leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

iommu/vt-d: Add new enum value and structure for SATC

Browse Source 
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 ATS for normal device operation. It
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.chen@intel.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Link: https://lore.kernel.org/r/20210203093329.1617808-1-baolu.lu@linux.intel.com
Link: https://lore.kernel.org/r/20210204014401.2846425-6-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Yian Chen 2021-02-04 09:43:59 +08:00 committed by Joerg Roedel
parent 933fcd01e9
commit 81d3c75bb3
1 changed files with 10 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
include/acpi/actbl1.h
View File

@ -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 /* 6 and greater are reserved */
};
/* DMAR Device Scope structure */
@ -607,6 +608,14 @@ struct acpi_dmar_andd {
char device_name[1];
};
/* 5: SOC Integrated Address Translation Cache Reporting Structure */
struct acpi_dmar_satc {
struct acpi_dmar_header header;
u8 flags;
u8 reserved;
u16 segment;
};
/*******************************************************************************
*
* DRTM - Dynamic Root of Trust for Measurement table