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vboot: move to region_devices 

Now that vboot is using offsets for everything remove the
pass through vboot_get_region() and use region_devices
as first class citizens.

Change-Id: I1a86f3725e5bce38e6ca31e9641b1a8f4ac50e96
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/10225
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
This commit is contained in:
Aaron Durbin 2015-05-15 23:25:46 -05:00
parent 0424c95a6d
commit 4e50cdd979
7 changed files with 105 additions and 131 deletions
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28
src/vendorcode/google/chromeos/vbnv_flash.c
View File

@ -19,8 +19,6 @@
* TODO: Make this CAR-friendly in case we use it on x86 some day.
*/
#include <cbfs.h>
#include <cbfs_core.h>
#include <console/console.h>
#include <spi_flash.h>
#include <string.h>
@ -32,7 +30,7 @@
#define BLOB_SIZE VB2_NVDATA_SIZE
/* FMAP descriptor of the NVRAM area */
static struct region nvram_region;
static struct region_device nvram_region;
/* offset of the current nvdata in SPI flash */
static int blob_offset = -1;
@ -73,8 +71,8 @@ static int init_vbnv(void)
int offset;
int i;
vboot_locate_region("RW_NVRAM", &nvram_region);
if (region_sz(&nvram_region) < BLOB_SIZE) {
if (vboot_named_region_device("RW_NVRAM", &nvram_region) ||
region_device_sz(&nvram_region) < BLOB_SIZE) {
printk(BIOS_ERR, "%s: failed to locate NVRAM\n", __func__);
return 1;
}
@ -83,8 +81,8 @@ static int init_vbnv(void)
for (i = 0; i < BLOB_SIZE; i++)
empty_blob[i] = erase_value();
offset = region_offset(&nvram_region);
top_offset = offset + region_sz(&nvram_region) - BLOB_SIZE;
offset = 0;
top_offset = region_device_sz(&nvram_region) - BLOB_SIZE;
/*
* after the loop, offset is supposed to point the blob right before
@ -92,8 +90,8 @@ static int init_vbnv(void)
* empty blob, or the base of the region if the nvram has never been
* used.
*/
for (i = offset; i <= top_offset; i += BLOB_SIZE) {
if (vboot_get_region(i, BLOB_SIZE, buf) == NULL) {
for (i = 0; i <= top_offset; i += BLOB_SIZE) {
if (rdev_readat(&nvram_region, buf, i, BLOB_SIZE) < 0) {
printk(BIOS_ERR, "failed to read nvdata\n");
return 1;
}
@ -103,7 +101,7 @@ static int init_vbnv(void)
}
/* reread the nvdata and write it to the cache */
if (vboot_get_region(offset, BLOB_SIZE, cache) == NULL) {
if (rdev_readat(&nvram_region, cache, offset, BLOB_SIZE) < 0) {
printk(BIOS_ERR, "failed to read nvdata\n");
return 1;
}
@ -130,8 +128,8 @@ static int erase_nvram(void)
if (vbnv_flash_probe())
return 1;
if (spi_flash->erase(spi_flash, region_offset(&nvram_region),
region_sz(&nvram_region))) {
if (spi_flash->erase(spi_flash, region_device_offset(&nvram_region),
region_device_sz(&nvram_region))) {
printk(BIOS_ERR, "failed to erase nvram\n");
return 1;
}
@ -171,14 +169,16 @@ void save_vbnv(const uint8_t *vbnv_copy)
if (new_offset > top_offset) {
if (erase_nvram())
return; /* error */
new_offset = region_offset(&nvram_region);
new_offset = 0;
}
break;
}
}
if (!vbnv_flash_probe() &&
!spi_flash->write(spi_flash, new_offset, BLOB_SIZE, vbnv_copy)) {
!spi_flash->write(spi_flash,
region_device_offset(&nvram_region) + new_offset,
BLOB_SIZE, vbnv_copy)) {
/* write was successful. safely move pointer forward */
blob_offset = new_offset;
memcpy(cache, vbnv_copy, BLOB_SIZE);

