Re: [PATCH v2 1/2] hw/arm/smmu-common: Support 64-bit addresses

[Eric Auger <eric.auger@redhat.com>]

Hi Jean,

On 2/14/23 18:19, Jean-Philippe Brucker wrote:
> Addresses targeting the second translation table (TTB1) in the SMMU have
> all upper bits set. Ensure the IOMMU region covers all 64 bits.
>
> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
> Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
Reviewed-by: Eric Auger <eric.auger@redhat.com>

Thanks

Eric
> ---
>  include/hw/arm/smmu-common.h | 2 --
>  hw/arm/smmu-common.c         | 2 +-
>  2 files changed, 1 insertion(+), 3 deletions(-)
>
> diff --git a/include/hw/arm/smmu-common.h b/include/hw/arm/smmu-common.h
> index c5683af07d..9fcff26357 100644
> --- a/include/hw/arm/smmu-common.h
> +++ b/include/hw/arm/smmu-common.h
> @@ -27,8 +27,6 @@
>  #define SMMU_PCI_DEVFN_MAX    256
>  #define SMMU_PCI_DEVFN(sid)   (sid & 0xFF)
>  
> -#define SMMU_MAX_VA_BITS      48
> -
>  /*
>   * Page table walk error types
>   */
> diff --git a/hw/arm/smmu-common.c b/hw/arm/smmu-common.c
> index 733c964778..2b8c67b9a1 100644
> --- a/hw/arm/smmu-common.c
> +++ b/hw/arm/smmu-common.c
> @@ -439,7 +439,7 @@ static AddressSpace *smmu_find_add_as(PCIBus *bus, void *opaque, int devfn)
>  
>          memory_region_init_iommu(&sdev->iommu, sizeof(sdev->iommu),
>                                   s->mrtypename,
> -                                 OBJECT(s), name, 1ULL << SMMU_MAX_VA_BITS);
> +                                 OBJECT(s), name, UINT64_MAX);
>          address_space_init(&sdev->as,
>                             MEMORY_REGION(&sdev->iommu), name);
>          trace_smmu_add_mr(name);