在 2016/12/1 17:07, Marc Zyngier 写道: > On 01/12/16 07:45, Majun wrote: >> From: MaJun <majun...@huawei.com> >> >> For current ITS driver, two level table (indirect route) is enabled when the >> memory used >> for LPI route table over the limit(64KB * 2) size. But this function impact >> the >> performance of LPI interrupt actually because need more time to look up the >> table. > > Are you implying that your ITS doesn't have a cache to lookup the most > active devices, hence performing a full lookup on each interrupt?
Our ITS chip has the cache with depth 64. But this seems not enough for some scenario,espeically on virtulization platform. > > Anyway, doing this as a DT quirk doesn't feel right. Please use the ITS > quirk infrastructure. If there is no other better solutions, I will do this. Thanks! Majun > > Thanks, > > M. >
