diff options
| author | Zong Li <zong.li@sifive.com> | 2020-06-03 16:03:58 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-06-03 20:09:50 -0700 |
| commit | 7e01ccb43d62558dc65c53477a78da133ad8c377 (patch) | |
| tree | df2952f7a98e0e1bdf8263ca75622ee75d011ba9 /arch/x86/Kconfig.debug | |
| parent | b422d28b21773bbfc9e84dbb5579a8ce355279ca (diff) | |
x86: mm: use ARCH_HAS_DEBUG_WX instead of arch defined
Extract DEBUG_WX to mm/Kconfig.debug for shared use. Change to use
ARCH_HAS_DEBUG_WX instead of DEBUG_WX defined by arch port.
Signed-off-by: Zong Li <zong.li@sifive.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will@kernel.org>
Link: http://lkml.kernel.org/r/430736828d149df3f5b462d291e845ec690e0141.1587455584.git.zong.li@sifive.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/x86/Kconfig.debug')
| -rw-r--r-- | arch/x86/Kconfig.debug | 27 |
1 files changed, 0 insertions, 27 deletions
diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug index f909d3ce36e6..fdf1431ac8c2 100644 --- a/arch/x86/Kconfig.debug +++ b/arch/x86/Kconfig.debug @@ -72,33 +72,6 @@ config EFI_PGT_DUMP issues with the mapping of the EFI runtime regions into that table. -config DEBUG_WX - bool "Warn on W+X mappings at boot" - select PTDUMP_CORE - ---help--- - Generate a warning if any W+X mappings are found at boot. - - This is useful for discovering cases where the kernel is leaving - W+X mappings after applying NX, as such mappings are a security risk. - - Look for a message in dmesg output like this: - - x86/mm: Checked W+X mappings: passed, no W+X pages found. - - or like this, if the check failed: - - x86/mm: Checked W+X mappings: FAILED, <N> W+X pages found. - - Note that even if the check fails, your kernel is possibly - still fine, as W+X mappings are not a security hole in - themselves, what they do is that they make the exploitation - of other unfixed kernel bugs easier. - - There is no runtime or memory usage effect of this option - once the kernel has booted up - it's a one time check. - - If in doubt, say "Y". - config DEBUG_TLBFLUSH bool "Set upper limit of TLB entries to flush one-by-one" depends on DEBUG_KERNEL |