18
src/vendorcode/google/chromeos/vboot2/misc.h
View File

@ -46,18 +46,22 @@ struct vb2_working_data * const vboot_get_working_data(void);
size_t vb2_working_data_size(void);
void *vboot_get_work_buffer(struct vb2_working_data *wd);
static inline void vb2_get_selected_region(struct vb2_working_data *wd,
struct region *region)
/* Returns 0 on success. < 0 on failure. */
static inline int vb2_get_selected_region(struct vb2_working_data *wd,
struct region_device *rdev)
{
region->offset = wd->selected_region_offset;
region->size = wd->selected_region_size;
struct region reg = {
.offset = wd->selected_region_offset,
.size = wd->selected_region_size,
};
return vboot_region_device(&reg, rdev);
}
static inline void vb2_set_selected_region(struct vb2_working_data *wd,
struct region *region)
struct region_device *rdev)
{
wd->selected_region_offset = region_offset(region);
wd->selected_region_size = region_sz(region);
wd->selected_region_offset = region_device_offset(rdev);
wd->selected_region_size = region_device_sz(rdev);
}
static inline int vboot_is_slot_selected(struct vb2_working_data *wd)

19
src/vendorcode/google/chromeos/vboot2/vboot_handoff.c
View File

@ -127,8 +127,9 @@ void vboot_fill_handoff(void)
int i;
struct vboot_handoff *vh;
struct vb2_shared_data *sd;
struct region fw_main;
struct region_device fw_main;
struct vboot_components *fw_info;
size_t metadata_sz;
struct vb2_working_data *wd = vboot_get_working_data();
sd = vboot_get_work_buffer(wd);
@ -151,15 +152,23 @@ void vboot_fill_handoff(void)
if (vboot_is_readonly_path(wd))
return;
vb2_get_selected_region(wd, &fw_main);
fw_info = vboot_locate_components(&fw_main);
if (vb2_get_selected_region(wd, &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_offset(&fw_main) + fw_info->entries[i].offset;
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);
}

69
src/vendorcode/google/chromeos/vboot2/vboot_loader.c
View File

@ -25,6 +25,7 @@
#include <rules.h>
#include <string.h>
#include "misc.h"
#include "../vboot_handoff.h"
#include "../symbols.h"
/* The stage loading code is compiled and entered from multiple stages. The
@ -121,10 +122,11 @@ static int vboot_loader_active(struct prog *prog)
if (IS_ENABLED(CONFIG_MULTIPLE_CBFS_INSTANCES) &&
run_verification) {
/* RW A or B */
struct region fw_main;
struct region_device fw_main;
vb2_get_selected_region(wd, &fw_main);
cbfs_set_header_offset(region_offset(&fw_main));
if (vb2_get_selected_region(wd, &fw_main))
die("failed to reference selected region\n");
cbfs_set_header_offset(region_device_offset(&fw_main));
}
return 1;
}
@ -132,25 +134,35 @@ static int vboot_loader_active(struct prog *prog)
return 0;
}
static int vboot_fw_region(int fw_index, struct region *fw_main,
struct vboot_components *fw_info,
struct region *fc)
static int vboot_fw_region(int fw_index, const struct region_device *fw_main,
struct region_device *fw)
{
size_t fw_main_end;
size_t fc_end;
struct vboot_components *fw_info;
size_t metadata_sz;
size_t offset;
size_t size;
if (fw_index >= fw_info->num_components) {
printk(BIOS_INFO, "invalid stage index: %d\n", fw_index);
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;
}
fc->offset = region_offset(fw_main) + fw_info->entries[fw_index].offset;
fc->size = fw_info->entries[fw_index].size;
if (fw_index >= fw_info->num_components) {
printk(BIOS_INFO, "invalid stage index: %d\n", fw_index);
rdev_munmap(fw_main, fw_info);
return -1;
}
fw_main_end = region_offset(fw_main) + region_sz(fw_main);
fc_end = region_offset(fc) + region_sz(fc);
offset = fw_info->entries[fw_index].offset;
size = fw_info->entries[fw_index].size;
rdev_munmap(fw_main, fw_info);
if (region_sz(fc) == 0 || fc_end > fw_main_end) {
if (rdev_chain(fw, fw_main, offset, size)) {
printk(BIOS_INFO, "invalid stage address or size\n");
return -1;
}
@ -163,8 +175,7 @@ static int vboot_fw_region(int fw_index, struct region *fw_main,
static int vboot_prepare(struct prog *prog)
{
struct vb2_working_data *wd;
struct region fw_main;
struct vboot_components *fw_info;
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
@ -198,29 +209,26 @@ static int vboot_prepare(struct prog *prog)
}
wd = vboot_get_working_data();
vb2_get_selected_region(wd, &fw_main);
fw_info = vboot_locate_components(&fw_main);
if (fw_info == NULL)
die("failed to locate firmware components\n");
if (vb2_get_selected_region(wd, &fw_main))
die("failed to reference selected region\n");
/* Load payload in ramstage. */
if (ENV_RAMSTAGE) {
struct region payload;
struct region_device payload;
void *payload_ptr;
if (vboot_fw_region(CONFIG_VBOOT_BOOT_LOADER_INDEX,
&fw_main, fw_info, &payload))
&fw_main, &payload))
die("Couldn't load payload.");
payload_ptr = vboot_get_region(region_offset(&payload),
region_sz(&payload), NULL);
payload_ptr = rdev_mmap_full(&payload);
if (payload_ptr == NULL)
die("Couldn't load payload.");
prog_set_area(prog, payload_ptr, region_sz(&payload));
prog_set_area(prog, payload_ptr, region_device_sz(&payload));
} else {
struct region stage;
struct region_device stage;
int stage_index = 0;
if (prog->type == PROG_ROMSTAGE)
@ -230,7 +238,7 @@ static int vboot_prepare(struct prog *prog)
else
die("Invalid program type for vboot.");
if (vboot_fw_region(stage_index, &fw_main, fw_info, &stage))
if (vboot_fw_region(stage_index, &fw_main, &stage))
die("Vboot stage load failed.");
if (ENV_ROMSTAGE && IS_ENABLED(CONFIG_RELOCATABLE_RAMSTAGE)) {
@ -240,8 +248,7 @@ static int vboot_prepare(struct prog *prog)
.prog = prog,
};
stage_ptr = vboot_get_region(region_offset(&stage),
region_sz(&stage), NULL);
stage_ptr = rdev_mmap_full(&stage);
if (stage_ptr == NULL)
die("Vboot couldn't load stage.");
@ -249,7 +256,7 @@ static int vboot_prepare(struct prog *prog)
if (rmodule_stage_load(&rmod_ram, stage_ptr))
die("Vboot couldn't load stage");
} else {
size_t offset = region_offset(&stage);
size_t offset = region_device_offset(&stage);
if (cbfs_load_prog_stage_by_offset(CBFS_DEFAULT_MEDIA,
prog, offset))

