blob: 5dc11151d01218c62b2e23c1221fcffe9aeff9dc [file] [log] [blame]
/*
* Copyright (c) 2018-2023, Arm Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <assert.h>
#include <common/debug.h>
#if MEASURED_BOOT
#include <common/desc_image_load.h>
#endif
#include <common/fdt_wrappers.h>
#include <lib/fconf/fconf.h>
#include <lib/fconf/fconf_dyn_cfg_getter.h>
#include <libfdt.h>
#include <plat/arm/common/arm_dyn_cfg_helpers.h>
#include <plat/arm/common/plat_arm.h>
#define DTB_PROP_MBEDTLS_HEAP_ADDR "mbedtls_heap_addr"
#define DTB_PROP_MBEDTLS_HEAP_SIZE "mbedtls_heap_size"
#if MEASURED_BOOT
#ifdef SPD_opteed
/*
* Currently OP-TEE does not support reading DTBs from Secure memory
* and this property should be removed when this feature is supported.
*/
#define DTB_PROP_HW_SM_LOG_ADDR "tpm_event_log_sm_addr"
#endif /* SPD_opteed */
#define DTB_PROP_HW_LOG_ADDR "tpm_event_log_addr"
#define DTB_PROP_HW_LOG_SIZE "tpm_event_log_size"
#define DTB_PROP_HW_LOG_MAX_SIZE "tpm_event_log_max_size"
#endif /* MEASURED_BOOT */
static size_t event_log_max_size __unused;
/*******************************************************************************
* Validate the tb_fw_config is a valid DTB file and returns the node offset
* to "arm,tb_fw" property.
* Arguments:
* void *dtb - pointer to the TB_FW_CONFIG in memory
* int *node - Returns the node offset to "arm,tb_fw" property if found.
*
* Returns 0 on success and -1 on error.
******************************************************************************/
int arm_dyn_tb_fw_cfg_init(void *dtb, int *node)
{
assert(dtb != NULL);
assert(node != NULL);
/* Check if the pointer to DT is correct */
if (fdt_check_header(dtb) != 0) {
WARN("Invalid DTB file passed as%s\n", " TB_FW_CONFIG");
return -1;
}
/* Assert the node offset point to "arm,tb_fw" compatible property */
*node = fdt_node_offset_by_compatible(dtb, -1, "arm,tb_fw");
if (*node < 0) {
WARN("The compatible property '%s' not%s", "arm,tb_fw",
" found in the config\n");
return -1;
}
VERBOSE("Dyn cfg: '%s'%s", "arm,tb_fw", " found in the config\n");
return 0;
}
/*
* This function writes the Mbed TLS heap address and size in the DTB. When it
* is called, it is guaranteed that a DTB is available. However it is not
* guaranteed that the shared Mbed TLS heap implementation is used. Thus we
* return error code from here and it's the responsibility of the caller to
* determine the action upon error.
*
* This function is supposed to be called only by BL1.
*
* Returns:
* 0 = success
* -1 = error
*/
int arm_set_dtb_mbedtls_heap_info(void *dtb, void *heap_addr, size_t heap_size)
{
int dtb_root;
/*
* Verify that the DTB is valid, before attempting to write to it,
* and get the DTB root node.
*/
int err = arm_dyn_tb_fw_cfg_init(dtb, &dtb_root);
if (err < 0) {
ERROR("Invalid%s loaded. Unable to get root node\n",
" TB_FW_CONFIG");
return -1;
}
/*
* Write the heap address and size in the DTB.
*
* NOTE: The variables heap_addr and heap_size are corrupted
* by the "fdtw_write_inplace_cells" function. After the
* function calls they must NOT be reused.
*/
err = fdtw_write_inplace_cells(dtb, dtb_root,
DTB_PROP_MBEDTLS_HEAP_ADDR, 2, &heap_addr);
if (err < 0) {
ERROR("%sDTB property '%s'\n",
"Unable to write ", DTB_PROP_MBEDTLS_HEAP_ADDR);
return -1;
}
err = fdtw_write_inplace_cells(dtb, dtb_root,
DTB_PROP_MBEDTLS_HEAP_SIZE, 1, &heap_size);
if (err < 0) {
ERROR("%sDTB property '%s'\n",
"Unable to write ", DTB_PROP_MBEDTLS_HEAP_SIZE);
return -1;
}
return 0;
}
#if MEASURED_BOOT
/*
* Write the Event Log address and its size in the DTB.
