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authorAaron Durbin <adurbin@chromium.org>2015-12-08 17:00:23 -0600
committerAaron Durbin <adurbin@chromium.org>2015-12-10 04:43:58 +0100
commit6d720f38e06d14cc8a89635f66dc124dcd5ac150 (patch)
tree874aecaf8f35d8db1740dabc7735e3e44cb9ca5e /src/vendorcode/google
parentbf3dbaf86d033becc231a48612d474fac9add1ee (diff)
downloadcoreboot-6d720f38e06d14cc8a89635f66dc124dcd5ac150.tar.xz
cbfs/vboot: remove firmware component support
The Chrome OS verified boot path supported multiple CBFS instances in the boot media as well as stand-alone assets sitting in each vboot RW slot. Remove the support for the stand-alone assets and always use CBFS accesses as the way to retrieve data. This is implemented by adding a cbfs_locator object which is queried for locating the current CBFS. Additionally, it is also signalled prior to when a program is about to be loaded by coreboot for the subsequent stage/payload. This provides the same opportunity as previous for vboot to hook in and perform its logic. BUG=chromium:445938 BRANCH=None TEST=Built and ran on glados. CQ-DEPEND=CL:307121,CL:31691,CL:31690 Change-Id: I6a3a15feb6edd355d6ec252c36b6f7885b383099 Signed-off-by: Aaron Durbin <adurbin@chromium.org> Reviewed-on: https://review.coreboot.org/12689 Tested-by: build bot (Jenkins) Tested-by: Raptor Engineering Automated Test Stand <noreply@raptorengineeringinc.com> Reviewed-by: Patrick Georgi <pgeorgi@google.com> Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Diffstat (limited to 'src/vendorcode/google')
-rw-r--r--src/vendorcode/google/chromeos/Kconfig1
-rw-r--r--src/vendorcode/google/chromeos/vboot2/Kconfig51
-rw-r--r--src/vendorcode/google/chromeos/vboot2/common.c24
-rw-r--r--src/vendorcode/google/chromeos/vboot2/misc.h7
-rw-r--r--src/vendorcode/google/chromeos/vboot2/vboot_handoff.c31
-rw-r--r--src/vendorcode/google/chromeos/vboot2/vboot_loader.c130
-rw-r--r--src/vendorcode/google/chromeos/vboot2/vboot_logic.c2
-rw-r--r--src/vendorcode/google/chromeos/vboot_handoff.h18
8 files changed, 62 insertions, 202 deletions
diff --git a/src/vendorcode/google/chromeos/Kconfig b/src/vendorcode/google/chromeos/Kconfig
index aae611cde2..87fc024b61 100644
--- a/src/vendorcode/google/chromeos/Kconfig
+++ b/src/vendorcode/google/chromeos/Kconfig
@@ -28,6 +28,7 @@ config CHROMEOS
select ELOG if SPI_FLASH
select COLLECT_TIMESTAMPS
select VBOOT_VERIFY_FIRMWARE
+ select MULTIPLE_CBFS_INSTANCES
help
Enable ChromeOS specific features like the GPIO sub table in
the coreboot table. NOTE: Enabling this option on an unsupported
diff --git a/src/vendorcode/google/chromeos/vboot2/Kconfig b/src/vendorcode/google/chromeos/vboot2/Kconfig
index 66659ddad1..7580d8d50c 100644
--- a/src/vendorcode/google/chromeos/vboot2/Kconfig
+++ b/src/vendorcode/google/chromeos/vboot2/Kconfig
@@ -68,57 +68,6 @@ config CHIPSET_PROVIDES_VERSTAGE_MAIN_SYMBOL
help
The chipset code provides their own main() entry point.
-# These VBOOT_X_INDEX are the position of X in FW_MAIN_A/B region. The index
-# table is created by cros_bundle_firmware at build time based on the positions
-# of the blobs listed in fmap.dts and stored at the top of FW_MAIN_A/B region.
-# Unfortunately, there is no programmatical link between the blob list and the
-# index number here.
-config VBOOT_ROMSTAGE_INDEX
- hex "Romstage component index"
- default 2
- depends on VBOOT_VERIFY_FIRMWARE
- help
- This is the index of the romstage component in the verified
- firmware block.
-
-config VBOOT_RAMSTAGE_INDEX
- hex "Ramstage component index"
- default 1
- depends on VBOOT_VERIFY_FIRMWARE
- help
- This is the index of the ramstage component in the verified
- firmware block.
-
-config VBOOT_REFCODE_INDEX
- hex "Reference code firmware index"
- default 1
- depends on VBOOT_VERIFY_FIRMWARE
- help
- This is the index of the reference code component in the verified
- firmware block.
