On 7/11/19 7:25 AM, Alexandre Chartre wrote: > - Kernel code mapped to the ASI page-table has been reduced to: > . the entire kernel (I still need to test with only the kernel text) > . the cpu entry area (because we need the GDT to be mapped) > . the cpu ASI session (for managing ASI) > . the current stack > > - Optionally, an ASI can request the following kernel mapping to be added: > . the stack canary > . the cpu offsets (this_cpu_off) > . the current task > . RCU data (rcu_data) > . CPU HW events (cpu_hw_events). I don't see the per-cpu areas in here. But, the ASI macros in entry_64.S (and asi_start_abort()) use per-cpu data. Also, this stuff seems to do naughty stuff (calling C code, touching per-cpu data) before the PTI CR3 writes have been done. But, I don't see anything excluding PTI and this code from coexisting.
