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-rw-r--r--cmd/bootefi.c658
1 files changed, 93 insertions, 565 deletions
diff --git a/cmd/bootefi.c b/cmd/bootefi.c
index 20e5c94a33a..9cf9027bf40 100644
--- a/cmd/bootefi.c
+++ b/cmd/bootefi.c
@@ -7,543 +7,23 @@
#define LOG_CATEGORY LOGC_EFI
-#include <common.h>
-#include <bootm.h>
-#include <charset.h>
#include <command.h>
-#include <dm.h>
+#include <efi.h>
#include <efi_loader.h>
-#include <efi_selftest.h>
-#include <env.h>
-#include <errno.h>
-#include <image.h>
+#include <exports.h>
#include <log.h>
#include <malloc.h>
-#include <asm/global_data.h>
-#include <linux/libfdt.h>
-#include <linux/libfdt_env.h>
#include <mapmem.h>
-#include <memalign.h>
+#include <vsprintf.h>
#include <asm-generic/sections.h>
-#include <linux/linkage.h>
+#include <asm/global_data.h>
+#include <linux/string.h>
DECLARE_GLOBAL_DATA_PTR;
-static struct efi_device_path *bootefi_image_path;
-static struct efi_device_path *bootefi_device_path;
-static void *image_addr;
-static size_t image_size;
-
-/**
- * efi_get_image_parameters() - return image parameters
- *
- * @img_addr: address of loaded image in memory
- * @img_size: size of loaded image
- */
-void efi_get_image_parameters(void **img_addr, size_t *img_size)
-{
- *img_addr = image_addr;
- *img_size = image_size;
-}
-
-/**
- * efi_clear_bootdev() - clear boot device
- */
-static void efi_clear_bootdev(void)
-{
- efi_free_pool(bootefi_device_path);
- efi_free_pool(bootefi_image_path);
- bootefi_device_path = NULL;
- bootefi_image_path = NULL;
- image_addr = NULL;
- image_size = 0;
-}
-
-/**
- * efi_set_bootdev() - set boot device
- *
- * This function is called when a file is loaded, e.g. via the 'load' command.
- * We use the path to this file to inform the UEFI binary about the boot device.
- *
- * @dev: device, e.g. "MMC"
- * @devnr: number of the device, e.g. "1:2"
- * @path: path to file loaded
- * @buffer: buffer with file loaded
- * @buffer_size: size of file loaded
- */
-void efi_set_bootdev(const char *dev, const char *devnr, const char *path,
- void *buffer, size_t buffer_size)
-{
- struct efi_device_path *device, *image;
- efi_status_t ret;
-
- log_debug("dev=%s, devnr=%s, path=%s, buffer=%p, size=%zx\n", dev,
- devnr, path, buffer, buffer_size);
-
- /* Forget overwritten image */
- if (buffer + buffer_size >= image_addr &&
- image_addr + image_size >= buffer)
- efi_clear_bootdev();
-
- /* Remember only PE-COFF and FIT images */
- if (efi_check_pe(buffer, buffer_size, NULL) != EFI_SUCCESS) {
- if (IS_ENABLED(CONFIG_FIT) &&
- !fit_check_format(buffer, IMAGE_SIZE_INVAL)) {
- /*
- * FIT images of type EFI_OS are started via command
- * bootm. We should not use their boot device with the
- * bootefi command.
- */
- buffer = 0;
- buffer_size = 0;
- } else {
- log_debug("- not remembering image\n");
- return;
- }
- }
-
- /* efi_set_bootdev() is typically called repeatedly, recover memory */
- efi_clear_bootdev();
-
- image_addr = buffer;
- image_size = buffer_size;
-
- ret = efi_dp_from_name(dev, devnr, path, &device, &image);
- if (ret == EFI_SUCCESS) {
- bootefi_device_path = device;
- if (image) {
- /* FIXME: image should not contain device */
- struct efi_device_path *image_tmp = image;
-
- efi_dp_split_file_path(image, &device, &image);
- efi_free_pool(image_tmp);
- }
- bootefi_image_path = image;
- log_debug("- boot device %pD\n", device);
- if (image)
- log_debug("- image %pD\n", image);
- } else {
- log_debug("- efi_dp_from_name() failed, err=%lx\n", ret);
- efi_clear_bootdev();
- }
-}
-
-/**
- * efi_env_set_load_options() - set load options from environment variable
- *
- * @handle: the image handle
- * @env_var: name of the environment variable
- * @load_options: pointer to load options (output)
- * Return: status code
- */
-static efi_status_t efi_env_set_load_options(efi_handle_t handle,
- const char *env_var,
- u16 **load_options)
-{
- const char *env = env_get(env_var);
- size_t size;
- u16 *pos;
- efi_status_t ret;
-
- *load_options = NULL;
- if (!env)
- return EFI_SUCCESS;
- size = sizeof(u16) * (utf8_utf16_strlen(env) + 1);
- pos = calloc(size, 1);
- if (!pos)
- return EFI_OUT_OF_RESOURCES;
- *load_options = pos;
- utf8_utf16_strcpy(&pos, env);
- ret = efi_set_load_options(handle, size, *load_options);
- if (ret != EFI_SUCCESS) {
- free(*load_options);
- *load_options = NULL;
- }
- return ret;
-}
-
-#if !CONFIG_IS_ENABLED(GENERATE_ACPI_TABLE)
-
-/**
- * copy_fdt() - Copy the device tree to a new location available to EFI
- *
- * The FDT is copied to a suitable location within the EFI memory map.
- * Additional 12 KiB are added to the space in case the device tree needs to be
- * expanded later with fdt_open_into().
- *
- * @fdtp: On entry a pointer to the flattened device tree.
- * On exit a pointer to the copy of the flattened device tree.
- * FDT start
- * Return: status code
- */
-static efi_status_t copy_fdt(void **fdtp)
-{
- unsigned long fdt_ram_start = -1L, fdt_pages;
- efi_status_t ret = 0;
- void *fdt, *new_fdt;
- u64 new_fdt_addr;
- uint fdt_size;
- int i;
-
- for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
- u64 ram_start = gd->bd->bi_dram[i].start;
- u64 ram_size = gd->bd->bi_dram[i].size;
-
- if (!ram_size)
- continue;
-
- if (ram_start < fdt_ram_start)
- fdt_ram_start = ram_start;
- }
-
- /*
- * Give us at least 12 KiB of breathing room in case the device tree
- * needs to be expanded later.
- */
- fdt = *fdtp;
- fdt_pages = efi_size_in_pages(fdt_totalsize(fdt) + 0x3000);
- fdt_size = fdt_pages << EFI_PAGE_SHIFT;
-
- ret = efi_allocate_pages(EFI_ALLOCATE_ANY_PAGES,
- EFI_ACPI_RECLAIM_MEMORY, fdt_pages,
- &new_fdt_addr);
- if (ret != EFI_SUCCESS) {
- log_err("ERROR: Failed to reserve space for FDT\n");
- goto done;
- }
- new_fdt = (void *)(uintptr_t)new_fdt_addr;
- memcpy(new_fdt, fdt, fdt_totalsize(fdt));
- fdt_set_totalsize(new_fdt, fdt_size);
-
- *fdtp = (void *)(uintptr_t)new_fdt_addr;
-done:
- return ret;
-}
-
-/**
- * get_config_table() - get configuration table
- *
- * @guid: GUID of the configuration table
- * Return: pointer to configuration table or NULL
- */
-static void *get_config_table(const efi_guid_t *guid)
-{
- size_t i;
-
- for (i = 0; i < systab.nr_tables; i++) {
- if (!guidcmp(guid, &systab.tables[i].guid))
- return systab.tables[i].table;
- }
- return NULL;
-}
-
-#endif /* !CONFIG_IS_ENABLED(GENERATE_ACPI_TABLE) */
-
-/**
- * efi_install_fdt() - install device tree
- *
- * If fdt is not EFI_FDT_USE_INTERNAL, the device tree located at that memory
- * address will will be installed as configuration table, otherwise the device
- * tree located at the address indicated by environment variable fdt_addr or as
- * fallback fdtcontroladdr will be used.
- *
- * On architectures using ACPI tables device trees shall not be installed as
- * configuration table.
- *
- * @fdt: address of device tree or EFI_FDT_USE_INTERNAL to use the
- * the hardware device tree as indicated by environment variable
- * fdt_addr or as fallback the internal device tree as indicated by
- * the environment variable fdtcontroladdr
- * Return: status code
- */
-efi_status_t efi_install_fdt(void *fdt)
-{
- /*
- * The EBBR spec requires that we have either an FDT or an ACPI table
- * but not both.
- */
-#if CONFIG_IS_ENABLED(GENERATE_ACPI_TABLE)
- if (fdt) {
- log_warning("WARNING: Can't have ACPI table and device tree - ignoring DT.\n");
- return EFI_SUCCESS;
- }
-#else
- struct bootm_headers img = { 0 };
- efi_status_t ret;
-
- if (fdt == EFI_FDT_USE_INTERNAL) {
- const char *fdt_opt;
- uintptr_t fdt_addr;
-
- /* Look for device tree that is already installed */
- if (get_config_table(&efi_guid_fdt))
- return EFI_SUCCESS;
- /* Check if there is a hardware device tree */
- fdt_opt = env_get("fdt_addr");
- /* Use our own device tree as fallback */
- if (!fdt_opt) {
- fdt_opt = env_get("fdtcontroladdr");
- if (!fdt_opt) {
- log_err("ERROR: need device tree\n");
- return EFI_NOT_FOUND;
- }
- }
- fdt_addr = hextoul(fdt_opt, NULL);
- if (!fdt_addr) {
- log_err("ERROR: invalid $fdt_addr or $fdtcontroladdr\n");
- return EFI_LOAD_ERROR;
- }
- fdt = map_sysmem(fdt_addr, 0);
- }
-
- /* Install device tree */
- if (fdt_check_header(fdt)) {
- log_err("ERROR: invalid device tree\n");
- return EFI_LOAD_ERROR;
- }
-
- /* Prepare device tree for payload */
- ret = copy_fdt(&fdt);
- if (ret) {
- log_err("ERROR: out of memory\n");
- return EFI_OUT_OF_RESOURCES;
- }
-
- if (image_setup_libfdt(&img, fdt, 0, NULL)) {
- log_err("ERROR: failed to process device tree\n");
- return EFI_LOAD_ERROR;
- }
-
- /* Create memory reservations as indicated by the device tree */
- efi_carve_out_dt_rsv(fdt);
-
- efi_try_purge_kaslr_seed(fdt);
-
- if (CONFIG_IS_ENABLED(EFI_TCG2_PROTOCOL_MEASURE_DTB)) {
- ret = efi_tcg2_measure_dtb(fdt);
- if (ret == EFI_SECURITY_VIOLATION) {
- log_err("ERROR: failed to measure DTB\n");
- return ret;
- }
- }
-
- /* Install device tree as UEFI table */
- ret = efi_install_configuration_table(&efi_guid_fdt, fdt);
- if (ret != EFI_SUCCESS) {
- log_err("ERROR: failed to install device tree\n");
- return ret;
- }
-#endif /* GENERATE_ACPI_TABLE */
-
- return EFI_SUCCESS;
-}
-
-/**
- * do_bootefi_exec() - execute EFI binary
- *
- * The image indicated by @handle is started. When it returns the allocated
- * memory for the @load_options is freed.
- *
- * @handle: handle of loaded image
- * @load_options: load options
- * Return: status code
- *
- * Load the EFI binary into a newly assigned memory unwinding the relocation
- * information, install the loaded image protocol, and call the binary.
- */
-static efi_status_t do_bootefi_exec(efi_handle_t handle, void *load_options)
-{
- efi_status_t ret;
- efi_uintn_t exit_data_size = 0;
- u16 *exit_data = NULL;
-
- /* On ARM switch from EL3 or secure mode to EL2 or non-secure mode */
- switch_to_non_secure_mode();
-
- /*
- * The UEFI standard requires that the watchdog timer is set to five
- * minutes when invoking an EFI boot option.
