libreboot/resources/depthcharge/patch/0005-Proper-firmware-index-report-for-read-only-boot-path.patch

From dce70fb042d91ba74359a6dfb519f31d77e2c328 Mon Sep 17 00:00:00 2001
From: Paul Kocialkowski <contact@paulk.fr>
Date: Mon, 10 Aug 2015 20:24:50 +0200
Subject: [PATCH 5/7] Proper firmware index report for read-only boot path

When booting from a read-only boot path, the active firmware to report is RO.
This is detected with the lack of a vboot handoff pointer.

Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
---
 src/vboot/crossystem/fdt.c | 2 +-
 src/vboot/firmware_id.c    | 6 +++++-
 src/vboot/firmware_id.h    | 1 +
 3 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/vboot/crossystem/fdt.c b/src/vboot/crossystem/fdt.c
index ca39dac..a79b192 100644
--- a/src/vboot/crossystem/fdt.c
+++ b/src/vboot/crossystem/fdt.c
@@ -73,7 +73,7 @@ static int install_crossystem_data(DeviceTreeFixup *fixup, DeviceTree *tree)
 				nvstorage_flash_get_blob_size());
 	}
 
-	int fw_index = vdat->firmware_index;
+	int fw_index = get_active_fw_index(vdat);
 	const char *fwid;
 	int fwid_size;
 
diff --git a/src/vboot/firmware_id.c b/src/vboot/firmware_id.c
index 3662921..955bc84 100644
--- a/src/vboot/firmware_id.c
+++ b/src/vboot/firmware_id.c
@@ -36,6 +36,7 @@ static struct fwid {
 } fw_fmap_ops[] = {
 	{VDAT_RW_A, "RW_FWID_A", NULL, 0, "RW A: ID NOT FOUND"},
 	{VDAT_RW_B, "RW_FWID_B", NULL, 0, "RW B: ID NOT FOUND"},
+	{VDAT_RO, "RO_FRID", NULL, 0, "RO: ID NOT FOUND"},
 	{VDAT_RECOVERY, "RO_FRID", NULL, 0, "RO: ID NOT FOUND"},
 };
 
@@ -130,10 +131,13 @@ static VbSharedDataHeader *get_vdat(void)
 	return NULL;
 }
 
-static inline int get_active_fw_index(VbSharedDataHeader *vdat)
+int get_active_fw_index(VbSharedDataHeader *vdat)
 {
 	int fw_index = VDAT_UNKNOWN;
 
+	if (lib_sysinfo.vboot_handoff == NULL)
+		return VDAT_RO;
+
 	if (vdat)
 		fw_index = vdat->firmware_index;
 
diff --git a/src/vboot/firmware_id.h b/src/vboot/firmware_id.h
index fb6f206..090e9d1 100644
--- a/src/vboot/firmware_id.h
+++ b/src/vboot/firmware_id.h
@@ -49,6 +49,7 @@ int get_rwb_fw_size(void);
  * Get firmware details for currently active fw type. It looks up vdat,
  * identifies fw_index and returns appropriate id and size for that index.
  */
+int get_active_fw_index(VbSharedDataHeader *vdat);
 const char *get_active_fw_id(void);
 int get_active_fw_size(void);
 
-- 
1.9.1