Hi Hari, Thanks for persisting with this.
On Thu, 2016-07-04 at 21:58:50 UTC, Hari Bathini wrote: > With the previous patch, we choke out whatever little space is left > below 0x7000 (FWNMI hard block) while there is a hole of ~1400 bytes > below __end_interrupts marker when CONFIG_CBE_RAS is disabled. > Considering CONFIG_CBE_RAS is not enabled by default for BOOK3S, this > is not a desirable scenario especially when we have to worry about > each additional instruction that goes below 0x7000. > > Memory region from 0x1800 to 0x4000 is dedicated for common interrupt > vector code. Also, we never hit an interrupt below 0x300 when IR=DR=1 > implying memory region between 0x4000 to 0x4300 can also be used for > common interrupt vector code. So, we can effectively use memory region > between 0x1800 to 0x4300 for common interrupt vector code. On Power9 the system-call-vectored instruction will use the region at 0x3000, so moving code into that space is not a good long term plan. I'll take your v2 and put it in next next week. cheers _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev