aspeed: Add AST2700 Huygens machine

Cédric Le Goater Thu, 16 Jul 2026 06:58:03 -0700

On 7/15/26 17:50, Mikail Sadic wrote:

Add support for the IBM Huygens BMC, based on the AST2700 A2 SoC.


You're keeping all the interesting info from us ! What is Huygens ?
a P11, P11+, P11-next, P12, Z ? Tell us more :)


Instantiate the AST2700 SoC with the devices and drives required
to boot Huygens OBMC Linux image on the Huygens platform.

Signed-off-by: Mikail Sadic <[email protected]>
---
  docs/system/arm/aspeed.rst      |  41 +++++-
  hw/arm/aspeed_ast27x0_huygens.c | 242 ++++++++++++++++++++++++++++++++
  hw/arm/meson.build              |   1 +
  3 files changed, 282 insertions(+), 2 deletions(-)
  create mode 100644 hw/arm/aspeed_ast27x0_huygens.c

diff --git a/docs/system/arm/aspeed.rst b/docs/system/arm/aspeed.rst
index 2d51ceeb84..32999d6284 100644
--- a/docs/system/arm/aspeed.rst
+++ b/docs/system/arm/aspeed.rst
@@ -271,8 +271,8 @@ configuration file for OTP memory:
      done > otpmem.img
    fi

-Aspeed 2700 family boards (``ast2700-evb``, ``ast2700fc``)

-==========================================================
+Aspeed 2700 family boards (``ast2700-evb``, ``ast2700fc``, ``huygens-bmc``)
+============================================================================

The QEMU Aspeed machines model BMCs of Aspeed evaluation boards.

  They are based on different releases of the Aspeed SoC :
@@ -285,6 +285,7 @@ AST2700 SoC based machines :

- ``ast2700-evb`` Aspeed AST2700 Evaluation board (Cortex-A35)

  - ``ast2700fc``            Aspeed AST2700 Evaluation board (Cortex-A35 + 
Cortex-M4)
+- ``huygens-bmc``          Aspeed AST2700 IBM Huygens POWER12 BMC


Ah ! Now we know :) We had guessed.

Supported devices

  -----------------
@@ -312,6 +313,8 @@ Supported devices
   * PECI Controller (minimal)
   * I3C Controller
   * Internal Bridge Controller (SLI dummy)
+ * UFS Host Controller (aspeed,ufshc-m31-16nm)


This might not be ready yet.

+ * FSI APB-to-OPB bridge with CFAM-S mailbox

Missing devices

  ---------------
@@ -440,6 +443,40 @@ Use ``tio`` or another terminal emulator to connect to the 
consoles:
     $ tio /dev/pts/56
     $ tio /dev/pts/57

+Booting the huygens-bmc machine

+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+The IBM Huygens BMC is based on the AST2700 A2 SoC. It boots from FMC

+(SPI NOR) flash and a UFS storage image.


What is on the and what is on UFS ?

Images can be built from the
+OpenBMC project tree.


A functional test with such images will be strongly appreciated.

+
+To boot the machine from flash and UFS storage:
+
+.. code-block:: bash
+
+  $ qemu-system-aarch64 -M huygens-bmc \
+        -drive file=image-bmc,if=mtd,format=raw \
+        -drive file=ufs.img,if=none,format=raw \



hmm, we have been trying to remove the -drive command line option
for years now. Please use blockdev instead.

+        -nographic
+
+The ``if=none`` interface is required for the UFS drive. The Aspeed UFS host
+controller picks up the first ``IF_NONE`` block device at index 0.
+
+The machine instantiates three ``ftgmac100`` Ethernet controllers. To
+expose them with port forwarding:
+
+.. code-block:: bash
+
+  $ qemu-system-aarch64 -M huygens-bmc \
+        -drive file=image-bmc,if=mtd,format=raw \
+        -drive file=ufs.img,if=none,format=raw \
+        -nic user,model=ftgmac100 \
+        -nic user,model=ftgmac100 \
+        -nic user,model=ftgmac100 \



I don't think you need to repeat the command line and 'model=ftgmac100'
seems useless.

