config ARM64 def_bool y select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE select ARCH_HAS_ELF_RANDOMIZE select ARCH_HAS_SG_CHAIN select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST select ARCH_USE_CMPXCHG_LOCKREF select ARCH_SUPPORTS_ATOMIC_RMW select ARCH_WANT_OPTIONAL_GPIOLIB select ARCH_WANT_COMPAT_IPC_PARSE_VERSION select ARCH_WANT_FRAME_POINTERS select ARCH_HAVE_CUSTOM_GPIO_H select ARM_AMBA select ARM_ARCH_TIMER select ARM_GIC select AUDIT_ARCH_COMPAT_GENERIC select ARM_GIC_V3 select BUILDTIME_EXTABLE_SORT select CLONE_BACKWARDS select COMMON_CLK if !ARCH_MSM select CPU_PM if (SUSPEND || CPU_IDLE) select DCACHE_WORD_ACCESS select GENERIC_ALLOCATOR select EDAC_SUPPORT select GENERIC_CLOCKEVENTS select GENERIC_CLOCKEVENTS_BROADCAST if SMP select GENERIC_CPU_AUTOPROBE select GENERIC_EARLY_IOREMAP select GENERIC_IOMAP select GENERIC_IRQ_PROBE select GENERIC_IRQ_SHOW select GENERIC_SCHED_CLOCK select GENERIC_SMP_IDLE_THREAD select GENERIC_STRNCPY_FROM_USER select GENERIC_STRNLEN_USER select GENERIC_TIME_VSYSCALL select HANDLE_DOMAIN_IRQ select HARDIRQS_SW_RESEND select HAVE_ALIGNED_STRUCT_PAGE if SLUB select HAVE_ARCH_AUDITSYSCALL select HAVE_ARCH_JUMP_LABEL select HAVE_ARCH_KGDB select HAVE_ARCH_SECCOMP_FILTER select HAVE_ARCH_TRACEHOOK select HAVE_BPF_JIT select HAVE_C_RECORDMCOUNT select HAVE_CC_STACKPROTECTOR select HAVE_CMPXCHG_DOUBLE select HAVE_DEBUG_BUGVERBOSE select HAVE_DEBUG_KMEMLEAK select HAVE_DMA_API_DEBUG select HAVE_DMA_ATTRS select HAVE_DMA_CONTIGUOUS select HAVE_DYNAMIC_FTRACE select HAVE_EFFICIENT_UNALIGNED_ACCESS select HAVE_FTRACE_MCOUNT_RECORD select HAVE_FUNCTION_TRACER select HAVE_FUNCTION_GRAPH_TRACER select HAVE_GENERIC_DMA_COHERENT select HAVE_IRQ_TIME_ACCOUNTING select HAVE_MEMBLOCK select HAVE_PATA_PLATFORM select HAVE_PERF_EVENTS select HAVE_PERF_REGS select HAVE_PERF_USER_STACK_DUMP select HAVE_RCU_TABLE_FREE select HAVE_SYSCALL_TRACEPOINTS select IRQ_DOMAIN select MODULES_USE_ELF_RELA select NO_BOOTMEM select OF select OF_EARLY_FLATTREE select OF_RESERVED_MEM select PERF_USE_VMALLOC select POWER_RESET select POWER_SUPPLY select RTC_LIB select SPARSE_IRQ select SYSCTL_EXCEPTION_TRACE select HAVE_CONTEXT_TRACKING select MSM_JTAGV8 if CORESIGHT_ETMV4 help ARM 64-bit (AArch64) Linux support. config 64BIT def_bool y config ARCH_PHYS_ADDR_T_64BIT def_bool y config MMU def_bool y config NO_IOPORT_MAP def_bool y if !PCI config STACKTRACE_SUPPORT def_bool y config LOCKDEP_SUPPORT def_bool y config TRACE_IRQFLAGS_SUPPORT def_bool y config RWSEM_XCHGADD_ALGORITHM def_bool y config GENERIC_BUG def_bool y depends on BUG config GENERIC_HWEIGHT def_bool y config GENERIC_CSUM def_bool y config GENERIC_CALIBRATE_DELAY def_bool y config ZONE_DMA def_bool y config HAVE_GENERIC_RCU_GUP def_bool y config ARCH_DMA_ADDR_T_64BIT def_bool y config NEED_DMA_MAP_STATE def_bool y config NEED_SG_DMA_LENGTH def_bool y config ARM64_DMA_USE_IOMMU bool select ARM_HAS_SG_CHAIN select NEED_SG_DMA_LENGTH if ARM64_DMA_USE_IOMMU config ARM64_DMA_IOMMU_ALIGNMENT int "Maximum PAGE_SIZE order of alignment for DMA IOMMU buffers" range 4 9 default 8 help DMA mapping framework by default aligns all buffers to the smallest PAGE_SIZE order which is greater than or equal to the requested buffer size. This works well for buffers up to a few hundreds kilobytes, but for larger buffers it just a waste of address space. Drivers which has relatively small addressing window (like 64Mib) might run out of virtual space with just a few allocations. With this parameter you can specify the maximum PAGE_SIZE order for DMA IOMMU buffers. Larger buffers will be aligned only to this specified order. The order is expressed as a power of two multiplied by the PAGE_SIZE. endif config SWIOTLB def_bool y config IOMMU_HELPER def_bool SWIOTLB config KERNEL_MODE_NEON def_bool y config FIX_EARLYCON_MEM def_bool y source "init/Kconfig" source "kernel/Kconfig.freezer" menu "Platform selection" config ARCH_THUNDER bool "Cavium Inc. Thunder SoC Family" help This enables support for Cavium's Thunder Family of SoCs. config ARCH_VEXPRESS bool "ARMv8 software model (Versatile Express)" select ARCH_REQUIRE_GPIOLIB select COMMON_CLK_VERSATILE select POWER_RESET_VEXPRESS select VEXPRESS_CONFIG help This enables support for the ARMv8 software model (Versatile