[PATCH v4 0/5] ASPEED OTP QEMU model: block backend, machine alias, SoC integration

[Kane Chen via <qemu-arm@nongnu.org>]

From: Kane-Chen-AS <kane_chen@aspeedtech.com>

This patch series extends the QEMU model for the ASPEED OTP (One-Time
Programmable) memory device with block backend support and tighter
integration with the SoC and machine configuration.

The OTP model simulates a simple fuse array, used in ASPEED SoCs
for secure boot and configuration purposes. The updated model now
supports loading initial OTP content from a file via the QEMU CLI.

Example usage:
  ./qemu-system-arm \
    -machine ast2600-evb,otpmem=otp \
    -blockdev driver=file,filename=otpmem.img,node-name=otp \
    -global aspeed-otp.drive=otp \
    ...

ChangeLog
---------
v4:
- Add a 'drive' property to allow backing OTP data with a block device
- Expose a machine parameter (`-machine otpmem=XXX`) for convenient
  aliasing of the OTP drive via QOM path

v3:
- Switched to object_property_set_int() for setting "size"
- Simplified qdev_realize() error handling by passing errp directly
- Added "drive" property to OTP model for future extensibility

v2:
- Rename device from 'aspeed_otpmem' to 'aspeed_otp' and move it to hw/nvram/
- Move OTP device realization from instance_init to the realize function
- Improve error logging with qemu_log_mask() and remove unused error propagation

v1:
- Initial version

---

Kane-Chen-AS (5):
  hw/misc/aspeed_otp: Add ASPEED OTP memory device model
  hw/misc/aspeed_sbc: Connect ASPEED OTP memory device to SBC
  hw/arm: Integrate ASPEED OTP memory support into AST2600 SoCs
  hw/misc/aspeed_otp: Add 'drive' property to support block backend
  hw/misc/aspeed_sbc: Add machine parameter to alias OTP drive property

 include/hw/misc/aspeed_sbc.h  |   5 ++
 include/hw/nvram/aspeed_otp.h |  33 ++++++++++
 hw/arm/aspeed.c               |  20 ++++++
 hw/arm/aspeed_ast2600.c       |   2 +-
 hw/misc/aspeed_sbc.c          | 121 ++++++++++++++++++++++++++++++++++
 hw/nvram/aspeed_otp.c         | 113 +++++++++++++++++++++++++++++++
 hw/misc/trace-events          |   5 ++
 hw/nvram/meson.build          |   4 ++
 8 files changed, 302 insertions(+), 1 deletion(-)
 create mode 100644 include/hw/nvram/aspeed_otp.h
 create mode 100644 hw/nvram/aspeed_otp.c

-- 
2.43.0