[v1,00/14] riscv: introduce basic UART support and interrupts for hypervisor mode

Message

Oleksii Kurochko April 8, 2025, 3:57 p.m. UTC

The patch series introduces basic UART support (in interrupt mode) and support of
interrupts for hypervisor mode.

To implement this the following has been added:
- APLIC and IMISC initialization.
- Introduce of intc_hw_operations abstraction.
- Introduce some APLIC and IMSIC operations.
- Introduce init_IRQ(), platform_get_irq() and setup_irq() functions.
- Update do_trap() handler to handle IRQ_S_EXT.
- Introduce some other functions such as: get_s_time(), smp_clear_cpu_maps(),
  ioremap().
- Enable UART. 

Oleksii Kurochko (14):
  xen/riscv: implement get_s_time()
  xen/riscv: introduce smp_clear_cpu_maps()
  xen/riscv: introduce ioremap()
  xen/riscv: introduce init_IRQ()
  xen/riscv: introduce platform_get_irq()
  xen/riscv: riscv_of_processor_hartid() implementation
  xen/riscv: Introduce intc_hw_operations abstraction
  xen/riscv: imsic_init() implementation
  xen/riscv: aplic_init() implementation
  xen/riscv: implementation of aplic and imsic operations
  xen/riscv: add external interrupt handling for hypervisor mode
  xen/riscv: implement setup_irq()
  xen/riscv: initialize interrupt controller
  xen/riscv: add basic UART support

 xen/arch/riscv/Kconfig             |  13 +
 xen/arch/riscv/Makefile            |   3 +
 xen/arch/riscv/aplic.c             | 302 +++++++++++++++++++++++
 xen/arch/riscv/imsic.c             | 374 +++++++++++++++++++++++++++++
 xen/arch/riscv/include/asm/aplic.h |  89 +++++++
 xen/arch/riscv/include/asm/imsic.h |  88 +++++++
 xen/arch/riscv/include/asm/intc.h  |  31 +++
 xen/arch/riscv/include/asm/irq.h   |  37 ++-
 xen/arch/riscv/include/asm/smp.h   |   5 +
 xen/arch/riscv/include/asm/time.h  |   6 +
 xen/arch/riscv/intc.c              |  58 +++++
 xen/arch/riscv/irq.c               | 223 +++++++++++++++++
 xen/arch/riscv/pt.c                |  19 ++
 xen/arch/riscv/setup.c             |  23 ++
 xen/arch/riscv/smpboot.c           |  83 +++++++
 xen/arch/riscv/stubs.c             |  16 --
 xen/arch/riscv/time.c              |   7 +
 xen/arch/riscv/traps.c             |  18 ++
 xen/drivers/char/Kconfig           |   1 -
 19 files changed, 1378 insertions(+), 18 deletions(-)
 create mode 100644 xen/arch/riscv/imsic.c
 create mode 100644 xen/arch/riscv/include/asm/aplic.h
 create mode 100644 xen/arch/riscv/include/asm/imsic.h
 create mode 100644 xen/arch/riscv/irq.c
 create mode 100644 xen/arch/riscv/smpboot.c