On Mon, Aug 30, 2021 at 04:59:24PM -0700, Rick Edgecombe wrote: > Write protect page tables with PKS. Toggle writeability inside the > pgtable.h defined page table modifiction functions. > > Do not protect the direct map page tables as it is more complicated and > will come in a later patch. > > Signed-off-by: Rick Edgecombe <rick.p.edgecombe@xxxxxxxxx> > --- > arch/x86/boot/compressed/ident_map_64.c | 5 ++ > arch/x86/include/asm/pgtable.h | 18 ++++++- > arch/x86/include/asm/pgtable_64.h | 33 ++++++++++-- > arch/x86/include/asm/pkeys_common.h | 1 - > arch/x86/mm/pgtable.c | 71 ++++++++++++++++++++++--- > arch/x86/mm/pkeys.c | 1 + > include/linux/pkeys.h | 1 + > mm/Kconfig | 6 +++ > 8 files changed, 123 insertions(+), 13 deletions(-) ... > diff --git a/mm/Kconfig b/mm/Kconfig > index 4184d0a7531d..0f8e8595a396 100644 > --- a/mm/Kconfig > +++ b/mm/Kconfig > @@ -845,6 +845,12 @@ config ARCH_ENABLE_SUPERVISOR_PKEYS > def_bool y > depends on PKS_TEST || GENERAL_PKS_USER > > +config PKS_PG_TABLES > + bool "PKS write protected page tables" > + select GENERAL_PKS_USER > + depends on !HIGHMEM && !X86_PAE && SPARSEMEM_VMEMMAP Hmm, why is this x86-only feature is in mm/Kconfig? > + depends on ARCH_HAS_SUPERVISOR_PKEYS > + > config PERCPU_STATS > bool "Collect percpu memory statistics" > help > -- > 2.17.1 > -- Sincerely yours, Mike.
