On 07/15/2013 01:03:22 AM, Aneesh Kumar K.V wrote:
Scott Wood <scottw...@freescale.com> writes:
> diff --git a/arch/powerpc/platforms/Kconfig.cputype
b/arch/powerpc/platforms/Kconfig.cputype
> index ae0aaea..7f0e2e5 100644
> --- a/arch/powerpc/platforms/Kconfig.cputype
> +++ b/arch/powerpc/platforms/Kconfig.cputype
> @@ -165,6 +165,17 @@ config PPC_E500MC
> such as e5500/e6500), and must be disabled for running on
> e500v1 or e500v2.
>
> +config FSL_ERRATUM_A_006958
> + bool
> + depends on PPC_E500MC && PPC64
> + default y
> + help
> + Workaround for erratum A-006958, which says that 64-bit
> + timebase reads are not atomic. The workaround is to fall back
> + to the 32-bit method of reading timebase. Note that timebase
> + is readable by userspace, so any non-vdso userspace accesses
> + will need to have the workaround applied separately.
> +
> config PPC_FPU
> bool
> default y if PPC64
I am completely new to this area, so ignore if it is silly. But how do
we expect to select this config ? Should that happen via .config ?
It will automatically be selected if PPC_E500MC and PPC64 are both
selected.
-Scott
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