diff options
Diffstat (limited to 'arch/arm/Kconfig')
| -rw-r--r-- | arch/arm/Kconfig | 25 |
1 files changed, 20 insertions, 5 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 41cbb4a53066..0d1b717e1eca 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -188,6 +188,9 @@ config ARCH_HAS_ILOG2_U64 config ARCH_HAS_BANDGAP bool +config FIX_EARLYCON_MEM + def_bool y if MMU + config GENERIC_HWEIGHT bool default y @@ -1496,6 +1499,7 @@ config HOTPLUG_CPU config ARM_PSCI bool "Support for the ARM Power State Coordination Interface (PSCI)" depends on CPU_V7 + select ARM_PSCI_FW help Say Y here if you want Linux to communicate with system firmware implementing the PSCI specification for CPU-centric power @@ -1700,13 +1704,24 @@ config HIGHPTE consumed by page tables. Setting this option will allow user-space 2nd level page tables to reside in high memory. -config HW_PERF_EVENTS - bool "Enable hardware performance counter support for perf events" - depends on PERF_EVENTS +config CPU_SW_DOMAIN_PAN + bool "Enable use of CPU domains to implement privileged no-access" + depends on MMU && !ARM_LPAE default y help - Enable hardware performance counter support for perf events. If - disabled, perf events will use software events only. + Increase kernel security by ensuring that normal kernel accesses + are unable to access userspace addresses. This can help prevent + use-after-free bugs becoming an exploitable privilege escalation + by ensuring that magic values (such as LIST_POISON) will always + fault when dereferenced. + + CPUs with low-vector mappings use a best-efforts implementation. + Their lower 1MB needs to remain accessible for the vectors, but + the remainder of userspace will become appropriately inaccessible. + +config HW_PERF_EVENTS + def_bool y + depends on ARM_PMU config SYS_SUPPORTS_HUGETLBFS def_bool y |