system/arm/sbsa.rst

1 Arm Server Base System Architecture Reference board (``sbsa-ref``)
4 The ``sbsa-ref`` board intends to look like real hardware (while the ``virt``
9   - `Base System Architecture <https://developer.arm.com/documentation/den0094/>`__ (BSA)
10   - `Server Base System Architecture <https://developer.arm.com/documentation/den0029/>`__ (SBSA)
13 specification defines how the firmware reports that to any operating system.
21 The ``sbsa-ref`` board supports:
23   - A configurable number of AArch64 CPUs
24   - GIC version 3
25   - System bus AHCI controller
26   - System bus XHCI controller
27   - CDROM and hard disc on AHCI bus
28   - E1000E ethernet card on PCIe bus
29   - Bochs display adapter on PCIe bus
30   - A generic SBSA watchdog device
36 ``sbsa-ref`` is a static system that reports a very minimal devicetree to the
37 firmware for non-discoverable information about system components. This
38 includes both internal hardware and parts affected by the qemu command line
45 QEMU provides the guest EL3 firmware with minimal information about hardware
49 It is information passed from QEMU to describe the information a hardware
51 by the QEMU command line.
60    - CPUs
61    - memory
62    - platform version
63    - GIC addresses
64    - NUMA node id for CPUs and memory
65    - CPU topology information
71 what kind of ``sbsa-ref`` board it is running on. It is neither
72 a QEMU versioned machine type nor a reflection of the level of the
75 The ``machine-version-major`` value is updated when changes breaking
76 fw compatibility are introduced. The ``machine-version-minor`` value