- *
- * Unified Extensible Firmware Interface (UEFI), version 2.7 Errata A
- * 7.5. Miscellaneous Boot Services - EFI_BOOT_SERVICES.SetWatchdogTimer
- */
- ret = efi_set_watchdog(300);
- if (ret != EFI_SUCCESS) {
- log_err("ERROR: Failed to set watchdog timer\n");
- goto out;
- }
-
- /* Call our payload! */
- ret = EFI_CALL(efi_start_image(handle, &exit_data_size, &exit_data));
- if (ret != EFI_SUCCESS) {
- log_err("## Application failed, r = %lu\n",
- ret & ~EFI_ERROR_MASK);
- if (exit_data) {
- log_err("## %ls\n", exit_data);
- efi_free_pool(exit_data);
- }
- }
-
- efi_restore_gd();
-
-out:
- free(load_options);
-
- if (IS_ENABLED(CONFIG_EFI_LOAD_FILE2_INITRD)) {
- if (efi_initrd_deregister() != EFI_SUCCESS)
- log_err("Failed to remove loadfile2 for initrd\n");
- }
-
- /* Control is returned to U-Boot, disable EFI watchdog */
- efi_set_watchdog(0);
+static struct efi_device_path *test_image_path;
+static struct efi_device_path *test_device_path;
- return ret;
-}
-
-/**
- * do_efibootmgr() - execute EFI boot manager
- *
- * Return: status code
- */
-static int do_efibootmgr(void)
-{
- efi_handle_t handle;
- efi_status_t ret;
- void *load_options;
-
- ret = efi_bootmgr_load(&handle, &load_options);
- if (ret != EFI_SUCCESS) {
- log_notice("EFI boot manager: Cannot load any image\n");
- return CMD_RET_FAILURE;
- }
-
- ret = do_bootefi_exec(handle, load_options);
-
- if (ret != EFI_SUCCESS)
- return CMD_RET_FAILURE;
-
- return CMD_RET_SUCCESS;
-}
-
-/**
- * do_bootefi_image() - execute EFI binary
- *
- * Set up memory image for the binary to be loaded, prepare device path, and
- * then call do_bootefi_exec() to execute it.
- *
- * @image_opt: string with image start address
- * @size_opt: string with image size or NULL
- * Return: status code
- */
-static int do_bootefi_image(const char *image_opt, const char *size_opt)
-{
- void *image_buf;
- unsigned long addr, size;
- efi_status_t ret;
-
-#ifdef CONFIG_CMD_BOOTEFI_HELLO
- if (!strcmp(image_opt, "hello")) {
- image_buf = __efi_helloworld_begin;
- size = __efi_helloworld_end - __efi_helloworld_begin;
- efi_clear_bootdev();
- } else
-#endif
- {
- addr = strtoul(image_opt, NULL, 16);
- /* Check that a numeric value was passed */
- if (!addr)
- return CMD_RET_USAGE;
- image_buf = map_sysmem(addr, 0);
-
- if (size_opt) {
- size = strtoul(size_opt, NULL, 16);
- if (!size)
- return CMD_RET_USAGE;
- efi_clear_bootdev();
- } else {
- if (image_buf != image_addr) {
- log_err("No UEFI binary known at %s\n",
- image_opt);
- return CMD_RET_FAILURE;
- }
- size = image_size;
- }
- }
- ret = efi_run_image(image_buf, size);
-
- if (ret != EFI_SUCCESS)
- return CMD_RET_FAILURE;
-
- return CMD_RET_SUCCESS;
-}
-
-/**
- * efi_run_image() - run loaded UEFI image
- *
- * @source_buffer: memory address of the UEFI image
- * @source_size: size of the UEFI image
- * Return: status code
- */
-efi_status_t efi_run_image(void *source_buffer, efi_uintn_t source_size)
-{
- efi_handle_t mem_handle = NULL, handle;
- struct efi_device_path *file_path = NULL;
- struct efi_device_path *msg_path;
- efi_status_t ret, ret2;
- u16 *load_options;
-
- if (!bootefi_device_path || !bootefi_image_path) {
- log_debug("Not loaded from disk\n");
- /*
- * Special case for efi payload not loaded from disk,
- * such as 'bootefi hello' or for example payload
- * loaded directly into memory via JTAG, etc:
- */
- file_path = efi_dp_from_mem(EFI_RESERVED_MEMORY_TYPE,
- (uintptr_t)source_buffer,
- source_size);
- /*
- * Make sure that device for device_path exist
- * in load_image(). Otherwise, shell and grub will fail.
