On Mon, May 25, 2020 at 6:42 PM Lai Jiangshan <la...@linux.alibaba.com> wrote: > > The percpu user_pcid_flush_mask is used for CPU entry > If a data breakpoint on it, it will cause an unwanted #DB. > Protect the full cpu_tlbstate structure to be sure. > > There are some other percpu data used in CPU entry, but they are > either in already-protected cpu_tss_rw or are safe to trigger #DB > (espfix_waddr, espfix_stack).
How hard would it be to rework this to have DECLARE_PERCPU_NODEBUG() and DEFINE_PERCPU_NODEBUG() or similar?