+        -nographic
+
+The default BMC console is ``uart12``.
+

Aspeed Bridge IC and Platform Root of Trust processor family boards (``ast1030-evb``, ``ast1040-evb``, ``ast1060-evb``)

  
=======================================================================================================================
diff --git a/hw/arm/aspeed_ast27x0_huygens.c b/hw/arm/aspeed_ast27x0_huygens.c
new file mode 100644
index 0000000000..951008c310
--- /dev/null
+++ b/hw/arm/aspeed_ast27x0_huygens.c
@@ -0,0 +1,242 @@
+/*
+ * IBM Huygens
+ *
+ * Copyright 2026 IBM Corp.
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "qemu/osdep.h"
+#include "qapi/error.h"
+#include "hw/arm/machines-qom.h"
+#include "hw/arm/aspeed.h"
+#include "hw/arm/aspeed_soc.h"
+#include "hw/nvram/eeprom_at24c.h"
+#include "hw/i2c/i2c_mux_pca954x.h"
+#include "hw/sensor/tmp105.h"
+
+/* SCU HW Strap1 */
+#define HUYGENS_BMC_HW_STRAP1 0x00000800
+/* SCUIO HW Strap1 */
+#define HUYGENS_BMC_HW_STRAP2 0x00000700
+
+/*
+ * 2048-byte IPZ VPD image:
+ * VHDR, VTOC, VINI, VMPU, VSBP, VSYS, UTIL, DINF, VCEN + ECC
+ */
+static const uint8_t huygens_bmc_fruid[] = {
+    0x00, 0x0f, 0x17, 0xba, 0x3a, 0xc9, 0x32, 0x31, 0x49, 0xb2, 0xde, 0x84,
+    0x28, 0x00, 0x52, 0x54, 0x04, 0x56, 0x48, 0x44, 0x52, 0x56, 0x44, 0x02,
+    0x30, 0x31, 0x50, 0x54, 0x0e, 0x56, 0x54, 0x4f, 0x43, 0xd5, 0x00, 0x37,
+    0x00, 0x74, 0x00, 0xa6, 0x05, 0x1d, 0x00, 0x50, 0x46, 0x08, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x78, 0x84, 0x70, 0x00, 0x52, 0x54,
+    0x04, 0x56, 0x54, 0x4f, 0x43, 0x50, 0x54, 0x62, 0x56, 0x49, 0x4e, 0x49,
+    0xd5, 0x00, 0xab, 0x00, 0x84, 0x00, 0x85, 0x05, 0x21, 0x00, 0x56, 0x4d,
+    0x50, 0x55, 0xff, 0x00, 0x2f, 0x01, 0xa4, 0x00, 0x5c, 0x05, 0x29, 0x00,
+    0x56, 0x53, 0x42, 0x50, 0xff, 0x00, 0xd3, 0x01, 0x30, 0x00, 0x50, 0x05,
+    0x0c, 0x00, 0x56, 0x53, 0x59, 0x53, 0xff, 0x00, 0x03, 0x02, 0x44, 0x01,
+    0xff, 0x04, 0x51, 0x00, 0x55, 0x54, 0x49, 0x4c, 0xff, 0x00, 0x47, 0x03,
+    0xe8, 0x00, 0xc5, 0x04, 0x3a, 0x00, 0x44, 0x49, 0x4e, 0x46, 0xff, 0x00,
+    0x2f, 0x04, 0x30, 0x00, 0xb9, 0x04, 0x0c, 0x00, 0x56, 0x43, 0x45, 0x4e,
+    0xff, 0x00, 0x5f, 0x04, 0x48, 0x00, 0xa7, 0x04, 0x12, 0x00, 0x50, 0x46,
+    0x01, 0x00, 0x78, 0x84, 0x80, 0x00, 0x52, 0x54, 0x04, 0x56, 0x49, 0x4e,
+    0x49, 0x44, 0x52, 0x10, 0x51, 0x45, 0x4d, 0x55, 0x20, 0x48, 0x55, 0x59,
+    0x47, 0x45, 0x4e, 0x53, 0x20, 0x42, 0x4d, 0x43, 0x43, 0x45, 0x01, 0x20,
