# Pastebin cIYnUOo0
In this, 1 is the UART (PLIC source 15), 5 is the s-mode timer, 9 is the s-mode external interrupt (the PLIC chip)

# cat 1
handler:  handle_fasteoi_irq
device:   (null)
status:   0x00000400	_IRQ_NOPROBE
istate:   0x00000000
ddepth:   1
wdepth:   0
dstate:   0x02031000            IRQD_IRQ_DISABLED	IRQD_IRQ_MASKED	IRQD_AFFINITY_SET	IRQD_DEFAULT_TRIGGER_SET
node:     0
affinity: 0
domain:  :soc:interrupt-controller@10000000
 hwirq:   0xf
 chip:    SiFive PLIC
  flags:   0x0

 
# cat 5
handler:  handle_percpu_devid_irq
device:   (null)
status:   0x00031600	_IRQ_NOPROBE	_IRQ_NOTHREAD	_IRQ_NOAUTOEN	_IRQ_PER_CPU_DEVID
istate:   0x00000000
ddepth:   1
wdepth:   0
dstate:   0x00030a00	IRQD_ACTIVATED	IRQD_IRQ_DISABLED	IRQD_IRQ_MASKED	IRQD_PER_CPU
node:     0
affinity: 0
domain:  :cpus:cpu@0:interrupt-controller
 hwirq:   0x5
 chip:    RISC-V INTC
  flags:   0x0


# cat 9
handler:  plic_handle_irq
device:   (null)
status:   0x00031e00	_IRQ_NOPROBE	_IRQ_NOREQUEST	_IRQ_NOTHREAD	_IRQ_NOAUTOEN	_IRQ_PER_CPU_DEVID
istate:   0x00000000
ddepth:   0
wdepth:   0
dstate:   0x02400a00	IRQD_ACTIVATED	IRQD_IRQ_STARTED	IRQD_PER_CPU	IRQD_DEFAULT_TRIGGER_SET
node:     0
affinity: 0
domain:  :cpus:cpu@0:interrupt-controller
 hwirq:   0x9
  chip:   RISC-V INTC
 flags:   0x0