Re: [PATCH 5/5] arm64: Enable and document ARM errata 1319367 and 1319537

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Hi Marc,

On 25/09/2019 12:19, Marc Zyngier wrote:
> Now that everything is in place, let's get the ball rolling
> by allowing the corresponding config option to be selected.
> Also add the required information to silicon_arrata.rst.

> diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
> index 3adcec05b1f6..c50cd4f83bc4 100644
> --- a/arch/arm64/Kconfig
> +++ b/arch/arm64/Kconfig
> @@ -523,6 +523,16 @@ config ARM64_ERRATUM_1286807
>  	  invalidated has been observed by other observers. The
>  	  workaround repeats the TLBI+DSB operation.
>  
> +config ARM64_ERRATUM_1319367
> +	bool "Cortex-A57/A72: Speculative AT instruction using out-of-context translation regime could cause subsequent request to generate an incorrect translation"
> +	default y
> +	help
> +	  This option adds work arounds for ARM Cortex-A57 erratum 1319537
> +	  and A72 erratum 1319367
> +
> +	  Cortex-A57 and A72 cores could end-up with corrupted TLBs by
> +	  speculating an AT instruction during a guest context switch.
> +
>  	  If unsure, say Y.
>  
>  config ARM64_ERRATUM_1463225
> 

Nit: You pinched someone elses "If unsure, say Y."!



Thanks,

James
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