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. CI tests: https://gitlab.com/xen-project/people/olkur/xen/-/pipelines/1829069921 --- Changes in V4: - Merged to staging: - xen/riscv: initialize bitmap to zero in riscv_fill_hwcap_from_isa_string() - xen/asm-generic: introduce asm-generic/irq-dt.h - xen/riscv: introduce smp_prepare_boot_cpu() - xen/riscv: introduce support of Svpbmt extension - add ioremap_*() variants using ioremap_attr() - xen/riscv: introduce init_IRQ() - xen/riscv: introduce platform_get_irq() - All other changes are patch-specific. Please check each patch separately. --- Changes in V2: - Merged to staging: xen/riscv: initialize bitmap to zero in riscv_fill_hwcap_from_isa_string() xen/asm-generic: introduce asm-generic/irq-dt.h - All other changes are patch-specific. Please check each patch separately. --- Oleksii Kurochko (9): xen/riscv: dt_processor_hartid() implementation xen/riscv: introduce register_intc_ops() and intc_hw_ops. xen/riscv: imsic_init() implementation xen/riscv: aplic_init() implementation xen/riscv: introduce intc_init() and helpers xen/riscv: implementation of aplic and imsic operations xen/riscv: add external interrupt handling for hypervisor mode xen/riscv: implement setup_irq() xen/riscv: add basic UART support xen/arch/riscv/Kconfig | 1 + xen/arch/riscv/Makefile | 1 + xen/arch/riscv/aplic-priv.h | 38 +++ xen/arch/riscv/aplic.c | 296 ++++++++++++++++++ xen/arch/riscv/imsic.c | 478 +++++++++++++++++++++++++++++ xen/arch/riscv/include/asm/aplic.h | 73 +++++ xen/arch/riscv/include/asm/imsic.h | 74 +++++ xen/arch/riscv/include/asm/intc.h | 32 ++ xen/arch/riscv/include/asm/irq.h | 8 +- xen/arch/riscv/include/asm/smp.h | 17 + xen/arch/riscv/intc.c | 55 ++++ xen/arch/riscv/irq.c | 131 ++++++++ xen/arch/riscv/setup.c | 14 + xen/arch/riscv/smpboot.c | 77 +++++ xen/arch/riscv/traps.c | 19 ++ xen/drivers/char/Kconfig | 3 +- 16 files changed, 1314 insertions(+), 3 deletions(-) create mode 100644 xen/arch/riscv/aplic-priv.h 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 -- 2.49.0
