bloblist: add blob type for DT overlay

Add blob type for DT overlay according to the update of Firmware
Handoff spec[1].
Add an inline header to represent the 'subtype' in a DT overlay
blob payload.

[1] Add Transfer Entry for Devicetree Overlay
https://github.com/FirmwareHandoff/firmware_handoff/pull/74

Signed-off-by: Raymond Mao <raymond.mao@linaro.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
Tested-by: Michal Simek <michal.simek@amd.com>
This commit is contained in:
Raymond Mao 2025-07-18 07:16:14 -07:00 committed by Tom Rini
parent fcc60481ae
commit 9d89fc4054
2 changed files with 13 additions and 1 deletions

View File

@ -43,6 +43,7 @@ static struct tag_name {
{ BLOBLISTT_ACPI_TABLES, "ACPI tables for x86" },
{ BLOBLISTT_TPM_EVLOG, "TPM event log defined by TCG EFI" },
{ BLOBLISTT_TPM_CRB_BASE, "TPM Command Response Buffer address" },
{ BLOBLISTT_FDT_OVERLAY, "DT overlay" },
/* BLOBLISTT_AREA_FIRMWARE */
{ BLOBLISTT_TPM2_TCG_LOG, "TPM v2 log space" },

View File

@ -110,7 +110,8 @@ enum bloblist_tag_t {
BLOBLISTT_ACPI_TABLES = 4,
BLOBLISTT_TPM_EVLOG = 5,
BLOBLISTT_TPM_CRB_BASE = 6,
BLOBLISTT_ACPI_PP = 7,
BLOBLISTT_FDT_OVERLAY = 7,
BLOBLISTT_ACPI_PP = 8,
/* Standard area to allocate blobs used across firmware components */
BLOBLISTT_AREA_FIRMWARE = 0x10,
@ -231,6 +232,16 @@ enum {
BLOBLIST_REC_HDR_SIZE = sizeof(struct bloblist_rec),
};
/*
* struct dto_blob_hdr - Blob inline header for BLOBLISTT_FDT_OVERLAY
*
* @subtype: IMP-DEF per the agreement between the DT overlay producer and
* consumer. Default value is 0.
*/
struct dto_blob_hdr {
u64 subtype;
};
/**
* bloblist_check_magic() - return a bloblist if the magic matches
*