Express). config ARCH_XGENE bool "AppliedMicro X-Gene SOC Family" help This enables support for AppliedMicro X-Gene SOC Family config ARCH_MSM bool "Qualcomm Platforms" select ARCH_REQUIRE_GPIOLIB select CLKDEV_LOOKUP select HAVE_CLK select HAVE_CLK_PREPARE select MSM_IRQ select PINCTRL select SOC_BUS select PM_OPP select PCI select PM_DEVFREQ select MSM_DEVFREQ_DEVBW select MSM_BIMC_BWMON select MSMCCI_HWMON select MSM_M4M_HWMON select DEVFREQ_GOV_MSM_BW_HWMON select DEVFREQ_GOV_MSM_CACHE_HWMON select DEVFREQ_SIMPLE_DEV select ARCH_HAS_OPP select THERMAL_WRITABLE_TRIPS select CPU_FREQ_MSM select ARM_MEMLAT_MON select DEVFREQ_GOV_MEMLAT help This enables support for the ARMv8 based Qualcomm chipsets. config ARCH_MSM8916 bool "Enable Support for Qualcomm MSM8916" depends on ARCH_MSM help This enables support for the MSM8916 chipset. If you don't know what to do here, say N config ARCH_MSMTITANIUM bool "Enable Support for Qualcomm Technologies Inc MSMTITANIUM" depends on ARCH_MSM help This enables support for the MSMTITANIUM chipset. If you don't know what to do here, say N config ARCH_MSMTHORIUM bool "Enable Support for Qualcomm Technologies Inc MSMTHORIUM" depends on ARCH_MSM help This enables support for the MSMTHORIUM chipset. If you don't know what to do here, say N config ARCH_MSM8996 bool "Enable Support for Qualcomm MSM8996" depends on ARCH_MSM help This enables support for the MSM8996 chipset. If you don't know what to do here, say N config ARCH_MSMCOBALT bool "Enable Support for Qualcomm MSMCOBALT" depends on ARCH_MSM help This enables support for the MSMCOBALT chipset. If you do not wish to build a kernel that runs on this chipset, say 'N' here. config ARCH_MSM8994_V1_TLBI_WA bool "Enable MSM8994 v1 TLBI workaround" depends on ARCH_MSM8994 help This enables support for the MSM8994 v1 TLBI workaround. This workaround is required for MSM8994 V1 revision where the [39:38] bits of VA are tied to zero and due to which TLBI operations with VA or ASID will not work. endmenu config SEC_FACTORY bool "when it comes to sec factory mode" default n help It will support a sec factory mode config SEC_HEROQLTE_PROJECT depends on ARCH_MSM8996 default n bool "Samsung HEROQLTE Project" help Support for Samsung HEROQLTE Project config MACH_HEROQLTE_ACG depends on SEC_HEROQLTE_PROJECT default n bool "Samsung HEROQLTE USA ACG" help Support for Samsung HEROQLTE USA ACG device. config MACH_HEROQLTE_ATT depends on SEC_HEROQLTE_PROJECT default n bool "Samsung HEROQLTE USA ATT" help Support for Samsung HEROQLTE USA ATT device. config MACH_HEROQLTE_CHNZC depends on SEC_HEROQLTE_PROJECT select PROC_TASK_STATE_CHN_ORDER default n bool "Samsung HEROQLTE CHN OPEN" help Support for Samsung HEROQLTE CHN OPEN device. config MACH_HEROQLTE_DCM depends on SEC_HEROQLTE_PROJECT default n bool "Samsung HEROQLTE JPN DCM" help Support for Samsung HEROQLTE JPN DCM device. config MACH_HEROQLTE_KDI depends on SEC_HEROQLTE_PROJECT default n bool "Samsung HEROQLTE JPN KDI" help Support for Samsung HEROQLTE JPN KDI device. config MACH_HEROQLTE_SPR depends on SEC_HEROQLTE_PROJECT default n bool "Samsung HEROQLTE USA SPR" help Support for Samsung HEROQLTE USA SPR device. config MACH_HEROQLTE_TMO depends on SEC_HEROQLTE_PROJECT default n bool "Samsung HEROQLTE USA TMO" help Support for Samsung HEROQLTE USA TMO device. config MACH_HEROQLTE_USC depends on SEC_HEROQLTE_PROJECT default n bool "Samsung HEROQLTE USA USC" help Support for Samsung HEROQLTE USA USC device. config MACH_HEROQLTE_VZW depends on SEC_HEROQLTE_PROJECT default n bool "Samsung HEROQLTE USA VZW" help Support for Samsung HEROQLTE USA VZW device. config MACH_HEROQLTE_MTR depends on SEC_HEROQLTE_PROJECT default n bool "Samsung HEROQLTE USA MTR" help Support for Samsung HEROQLTE USA MTR device. config SEC_HERO2QLTE_PROJECT depends on ARCH_MSM8996 default n bool "Samsung HERO2QLTE Project" help Support for Samsung HERO2QLTE Project config MACH_HERO2QLTE_ATT depends on SEC_HERO2QLTE_PROJECT default n bool "Samsung HERO2QLTE USA ATT" help Support for Samsung HERO2QLTE USA ATT device. config MACH_HERO2QLTE_CHNZC depends on SEC_HERO2QLTE_PROJECT select PROC_TASK_STATE_CHN_ORDER default n bool "Samsung HERO2QLTE CHN OPEN" help Support for Samsung HERO2QLTE CHN OPEN device. config MACH_HERO2QLTE_SPR depends on