blob: d8e5be9f6031bfe1de155a79bf276734ef07c9d4 [file] [log] [blame]
/*
* Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
* Copyright (c) 2018-2020, The Linux Foundation. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <string.h>
#include <common/debug.h>
#include <common/runtime_svc.h>
#include <context.h>
#include <lib/coreboot.h>
#include <lib/utils_def.h>
#include <lib/xlat_tables/xlat_tables_v2.h>
#include <smccc_helpers.h>
#include <tools_share/uuid.h>
#include <qti_plat.h>
#include <qti_secure_io_cfg.h>
#include <qtiseclib_interface.h>
/*
* SIP service - SMC function IDs for SiP Service queries
*
*/
#define QTI_SIP_SVC_CALL_COUNT_ID U(0x0200ff00)
#define QTI_SIP_SVC_UID_ID U(0x0200ff01)
/* 0x8200ff02 is reserved*/
#define QTI_SIP_SVC_VERSION_ID U(0x0200ff03)
#define QTI_SIP_SVC_AVAILABLE_ID U(0x02000601)
/*
* Syscall's to allow Non Secure world accessing peripheral/IO memory
* those are secure/proteced BUT not required to be secure.
*/
#define QTI_SIP_SVC_SECURE_IO_READ_ID U(0x02000501)
#define QTI_SIP_SVC_SECURE_IO_WRITE_ID U(0x02000502)
/*
* Syscall's to assigns a list of intermediate PAs from a
* source Virtual Machine (VM) to a destination VM.
*/
#define QTI_SIP_SVC_MEM_ASSIGN_ID U(0x02000C16)
#define QTI_SIP_SVC_SECURE_IO_READ_PARAM_ID U(0x1)
#define QTI_SIP_SVC_SECURE_IO_WRITE_PARAM_ID U(0x2)
#define QTI_SIP_SVC_MEM_ASSIGN_PARAM_ID U(0x1117)
#define QTI_SIP_SVC_CALL_COUNT U(0x3)
#define QTI_SIP_SVC_VERSION_MAJOR U(0x0)
#define QTI_SIP_SVC_VERSION_MINOR U(0x0)
#define QTI_VM_LAST U(44)
#define SIZE4K U(0x1000)
#define QTI_VM_MAX_LIST_SIZE U(0x20)
#define FUNCID_OEN_NUM_MASK ((FUNCID_OEN_MASK << FUNCID_OEN_SHIFT)\
|(FUNCID_NUM_MASK << FUNCID_NUM_SHIFT))
enum {
QTI_SIP_SUCCESS = 0,
QTI_SIP_NOT_SUPPORTED = -1,
QTI_SIP_PREEMPTED = -2,
QTI_SIP_INVALID_PARAM = -3,
};
/* QTI SiP Service UUID */
DEFINE_SVC_UUID2(qti_sip_svc_uid,
0x43864748, 0x217f, 0x41ad, 0xaa, 0x5a,
0xba, 0xe7, 0x0f, 0xa5, 0x52, 0xaf);
static bool qti_is_secure_io_access_allowed(u_register_t addr)
{
int i = 0;
for (i = 0; i < ARRAY_SIZE(qti_secure_io_allowed_regs); i++) {
if ((uintptr_t) addr == qti_secure_io_allowed_regs[i]) {
return true;
}
}
return false;
}
static bool qti_check_syscall_availability(u_register_t smc_fid)
{
switch (smc_fid) {
case QTI_SIP_SVC_CALL_COUNT_ID:
case QTI_SIP_SVC_UID_ID:
case QTI_SIP_SVC_VERSION_ID:
case QTI_SIP_SVC_AVAILABLE_ID:
case QTI_SIP_SVC_SECURE_IO_READ_ID:
case QTI_SIP_SVC_SECURE_IO_WRITE_ID:
case QTI_SIP_SVC_MEM_ASSIGN_ID:
return true;
default:
return false;
}
}
bool qti_mem_assign_validate_param(memprot_info_t *mem_info,
u_register_t u_num_mappings,
uint32_t *source_vm_list,
u_register_t src_vm_list_cnt,
memprot_dst_vm_perm_info_t *dest_vm_list,
u_register_t dst_vm_list_cnt)
{
int i;
if (!source_vm_list || !dest_vm_list || !mem_info
|| (src_vm_list_cnt == 0)
|| (src_vm_list_cnt >= QTI_VM_LAST) || (dst_vm_list_cnt == 0)
|| (dst_vm_list_cnt >= QTI_VM_LAST) || (u_num_mappings == 0)
|| u_num_mappings > QTI_VM_MAX_LIST_SIZE) {
