qemu: Support optional encryption of BL31 and BL32 images
Enable encryption IO layer to be stacked above FIP IO layer for optional
encryption of Bl31 and BL32 images in case ENCRYPT_BL31 or ENCRYPT_BL32
build flag is set.
Signed-off-by: Sumit Garg <sumit.garg@linaro.org>
Change-Id: I24cba64728861e833abffc3d5d9807599c49feb6
diff --git a/plat/qemu/common/qemu_io_storage.c b/plat/qemu/common/qemu_io_storage.c
index 0e81cd1..1107e44 100644
--- a/plat/qemu/common/qemu_io_storage.c
+++ b/plat/qemu/common/qemu_io_storage.c
@@ -12,6 +12,7 @@
#include <common/bl_common.h>
#include <common/debug.h>
#include <drivers/io/io_driver.h>
+#include <drivers/io/io_encrypted.h>
#include <drivers/io/io_fip.h>
#include <drivers/io/io_memmap.h>
#include <drivers/io/io_semihosting.h>
@@ -47,6 +48,10 @@
static uintptr_t memmap_dev_handle;
static const io_dev_connector_t *sh_dev_con;
static uintptr_t sh_dev_handle;
+#ifndef DECRYPTION_SUPPORT_none
+static const io_dev_connector_t *enc_dev_con;
+static uintptr_t enc_dev_handle;
+#endif
static const io_block_spec_t fip_block_spec = {
.offset = PLAT_QEMU_FIP_BASE,
@@ -172,10 +177,11 @@
#endif /* TRUSTED_BOARD_BOOT */
};
-
-
static int open_fip(const uintptr_t spec);
static int open_memmap(const uintptr_t spec);
+#ifndef DECRYPTION_SUPPORT_none
+static int open_enc_fip(const uintptr_t spec);
+#endif
struct plat_io_policy {
uintptr_t *dev_handle;
@@ -190,16 +196,46 @@
(uintptr_t)&fip_block_spec,
open_memmap
},
+ [ENC_IMAGE_ID] = {
+ &fip_dev_handle,
+ (uintptr_t)NULL,
+ open_fip
+ },
[BL2_IMAGE_ID] = {
&fip_dev_handle,
(uintptr_t)&bl2_uuid_spec,
open_fip
},
+#if ENCRYPT_BL31 && !defined(DECRYPTION_SUPPORT_none)
+ [BL31_IMAGE_ID] = {
+ &enc_dev_handle,
+ (uintptr_t)&bl31_uuid_spec,
+ open_enc_fip
+ },
+#else
[BL31_IMAGE_ID] = {
&fip_dev_handle,
(uintptr_t)&bl31_uuid_spec,
open_fip
},
+#endif
+#if ENCRYPT_BL32 && !defined(DECRYPTION_SUPPORT_none)
+ [BL32_IMAGE_ID] = {
+ &enc_dev_handle,
+ (uintptr_t)&bl32_uuid_spec,
+ open_enc_fip
+ },
+ [BL32_EXTRA1_IMAGE_ID] = {
+ &enc_dev_handle,
+ (uintptr_t)&bl32_extra1_uuid_spec,
+ open_enc_fip
+ },
+ [BL32_EXTRA2_IMAGE_ID] = {
+ &enc_dev_handle,
+ (uintptr_t)&bl32_extra2_uuid_spec,
+ open_enc_fip
+ },
+#else
[BL32_IMAGE_ID] = {
&fip_dev_handle,
(uintptr_t)&bl32_uuid_spec,
@@ -215,6 +251,7 @@
(uintptr_t)&bl32_extra2_uuid_spec,
open_fip
},
+#endif
[BL33_IMAGE_ID] = {
&fip_dev_handle,
(uintptr_t)&bl33_uuid_spec,
@@ -271,7 +308,7 @@
/* See if a Firmware Image Package is available */
result = io_dev_init(fip_dev_handle, (uintptr_t)FIP_IMAGE_ID);
- if (result == 0) {
+ if (result == 0 && spec != (uintptr_t)NULL) {
result = io_open(fip_dev_handle, spec, &local_image_handle);
if (result == 0) {
VERBOSE("Using FIP\n");
@@ -281,6 +318,25 @@
return result;
}
+#ifndef DECRYPTION_SUPPORT_none
+static int open_enc_fip(const uintptr_t spec)
+{
+ int result;
+ uintptr_t local_image_handle;
+
+ /* See if an encrypted FIP is available */
+ result = io_dev_init(enc_dev_handle, (uintptr_t)ENC_IMAGE_ID);
+ if (result == 0) {
+ result = io_open(enc_dev_handle, spec, &local_image_handle);
+ if (result == 0) {
+ VERBOSE("Using encrypted FIP\n");
+ io_close(local_image_handle);
+ }
+ }
+ return result;
+}
+#endif
+
static int open_memmap(const uintptr_t spec)
{
int result;
@@ -333,6 +389,15 @@
&memmap_dev_handle);
assert(io_result == 0);
+#ifndef DECRYPTION_SUPPORT_none
+ io_result = register_io_dev_enc(&enc_dev_con);
+ assert(io_result == 0);
+
+ io_result = io_dev_open(enc_dev_con, (uintptr_t)NULL,
+ &enc_dev_handle);
+ assert(io_result == 0);
+#endif
+
/* Register the additional IO devices on this platform */
io_result = register_io_dev_sh(&sh_dev_con);
assert(io_result == 0);