feat(fvp): add platform hooks for DRTM DMA protection

Added necessary platform hooks for DRTM DMA protection.
These calls will be used by the subsequent DRTM implementation
patches.
DRTM platform API declarations have been listed down in a
separate header file.

Signed-off-by: Manish V Badarkhe <manish.badarkhe@arm.com>
Signed-off-by: Lucian Paul-Trifu <lucian.paultrifu@gmail.com>
Change-Id: Ib9726d1d3570800241bde702ee7006a64f1739ec

diff --git a/include/plat/common/plat_drtm.h b/include/plat/common/plat_drtm.h
new file mode 100644 (file)
index 0000000..3c4e3d5
--- /dev/null
+++ b/include/plat/common/plat_drtm.h
@@ -0,0 +1,17 @@
+/*
+ * Copyright (c) 2022, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef PLAT_DRTM_H
+#define PLAT_DRTM_H
+
+/* platform-specific DMA protection functions */
+bool plat_has_non_host_platforms(void);
+bool plat_has_unmanaged_dma_peripherals(void);
+unsigned int plat_get_total_smmus(void);
+void plat_enumerate_smmus(const uintptr_t **smmus_out,
+                         size_t *smmu_count_out);
+
+#endif /* PLAT_DRTM_H */

diff --git a/include/plat/common/platform.h b/include/plat/common/platform.h
index da7462467c28fd5def9233dc83a7745ace8de811..58e08d4aa5518a7d3314c1a00defe89eeb25df12 100644 (file)
--- a/include/plat/common/platform.h
+++ b/include/plat/common/platform.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2022, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2013-2022, Arm Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -20,6 +20,9 @@
 #include "plat_trng.h"
 #endif
 #include <drivers/fwu/fwu_metadata.h>
+#if DRTM_SUPPORT
+#include "plat_drtm.h"
+#endif /* DRTM_SUPPORT */
 
 /*******************************************************************************
  * Forward declarations

diff --git a/plat/arm/board/fvp/fvp_drtm_dma_prot.c b/plat/arm/board/fvp/fvp_drtm_dma_prot.c
new file mode 100644 (file)
index 0000000..ec9cd7a
--- /dev/null
+++ b/plat/arm/board/fvp/fvp_drtm_dma_prot.c
@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2022, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <stdbool.h>
+#include <stddef.h>
+
+#include <drivers/arm/smmu_v3.h>
+#include <lib/utils_def.h>
+#include <plat/arm/common/arm_config.h>
+#include <plat/common/platform.h>
+
+#include <platform_def.h>
+
+/**
+ * Array mentioning number of SMMUs supported by FVP
+ */
+static const uintptr_t fvp_smmus[] = {
+       PLAT_FVP_SMMUV3_BASE,
+};
+
+bool plat_has_non_host_platforms(void)
+{
+       /* FVP base platforms typically have GPU, as per FVP Reference guide */
+       return true;
+}
+
+bool plat_has_unmanaged_dma_peripherals(void)
+{
+       /*
+        * FVP Reference guide does not show devices that are described as
+        * DMA-capable but not managed by an SMMU in the FVP documentation.
+        * However, the SMMU seems to have only been introduced in the RevC
+        * revision.
+        */
+       return (arm_config.flags & ARM_CONFIG_FVP_HAS_SMMUV3) == 0;
+}
+
+unsigned int plat_get_total_smmus(void)
+{
+       if ((arm_config.flags & ARM_CONFIG_FVP_HAS_SMMUV3) != 0U) {
+               return ARRAY_SIZE(fvp_smmus);
+       } else {
+               return 0;
+       }
+}
+
+void plat_enumerate_smmus(const uintptr_t **smmus_out,
+                         size_t *smmu_count_out)
+{
+       if ((arm_config.flags & ARM_CONFIG_FVP_HAS_SMMUV3) != 0U) {
+               *smmus_out = fvp_smmus;
+               *smmu_count_out = ARRAY_SIZE(fvp_smmus);
+       } else {
+               *smmus_out = NULL;
+               *smmu_count_out = 0;
+       }
+}

diff --git a/plat/arm/board/fvp/platform.mk b/plat/arm/board/fvp/platform.mk
index a20343b356030d33d4afe1307f0fb16e18acd863..811b2754b76d65e78c114c1b7f3a17e159c999f7 100644 (file)
--- a/plat/arm/board/fvp/platform.mk
+++ b/plat/arm/board/fvp/platform.mk
@@ -413,6 +413,10 @@ endif
 
 endif
 
+ifeq (${DRTM_SUPPORT}, 1)
+BL31_SOURCES   += plat/arm/board/fvp/fvp_drtm_dma_prot.c
+endif
+
 ifeq (${TRUSTED_BOARD_BOOT}, 1)
 BL1_SOURCES            +=      plat/arm/board/fvp/fvp_trusted_boot.c
 BL2_SOURCES            +=      plat/arm/board/fvp/fvp_trusted_boot.c