Add a DesignWare APB timer model to QEMU, wire it to the K230 board,
and provide qtest coverage for the timer behavior.

Changes in v5:
- Rename DW_APB_TIMER_CONTROL_INT to
  DW_APB_TIMER_CONTROL_INT_MASK.
- Fix the K230 timer clock frequency from 6.25 MHz to 50 MHz.
- Wrap the qtest commit message at about 70 characters per line.
- Register both K230 qtests directly under CONFIG_K230.

Testing:
- QEMU build passed in the Debian container.
- tests/qtest/k230-dwapb-timer-test: 8/8 passed.
- Mainline Linux 7.2.0-rc3 booted successfully.
- DW APB timer registered at 50 MHz; PLIC timer interrupt counts increased.

raoyi (3):
  hw/timer: add DesignWare APB timer model
  hw/riscv: add DesignWare APB timer to K230 board
  tests/qtest: add k230 dwapb timer test

 MAINTAINERS                         |   3 +
 hw/riscv/Kconfig                    |   1 +
 hw/riscv/k230.c                     |  33 ++-
 hw/timer/Kconfig                    |   4 +
 hw/timer/dw-apb-timer.c             | 376 ++++++++++++++++++++++++++++
 hw/timer/meson.build                |   1 +
 hw/timer/trace-events               |   8 +
 include/hw/riscv/k230.h             |   8 +
 include/hw/timer/dw-apb-timer.h     |  40 +++
 tests/qtest/k230-dwapb-timer-test.c | 274 ++++++++++++++++++++
 tests/qtest/meson.build             |   3 +-
 11 files changed, 747 insertions(+), 4 deletions(-)
 create mode 100644 hw/timer/dw-apb-timer.c
 create mode 100644 include/hw/timer/dw-apb-timer.h
 create mode 100644 tests/qtest/k230-dwapb-timer-test.c


base-commit: f893c46c3931b3684d235d221bf8b7844ddbf1d7
-- 
2.53.0