• Linus Torvalds's avatar
    Merge branch 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 5aa90a84
    Linus Torvalds authored
    Pull x86 page table isolation updates from Thomas Gleixner:
     "This is the final set of enabling page table isolation on x86:
       - Infrastructure patches for handling the extra page tables.
       - Patches which map the various bits and pieces which are required to
         get in and out of user space into the user space visible page
       - The required changes to have CR3 switching in the entry/exit code.
       - Optimizations for the CR3 switching along with documentation how
         the ASID/PCID mechanism works.
       - Updates to dump pagetables to cover the user space page tables for
         W+X scans and extra debugfs files to analyze both the kernel and
         the user space visible page tables
      The whole functionality is compile time controlled via a config switch
      and can be turned on/off on the command line as well"
    * 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (32 commits)
      x86/ldt: Make the LDT mapping RO
      x86/mm/dump_pagetables: Allow dumping current pagetables
      x86/mm/dump_pagetables: Check user space page table for WX pages
      x86/mm/dump_pagetables: Add page table directory to the debugfs VFS hierarchy
      x86/mm/pti: Add Kconfig
      x86/dumpstack: Indicate in Oops whether PTI is configured and enabled
      x86/mm: Clarify the whole ASID/kernel PCID/user PCID naming
      x86/mm: Use INVPCID for __native_flush_tlb_single()
      x86/mm: Optimize RESTORE_CR3
      x86/mm: Use/Fix PCID to optimize user/kernel switches
      x86/mm: Abstract switching CR3
      x86/mm: Allow flushing for future ASID switches
      x86/pti: Map the vsyscall page if needed
      x86/pti: Put the LDT in its own PGD if PTI is on
      x86/mm/64: Make a full PGD-entry size hole in the memory map
      x86/events/intel/ds: Map debug buffers in cpu_entry_area
      x86/cpu_entry_area: Add debugstore entries to cpu_entry_area
      x86/mm/pti: Map ESPFIX into user space
      x86/mm/pti: Share entry text PMD
      x86/entry: Align entry text section to PMD boundary
main.c 26.8 KB