From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753364AbbC0VnJ (ORCPT ); Fri, 27 Mar 2015 17:43:09 -0400 Received: from muru.com ([72.249.23.125]:40344 "EHLO muru.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752310AbbC0VnF (ORCPT ); Fri, 27 Mar 2015 17:43:05 -0400 Date: Fri, 27 Mar 2015 14:38:49 -0700 From: Tony Lindgren To: Nishanth Menon Cc: Praneeth Bajjuri , linux-omap@vger.kernel.org, Russell King , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH] ARM: DRA7: Enable Cortex A15 errata 798181 Message-ID: <20150327213848.GG10805@atomide.com> References: <1427325909-7014-1-git-send-email-praneeth@ti.com> <5513458A.50001@ti.com> <20150326173515.GB10805@atomide.com> <5515BEF4.7030201@ti.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <5515BEF4.7030201@ti.com> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Nishanth Menon [150327 13:35]: > On 03/26/2015 12:35 PM, Tony Lindgren wrote: > > * Nishanth Menon [150325 16:32]: > >> On 03/25/2015 06:25 PM, Praneeth Bajjuri wrote: > >>> ARM errata 798181 is applicable for OMAP5/DRA7 based devices. So enable > >>> the same in the build. > >>> > >>> DRA7xx is based on Cortex-A15 r2p2 revision. > >>> > >>> ARM 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. > >>> > >>> Signed-off-by: Praneeth Bajjuri > >>> --- > >>> 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 c7d8d86..3e4b4ae 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 > >>> > >> Gee thanks and Apologies on missing this patch. > >> > >> Acked-by: Nishanth Menon > >> > >> Seen on DRA7 only builds, so kinda slipped radar a bit.. verified to > >> apply on v4.0-rc1 > > > > Is this needed as a fix for v4.0-rc series or can this wait for v4.1? > I think we can wait till 4.1 OK thanks applying into omap-for-v4.1/fixes-not-urgent. Tony From mboxrd@z Thu Jan 1 00:00:00 1970 From: tony@atomide.com (Tony Lindgren) Date: Fri, 27 Mar 2015 14:38:49 -0700 Subject: [PATCH] ARM: DRA7: Enable Cortex A15 errata 798181 In-Reply-To: <5515BEF4.7030201@ti.com> References: <1427325909-7014-1-git-send-email-praneeth@ti.com> <5513458A.50001@ti.com> <20150326173515.GB10805@atomide.com> <5515BEF4.7030201@ti.com> Message-ID: <20150327213848.GG10805@atomide.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org * Nishanth Menon [150327 13:35]: > On 03/26/2015 12:35 PM, Tony Lindgren wrote: > > * Nishanth Menon [150325 16:32]: > >> On 03/25/2015 06:25 PM, Praneeth Bajjuri wrote: > >>> ARM errata 798181 is applicable for OMAP5/DRA7 based devices. So enable > >>> the same in the build. > >>> > >>> DRA7xx is based on Cortex-A15 r2p2 revision. > >>> > >>> ARM 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. > >>> > >>> Signed-off-by: Praneeth Bajjuri > >>> --- > >>> 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 c7d8d86..3e4b4ae 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 > >>> > >> Gee thanks and Apologies on missing this patch. > >> > >> Acked-by: Nishanth Menon > >> > >> Seen on DRA7 only builds, so kinda slipped radar a bit.. verified to > >> apply on v4.0-rc1 > > > > Is this needed as a fix for v4.0-rc series or can this wait for v4.1? > I think we can wait till 4.1 OK thanks applying into omap-for-v4.1/fixes-not-urgent. Tony