lib/coreboot_table: optional UEFI capsules support

Add weak lb_uefi_capsules() to be used to optionally add LB_TAG_CAPSULE entries to coreboot table. Change-Id: Ic4161e9c6fb503463efa30674af0b3e6ad845456 Signed-off-by: Sergii Dmytruk <[email protected]>
Dasharo · May 18, 2024 · 45984e8 · 45984e8
1 parent ce0e69f
commit 45984e8
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diff --git a/src/commonlib/include/commonlib/coreboot_tables.h b/src/commonlib/include/commonlib/coreboot_tables.h
@@ -88,6 +88,7 @@ enum {
 	LB_TAG_ACPI_RSDP		= 0x0043,
 	LB_TAG_PCIE			= 0x0044,
 	LB_TAG_LOGO			= 0x00a0,
+	LB_TAG_CAPSULE			= 0x00b0,  /* far from upstream values */
 	/* The following options are CMOS-related */
 	LB_TAG_CMOS_OPTION_TABLE	= 0x00c8,
 	LB_TAG_OPTION			= 0x00c9,

diff --git a/src/include/boot/coreboot_tables.h b/src/include/boot/coreboot_tables.h
@@ -27,6 +27,9 @@ enum cb_err fill_lb_pcie(struct lb_pcie *pcie);
 /* Define this in mainboard.c to add board-specific table entries. */
 void lb_board(struct lb_header *header);
 
+/* Define this somewhere to add LB_TAG_CAPSULE table entries. */
+void lb_uefi_capsules(struct lb_header *header);
+
 /* Define this function to fill in the frame buffer returning 0 on success and
    < 0 on error. */
 int fill_lb_framebuffer(struct lb_framebuffer *framebuffer);

diff --git a/src/lib/coreboot_table.c b/src/lib/coreboot_table.c
@@ -402,6 +402,8 @@ static void lb_record_version_timestamp(struct lb_header *header)
 
 void __weak lb_board(struct lb_header *header) { /* NOOP */ }
 
+void __weak lb_uefi_capsules(struct lb_header *header) { /* NOOP */ }
+
 /*
  * It's possible that the system is using a SPI flash as the boot device,
  * however it is not probing for devices to fill in specifics. In that
@@ -573,6 +575,9 @@ static uintptr_t write_coreboot_table(uintptr_t rom_table_end)
 	/* Add board-specific table entries, if any. */
 	lb_board(head);
 
+	/* Possibly add UEFI capsules. */
+	lb_uefi_capsules(head);
+
 	if (CONFIG(CHROMEOS_RAMOOPS))
 		lb_ramoops(head);