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| author | Zong Li <zong.li@sifive.com> | 2020-06-03 16:04:02 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-06-03 20:09:50 -0700 |
| commit | 09587a09ada2ed7c39aedfa2681152b5ac5641ee (patch) | |
| tree | d7529e65340660b52b2f9f0f9048bddb36a227db | |
| parent | 7e01ccb43d62558dc65c53477a78da133ad8c377 (diff) | |
| download | linux-09587a09ada2ed7c39aedfa2681152b5ac5641ee.tar.bz2 | |
arm64: 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/e19709e7576f65e303245fe520cad5f7bae72763.1587455584.git.zong.li@sifive.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | arch/arm64/Kconfig | 1 | ||||
| -rw-r--r-- | arch/arm64/Kconfig.debug | 29 |
2 files changed, 1 insertions, 29 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 1a9b480c6f1d..d0bc8bae7c8d 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -9,6 +9,7 @@ config ARM64 select ACPI_MCFG if (ACPI && PCI) select ACPI_SPCR_TABLE if ACPI select ACPI_PPTT if ACPI + select ARCH_HAS_DEBUG_WX select ARCH_BINFMT_ELF_STATE select ARCH_HAS_DEBUG_VIRTUAL select ARCH_HAS_DEVMEM_IS_ALLOWED diff --git a/arch/arm64/Kconfig.debug b/arch/arm64/Kconfig.debug index a1efa246c9ed..cdf7ec0b975e 100644 --- a/arch/arm64/Kconfig.debug +++ b/arch/arm64/Kconfig.debug @@ -23,35 +23,6 @@ config ARM64_RANDOMIZE_TEXT_OFFSET of TEXT_OFFSET and platforms must not require a specific value. -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. - This check also includes UXN, which should be set on all kernel - mappings. - - Look for a message in dmesg output like this: - - arm64/mm: Checked W+X mappings: passed, no W+X pages found. - - or like this, if the check failed: - - arm64/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_EFI depends on EFI && DEBUG_INFO bool "UEFI debugging" |