43
src/vendorcode/google/chromeos/vboot2/verstage.c
View File

@ -67,27 +67,28 @@ int vb2ex_read_resource(struct vb2_context *ctx,
void *buf,
uint32_t size)
{
struct region region;
struct region_device rdev;
const char *name;
switch (index) {
case VB2_RES_GBB:
vboot_locate_region("GBB", &region);
name = "GBB";
break;
case VB2_RES_FW_VBLOCK:
if (is_slot_a(ctx))
vboot_locate_region("VBLOCK_A", &region);
name = "VBLOCK_A";
else
vboot_locate_region("VBLOCK_B", &region);
name = "VBLOCK_B";
break;
default:
return VB2_ERROR_EX_READ_RESOURCE_INDEX;
}
if (offset + size > region_sz(&region))
if (vboot_named_region_device(name, &rdev))
return VB2_ERROR_EX_READ_RESOURCE_SIZE;
if (vboot_get_region(region_offset(&region) + offset, size, buf) == NULL)
return VB2_ERROR_UNKNOWN;
if (rdev_readat(&rdev, buf, offset, size) != size)
return VB2_ERROR_EX_READ_RESOURCE_SIZE;
return VB2_SUCCESS;
}
@ -114,7 +115,7 @@ int vb2ex_hwcrypto_digest_finalize(uint8_t *digest, uint32_t digest_size)
return VB2_ERROR_UNKNOWN;
}
static int hash_body(struct vb2_context *ctx, struct region *fw_main)
static int hash_body(struct vb2_context *ctx, struct region_device *fw_main)
{
uint64_t load_ts;
uint32_t expected_size;
@ -132,8 +133,8 @@ static int hash_body(struct vb2_context *ctx, struct region *fw_main)
load_ts = timestamp_get();
timestamp_add(TS_START_HASH_BODY, load_ts);
expected_size = region_sz(fw_main);
offset = region_offset(fw_main);
expected_size = region_device_sz(fw_main);
offset = 0;
/* Start the body hash */
rv = vb2api_init_hash(ctx, VB2_HASH_TAG_FW_BODY, &expected_size);
@ -143,17 +144,15 @@ static int hash_body(struct vb2_context *ctx, struct region *fw_main)
/* Extend over the body */
while (expected_size) {
uint64_t temp_ts;
void *b;
if (block_size > expected_size)
block_size = expected_size;
temp_ts = timestamp_get();
b = vboot_get_region(offset, block_size, block);
if (b == NULL)
if (rdev_readat(fw_main, block, offset, block_size) < 0)
return VB2_ERROR_UNKNOWN;
load_ts += timestamp_get() - temp_ts;
rv = vb2api_extend_hash(ctx, b, block_size);
rv = vb2api_extend_hash(ctx, block, block_size);
if (rv)
return rv;
@ -174,17 +173,17 @@ static int hash_body(struct vb2_context *ctx, struct region *fw_main)
return VB2_SUCCESS;
}
static int locate_firmware(struct vb2_context *ctx, struct region *fw_main)
static int locate_firmware(struct vb2_context *ctx,
struct region_device *fw_main)
{
const char *name;
if (is_slot_a(ctx))
vboot_locate_region("FW_MAIN_A", fw_main);
name = "FW_MAIN_A";
else
vboot_locate_region("FW_MAIN_B", fw_main);
name = "FW_MAIN_B";
if (region_sz(fw_main) == 0)
return 1;
return 0;
return vboot_named_region_device(name, fw_main);
}
/**
@ -219,7 +218,7 @@ static uint32_t extend_pcrs(struct vb2_context *ctx)
void verstage_main(void)
{
struct vb2_context ctx;
struct region fw_main;
struct region_device fw_main;
struct vb2_working_data *wd = vboot_get_working_data();
int rv;
timestamp_add_now(TS_START_VBOOT);

45
src/vendorcode/google/chromeos/vboot_common.c
View File

@ -31,34 +31,14 @@
#include "vboot_common.h"
#include "vboot_handoff.h"
void vboot_locate_region(const char *name, struct region *region)
int vboot_named_region_device(const char *name, struct region_device *rdev)
{
if (fmap_locate_area(name, region))
region->size = 0;
return fmap_locate_area_as_rdev(name, rdev);
}
void *vboot_get_region(size_t offset, size_t size, void *dest)
int vboot_region_device(const struct region *reg, struct region_device *rdev)
{
const struct region_device *boot_dev;
struct region_device rdev;
boot_device_init();
boot_dev = boot_device_ro();
if (boot_dev == NULL)
return NULL;
if (rdev_chain(&rdev, boot_dev, offset, size))
return NULL;
/* Each call will leak a mapping. */
if (dest == NULL)
return rdev_mmap_full(&rdev);
if (rdev_readat(&rdev, dest, 0, size) != size)
return NULL;
return dest;
return boot_device_ro_subregion(reg, rdev);
}
int vboot_get_handoff_info(void **addr, uint32_t *size)
@ -75,23 +55,6 @@ int vboot_get_handoff_info(void **addr, uint32_t *size)
return 0;
}
/* This will leak a mapping of a fw region */
struct vboot_components *vboot_locate_components(struct region *region)
{
size_t req_size;
struct vboot_components *vbc;
req_size = sizeof(*vbc);
req_size += sizeof(struct vboot_component_entry) *
MAX_PARSED_FW_COMPONENTS;
vbc = vboot_get_region(region_offset(region), req_size, NULL);
if (vbc && vbc->num_components > MAX_PARSED_FW_COMPONENTS)
vbc = NULL;
return vbc;
}
void vboot_reboot(void)
{
if (IS_ENABLED(CONFIG_CONSOLE_CBMEM_DUMP_TO_UART))

14
src/vendorcode/google/chromeos/vboot_common.h
View File

@ -36,16 +36,8 @@ struct vboot_components {
struct vboot_component_entry entries[0];
} __attribute__((packed));
void vboot_locate_region(const char *name, struct region *region);
struct vboot_components *vboot_locate_components(struct region *region);
/*
* This is a dual purpose routine. If dest is non-NULL the region at
* offset_addr will be read into the area pointed to by dest. If dest
* is NULL,the region will be mapped to a memory location. NULL is
* returned on error else the location of the requested region.
*/
void *vboot_get_region(size_t offset, size_t size, void *dest);
/* The following functions return 0 on success, < 0 on error. */
int vboot_named_region_device(const char *name, struct region_device *rdev);
int vboot_region_device(const struct region *reg, struct region_device *rdev);
#endif /* VBOOT_COMMON_H */