-
-config VBOOT_BOOT_LOADER_INDEX
- hex "Bootloader component index"
- default 0
- depends on VBOOT_VERIFY_FIRMWARE
- help
- This is the index of the bootloader component in the verified
- firmware block.
-
-config VBOOT_SECURE_OS_INDEX
- hex "ARM64 Secure OS index"
- default 0x5
- depends on VBOOT_VERIFY_FIRMWARE
- help
- Secure OS software component used on ARM64 machines.
-
-config VBOOT_BL31_INDEX
- hex "ARM64 BL31 index"
- default 0x4
- depends on VBOOT_VERIFY_FIRMWARE
- help
- This is the index of the BL31 program on ARM64 machines.
-
config VBOOT_DYNAMIC_WORK_BUFFER
bool "Vboot's work buffer is dynamically allocated."
default y if ARCH_ROMSTAGE_X86_32 && !SEPARATE_VERSTAGE
diff --git a/src/vendorcode/google/chromeos/vboot2/common.c b/src/vendorcode/google/chromeos/vboot2/common.c
index fbad1126f8..4282408535 100644
--- a/src/vendorcode/google/chromeos/vboot2/common.c
+++ b/src/vendorcode/google/chromeos/vboot2/common.c
@@ -115,21 +115,27 @@ struct vb2_shared_data *vb2_get_shared_data(void)
return (void *)((uintptr_t)wd + wd->buffer_offset);
}
-int vb2_get_selected_region(struct region_device *rdev)
+int vb2_get_selected_region(struct region *region)
{
const struct selected_region *reg = vb2_selected_region();
- struct region region = {
- .offset = reg->offset,
- .size = reg->size,
- };
- return vboot_region_device(&region, rdev);
+
+ if (reg == NULL)
+ return -1;
+
+ if (reg->offset == 0 && reg->size == 0)
+ return -1;
+
+ region->offset = reg->offset;
+ region->size = reg->size;
+
+ return 0;
}
-void vb2_set_selected_region(struct region_device *rdev)
+void vb2_set_selected_region(const struct region *region)
{
struct selected_region *reg = vb2_selected_region();
- reg->offset = region_device_offset(rdev);
- reg->size = region_device_sz(rdev);
+ reg->offset = region_offset(region);
+ reg->size = region_sz(region);
}
int vboot_is_slot_selected(void)
diff --git a/src/vendorcode/google/chromeos/vboot2/misc.h b/src/vendorcode/google/chromeos/vboot2/misc.h
index 75874c86b8..fc9d2547cb 100644
--- a/src/vendorcode/google/chromeos/vboot2/misc.h
+++ b/src/vendorcode/google/chromeos/vboot2/misc.h
@@ -22,16 +22,13 @@ struct vb2_context;
struct vb2_shared_data;
void vboot_fill_handoff(void);
-void *vboot_load_stage(int stage_index,
- struct region *fw_main,
- struct vboot_components *fw_info);
void vb2_init_work_context(struct vb2_context *ctx);
struct vb2_shared_data *vb2_get_shared_data(void);
/* Returns 0 on success. < 0 on failure. */
-int vb2_get_selected_region(struct region_device *rdev);
-void vb2_set_selected_region(struct region_device *rdev);
+int vb2_get_selected_region(struct region *region);
+void vb2_set_selected_region(const struct region *region);
int vboot_is_slot_selected(void);
int vboot_is_readonly_path(void);
diff --git a/src/vendorcode/google/chromeos/vboot2/vboot_handoff.c b/src/vendorcode/google/chromeos/vboot2/vboot_handoff.c
index dc3515f459..246aefecee 100644
--- a/src/vendorcode/google/chromeos/vboot2/vboot_handoff.c
+++ b/src/vendorcode/google/chromeos/vboot2/vboot_handoff.c
@@ -120,12 +120,8 @@ static void fill_vboot_handoff(struct vboot_handoff *vboot_handoff,
void vboot_fill_handoff(void)
{
- int i;
struct vboot_handoff *vh;
struct vb2_shared_data *sd;
- struct region_device fw_main;
- struct vboot_components *fw_info;
- size_t metadata_sz;
sd = vb2_get_shared_data();
sd->workbuf_hash_offset = 0;
@@ -142,33 +138,6 @@ void vboot_fill_handoff(void)
/* needed until we finish transtion to vboot2 for kernel verification */
fill_vboot_handoff(vh, sd);
-
- /* Nothing left to do in readonly path. */
- if (vboot_is_readonly_path())
- return;
-
- if (IS_ENABLED(CONFIG_MULTIPLE_CBFS_INSTANCES))
- return;
-
- if (vb2_get_selected_region(&fw_main))
- die("No component metadata.\n");
-
- metadata_sz = sizeof(*fw_info);
- metadata_sz += MAX_PARSED_FW_COMPONENTS * sizeof(fw_info->entries[0]);
-
- fw_info = rdev_mmap(&fw_main, 0, metadata_sz);
-
- if (fw_info == NULL)
- die("failed to locate firmware components\n");
-
- /* these offset & size are used to load a rw boot loader */
- for (i = 0; i < fw_info->num_components; i++) {
- vh->components[i].address = region_device_offset(&fw_main);
- vh->components[i].address += fw_info->entries[i].offset;
- vh->components[i].size = fw_info->entries[i].size;
- }
-
- rdev_munmap(&fw_main, fw_info);
}
/*
diff --git a/src/vendorcode/google/chromeos/vboot2/vboot_loader.c b/src/vendorcode/google/chromeos/vboot2/vboot_loader.c
index b5570dd7ca..5fdd0261cf 100644
--- a/src/vendorcode/google/chromeos/vboot2/vboot_loader.c
+++ b/src/vendorcode/google/chromeos/vboot2/vboot_loader.c
@@ -13,7 +13,7 @@
* GNU General Public License for more details.
