linux-kernel - Re: [PATCH v12 2/5] iommu: Enhance IOMMU default DMA mode build options

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Message-ID: <9a98ef6f-c804-4778-0503-6b82b828a851@linux.intel.com>
Date:   Sat, 12 Jun 2021 10:12:38 +0800
From:   Lu Baolu <baolu.lu@...ux.intel.com>
To:     John Garry <john.garry@...wei.com>, joro@...tes.org,
        will@...nel.org, dwmw2@...radead.org, robin.murphy@....com
Cc:     baolu.lu@...ux.intel.com, linux-kernel@...r.kernel.org,
        iommu@...ts.linux-foundation.org, linuxarm@...wei.com,
        thunder.leizhen@...wei.com, chenxiang66@...ilicon.com
Subject: Re: [PATCH v12 2/5] iommu: Enhance IOMMU default DMA mode build
 options

On 2021/6/11 20:20, John Garry wrote:
> +choice
> +	prompt "IOMMU default DMA mode"

This is not explicit.

How about

"IOMMU DMA default cache invalidation policy"

?

Best regards,
baolu

> +	depends on IOMMU_DMA
> +
> +	default IOMMU_DEFAULT_STRICT
> +	help
> +	  This option allows an IOMMU DMA mode to be chosen at build time, to
> +	  override the default DMA mode of each ARCH, removing the need to
> +	  pass in kernel parameters through command line. It is still possible
> +	  to provide ARCH-specific or common boot options to override this
> +	  option.
> +
> +	  If unsure, keep the default.