SEC_HERO2QLTE_PROJECT default n bool "Samsung HERO2QLTE USA SPR" help Support for Samsung HERO2QLTE USA SPR device. config MACH_HERO2QLTE_TMO depends on SEC_HERO2QLTE_PROJECT default n bool "Samsung HERO2QLTE USA TMO" help Support for Samsung HERO2QLTE USA TMO device. config MACH_HERO2QLTE_USC depends on SEC_HERO2QLTE_PROJECT default n bool "Samsung HERO2QLTE USA USC" help Support for Samsung HERO2QLTE USA USC device. config MACH_HERO2QLTE_VZW depends on SEC_HERO2QLTE_PROJECT default n bool "Samsung HERO2QLTE USA VZW" help Support for Samsung HERO2QLTE USA VZW device. config MACH_HERO2QLTE_DCM depends on SEC_HERO2QLTE_PROJECT default n bool "Samsung HERO2QLTE JPN DCM" help Support for Samsung HERO2QLTE JPN DCM device. config MACH_HERO2QLTE_KDI depends on SEC_HERO2QLTE_PROJECT default n bool "Samsung HERO2QLTE JPN KDI" help Support for Samsung HERO2QLTE JPN KDI device. config SEC_AEROQLTE_PROJECT depends on ARCH_MSM8996 default n bool "Samsung AEROQLTE Project" help Support for Samsung AEROQLTE Project config MACH_AEROQLTE_VZW depends on SEC_AEROQLTE_PROJECT default n bool "Samsung AEROQLTE USA VZW" help Support for Samsung AEROQLTE USA VZW device. config SEC_LUCKYQLTE_DSC_PROJECT depends on ARCH_MSM8996 default n bool "Samsung LUCKYQLTE DSC Project" help Support for Samsung LUCKYQLTE DSC Project config SAMSUNG_PRODUCT_SHIP bool "set up for product shipping" default n menu "Bus support" config ARM_AMBA bool config PCI bool "PCI support" help This feature enables support for PCI bus system. If you say Y here, the kernel will include drivers and infrastructure code to support PCI bus devices. config PCI_DOMAINS def_bool PCI config PCI_DOMAINS_GENERIC def_bool PCI config PCI_SYSCALL def_bool PCI source "drivers/pci/Kconfig" source "drivers/pci/pcie/Kconfig" source "drivers/pci/hotplug/Kconfig" endmenu menu "Kernel Features" menu "ARM errata workarounds via the alternatives framework" config ARM64_ERRATUM_826319 bool "Cortex-A53: 826319: System might deadlock if a write cannot complete until read data is accepted" default y help This option adds an alternative code sequence to work around ARM erratum 826319 on Cortex-A53 parts up to r0p2 with an AMBA 4 ACE or AXI master interface and an L2 cache. If a Cortex-A53 uses an AMBA AXI4 ACE interface to other processors and is unable to accept a certain write via this interface, it will not progress on read data presented on the read data channel and the system can deadlock. The workaround promotes data cache clean instructions to data cache clean-and-invalidate. Please note that this does not necessarily enable the workaround, as it depends on the alternative framework, which will only patch the kernel if an affected CPU is detected. If unsure, say Y. config ARM64_ERRATUM_827319 bool "Cortex-A53: 827319: Data cache clean instructions might cause overlapping transactions to the interconnect" default y help This option adds an alternative code sequence to work around ARM erratum 827319 on Cortex-A53 parts up to r0p2 with an AMBA 5 CHI master interface and an L2 cache. Under certain conditions this erratum can cause a clean line eviction to occur at the same time as another transaction to the same address on the AMBA 5 CHI interface, which can cause data corruption if the interconnect reorders the two transactions. The workaround promotes data cache clean instructions to data cache clean-and-invalidate. Please note that this does not necessarily enable the workaround, as it depends on the alternative framework, which will only patch the kernel if an affected CPU is detected. If unsure, say Y. config ARM64_ERRATUM_824069 bool "Cortex-A53: 824069: Cache line might not be marked as clean after a CleanShared snoop" default y help This option adds an alternative code sequence to work around ARM erratum 824069 on Cortex-A53 parts up to r0p2 when it is connected to a coherent interconnect. If a Cortex-A53 processor is executing a store or prefetch for write instruction at the same time as a processor in another cluster is executing a cache maintenance operation to the same address, then this erratum might cause a clean cache line to be incorrectly marked as dirty. The workaround promotes data cache clean instructions to data cache clean-and-invalidate. Please note that this option does not necessarily