*/
-#include <assets.h>
+#include <arch/early_variables.h>
#include <cbfs.h>
#include <cbmem.h>
#include <console/console.h>
@@ -59,7 +59,34 @@ static int verstage_should_load(void)
return 0;
}
-static int vboot_active(struct asset *asset)
+static int vboot_executed CAR_GLOBAL;
+
+static int vboot_logic_executed(void)
+{
+ /* If this stage is supposed to run the vboot logic ensure it has been
+ * executed. */
+ if (verification_should_run() && car_get_var(vboot_executed))
+ return 1;
+
+ /* If this stage is supposed to load verstage and verstage is returning
+ * back to the calling stage check that it has been executed. */
+ if (verstage_should_load() && IS_ENABLED(CONFIG_RETURN_FROM_VERSTAGE))
+ if (car_get_var(vboot_executed))
+ return 1;
+
+ /* Handle all other stages post vboot execution. */
+ if (!ENV_BOOTBLOCK) {
+ if (IS_ENABLED(CONFIG_VBOOT_STARTS_IN_BOOTBLOCK))
+ return 1;
+ if (IS_ENABLED(CONFIG_VBOOT_STARTS_IN_ROMSTAGE) &&
+ !ENV_ROMSTAGE)
+ return 1;
+ }
+
+ return 0;
+}
+
+static void vboot_prepare(void)
{
int run_verification;
@@ -67,6 +94,7 @@ static int vboot_active(struct asset *asset)
if (run_verification) {
verstage_main();
+ car_set_var(vboot_executed, 1);
} else if (verstage_should_load()) {
struct cbfsf file;
struct prog verstage =
@@ -91,7 +119,9 @@ static int vboot_active(struct asset *asset)
* runtime, but this provides a hint to the compiler for dead
* code elimination below. */
if (!IS_ENABLED(CONFIG_RETURN_FROM_VERSTAGE))
- return 0;
+ return;
+
+ car_set_var(vboot_executed, 1);
}
/*
@@ -106,103 +136,27 @@ static int vboot_active(struct asset *asset)
vb2_store_selected_region();
vboot_fill_handoff();
}
-
- return vboot_is_slot_selected();
}
-static int vboot_locate_by_components(const struct region_device *fw_main,
- struct asset *asset)
+static int vboot_locate(struct cbfs_props *props)
{
- struct vboot_components *fw_info;
- size_t metadata_sz;
- size_t offset;
- size_t size;
- struct region_device *fw = asset_rdev(asset);
- int fw_index = 0;
-
- if (asset_type(asset) == ASSET_ROMSTAGE)
- fw_index = CONFIG_VBOOT_ROMSTAGE_INDEX;
- else if (asset_type(asset) == ASSET_RAMSTAGE)
- fw_index = CONFIG_VBOOT_RAMSTAGE_INDEX;
- else if (asset_type(asset) == ASSET_PAYLOAD)
- fw_index = CONFIG_VBOOT_BOOT_LOADER_INDEX;
- else if (asset_type(asset) == ASSET_REFCODE)
- fw_index = CONFIG_VBOOT_REFCODE_INDEX;
- else if (asset_type(asset) == ASSET_BL31)
- fw_index = CONFIG_VBOOT_BL31_INDEX;
- else
- die("Invalid program type for vboot.");
-
- metadata_sz = sizeof(*fw_info);
- metadata_sz += MAX_PARSED_FW_COMPONENTS * sizeof(fw_info->entries[0]);
-
- fw_info = rdev_mmap(fw_main, 0, metadata_sz);
-
- if (fw_info == NULL) {
- printk(BIOS_INFO, "No component metadata.\n");
- return -1;
- }
+ struct region selected_region;
- if (fw_index >= fw_info->num_components) {
- printk(BIOS_INFO, "invalid index: %d\n", fw_index);
- rdev_munmap(fw_main, fw_info);
+ /* Don't honor vboot results until the vboot logic has run. */
+ if (!vboot_logic_executed())
return -1;
- }
-
- offset = fw_info->entries[fw_index].offset;
- size = fw_info->entries[fw_index].size;
- rdev_munmap(fw_main, fw_info);
- if (rdev_chain(fw, fw_main, offset, size)) {
- printk(BIOS_INFO, "invalid offset or size\n");
+ if (vb2_get_selected_region(&selected_region))