- */
- ret = efi_install_multiple_protocol_interfaces(&mem_handle,
- &efi_guid_device_path,
- file_path, NULL);
- if (ret != EFI_SUCCESS)
- goto out;
- msg_path = file_path;
- } else {
- file_path = efi_dp_append(bootefi_device_path,
- bootefi_image_path);
- msg_path = bootefi_image_path;
- log_debug("Loaded from disk\n");
- }
-
- log_info("Booting %pD\n", msg_path);
-
- ret = EFI_CALL(efi_load_image(false, efi_root, file_path, source_buffer,
- source_size, &handle));
- if (ret != EFI_SUCCESS) {
- log_err("Loading image failed\n");
- goto out;
- }
-
- /* Transfer environment variable as load options */
- ret = efi_env_set_load_options(handle, "bootargs", &load_options);
- if (ret != EFI_SUCCESS)
- goto out;
-
- ret = do_bootefi_exec(handle, load_options);
-
-out:
- ret2 = efi_uninstall_multiple_protocol_interfaces(mem_handle,
- &efi_guid_device_path,
- file_path, NULL);
- efi_free_pool(file_path);
- return (ret != EFI_SUCCESS) ? ret : ret2;
-}
-
-#ifdef CONFIG_CMD_BOOTEFI_SELFTEST
static efi_status_t bootefi_run_prepare(const char *load_options_path,
struct efi_device_path *device_path,
struct efi_device_path *image_path,
@@ -585,23 +65,26 @@ static efi_status_t bootefi_test_prepare
efi_status_t ret;
/* Construct a dummy device path */
- bootefi_device_path = efi_dp_from_mem(EFI_RESERVED_MEMORY_TYPE, 0, 0);
- if (!bootefi_device_path)
+ test_device_path = efi_dp_from_mem(EFI_RESERVED_MEMORY_TYPE, 0, 0);
+ if (!test_device_path)
return EFI_OUT_OF_RESOURCES;
- bootefi_image_path = efi_dp_from_file(NULL, path);
- if (!bootefi_image_path) {
+ test_image_path = efi_dp_from_file(NULL, path);
+ if (!test_image_path) {
ret = EFI_OUT_OF_RESOURCES;
goto failure;
}
- ret = bootefi_run_prepare(load_options_path, bootefi_device_path,
- bootefi_image_path, image_objp,
+ ret = bootefi_run_prepare(load_options_path, test_device_path,
+ test_image_path, image_objp,
loaded_image_infop);
if (ret == EFI_SUCCESS)
return ret;
failure:
+ efi_free_pool(test_device_path);
+ efi_free_pool(test_image_path);
+ /* TODO: not sure calling clear function is necessary */
efi_clear_bootdev();
return ret;
}
@@ -626,6 +109,8 @@ static int do_efi_selftest(void)
ret = EFI_CALL(efi_selftest(&image_obj->header, &systab));
efi_restore_gd();
free(loaded_image_info->load_options);
+ efi_free_pool(test_device_path);
+ efi_free_pool(test_image_path);
if (ret != EFI_SUCCESS)
efi_delete_handle(&image_obj->header);
else
@@ -633,7 +118,6 @@ static int do_efi_selftest(void)
return ret != EFI_SUCCESS;
}
-#endif /* CONFIG_CMD_BOOTEFI_SELFTEST */
/**
* do_bootefi() - execute `bootefi` command
@@ -648,20 +132,15 @@ static int do_bootefi(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
efi_status_t ret;
- char *img_addr, *img_size, *str_copy, *pos;
- void *fdt;
+ char *p;
+ void *fdt, *image_buf;
+ unsigned long addr, size;
+ void *image_addr;
+ size_t image_size;
if (argc < 2)
return CMD_RET_USAGE;
- /* Initialize EFI drivers */
- ret = efi_init_obj_list();
- if (ret != EFI_SUCCESS) {
- log_err("Error: Cannot initialize UEFI sub-system, r = %lu\n",
- ret & ~EFI_ERROR_MASK);
- return CMD_RET_FAILURE;
- }
-
if (argc > 2) {
uintptr_t fdt_addr;
@@ -670,32 +149,81 @@ static int do_bootefi(struct cmd_tbl *cmdtp, int flag, int argc,
} else {
fdt = EFI_FDT_USE_INTERNAL;
}
- ret = efi_install_fdt(fdt);
- if (ret == EFI_INVALID_PARAMETER)
- return CMD_RET_USAGE;
- else if (ret != EFI_SUCCESS)
- return CMD_RET_FAILURE;
- if (IS_ENABLED(CONFIG_CMD_BOOTEFI_BOOTMGR)) {
- if (!strcmp(argv[1], "bootmgr"))
- return do_efibootmgr();
+ if (IS_ENABLED(CONFIG_CMD_BOOTEFI_BOOTMGR) &&
+ !strcmp(argv[1], "bootmgr")) {
+ ret = efi_bootmgr_run(fdt);
+
+ if (ret == EFI_INVALID_PARAMETER)
+ return CMD_RET_USAGE;
+ else if (ret)
+ return CMD_RET_FAILURE;
+
+ return CMD_RET_SUCCESS;
}
-#ifdef CONFIG_CMD_BOOTEFI_SELFTEST
- if (!strcmp(argv[1], "selftest"))
+
+ if (IS_ENABLED(CONFIG_CMD_BOOTEFI_SELFTEST) &&
+ !strcmp(argv[1], "selftest")) {
+ /* Initialize EFI drivers */
+ ret = efi_init_obj_list();
+ if (ret != EFI_SUCCESS) {
+ log_err("Error: Cannot initialize UEFI sub-system, r = %lu\n",
+ ret & ~EFI_ERROR_MASK);
+ return CMD_RET_FAILURE;
+ }
+
+ ret = efi_install_fdt(fdt);
+ if (ret == EFI_INVALID_PARAMETER)
+ return CMD_RET_USAGE;
+ else if (ret != EFI_SUCCESS)
+ return CMD_RET_FAILURE;
+
return do_efi_selftest();
-#endif
- str_copy = strdup(argv[1]);
- if (!str_copy) {
- log_err("Out of memory\n");
- return CMD_RET_FAILURE;
}
- pos = str_copy;
- img_addr = strsep(&pos, ":");
- img_size = strsep(&pos, ":");
- ret = do_bootefi_image(img_addr, img_size);
- free(str_copy);
- return ret;
+ if (!IS_ENABLED(CONFIG_CMD_BOOTEFI_BINARY))
+ return CMD_RET_SUCCESS;
+
+ if (IS_ENABLED(CONFIG_CMD_BOOTEFI_HELLO) &&
+ !strcmp(argv[1], "hello")) {
+ image_buf = __efi_helloworld_begin;
+ size = __efi_helloworld_end - __efi_helloworld_begin;
+ /* TODO: not sure calling clear function is necessary */
+ efi_clear_bootdev();
+ } else {
+ addr = strtoul(argv[1], NULL, 16);
+ /* Check that a numeric value was passed */
+ if (!addr)
+ return CMD_RET_USAGE;
+ image_buf = map_sysmem(addr, 0);
+
+ p = strchr(argv[1], ':');
+ if (p) {
+ size = strtoul(++p, NULL, 16);
+ if (!size)
+ return CMD_RET_USAGE;
+ efi_clear_bootdev();
+ } else {
+ /* Image should be already loaded */
+ efi_get_image_parameters(&image_addr, &image_size);
+
+ if (image_buf != image_addr) {
+ log_err("No UEFI binary known at %s\n",
+ argv[1]);
+ return CMD_RET_FAILURE;
+ }
+ size = image_size;
+ }
+ }
+
+ ret = efi_binary_run(image_buf, size, fdt);
+
+ if (ret == EFI_INVALID_PARAMETER)
+ return CMD_RET_USAGE;
+ else if (ret)
+ return CMD_RET_FAILURE;
+
+ return CMD_RET_SUCCESS;
}
U_BOOT_LONGHELP(bootefi,
generated by cgit v1.2.3 (git 2.0.4) at 2025-07-25 20:37:13 +0000