Add SSE-310 PIDR and CIDR registers. Add sys_config2 register and
always report 0 on read as we do not implement the NPU.

Reviewed-by: Owen Giles <owen.giles@hpe.com>
Reviewed-by: Robert Elliott <elliott@hpe.com>
Signed-off-by: Simon Xu <simonxhy0404@gmail.com>
---
v1 -> v2
	Hard code sys_config2 to return 0 as we don't implement NPU0
---
 hw/misc/iotkit-sysinfo.c | 22 +++++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

diff --git a/hw/misc/iotkit-sysinfo.c b/hw/misc/iotkit-sysinfo.c
index 19f089e6ee..f3d07f3247 100644
--- a/hw/misc/iotkit-sysinfo.c
+++ b/hw/misc/iotkit-sysinfo.c
@@ -31,6 +31,7 @@
 REG32(SYS_VERSION, 0x0)
 REG32(SYS_CONFIG, 0x4)
 REG32(SYS_CONFIG1, 0x8)
+REG32(SYS_CONFIG2, 0xc)
 REG32(IIDR, 0xfc8)
 REG32(PID4, 0xfd0)
 REG32(PID5, 0xfd4)
@@ -58,6 +59,12 @@ static const int sysinfo_sse300_id[] = {
     0x0d, 0xf0, 0x05, 0xb1, /* CID0..CID3 */
 };
 
+static const int sysinfo_sse310_id[] = {
+    0x04, 0x00, 0x00, 0x00, /* PID4..PID7 */
+    0x58, 0xb8, 0x2b, 0x00, /* PID0..PID3 */
+    0x0d, 0xf0, 0x05, 0xb1, /* CID0..CID3 */
+};
+
 static uint64_t iotkit_sysinfo_read(void *opaque, hwaddr offset,
                                     unsigned size)
 {
@@ -68,13 +75,22 @@ static uint64_t iotkit_sysinfo_read(void *opaque, hwaddr offset,
     case A_SYS_VERSION:
         r = s->sys_version;
         break;
-
     case A_SYS_CONFIG:
         r = s->sys_config;
         break;
     case A_SYS_CONFIG1:
         switch (s->sse_version) {
         case ARMSSE_SSE300:
+        case ARMSSE_SSE310:
+            return 0;
+            break;
+        default:
+            goto bad_read;
+        }
+        break;
+    case A_SYS_CONFIG2:
+        switch (s->sse_version) {
+        case ARMSSE_SSE310:
             return 0;
             break;
         default:
@@ -84,6 +100,7 @@ static uint64_t iotkit_sysinfo_read(void *opaque, hwaddr offset,
     case A_IIDR:
         switch (s->sse_version) {
         case ARMSSE_SSE300:
+        case ARMSSE_SSE310:
             return s->iidr;
             break;
         default:
@@ -95,6 +112,9 @@ static uint64_t iotkit_sysinfo_read(void *opaque, hwaddr offset,
         case ARMSSE_SSE300:
             r = sysinfo_sse300_id[(offset - A_PID4) / 4];
             break;
+        case ARMSSE_SSE310:
+            r = sysinfo_sse310_id[(offset - A_PID4) / 4];
+            break;
         default:
             r = sysinfo_id[(offset - A_PID4) / 4];
             break;
-- 
2.53.0

On Wed, 5 Aug 2026 at 16:30, Simon Xu <simonxhy0404@gmail.com> wrote:
>
> Add SSE-310 PIDR and CIDR registers. Add sys_config2 register and
> always report 0 on read as we do not implement the NPU.
>
> Reviewed-by: Owen Giles <owen.giles@hpe.com>
> Reviewed-by: Robert Elliott <elliott@hpe.com>
> Signed-off-by: Simon Xu <simonxhy0404@gmail.com>

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>

thanks
-- PMM