On Tue, Feb 02, 2021 at 12:40:55PM +0800, Lu Baolu wrote:
> From: Yian Chen <yian.c...@intel.com>
>
> Starting from Intel Platform VT-d v3.2, BIOS may provide new remapping
> structure SATC for SOC integrated devices, according to section 8.8 of
> Intel VT-d architecture specification v3.2. The SATC structure reports
> a list of the devices that require SATC enabling via ATS capacity.
nit: s/require SATC/require ATS for normal device operation. This is a
functional requirement that these devices will not work without OS enabling
ATS capability.
>
> This patch introduces the new enum value and structure to represent the
> remapping information. Kernel should parse the information from the
> reporting structure and enable ATC for the devices as needed.
>
> Signed-off-by: Yian Chen <yian.c...@intel.com>
> ---
> include/acpi/actbl1.h | 11 ++++++++++-
> 1 file changed, 10 insertions(+), 1 deletion(-)
>
> diff --git a/include/acpi/actbl1.h b/include/acpi/actbl1.h
> index 43549547ed3e..b7ca802b66d2 100644
> --- a/include/acpi/actbl1.h
> +++ b/include/acpi/actbl1.h
> @@ -514,7 +514,8 @@ enum acpi_dmar_type {
> ACPI_DMAR_TYPE_ROOT_ATS = 2,
> ACPI_DMAR_TYPE_HARDWARE_AFFINITY = 3,
> ACPI_DMAR_TYPE_NAMESPACE = 4,
> - ACPI_DMAR_TYPE_RESERVED = 5 /* 5 and greater are reserved */
> + ACPI_DMAR_TYPE_SATC = 5,
> + ACPI_DMAR_TYPE_RESERVED = 6 /* 5 and greater are reserved */
> };
>
Think Joerg spotted the comment update.
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