return -1;
- }
- return 0;
-}
-
-static int vboot_locate_by_multi_cbfs(const struct region_device *fw_main,
- struct asset *asset)
-{
- struct cbfsf file;
-
- if (cbfs_locate(&file, fw_main, asset_name(asset), NULL))
- return -1;
-
- cbfs_file_data(asset_rdev(asset), &file);
+ props->offset = region_offset(&selected_region);
+ props->size = region_sz(&selected_region);
return 0;
}
-static int vboot_asset_locate(const struct region_device *fw_main,
- struct asset *asset)
-{
- if (IS_ENABLED(CONFIG_MULTIPLE_CBFS_INSTANCES))
- return vboot_locate_by_multi_cbfs(fw_main, asset);
- else
- return vboot_locate_by_components(fw_main, asset);
-}
-
-/* This function is only called when vboot_active() returns 1. That
- * means we are taking vboot paths. */
-static int vboot_locate(struct asset *asset)
-{
- struct region_device fw_main;
-
- /* Code size optimization. We'd never actually get called under the
- * followin cirumstances because verstage was loaded and ran -- never
- * returning. */
- if (verstage_should_load() && !IS_ENABLED(CONFIG_RETURN_FROM_VERSTAGE))
- return 0;
-
- if (vb2_get_selected_region(&fw_main))
- die("failed to reference selected region\n");
-
- return vboot_asset_locate(&fw_main, asset);
-}
-
-const struct asset_provider vboot_provider = {
+const struct cbfs_locator vboot_locator = {
.name = "VBOOT",
- .is_active = vboot_active,
+ .prepare = vboot_prepare,
.locate = vboot_locate,
};
diff --git a/src/vendorcode/google/chromeos/vboot2/vboot_logic.c b/src/vendorcode/google/chromeos/vboot2/vboot_logic.c
index c580829d52..b72de93245 100644
--- a/src/vendorcode/google/chromeos/vboot2/vboot_logic.c
+++ b/src/vendorcode/google/chromeos/vboot2/vboot_logic.c
@@ -323,6 +323,6 @@ void verstage_main(void)
}
printk(BIOS_INFO, "Slot %c is selected\n", is_slot_a(&ctx) ? 'A' : 'B');
- vb2_set_selected_region(&fw_main);
+ vb2_set_selected_region(region_device_region(&fw_main));
timestamp_add_now(TS_END_VBOOT);
}
diff --git a/src/vendorcode/google/chromeos/vboot_handoff.h b/src/vendorcode/google/chromeos/vboot_handoff.h
index 4b88e829a6..f06044403d 100644
--- a/src/vendorcode/google/chromeos/vboot_handoff.h
+++ b/src/vendorcode/google/chromeos/vboot_handoff.h
@@ -22,29 +22,13 @@
#include "vboot_common.h"
/*
- * The vboot handoff structure keeps track of a maximum number of firmware
- * components in the verfieid RW area of flash. This is not a restriction on
- * the number of components packed in a firmware block. It's only the maximum
- * number of parsed firmware components (address and size) included in the
- * handoff structure.
- */
-#define MAX_PARSED_FW_COMPONENTS 6
-
-struct firmware_component {
- uint32_t address;
- uint32_t size;
-} __attribute__((packed));
-
-/*
* The vboot_handoff structure contains the data to be consumed by downstream
* firmware after firmware selection has been completed. Namely it provides
- * vboot shared data as well as the flags from VbInit. As noted above a finite
- * number of components are parsed from the verfieid firmare region.
+ * vboot shared data as well as the flags from VbInit.
*/
struct vboot_handoff {
VbInitParams init_params;
uint32_t selected_firmware;
- struct firmware_component components[MAX_PARSED_FW_COMPONENTS];
char shared_data[VB_SHARED_DATA_MIN_SIZE];
} __attribute__((packed));