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1239 lines
37 KiB
1239 lines
37 KiB
# SPDX-License-Identifier: GPL-2.0 |
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source "arch/powerpc/platforms/Kconfig.cputype" |
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config 32BIT |
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bool |
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default y if PPC32 |
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config 64BIT |
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bool |
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default y if PPC64 |
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config MMU |
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bool |
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default y |
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config ARCH_MMAP_RND_BITS_MAX |
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# On Book3S 64, the default virtual address space for 64-bit processes |
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# is 2^47 (128TB). As a maximum, allow randomisation to consume up to |
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# 32T of address space (2^45), which should ensure a reasonable gap |
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# between bottom-up and top-down allocations for applications that |
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# consume "normal" amounts of address space. Book3S 64 only supports 64K |
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# and 4K page sizes. |
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default 29 if PPC_BOOK3S_64 && PPC_64K_PAGES # 29 = 45 (32T) - 16 (64K) |
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default 33 if PPC_BOOK3S_64 # 33 = 45 (32T) - 12 (4K) |
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# |
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# On all other 64-bit platforms (currently only Book3E), the virtual |
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# address space is 2^46 (64TB). Allow randomisation to consume up to 16T |
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# of address space (2^44). Only 4K page sizes are supported. |
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default 32 if 64BIT # 32 = 44 (16T) - 12 (4K) |
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# |
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# For 32-bit, use the compat values, as they're the same. |
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default ARCH_MMAP_RND_COMPAT_BITS_MAX |
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config ARCH_MMAP_RND_BITS_MIN |
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# Allow randomisation to consume up to 1GB of address space (2^30). |
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default 14 if 64BIT && PPC_64K_PAGES # 14 = 30 (1GB) - 16 (64K) |
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default 18 if 64BIT # 18 = 30 (1GB) - 12 (4K) |
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# |
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# For 32-bit, use the compat values, as they're the same. |
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default ARCH_MMAP_RND_COMPAT_BITS_MIN |
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config ARCH_MMAP_RND_COMPAT_BITS_MAX |
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# Total virtual address space for 32-bit processes is 2^31 (2GB). |
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# Allow randomisation to consume up to 512MB of address space (2^29). |
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default 11 if PPC_256K_PAGES # 11 = 29 (512MB) - 18 (256K) |
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default 13 if PPC_64K_PAGES # 13 = 29 (512MB) - 16 (64K) |
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default 15 if PPC_16K_PAGES # 15 = 29 (512MB) - 14 (16K) |
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default 17 # 17 = 29 (512MB) - 12 (4K) |
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config ARCH_MMAP_RND_COMPAT_BITS_MIN |
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# Total virtual address space for 32-bit processes is 2^31 (2GB). |
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# Allow randomisation to consume up to 8MB of address space (2^23). |
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default 5 if PPC_256K_PAGES # 5 = 23 (8MB) - 18 (256K) |
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default 7 if PPC_64K_PAGES # 7 = 23 (8MB) - 16 (64K) |
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default 9 if PPC_16K_PAGES # 9 = 23 (8MB) - 14 (16K) |
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default 11 # 11 = 23 (8MB) - 12 (4K) |
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config HAVE_SETUP_PER_CPU_AREA |
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def_bool PPC64 |
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config NEED_PER_CPU_EMBED_FIRST_CHUNK |
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def_bool y if PPC64 |
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config NEED_PER_CPU_PAGE_FIRST_CHUNK |
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def_bool y if PPC64 |
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config NR_IRQS |
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int "Number of virtual interrupt numbers" |
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range 32 1048576 |
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default "512" |
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help |
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This defines the number of virtual interrupt numbers the kernel |
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can manage. Virtual interrupt numbers are what you see in |
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/proc/interrupts. If you configure your system to have too few, |
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drivers will fail to load or worse - handle with care. |
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config NMI_IPI |
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bool |
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depends on SMP && (DEBUGGER || KEXEC_CORE || HARDLOCKUP_DETECTOR) |
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default y |
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config PPC_WATCHDOG |
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bool |
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depends on HARDLOCKUP_DETECTOR |
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depends on HAVE_HARDLOCKUP_DETECTOR_ARCH |
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default y |
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help |
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This is a placeholder when the powerpc hardlockup detector |
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watchdog is selected (arch/powerpc/kernel/watchdog.c). It is |
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selected via the generic lockup detector menu which is why we |
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have no standalone config option for it here. |
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config STACKTRACE_SUPPORT |
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bool |
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default y |
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config TRACE_IRQFLAGS_SUPPORT |
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bool |
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default y |
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config LOCKDEP_SUPPORT |
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bool |
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default y |
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config GENERIC_LOCKBREAK |
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bool |
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default y |
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depends on SMP && PREEMPTION |
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config GENERIC_HWEIGHT |
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bool |
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default y |
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config PPC |
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bool |
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default y |
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# |
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# Please keep this list sorted alphabetically. |
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# |
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select ARCH_32BIT_OFF_T if PPC32 |
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select ARCH_ENABLE_MEMORY_HOTPLUG |
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select ARCH_ENABLE_MEMORY_HOTREMOVE |
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select ARCH_HAS_COPY_MC if PPC64 |
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select ARCH_HAS_DEBUG_VIRTUAL |
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select ARCH_HAS_DEBUG_VM_PGTABLE |
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select ARCH_HAS_DEVMEM_IS_ALLOWED |
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select ARCH_HAS_DMA_MAP_DIRECT if PPC_PSERIES |
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select ARCH_HAS_ELF_RANDOMIZE |
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select ARCH_HAS_FORTIFY_SOURCE |
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select ARCH_HAS_GCOV_PROFILE_ALL |
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select ARCH_HAS_HUGEPD if HUGETLB_PAGE |
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select ARCH_HAS_KCOV |
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select ARCH_HAS_MEMBARRIER_CALLBACKS |
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select ARCH_HAS_MEMBARRIER_SYNC_CORE |
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select ARCH_HAS_MEMREMAP_COMPAT_ALIGN |
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select ARCH_HAS_MMIOWB if PPC64 |
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select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE |
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select ARCH_HAS_PHYS_TO_DMA |
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select ARCH_HAS_PMEM_API |
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select ARCH_HAS_PTE_DEVMAP if PPC_BOOK3S_64 |
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select ARCH_HAS_PTE_SPECIAL |
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select ARCH_HAS_SCALED_CPUTIME if VIRT_CPU_ACCOUNTING_NATIVE && PPC_BOOK3S_64 |
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select ARCH_HAS_SET_MEMORY |
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select ARCH_HAS_STRICT_KERNEL_RWX if ((PPC_BOOK3S_64 || PPC32) && !HIBERNATION) |
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select ARCH_HAS_STRICT_MODULE_RWX if ARCH_HAS_STRICT_KERNEL_RWX && !PPC_BOOK3S_32 |
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select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST |
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select ARCH_HAS_UACCESS_FLUSHCACHE |
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select ARCH_HAS_UBSAN_SANITIZE_ALL |
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select ARCH_HAVE_NMI_SAFE_CMPXCHG |
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select ARCH_KEEP_MEMBLOCK |
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select ARCH_MIGHT_HAVE_PC_PARPORT |
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select ARCH_MIGHT_HAVE_PC_SERIO |
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select ARCH_OPTIONAL_KERNEL_RWX if ARCH_HAS_STRICT_KERNEL_RWX |
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select ARCH_STACKWALK |
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select ARCH_SUPPORTS_ATOMIC_RMW |
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select ARCH_SUPPORTS_DEBUG_PAGEALLOC if PPC32 || PPC_BOOK3S_64 |
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select ARCH_USE_BUILTIN_BSWAP |
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select ARCH_USE_CMPXCHG_LOCKREF if PPC64 |
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select ARCH_USE_MEMTEST |
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select ARCH_USE_QUEUED_RWLOCKS if PPC_QUEUED_SPINLOCKS |
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select ARCH_USE_QUEUED_SPINLOCKS if PPC_QUEUED_SPINLOCKS |
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select ARCH_WANT_IPC_PARSE_VERSION |
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select ARCH_WANT_IRQS_OFF_ACTIVATE_MM |
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select ARCH_WANT_LD_ORPHAN_WARN |
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select ARCH_WEAK_RELEASE_ACQUIRE |
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select BINFMT_ELF |
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select BUILDTIME_TABLE_SORT |
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select CLONE_BACKWARDS |
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select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN |
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select DMA_OPS_BYPASS if PPC64 |
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select DMA_OPS if PPC64 |
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select DYNAMIC_FTRACE if FUNCTION_TRACER |
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select EDAC_ATOMIC_SCRUB |
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select EDAC_SUPPORT |
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select GENERIC_ATOMIC64 if PPC32 |
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select GENERIC_CLOCKEVENTS_BROADCAST if SMP |
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select GENERIC_CMOS_UPDATE |
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select GENERIC_CPU_AUTOPROBE |
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select GENERIC_CPU_VULNERABILITIES if PPC_BARRIER_NOSPEC |
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select GENERIC_EARLY_IOREMAP |
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select GENERIC_GETTIMEOFDAY |
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select GENERIC_IRQ_SHOW |
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select GENERIC_IRQ_SHOW_LEVEL |
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select GENERIC_PCI_IOMAP if PCI |
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select GENERIC_SMP_IDLE_THREAD |
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select GENERIC_STRNCPY_FROM_USER |
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select GENERIC_STRNLEN_USER |
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select GENERIC_TIME_VSYSCALL |
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select GENERIC_VDSO_TIME_NS |
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select HAVE_ARCH_AUDITSYSCALL |
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select HAVE_ARCH_HUGE_VMALLOC if HAVE_ARCH_HUGE_VMAP |
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select HAVE_ARCH_HUGE_VMAP if PPC_RADIX_MMU || PPC_8xx |
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select HAVE_ARCH_JUMP_LABEL |
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select HAVE_ARCH_JUMP_LABEL_RELATIVE |
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select HAVE_ARCH_KASAN if PPC32 && PPC_PAGE_SHIFT <= 14 |
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select HAVE_ARCH_KASAN_VMALLOC if PPC32 && PPC_PAGE_SHIFT <= 14 |
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select HAVE_ARCH_KFENCE if PPC32 |
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select HAVE_ARCH_KGDB |
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select HAVE_ARCH_MMAP_RND_BITS |
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select HAVE_ARCH_MMAP_RND_COMPAT_BITS if COMPAT |
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select HAVE_ARCH_NVRAM_OPS |
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select HAVE_ARCH_SECCOMP_FILTER |
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select HAVE_ARCH_TRACEHOOK |
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select HAVE_ASM_MODVERSIONS |
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select HAVE_CONTEXT_TRACKING if PPC64 |
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select HAVE_C_RECORDMCOUNT |
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select HAVE_DEBUG_KMEMLEAK |
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select HAVE_DEBUG_STACKOVERFLOW |
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select HAVE_DYNAMIC_FTRACE |
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select HAVE_DYNAMIC_FTRACE_WITH_REGS if MPROFILE_KERNEL |
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select HAVE_EBPF_JIT |
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select HAVE_EFFICIENT_UNALIGNED_ACCESS if !(CPU_LITTLE_ENDIAN && POWER7_CPU) |
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select HAVE_FAST_GUP |
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select HAVE_FTRACE_MCOUNT_RECORD |
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select HAVE_FUNCTION_ERROR_INJECTION |
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select HAVE_FUNCTION_GRAPH_TRACER |
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select HAVE_FUNCTION_TRACER |
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select HAVE_GCC_PLUGINS if GCC_VERSION >= 50200 # plugin support on gcc <= 5.1 is buggy on PPC |
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select HAVE_GENERIC_VDSO |
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select HAVE_HARDLOCKUP_DETECTOR_ARCH if PPC_BOOK3S_64 && SMP |
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select HAVE_HARDLOCKUP_DETECTOR_PERF if PERF_EVENTS && HAVE_PERF_EVENTS_NMI && !HAVE_HARDLOCKUP_DETECTOR_ARCH |
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select HAVE_HW_BREAKPOINT if PERF_EVENTS && (PPC_BOOK3S || PPC_8xx) |
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select HAVE_IOREMAP_PROT |
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select HAVE_IRQ_EXIT_ON_IRQ_STACK |
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select HAVE_IRQ_TIME_ACCOUNTING |
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select HAVE_KERNEL_GZIP |
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select HAVE_KERNEL_LZMA if DEFAULT_UIMAGE |
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select HAVE_KERNEL_LZO if DEFAULT_UIMAGE |
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select HAVE_KERNEL_XZ if PPC_BOOK3S || 44x |
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select HAVE_KPROBES |
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select HAVE_KPROBES_ON_FTRACE |
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select HAVE_KRETPROBES |
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select HAVE_LD_DEAD_CODE_DATA_ELIMINATION |
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select HAVE_LIVEPATCH if HAVE_DYNAMIC_FTRACE_WITH_REGS |
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select HAVE_MOD_ARCH_SPECIFIC |
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select HAVE_NMI if PERF_EVENTS || (PPC64 && PPC_BOOK3S) |
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select HAVE_OPTPROBES |
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select HAVE_PERF_EVENTS |
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select HAVE_PERF_EVENTS_NMI if PPC64 |
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select HAVE_PERF_REGS |
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select HAVE_PERF_USER_STACK_DUMP |
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select HAVE_REGS_AND_STACK_ACCESS_API |
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select HAVE_RELIABLE_STACKTRACE |
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select HAVE_RSEQ |
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select HAVE_SOFTIRQ_ON_OWN_STACK |
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select HAVE_STACKPROTECTOR if PPC32 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r2) |
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select HAVE_STACKPROTECTOR if PPC64 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r13) |
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select HAVE_SYSCALL_TRACEPOINTS |
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select HAVE_VIRT_CPU_ACCOUNTING |
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select HUGETLB_PAGE_SIZE_VARIABLE if PPC_BOOK3S_64 && HUGETLB_PAGE |
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select IOMMU_HELPER if PPC64 |
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select IRQ_DOMAIN |
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select IRQ_FORCED_THREADING |
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select MMU_GATHER_PAGE_SIZE |
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select MMU_GATHER_RCU_TABLE_FREE |
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select MODULES_USE_ELF_RELA |
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select NEED_DMA_MAP_STATE if PPC64 || NOT_COHERENT_CACHE |
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select NEED_SG_DMA_LENGTH |
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select OF |
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select OF_DMA_DEFAULT_COHERENT if !NOT_COHERENT_CACHE |
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select OF_EARLY_FLATTREE |
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select OLD_SIGACTION if PPC32 |
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select OLD_SIGSUSPEND |
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select PCI_DOMAINS if PCI |
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select PCI_MSI_ARCH_FALLBACKS if PCI_MSI |
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select PCI_SYSCALL if PCI |
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select PPC_DAWR if PPC64 |
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select RTC_LIB |
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select SPARSE_IRQ |
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select STRICT_KERNEL_RWX if STRICT_MODULE_RWX |
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select SYSCTL_EXCEPTION_TRACE |
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select THREAD_INFO_IN_TASK |
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select VIRT_TO_BUS if !PPC64 |
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# |
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# Please keep this list sorted alphabetically. |
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# |
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config PPC_BARRIER_NOSPEC |
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bool |
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default y |
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depends on PPC_BOOK3S_64 || PPC_FSL_BOOK3E |
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config EARLY_PRINTK |
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bool |
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default y |
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config PANIC_TIMEOUT |
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int |
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default 180 |
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config COMPAT |
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bool "Enable support for 32bit binaries" |
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depends on PPC64 |
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depends on !CC_IS_CLANG || CLANG_VERSION >= 120000 |
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default y if !CPU_LITTLE_ENDIAN |
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select ARCH_WANT_OLD_COMPAT_IPC |
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select COMPAT_OLD_SIGACTION |
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config SYSVIPC_COMPAT |
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bool |
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depends on COMPAT && SYSVIPC |
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default y |
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config SCHED_OMIT_FRAME_POINTER |
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bool |
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default y |
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config ARCH_MAY_HAVE_PC_FDC |
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bool |
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default PCI |
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config PPC_UDBG_16550 |
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bool |
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config GENERIC_TBSYNC |
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bool |
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default y if PPC32 && SMP |
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config AUDIT_ARCH |
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bool |
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default y |
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config GENERIC_BUG |
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bool |
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default y |
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depends on BUG |
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config GENERIC_BUG_RELATIVE_POINTERS |
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def_bool y |
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depends on GENERIC_BUG |
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config SYS_SUPPORTS_APM_EMULATION |
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default y if PMAC_APM_EMU |
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bool |
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config EPAPR_BOOT |
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bool |
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help |
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Used to allow a board to specify it wants an ePAPR compliant wrapper. |
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config DEFAULT_UIMAGE |
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bool |
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help |
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Used to allow a board to specify it wants a uImage built by default |
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config ARCH_HIBERNATION_POSSIBLE |
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bool |
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default y |
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config ARCH_SUSPEND_POSSIBLE |
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def_bool y |
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depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \ |
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(PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \ |
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|| 44x || 40x |
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config ARCH_SUSPEND_NONZERO_CPU |
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def_bool y |
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depends on PPC_POWERNV || PPC_PSERIES |
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config PPC_DCR_NATIVE |
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bool |
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config PPC_DCR_MMIO |
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bool |
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config PPC_DCR |
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bool |
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depends on PPC_DCR_NATIVE || PPC_DCR_MMIO |
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default y |
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config PPC_OF_PLATFORM_PCI |
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bool |
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depends on PCI |
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depends on PPC64 # not supported on 32 bits yet |
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config ARCH_SUPPORTS_UPROBES |
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def_bool y |
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config PPC_ADV_DEBUG_REGS |
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bool |
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depends on 40x || BOOKE |
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default y |
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config PPC_ADV_DEBUG_IACS |
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int |
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depends on PPC_ADV_DEBUG_REGS |
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default 4 if 44x |
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default 2 |
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config PPC_ADV_DEBUG_DACS |
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int |
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depends on PPC_ADV_DEBUG_REGS |
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default 2 |
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config PPC_ADV_DEBUG_DVCS |
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int |
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depends on PPC_ADV_DEBUG_REGS |
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default 2 if 44x |
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default 0 |
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config PPC_ADV_DEBUG_DAC_RANGE |
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bool |
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depends on PPC_ADV_DEBUG_REGS && 44x |
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default y |
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config PPC_DAWR |
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bool |
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config PGTABLE_LEVELS |
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int |
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default 2 if !PPC64 |
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default 4 |
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source "arch/powerpc/sysdev/Kconfig" |
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source "arch/powerpc/platforms/Kconfig" |
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|
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menu "Kernel options" |
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config HIGHMEM |
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bool "High memory support" |
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depends on PPC32 |
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select KMAP_LOCAL |
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source "kernel/Kconfig.hz" |
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config MATH_EMULATION |
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bool "Math emulation" |
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depends on 4xx || PPC_8xx || PPC_MPC832x || BOOKE || PPC_MICROWATT |
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select PPC_FPU_REGS |
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help |
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Some PowerPC chips designed for embedded applications do not have |
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a floating-point unit and therefore do not implement the |
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floating-point instructions in the PowerPC instruction set. If you |
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say Y here, the kernel will include code to emulate a floating-point |
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unit, which will allow programs that use floating-point |
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instructions to run. |
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|
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This is also useful to emulate missing (optional) instructions |
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such as fsqrt on cores that do have an FPU but do not implement |
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them (such as Freescale BookE). |
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choice |
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prompt "Math emulation options" |
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default MATH_EMULATION_FULL |
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depends on MATH_EMULATION |
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config MATH_EMULATION_FULL |
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bool "Emulate all the floating point instructions" |
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help |
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Select this option will enable the kernel to support to emulate |
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all the floating point instructions. If your SoC doesn't have |
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a FPU, you should select this. |
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|
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config MATH_EMULATION_HW_UNIMPLEMENTED |
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bool "Just emulate the FPU unimplemented instructions" |
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help |
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Select this if you know there does have a hardware FPU on your |
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SoC, but some floating point instructions are not implemented by that. |
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|
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endchoice |
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config PPC_TRANSACTIONAL_MEM |
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bool "Transactional Memory support for POWERPC" |
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depends on PPC_BOOK3S_64 |
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depends on SMP |
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select ALTIVEC |
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select VSX |
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help |
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Support user-mode Transactional Memory on POWERPC. |
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|
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config PPC_UV |
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bool "Ultravisor support" |
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depends on KVM_BOOK3S_HV_POSSIBLE |
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depends on DEVICE_PRIVATE |
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default n |
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help |
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This option paravirtualizes the kernel to run in POWER platforms that |
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supports the Protected Execution Facility (PEF). On such platforms, |
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the ultravisor firmware runs at a privilege level above the |
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hypervisor. |
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|
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If unsure, say "N". |
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|
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config LD_HEAD_STUB_CATCH |
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bool "Reserve 256 bytes to cope with linker stubs in HEAD text" if EXPERT |
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depends on PPC64 |
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help |
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Very large kernels can cause linker branch stubs to be generated by |
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code in head_64.S, which moves the head text sections out of their |
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specified location. This option can work around the problem. |
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|
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If unsure, say "N". |
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|
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config MPROFILE_KERNEL |
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depends on PPC64 && CPU_LITTLE_ENDIAN && FUNCTION_TRACER |
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def_bool $(success,$(srctree)/arch/powerpc/tools/gcc-check-mprofile-kernel.sh $(CC) -I$(srctree)/include -D__KERNEL__) |
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config HOTPLUG_CPU |
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bool "Support for enabling/disabling CPUs" |
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depends on SMP && (PPC_PSERIES || \ |
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PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE) |
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help |
|
Say Y here to be able to disable and re-enable individual |
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CPUs at runtime on SMP machines. |
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|
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Say N if you are unsure. |
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|
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config PPC_QUEUED_SPINLOCKS |
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bool "Queued spinlocks" if EXPERT |
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depends on SMP |
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default PPC_BOOK3S_64 |
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help |
|
Say Y here to use queued spinlocks which give better scalability and |
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fairness on large SMP and NUMA systems without harming single threaded |
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performance. |
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|
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config ARCH_CPU_PROBE_RELEASE |
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def_bool y |
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depends on HOTPLUG_CPU |
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|
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config PPC64_SUPPORTS_MEMORY_FAILURE |
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bool "Add support for memory hwpoison" |
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depends on PPC_BOOK3S_64 |
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default "y" if PPC_POWERNV |
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select ARCH_SUPPORTS_MEMORY_FAILURE |
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|
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config KEXEC |
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bool "kexec system call" |
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depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E |
|
select KEXEC_CORE |
|
help |
|
kexec is a system call that implements the ability to shutdown your |
|
current kernel, and to start another kernel. It is like a reboot |
|
but it is independent of the system firmware. And like a reboot |
|
you can start any kernel with it, not just Linux. |
|
|
|
The name comes from the similarity to the exec system call. |
|
|
|
It is an ongoing process to be certain the hardware in a machine |
|
is properly shutdown, so do not be surprised if this code does not |
|
initially work for you. As of this writing the exact hardware |
|
interface is strongly in flux, so no good recommendation can be |
|
made. |
|
|
|
config KEXEC_FILE |
|
bool "kexec file based system call" |
|
select KEXEC_CORE |
|
select HAVE_IMA_KEXEC if IMA |
|
select BUILD_BIN2C |
|
select KEXEC_ELF |
|
depends on PPC64 |
|
depends on CRYPTO=y |
|
depends on CRYPTO_SHA256=y |
|
help |
|
This is a new version of the kexec system call. This call is |
|
file based and takes in file descriptors as system call arguments |
|
for kernel and initramfs as opposed to a list of segments as is the |
|
case for the older kexec call. |
|
|
|
config ARCH_HAS_KEXEC_PURGATORY |
|
def_bool KEXEC_FILE |
|
|
|
config RELOCATABLE |
|
bool "Build a relocatable kernel" |
|
depends on PPC64 || (FLATMEM && (44x || FSL_BOOKE)) |
|
select NONSTATIC_KERNEL |
|
select MODULE_REL_CRCS if MODVERSIONS |
|
help |
|
This builds a kernel image that is capable of running at the |
|
location the kernel is loaded at. For ppc32, there is no any |
|
alignment restrictions, and this feature is a superset of |
|
DYNAMIC_MEMSTART and hence overrides it. For ppc64, we should use |
|
16k-aligned base address. The kernel is linked as a |
|
position-independent executable (PIE) and contains dynamic relocations |
|
which are processed early in the bootup process. |
|
|
|
One use is for the kexec on panic case where the recovery kernel |
|
must live at a different physical address than the primary |
|
kernel. |
|
|
|
Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address |
|
it has been loaded at and the compile time physical addresses |
|
CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START |
|
setting can still be useful to bootwrappers that need to know the |
|
load address of the kernel (eg. u-boot/mkimage). |
|
|
|
config RANDOMIZE_BASE |
|
bool "Randomize the address of the kernel image" |
|
depends on (FSL_BOOKE && FLATMEM && PPC32) |
|
depends on RELOCATABLE |
|
help |
|
Randomizes the virtual address at which the kernel image is |
|
loaded, as a security feature that deters exploit attempts |
|
relying on knowledge of the location of kernel internals. |
|
|
|
If unsure, say Y. |
|
|
|
config RELOCATABLE_TEST |
|
bool "Test relocatable kernel" |
|
depends on (PPC64 && RELOCATABLE) |
|
help |
|
This runs the relocatable kernel at the address it was initially |
|
loaded at, which tends to be non-zero and therefore test the |
|
relocation code. |
|
|
|
config CRASH_DUMP |
|
bool "Build a dump capture kernel" |
|
depends on PPC64 || PPC_BOOK3S_32 || FSL_BOOKE || (44x && !SMP) |
|
select RELOCATABLE if PPC64 || 44x || FSL_BOOKE |
|
help |
|
Build a kernel suitable for use as a dump capture kernel. |
|
The same kernel binary can be used as production kernel and dump |
|
capture kernel. |
|
|
|
config FA_DUMP |
|
bool "Firmware-assisted dump" |
|
depends on PPC64 && (PPC_RTAS || PPC_POWERNV) |
|
select CRASH_CORE |
|
select CRASH_DUMP |
|
help |
|
A robust mechanism to get reliable kernel crash dump with |
|
assistance from firmware. This approach does not use kexec, |
|
instead firmware assists in booting the capture kernel |
|
while preserving memory contents. Firmware-assisted dump |
|
is meant to be a kdump replacement offering robustness and |
|
speed not possible without system firmware assistance. |
|
|
|
If unsure, say "y". Only special kernels like petitboot may |
|
need to say "N" here. |
|
|
|
config PRESERVE_FA_DUMP |
|
bool "Preserve Firmware-assisted dump" |
|
depends on PPC64 && PPC_POWERNV && !FA_DUMP |
|
help |
|
On a kernel with FA_DUMP disabled, this option helps to preserve |
|
crash data from a previously crash'ed kernel. Useful when the next |
|
memory preserving kernel boot would process this crash data. |
|
Petitboot kernel is the typical usecase for this option. |
|
|
|
config OPAL_CORE |
|
bool "Export OPAL memory as /sys/firmware/opal/core" |
|
depends on PPC64 && PPC_POWERNV |
|
help |
|
This option uses the MPIPL support in firmware to provide an |
|
ELF core of OPAL memory after a crash. The ELF core is exported |
|
as /sys/firmware/opal/core file which is helpful in debugging |
|
OPAL crashes using GDB. |
|
|
|
config IRQ_ALL_CPUS |
|
bool "Distribute interrupts on all CPUs by default" |
|
depends on SMP |
|
help |
|
This option gives the kernel permission to distribute IRQs across |
|
multiple CPUs. Saying N here will route all IRQs to the first |
|
CPU. Generally saying Y is safe, although some problems have been |
|
reported with SMP Power Macintoshes with this option enabled. |
|
|
|
config NUMA |
|
bool "NUMA Memory Allocation and Scheduler Support" |
|
depends on PPC64 && SMP |
|
default y if PPC_PSERIES || PPC_POWERNV |
|
help |
|
Enable NUMA (Non-Uniform Memory Access) support. |
|
|
|
The kernel will try to allocate memory used by a CPU on the |
|
local memory controller of the CPU and add some more |
|
NUMA awareness to the kernel. |
|
|
|
config NODES_SHIFT |
|
int |
|
default "8" if PPC64 |
|
default "4" |
|
depends on NUMA |
|
|
|
config USE_PERCPU_NUMA_NODE_ID |
|
def_bool y |
|
depends on NUMA |
|
|
|
config HAVE_MEMORYLESS_NODES |
|
def_bool y |
|
depends on NUMA |
|
|
|
config ARCH_SELECT_MEMORY_MODEL |
|
def_bool y |
|
depends on PPC64 |
|
|
|
config ARCH_FLATMEM_ENABLE |
|
def_bool y |
|
depends on (PPC64 && !NUMA) || PPC32 |
|
|
|
config ARCH_SPARSEMEM_ENABLE |
|
def_bool y |
|
depends on PPC64 |
|
select SPARSEMEM_VMEMMAP_ENABLE |
|
|
|
config ARCH_SPARSEMEM_DEFAULT |
|
def_bool y |
|
depends on PPC_BOOK3S_64 |
|
|
|
config ILLEGAL_POINTER_VALUE |
|
hex |
|
# This is roughly half way between the top of user space and the bottom |
|
# of kernel space, which seems about as good as we can get. |
|
default 0x5deadbeef0000000 if PPC64 |
|
default 0 |
|
|
|
config ARCH_MEMORY_PROBE |
|
def_bool y |
|
depends on MEMORY_HOTPLUG |
|
|
|
choice |
|
prompt "Page size" |
|
default PPC_4K_PAGES |
|
help |
|
Select the kernel logical page size. Increasing the page size |
|
will reduce software overhead at each page boundary, allow |
|
hardware prefetch mechanisms to be more effective, and allow |
|
larger dma transfers increasing IO efficiency and reducing |
|
overhead. However the utilization of memory will increase. |
|
For example, each cached file will using a multiple of the |
|
page size to hold its contents and the difference between the |
|
end of file and the end of page is wasted. |
|
|
|
Some dedicated systems, such as software raid serving with |
|
accelerated calculations, have shown significant increases. |
|
|
|
If you configure a 64 bit kernel for 64k pages but the |
|
processor does not support them, then the kernel will simulate |
|
them with 4k pages, loading them on demand, but with the |
|
reduced software overhead and larger internal fragmentation. |
|
For the 32 bit kernel, a large page option will not be offered |
|
unless it is supported by the configured processor. |
|
|
|
If unsure, choose 4K_PAGES. |
|
|
|
config PPC_4K_PAGES |
|
bool "4k page size" |
|
select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64 |
|
|
|
config PPC_16K_PAGES |
|
bool "16k page size" |
|
depends on 44x || PPC_8xx |
|
|
|
config PPC_64K_PAGES |
|
bool "64k page size" |
|
depends on 44x || PPC_BOOK3S_64 |
|
select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64 |
|
|
|
config PPC_256K_PAGES |
|
bool "256k page size (Requires non-standard binutils settings)" |
|
depends on 44x && !PPC_47x |
|
help |
|
Make the page size 256k. |
|
|
|
The kernel will only be able to run applications that have been |
|
compiled with '-zmax-page-size' set to 256K (the default is 64K) using |
|
binutils later than 2.17.50.0.3, or by patching the ELF_MAXPAGESIZE |
|
definition from 0x10000 to 0x40000 in older versions. |
|
|
|
endchoice |
|
|
|
config PPC_PAGE_SHIFT |
|
int |
|
default 18 if PPC_256K_PAGES |
|
default 16 if PPC_64K_PAGES |
|
default 14 if PPC_16K_PAGES |
|
default 12 |
|
|
|
config THREAD_SHIFT |
|
int "Thread shift" if EXPERT |
|
range 13 15 |
|
default "15" if PPC_256K_PAGES |
|
default "14" if PPC64 |
|
default "14" if KASAN |
|
default "13" |
|
help |
|
Used to define the stack size. The default is almost always what you |
|
want. Only change this if you know what you are doing. |
|
|
|
config DATA_SHIFT_BOOL |
|
bool "Set custom data alignment" |
|
depends on ADVANCED_OPTIONS |
|
depends on STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE |
|
depends on PPC_BOOK3S_32 || (PPC_8xx && !PIN_TLB_DATA && !STRICT_KERNEL_RWX) |
|
help |
|
This option allows you to set the kernel data alignment. When |
|
RAM is mapped by blocks, the alignment needs to fit the size and |
|
number of possible blocks. The default should be OK for most configs. |
|
|
|
Say N here unless you know what you are doing. |
|
|
|
config DATA_SHIFT |
|
int "Data shift" if DATA_SHIFT_BOOL |
|
default 24 if STRICT_KERNEL_RWX && PPC64 |
|
range 17 28 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE) && PPC_BOOK3S_32 |
|
range 19 23 if (STRICT_KERNEL_RWX || DEBUG_PAGEALLOC || KFENCE) && PPC_8xx |
|
default 22 if STRICT_KERNEL_RWX && PPC_BOOK3S_32 |
|
default 18 if (DEBUG_PAGEALLOC || KFENCE) && PPC_BOOK3S_32 |
|
default 23 if STRICT_KERNEL_RWX && PPC_8xx |
|
default 23 if (DEBUG_PAGEALLOC || KFENCE) && PPC_8xx && PIN_TLB_DATA |
|
default 19 if (DEBUG_PAGEALLOC || KFENCE) && PPC_8xx |
|
default PPC_PAGE_SHIFT |
|
help |
|
On Book3S 32 (603+), DBATs are used to map kernel text and rodata RO. |
|
Smaller is the alignment, greater is the number of necessary DBATs. |
|
|
|
On 8xx, large pages (512kb or 8M) are used to map kernel linear |
|
memory. Aligning to 8M reduces TLB misses as only 8M pages are used |
|
in that case. If PIN_TLB is selected, it must be aligned to 8M as |
|
8M pages will be pinned. |
|
|
|
config FORCE_MAX_ZONEORDER |
|
int "Maximum zone order" |
|
range 8 9 if PPC64 && PPC_64K_PAGES |
|
default "9" if PPC64 && PPC_64K_PAGES |
|
range 13 13 if PPC64 && !PPC_64K_PAGES |
|
default "13" if PPC64 && !PPC_64K_PAGES |
|
range 9 64 if PPC32 && PPC_16K_PAGES |
|
default "9" if PPC32 && PPC_16K_PAGES |
|
range 7 64 if PPC32 && PPC_64K_PAGES |
|
default "7" if PPC32 && PPC_64K_PAGES |
|
range 5 64 if PPC32 && PPC_256K_PAGES |
|
default "5" if PPC32 && PPC_256K_PAGES |
|
range 11 64 |
|
default "11" |
|
help |
|
The kernel memory allocator divides physically contiguous memory |
|
blocks into "zones", where each zone is a power of two number of |
|
pages. This option selects the largest power of two that the kernel |
|
keeps in the memory allocator. If you need to allocate very large |
|
blocks of physically contiguous memory, then you may need to |
|
increase this value. |
|
|
|
This config option is actually maximum order plus one. For example, |
|
a value of 11 means that the largest free memory block is 2^10 pages. |
|
|
|
The page size is not necessarily 4KB. For example, on 64-bit |
|
systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep |
|
this in mind when choosing a value for this option. |
|
|
|
config PPC_SUBPAGE_PROT |
|
bool "Support setting protections for 4k subpages (subpage_prot syscall)" |
|
default n |
|
depends on PPC_BOOK3S_64 && PPC_64K_PAGES |
|
help |
|
This option adds support for system call to allow user programs |
|
to set access permissions (read/write, readonly, or no access) |
|
on the 4k subpages of each 64k page. |
|
|
|
If unsure, say N here. |
|
|
|
config PPC_PROT_SAO_LPAR |
|
bool "Support PROT_SAO mappings in LPARs" |
|
depends on PPC_BOOK3S_64 |
|
help |
|
This option adds support for PROT_SAO mappings from userspace |
|
inside LPARs on supported CPUs. |
|
|
|
This may cause issues when performing guest migration from |
|
a CPU that supports SAO to one that does not. |
|
|
|
If unsure, say N here. |
|
|
|
config PPC_COPRO_BASE |
|
bool |
|
|
|
config SCHED_SMT |
|
bool "SMT (Hyperthreading) scheduler support" |
|
depends on PPC64 && SMP |
|
help |
|
SMT scheduler support improves the CPU scheduler's decision making |
|
when dealing with POWER5 cpus at a cost of slightly increased |
|
overhead in some places. If unsure say N here. |
|
|
|
config PPC_DENORMALISATION |
|
bool "PowerPC denormalisation exception handling" |
|
depends on PPC_BOOK3S_64 |
|
default "y" if PPC_POWERNV |
|
help |
|
Add support for handling denormalisation of single precision |
|
values. Useful for bare metal only. If unsure say Y here. |
|
|
|
config CMDLINE |
|
string "Initial kernel command string" |
|
default "" |
|
help |
|
On some platforms, there is currently no way for the boot loader to |
|
pass arguments to the kernel. For these platforms, you can supply |
|
some command-line options at build time by entering them here. In |
|
most cases you will need to specify the root device here. |
|
|
|
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 EXTRA_TARGETS |
|
string "Additional default image types" |
|
help |
|
List additional targets to be built by the bootwrapper here (separated |
|
by spaces). This is useful for targets that depend of device tree |
|
files in the .dts directory. |
|
|
|
Targets in this list will be build as part of the default build |
|
target, or when the user does a 'make zImage' or a |
|
'make zImage.initrd'. |
|
|
|
If unsure, leave blank |
|
|
|
config ARCH_WANTS_FREEZER_CONTROL |
|
def_bool y |
|
depends on ADB_PMU |
|
|
|
source "kernel/power/Kconfig" |
|
|
|
config PPC_MEM_KEYS |
|
prompt "PowerPC Memory Protection Keys" |
|
def_bool y |
|
depends on PPC_BOOK3S_64 |
|
select ARCH_USES_HIGH_VMA_FLAGS |
|
select ARCH_HAS_PKEYS |
|
help |
|
Memory Protection Keys provides a mechanism for enforcing |
|
page-based protections, but without requiring modification of the |
|
page tables when an application changes protection domains. |
|
|
|
For details, see Documentation/core-api/protection-keys.rst |
|
|
|
If unsure, say y. |
|
|
|
config PPC_SECURE_BOOT |
|
prompt "Enable secure boot support" |
|
bool |
|
depends on PPC_POWERNV || PPC_PSERIES |
|
depends on IMA_ARCH_POLICY |
|
imply IMA_SECURE_AND_OR_TRUSTED_BOOT |
|
help |
|
Systems with firmware secure boot enabled need to define security |
|
policies to extend secure boot to the OS. This config allows a user |
|
to enable OS secure boot on systems that have firmware support for |
|
it. If in doubt say N. |
|
|
|
config PPC_SECVAR_SYSFS |
|
bool "Enable sysfs interface for POWER secure variables" |
|
default y |
|
depends on PPC_SECURE_BOOT |
|
depends on SYSFS |
|
help |
|
POWER secure variables are managed and controlled by firmware. |
|
These variables are exposed to userspace via sysfs to enable |
|
read/write operations on these variables. Say Y if you have |
|
secure boot enabled and want to expose variables to userspace. |
|
|
|
config PPC_RTAS_FILTER |
|
bool "Enable filtering of RTAS syscalls" |
|
default y |
|
depends on PPC_RTAS |
|
help |
|
The RTAS syscall API has security issues that could be used to |
|
compromise system integrity. This option enforces restrictions on the |
|
RTAS calls and arguments passed by userspace programs to mitigate |
|
these issues. |
|
|
|
Say Y unless you know what you are doing and the filter is causing |
|
problems for you. |
|
|
|
endmenu |
|
|
|
config ISA_DMA_API |
|
bool |
|
default PCI |
|
|
|
menu "Bus options" |
|
|
|
config ISA |
|
bool "Support for ISA-bus hardware" |
|
depends on PPC_CHRP |
|
select PPC_I8259 |
|
help |
|
Find out whether you have ISA slots on your motherboard. ISA is the |
|
name of a bus system, i.e. the way the CPU talks to the other stuff |
|
inside your box. If you have an Apple machine, say N here; if you |
|
have an IBM RS/6000 or pSeries machine, say Y. If you have an |
|
embedded board, consult your board documentation. |
|
|
|
config GENERIC_ISA_DMA |
|
bool |
|
depends on ISA_DMA_API |
|
default y |
|
|
|
config PPC_INDIRECT_PCI |
|
bool |
|
depends on PCI |
|
default y if 40x || 44x |
|
|
|
config SBUS |
|
bool |
|
|
|
config FSL_SOC |
|
bool |
|
|
|
config FSL_PCI |
|
bool |
|
select ARCH_HAS_DMA_SET_MASK |
|
select PPC_INDIRECT_PCI |
|
select PCI_QUIRKS |
|
|
|
config FSL_PMC |
|
bool |
|
default y |
|
depends on SUSPEND && (PPC_85xx || PPC_86xx) |
|
help |
|
Freescale MPC85xx/MPC86xx power management controller support |
|
(suspend/resume). For MPC83xx see platforms/83xx/suspend.c |
|
|
|
config PPC4xx_CPM |
|
bool |
|
default y |
|
depends on SUSPEND && (44x || 40x) |
|
help |
|
PPC4xx Clock Power Management (CPM) support (suspend/resume). |
|
It also enables support for two different idle states (idle-wait |
|
and idle-doze). |
|
|
|
config 4xx_SOC |
|
bool |
|
|
|
config FSL_LBC |
|
bool "Freescale Local Bus support" |
|
help |
|
Enables reporting of errors from the Freescale local bus |
|
controller. Also contains some common code used by |
|
drivers for specific local bus peripherals. |
|
|
|
config FSL_GTM |
|
bool |
|
depends on PPC_83xx || QUICC_ENGINE || CPM2 |
|
help |
|
Freescale General-purpose Timers support |
|
|
|
config PCI_8260 |
|
bool |
|
depends on PCI && 8260 |
|
select PPC_INDIRECT_PCI |
|
default y |
|
|
|
config FSL_RIO |
|
bool "Freescale Embedded SRIO Controller support" |
|
depends on RAPIDIO = y && HAVE_RAPIDIO |
|
default "n" |
|
help |
|
Include support for RapidIO controller on Freescale embedded |
|
processors (MPC8548, MPC8641, etc). |
|
|
|
endmenu |
|
|
|
config NONSTATIC_KERNEL |
|
bool |
|
|
|
menu "Advanced setup" |
|
depends on PPC32 |
|
|
|
config ADVANCED_OPTIONS |
|
bool "Prompt for advanced kernel configuration options" |
|
help |
|
This option will enable prompting for a variety of advanced kernel |
|
configuration options. These options can cause the kernel to not |
|
work if they are set incorrectly, but can be used to optimize certain |
|
aspects of kernel memory management. |
|
|
|
Unless you know what you are doing, say N here. |
|
|
|
comment "Default settings for advanced configuration options are used" |
|
depends on !ADVANCED_OPTIONS |
|
|
|
config LOWMEM_SIZE_BOOL |
|
bool "Set maximum low memory" |
|
depends on ADVANCED_OPTIONS |
|
help |
|
This option allows you to set the maximum amount of memory which |
|
will be used as "low memory", that is, memory which the kernel can |
|
access directly, without having to set up a kernel virtual mapping. |
|
This can be useful in optimizing the layout of kernel virtual |
|
memory. |
|
|
|
Say N here unless you know what you are doing. |
|
|
|
config LOWMEM_SIZE |
|
hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL |
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default "0x30000000" |
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config LOWMEM_CAM_NUM_BOOL |
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bool "Set number of CAMs to use to map low memory" |
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depends on ADVANCED_OPTIONS && FSL_BOOKE |
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help |
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This option allows you to set the maximum number of CAM slots that |
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will be used to map low memory. There are a limited number of slots |
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available and even more limited number that will fit in the L1 MMU. |
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However, using more entries will allow mapping more low memory. This |
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can be useful in optimizing the layout of kernel virtual memory. |
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Say N here unless you know what you are doing. |
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config LOWMEM_CAM_NUM |
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depends on FSL_BOOKE |
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int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL |
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default 3 |
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config DYNAMIC_MEMSTART |
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bool "Enable page aligned dynamic load address for kernel" |
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depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x) |
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select NONSTATIC_KERNEL |
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help |
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This option enables the kernel to be loaded at any page aligned |
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physical address. The kernel creates a mapping from KERNELBASE to |
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the address where the kernel is loaded. The page size here implies |
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the TLB page size of the mapping for kernel on the particular platform. |
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Please refer to the init code for finding the TLB page size. |
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DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE |
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kernel image, where the only restriction is the page aligned kernel |
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load address. When this option is enabled, the compile time physical |
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address CONFIG_PHYSICAL_START is ignored. |
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This option is overridden by CONFIG_RELOCATABLE |
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config PAGE_OFFSET_BOOL |
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bool "Set custom page offset address" |
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depends on ADVANCED_OPTIONS |
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help |
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This option allows you to set the kernel virtual address at which |
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the kernel will map low memory. This can be useful in optimizing |
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the virtual memory layout of the system. |
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Say N here unless you know what you are doing. |
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config PAGE_OFFSET |
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hex "Virtual address of memory base" if PAGE_OFFSET_BOOL |
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default "0xc0000000" |
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config KERNEL_START_BOOL |
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bool "Set custom kernel base address" |
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depends on ADVANCED_OPTIONS |
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help |
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This option allows you to set the kernel virtual address at which |
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the kernel will be loaded. Normally this should match PAGE_OFFSET |
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however there are times (like kdump) that one might not want them |
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to be the same. |
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Say N here unless you know what you are doing. |
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config KERNEL_START |
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hex "Virtual address of kernel base" if KERNEL_START_BOOL |
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default PAGE_OFFSET if PAGE_OFFSET_BOOL |
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default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL |
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default "0xc0000000" |
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config PHYSICAL_START_BOOL |
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bool "Set physical address where the kernel is loaded" |
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depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE |
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help |
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This gives the physical address where the kernel is loaded. |
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Say N here unless you know what you are doing. |
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config PHYSICAL_START |
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hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL |
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default "0x02000000" if PPC_BOOK3S && CRASH_DUMP && !NONSTATIC_KERNEL |
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default "0x00000000" |
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config PHYSICAL_ALIGN |
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hex |
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default "0x04000000" if FSL_BOOKE |
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help |
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This value puts the alignment restrictions on physical address |
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where kernel is loaded and run from. Kernel is compiled for an |
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address which meets above alignment restriction. |
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config TASK_SIZE_BOOL |
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bool "Set custom user task size" |
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depends on ADVANCED_OPTIONS |
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help |
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This option allows you to set the amount of virtual address space |
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allocated to user tasks. This can be useful in optimizing the |
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virtual memory layout of the system. |
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Say N here unless you know what you are doing. |
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config TASK_SIZE |
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hex "Size of user task space" if TASK_SIZE_BOOL |
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default "0x80000000" if PPC_8xx |
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default "0xb0000000" if PPC_BOOK3S_32 |
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default "0xc0000000" |
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endmenu |
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if PPC64 |
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# This value must have zeroes in the bottom 60 bits otherwise lots will break |
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config PAGE_OFFSET |
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hex |
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default "0xc000000000000000" |
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config KERNEL_START |
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hex |
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default "0xc000000000000000" |
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config PHYSICAL_START |
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hex |
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default "0x00000000" |
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endif |
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config ARCH_RANDOM |
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def_bool n |
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config PPC_LIB_RHEAP |
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bool |
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source "arch/powerpc/kvm/Kconfig" |
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source "kernel/livepatch/Kconfig"
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