+    0x56, 0x5a, 0x02, 0x20, 0x20, 0x46, 0x4e, 0x07, 0x20, 0x20, 0x20, 0x20,
+    0x20, 0x20, 0x20, 0x50, 0x4e, 0x07, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
+    0x20, 0x53, 0x4e, 0x0c, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
+    0x20, 0x20, 0x20, 0x20, 0x43, 0x43, 0x04, 0x20, 0x20, 0x20, 0x20, 0x48,
+    0x45, 0x04, 0x20, 0x20, 0x20, 0x20, 0x43, 0x54, 0x04, 0x00, 0x00, 0x00,
+    0x00, 0x48, 0x57, 0x02, 0x00, 0x01, 0x42, 0x33, 0x06, 0x20, 0x20, 0x20,
+    0x20, 0x20, 0x20, 0x42, 0x34, 0x01, 0x20, 0x42, 0x37, 0x0c, 0x20, 0x20,
+    0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x50, 0x46,
+    0x01, 0x00, 0x78, 0x84, 0xa0, 0x00, 0x52, 0x54, 0x04, 0x56, 0x4d, 0x50,
+    0x55, 0x56, 0x5a, 0x02, 0x30, 0x31, 0x53, 0x4f, 0x02, 0x00, 0x00, 0x44,
+    0x49, 0x04, 0x00, 0x00, 0x00, 0x00, 0x49, 0x4e, 0x80, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x50, 0x46, 0x02, 0x00, 0x00, 0x78, 0x84,
+    0x2c, 0x00, 0x52, 0x54, 0x04, 0x56, 0x53, 0x42, 0x50, 0x44, 0x52, 0x10,
+    0x56, 0x50, 0x44, 0x20, 0x52, 0x4f, 0x4f, 0x54, 0x20, 0x4e, 0x4f, 0x44,
+    0x45, 0x20, 0x20, 0x20, 0x50, 0x41, 0x01, 0x59, 0x49, 0x4d, 0x04, 0x70,
+    0x00, 0x10, 0x00, 0x50, 0x46, 0x04, 0x00, 0x00, 0x00, 0x00, 0x78, 0x84,
+    0x40, 0x01, 0x52, 0x54, 0x04, 0x56, 0x53, 0x59, 0x53, 0x44, 0x52, 0x06,
+    0x53, 0x59, 0x53, 0x54, 0x45, 0x4d, 0x42, 0x52, 0x02, 0x20, 0x20, 0x53,
+    0x45, 0x07, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x53, 0x47, 0x07,
+    0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x54, 0x4d, 0x08, 0x20, 0x20,
+    0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x54, 0x4e, 0x08, 0x20, 0x20, 0x20,
+    0x20, 0x20, 0x20, 0x20, 0x20, 0x4d, 0x4e, 0x07, 0x20, 0x20, 0x20, 0x20,
+    0x20, 0x20, 0x20, 0x49, 0x44, 0x02, 0x20, 0x20, 0x53, 0x55, 0x06, 0x20,
+    0x20, 0x20, 0x20, 0x20, 0x20, 0x4e, 0x4e, 0x10, 0x20, 0x20, 0x20, 0x20,
+    0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
+    0x52, 0x47, 0x04, 0x20, 0x20, 0x20, 0x20, 0x52, 0x42, 0x04, 0x20, 0x20,
+    0x20, 0x20, 0x57, 0x4e, 0x0c, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
+    0x20, 0x20, 0x20, 0x20, 0x20, 0x46, 0x56, 0x20, 0x20, 0x20, 0x20, 0x20,
+    0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
+    0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
+    0x20, 0x20, 0x20, 0x20, 0x41, 0x41, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x41, 0x42, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x41, 0x4b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x41, 0x54, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x42, 0x4e, 0x40, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
+    0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
+    0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
+    0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
+    0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
+    0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x42, 0x41, 0x01, 0x20, 0x4d,
+    0x4d, 0x01, 0x20, 0x50, 0x46, 0x04, 0x00, 0x00, 0x00, 0x00, 0x78, 0x84,
+    0xe4, 0x00, 0x52, 0x54, 0x04, 0x55, 0x54, 0x49, 0x4c, 0x44, 0x30, 0x01,
+    0x00, 0x44, 0x31, 0x01, 0x00, 0x44, 0x32, 0x01, 0x00, 0x44, 0x33, 0x01,
+    0x00, 0x44, 0x34, 0x04, 0x00, 0x00, 0x00, 0x00, 0x44, 0x35, 0x04, 0x00,
+    0x00, 0x00, 0x00, 0x44, 0x36, 0x04, 0x00, 0x00, 0x00, 0x00, 0x44, 0x37,
+    0x04, 0x00, 0x00, 0x00, 0x00, 0x44, 0x38, 0x08, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x44, 0x39, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x46, 0x30, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x46, 0x31, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x46, 0x32, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x46, 0x33, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x46,
+    0x34, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x46, 0x35,
+    0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x46, 0x36, 0x10, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x46, 0x37, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x46, 0x38, 0x10, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x46, 0x39, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x50, 0x46, 0x02,
+    0x00, 0x00, 0x78, 0x84, 0x2c, 0x00, 0x52, 0x54, 0x04, 0x44, 0x49, 0x4e,
+    0x46, 0x52, 0x49, 0x04, 0x00, 0x00, 0x00, 0x00, 0x46, 0x4c, 0x14, 0x20,
+    0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
+    0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x50, 0x46, 0x04, 0x00, 0x00,
+    0x00, 0x00, 0x78, 0x84, 0x44, 0x00, 0x52, 0x54, 0x04, 0x56, 0x43, 0x45,
+    0x4e, 0x44, 0x52, 0x06, 0x43, 0x45, 0x43, 0x20, 0x20, 0x20, 0x53, 0x45,
+    0x07, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x54, 0x4d, 0x08, 0x20,
+    0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x46, 0x43, 0x08, 0x20, 0x20,
+    0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x52, 0x47, 0x04, 0x20, 0x20, 0x20,
