From mboxrd@z Thu Jan 1 00:00:00 1970 Received: with ECARTIS (v1.0.0; list linux-mips); Thu, 11 Mar 2010 04:11:56 +0100 (CET) Received: from mail-bw0-f215.google.com ([209.85.218.215]:44214 "EHLO mail-bw0-f215.google.com" rhost-flags-OK-OK-OK-OK) by eddie.linux-mips.org with ESMTP id S1490963Ab0CKDLw (ORCPT ); Thu, 11 Mar 2010 04:11:52 +0100 Received: by bwz7 with SMTP id 7so6743579bwz.24 for ; Wed, 10 Mar 2010 19:11:45 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:from:to:cc:subject:date :message-id:x-mailer:mime-version:content-type :content-transfer-encoding; bh=M+/1Nf6//C1Mhbr3obKmGo5Tb9r0JGT/4+1EJGzfUzM=; b=gdE2Hu8IlccXs0N8YhLoLiB+dE0aULgO0se/TcECOWenLfyTFO1SfCd/GuVo/kZKdn dVlQ8V05lHKvXP2izIzLZhNXA+98VOOxxaoJbKL2yTwvyvbMz5dUDWWEJmDc4kNo55Td 2vkPTbrLCQK0f1vtUdePA8d+VxbIA9t7q7qrM= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=from:to:cc:subject:date:message-id:x-mailer:mime-version :content-type:content-transfer-encoding; b=cPuE2CLki/9FS0Mn2cQs5Q+hIrD2EuZT1JR4hJEMxSXyl5KQImtG2/EuNb3MFAn/xi zilN3gL3/euCbri3scmBwa5WcUfQufa3/eD++arGgcugAS3hRw1jyamh4NqevDFUiEZW 729AZ5F4bLT4UQI6FlICTlO6otIdQpEesGvrg= Received: by 10.204.7.139 with SMTP id d11mr215201bkd.162.1268277102328; Wed, 10 Mar 2010 19:11:42 -0800 (PST) Received: from localhost.localdomain ([202.201.12.142]) by mx.google.com with ESMTPS id g18sm30688020bkw.13.2010.03.10.19.11.37 (version=TLSv1/SSLv3 cipher=RC4-MD5); Wed, 10 Mar 2010 19:11:41 -0800 (PST) From: Wu Zhangjin To: Ralf Baechle Cc: linux-mips@linux-mips.org, Sergei Shtylyov , Wu Zhangjin Subject: [PATCH v2 0/3] Workaround the Out-of-order Issue of Loongson-2F Date: Thu, 11 Mar 2010 11:05:01 +0800 Message-Id: X-Mailer: git-send-email 1.7.0.1 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Return-Path: X-Envelope-To: <"|/home/ecartis/ecartis -s linux-mips"> (uid 0) X-Orcpt: rfc822;linux-mips@linux-mips.org Original-Recipient: rfc822;linux-mips@linux-mips.org X-archive-position: 26186 X-ecartis-version: Ecartis v1.0.0 Sender: linux-mips-bounce@linux-mips.org Errors-to: linux-mips-bounce@linux-mips.org X-original-sender: wuzhangjin@gmail.com Precedence: bulk X-list: linux-mips From: Wu Zhangjin Changes from old version: o Cleanup some comments and align some instructions. ---- As the Chapter 15: "Errata: Issue of Out-of-order in loongson"[1] shows, to workaround the Issue of Loongson-2F，We need to do: o When switching from user model to kernel model, you should flush the branch target history such as BTB and RAS. o Doing some tricks to the indirect branch target to make sure that the indirect branch target can not be in the I/O region. This patchset applied the above methods and for the binutils patch[3] have been merged into binutils 2.20.1, so, it's time to upstream this patchset now. without this patch, the machines will hang when the instruction sequence hit the Out-of-order Issue of Loongson-2F, therefore, this patchset is very urgent for both 2.6.33 and 2.6.34. [1] Chinese Version: http://www.loongson.cn/uploadfile/file/20080821113149.pdf [2] English Version of Chapter 15: http://groups.google.com.hk/group/loongson-dev/msg/e0d2e220958f10a6?dmode=source [3] http://sourceware.org/ml/binutils/2009-11/msg00387.html Regards, Wu Zhangjin Wu Zhangjin (3): Loongson-2F: Flush the branch target history such as BTB and RAS Loongson-2F: Enable fixups of binutils 2.20.1 Loongson-2F: Fixup of problems introduced by -mfix-loongson2f-jump of binutils 2.20.1 arch/mips/Makefile | 4 +++- arch/mips/include/asm/stackframe.h | 19 +++++++++++++++++++ arch/mips/loongson/common/reset.c | 11 ++++++++++- 3 files changed, 32 insertions(+), 2 deletions(-)