linux-kernel - Re: [PATCH 3/3] iommu/vt-d: Add build dependency on IOASID

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Date:   Fri, 20 Mar 2020 21:57:43 +0800
From:   Lu Baolu <baolu.lu@...ux.intel.com>
To:     Jacob Pan <jacob.jun.pan@...ux.intel.com>,
        LKML <linux-kernel@...r.kernel.org>,
        iommu@...ts.linux-foundation.org, Joerg Roedel <joro@...tes.org>,
        David Woodhouse <dwmw2@...radead.org>
Cc:     baolu.lu@...ux.intel.com, Raj Ashok <ashok.raj@...el.com>,
        Yi Liu <yi.l.liu@...el.com>
Subject: Re: [PATCH 3/3] iommu/vt-d: Add build dependency on IOASID

On 2020/3/20 12:32, Jacob Pan wrote:
> IOASID code is needed by VT-d scalable mode for PASID allocation.
> Add explicit dependency such that IOASID is built-in whenever Intel
> IOMMU is enabled.
> Otherwise, aux domain code will fail when IOMMU is built-in and IOASID
> is compiled as a module.
> 
> Signed-off-by: Jacob Pan <jacob.jun.pan@...ux.intel.com>

Fixes: 59a623374dc38 ("iommu/vt-d: Replace Intel specific PASID 
allocator with IOASID")
Acked-by: Lu Baolu <baolu.lu@...ux.intel.com>

Best regards,
baolu

> ---
>   drivers/iommu/Kconfig | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig
> index d2fade984999..25149544d57c 100644
> --- a/drivers/iommu/Kconfig
> +++ b/drivers/iommu/Kconfig
> @@ -188,6 +188,7 @@ config INTEL_IOMMU
>   	select NEED_DMA_MAP_STATE
>   	select DMAR_TABLE
>   	select SWIOTLB
> +	select IOASID
>   	help
>   	  DMA remapping (DMAR) devices support enables independent address
>   	  translations for Direct Memory Access (DMA) from devices.
>