linux-kernel - Re: [PATCH v12 3/5] iommu/vt-d: Add support for IOMMU default DMA mode build options

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Message-ID: <f3940a3f-d1c1-148d-e4b5-51cecf924ff5@linux.intel.com>
Date:   Sat, 12 Jun 2021 10:14:43 +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 3/5] iommu/vt-d: Add support for IOMMU default DMA
 mode build options

On 2021/6/11 20:20, John Garry wrote:
> diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig
> index 2a71347611d4..4467353f981b 100644
> --- a/drivers/iommu/Kconfig
> +++ b/drivers/iommu/Kconfig
> @@ -94,6 +94,7 @@ choice
>   	prompt "IOMMU default DMA mode"
>   	depends on IOMMU_DMA
>   
> +	default IOMMU_DEFAULT_LAZY if INTEL_IOMMU
>   	default IOMMU_DEFAULT_STRICT

If two default values are different. Which one will be overridden?

Best regards,
baolu