Summary of changes: Shadow stack kernel config option; Control protection exception; and Shadow stack memory management. The shadow stack PTE needs to be read-only and dirty. Changes are made to: Use the read-only and hardware dirty combination exclusively for shadow stack; Use a PTE spare bit to indicate other PTE dirty conditions; Shadow stack page fault handling. Yu-cheng Yu (9): x86/cet: Control protection exception handler x86/cet: Add Kconfig option for user-mode shadow stack mm: Introduce VM_SHSTK for shadow stack memory x86/mm: Change _PAGE_DIRTY to _PAGE_DIRTY_HW x86/mm: Introduce _PAGE_DIRTY_SW x86/mm: Introduce ptep_set_wrprotect_flush and related functions x86/mm: Shadow stack page fault error checking x86/cet: Handle shadow stack page fault x86/cet: Handle THP/HugeTLB shadow stack page copying arch/x86/Kconfig | 24 ++++++ arch/x86/entry/entry_32.S | 5 ++ arch/x86/entry/entry_64.S | 2 +- arch/x86/include/asm/pgtable.h | 149 ++++++++++++++++++++++++++++++----- arch/x86/include/asm/pgtable_types.h | 31 +++++--- arch/x86/include/asm/traps.h | 5 ++ arch/x86/kernel/idt.c | 1 + arch/x86/kernel/relocate_kernel_64.S | 2 +- arch/x86/kernel/traps.c | 61 ++++++++++++++ arch/x86/kvm/vmx.c | 2 +- arch/x86/mm/fault.c | 11 +++ include/asm-generic/pgtable.h | 38 +++++++++ include/linux/mm.h | 8 ++ mm/huge_memory.c | 10 ++- mm/hugetlb.c | 2 +- mm/internal.h | 8 ++ mm/memory.c | 32 +++++++- 17 files changed, 353 insertions(+), 38 deletions(-) -- 2.15.1
