static void transfer_tables(struct pgt_cache *pgt_cache, void *old_ctx,
vaddr_t old_va, void *new_ctx, vaddr_t new_va,
size_t size)
{
const size_t pgtsize = CORE_MMU_PGDIR_SIZE;
const vaddr_t new_base = ROUNDDOWN(new_va, pgtsize);
const vaddr_t old_base = ROUNDDOWN(old_va, pgtsize);
const size_t num_new_pgt = (size - 1 + new_va - new_base) / pgtsize + 1;
const size_t num_old_pgt = (size - 1 + old_va - old_base) / pgtsize + 1;
struct pgt *new_pgt[num_new_pgt];
struct pgt *old_pgt[num_old_pgt];
struct pgt *pgt;
size_t n;
/*
* Fill in new_pgt based on pgt_cache. Note that the pages should
* already have been allocated.
*/
SLIST_FOREACH(pgt, pgt_cache, link) {
if (pgt->vabase < new_base)
continue;
n = (pgt->vabase - new_base) / pgtsize;
if (n < num_new_pgt)
new_pgt[n] = pgt;
}
for (n = 0; n < num_new_pgt; n++) {
assert(new_pgt[n]);
assert(new_pgt[n]->ctx == new_ctx);
}
mutex_lock(&pgt_mu);
/* Extract the array of pgts that need their content transferred */
for (n = 0; n < num_old_pgt; n++) {
/*
* If the pgt isn't in the cache list there's nothing to
* transfer, so NULL here is OK.
*/
old_pgt[n] = pop_from_cache_list(old_base + n * pgtsize,
old_ctx);
}
tee_pager_transfer_uta_region(to_user_ta_ctx(old_ctx), old_va,
to_user_ta_ctx(new_ctx), new_va, new_pgt,
size);
for (n = 0; n < num_old_pgt; n++) {
if (!old_pgt[n])
continue;
if (old_pgt[n]->num_used_entries)
push_to_cache_list(old_pgt[n]);
else
push_to_free_list(old_pgt[n]);
}
mutex_unlock(&pgt_mu);
}
TEE_Result syscall_se_reader_open_session(unsigned long reader_handle,
uint32_t *session_handle)
{
TEE_Result ret;
struct tee_se_reader_proxy *r = tee_svc_uref_to_kaddr(reader_handle);
struct tee_ta_session *sess;
struct tee_se_service *service;
struct tee_se_session *ksession = NULL;
if (!tee_se_manager_is_reader_proxy_valid(r))
return TEE_ERROR_BAD_PARAMETERS;
ret = tee_ta_get_current_session(&sess);
if (ret != TEE_SUCCESS)
return ret;
ret = tee_se_reader_open_session(r, &ksession);
if (ret != TEE_SUCCESS)
return ret;
service = to_user_ta_ctx(sess->ctx)->se_service;
ret = tee_se_service_add_session(service, ksession);
ret = tee_svc_copy_kaddr_to_uref(session_handle, ksession);
if (ret != TEE_SUCCESS)
return ret;
return TEE_SUCCESS;
}
uintptr_t tee_mmu_get_load_addr(const struct tee_ta_ctx *const ctx)
{
const struct user_ta_ctx *utc = to_user_ta_ctx((void *)ctx);
TEE_ASSERT(utc->mmu && utc->mmu->table &&
utc->mmu->size == TEE_MMU_UMAP_MAX_ENTRIES);
return utc->mmu->table[1].va;
}
uintptr_t tee_mmu_get_load_addr(const struct tee_ta_ctx *const ctx)
{
const struct user_ta_ctx *utc = to_user_ta_ctx((void *)ctx);
TEE_ASSERT(utc->mmu && utc->mmu->table &&
utc->mmu->size >= TEE_MMU_UMAP_CODE_IDX);
return utc->mmu->table[TEE_MMU_UMAP_CODE_IDX].va;
}
/*
* tee_uta_cache_operation - dynamic cache clean/inval request from a TA
* It follows ARM recommendation:
* http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0246d/Beicdhde.html
* Note that this implementation assumes dsb operations are part of
* cache_maintenance_l1(), and L2 cache sync are part of
* cache_maintenance_l2()
*/
static TEE_Result cache_operation(struct tee_ta_session *sess,
enum utee_cache_operation op, void *va, size_t len)
{
TEE_Result ret;
paddr_t pa = 0;
struct user_ta_ctx *utc = to_user_ta_ctx(sess->ctx);
if ((sess->ctx->flags & TA_FLAG_CACHE_MAINTENANCE) == 0)
return TEE_ERROR_NOT_SUPPORTED;
/*
* TAs are allowed to operate cache maintenance on TA memref parameters
* only, not on the TA private memory.
*/
if (tee_mmu_is_vbuf_intersect_ta_private(utc, va, len))
return TEE_ERROR_ACCESS_DENIED;
ret = tee_mmu_check_access_rights(utc, TEE_MEMORY_ACCESS_READ |
TEE_MEMORY_ACCESS_ANY_OWNER,
(uaddr_t)va, len);
if (ret != TEE_SUCCESS)
return TEE_ERROR_ACCESS_DENIED;
pa = virt_to_phys(va);
if (!pa)
return TEE_ERROR_ACCESS_DENIED;
switch (op) {
case TEE_CACHEFLUSH:
/* Clean L1, Flush L2, Flush L1 */
ret = cache_maintenance_l1(DCACHE_AREA_CLEAN, va, len);
if (ret != TEE_SUCCESS)
return ret;
ret = cache_maintenance_l2(L2CACHE_AREA_CLEAN_INV, pa, len);
if (ret != TEE_SUCCESS)
return ret;
return cache_maintenance_l1(DCACHE_AREA_CLEAN_INV, va, len);
case TEE_CACHECLEAN:
/* Clean L1, Clean L2 */
ret = cache_maintenance_l1(DCACHE_AREA_CLEAN, va, len);
if (ret != TEE_SUCCESS)
return ret;
return cache_maintenance_l2(L2CACHE_AREA_CLEAN, pa, len);
case TEE_CACHEINVALIDATE:
/* Inval L2, Inval L1 */
ret = cache_maintenance_l2(L2CACHE_AREA_INVALIDATE, pa, len);
if (ret != TEE_SUCCESS)
return ret;
return cache_maintenance_l1(DCACHE_AREA_INVALIDATE, va, len);
default:
return TEE_ERROR_NOT_SUPPORTED;
}
}
void tee_mmu_set_ctx(struct tee_ta_ctx *ctx)
{
if (!ctx || !is_user_ta_ctx(ctx)) {
core_mmu_set_user_map(NULL);
} else {
struct core_mmu_user_map map;
struct user_ta_ctx *utc = to_user_ta_ctx(ctx);
core_mmu_create_user_map(utc->mmu, utc->context, &map);
core_mmu_set_user_map(&map);
}
}
static void check_pa_matches_va(void *va, paddr_t pa)
{
TEE_Result res;
vaddr_t user_va_base;
size_t user_va_size;
vaddr_t v = (vaddr_t)va;
paddr_t p = 0;
core_mmu_get_user_va_range(&user_va_base, &user_va_size);
if (v >= user_va_base && v < (user_va_base + user_va_size)) {
if (!core_mmu_user_mapping_is_active()) {
TEE_ASSERT(pa == 0);
return;
}
res = tee_mmu_user_va2pa_helper(
to_user_ta_ctx(tee_mmu_get_ctx()), va, &p);
if (res == TEE_SUCCESS)
TEE_ASSERT(pa == p);
else
TEE_ASSERT(pa == 0);
return;
}
#ifdef CFG_WITH_PAGER
if (v >= (CFG_TEE_LOAD_ADDR & ~CORE_MMU_PGDIR_MASK) &&
v <= (CFG_TEE_LOAD_ADDR | CORE_MMU_PGDIR_MASK)) {
struct core_mmu_table_info *ti = &tee_pager_tbl_info;
uint32_t a;
/*
* Lookups in the page table managed by the pager is
* dangerous for addresses in the paged area as those pages
* changes all the time. But some ranges are safe, rw areas
* when the page is populated for instance.
*/
core_mmu_get_entry(ti, core_mmu_va2idx(ti, v), &p, &a);
if (a & TEE_MATTR_VALID_BLOCK) {
paddr_t mask = ((1 << ti->shift) - 1);
p |= v & mask;
TEE_ASSERT(pa == p);
} else
TEE_ASSERT(pa == 0);
return;
}
#endif
if (!core_va2pa_helper(va, &p))
TEE_ASSERT(pa == p);
else
TEE_ASSERT(pa == 0);
}
static void *phys_to_virt_ta_vaspace(paddr_t pa)
{
TEE_Result res;
void *va = NULL;
if (!core_mmu_user_mapping_is_active())
return NULL;
res = tee_mmu_user_pa2va_helper(to_user_ta_ctx(tee_mmu_get_ctx()),
pa, &va);
if (res != TEE_SUCCESS)
return NULL;
return va;
}
/*
* tee_uta_cache_operation - dynamic cache clean/inval request from a TA
* It follows ARM recommendation:
* http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0246d/Beicdhde.html
* Note that this implementation assumes dsb operations are part of
* cache_maintenance_l1(), and L2 cache sync are part of
* cache_maintenance_l2()
*/
static TEE_Result cache_operation(struct tee_ta_session *sess,
enum utee_cache_operation op, void *va, size_t len)
{
TEE_Result ret;
paddr_t pa = 0;
struct user_ta_ctx *utc = to_user_ta_ctx(sess->ctx);
if ((sess->ctx->flags & TA_FLAG_CACHE_MAINTENANCE) == 0)
return TEE_ERROR_NOT_SUPPORTED;
ret = tee_mmu_check_access_rights(utc, TEE_MEMORY_ACCESS_WRITE,
(tee_uaddr_t)va, len);
if (ret != TEE_SUCCESS)
return TEE_ERROR_ACCESS_DENIED;
pa = virt_to_phys(va);
if (!pa)
return TEE_ERROR_ACCESS_DENIED;
switch (op) {
case TEE_CACHEFLUSH:
/* Clean L1, Flush L2, Flush L1 */
ret = cache_maintenance_l1(DCACHE_AREA_CLEAN, va, len);
if (ret != TEE_SUCCESS)
return ret;
ret = cache_maintenance_l2(L2CACHE_AREA_CLEAN_INV, pa, len);
if (ret != TEE_SUCCESS)
return ret;
return cache_maintenance_l1(DCACHE_AREA_CLEAN_INV, va, len);
case TEE_CACHECLEAN:
/* Clean L1, Clean L2 */
ret = cache_maintenance_l1(DCACHE_AREA_CLEAN, va, len);
if (ret != TEE_SUCCESS)
return ret;
return cache_maintenance_l2(L2CACHE_AREA_CLEAN, pa, len);
case TEE_CACHEINVALIDATE:
/* Inval L2, Inval L1 */
ret = cache_maintenance_l2(L2CACHE_AREA_INVALIDATE, pa, len);
if (ret != TEE_SUCCESS)
return ret;
return cache_maintenance_l1(DCACHE_AREA_INVALIDATE, va, len);
default:
return TEE_ERROR_NOT_SUPPORTED;
}
}
TEE_Result syscall_se_session_is_closed(unsigned long session_handle)
{
TEE_Result ret;
struct tee_se_session *s = tee_svc_uref_to_kaddr(session_handle);
struct tee_ta_session *sess;
struct tee_se_service *service;
ret = tee_ta_get_current_session(&sess);
if (ret != TEE_SUCCESS)
return ret;
service = to_user_ta_ctx(sess->ctx)->se_service;
if (!tee_se_service_is_session_valid(service, s))
return TEE_ERROR_BAD_PARAMETERS;
return tee_se_service_is_session_closed(service, s);
}
TEE_Result syscall_se_session_open_channel(unsigned long session_handle,
unsigned long is_logical, const void *aid_buf,
size_t aid_buf_len, uint32_t *channel_handle)
{
TEE_Result ret;
struct tee_se_session *s = tee_svc_uref_to_kaddr(session_handle);
struct tee_ta_session *sess;
struct tee_se_service *service;
struct tee_se_aid *se_aid = NULL;
struct tee_se_channel *kc = NULL;
ret = tee_ta_get_current_session(&sess);
if (ret != TEE_SUCCESS)
return ret;
service = to_user_ta_ctx(sess->ctx)->se_service;
if (!tee_se_service_is_session_valid(service, s))
return TEE_ERROR_BAD_PARAMETERS;
if (aid_buf) {
ret = tee_se_aid_create_from_buffer((void *)aid_buf,
aid_buf_len, &se_aid);
if (ret != TEE_SUCCESS)
return ret;
}
if (is_logical)
ret = tee_se_session_open_logical_channel(s, se_aid, &kc);
else
ret = tee_se_session_open_basic_channel(s, se_aid, &kc);
if (ret != TEE_SUCCESS)
goto error_free_aid;
ret = tee_svc_copy_kaddr_to_uref(channel_handle, kc);
if (ret != TEE_SUCCESS)
goto error_free_aid;
return TEE_SUCCESS;
error_free_aid:
if (se_aid)
tee_se_aid_release(se_aid);
return TEE_SUCCESS;
}
TEE_Result syscall_se_reader_close_sessions(unsigned long reader_handle)
{
TEE_Result ret;
struct tee_se_reader_proxy *r = tee_svc_uref_to_kaddr(reader_handle);
struct tee_se_service *service;
struct tee_ta_session *sess;
if (!tee_se_manager_is_reader_proxy_valid(r))
return TEE_ERROR_BAD_PARAMETERS;
ret = tee_ta_get_current_session(&sess);
if (ret != TEE_SUCCESS)
return ret;
service = to_user_ta_ctx(sess->ctx)->se_service;
tee_se_service_close_sessions_by_reader(service, r);
return TEE_SUCCESS;
}
static TEE_Result gprof_start_pc_sampling(struct tee_ta_session *s,
uint32_t param_types,
TEE_Param params[TEE_NUM_PARAMS])
{
uint32_t exp_pt = TEE_PARAM_TYPES(TEE_PARAM_TYPE_MEMREF_INOUT,
TEE_PARAM_TYPE_VALUE_INPUT,
TEE_PARAM_TYPE_NONE,
TEE_PARAM_TYPE_NONE);
struct sample_buf *sbuf;
uint32_t offset;
uint32_t scale;
TEE_Result res;
uint32_t len;
uaddr_t buf;
if (exp_pt != param_types)
return TEE_ERROR_BAD_PARAMETERS;
buf = (uaddr_t)params[0].memref.buffer;
len = params[0].memref.size;
offset = params[1].value.a;
scale = params[1].value.b;
res = tee_mmu_check_access_rights(to_user_ta_ctx(s->ctx),
TEE_MEMORY_ACCESS_WRITE |
TEE_MEMORY_ACCESS_ANY_OWNER,
buf, len);
if (res != TEE_SUCCESS)
return res;
sbuf = calloc(1, sizeof(*sbuf));
if (!sbuf)
return TEE_ERROR_OUT_OF_MEMORY;
sbuf->samples = (uint16_t *)buf;
sbuf->nsamples = len / sizeof(*sbuf->samples);
sbuf->offset = offset;
sbuf->scale = scale;
sbuf->freq = read_cntfrq();
sbuf->enabled = true;
s->sbuf = sbuf;
return TEE_SUCCESS;
}
TEE_Result syscall_se_channel_get_select_resp(unsigned long channel_handle,
void *resp, uint64_t *resp_len)
{
TEE_Result ret;
struct tee_se_channel *c = tee_svc_uref_to_kaddr(channel_handle);
struct tee_ta_session *sess;
struct tee_se_service *service;
struct resp_apdu *resp_apdu;
size_t kresp_len;
uint64_t uresp_len;
ret = tee_ta_get_current_session(&sess);
if (ret != TEE_SUCCESS)
return ret;
service = to_user_ta_ctx(sess->ctx)->se_service;
if (!tee_se_service_is_channel_valid(service, c))
return TEE_ERROR_BAD_PARAMETERS;
ret = tee_svc_copy_from_user(&uresp_len, resp_len, sizeof(size_t));
if (ret != TEE_SUCCESS)
return TEE_ERROR_BAD_PARAMETERS;
ret = tee_se_channel_get_select_response(c, &resp_apdu);
if (ret != TEE_SUCCESS)
return ret;
kresp_len = apdu_get_length(to_apdu_base(resp_apdu));
if (uresp_len < kresp_len)
return TEE_ERROR_SHORT_BUFFER;
ret = tee_svc_copy_to_user(resp,
apdu_get_data(to_apdu_base(resp_apdu)), kresp_len);
if (ret != TEE_SUCCESS)
return ret;
uresp_len = kresp_len;
ret = tee_svc_copy_to_user(resp_len, &uresp_len, sizeof(*resp_len));
if (ret != TEE_SUCCESS)
return ret;
return TEE_SUCCESS;
}
TEE_Result syscall_se_channel_select_next(unsigned long channel_handle)
{
TEE_Result ret;
struct tee_se_channel *c = tee_svc_uref_to_kaddr(channel_handle);
struct tee_ta_session *sess;
struct tee_se_service *service;
ret = tee_ta_get_current_session(&sess);
if (ret != TEE_SUCCESS)
return ret;
service = to_user_ta_ctx(sess->ctx)->se_service;
if (!tee_se_service_is_channel_valid(service, c))
return TEE_ERROR_BAD_PARAMETERS;
tee_se_channel_select_next(c);
return TEE_SUCCESS;
}
TEE_Result syscall_se_session_get_atr(unsigned long session_handle,
void *atr, uint64_t *atr_len)
{
TEE_Result ret;
struct tee_se_session *s = tee_svc_uref_to_kaddr(session_handle);
struct tee_ta_session *sess;
struct tee_se_service *service;
size_t katr_len;
uint64_t uatr_len;
uint8_t *katr;
ret = tee_ta_get_current_session(&sess);
if (ret != TEE_SUCCESS)
return ret;
service = to_user_ta_ctx(sess->ctx)->se_service;
if (!tee_se_service_is_session_valid(service, s))
return TEE_ERROR_BAD_PARAMETERS;
ret = tee_svc_copy_from_user(&uatr_len, atr_len, sizeof(uatr_len));
if (ret != TEE_SUCCESS)
return ret;
katr_len = uatr_len;
ret = tee_se_session_get_atr(s, &katr, &katr_len);
if (ret != TEE_SUCCESS)
return ret;
if (uatr_len < katr_len)
return TEE_ERROR_SHORT_BUFFER;
ret = tee_svc_copy_to_user(atr, katr, katr_len);
if (ret != TEE_SUCCESS)
return ret;
uatr_len = katr_len;
ret = tee_svc_copy_to_user(atr_len, &uatr_len, sizeof(*atr_len));
if (ret != TEE_SUCCESS)
return ret;
return TEE_SUCCESS;
}
void tee_mmu_set_ctx(struct tee_ta_ctx *ctx)
{
if (!ctx || !is_user_ta_ctx(ctx)) {
core_mmu_set_user_map(NULL);
#ifdef CFG_SMALL_PAGE_USER_TA
/*
* We're not needing the user page tables for the moment,
* release them as some other thread may be waiting for
* them.
*/
pgt_free(&thread_get_tsd()->pgt_cache);
#endif
} else {
struct core_mmu_user_map map;
struct user_ta_ctx *utc = to_user_ta_ctx(ctx);
core_mmu_create_user_map(utc->mmu, utc->context, &map);
core_mmu_set_user_map(&map);
}
thread_get_tsd()->ctx = ctx;
}
static void get_current_ta_exidx_stack(vaddr_t *exidx, size_t *exidx_sz,
vaddr_t *stack, size_t *stack_size)
{
struct tee_ta_session *s;
struct user_ta_ctx *utc;
if (tee_ta_get_current_session(&s) != TEE_SUCCESS)
panic();
utc = to_user_ta_ctx(s->ctx);
/* Only 32-bit TAs use .ARM.exidx/.ARM.extab exception handling */
assert(utc->is_32bit);
*exidx = utc->exidx_start; /* NULL if TA has no unwind tables */
if (*exidx)
*exidx += utc->load_addr;
*exidx_sz = utc->exidx_size;
*stack = utc->stack_addr;
*stack_size = utc->mobj_stack->size;
}
TEE_Result syscall_se_channel_transmit(unsigned long channel_handle,
void *cmd, unsigned long cmd_len, void *resp,
uint64_t *resp_len)
{
TEE_Result ret;
struct tee_se_channel *c = tee_svc_uref_to_kaddr(channel_handle);
