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65fddcfca8
The replacement of <asm/pgrable.h> with <linux/pgtable.h> made the include
of the latter in the middle of asm includes. Fix this up with the aid of
the below script and manual adjustments here and there.
import sys
import re
if len(sys.argv) is not 3:
print "USAGE: %s <file> <header>" % (sys.argv[0])
sys.exit(1)
hdr_to_move="#include <linux/%s>" % sys.argv[2]
moved = False
in_hdrs = False
with open(sys.argv[1], "r") as f:
lines = f.readlines()
for _line in lines:
line = _line.rstrip('
')
if line == hdr_to_move:
continue
if line.startswith("#include <linux/"):
in_hdrs = True
elif not moved and in_hdrs:
moved = True
print hdr_to_move
print line
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Cain <bcain@codeaurora.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Chris Zankel <chris@zankel.net>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Greentime Hu <green.hu@gmail.com>
Cc: Greg Ungerer <gerg@linux-m68k.org>
Cc: Guan Xuetao <gxt@pku.edu.cn>
Cc: Guo Ren <guoren@kernel.org>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Helge Deller <deller@gmx.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Ley Foon Tan <ley.foon.tan@intel.com>
Cc: Mark Salter <msalter@redhat.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Nick Hu <nickhu@andestech.com>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Rich Felker <dalias@libc.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Stafford Horne <shorne@gmail.com>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Vincent Chen <deanbo422@gmail.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Will Deacon <will@kernel.org>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Link: http://lkml.kernel.org/r/20200514170327.31389-4-rppt@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
63 lines
1.4 KiB
C
63 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/spinlock.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/pgtable.h>
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#include <asm/proto.h>
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#include <asm/cpufeature.h>
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static int disable_nx;
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/*
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* noexec = on|off
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*
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* Control non-executable mappings for processes.
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*
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* on Enable
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* off Disable
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*/
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static int __init noexec_setup(char *str)
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{
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if (!str)
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return -EINVAL;
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if (!strncmp(str, "on", 2)) {
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disable_nx = 0;
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} else if (!strncmp(str, "off", 3)) {
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disable_nx = 1;
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}
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x86_configure_nx();
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return 0;
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}
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early_param("noexec", noexec_setup);
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void x86_configure_nx(void)
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{
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if (boot_cpu_has(X86_FEATURE_NX) && !disable_nx)
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__supported_pte_mask |= _PAGE_NX;
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else
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__supported_pte_mask &= ~_PAGE_NX;
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}
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void __init x86_report_nx(void)
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{
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if (!boot_cpu_has(X86_FEATURE_NX)) {
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printk(KERN_NOTICE "Notice: NX (Execute Disable) protection "
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"missing in CPU!\n");
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} else {
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#if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
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if (disable_nx) {
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printk(KERN_INFO "NX (Execute Disable) protection: "
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"disabled by kernel command line option\n");
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} else {
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printk(KERN_INFO "NX (Execute Disable) protection: "
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"active\n");
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}
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#else
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/* 32bit non-PAE kernel, NX cannot be used */
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printk(KERN_NOTICE "Notice: NX (Execute Disable) protection "
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"cannot be enabled: non-PAE kernel!\n");
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#endif
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}
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}
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