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authorLinus Torvalds <torvalds@linux-foundation.org>2016-03-15 20:45:39 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2016-03-15 20:45:39 +0300
commit13c76ad87216513db2487aac84155aa57dfd46ce (patch)
tree265661a60dd960bc01e74a65367edd3161b1e018 /arch/x86/mm/setup_nx.c
parent9cf8d6360c1589a97a98313729ed9e5db187f80b (diff)
parent8b8addf891de8a00e4d39fc32f93f7c5eb8feceb (diff)
downloadlinux-13c76ad87216513db2487aac84155aa57dfd46ce.tar.xz
Merge branch 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 mm updates from Ingo Molnar: "The main changes in this cycle were: - Enable full ASLR randomization for 32-bit programs (Hector Marco-Gisbert) - Add initial minimal INVPCI support, to flush global mappings (Andy Lutomirski) - Add KASAN enhancements (Andrey Ryabinin) - Fix mmiotrace for huge pages (Karol Herbst) - ... misc cleanups and small enhancements" * 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/mm/32: Enable full randomization on i386 and X86_32 x86/mm/kmmio: Fix mmiotrace for hugepages x86/mm: Avoid premature success when changing page attributes x86/mm/ptdump: Remove paravirt_enabled() x86/mm: Fix INVPCID asm constraint x86/dmi: Switch dmi_remap() from ioremap() [uncached] to ioremap_cache() x86/mm: If INVPCID is available, use it to flush global mappings x86/mm: Add a 'noinvpcid' boot option to turn off INVPCID x86/mm: Add INVPCID helpers x86/kasan: Write protect kasan zero shadow x86/kasan: Clear kasan_zero_page after TLB flush x86/mm/numa: Check for failures in numa_clear_kernel_node_hotplug() x86/mm/numa: Clean up numa_clear_kernel_node_hotplug() x86/mm: Make kmap_prot into a #define x86/mm/32: Set NX in __supported_pte_mask before enabling paging x86/mm: Streamline and restore probe_memory_block_size()
Diffstat (limited to 'arch/x86/mm/setup_nx.c')
-rw-r--r--arch/x86/mm/setup_nx.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/arch/x86/mm/setup_nx.c b/arch/x86/mm/setup_nx.c
index f65a33f505b6..8bea84724a7d 100644
--- a/arch/x86/mm/setup_nx.c
+++ b/arch/x86/mm/setup_nx.c
@@ -32,9 +32,8 @@ early_param("noexec", noexec_setup);
void x86_configure_nx(void)
{
- if (boot_cpu_has(X86_FEATURE_NX) && !disable_nx)
- __supported_pte_mask |= _PAGE_NX;
- else
+ /* If disable_nx is set, clear NX on all new mappings going forward. */
+ if (disable_nx)
__supported_pte_mask &= ~_PAGE_NX;
}