ERROR("vm count is 0 or more then QTI_VM_LAST or empty list\n");
ERROR("source_vm_list %p dest_vm_list %p mem_info %p src_vm_list_cnt %u dst_vm_list_cnt %u u_num_mappings %u\n",
source_vm_list, dest_vm_list, mem_info,
(unsigned int)src_vm_list_cnt,
(unsigned int)dst_vm_list_cnt,
(unsigned int)u_num_mappings);
return false;
}
for (i = 0; i < u_num_mappings; i++) {
if ((mem_info[i].mem_addr & (SIZE4K - 1))
|| (mem_info[i].mem_size == 0)
|| (mem_info[i].mem_size & (SIZE4K - 1))) {
ERROR("mem_info passed buffer 0x%x or size 0x%x is not 4k aligned\n",
(unsigned int)mem_info[i].mem_addr,
(unsigned int)mem_info[i].mem_size);
return false;
}
if ((mem_info[i].mem_addr + mem_info[i].mem_size) <
mem_info[i].mem_addr) {
ERROR("overflow in mem_addr 0x%x add mem_size 0x%x\n",
(unsigned int)mem_info[i].mem_addr,
(unsigned int)mem_info[i].mem_size);
return false;
}
coreboot_memory_t mem_type = coreboot_get_memory_type(
mem_info[i].mem_addr,
mem_info[i].mem_size);
if (mem_type != CB_MEM_RAM && mem_type != CB_MEM_RESERVED) {
ERROR("memory region not in CB MEM RAM or RESERVED area: region start 0x%x size 0x%x\n",
(unsigned int)mem_info[i].mem_addr,
(unsigned int)mem_info[i].mem_size);
return false;
}
}
for (i = 0; i < src_vm_list_cnt; i++) {
if (source_vm_list[i] >= QTI_VM_LAST) {
ERROR("source_vm_list[%d] 0x%x is more then QTI_VM_LAST\n",
i, (unsigned int)source_vm_list[i]);
return false;
}
}
for (i = 0; i < dst_vm_list_cnt; i++) {
if (dest_vm_list[i].dst_vm >= QTI_VM_LAST) {
ERROR("dest_vm_list[%d] 0x%x is more then QTI_VM_LAST\n",
i, (unsigned int)dest_vm_list[i].dst_vm);
return false;
}
}
return true;
}
static uintptr_t qti_sip_mem_assign(void *handle, uint32_t smc_cc,
u_register_t x1,
u_register_t x2,
u_register_t x3, u_register_t x4)
{
uintptr_t dyn_map_start = 0, dyn_map_end = 0;
size_t dyn_map_size = 0;
u_register_t x6, x7;
int ret = QTI_SIP_NOT_SUPPORTED;
u_register_t x5 = read_ctx_reg(get_gpregs_ctx(handle), CTX_GPREG_X5);
if (smc_cc == SMC_32) {
x5 = (uint32_t) x5;
}
/* Validate input arg count & retrieve arg3-6 from NS Buffer. */
if ((x1 != QTI_SIP_SVC_MEM_ASSIGN_PARAM_ID) || (x5 == 0x0)) {
ERROR("invalid mem_assign param id or no mapping info\n");
goto unmap_return;
}
/* Map NS Buffer. */
dyn_map_start = x5;
dyn_map_size =
(smc_cc ==
SMC_32) ? (sizeof(uint32_t) * 4) : (sizeof(uint64_t) * 4);
if (qti_mmap_add_dynamic_region(dyn_map_start, dyn_map_size,
(MT_NS | MT_RO_DATA)) != 0) {
ERROR("map failed for params NS Buffer %x %x\n",
(unsigned int)dyn_map_start, (unsigned int)dyn_map_size);
goto unmap_return;
}
/* Retrieve indirect args. */
if (smc_cc == SMC_32) {
x6 = *((uint32_t *) x5 + 1);
x7 = *((uint32_t *) x5 + 2);
x5 = *(uint32_t *) x5;
} else {
x6 = *((uint64_t *) x5 + 1);
x7 = *((uint64_t *) x5 + 2);
x5 = *(uint64_t *) x5;
}
/* Un-Map NS Buffer. */
if (qti_mmap_remove_dynamic_region(dyn_map_start, dyn_map_size) != 0) {
ERROR("unmap failed for params NS Buffer %x %x\n",
(unsigned int)dyn_map_start, (unsigned int)dyn_map_size);
goto unmap_return;
}
/*
* Map NS Buffers.
* arg0,2,4 points to buffers & arg1,3,5 hold sizes.
* MAP api's fail to map if it's already mapped. Let's
* find lowest start & highest end address, then map once.
*/
dyn_map_start = MIN(x2, x4);
dyn_map_start = MIN(dyn_map_start, x6);
dyn_map_end = MAX((x2 + x3), (x4 + x5));
dyn_map_end = MAX(dyn_map_end, (x6 + x7));
dyn_map_size = dyn_map_end - dyn_map_start;
if (qti_mmap_add_dynamic_region(dyn_map_start, dyn_map_size,
(MT_NS | MT_RO_DATA)) != 0) {
ERROR("map failed for params NS Buffer2 %x %x\n",
(unsigned int)dyn_map_start, (unsigned int)dyn_map_size);
goto unmap_return;
}
memprot_info_t *mem_info_p = (memprot_info_t *) x2;
uint32_t u_num_mappings = x3 / sizeof(memprot_info_t);
uint32_t *source_vm_list_p = (uint32_t *) x4;
uint32_t src_vm_list_cnt = x5 / sizeof(uint32_t);
memprot_dst_vm_perm_info_t *dest_vm_list_p =
(memprot_dst_vm_perm_info_t *) x6;
uint32_t dst_vm_list_cnt =
x7 / sizeof(memprot_dst_vm_perm_info_t);
if (qti_mem_assign_validate_param(mem_info_p, u_num_mappings,
source_vm_list_p, src_vm_list_cnt,
dest_vm_list_p,
dst_vm_list_cnt) != true) {
ERROR("Param validation failed\n");
goto unmap_return;
}
memprot_info_t mem_info[QTI_VM_MAX_LIST_SIZE];
/* Populating the arguments */
for (int i = 0; i < u_num_mappings; i++) {
mem_info[i].mem_addr = mem_info_p[i].mem_addr;
mem_info[i].mem_size = mem_info_p[i].mem_size;
}
memprot_dst_vm_perm_info_t dest_vm_list[QTI_VM_LAST];
for (int i = 0; i < dst_vm_list_cnt; i++) {
dest_vm_list[i].dst_vm = dest_vm_list_p[i].dst_vm;
dest_vm_list[i].dst_vm_perm = dest_vm_list_p[i].dst_vm_perm;
dest_vm_list[i].ctx = dest_vm_list_p[i].ctx;
dest_vm_list[i].ctx_size = dest_vm_list_p[i].ctx_size;
}
uint32_t source_vm_list[QTI_VM_LAST];
for (int i = 0; i < src_vm_list_cnt; i++) {
source_vm_list[i] = source_vm_list_p[i];
}
/* Un-Map NS Buffers. */
if (qti_mmap_remove_dynamic_region(dyn_map_start,
dyn_map_size) != 0) {
ERROR("unmap failed for params NS Buffer %x %x\n",
(unsigned int)dyn_map_start, (unsigned int)dyn_map_size);
goto unmap_return;
}
/* Invoke API lib api. */
ret = qtiseclib_mem_assign(mem_info, u_num_mappings,
source_vm_list, src_vm_list_cnt,
dest_vm_list, dst_vm_list_cnt);
if (ret == 0) {
SMC_RET2(handle, QTI_SIP_SUCCESS, ret);
}
unmap_return:
/* Un-Map NS Buffers if mapped */
if (dyn_map_start && dyn_map_size) {
qti_mmap_remove_dynamic_region(dyn_map_start, dyn_map_size);
}
SMC_RET2(handle, QTI_SIP_INVALID_PARAM, ret);
}
/*
* This function handles QTI specific syscalls. Currently only SiP calls are present.
