From owner-svn-src-head@freebsd.org Thu Nov 1 22:17:52 2018 Return-Path: Delivered-To: svn-src-head@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 2E36610DAFD2; Thu, 1 Nov 2018 22:17:52 +0000 (UTC) (envelope-from jhb@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id CBC378F33F; Thu, 1 Nov 2018 22:17:51 +0000 (UTC) (envelope-from jhb@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 ACCDC21CE0; Thu, 1 Nov 2018 22:17:51 +0000 (UTC) (envelope-from jhb@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id wA1MHpO7033730; Thu, 1 Nov 2018 22:17:51 GMT (envelope-from jhb@FreeBSD.org) Received: (from jhb@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id wA1MHpB7033729; Thu, 1 Nov 2018 22:17:51 GMT (envelope-from jhb@FreeBSD.org) Message-Id: <201811012217.wA1MHpB7033729@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: jhb set sender to jhb@FreeBSD.org using -f From: John Baldwin Date: Thu, 1 Nov 2018 22:17:51 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r340029 - head/sys/riscv/riscv X-SVN-Group: head X-SVN-Commit-Author: jhb X-SVN-Commit-Paths: head/sys/riscv/riscv X-SVN-Commit-Revision: 340029 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: 2.1.29 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: Thu, 01 Nov 2018 22:17:52 -0000 Author: jhb Date: Thu Nov 1 22:17:51 2018 New Revision: 340029 URL: https://svnweb.freebsd.org/changeset/base/340029 Log: Set PTE_A and PTE_D for user mappings in pmap_enter(). This assumes that an access according to the prot in 'flags' triggered a fault and is going to be retried after the fault returns, so the two flags are set preemptively to avoid refaulting on the retry. While here, only bother setting PTE_D for kernel mappings in pmap_enter for writable mappings. Reviewed by: markj Sponsored by: DARPA Differential Revision: https://reviews.freebsd.org/D17782 Modified: head/sys/riscv/riscv/pmap.c Modified: head/sys/riscv/riscv/pmap.c ============================================================================== --- head/sys/riscv/riscv/pmap.c Thu Nov 1 22:15:25 2018 (r340028) +++ head/sys/riscv/riscv/pmap.c Thu Nov 1 22:17:51 2018 (r340029) @@ -2088,13 +2088,15 @@ pmap_enter(pmap_t pmap, vm_offset_t va, vm_page_t m, v pa = VM_PAGE_TO_PHYS(m); pn = (pa / PAGE_SIZE); - new_l3 = PTE_V | PTE_R | PTE_X; + new_l3 = PTE_V | PTE_R | PTE_X | PTE_A; + if (flags & VM_PROT_WRITE) + new_l3 |= PTE_D; if (prot & VM_PROT_WRITE) new_l3 |= PTE_W; if ((va >> 63) == 0) new_l3 |= PTE_U; - else - new_l3 |= PTE_A | PTE_D; + else if (prot & VM_PROT_WRITE) + new_l3 |= PTE_D; new_l3 |= (pn << PTE_PPN0_S); if ((flags & PMAP_ENTER_WIRED) != 0)