diff mbox series

[2/3] efi: add EFI_DEBUG_IMAGE_INFO_TABLE for debug

Message ID 20250423213145.1959046-3-paulliu@debian.org
State New
Headers show
Series efi: Add EFI Debug Support Table feature | expand

Commit Message

Ying-Chun Liu (PaulLiu) April 23, 2025, 9:31 p.m. UTC 
From: "Ying-Chun Liu (PaulLiu)" <paul.liu@linaro.org>

EFI_DEBUG_IMAGE_INFO_TABLE is used to store EFI_LOADED_IMAGE for
debug purpose. This commit adds the table to the EFI_CONFIGURATION_TABLE.

This feature is described in UEFI Spec version 2.10. Section 18.4.

Signed-off-by: Ying-Chun Liu (PaulLiu) <paul.liu@linaro.org>
Cc: Heinrich Schuchardt <xypron.glpk@gmx.de>
Cc: Ilias Apalodimas <ilias.apalodimas@linaro.org>
---
 include/efi_api.h             | 24 ++++++++++++++++++++++++
 lib/efi_loader/efi_boottime.c | 16 ++++++++++++++++
 2 files changed, 40 insertions(+)
diff mbox series

Patch

diff --git a/include/efi_api.h b/include/efi_api.h
index 5017d9037cd..0f4245091f1 100644
--- a/include/efi_api.h
+++ b/include/efi_api.h
@@ -238,6 +238,10 @@  enum efi_reset_type {
 	EFI_GUID(0xcce33c35, 0x74ac, 0x4087, 0xbc, 0xe7, \
 		 0x8b, 0x29, 0xb0, 0x2e, 0xeb, 0x27)
 
+#define EFI_DEBUG_IMAGE_INFO_TABLE_GUID \
+	EFI_GUID(0x49152e77, 0x1ada, 0x4764, 0xb7, 0xa2, \
+		 0x7a, 0xfe, 0xfe, 0xd9, 0x5e, 0x8b)
+
 struct efi_conformance_profiles_table {
 	u16 version;
 	u16 number_of_profiles;
@@ -564,6 +568,26 @@  struct efi_loaded_image {
 	efi_status_t (EFIAPI *unload)(efi_handle_t image_handle);
 };
 
+#define EFI_DEBUG_IMAGE_INFO_UPDATE_IN_PROGRESS 0x01
+#define EFI_DEBUG_IMAGE_INFO_TABLE_MODIFIED     0x02
+
+struct efi_debug_image_info_normal {
+	u32 image_info_type;
+	struct efi_loaded_image *loaded_image_protocol_instance;
+	efi_handle_t image_handle;
+};
+
+union efi_debug_image_info {
+	u32 *image_info_type;
+	struct efi_debug_image_info_normal *normal_image;
+};
+
+struct efi_debug_image_info_table_header {
+	volatile u32 update_status;
+	u32 table_size;
+	union efi_debug_image_info *efi_debug_image_info_table;
+};
+
 #define EFI_DEVICE_PATH_PROTOCOL_GUID \
 	EFI_GUID(0x09576e91, 0x6d3f, 0x11d2, \
 		 0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c
index 366bc0d2b1d..e2665459e44 100644
--- a/lib/efi_loader/efi_boottime.c
+++ b/lib/efi_loader/efi_boottime.c
@@ -4038,6 +4038,16 @@  efi_status_t efi_initialize_system_table(void)
 	return ret;
 }
 
+struct efi_debug_image_info_table_header __efi_runtime_data
+efi_m_debug_info_table_header = {
+	0,
+	0,
+	NULL
+};
+
+const efi_guid_t efi_debug_image_info_table_guid =
+	EFI_DEBUG_IMAGE_INFO_TABLE_GUID;
+
 /**
  * efi_initialize_system_table() - Initialize system table
  *
@@ -4053,6 +4063,8 @@  efi_status_t efi_initialize_system_table_pointer(void)
 	u64 addr;
 	u64 aligned_addr;
 	u32 crc32_value;
+	efi_guid_t debug_image_info_table_guid =
+		efi_debug_image_info_table_guid;
 
 	/* Allocate configuration table array */
 	ret = efi_allocate_pages(EFI_ALLOCATE_ANY_PAGES,
@@ -4077,5 +4089,9 @@  efi_status_t efi_initialize_system_table_pointer(void)
 			    (const unsigned char *)systab_pointer,
 			    sizeof(struct efi_system_table_pointer));
 	systab_pointer->crc32 = crc32_value;
+
+	ret = efi_install_configuration_table(&debug_image_info_table_guid,
+					      &efi_m_debug_info_table_header);
+
 	return ret;
 }