Dave Hansen <dave.han...@linux.intel.com> wrote: > > From: Dave Hansen <dave.han...@linux.intel.com> > > In creating its page tables, the espfix code masks its PGTABLE_PROT > value with the supported mask: __supported_pte_mask. This ensures > that unsupported bits are not set in the final PTE. But, it also > sets _PAGE_GLOBAL which we do not want for PTE. Use > __default_kernel_pte_mask instead which clears _PAGE_GLOBAL for PTI.
Can you please explain what is your concern? Exposing more gadgets for speculative ROP attacks? Or is it a general rule of not exposing any kernel code &data more than absolutely necessary?