commit 3db437aaf9bd67357ca1942227dcac2a4299d9df
author Mate Toth-Pal <mate.toth-pal@arm.com> Fri Jun 22 16:15:13 2018 +0200
committer Mate Toth-Pal <mate.toth-pal@arm.com> Fri Jan 04 10:50:57 2019 +0100
tree 2f194edfffbb5d062f1cd97884551a3a1c5f8710
parent b8ce0ddf88a2bb5b9e421b2df2be3ad65e591a5b

Core: Save iovec in SPM database

For each secure service call save the iovec parameters in the
partition's runtime context.
When the secure function is called, the saved iovec arguments are
passed to it on the called partition's stack.

Change-Id: I754dc330db907ce8c16d425ac9c017b53301a6b9
Signed-off-by: Mate Toth-Pal <mate.toth-pal@arm.com>

secure_fw/spm/spm_api.c

diff --git a/secure_fw/spm/spm_api.c b/secure_fw/spm/spm_api.c
index d95bee4..d520786 100644
--- a/secure_fw/spm/spm_api.c
+++ b/secure_fw/spm/spm_api.c
@@ -310,6 +310,28 @@
     return ret;
 }
 
+void tfm_spm_partition_set_iovec(uint32_t partition_idx, int32_t *args)
+{
+    struct spm_partition_runtime_data_t *runtime_data =
+            &g_spm_partition_db.partitions[partition_idx].runtime_data;
+    int32_t i;
+
+    runtime_data->iovec_args.in_len = args[1];
+    for (i = 0; i < runtime_data->iovec_args.in_len; ++i) {
+        runtime_data->iovec_args.in_vec[i].base =
+                                                 ((psa_invec *)args[0])[i].base;
+        runtime_data->iovec_args.in_vec[i].len = ((psa_invec *)args[0])[i].len;
+    }
+    runtime_data->iovec_args.out_len = args[3];
+    for (i = 0; i < runtime_data->iovec_args.out_len; ++i) {
+        runtime_data->iovec_args.out_vec[i].base =
+                                                ((psa_outvec *)args[2])[i].base;
+        runtime_data->iovec_args.out_vec[i].len =
+                                                 ((psa_outvec *)args[2])[i].len;
+    }
+    runtime_data->orig_outvec = (psa_outvec *)args[2];
+}
+
 uint32_t tfm_spm_partition_get_running_partition_idx(void)
 {
     return g_spm_partition_db.running_partition_idx;
@@ -319,6 +341,19 @@
 {
     struct spm_partition_desc_t *partition =
             &(g_spm_partition_db.partitions[partition_idx]);
+    int32_t i;
+
     partition->runtime_data.caller_partition_idx = SPM_INVALID_PARTITION_IDX;
     partition->runtime_data.share = 0;
+    partition->runtime_data.iovec_args.in_len = 0;
+    for (i = 0; i < PSA_MAX_IOVEC; ++i) {
+        partition->runtime_data.iovec_args.in_vec[i].base = 0;
+        partition->runtime_data.iovec_args.in_vec[i].len = 0;
+    }
+    partition->runtime_data.iovec_args.out_len = 0;
+    for (i = 0; i < PSA_MAX_IOVEC; ++i) {
+        partition->runtime_data.iovec_args.out_vec[i].base = 0;
+        partition->runtime_data.iovec_args.out_vec[i].len = 0;
+    }
+    partition->runtime_data.orig_outvec = 0;
 }