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| author | joe <37425738+JoeLopez333@users.noreply.github.com> | 2023-07-24 10:19:22 -0700 |
|---|---|---|
| committer | mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> | 2024-08-04 09:21:06 +0000 |
| commit | 5ff99e0dabefea14b04e190c1659f4817fcb7bc0 (patch) | |
| tree | e547729b949c8c4e9aceb6d7b5b0cc4c867fac14 /MdePkg | |
| parent | 159f1aee56d270d2575e50eb2af077abe182fc9b (diff) | |
| download | edk2-5ff99e0dabefea14b04e190c1659f4817fcb7bc0.tar.gz edk2-5ff99e0dabefea14b04e190c1659f4817fcb7bc0.tar.bz2 edk2-5ff99e0dabefea14b04e190c1659f4817fcb7bc0.zip | |
MdePkg /IoRemappingTable: Define additional IORT SMMUv3 node flags.
The flag for HTTU override in an SMMUv3 node in the IORT table is
defined in MdePkg/Include/IndustryStandard/IoRemappingTable.h as
a single bit. BIT0 or BIT1. The implementation of this field is
actually two bits, with the following mapings:
0b0000: Hardware update of the Access flag and dirty state are not
supported.
0b0001: Support for hardware update of the Access flag for Block and
Page descriptors.
0b0010: As 0b0001, and adds support for hardware update of the Access
flag for Block and Page descriptors. Hardware update of dirty state is
supported.
Referenced in Arm® System Memory Management Unit Architecture Specification
SMMU architecture version 3:
https://documentation-service.arm.com/static/63d7a2d5e4378a55c5e045b9
Signed-off-by: Aaron Pop <aaronpop@microsoft.com>
Diffstat (limited to 'MdePkg')
| -rw-r--r-- | MdePkg/Include/IndustryStandard/IoRemappingTable.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/MdePkg/Include/IndustryStandard/IoRemappingTable.h b/MdePkg/Include/IndustryStandard/IoRemappingTable.h index 7900bb5bbd..851ce00cb8 100644 --- a/MdePkg/Include/IndustryStandard/IoRemappingTable.h +++ b/MdePkg/Include/IndustryStandard/IoRemappingTable.h @@ -61,7 +61,8 @@ #define EFI_ACPI_IORT_SMMUv1v2_INT_FLAG_EDGE 0x1
#define EFI_ACPI_IORT_SMMUv3_FLAG_COHAC_OVERRIDE BIT0
-#define EFI_ACPI_IORT_SMMUv3_FLAG_HTTU_OVERRIDE BIT1
+#define EFI_ACPI_IORT_SMMUv3_FLAG_HTTU_OVERRIDE BIT1 // HW update of Access Flag supported
+#define EFI_ACPI_IORT_SMMUv3_FLAG_HTTU_OVERRIDE_DS BIT2 // HW update of Access Flag + Dirty Flag supported
#define EFI_ACPI_IORT_SMMUv3_FLAG_PROXIMITY_DOMAIN BIT3
#define EFI_ACPI_IORT_SMMUv3_FLAG_DEVICEID_VALID BIT4
|