From 5ff99e0dabefea14b04e190c1659f4817fcb7bc0 Mon Sep 17 00:00:00 2001 From: joe <37425738+JoeLopez333@users.noreply.github.com> Date: Mon, 24 Jul 2023 10:19:22 -0700 Subject: MdePkg /IoRemappingTable: Define additional IORT SMMUv3 node flags. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 --- MdePkg/Include/IndustryStandard/IoRemappingTable.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) 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 -- cgit v1.2.3