*
* Returns:
* 0 = success
* < 0 = error
*/
static int arm_set_event_log_info(uintptr_t config_base,
#ifdef SPD_opteed
uintptr_t sm_log_addr,
#endif
uintptr_t log_addr, size_t log_size)
{
/* As libfdt uses void *, we can't avoid this cast */
void *dtb = (void *)config_base;
const char *compatible = "arm,tpm_event_log";
int err, node;
/*
* Verify that the DTB is valid, before attempting to write to it,
* and get the DTB root node.
*/
/* Check if the pointer to DT is correct */
err = fdt_check_header(dtb);
if (err < 0) {
WARN("Invalid DTB file passed\n");
return err;
}
/* Assert the node offset point to compatible property */
node = fdt_node_offset_by_compatible(dtb, -1, compatible);
if (node < 0) {
WARN("The compatible property '%s' not%s", compatible,
" found in the config\n");
return node;
}
VERBOSE("Dyn cfg: '%s'%s", compatible, " found in the config\n");
#ifdef SPD_opteed
if (sm_log_addr != 0UL) {
err = fdtw_write_inplace_cells(dtb, node,
DTB_PROP_HW_SM_LOG_ADDR, 2, &sm_log_addr);
if (err < 0) {
ERROR("%sDTB property '%s'\n",
"Unable to write ", DTB_PROP_HW_SM_LOG_ADDR);
return err;
}
}
#endif
err = fdtw_write_inplace_cells(dtb, node,
DTB_PROP_HW_LOG_ADDR, 2, &log_addr);
if (err < 0) {
ERROR("%sDTB property '%s'\n",
"Unable to write ", DTB_PROP_HW_LOG_ADDR);
return err;
}
assert(event_log_max_size != 0U);
err = fdtw_write_inplace_cells(dtb, node,
DTB_PROP_HW_LOG_MAX_SIZE, 1,
&event_log_max_size);
if (err < 0) {
ERROR("%sDTB property '%s'\n",
"Unable to write ", DTB_PROP_HW_LOG_MAX_SIZE);
return err;
}
err = fdtw_write_inplace_cells(dtb, node,
DTB_PROP_HW_LOG_SIZE, 1, &log_size);
if (err < 0) {
ERROR("%sDTB property '%s'\n",
"Unable to write ", DTB_PROP_HW_LOG_SIZE);
} else {
/*
* Ensure that the info written to the DTB is visible
* to other images.
*/
flush_dcache_range(config_base, fdt_totalsize(dtb));
}
return err;
}
/*
* This function writes the Event Log address and its size
* in the TOS_FW_CONFIG DTB.
*
* This function is supposed to be called only by BL2.
*
* Returns:
* 0 = success
* < 0 = error
*/
int arm_set_tos_fw_info(uintptr_t log_addr, size_t log_size)
{
uintptr_t config_base;
const bl_mem_params_node_t *cfg_mem_params;
int err;
assert(log_addr != 0UL);
/* Get the config load address and size of TOS_FW_CONFIG */
cfg_mem_params = get_bl_mem_params_node(TOS_FW_CONFIG_ID);
assert(cfg_mem_params != NULL);
config_base = cfg_mem_params->image_info.image_base;
/* Write the Event Log address and its size in the DTB */
err = arm_set_event_log_info(config_base,
#ifdef SPD_opteed
0UL,
#endif
log_addr, log_size);
if (err < 0) {
ERROR("%sEvent Log data to TOS_FW_CONFIG\n",
"Unable to write ");
}
return err;
}
/*
* This function writes the Event Log address and its size
* in the NT_FW_CONFIG DTB.
*
* This function is supposed to be called only by BL2.
*
* Returns:
* 0 = success
* < 0 = error
*/
int arm_set_nt_fw_info(
#ifdef SPD_opteed
uintptr_t log_addr,
#endif
size_t log_size, uintptr_t *ns_log_addr)
{
uintptr_t config_base;
uintptr_t ns_addr;
const bl_mem_params_node_t *cfg_mem_params;
int err;
assert(ns_log_addr != NULL);
/* Get the config load address and size from NT_FW_CONFIG */
cfg_mem_params = get_bl_mem_params_node(NT_FW_CONFIG_ID);
assert(cfg_mem_params != NULL);
config_base = cfg_mem_params->image_info.image_base;
/* Calculate Event Log address in Non-secure memory */
ns_addr = cfg_mem_params->image_info.image_base +
cfg_mem_params->image_info.image_max_size;
/* Check for memory space */
if ((uint64_t)(ns_addr + log_size) > ARM_NS_DRAM1_END) {
return -1;
}
/* Write the Event Log address and its size in the DTB */
err = arm_set_event_log_info(config_base,
#ifdef SPD_opteed
log_addr,
#endif
ns_addr, log_size);
/* Return Event Log address in Non-secure memory */
*ns_log_addr = (err < 0) ? 0UL : ns_addr;
return err;
}
/*
* This function writes the Event Log address and its size
* in the TB_FW_CONFIG DTB.
*
* This function is supposed to be called only by BL1.
*
* Returns:
* 0 = success
* < 0 = error
*/
int arm_set_tb_fw_info(uintptr_t log_addr, size_t log_size, size_t log_max_size)
{
/*
* Read tb_fw_config device tree for Event Log properties
* and write the Event Log address and its size in the DTB
*/
const struct dyn_cfg_dtb_info_t *tb_fw_config_info;
uintptr_t tb_fw_cfg_dtb;
int err;
tb_fw_config_info = FCONF_GET_PROPERTY(dyn_cfg, dtb, TB_FW_CONFIG_ID);
assert(tb_fw_config_info != NULL);
tb_fw_cfg_dtb = tb_fw_config_info->config_addr;
event_log_max_size = log_max_size;
err = arm_set_event_log_info(tb_fw_cfg_dtb,
#ifdef SPD_opteed
0UL,
#endif
log_addr, log_size);
return err;
}
/*
* This function reads the Event Log address and its size
* properties present in TB_FW_CONFIG DTB.
*
* This function is supposed to be called only by BL2.
*
* Returns:
* 0 = success
* < 0 = error
* Alongside returns Event Log address and its size.
*/
int arm_get_tb_fw_info(uint64_t *log_addr, size_t *log_size,
size_t *log_max_size)
{
/* As libfdt uses void *, we can't avoid this cast */
const struct dyn_cfg_dtb_info_t *tb_fw_config_info;
int node, rc;
tb_fw_config_info = FCONF_GET_PROPERTY(dyn_cfg, dtb, TB_FW_CONFIG_ID);
assert(tb_fw_config_info != NULL);
void *dtb = (void *)tb_fw_config_info->config_addr;
const char *compatible = "arm,tpm_event_log";
/* Assert the node offset point to compatible property */
node = fdt_node_offset_by_compatible(dtb, -1, compatible);
if (node < 0) {
WARN("The compatible property '%s'%s", compatible,
" not specified in TB_FW config.\n");
return node;
}
VERBOSE("Dyn cfg: '%s'%s", compatible, " found in the config\n");
rc = fdt_read_uint64(dtb, node, DTB_PROP_HW_LOG_ADDR, log_addr);
if (rc != 0) {
ERROR("%s%s", DTB_PROP_HW_LOG_ADDR,
" not specified in TB_FW config.\n");
return rc;
}
rc = fdt_read_uint32(dtb, node, DTB_PROP_HW_LOG_SIZE, (uint32_t *)log_size);
if (rc != 0) {
ERROR("%s%s", DTB_PROP_HW_LOG_SIZE,
" not specified in TB_FW config.\n");
return rc;
}
rc = fdt_read_uint32(dtb, node, DTB_PROP_HW_LOG_MAX_SIZE,
(uint32_t *)log_max_size);
if (rc != 0) {
ERROR("%s%s", DTB_PROP_HW_LOG_MAX_SIZE,
" not specified in TB_FW config.\n");
return rc;
} else {
event_log_max_size = *log_max_size;
}
return rc;
}
#endif /* MEASURED_BOOT */