return SUCCESS;
}
+static enum drtm_retc drtm_dl_prepare_dlme_data(const struct_drtm_dl_args *args,
+ size_t *dlme_data_size_out)
+{
+ size_t dlme_data_total_bytes_req = 0;
+
+ *dlme_data_size_out = dlme_data_total_bytes_req;
+
+ return SUCCESS;
+}
+
+/*
+ * Note: accesses to the dynamic launch args, and to the DLME data are
+ * little-endian as required, thanks to TF-A BL31 init requirements.
+ */
+static enum drtm_retc drtm_dl_check_args(uint64_t x1,
+ struct_drtm_dl_args *a_out)
+{
+ uint64_t dlme_start, dlme_end;
+ uint64_t dlme_img_start, dlme_img_ep, dlme_img_end;
+ uint64_t dlme_data_start, dlme_data_end;
+ uintptr_t args_mapping;
+ size_t args_mapping_size;
+ struct_drtm_dl_args *a;
+ struct_drtm_dl_args args_buf;
+ size_t dlme_data_size_req;
+ int rc;
+
+ if (x1 % DRTM_PAGE_SIZE != 0) {
+ ERROR("DRTM: parameters structure is not "
+ DRTM_PAGE_SIZE_STR "-aligned\n");
+ return INVALID_PARAMETERS;
+ }
+
+ args_mapping_size = ALIGNED_UP(sizeof(struct_drtm_dl_args), DRTM_PAGE_SIZE);
+ rc = mmap_add_dynamic_region_alloc_va(x1, &args_mapping, args_mapping_size,
+ MT_MEMORY | MT_NS | MT_RO |
+ MT_SHAREABILITY_ISH);
+ if (rc != 0) {
+ WARN("DRTM: %s: mmap_add_dynamic_region() failed rc=%d\n",
+ __func__, rc);
+ return INTERNAL_ERROR;
+ }
+ a = (struct_drtm_dl_args *)args_mapping;
+ /*
+ * TODO: invalidate all data cache before reading the data passed by the
+ * DCE Preamble. This is required to avoid / defend against racing with
+ * cache evictions.
+ */
+ args_buf = *a;
+
+ rc = mmap_remove_dynamic_region(args_mapping, args_mapping_size);
+ if (rc) {
+ ERROR("%s(): mmap_remove_dynamic_region() failed unexpectedly"
+ " rc=%d\n", __func__, rc);
+ panic();
+ }
+ a = &args_buf;
+
+ if (a->version != 1) {
+ ERROR("DRTM: parameters structure incompatible with major version %d\n",
+ ARM_DRTM_VERSION_MAJOR);
+ return NOT_SUPPORTED;
+ }
+
+ if (!(a->dlme_img_off < a->dlme_size &&
+ a->dlme_data_off < a->dlme_size)) {
+ ERROR("DRTM: argument offset is outside of the DLME region\n");
+ return INVALID_PARAMETERS;
+ }
+ dlme_start = a->dlme_paddr;
+ dlme_end = a->dlme_paddr + a->dlme_size;
+ dlme_img_start = a->dlme_paddr + a->dlme_img_off;
+ dlme_img_ep = dlme_img_start + a->dlme_img_ep_off;
+ dlme_img_end = dlme_img_start + a->dlme_img_size;
+ dlme_data_start = a->dlme_paddr + a->dlme_data_off;
+ dlme_data_end = dlme_end;
+
+ /*
+ * TODO: validate that the DLME physical address range is all NS memory,
+ * return INVALID_PARAMETERS if it is not.
+ * Note that this check relies on platform-specific information. For
+ * examples, see psci_plat_pm_ops->validate_ns_entrypoint() or
+ * arm_validate_ns_entrypoint().
+ */
+
+ /* Check the DLME regions arguments. */
+ if ((dlme_start % DRTM_PAGE_SIZE) != 0) {
+ ERROR("DRTM: argument DLME region is not "
+ DRTM_PAGE_SIZE_STR "-aligned\n");
+ return INVALID_PARAMETERS;
+ }
+
+ if (!(dlme_start < dlme_end &&
+ dlme_start <= dlme_img_start && dlme_img_start < dlme_img_end &&
+ dlme_start <= dlme_data_start && dlme_data_start < dlme_data_end)) {
+ ERROR("DRTM: argument DLME region is discontiguous\n");
+ return INVALID_PARAMETERS;
+ }
+
+ if (dlme_img_start < dlme_data_end && dlme_data_start < dlme_img_end) {
+ ERROR("DRTM: argument DLME regions overlap\n");
+ return INVALID_PARAMETERS;
+ }
+
+ /* Check the DLME image region arguments. */
+ if ((dlme_img_start % DRTM_PAGE_SIZE) != 0) {
+ ERROR("DRTM: argument DLME image region is not "
+ DRTM_PAGE_SIZE_STR "-aligned\n");
+ return INVALID_PARAMETERS;
+ }
+
+ if (!(dlme_img_start <= dlme_img_ep && dlme_img_ep < dlme_img_end)) {
+ ERROR("DRTM: DLME entry point is outside of the DLME image region\n");
+ return INVALID_PARAMETERS;
+ }
+
+ if ((dlme_img_ep % 4) != 0) {
+ ERROR("DRTM: DLME image entry point is not 4-byte-aligned\n");
+ return INVALID_PARAMETERS;
+ }
+
+ /* Check the DLME data region arguments. */
+ if ((dlme_data_start % DRTM_PAGE_SIZE) != 0) {
+ ERROR("DRTM: argument DLME data region is not "
+ DRTM_PAGE_SIZE_STR "-aligned\n");
+ return INVALID_PARAMETERS;
+ }
+
+ rc = drtm_dl_prepare_dlme_data(NULL, &dlme_data_size_req);
+ if (rc) {
+ ERROR("%s: drtm_dl_prepare_dlme_data() failed unexpectedly rc=%d\n",
+ __func__, rc);
+ panic();
+ }
+ if (dlme_data_end - dlme_data_start < dlme_data_size_req) {
+ ERROR("DRTM: argument DLME data region is short of %lu bytes\n",
+ dlme_data_size_req - (size_t)(dlme_data_end - dlme_data_start));
+ return INVALID_PARAMETERS;
+ }
+
+ /* Check the Normal World DCE region arguments. */
+ if (a->dce_nwd_paddr != 0) {
+ uint32_t dce_nwd_start = a->dce_nwd_paddr;
+ uint32_t dce_nwd_end = dce_nwd_start + a->dce_nwd_size;
+
+ if (!(dce_nwd_start < dce_nwd_end)) {
+ ERROR("DRTM: argument Normal World DCE region is dicontiguous\n");
+ return INVALID_PARAMETERS;
+ }
+
+ if (dce_nwd_start < dlme_end && dlme_start < dce_nwd_end) {
+ ERROR("DRTM: argument Normal World DCE regions overlap\n");
+ return INVALID_PARAMETERS;
+ }
+ }
+
+ *a_out = *a;
+ return SUCCESS;
+}
+
static uint64_t drtm_dynamic_launch(uint64_t x1, void *handle)
{
enum drtm_retc ret = SUCCESS;
+ struct_drtm_dl_args args;
/* Ensure that only boot PE is powered on */
ret = drtm_dl_check_cores();
SMC_RET1(handle, ret);
}
+ ret = drtm_dl_check_args(x1, &args);
+ if (ret != SUCCESS) {
+ SMC_RET1(handle, ret);
+ }
+
SMC_RET1(handle, ret);
}
#include <stdint.h>
+#include <assert.h>
#include <lib/smccc.h>
#include "drtm_dma_prot.h"
+#define ALIGNED_UP(x, a) __extension__ ({ \
+ __typeof__(a) _a = (a); \
+ __typeof__(a) _one = 1; \
+ assert(IS_POWER_OF_TWO(_a)); \
+ ((x) + (_a - _one)) & ~(_a - _one); \
+})
+
+#define ALIGNED_DOWN(x, a) __extension__ ({ \
+ __typeof__(a) _a = (a); \
+ __typeof__(a) _one = 1; \
+ assert(IS_POWER_OF_TWO(_a)); \
+ (x) & ~(_a - _one); \
+})
+
+#define DRTM_PAGE_SIZE (4 * (1 << 10))
+#define DRTM_PAGE_SIZE_STR "4-KiB"
+
enum drtm_retc {
SUCCESS = SMC_OK,
NOT_SUPPORTED = SMC_UNK,
uint64_t tcb_hash_features;
} drtm_features_t;
+struct __packed drtm_dl_args_v1 {
+ uint16_t version; /* Must be 1. */
+ uint8_t __res[2];
+ uint32_t features;
+ uint64_t dlme_paddr;
+ uint64_t dlme_size;
+ uint64_t dlme_img_off;
+ uint64_t dlme_img_ep_off;
+ uint64_t dlme_img_size;
+ uint64_t dlme_data_off;
+ uint64_t dce_nwd_paddr;
+ uint64_t dce_nwd_size;
+ drtm_dl_dma_prot_args_v1_t dma_prot_args;
+} __aligned(__alignof(uint16_t /* First member's type, `uint16_t version' */));
+
drtm_memory_region_descriptor_table_t *drtm_build_address_map(void);
uint64_t drtm_get_address_map_size(void);
+/*
+ * Version-independent type. May be used to avoid excessive line of code
+ * changes when migrating to new struct versions.
+ */
+typedef struct drtm_dl_args_v1 struct_drtm_dl_args;
+
#endif /* DRTM_MAIN_H */
projects / arm-tf.git / commitdiff