feat: tftf realm extension
This patch adds Realm payload management capabilities to TFTF
to act as a NS Host, it includes creation and destruction of a Realm,
mapping of protected data and creation of all needed RTT levels,
sharing of NS memory buffer from Host to Realm by mapping of
unprotected IPA, create REC and auxiliary granules, exit Realm
using RSI_HOST_CALL ABI.
Older realm_payload name is used now for only R-EL1 test cases,
RMI and SPM test cases have been moved to new file tests-rmi-spm.
New TFTF_MAX_IMAGE_SIZE argument added to FVP platform.mk,
as an offset from where R-EL1 payload memory resources start.
Signed-off-by: Nabil Kahlouche <nabil.kahlouche@arm.com>
Change-Id: Ida4cfd334795879d55924bb33b9b77182a3dcef7
diff --git a/realm/realm_rsi.c b/realm/realm_rsi.c
new file mode 100644
index 0000000..c805514
--- /dev/null
+++ b/realm/realm_rsi.c
@@ -0,0 +1,47 @@
+
+/*
+ * Copyright (c) 2022, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ */
+
+#include <host_realm_rmi.h>
+#include <lib/aarch64/arch_features.h>
+#include <realm_rsi.h>
+#include <smccc.h>
+
+static struct rsi_host_call host_cal __aligned(sizeof(struct rsi_host_call));
+
+/* This function return RSI_ABI_VERSION */
+u_register_t rsi_get_version(void)
+{
+ smc_ret_values res = {};
+
+ res = tftf_smc(&(smc_args)
+ {RSI_ABI_VERSION, 0UL, 0UL, 0UL, 0UL, 0UL, 0UL, 0UL});
+
+ return res.ret0;
+}
+
+/* This function will call the Host to request IPA of the NS shared buffer */
+u_register_t rsi_get_ns_buffer(void)
+{
+ smc_ret_values res = {};
+
+ host_cal.imm = HOST_CALL_GET_SHARED_BUFF_CMD;
+ res = tftf_smc(&(smc_args) {RSI_HOST_CALL, (u_register_t)&host_cal,
+ 0UL, 0UL, 0UL, 0UL, 0UL, 0UL});
+ if (res.ret0 != RSI_SUCCESS) {
+ return 0U;
+ }
+ return host_cal.gprs[0];
+}
+
+/* This function call Host and request to exit Realm with proper exit code */
+void rsi_exit_to_host(enum host_call_cmd exit_code)
+{
+ host_cal.imm = exit_code;
+ tftf_smc(&(smc_args) {RSI_HOST_CALL, (u_register_t)&host_cal,
+ 0UL, 0UL, 0UL, 0UL, 0UL, 0UL});
+}