struct tee_ta_session *sess;
struct tee_se_service *service;
struct cmd_apdu *cmd_apdu;
struct resp_apdu *resp_apdu;
void *kcmd_buf;
uint64_t kresp_len;
ret = tee_ta_get_current_session(&sess);
if (ret != TEE_SUCCESS)
return ret;
service = to_user_ta_ctx(sess->ctx)->se_service;
if (!tee_se_service_is_channel_valid(service, c))
return TEE_ERROR_BAD_PARAMETERS;
ret = tee_svc_copy_from_user(&kresp_len, resp_len, sizeof(kresp_len));
if (ret != TEE_SUCCESS)
return ret;
kcmd_buf = malloc(cmd_len);
if (kcmd_buf == NULL)
return TEE_ERROR_OUT_OF_MEMORY;
ret = tee_svc_copy_from_user(kcmd_buf, cmd, cmd_len);
if (ret != TEE_SUCCESS)
goto err_free_cmd_buf;
cmd_apdu =
alloc_cmd_apdu_from_buf(kcmd_buf, cmd_len);
if (cmd_apdu == NULL)
goto err_free_cmd_buf;
kresp_len -= 2; /* reserve space for SW1 and SW2 */
resp_apdu = alloc_resp_apdu(kresp_len);
if (resp_apdu == NULL)
goto err_free_cmd_apdu;
ret = tee_se_channel_transmit(c, cmd_apdu, resp_apdu);
if (ret != TEE_SUCCESS)
goto err_free_resp_apdu;
kresp_len = apdu_get_length(to_apdu_base(resp_apdu));
ret = tee_svc_copy_to_user(resp_len, &kresp_len, sizeof(*resp_len));
if (ret != TEE_SUCCESS)
goto err_free_resp_apdu;
ret = tee_svc_copy_to_user(resp, resp_apdu_get_data(resp_apdu),
kresp_len);
if (ret != TEE_SUCCESS)
goto err_free_resp_apdu;
apdu_release(to_apdu_base(resp_apdu));
apdu_release(to_apdu_base(cmd_apdu));
free(kcmd_buf);
return TEE_SUCCESS;
err_free_resp_apdu:
apdu_release(to_apdu_base(resp_apdu));
err_free_cmd_apdu:
apdu_release(to_apdu_base(cmd_apdu));
err_free_cmd_buf:
free(kcmd_buf);
return ret;
}
static void check_pa_matches_va(void *va, paddr_t pa)
{
TEE_Result res;
vaddr_t v = (vaddr_t)va;
paddr_t p = 0;
if (core_mmu_user_va_range_is_defined()) {
vaddr_t user_va_base;
size_t user_va_size;
core_mmu_get_user_va_range(&user_va_base, &user_va_size);
if (v >= user_va_base &&
v <= (user_va_base - 1 + user_va_size)) {
if (!core_mmu_user_mapping_is_active()) {
if (pa)
panic("issue in linear address space");
return;
}
res = tee_mmu_user_va2pa_helper(
to_user_ta_ctx(tee_mmu_get_ctx()), va, &p);
if (res == TEE_SUCCESS && pa != p)
panic("bad pa");
if (res != TEE_SUCCESS && pa)
panic("false pa");
return;
}
}
#ifdef CFG_WITH_PAGER
if (v >= CFG_TEE_LOAD_ADDR && v < get_linear_map_end()) {
if (v != pa)
panic("issue in linear address space");
return;
}
if (v >= (CFG_TEE_LOAD_ADDR & ~CORE_MMU_PGDIR_MASK) &&
v <= (CFG_TEE_LOAD_ADDR | CORE_MMU_PGDIR_MASK)) {
struct core_mmu_table_info *ti = &tee_pager_tbl_info;
uint32_t a;
/*
* Lookups in the page table managed by the pager is
* dangerous for addresses in the paged area as those pages
* changes all the time. But some ranges are safe,
* rw-locked areas when the page is populated for instance.
*/
core_mmu_get_entry(ti, core_mmu_va2idx(ti, v), &p, &a);
if (a & TEE_MATTR_VALID_BLOCK) {
paddr_t mask = ((1 << ti->shift) - 1);
p |= v & mask;
if (pa != p)
panic();
} else
if (pa)
panic();
return;
}
#endif
if (!core_va2pa_helper(va, &p)) {
if (pa != p)
panic();
} else {
if (pa)
panic();
}
}
