On Tue, 2021-08-31 at 11:56 +0300, Mike Rapoport wrote: > 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? > Yes, this should move, thanks. Ira did some Kconfig re-arranging in pks core v7 that should make this easy now. > > + depends on ARCH_HAS_SUPERVISOR_PKEYS > > + > > config PERCPU_STATS > > bool "Collect percpu memory statistics" > > help > > -- > > 2.17.1 > > > >