* Both FAST & YIELD type call land here.
*/
static uintptr_t qti_sip_handler(uint32_t smc_fid,
u_register_t x1,
u_register_t x2,
u_register_t x3,
u_register_t x4,
void *cookie, void *handle, u_register_t flags)
{
uint32_t l_smc_fid = smc_fid & FUNCID_OEN_NUM_MASK;
if (GET_SMC_CC(smc_fid) == SMC_32) {
x1 = (uint32_t) x1;
x2 = (uint32_t) x2;
x3 = (uint32_t) x3;
x4 = (uint32_t) x4;
}
switch (l_smc_fid) {
case QTI_SIP_SVC_CALL_COUNT_ID:
{
SMC_RET1(handle, QTI_SIP_SVC_CALL_COUNT);
break;
}
case QTI_SIP_SVC_UID_ID:
{
/* Return UID to the caller */
SMC_UUID_RET(handle, qti_sip_svc_uid);
break;
}
case QTI_SIP_SVC_VERSION_ID:
{
/* Return the version of current implementation */
SMC_RET2(handle, QTI_SIP_SVC_VERSION_MAJOR,
QTI_SIP_SVC_VERSION_MINOR);
break;
}
case QTI_SIP_SVC_AVAILABLE_ID:
{
if (x1 != 1) {
SMC_RET1(handle, QTI_SIP_INVALID_PARAM);
}
if (qti_check_syscall_availability(x2) == true) {
SMC_RET2(handle, QTI_SIP_SUCCESS, 1);
} else {
SMC_RET2(handle, QTI_SIP_SUCCESS, 0);
}
break;
}
case QTI_SIP_SVC_SECURE_IO_READ_ID:
{
if ((x1 == QTI_SIP_SVC_SECURE_IO_READ_PARAM_ID) &&
qti_is_secure_io_access_allowed(x2)) {
SMC_RET2(handle, QTI_SIP_SUCCESS,
*((volatile uint32_t *)x2));
}
SMC_RET1(handle, QTI_SIP_INVALID_PARAM);
break;
}
case QTI_SIP_SVC_SECURE_IO_WRITE_ID:
{
if ((x1 == QTI_SIP_SVC_SECURE_IO_WRITE_PARAM_ID) &&
qti_is_secure_io_access_allowed(x2)) {
*((volatile uint32_t *)x2) = x3;
SMC_RET1(handle, QTI_SIP_SUCCESS);
}
SMC_RET1(handle, QTI_SIP_INVALID_PARAM);
break;
}
case QTI_SIP_SVC_MEM_ASSIGN_ID:
{
return qti_sip_mem_assign(handle, GET_SMC_CC(smc_fid),
x1, x2, x3, x4);
break;
}
default:
{
SMC_RET1(handle, QTI_SIP_NOT_SUPPORTED);
}
}
return (uintptr_t) handle;
}
/* Define a runtime service descriptor for both fast & yield SiP calls */
DECLARE_RT_SVC(qti_sip_fast_svc, OEN_SIP_START,
OEN_SIP_END, SMC_TYPE_FAST, NULL, qti_sip_handler);
DECLARE_RT_SVC(qti_sip_yield_svc, OEN_SIP_START,
OEN_SIP_END, SMC_TYPE_YIELD, NULL, qti_sip_handler);