Re: [Xen-devel] [PATCH V2 7/25] tools/libacpi: Add new fields in acpi_config for DMAR table

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Wed, Aug 09, 2017 at 04:34:08PM -0400, Lan Tianyu wrote:
> From: Chao Gao <chao.gao@xxxxxxxxx>
> 
> The BIOS reports the remapping hardware units in a platform to system software
> through the DMA Remapping Reporting (DMAR) ACPI table.
> New fields are introduces for DMAR table. These new fields are set by
> toolstack through parsing guest's config file. construct_dmar() is added to
> build DMAR table according to the new fields.
> 
> Signed-off-by: Chao Gao <chao.gao@xxxxxxxxx>
> Signed-off-by: Lan Tianyu <tianyu.lan@xxxxxxxxx>
> ---
>  tools/libacpi/build.c   | 57 
> +++++++++++++++++++++++++++++++++++++++++++++++++
>  tools/libacpi/libacpi.h |  9 ++++++++
>  2 files changed, 66 insertions(+)
> 
> diff --git a/tools/libacpi/build.c b/tools/libacpi/build.c
> index f9881c9..c7cc784 100644
> --- a/tools/libacpi/build.c
> +++ b/tools/libacpi/build.c
> @@ -28,6 +28,10 @@
>  
>  #define ACPI_MAX_SECONDARY_TABLES 16
>  
> +#define VTD_HOST_ADDRESS_WIDTH 39
> +#define I440_PSEUDO_BUS_PLATFORM 0xff
> +#define I440_PSEUDO_DEVFN_IOAPIC 0x0

I have some stupid questions. What are these I440 values? Where do they
come from?

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