1. Disabled by default. Uncomment "#define DEBUG_HACE 1" to enable it.
2. Uses the "qemu_hexdump" API to dump the digest result.
3. Uses the "iov_hexdump" API to dump the source vector, which contains the
   source plaintext.

Signed-off-by: Jamin Lin <jamin_lin@aspeedtech.com>
---
 hw/misc/aspeed_hace.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/hw/misc/aspeed_hace.c b/hw/misc/aspeed_hace.c
index b8e473ee3f..ae4d2fa687 100644
--- a/hw/misc/aspeed_hace.c
+++ b/hw/misc/aspeed_hace.c
@@ -10,8 +10,10 @@
  */
 
 #include "qemu/osdep.h"
+#include "qemu/cutils.h"
 #include "qemu/log.h"
 #include "qemu/error-report.h"
+#include "qemu/iov.h"
 #include "hw/misc/aspeed_hace.h"
 #include "qapi/error.h"
 #include "migration/vmstate.h"
@@ -20,6 +22,8 @@
 #include "hw/irq.h"
 #include "trace.h"
 
+/* #define DEBUG_HACE 1 */
+
 #define R_CRYPT_CMD     (0x10 / 4)
 
 #define R_STATUS        (0x1c / 4)
@@ -268,6 +272,10 @@ static void do_hash_operation(AspeedHACEState *s, int algo, bool sg_mode,
         }
     }
 
+#ifdef DEBUG_HACE
+    iov_hexdump(iov, i, stdout, "plaintext", 0xa000);
+#endif
+
     if (acc_mode) {
         if (qcrypto_hash_updatev(s->hash_ctx, iov, i, &local_err) < 0) {
             qemu_log_mask(LOG_GUEST_ERROR, "qcrypto hash update failed : %s",
@@ -311,6 +319,10 @@ static void do_hash_operation(AspeedHACEState *s, int algo, bool sg_mode,
                       "aspeed_hace: address space write failed\n");
     }
 
+#ifdef DEBUG_HACE
+    qemu_hexdump(stdout, "digest", digest_buf, digest_len);
+#endif
+
     for (; i > 0; i--) {
         address_space_unmap(&s->dram_as, iov[i - 1].iov_base,
                             iov[i - 1].iov_len, false,
-- 
2.43.0