diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2018-04-15 13:35:29 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-04-15 13:35:29 -0700 |
| commit | 6b0a02e86c293c32a50d49b33a1f04420585d40b (patch) | |
| tree | 048e4f6f19548cd0052395867327b4dcf2d19546 /arch/x86/mm/init_64.c | |
| parent | 71b8ebbf3d7bee88427eb207ef643f2f6447c625 (diff) | |
| parent | e3e288121408c3abeed5af60b87b95c847143845 (diff) | |
Merge branch 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 pti updates from Thomas Gleixner:
"Another series of PTI related changes:
- Remove the manual stack switch for user entries from the idtentry
code. This debloats entry by 5k+ bytes of text.
- Use the proper types for the asm/bootparam.h defines to prevent
user space compile errors.
- Use PAGE_GLOBAL for !PCID systems to gain back performance
- Prevent setting of huge PUD/PMD entries when the entries are not
leaf entries otherwise the entries to which the PUD/PMD points to
and are populated get lost"
* 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/pgtable: Don't set huge PUD/PMD on non-leaf entries
x86/pti: Leave kernel text global for !PCID
x86/pti: Never implicitly clear _PAGE_GLOBAL for kernel image
x86/pti: Enable global pages for shared areas
x86/mm: Do not forbid _PAGE_RW before init for __ro_after_init
x86/mm: Comment _PAGE_GLOBAL mystery
x86/mm: Remove extra filtering in pageattr code
x86/mm: Do not auto-massage page protections
x86/espfix: Document use of _PAGE_GLOBAL
x86/mm: Introduce "default" kernel PTE mask
x86/mm: Undo double _PAGE_PSE clearing
x86/mm: Factor out pageattr _PAGE_GLOBAL setting
x86/entry/64: Drop idtentry's manual stack switch for user entries
x86/uapi: Fix asm/bootparam.h userspace compilation errors
Diffstat (limited to 'arch/x86/mm/init_64.c')
| -rw-r--r-- | arch/x86/mm/init_64.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c index 66de40e45f58..0a400606dea0 100644 --- a/arch/x86/mm/init_64.c +++ b/arch/x86/mm/init_64.c @@ -65,8 +65,13 @@ * around without checking the pgd every time. */ +/* Bits supported by the hardware: */ pteval_t __supported_pte_mask __read_mostly = ~0; +/* Bits allowed in normal kernel mappings: */ +pteval_t __default_kernel_pte_mask __read_mostly = ~0; EXPORT_SYMBOL_GPL(__supported_pte_mask); +/* Used in PAGE_KERNEL_* macros which are reasonably used out-of-tree: */ +EXPORT_SYMBOL(__default_kernel_pte_mask); int force_personality32; @@ -1286,6 +1291,12 @@ void mark_rodata_ro(void) (unsigned long) __va(__pa_symbol(_sdata))); debug_checkwx(); + + /* + * Do this after all of the manipulation of the + * kernel text page tables are complete. + */ + pti_clone_kernel_text(); } int kern_addr_valid(unsigned long addr) |