enable the workaround, as it depends on the alternative framework, which will only patch the kernel if an affected CPU is detected. If unsure, say Y. config ARM64_ERRATUM_819472 bool "Cortex-A53: 819472: Store exclusive instructions might cause data corruption" default y help This option adds an alternative code sequence to work around ARM erratum 819472 on Cortex-A53 parts up to r0p1 with an L2 cache present when it is connected to a coherent interconnect. If the processor is executing a load and store exclusive sequence at the same time as a processor in another cluster is executing a cache maintenance operation to the same address, then this erratum might cause data corruption. The workaround promotes data cache clean instructions to data cache clean-and-invalidate. Please note that this does not necessarily enable the workaround, as it depends on the alternative framework, which will only patch the kernel if an affected CPU is detected. If unsure, say Y. config ARM64_ERRATUM_832075 bool "Cortex-A57: 832075: possible deadlock on mixing exclusive memory accesses with device loads" default y help This option adds an alternative code sequence to work around ARM erratum 832075 on Cortex-A57 parts up to r1p2. Affected Cortex-A57 parts might deadlock when exclusive load/store instructions to Write-Back memory are mixed with Device loads. The workaround is to promote device loads to use Load-Acquire semantics. Please note that this does not necessarily enable the workaround, as it depends on the alternative framework, which will only patch the kernel if an affected CPU is detected. If unsure, say Y. config ARM64_ERRATUM_845719 bool "Cortex-A53: 845719: a load might read incorrect data" depends on COMPAT default y help This option adds an alternative code sequence to work around ARM erratum 845719 on Cortex-A53 parts up to r0p4. When running a compat (AArch32) userspace on an affected Cortex-A53 part, a load at EL0 from a virtual address that matches the bottom 32 bits of the virtual address used by a recent load at (AArch64) EL1 might return incorrect data. The workaround is to write the contextidr_el1 register on exception return to a 32-bit task. Please note that this does not necessarily enable the workaround, as it depends on the alternative framework, which will only patch the kernel if an affected CPU is detected. If unsure, say Y. endmenu choice prompt "Page size" default ARM64_4K_PAGES help Page size (translation granule) configuration. config ARM64_4K_PAGES bool "4KB" help This feature enables 4KB pages support. config ARM64_64K_PAGES bool "64KB" help This feature enables 64KB pages support (4KB by default) allowing only two levels of page tables and faster TLB look-up. AArch32 emulation is not available when this feature is enabled. endchoice config ARM64_DCACHE_DISABLE bool "Disable CPU Data Caches" help Disable CPU data cache usage by setting the SCTLR[C] bit during kernel initialization. This will result in a considerable performance impact, but may be useful in certain situations. If you are not sure what to do, select 'N' here. config ARM64_ICACHE_DISABLE bool "Disable CPU Instruction Caches" help Disable CPU instruction cache usage by setting the SCTLR[I] bit during kernel initialization. This will result in a considerable performance impact, but may be useful in certain situations. If you are not sure what to do, select 'N' here. config MSM_APP_API bool "API support to enable / disable app settings for MSM8996" depends on ARCH_MSM8996 && (ENABLE_FP_SIMD_SETTINGS || MSM_APP_SETTINGS) help Add API support to enable / disable the app settings to be used at runtime. If you are not sure what to do, select 'N' here. config ENABLE_FP_SIMD_SETTINGS bool "Enable FP(Floating Point) Settings for Qualcomm MSM8996" depends on ARCH_MSM8996 select MSM_APP_API help Enable FP(Floating Point) and SIMD settings for the MSM8996 during the execution of the aarch32 processes and disable these settings when you switch to the aarch64 processes. If you are not sure what to do, select 'N' here. config MSM_APP_SETTINGS bool "Support to enable / disable app settings for MSM8996" depends on ARCH_MSM8996 select MSM_APP_API help Expose an interface used by the userspace at runtime to enable / disable the app specific settings. If you are not sure what to do, select 'N' here. choice prompt "Virtual address space size" default ARM64_VA_BITS_39 if ARM64_4K_PAGES default ARM64_VA_BITS_42 if ARM64_64K_PAGES help Allows choosing one of multiple possible virtual address space sizes. The level of translation table is determined by a combination of page size and virtual address space size. config ARM64_VA_BITS_39 bool "39-bit" depends on ARM64_4K_PAGES config ARM64_VA_BITS_42 bool "42-bit" depends on ARM64_64K_PAGES config ARM64_VA_BITS_48 bool "48-bit" depends on !ARM_SMMU endchoice config ARM64_VA_BITS int default 39 if ARM64_VA_BITS_39 default 42 if ARM64_VA_BITS_42 default 48 if ARM64_VA_BITS_48 config ARM64_PGTABLE_LEVELS int default 2 if ARM64_64K_PAGES && ARM64_VA_BITS_42 default 3 if ARM64_64K_PAGES && ARM64_VA_BITS_48 default 3 if ARM64_4K_PAGES && ARM64_VA_BITS_39 default 4 if ARM64_4K_PAGES && ARM64_VA_BITS_48 config CPU_BIG_ENDIAN bool "Build big-endian kernel" help Say Y if you plan on running a kernel in big-endian mode. config ARM64_STLR_NEEDS_BARRIER bool "Store-Release operations require explicit barriers" def_bool ARCH_MSM8996 help Some early samples of MSMTHULIUM SoCs require that an explicit barrier be executed prior to any Store-Release operation (STLR) to comform to ARM memory ordering requirements. If you are building the kernel to work on one of these early designs, select 'Y' here. For production kernels, you should say 'N' here. config ARM64_SEV_IN_LOCK_UNLOCK bool "Add explicit SEV in the spinlock unlock code path: def_bool ARCH_MSM8996 help In certain unexplained cases, the stlr alone might not wakeup the processor waiting in WFE on a spinlock. Add an explicity dsb and SEV in write_unlock, read_unlock and spin_unlock to ensure that the core waiting on the lock wakes up from WFE. config SMP bool "Symmetric Multi-Processing" help This enables support for systems with more than one CPU. If you say N here, the kernel will run on single and multiprocessor machines, but will use only one CPU of a multiprocessor machine. If you say Y here, the kernel will run on many, but not all, single processor machines. On a single processor machine, the kernel will run faster if you say N here. If you don't know what to do here, say N. config SCHED_MC bool "Multi-core scheduler support" depends on SMP help Multi-core scheduler support improves the CPU scheduler's decision making when dealing with multi-core CPU chips at a cost of slightly increased overhead in some places. If unsure say N here. config SCHED_SMT bool "SMT scheduler support" depends on SMP help Improves the CPU scheduler's decision making when dealing with MultiThreading at a cost of slightly increased overhead in some places. If unsure say N here. config SCHED_MC bool "Multi-core scheduler support" depends on ARM_CPU_TOPOLOGY help Multi-core scheduler support improves the CPU scheduler's decision making when dealing with multi-core CPU chips at a cost of slightly increased overhead in some places. If unsure say N here. config SCHED_SMT bool "SMT scheduler support" depends on ARM_CPU_TOPOLOGY help Improves the CPU scheduler's decision making when dealing with MultiThreading at a cost of slightly increased overhead in some places. If unsure say N here. config NR_CPUS int "Maximum number of CPUs (2-64)" range 2 64 depends on SMP # These have to remain sorted largest to smallest default "8" config HOTPLUG_CPU bool "Support for hot-pluggable CPUs" depends on SMP help Say Y here to experiment with turning CPUs off and on. CPUs can be controlled through /sys/devices/system/cpu. # The GPIO number here must be sorted by descending number. In case of # a multiplatform kernel, we just want the highest value required by the # selected platforms. config ARCH_NR_GPIO int default 1024 if ARCH_TEGRA default 1024 if ARCH_MSM default 256 help Maximum number of GPIOs in the system. If unsure, leave the default value. source kernel/Kconfig.preempt config HZ int default 100 config ARCH_HAS_HOLES_MEMORYMODEL def_bool y if SPARSEMEM config ARCH_SPARSEMEM_ENABLE def_bool y select SPARSEMEM_VMEMMAP_ENABLE config ARCH_SPARSEMEM_DEFAULT def_bool ARCH_SPARSEMEM_ENABLE config ARCH_SELECT_MEMORY_MODEL def_bool ARCH_SPARSEMEM_ENABLE config HAVE_ARCH_PFN_VALID def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM config HW_PERF_EVENTS bool "Enable hardware performance counter support for perf events" depends on PERF_EVENTS default y help Enable hardware performance counter support for perf events. If disabled, perf events will use software events only. config PERF_EVENTS_USERMODE bool "Enable usermode access for perf events" depends on PERF_EVENTS help Enable user-mode access to performance counters for perf events. If enabled, the access permissions allowing CPU performance counters to be accessed from user-mode are set. If you want user-mode programs to access perf events, say Y config PERF_EVENTS_RESET_PMU_DEBUGFS bool "Reset PMU via debugfs node" depends on PERF_EVENTS help Enable the debugfs node that can be used to reset PMUs and all state variables associated with PMUs. If enabled, PMU and internal state variable are cleared. If you want to reset PMU and PMU related internal Perf variables via debugfs then say Y. config ARM64_REG_REBALANCE_ON_CTX_SW bool "Rebalance registers during context switches." def_bool ARCH_MSM8996 help Forcefully re-balance register rename pools on context switches for improved performance on some devices. config SYS_SUPPORTS_HUGETLBFS def_bool y config ARCH_WANT_GENERAL_HUGETLB def_bool y config ARCH_WANT_HUGE_PMD_SHARE def_bool y if !ARM64_64K_PAGES config HAVE_ARCH_TRANSPARENT_HUGEPAGE def_bool y config ARCH_HAS_CACHE_LINE_SIZE def_bool y source "mm/Kconfig" config SECCOMP bool "Enable seccomp to safely compute untrusted bytecode" ---help--- This kernel feature is useful for number crunching applications that may need to compute untrusted bytecode during their execution. By using pipes or other transports made available to the process as file descriptors supporting the read/write syscalls, it's possible to isolate those applications in their own address space using seccomp. Once seccomp is enabled via prctl(PR_SET_SECCOMP), it cannot be disabled and the task is only allowed to execute a few safe syscalls defined by each seccomp mode. config XEN_DOM0 def_bool y depends on XEN config XEN bool "Xen guest support on ARM64" depends on ARM64 && OF select SWIOTLB_XEN help Say Y if you want to run Linux in a Virtual Machine on Xen on ARM64. config FORCE_MAX_ZONEORDER int default "14" if (ARM64_64K_PAGES && TRANSPARENT_HUGEPAGE) default "11" menuconfig ARMV8_DEPRECATED bool "Emulate deprecated/obsolete ARMv8 instructions" depends on COMPAT help Legacy software support may require certain instructions that have been deprecated or obsoleted in the architecture. Enable this config to enable selective emulation of these features. If unsure, say Y if ARMV8_DEPRECATED config SWP_EMULATION bool "Emulate SWP/SWPB instructions" help ARMv8 obsoletes the use of A32 SWP/SWPB instructions such that they are always undefined. Say Y here to enable software emulation of these instructions for userspace using LDXR/STXR. In some older versions of glibc [<=2.8] SWP is used during futex trylock() operations with the assumption that the code will not be preempted. This invalid assumption may be more likely to fail with SWP emulation enabled, leading to deadlock of the user application. NOTE: when accessing uncached shared regions, LDXR/STXR rely on an external transaction monitoring block called a global monitor to maintain update atomicity. If your system does not implement a global monitor, this option can cause programs that perform SWP operations to uncached memory to deadlock. If unsure, say Y config CP15_BARRIER_EMULATION bool "Emulate CP15 Barrier instructions" help The CP15 barrier instructions - CP15ISB, CP15DSB, and CP15DMB - are deprecated in ARMv8 (and ARMv7). It is strongly recommended to use the ISB, DSB, and DMB instructions instead. Say Y here to enable software emulation of these instructions for AArch32 userspace code. When this option is enabled, CP15 barrier usage is traced which can help identify software that needs updating. If unsure, say Y config SETEND_EMULATION bool "Emulate SETEND instruction" help The SETEND instruction alters the data-endianness of the AArch32 EL0, and is deprecated in ARMv8. Say Y here to enable software emulation of the instruction for AArch32 userspace code. Note: All the cpus on the system must have mixed endian support at EL0 for this feature to be enabled. If a new CPU - which doesn't support mixed endian - is hotplugged in after this feature has been enabled, there could be unexpected results in the applications. If unsure, say Y endif endmenu menu "Boot options" config CMDLINE string "Default kernel command string" default "" help Provide a set of default command-line options at build time by entering them here. As a minimum, you should specify the the root device (e.g. root=/dev/nfs). choice prompt "Kernel command line type" if CMDLINE != "" default CMDLINE_FROM_BOOTLOADER config CMDLINE_FROM_BOOTLOADER bool "Use bootloader kernel arguments if available" help Uses the command-line options passed by the boot loader. If the boot loader doesn't provide any, the default kernel command string provided in CMDLINE will be used. config CMDLINE_EXTEND bool "Extend bootloader kernel arguments" help The command-line arguments provided by the boot loader will be appended to the default kernel command string. config CMDLINE_FORCE bool "Always use the default kernel command string" help Always use the default kernel command string, even if the boot loader passes other arguments to the kernel. This is useful if you cannot or don't want to change the command-line options your boot loader passes to the kernel. endchoice config EFI_STUB bool config EFI bool "UEFI runtime support" depends on OF && !CPU_BIG_ENDIAN select LIBFDT select UCS2_STRING select EFI_PARAMS_FROM_FDT select EFI_RUNTIME_WRAPPERS select EFI_STUB select EFI_ARMSTUB default y help This option provides support for runtime services provided by UEFI firmware (such as non-volatile variables, realtime clock, and platform reset). A UEFI stub is also provided to allow the kernel to be booted as an EFI application. This is only useful on systems that have UEFI firmware. config BUILD_ARM64_APPENDED_DTB_IMAGE bool "Build a concatenated Image.gz/dtb by default" depends on OF help Enabling this option will cause a concatenated Image.gz and list of DTBs to be built by default (instead of a standalone Image.gz.) The image will built in arch/arm64/boot/Image.gz-dtb config BUILD_ARM64_APPENDED_DTB_IMAGE_NAMES string "Default dtb names" depends on BUILD_ARM64_APPENDED_DTB_IMAGE help Space separated list of names of dtbs to append when building a concatenated Image.gz-dtb. endmenu menu "Userspace binary formats" source "fs/Kconfig.binfmt" config COMPAT bool "Kernel support for 32-bit EL0" depends on !ARM64_64K_PAGES select COMPAT_BINFMT_ELF select HAVE_UID16 select OLD_SIGSUSPEND3 select COMPAT_OLD_SIGACTION help This option enables support for a 32-bit EL0 running under a 64-bit kernel at EL1. AArch32-specific components such as system calls, the user helper functions, VFP support and the ptrace interface are handled appropriately by the kernel. If you want to execute 32-bit userspace applications, say Y. config SYSVIPC_COMPAT def_bool y depends on COMPAT && SYSVIPC endmenu menu "Power management options" source "kernel/power/Kconfig" config ARCH_SUSPEND_POSSIBLE def_bool y config ARM64_CPU_SUSPEND def_bool PM_SLEEP endmenu menu "CPU Power Management" source "drivers/cpuidle/Kconfig" source "drivers/cpufreq/Kconfig" endmenu # # BEGIN RKP_CFP CONFIG OPTIONS # menu "Control Flow Protection" config RKP_CFP bool "Hyperdrive ROP protection" # depends on TIMA_RKP # Disable RKP for now, keep getting TIMA_RKP_VMM_PANIC when doing sleep.S code for saving/restoring x17. default n help Static binary instrumentation of direct/indirect branches to prevent return-oriented programming (ROP) attacks and jump-oriented programming (JOP) attacks. config RKP_CFP_ROPP bool "Hyperdrive: encrypt return-addresses" select RKP_CFP default n help XOR return-addresses with the reserved key register on call/return from functions to encrypt/decrypt return-addresses before they are pushed onto the stack. Also, save the key during context-switches and suspend/resume cycles. choice prompt "ROPP key" default RKP_CFP_ROPP_RANDOM_KEY depends on RKP_CFP && RKP_CFP_ROPP help ROPP key configuration config RKP_CFP_ROPP_HYPKEY bool "Use hypervisor for key secure storage" help if n, use random key or zero key config RKP_CFP_ROPP_RANDOM_KEY bool "Hyperdrive: use pseudo random key for return-address encryption" help if n, use hyp key or zero key config RKP_CFP_ROPP_ZERO_KEY bool "Hyperdrive: use zero key for return-address encryption" help if n, use hyp key or random key endchoice config RKP_CFP_JOPP bool "Just to function entry only, Restrict BLR jump target to a valid function entry point and no br in C code" select RKP_CFP default n help We need nop spacers above ever potential target of a blr jump instruction. The compiler already adds spacers for C functions. We need to define a VECTOR_ENTRY macro for exception vector definitions. We don't want to add nops to exception vectors, since they need PRECISE alignment. Need to put FALLTHROUGH for ASM fall through No BR in C code requires to disable BPF, as it has a lot of jump, which can be used as dispatch gadget for JOPP config RKP_CFP_JOPP_MAGIC hex "Magic number put just above function labels to restrict BLR to function entry points" # depends on RKP_CFP && RKP_CFP_JOPP # basically it depends on above line but it's needed for avoiding a build break default "0xb3ea3bad" config RKP_CFP_FIX_SMC_BUG bool "Hyperdrive: [INSECURE] hack broken smc calls to save/restore RRK after it clobbers it" depends on RKP_CFP_ROPP default n help As of bootloader version "G920VVRE1BOE4" of the TrustZone for exynos7420, the smc instruction sets register x17 to zero. Too bad for us, we store our key there! In the meantime, save x17 (and other reserved registers) before making the call. To reproduce this bug, disable this option and set a JTAG breakpoint at exynos_smc_readsfr which gets called during early boot (start_kernel). Watch x17 get zeroed after the smc call returns. ADDITIONAL BUG BECAUSE OF THIS: If we take an interrupt at the instruction IMMEDIATELY after "smc #0", we won't be able to restore x17 to the key before entering el1_irq. To work around this, we reload the key in kernel_entry. endmenu # # END RKP_CFP CONFIG OPTIONS # config DRV_SAMSUNG bool "samsung device dedicated drivers option" default y help This is driver option for samsung sec_class Say y here to enable samsung classes for drivers Provide option of enabling sec class Supports sec drivers key, touch, sec_debug etc config RTC_AUTO_PWRON bool "RTC Auto Power on PM8994 PMICs" depends on ARCH_MSM8996 default n help Support for the auto power on alarm on the PM8994 PMIC. Say Y if you want to enable this feature. config RTC_AUTO_PWRON_PARAM bool "RTC Auto Power on with param PM8994 PMICs" depends on RTC_AUTO_PWRON default n help This option is used to prevent invalid RTC alarm power on. Say Y if you want to enable this feature. config BT_BCM4359 bool "Enable BCM4359 driver" default n help Adds BCM4358 RFKILL driver for Broadcom BCM4359 chipset. default is n. config BT_BLUESLEEP bool "Enable BlUESLEEP driver" default n help Adds BlUESLEEP driver for Broadcom chipset. default is n. config RELOCATABLE_KERNEL bool "set kernel to relocatable in both virtual and physical address" default y help This configuare will allow you to config the kernel into position independent kernel, with '--PIE' insert into LD script. config TIMA_RKP bool "Samsung KNOX realtime kernel protection" depends on TIMA default n help this enables realtime kernel protection config RKP_KDP bool "Protection for cred structure" depends on TIMA_RKP default n help Prevents unauthorized cred modification. config RKP_NS_PROT bool "Protection for cred structure" depends on RKP_KDP default n help Prevents unauthorized cred modification. config RKP_DMAP_PROT bool "Page Double Mapping protection" depends on RKP_KDP default n help Prevents unauthorized mapping for page table. config BARCODE_PAINTER bool "Bootloader Barcode Print MSM8996" depends on ARCH_MSM8996 default n help This option is used to add Barcode Print Func. Say Y if you want to enable this feature. config USER_RESET_DEBUG bool "reset reason debug feature in user version" default n help This option provides reset history log in user version. This option enable proc/reset_reason support config SEC_PERIPHERAL_SECURE_CHK bool "PERIPHERAL SECURE check" default n help To check the authentication of peripheral image. source "net/Kconfig" source "drivers/Kconfig" source "drivers/firmware/Kconfig" source "fs/Kconfig" source "arch/arm64/kvm/Kconfig" source "arch/arm64/Kconfig.debug" source "security/Kconfig" source "crypto/Kconfig" if CRYPTO source "arch/arm64/crypto/Kconfig" endif source "lib/Kconfig" source "arch/arm64/mm/Kconfig"