12/sys/arm64/arm64 X-SVN-Commit-Revision: 352367 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-stable-12@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: SVN commit messages for only the 12-stable src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 15 Sep 2019 21:27:15 -0000 Author: alc Date: Sun Sep 15 21:27:14 2019 New Revision: 352367 URL: https://svnweb.freebsd.org/changeset/base/352367 Log: MFC r349905 According to Section D5.10.3 "Maintenance requirements on changing System register values" of the architecture manual, an isb instruction should be executed after updating ttbr0_el1 and before invalidating the TLB. Modified: stable/12/sys/arm64/arm64/efirt_machdep.c stable/12/sys/arm64/arm64/pmap.c Directory Properties: stable/12/ (props changed) Modified: stable/12/sys/arm64/arm64/efirt_machdep.c ============================================================================== --- stable/12/sys/arm64/arm64/efirt_machdep.c Sun Sep 15 21:13:13 2019 (r352366) +++ stable/12/sys/arm64/arm64/efirt_machdep.c Sun Sep 15 21:27:14 2019 (r352367) @@ -245,6 +245,7 @@ efi_arch_enter(void) __asm __volatile( "msr ttbr0_el1, %0 \n" + "isb \n" "dsb ishst \n" "tlbi vmalle1is \n" "dsb ish \n" @@ -262,6 +263,7 @@ efi_arch_leave(void) td = curthread; __asm __volatile( "msr ttbr0_el1, %0 \n" + "isb \n" "dsb ishst \n" "tlbi vmalle1is \n" "dsb ish \n" Modified: stable/12/sys/arm64/arm64/pmap.c ============================================================================== --- stable/12/sys/arm64/arm64/pmap.c Sun Sep 15 21:13:13 2019 (r352366) +++ stable/12/sys/arm64/arm64/pmap.c Sun Sep 15 21:27:14 2019 (r352367) @@ -5175,8 +5175,10 @@ pmap_activate(struct thread *td) critical_enter(); pmap = vmspace_pmap(td->td_proc->p_vmspace); td->td_proc->p_md.md_l0addr = vtophys(pmap->pm_l0); - __asm __volatile("msr ttbr0_el1, %0" : : - "r"(td->td_proc->p_md.md_l0addr)); + __asm __volatile( + "msr ttbr0_el1, %0 \n" + "isb \n" + : : "r"(td->td_proc->p_md.md_l0addr)); pmap_invalidate_all(pmap); critical_exit(); }