feat(drtm): retrieve DRTM features
Retrieved below DRTM features via DRTM_FEATURES SMC call -
1. TPM features
2. Minimum memory requirement
3. Boot PE ID
4. DMA protection
Change-Id: Ia6dc497259541ce30a6550afa35d95d9a9a366af
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
Signed-off-by: Lucian Paul-Trifu <lucian.paultrifu@gmail.com>
diff --git a/services/std_svc/drtm/drtm_main.c b/services/std_svc/drtm/drtm_main.c
index 843fc5d..867870b 100644
--- a/services/std_svc/drtm/drtm_main.c
+++ b/services/std_svc/drtm/drtm_main.c
@@ -119,6 +119,36 @@
return 0;
}
+static inline uint64_t drtm_features_tpm(void *ctx)
+{
+ SMC_RET2(ctx, 1ULL, /* TPM feature is supported */
+ plat_drtm_features.tpm_features);
+}
+
+static inline uint64_t drtm_features_mem_req(void *ctx)
+{
+ SMC_RET2(ctx, 1ULL, /* memory req Feature is supported */
+ plat_drtm_features.minimum_memory_requirement);
+}
+
+static inline uint64_t drtm_features_boot_pe_id(void *ctx)
+{
+ SMC_RET2(ctx, 1ULL, /* Boot PE feature is supported */
+ plat_drtm_features.boot_pe_id);
+}
+
+static inline uint64_t drtm_features_dma_prot(void *ctx)
+{
+ SMC_RET2(ctx, 1ULL, /* DMA protection feature is supported */
+ plat_drtm_features.dma_prot_features);
+}
+
+static inline uint64_t drtm_features_tcb_hashes(void *ctx)
+{
+ SMC_RET2(ctx, 1ULL, /* TCB hash feature is supported */
+ plat_drtm_features.tcb_hash_features);
+}
+
uint64_t drtm_smc_handler(uint32_t smc_fid,
uint64_t x1,
uint64_t x2,
@@ -192,6 +222,43 @@
SMC_RET1(handle, NOT_SUPPORTED);
break; /* not reached */
}
+ } else {
+ /* Dispatch feature-based queries. */
+ switch (x1 & ARM_DRTM_FEAT_ID_MASK) {
+ case ARM_DRTM_FEATURES_TPM:
+ INFO("++ DRTM service handler: TPM features\n");
+ return drtm_features_tpm(handle);
+ break; /* not reached */
+
+ case ARM_DRTM_FEATURES_MEM_REQ:
+ INFO("++ DRTM service handler: Min. mem."
+ " requirement features\n");
+ return drtm_features_mem_req(handle);
+ break; /* not reached */
+
+ case ARM_DRTM_FEATURES_DMA_PROT:
+ INFO("++ DRTM service handler: "
+ "DMA protection features\n");
+ return drtm_features_dma_prot(handle);
+ break; /* not reached */
+
+ case ARM_DRTM_FEATURES_BOOT_PE_ID:
+ INFO("++ DRTM service handler: "
+ "Boot PE ID features\n");
+ return drtm_features_boot_pe_id(handle);
+ break; /* not reached */
+
+ case ARM_DRTM_FEATURES_TCB_HASHES:
+ INFO("++ DRTM service handler: "
+ "TCB-hashes features\n");
+ return drtm_features_tcb_hashes(handle);
+ break; /* not reached */
+
+ default:
+ ERROR("Unknown ARM DRTM service feature\n");
+ SMC_RET1(handle, NOT_SUPPORTED);
+ break; /* not reached */
+ }
}
case ARM_DRTM_SVC_UNPROTECT_MEM: