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Diffstat (limited to 'arch/x86/mm/setup_nx.c')
-rw-r--r--arch/x86/mm/setup_nx.c62
1 files changed, 0 insertions, 62 deletions
diff --git a/arch/x86/mm/setup_nx.c b/arch/x86/mm/setup_nx.c
deleted file mode 100644
index ed5667f5169f..000000000000
--- a/arch/x86/mm/setup_nx.c
+++ /dev/null
@@ -1,62 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-#include <linux/spinlock.h>
-#include <linux/errno.h>
-#include <linux/init.h>
-#include <linux/pgtable.h>
-
-#include <asm/proto.h>
-#include <asm/cpufeature.h>
-
-static int disable_nx;
-
-/*
- * noexec = on|off
- *
- * Control non-executable mappings for processes.
- *
- * on Enable
- * off Disable
- */
-static int __init noexec_setup(char *str)
-{
- if (!str)
- return -EINVAL;
- if (!strncmp(str, "on", 2)) {
- disable_nx = 0;
- } else if (!strncmp(str, "off", 3)) {
- disable_nx = 1;
- }
- x86_configure_nx();
- return 0;
-}
-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
- __supported_pte_mask &= ~_PAGE_NX;
-}
-
-void __init x86_report_nx(void)
-{
- if (!boot_cpu_has(X86_FEATURE_NX)) {
- printk(KERN_NOTICE "Notice: NX (Execute Disable) protection "
- "missing in CPU!\n");
- } else {
-#if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
- if (disable_nx) {
- printk(KERN_INFO "NX (Execute Disable) protection: "
- "disabled by kernel command line option\n");
- } else {
- printk(KERN_INFO "NX (Execute Disable) protection: "
- "active\n");
- }
-#else
- /* 32bit non-PAE kernel, NX cannot be used */
- printk(KERN_NOTICE "Notice: NX (Execute Disable) protection "
- "cannot be enabled: non-PAE kernel!\n");
-#endif
- }
-}