&os;/arm64

From owner-svn-doc-all@freebsd.org Fri Jul 28 21:22:12 2017 Return-Path: Delivered-To: svn-doc-all@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id B630ADCFB54; Fri, 28 Jul 2017 21:22:12 +0000 (UTC) (envelope-from bjk@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 mx1.freebsd.org (Postfix) with ESMTPS id 83C5A71F81; Fri, 28 Jul 2017 21:22:12 +0000 (UTC) (envelope-from bjk@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id v6SLMBvp080186; Fri, 28 Jul 2017 21:22:11 GMT (envelope-from bjk@FreeBSD.org) Received: (from bjk@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id v6SLMBJ1080185; Fri, 28 Jul 2017 21:22:11 GMT (envelope-from bjk@FreeBSD.org) Message-Id: <201707282122.v6SLMBJ1080185@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: bjk set sender to bjk@FreeBSD.org using -f From: Benjamin Kaduk Date: Fri, 28 Jul 2017 21:22:11 +0000 (UTC) To: doc-committers@freebsd.org, svn-doc-all@freebsd.org, svn-doc-head@freebsd.org Subject: svn commit: r50598 - head/en_US.ISO8859-1/htdocs/news/status X-SVN-Group: doc-head X-SVN-Commit-Author: bjk X-SVN-Commit-Paths: head/en_US.ISO8859-1/htdocs/news/status X-SVN-Commit-Revision: 50598 X-SVN-Commit-Repository: doc MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-doc-all@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: "SVN commit messages for the entire doc trees \(except for " user" , " projects" , and " translations" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 28 Jul 2017 21:22:12 -0000 Author: bjk Date: Fri Jul 28 21:22:11 2017 New Revision: 50598 URL: https://svnweb.freebsd.org/changeset/doc/50598 Log: Add 2017Q2 arm64 entry from andrew Modified: head/en_US.ISO8859-1/htdocs/news/status/report-2017-04-2017-06.xml Modified: head/en_US.ISO8859-1/htdocs/news/status/report-2017-04-2017-06.xml ============================================================================== --- head/en_US.ISO8859-1/htdocs/news/status/report-2017-04-2017-06.xml Fri Jul 28 21:15:41 2017 (r50597) +++ head/en_US.ISO8859-1/htdocs/news/status/report-2017-04-2017-06.xml Fri Jul 28 21:22:11 2017 (r50598) @@ -1699,4 +1699,59 @@ and net/coda_server). + + + &os;/arm64 + + + + + Andrew + Turner + + andrew@FreeBSD.org + + + + + &os; arm64 Wiki Page + + + +

Support for the Privilege Access Never (PAN) feature was + added. This stops the kernel from accessing userspace + memory, except through specific instructions. This helps + security by only allowing access to userspace via the + correct accessor functions. This is enabled on all + supported CPUs that implement ARMv8.1 or later.

+ +

The pmap code now supports the Unprivileged + execute-never (UXN) and Privileged execute-never (PXN) bits + in the page tables. These bits stop userspace and the + kernel, respectively, from executing instructions on any + marked page.

+ +

The performance of the pmap layer has been improved. Many + of the cache handling function calls have been removed. + Some were needed early on to work around other bugs that + have now been fixed. The removal of these calls has led to + a large performance improvement.

+ +

The kernel now uses crc32c instructions where + appropriate. These are an optional set of instructions to + perform crc32c quickly without using a lookup + table.c

+ +

The VM_MEMATTR_WRITE_THROUGH memory attribute is + now supported. This is used to allocate memory for the + framebuffer. Previously, the kernel would use cached + memory; however, this leads to visual artifacts. The + write-through flag fixes these by writing data out to + RAM.

+ +

The default linker on arm64 is now lld. This + means &os; is able to built itsself with just the components + in the base system, a big milestone!

+ +