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// SPDX-License-Identifier: GPL-2.0+
/*
* efi_selftest_load_initrd
*
* Copyright (c) 2020 Ilias Apalodimas <ilias.apalodimas@linaro.org>
*
* This test checks the FileLoad2 protocol.
* A known file is read from the file system and verified.
*
* An example usage - given a file image with a file system in partition 1
* holding file initrd - is:
*
* * Configure the sandbox with
*
* CONFIG_EFI_SELFTEST=y
* CONFIG_EFI_LOAD_FILE2_INITRD=y
* CONFIG_EFI_INITRD_FILESPEC="host 0:1 initrd"
*
* * Run ./u-boot and execute
*
* host bind 0 image
* setenv efi_selftest load initrd
* bootefi selftest
*
* This would provide a test output like:
*
* Testing EFI API implementation
*
* Selected test: 'load initrd'
*
* Setting up 'load initrd'
* Setting up 'load initrd' succeeded
*
* Executing 'load initrd'
* Loaded 12378613 bytes
* CRC32 2997478465
*
* Now the size and CRC32 can be compared to the provided file.
*/
#include <efi_selftest.h>
#include <efi_loader.h>
#include <efi_load_initrd.h>
#include <asm/types.h>
#include <linux/string.h>
static struct efi_boot_services *boottime;
static struct efi_initrd_dp dp = {
.vendor = {
{
DEVICE_PATH_TYPE_MEDIA_DEVICE,
DEVICE_PATH_SUB_TYPE_VENDOR_PATH,
sizeof(dp.vendor),
},
EFI_INITRD_MEDIA_GUID,
},
.end = {
DEVICE_PATH_TYPE_END,
DEVICE_PATH_SUB_TYPE_END,
sizeof(dp.end),
}
};
static struct efi_initrd_dp dp_invalid = {
.vendor = {
{
DEVICE_PATH_TYPE_MEDIA_DEVICE,
DEVICE_PATH_SUB_TYPE_VENDOR_PATH,
sizeof(dp.vendor),
},
EFI_INITRD_MEDIA_GUID,
},
.end = {
0x8f, /* invalid */
0xfe, /* invalid */
sizeof(dp.end),
}
};
static int setup(const efi_handle_t handle,
const struct efi_system_table *systable)
{
boottime = systable->boottime;
return EFI_ST_SUCCESS;
}
static int execute(void)
{
efi_guid_t lf2_proto_guid = EFI_LOAD_FILE2_PROTOCOL_GUID;
struct efi_load_file_protocol *lf2;
struct efi_device_path *dp2, *dp2_invalid;
efi_status_t status;
efi_handle_t handle;
char buffer[64];
efi_uintn_t buffer_size;
void *buf;
u32 crc32;
memset(buffer, 0, sizeof(buffer));
dp2 = (struct efi_device_path *)&dp;
status = boottime->locate_device_path(&lf2_proto_guid, &dp2, &handle);
if (status != EFI_SUCCESS) {
efi_st_error("Unable to locate device path\n");
return EFI_ST_FAILURE;
}
status = boottime->handle_protocol(handle, &lf2_proto_guid,
(void **)&lf2);
if (status != EFI_SUCCESS) {
efi_st_error("Unable to locate protocol\n");
return EFI_ST_FAILURE;
}
/* Case 1:
* buffer_size can't be NULL
* protocol can't be NULL
*/
status = lf2->load_file(lf2, dp2, false, NULL, &buffer);
if (status != EFI_INVALID_PARAMETER) {
efi_st_error("Buffer size can't be NULL\n");
return EFI_ST_FAILURE;
}
buffer_size = sizeof(buffer);
status = lf2->load_file(NULL, dp2, false, &buffer_size, &buffer);
if (status != EFI_INVALID_PARAMETER) {
efi_st_error("Protocol can't be NULL\n");
return EFI_ST_FAILURE;
}
/*
* Case 2: Match end node type/sub-type on device path
*/
dp2_invalid = (struct efi_device_path *)&dp_invalid;
buffer_size = sizeof(buffer);
status = lf2->load_file(lf2, dp2_invalid, false, &buffer_size, &buffer);
if (status != EFI_INVALID_PARAMETER) {
efi_st_error("Invalid device path type must return EFI_INVALID_PARAMETER\n");
return EFI_ST_FAILURE;
}
status = lf2->load_file(lf2, dp2_invalid, false, &buffer_size, &buffer);
if (status != EFI_INVALID_PARAMETER) {
efi_st_error("Invalid device path sub-type must return EFI_INVALID_PARAMETER\n");
return EFI_ST_FAILURE;
}
/*
* Case 3:
* BootPolicy 'true' must return EFI_UNSUPPORTED
*/
buffer_size = sizeof(buffer);
status = lf2->load_file(lf2, dp2, true, &buffer_size, &buffer);
if (status != EFI_UNSUPPORTED) {
efi_st_error("BootPolicy true must return EFI_UNSUPPORTED\n");
return EFI_ST_FAILURE;
}
/*
* Case: Pass buffer size as zero, firmware must return
* EFI_BUFFER_TOO_SMALL and an appropriate size
*/
buffer_size = 0;
status = lf2->load_file(lf2, dp2, false, &buffer_size, NULL);
if (status != EFI_BUFFER_TOO_SMALL || !buffer_size) {
efi_st_printf("buffer_size: %u\n", (unsigned int)buffer_size);
efi_st_printf("status: %x\n", (unsigned int)status);
efi_st_error("Buffer size not updated\n");
return EFI_ST_FAILURE;
}
/*
* Case: Pass buffer size as smaller than the file_size,
* firmware must return * EFI_BUFFER_TOO_SMALL and an appropriate size
*/
buffer_size = 1;
status = lf2->load_file(lf2, dp2, false, &buffer_size, &buffer);
if (status != EFI_BUFFER_TOO_SMALL || buffer_size <= 1) {
efi_st_error("Buffer size not updated\n");
return EFI_ST_FAILURE;
}
status = boottime->allocate_pool(EFI_BOOT_SERVICES_DATA, buffer_size,
&buf);
if (status != EFI_SUCCESS) {
efi_st_error("Cannot allocate buffer\n");
return EFI_ST_FAILURE;
}
/* Case: Pass correct buffer, load the file and verify checksum*/
status = lf2->load_file(lf2, dp2, false, &buffer_size, buf);
if (status != EFI_SUCCESS) {
efi_st_error("Loading initrd failed\n");
return EFI_ST_FAILURE;
}
efi_st_printf("Loaded %u bytes\n", (unsigned int)buffer_size);
status = boottime->calculate_crc32(buf, buffer_size, &crc32);
if (status != EFI_SUCCESS) {
efi_st_error("Could not determine CRC32\n");
return EFI_ST_FAILURE;
}
efi_st_printf("CRC32 %u\n", (unsigned int)crc32);
status = boottime->free_pool(buf);
if (status != EFI_SUCCESS) {
efi_st_error("Cannot free buffer\n");
return EFI_ST_FAILURE;
}
return EFI_ST_SUCCESS;
}
EFI_UNIT_TEST(load_initrd) = {
.name = "load initrd",
.phase = EFI_EXECUTE_BEFORE_BOOTTIME_EXIT,
.setup = setup,
.execute = execute,
.on_request = true,
};
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