From patchwork Wed Mar 25 22:12:24 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nishanth Menon X-Patchwork-Id: 6095401 Return-Path: X-Original-To: patchwork-linux-omap@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id CB7B0BF90F for ; Wed, 25 Mar 2015 22:13:05 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 0A8E1202F2 for ; Wed, 25 Mar 2015 22:13:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E93FC20148 for ; Wed, 25 Mar 2015 22:13:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752193AbbCYWND (ORCPT ); Wed, 25 Mar 2015 18:13:03 -0400 Received: from arroyo.ext.ti.com ([192.94.94.40]:56851 "EHLO arroyo.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750764AbbCYWNC (ORCPT ); Wed, 25 Mar 2015 18:13:02 -0400 Received: from dlelxv90.itg.ti.com ([172.17.2.17]) by arroyo.ext.ti.com (8.13.7/8.13.7) with ESMTP id t2PMCQe3016470; Wed, 25 Mar 2015 17:12:26 -0500 Received: from DLEE71.ent.ti.com (dlee71.ent.ti.com [157.170.170.114]) by dlelxv90.itg.ti.com (8.14.3/8.13.8) with ESMTP id t2PMCP1t015389; Wed, 25 Mar 2015 17:12:25 -0500 Received: from dlep33.itg.ti.com (157.170.170.75) by DLEE71.ent.ti.com (157.170.170.114) with Microsoft SMTP Server id 14.3.224.2; Wed, 25 Mar 2015 17:12:25 -0500 Received: from localhost (ileax41-snat.itg.ti.com [10.172.224.153]) by dlep33.itg.ti.com (8.14.3/8.13.8) with ESMTP id t2PMCPgG020528; Wed, 25 Mar 2015 17:12:25 -0500 From: Nishanth Menon To: Russell King , Tony Lindgren CC: , , , , Nishanth Menon Subject: [PATCH] ARM: DRA7: Enable Cortex A15 errata 798181 Date: Wed, 25 Mar 2015 17:12:24 -0500 Message-ID: <1427321544-5150-1-git-send-email-nm@ti.com> X-Mailer: git-send-email 1.7.9.5 MIME-Version: 1.0 Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP ARM errata 798181 is applicable for DRA7 based devices. So enable the same in the build. Errata extract and workaround information is as below. On Cortex-A15 (r0p0..r3p2) the TLBI*IS/DSB operations are not adequately shooting down all use of the old entries. The ARM_ERRATA_798181 option enables the Linux kernel workaround for this erratum which sends an IPI to the CPUs that are running the same ASID as the one being invalidated. Reported-by: Praneeth Kumar Bajjuri Signed-off-by: Nishanth Menon --- arch/arm/mach-omap2/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm/mach-omap2/Kconfig b/arch/arm/mach-omap2/Kconfig index 2b8e47788062..1f78709adb05 100644 --- a/arch/arm/mach-omap2/Kconfig +++ b/arch/arm/mach-omap2/Kconfig @@ -69,6 +69,7 @@ config SOC_DRA7XX select ARM_GIC select HAVE_ARM_ARCH_TIMER select IRQ_CROSSBAR + select ARM_ERRATA_798181 if SMP config ARCH_OMAP2PLUS bool