[PATCH v4 0/3] AMD/Xilinx Versal TRNG support

[Tong Ho]

This series adds support for the True Random Number Generator
(TRNG) in the AMD/Xilinx Versal family of devices.

The series starts by introducing a non-cryptographic grade model
of the TRNG controller in the Versal family of devices, followed
by instantiating the model in Xilinx Versal machine.

The series ends with a q-test for sanity check of the TRNG model
in the Xilinx Versal machine.

V3 => V4
1) Patch #1
   a) Simplify the data given to g_rand_set_seed_array() as an
      array of guint32.
   b) Use qemu_guest_getrandom_nofail() as the entropy source
      when the device is configured in TRNG (mode 3).
   c) Allow 0 and (2^32-1) as valid output of the generator
   d) Add output-related context to VMSTATE.
2) Patch #3
   Remove test's assumption of PRNG output != TRNG output.

V2 => V3
1) Patch #1 Use DEFINE_PROP to define a property with custom action on set
2) Patch #1 Remove duplicated version-check on writing to CTRL4 register
3) Patch #2 Defer adding TRNG to machine's device-tree to a future patch
4) Patch #3 Code style fix: group all local vars definitions together

V1 => V2
1) Change patch #1 only
2) Use g_rand_*() PRNG from glib to replace V1's custom PRNG.
3) Implement ResettableClass for device-reset.
4) Add device-mode description to commit-message.

Best regards,
Tong Ho

Tong Ho (3):
  hw/misc: Introduce AMD/Xilix Versal TRNG device
  hw/arm: xlnx-versal-virt: Add AMD/Xilinx TRNG device
  tests/qtest: Introduce tests for AMD/Xilinx Versal TRNG device

 hw/arm/Kconfig                      |   1 +
 hw/arm/xlnx-versal.c                |  16 +
 hw/misc/Kconfig                     |   3 +
 hw/misc/meson.build                 |   3 +
 hw/misc/xlnx-versal-trng.c          | 727 ++++++++++++++++++++++++++++
 include/hw/arm/xlnx-versal.h        |   5 +
 include/hw/misc/xlnx-versal-trng.h  |  58 +++
 tests/qtest/meson.build             |   2 +-
 tests/qtest/xlnx-versal-trng-test.c | 486 +++++++++++++++++++
 9 files changed, 1300 insertions(+), 1 deletion(-)
 create mode 100644 hw/misc/xlnx-versal-trng.c
 create mode 100644 include/hw/misc/xlnx-versal-trng.h
 create mode 100644 tests/qtest/xlnx-versal-trng-test.c

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2.25.1