于 2020年3月25日 GMT+08:00 下午10:15:16, Marc Zyngier <maz@xxxxxxxxxx> 写到: >On 2020-03-25 13:59, Jiaxun Yang wrote: > >[...] > >>>> So probably we can use legacy domain when MIPS IRQ BASE is in the >>>> range of legacy IRQ >>>> and switch to simple domain when it's not in that range? >>> >>> No, see below. >>> >>>> Here in Loongson systems IRQ 0-15 is occupied by I8259 so I did >this >>>> hack. >>> >>> Well, if you have to consider which Linux IRQ gets assigned, >>> then your platform is definitely not ready for non-legacy >>> irqdomains. Just stick to legacy for now until you have removed >>> all the code that knows the hwirq mapping. >> >> Thanks. >> >> So I have to allocate irq_desc here in driver manually? > >No, you are probably better off just dropping this patch, as MIPS >doesn't seem to be ready for a wholesale switch to virtual interrupts. It can't work without this patch. Legacy domain require IRQ number within 0-15 however it's already occupied by i8259 or "HTPIC" driver. Previously Loongson even didn't enable IRQ domain so it's not a problem. > > M. -- Jiaxun Yang
