Re: [RFC PATCH 0/3] Add a new flag for ITS device to control indirect route

Marc Zyngier
2016-12-01T09:07:22Z

On 01/12/16 07:45, Majun wrote:
> From: MaJun <majun258@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?

Anyway, doing this as a DT quirk doesn't feel right. Please use the ITS
quirk infrastructure.

Thanks,

M.
--
Jazz is not dead. It just smells funny...