+    0x20, 0x52, 0x42, 0x04, 0x20, 0x20, 0x20, 0x20, 0x50, 0x46, 0x03, 0x00,
+    /* ECC area */
+    0x00, 0x00, 0x78, 0x4d, 0x5d, 0x84, 0x8c, 0x0a, 0xf9, 0xed, 0x3d, 0x96,
+    0x11, 0x4a, 0x45, 0x9a, 0xb6, 0xb2, 0xd9, 0x19, 0x43, 0x05, 0x0f, 0xdd,
+    0xb5, 0xf9, 0x3d, 0x5b, 0x81, 0xb3, 0x79, 0xcb, 0x19, 0x48, 0xbb, 0xa2,
+    0x57, 0x10, 0x6e, 0x39, 0x38, 0x85, 0x5e, 0xa3, 0x24, 0xbc, 0x02, 0x63,
+    0x6b, 0x79, 0xa3, 0x6b, 0xed, 0xcd, 0x27, 0x4e, 0x79, 0x9f, 0x76, 0x4e,
+    0x7b, 0x93, 0x2d, 0xf4, 0x4c, 0x51, 0x0e, 0x28, 0x46, 0x43, 0x2b, 0xd9,
+    0x1b, 0x21, 0x21, 0xc8, 0xe4, 0x6e, 0x9b, 0x4e, 0x34, 0x7e, 0x6e, 0x82,
+    0x1b, 0x09, 0x13, 0xf1, 0x40, 0x7b, 0x9f, 0x6d, 0x50, 0x3e, 0x65, 0x31,
+    0x1f, 0x19, 0x6f, 0x61, 0x78, 0x27, 0x72, 0x7c, 0x59, 0x34, 0x7c, 0x05,
+    0x58, 0x13, 0x6f, 0x78, 0x13, 0x56, 0x33, 0x19, 0x1e, 0x79, 0x17, 0x41,
+    0x28, 0x58, 0x6d, 0x26, 0x01, 0x34, 0x7d, 0x68, 0x1d, 0x7e, 0x1c, 0x42,
+    0x49, 0x2a, 0x11, 0x7c, 0x70, 0x1a, 0x66, 0x47, 0x68, 0x6e, 0x3f, 0x5e,
+    0x6b, 0x6d, 0x25, 0x7e, 0x3e, 0x24, 0x39, 0x07, 0x3c, 0x6e, 0x5b, 0x5d,
+    0x4e, 0x59, 0x79, 0x7d, 0x6f, 0x5f, 0x7f, 0x5f, 0x4b, 0x5f, 0x6d, 0x3e,
+    0x58, 0x57, 0x1b, 0x19, 0x5d, 0x14, 0x43, 0x83, 0xfc, 0xe6, 0x49, 0x84,
+    0x41, 0x28, 0x0b, 0x0a, 0x00, 0x5b, 0xec, 0x46, 0x13, 0x4d, 0x00, 0xdc,
+    0x89, 0xab, 0xbb, 0x77, 0x77, 0x7e, 0xee, 0xff, 0xfd, 0xdf, 0xff, 0xbb,
+    0xbf, 0xff, 0x77, 0x7f, 0xfe, 0xee, 0xff, 0xfd, 0xdf, 0xff, 0xbb, 0xbf,
+    0xfe, 0x76, 0x7e, 0xca, 0xc8, 0x99, 0x51, 0xd7, 0x70, 0x00, 0x03, 0x26,
+    0x9e, 0x4e, 0x7f, 0x13, 0x38, 0xbb, 0x3c, 0xbb, 0x00, 0x02, 0xa0, 0x0a,
+    0xcb, 0x70, 0xb7, 0x9f, 0x2b, 0x79, 0xa4, 0x00, 0x07, 0x71, 0xad, 0x17,
+    0x41, 0xd7, 0xb9, 0x8c, 0x6d, 0x08, 0x2c, 0x80, 0x04, 0x56, 0x6b, 0x9f,
+    0x00, 0x9f, 0xbe, 0xdb, 0x71, 0x63, 0x01, 0xb8, 0xf0, 0x41, 0xc0, 0xe1,
+    0x8d, 0x3a, 0x6f, 0xc0, 0x66, 0x5f, 0xb6, 0x4c, 0x2a, 0x5f, 0x06, 0x00,
+    /* Rest is 0x00 */
+};
+static const size_t huygens_bmc_fruid_len = sizeof(huygens_bmc_fruid);
+
+/* chassis1 VPD: huygens_bmc_fruid with VCEN.FC patched to "2E4C-001" */
+#define HUYGENS_CHASSIS1_FC_OFFSET 0x048a
+static const uint8_t huygens_chassis1_fc[] = {
+    0x32, 0x45, 0x34, 0x43, 0x2d, 0x30, 0x30, 0x31
+};
+
+static void huygens_bmc_i2c_init(AspeedMachineState *bmc)
+{
+    AspeedSoCState *soc = bmc->soc;
+
+    /* I2C0: BMC EEPROM */
+    at24c_eeprom_init(aspeed_i2c_get_bus(&soc->i2c, 0), 0x50, 8 * KiB);
+
+    /* I2C2: TPM */


QEMU has a TPM support.

+    /* I2C5: UCD90320 power sequencer */
+    i2c_slave_create_simple(aspeed_i2c_get_bus(&soc->i2c, 5), "ucd90320", 
0x11);
+
+    /* I2C6: chassis1 backplane VPD EEPROM */
+    {
+        uint8_t *ch1 = g_malloc(huygens_bmc_fruid_len);


use g_autofree variables.

+        memcpy(ch1, huygens_bmc_fruid, huygens_bmc_fruid_len);
+        memcpy(ch1 + HUYGENS_CHASSIS1_FC_OFFSET,
+               huygens_chassis1_fc, sizeof(huygens_chassis1_fc));
+        at24c_eeprom_init_rom(aspeed_i2c_get_bus(&soc->i2c, 6), 0x50,
+                              8 * KiB, ch1, huygens_bmc_fruid_len);
+        g_free(ch1);
+    }
+
+    /* I2C8: System VPD at 0x53 */
+    at24c_eeprom_init_rom(aspeed_i2c_get_bus(&soc->i2c, 8), 0x53,
+                          4 * KiB, huygens_bmc_fruid, huygens_bmc_fruid_len);
+    /* LCD EEPROM */
+    at24c_eeprom_init(aspeed_i2c_get_bus(&soc->i2c, 8), 0x51, 8 * KiB);
+
+    /* I2C9: System VPD redundant and op-panel devices */
+    at24c_eeprom_init(aspeed_i2c_get_bus(&soc->i2c, 9),
+                      0x53, 8 * KiB);  /* SYSVPD-redundant */
+
+    /* TMP275 temperature sensor (compatible with TMP105) */
+    i2c_slave_create_simple(aspeed_i2c_get_bus(&soc->i2c, 9),
+                            TYPE_TMP105, 0x48);
+
+    /* Op-panel EEPROM */
+    at24c_eeprom_init(aspeed_i2c_get_bus(&soc->i2c, 9), 0x51, 8 * KiB);
+
+    /* PCA9552 LED controllers on bus 9 */
+    aspeed_create_pca9552(soc, 9, 0x62);
+    aspeed_create_pca9552(soc, 9, 0x64);
+    aspeed_create_pca9552(soc, 9, 0x66);
+
+    /* DPS310 pressure sensor */
+    i2c_slave_create_simple(aspeed_i2c_get_bus(&soc->i2c, 9), "dps310", 0x76);
+}
+
+static void aspeed_machine_huygens_class_init(ObjectClass *oc,
+                                              const void *data)
+{
+    MachineClass *mc = MACHINE_CLASS(oc);
+    AspeedMachineClass *amc = ASPEED_MACHINE_CLASS(oc);
+
+    mc->alias      = "ast2700-huygens";
+    mc->desc       = "Aspeed AST2700 A2 [IBM Huygens]";
+    amc->soc_name  = "ast2700-a2";
+    amc->hw_strap1 = HUYGENS_BMC_HW_STRAP1;
+    amc->hw_strap2 = HUYGENS_BMC_HW_STRAP2;
+    amc->fmc_model = "w25q01jvq";
+    amc->spi_model = "w25q512jv";
+    amc->num_cs    = 2;
+    amc->macs_mask = ASPEED_MAC0_ON | ASPEED_MAC1_ON | ASPEED_MAC2_ON;
+    amc->uart_default = ASPEED_DEV_UART12;
+    amc->i2c_init  = huygens_bmc_i2c_init;
+    amc->vbootrom  = true;
+    mc->default_ram_size = 2 * GiB;
+    aspeed_machine_class_init_cpus_defaults(mc);
+}
+
+static const TypeInfo aspeed_ast27x0_huygens_types[] = {
+    {
+        .name       = MACHINE_TYPE_NAME("huygens-bmc"),
+        .parent     = TYPE_ASPEED_MACHINE,
+        .class_init = aspeed_machine_huygens_class_init,
+        .interfaces = aarch64_machine_interfaces,
+    }
+};
+
+DEFINE_TYPES(aspeed_ast27x0_huygens_types)
diff --git a/hw/arm/meson.build b/hw/arm/meson.build
index 4233a800be..a237f1d04f 100644
--- a/hw/arm/meson.build
+++ b/hw/arm/meson.build
@@ -75,6 +75,7 @@ arm_common_ss.add(when: 'CONFIG_ASPEED_SOC', if_true: files(
    'aspeed_ast27x0-fc.c',
    'aspeed_ast27x0-ssp.c',
    'aspeed_ast27x0-tsp.c',
+  'aspeed_ast27x0_huygens.c',
    'aspeed_coprocessor_common.c'))
  arm_common_ss.add(when: 'CONFIG_MPS2', if_true: files('mps2.c'))
  arm_common_ss.add(when: 'CONFIG_MPS2', if_true: files('mps2-tz.c'))


Thanks,

C.

Re: [PATCH v1 1/5] arm/aspeed: Add AST2700 Huygens machine

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