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authorLinus Torvalds <torvalds@linux-foundation.org>2018-08-13 17:54:17 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2018-08-13 17:54:17 -0700
commiteac341194426ba7ead3444923b9eba491ae4feeb (patch)
tree7daa0ba9c1fc21b603dd45e738e5887f80db939b /init
parentd191c82d4d9bd0bb3b945fc458cc65053ef868a0 (diff)
parentd878efce73fe86db34ddb2013260adf571a701a7 (diff)
Merge branch 'x86/pti' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 PTI updates from Thomas Gleixner: "The Speck brigade sadly provides yet another large set of patches destroying the perfomance which we carefully built and preserved - PTI support for 32bit PAE. The missing counter part to the 64bit PTI code implemented by Joerg. - A set of fixes for the Global Bit mechanics for non PCID CPUs which were setting the Global Bit too widely and therefore possibly exposing interesting memory needlessly. - Protection against userspace-userspace SpectreRSB - Support for the upcoming Enhanced IBRS mode, which is preferred over IBRS. Unfortunately we dont know the performance impact of this, but it's expected to be less horrible than the IBRS hammering. - Cleanups and simplifications" * 'x86/pti' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (60 commits) x86/mm/pti: Move user W+X check into pti_finalize() x86/relocs: Add __end_rodata_aligned to S_REL x86/mm/pti: Clone kernel-image on PTE level for 32 bit x86/mm/pti: Don't clear permissions in pti_clone_pmd() x86/mm/pti: Fix 32 bit PCID check x86/mm/init: Remove freed kernel image areas from alias mapping x86/mm/init: Add helper for freeing kernel image pages x86/mm/init: Pass unconverted symbol addresses to free_init_pages() mm: Allow non-direct-map arguments to free_reserved_area() x86/mm/pti: Clear Global bit more aggressively x86/speculation: Support Enhanced IBRS on future CPUs x86/speculation: Protect against userspace-userspace spectreRSB x86/kexec: Allocate 8k PGDs for PTI Revert "perf/core: Make sure the ring-buffer is mapped in all page-tables" x86/mm: Remove in_nmi() warning from vmalloc_fault() x86/entry/32: Check for VM86 mode in slow-path check perf/core: Make sure the ring-buffer is mapped in all page-tables x86/pti: Check the return value of pti_user_pagetable_walk_pmd() x86/pti: Check the return value of pti_user_pagetable_walk_p4d() x86/entry/32: Add debug code to check entry/exit CR3 ...
Diffstat (limited to 'init')
-rw-r--r--init/main.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/init/main.c b/init/main.c
index 5e13c544bbf4..f86b64c35d38 100644
--- a/init/main.c
+++ b/init/main.c
@@ -1065,6 +1065,13 @@ static int __ref kernel_init(void *unused)
jump_label_invalidate_initmem();
free_initmem();
mark_readonly();
+
+ /*
+ * Kernel mappings are now finalized - update the userspace page-table
+ * to finalize PTI.
+ */
+ pti_finalize();
+
system_state = SYSTEM_RUNNING;
numa_default_policy();

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