From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:60407) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YxHdo-0001lg-K1 for qemu-devel@nongnu.org; Tue, 26 May 2015 12:23:45 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1YxHdl-0008Ea-Fs for qemu-devel@nongnu.org; Tue, 26 May 2015 12:23:44 -0400 Received: from mail-qg0-x22a.google.com ([2607:f8b0:400d:c04::22a]:34439) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YxHdl-0008ET-AG for qemu-devel@nongnu.org; Tue, 26 May 2015 12:23:41 -0400 Received: by qgez61 with SMTP id z61so64965266qge.1 for ; Tue, 26 May 2015 09:23:40 -0700 (PDT) Sender: Richard Henderson Message-ID: <55649E09.4090707@twiddle.net> Date: Tue, 26 May 2015 09:23:37 -0700 From: Richard Henderson MIME-Version: 1.0 References: <1432243971-26417-1-git-send-email-aurelien@aurel32.net> <555E512F.4050603@twiddle.net> <20150523075906.GA25414@aurel32.net> <5560D607.7080101@twiddle.net> <20150525210516.GB29207@aurel32.net> <55639A39.1040408@suse.de> In-Reply-To: <55639A39.1040408@suse.de> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [PATCH] target-s390x: fix LOAD MULTIPLE instruction on page boundary List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Alexander Graf , qemu-devel@nongnu.org On 05/25/2015 02:55 PM, Alexander Graf wrote: > For linux-user we could just implement probe as > > foo = load_x_bytes(addr) > store_x_bytes(addr, foo) > > or can we have write-only maps there? One of these days I'm going to enable softmmu for linux-user, at least as an option. While direct loads and stores are nice, there are a whole pile of things that Just Don't Work. Especially guests with page sizes smaller than the host. Very few of the linux-user-test-0.3 suite even load e.g. on ppc64/aarch64 with a 64k page size. r~