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SubjectRe: [PATCH] ARM: DRA7: Enable Cortex A15 errata 798181
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 <praneeth@ti.com>
> ---
> 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 <nm@ti.com>

Seen on DRA7 only builds, so kinda slipped radar a bit.. verified to
apply on v4.0-rc1

--
Regards,
Nishanth Menon


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