From mboxrd@z Thu Jan 1 00:00:00 1970 From: Nishanth Menon Subject: Re: [PATCH] ARM: DRA7: Enable Cortex A15 errata 798181 Date: Wed, 25 Mar 2015 18:32:26 -0500 Message-ID: <5513458A.50001@ti.com> References: <1427325909-7014-1-git-send-email-praneeth@ti.com> Mime-Version: 1.0 Content-Type: text/plain; charset="windows-1252" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1427325909-7014-1-git-send-email-praneeth@ti.com> Sender: linux-kernel-owner@vger.kernel.org To: Praneeth Bajjuri , Tony Lindgren , Russell King Cc: linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org List-Id: linux-omap@vger.kernel.org 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 -- Regards, Nishanth Menon