Re: [Xen-devel] [PATCH v3 09/14] AMD/IOMMU: split amd_iommu_init_one()

["Woods, Brian" <Brian.Woods@xxxxxxx>]

On Tue, Jul 16, 2019 at 04:39:10PM +0000, Jan Beulich wrote:
> Mapping the MMIO space and obtaining feature information needs to happen
> slightly earlier, such that for x2APIC support we can set XTEn prior to
> calling amd_iommu_update_ivrs_mapping_acpi() and
> amd_iommu_setup_ioapic_remapping().
> 
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
> Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

Acked-by: Brian Woods <brian.woods@xxxxxxx>

> --- a/xen/drivers/passthrough/amd/iommu_init.c
> +++ b/xen/drivers/passthrough/amd/iommu_init.c
> @@ -970,14 +970,6 @@ static void * __init allocate_ppr_log(st
>   
>   static int __init amd_iommu_init_one(struct amd_iommu *iommu)
>   {
> -    if ( map_iommu_mmio_region(iommu) != 0 )
> -        goto error_out;
> -
> -    get_iommu_features(iommu);
> -
> -    if ( iommu->features.raw )
> -        iommuv2_enabled = 1;
> -
>       if ( allocate_cmd_buffer(iommu) == NULL )
>           goto error_out;
>   
> @@ -1202,6 +1194,23 @@ static bool_t __init amd_sp5100_erratum2
>       return 0;
>   }
>   
> +static int __init amd_iommu_prepare_one(struct amd_iommu *iommu)
> +{
> +    int rc = alloc_ivrs_mappings(iommu->seg);
> +
> +    if ( !rc )
> +        rc = map_iommu_mmio_region(iommu);
> +    if ( rc )
> +        return rc;
> +
> +    get_iommu_features(iommu);
> +
> +    if ( iommu->features.raw )
> +        iommuv2_enabled = true;
> +
> +    return 0;
> +}
> +
>   int __init amd_iommu_init(void)
>   {
>       struct amd_iommu *iommu;
> @@ -1232,7 +1241,7 @@ int __init amd_iommu_init(void)
>       radix_tree_init(&ivrs_maps);
>       for_each_amd_iommu ( iommu )
>       {
> -        rc = alloc_ivrs_mappings(iommu->seg);
> +        rc = amd_iommu_prepare_one(iommu);
>           if ( rc )
>               goto error_out;
>       }
> 

-- 
Brian Woods

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