On 11/02/2017 02:41 AM, Andy Lutomirski wrote: > > - The GDT array. > - The IDT. > - The vsyscall page. We can make this be _PAGE_USER. > - The TSS. > - The per-cpu entry stack. Let's make it one page with guard pages > on either side. This can replace rsp_scratch. > - cpu_current_top_of_stack. This could be in the same page as the TSS. > - The entry text. > - The percpu IST (aka "EXCEPTION") stacks. > > That's it.
The PEBS/BTS buffers need it too, I think: https://git.kernel.org/pub/scm/linux/kernel/git/daveh/x86-kaiser.git/commit/?h=kaiser-414rc6-20171031&id=97a334906d7853a8109b295ef94f3991418d0c07
