mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 11:18:45 +07:00
71c3a888cb
- Implement user_access_begin() and friends for our platforms that support
controlling kernel access to userspace.
- Enable CONFIG_VMAP_STACK on 32-bit Book3S and 8xx.
- Some tweaks to our pseries IOMMU code to allow SVMs ("secure" virtual
machines) to use the IOMMU.
- Add support for CLOCK_{REALTIME/MONOTONIC}_COARSE to the 32-bit VDSO, and
some other improvements.
- A series to use the PCI hotplug framework to control opencapi card's so that
they can be reset and re-read after flashing a new FPGA image.
As well as other minor fixes and improvements as usual.
Thanks to:
Alastair D'Silva, Alexandre Ghiti, Alexey Kardashevskiy, Andrew Donnellan,
Aneesh Kumar K.V, Anju T Sudhakar, Bai Yingjie, Chen Zhou, Christophe Leroy,
Frederic Barrat, Greg Kurz, Jason A. Donenfeld, Joel Stanley, Jordan Niethe,
Julia Lawall, Krzysztof Kozlowski, Laurent Dufour, Laurentiu Tudor, Linus
Walleij, Michael Bringmann, Nathan Chancellor, Nicholas Piggin, Nick
Desaulniers, Oliver O'Halloran, Peter Ujfalusi, Pingfan Liu, Ram Pai, Randy
Dunlap, Russell Currey, Sam Bobroff, Sebastian Andrzej Siewior, Shawn
Anastasio, Stephen Rothwell, Steve Best, Sukadev Bhattiprolu, Thiago Jung
Bauermann, Tyrel Datwyler, Vaibhav Jain.
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Merge tag 'powerpc-5.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc updates from Michael Ellerman:
"A pretty small batch for us, and apologies for it being a bit late, I
wanted to sneak Christophe's user_access_begin() series in.
Summary:
- Implement user_access_begin() and friends for our platforms that
support controlling kernel access to userspace.
- Enable CONFIG_VMAP_STACK on 32-bit Book3S and 8xx.
- Some tweaks to our pseries IOMMU code to allow SVMs ("secure"
virtual machines) to use the IOMMU.
- Add support for CLOCK_{REALTIME/MONOTONIC}_COARSE to the 32-bit
VDSO, and some other improvements.
- A series to use the PCI hotplug framework to control opencapi
card's so that they can be reset and re-read after flashing a new
FPGA image.
As well as other minor fixes and improvements as usual.
Thanks to: Alastair D'Silva, Alexandre Ghiti, Alexey Kardashevskiy,
Andrew Donnellan, Aneesh Kumar K.V, Anju T Sudhakar, Bai Yingjie, Chen
Zhou, Christophe Leroy, Frederic Barrat, Greg Kurz, Jason A.
Donenfeld, Joel Stanley, Jordan Niethe, Julia Lawall, Krzysztof
Kozlowski, Laurent Dufour, Laurentiu Tudor, Linus Walleij, Michael
Bringmann, Nathan Chancellor, Nicholas Piggin, Nick Desaulniers,
Oliver O'Halloran, Peter Ujfalusi, Pingfan Liu, Ram Pai, Randy Dunlap,
Russell Currey, Sam Bobroff, Sebastian Andrzej Siewior, Shawn
Anastasio, Stephen Rothwell, Steve Best, Sukadev Bhattiprolu, Thiago
Jung Bauermann, Tyrel Datwyler, Vaibhav Jain"
* tag 'powerpc-5.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (131 commits)
powerpc: configs: Cleanup old Kconfig options
powerpc/configs/skiroot: Enable some more hardening options
powerpc/configs/skiroot: Disable xmon default & enable reboot on panic
powerpc/configs/skiroot: Enable security features
powerpc/configs/skiroot: Update for symbol movement only
powerpc/configs/skiroot: Drop default n CONFIG_CRYPTO_ECHAINIV
powerpc/configs/skiroot: Drop HID_LOGITECH
powerpc/configs: Drop NET_VENDOR_HP which moved to staging
powerpc/configs: NET_CADENCE became NET_VENDOR_CADENCE
powerpc/configs: Drop CONFIG_QLGE which moved to staging
powerpc: Do not consider weak unresolved symbol relocations as bad
powerpc/32s: Fix kasan_early_hash_table() for CONFIG_VMAP_STACK
powerpc: indent to improve Kconfig readability
powerpc: Provide initial documentation for PAPR hcalls
powerpc: Implement user_access_save() and user_access_restore()
powerpc: Implement user_access_begin and friends
powerpc/32s: Prepare prevent_user_access() for user_access_end()
powerpc/32s: Drop NULL addr verification
powerpc/kuap: Fix set direction in allow/prevent_user_access()
powerpc/32s: Fix bad_kuap_fault()
...
1269 lines
37 KiB
Plaintext
1269 lines
37 KiB
Plaintext
# 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 PPC64
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config NR_IRQS
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int "Number of virtual interrupt numbers"
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range 32 32768
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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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seleted 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_HAS_DEBUG_VIRTUAL
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select ARCH_HAS_DEVMEM_IS_ALLOWED
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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_KCOV
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select ARCH_HAS_HUGEPD if HUGETLB_PAGE
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select ARCH_HAS_MMIOWB if PPC64
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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_MEMBARRIER_CALLBACKS
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select ARCH_HAS_SCALED_CPUTIME if VIRT_CPU_ACCOUNTING_NATIVE && PPC_BOOK3S_64
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select ARCH_HAS_STRICT_KERNEL_RWX if ((PPC_BOOK3S_64 || PPC32) && !HIBERNATION)
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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_UACCESS_MCSAFE if PPC64
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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_SUPPORTS_ATOMIC_RMW
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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_WANT_IPC_PARSE_VERSION
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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 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
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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_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 HAVE_ARCH_AUDITSYSCALL
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select HAVE_ARCH_HUGE_VMAP if PPC_BOOK3S_64 && PPC_RADIX_MMU
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select HAVE_ARCH_JUMP_LABEL
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select HAVE_ARCH_KASAN if PPC32
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select HAVE_ARCH_KASAN_VMALLOC 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_C_RECORDMCOUNT
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select HAVE_CBPF_JIT if !PPC64
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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_STACKPROTECTOR if PPC32 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r2)
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select HAVE_CONTEXT_TRACKING if PPC64
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select HAVE_COPY_THREAD_TLS
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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 if PPC64
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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_HW_BREAKPOINT if PERF_EVENTS && (PPC_BOOK3S || PPC_8xx)
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select HAVE_IDE
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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_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_MEMBLOCK_NODE_MAP
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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_HARDLOCKUP_DETECTOR_ARCH if (PPC64 && PPC_BOOK3S)
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select HAVE_OPROFILE
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select HAVE_OPTPROBES if PPC64
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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_HARDLOCKUP_DETECTOR_PERF if PERF_EVENTS && HAVE_PERF_EVENTS_NMI && !HAVE_HARDLOCKUP_DETECTOR_ARCH
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select HAVE_PERF_REGS
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select HAVE_PERF_USER_STACK_DUMP
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select MMU_GATHER_RCU_TABLE_FREE
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select MMU_GATHER_PAGE_SIZE
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select HAVE_REGS_AND_STACK_ACCESS_API
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select HAVE_RELIABLE_STACKTRACE if PPC_BOOK3S_64 && CPU_LITTLE_ENDIAN
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select HAVE_SYSCALL_TRACEPOINTS
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select HAVE_VIRT_CPU_ACCOUNTING
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select HAVE_IRQ_TIME_ACCOUNTING
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select HAVE_RSEQ
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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 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_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 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
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default y if PPC64
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select COMPAT_BINFMT_ELF
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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 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_DEBUG_PAGEALLOC
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depends on PPC32 || PPC_BOOK3S_64
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def_bool y
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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
|
|
depends on 40x || BOOKE
|
|
default y
|
|
|
|
config PPC_ADV_DEBUG_IACS
|
|
int
|
|
depends on PPC_ADV_DEBUG_REGS
|
|
default 4 if 44x
|
|
default 2
|
|
|
|
config PPC_ADV_DEBUG_DACS
|
|
int
|
|
depends on PPC_ADV_DEBUG_REGS
|
|
default 2
|
|
|
|
config PPC_ADV_DEBUG_DVCS
|
|
int
|
|
depends on PPC_ADV_DEBUG_REGS
|
|
default 2 if 44x
|
|
default 0
|
|
|
|
config PPC_ADV_DEBUG_DAC_RANGE
|
|
bool
|
|
depends on PPC_ADV_DEBUG_REGS && 44x
|
|
default y
|
|
|
|
config PPC_DAWR
|
|
bool
|
|
|
|
config ZONE_DMA
|
|
bool
|
|
default y if PPC_BOOK3E_64
|
|
|
|
config PGTABLE_LEVELS
|
|
int
|
|
default 2 if !PPC64
|
|
default 4
|
|
|
|
source "arch/powerpc/sysdev/Kconfig"
|
|
source "arch/powerpc/platforms/Kconfig"
|
|
|
|
menu "Kernel options"
|
|
|
|
config HIGHMEM
|
|
bool "High memory support"
|
|
depends on PPC32
|
|
|
|
source "kernel/Kconfig.hz"
|
|
|
|
config HUGETLB_PAGE_SIZE_VARIABLE
|
|
bool
|
|
depends on HUGETLB_PAGE && PPC_BOOK3S_64
|
|
default y
|
|
|
|
config MATH_EMULATION
|
|
bool "Math emulation"
|
|
depends on 4xx || PPC_8xx || PPC_MPC832x || BOOKE
|
|
help
|
|
Some PowerPC chips designed for embedded applications do not have
|
|
a floating-point unit and therefore do not implement the
|
|
floating-point instructions in the PowerPC instruction set. If you
|
|
say Y here, the kernel will include code to emulate a floating-point
|
|
unit, which will allow programs that use floating-point
|
|
instructions to run.
|
|
|
|
This is also useful to emulate missing (optional) instructions
|
|
such as fsqrt on cores that do have an FPU but do not implement
|
|
them (such as Freescale BookE).
|
|
|
|
choice
|
|
prompt "Math emulation options"
|
|
default MATH_EMULATION_FULL
|
|
depends on MATH_EMULATION
|
|
|
|
config MATH_EMULATION_FULL
|
|
bool "Emulate all the floating point instructions"
|
|
help
|
|
Select this option will enable the kernel to support to emulate
|
|
all the floating point instructions. If your SoC doesn't have
|
|
a FPU, you should select this.
|
|
|
|
config MATH_EMULATION_HW_UNIMPLEMENTED
|
|
bool "Just emulate the FPU unimplemented instructions"
|
|
help
|
|
Select this if you know there does have a hardware FPU on your
|
|
SoC, but some floating point instructions are not implemented by that.
|
|
|
|
endchoice
|
|
|
|
config PPC_TRANSACTIONAL_MEM
|
|
bool "Transactional Memory support for POWERPC"
|
|
depends on PPC_BOOK3S_64
|
|
depends on SMP
|
|
select ALTIVEC
|
|
select VSX
|
|
help
|
|
Support user-mode Transactional Memory on POWERPC.
|
|
|
|
config PPC_UV
|
|
bool "Ultravisor support"
|
|
depends on KVM_BOOK3S_HV_POSSIBLE
|
|
depends on DEVICE_PRIVATE
|
|
default n
|
|
help
|
|
This option paravirtualizes the kernel to run in POWER platforms that
|
|
supports the Protected Execution Facility (PEF). On such platforms,
|
|
the ultravisor firmware runs at a privilege level above the
|
|
hypervisor.
|
|
|
|
If unsure, say "N".
|
|
|
|
config LD_HEAD_STUB_CATCH
|
|
bool "Reserve 256 bytes to cope with linker stubs in HEAD text" if EXPERT
|
|
depends on PPC64
|
|
help
|
|
Very large kernels can cause linker branch stubs to be generated by
|
|
code in head_64.S, which moves the head text sections out of their
|
|
specified location. This option can work around the problem.
|
|
|
|
If unsure, say "N".
|
|
|
|
config MPROFILE_KERNEL
|
|
depends on PPC64 && CPU_LITTLE_ENDIAN
|
|
def_bool $(success,$(srctree)/arch/powerpc/tools/gcc-check-mprofile-kernel.sh $(CC) -I$(srctree)/include -D__KERNEL__)
|
|
|
|
config HOTPLUG_CPU
|
|
bool "Support for enabling/disabling CPUs"
|
|
depends on SMP && (PPC_PSERIES || \
|
|
PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE)
|
|
help
|
|
Say Y here to be able to disable and re-enable individual
|
|
CPUs at runtime on SMP machines.
|
|
|
|
Say N if you are unsure.
|
|
|
|
config ARCH_CPU_PROBE_RELEASE
|
|
def_bool y
|
|
depends on HOTPLUG_CPU
|
|
|
|
config ARCH_ENABLE_MEMORY_HOTPLUG
|
|
def_bool y
|
|
|
|
config ARCH_ENABLE_MEMORY_HOTREMOVE
|
|
def_bool y
|
|
|
|
config PPC64_SUPPORTS_MEMORY_FAILURE
|
|
bool "Add support for memory hwpoison"
|
|
depends on PPC_BOOK3S_64
|
|
default "y" if PPC_POWERNV
|
|
select ARCH_SUPPORTS_MEMORY_FAILURE
|
|
|
|
config KEXEC
|
|
bool "kexec system call"
|
|
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
|
|
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 support"
|
|
depends on PPC64
|
|
default y if SMP && PPC_PSERIES
|
|
|
|
config NODES_SHIFT
|
|
int
|
|
default "8" if PPC64
|
|
default "4"
|
|
depends on NEED_MULTIPLE_NODES
|
|
|
|
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 SYS_SUPPORTS_HUGETLBFS
|
|
bool
|
|
|
|
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
|
|
|
|
# Some NUMA nodes have memory ranges that span
|
|
# other nodes. Even though a pfn is valid and
|
|
# between a node's start and end pfns, it may not
|
|
# reside on that node. See memmap_init_zone()
|
|
# for details.
|
|
config NODES_SPAN_OTHER_NODES
|
|
def_bool y
|
|
depends on NEED_MULTIPLE_NODES
|
|
|
|
config STDBINUTILS
|
|
bool "Using standard binutils settings"
|
|
depends on 44x
|
|
default y
|
|
help
|
|
Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
|
|
Note, that kernel will be able to run only those applications,
|
|
which had been compiled using binutils later than 2.17.50.0.3 with
|
|
'-zmax-page-size' set to 256K (the default is 64K). Or, if using
|
|
the older binutils, you can patch them with a trivial patch, which
|
|
changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
|
|
|
|
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"
|
|
depends on 44x && !STDBINUTILS
|
|
help
|
|
Make the page size 256k.
|
|
|
|
As the ELF standard only requires alignment to support page
|
|
sizes up to 64k, you will need to compile all of your user
|
|
space applications with a non-standard binutils settings
|
|
(see the STDBINUTILS description for details).
|
|
|
|
Say N unless you know what you are doing.
|
|
|
|
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 "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 ETEXT_SHIFT_BOOL
|
|
bool "Set custom etext alignment" if STRICT_KERNEL_RWX && \
|
|
(PPC_BOOK3S_32 || PPC_8xx)
|
|
depends on ADVANCED_OPTIONS
|
|
help
|
|
This option allows you to set the kernel end of text 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 ETEXT_SHIFT
|
|
int "_etext shift" if ETEXT_SHIFT_BOOL
|
|
range 17 28 if STRICT_KERNEL_RWX && PPC_BOOK3S_32
|
|
range 19 23 if STRICT_KERNEL_RWX && PPC_8xx
|
|
default 17 if STRICT_KERNEL_RWX && PPC_BOOK3S_32
|
|
default 19 if STRICT_KERNEL_RWX && PPC_8xx
|
|
default PPC_PAGE_SHIFT
|
|
help
|
|
On Book3S 32 (603+), IBATs are used to map kernel text.
|
|
Smaller is the alignment, greater is the number of necessary IBATs.
|
|
|
|
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.
|
|
|
|
config DATA_SHIFT_BOOL
|
|
bool "Set custom data alignment" if STRICT_KERNEL_RWX && \
|
|
(PPC_BOOK3S_32 || PPC_8xx)
|
|
depends on ADVANCED_OPTIONS
|
|
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 && PPC_BOOK3S_32
|
|
range 19 23 if STRICT_KERNEL_RWX && PPC_8xx
|
|
default 22 if STRICT_KERNEL_RWX && PPC_BOOK3S_32
|
|
default 23 if STRICT_KERNEL_RWX && 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.
|
|
|
|
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"
|
|
depends on PPC_BOOK3S_64 && PPC_64K_PAGES
|
|
help
|
|
This option adds support for a system call to allow user programs
|
|
to set access permissions (read/write, readonly, or no access)
|
|
on the 4k subpages of each 64k page.
|
|
|
|
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_BOOL
|
|
bool "Default bootloader kernel arguments"
|
|
|
|
config CMDLINE
|
|
string "Initial kernel command string" if CMDLINE_BOOL
|
|
default "console=ttyS0,9600 console=tty0 root=/dev/sda2" if CMDLINE_BOOL
|
|
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 SECCOMP
|
|
bool "Enable seccomp to safely compute untrusted bytecode"
|
|
depends on PROC_FS
|
|
default y
|
|
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 /proc/<pid>/seccomp, it cannot be disabled
|
|
and the task is only allowed to execute a few safe syscalls
|
|
defined by each seccomp mode.
|
|
|
|
If unsure, say Y. Only embedded should say N here.
|
|
|
|
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
|
|
depends on IMA_ARCH_POLICY
|
|
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.
|
|
|
|
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
|
|
default "0x30000000"
|
|
|
|
config LOWMEM_CAM_NUM_BOOL
|
|
bool "Set number of CAMs to use to map low memory"
|
|
depends on ADVANCED_OPTIONS && FSL_BOOKE
|
|
help
|
|
This option allows you to set the maximum number of CAM slots that
|
|
will be used to map low memory. There are a limited number of slots
|
|
available and even more limited number that will fit in the L1 MMU.
|
|
However, using more entries will allow mapping more low memory. This
|
|
can be useful in optimizing the layout of kernel virtual memory.
|
|
|
|
Say N here unless you know what you are doing.
|
|
|
|
config LOWMEM_CAM_NUM
|
|
depends on FSL_BOOKE
|
|
int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
|
|
default 3
|
|
|
|
config DYNAMIC_MEMSTART
|
|
bool "Enable page aligned dynamic load address for kernel"
|
|
depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
|
|
select NONSTATIC_KERNEL
|
|
help
|
|
This option enables the kernel to be loaded at any page aligned
|
|
physical address. The kernel creates a mapping from KERNELBASE to
|
|
the address where the kernel is loaded. The page size here implies
|
|
the TLB page size of the mapping for kernel on the particular platform.
|
|
Please refer to the init code for finding the TLB page size.
|
|
|
|
DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
|
|
kernel image, where the only restriction is the page aligned kernel
|
|
load address. When this option is enabled, the compile time physical
|
|
address CONFIG_PHYSICAL_START is ignored.
|
|
|
|
This option is overridden by CONFIG_RELOCATABLE
|
|
|
|
config PAGE_OFFSET_BOOL
|
|
bool "Set custom page offset address"
|
|
depends on ADVANCED_OPTIONS
|
|
help
|
|
This option allows you to set the kernel virtual address at which
|
|
the kernel will map low memory. This can be useful in optimizing
|
|
the virtual memory layout of the system.
|
|
|
|
Say N here unless you know what you are doing.
|
|
|
|
config PAGE_OFFSET
|
|
hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
|
|
default "0xc0000000"
|
|
|
|
config KERNEL_START_BOOL
|
|
bool "Set custom kernel base address"
|
|
depends on ADVANCED_OPTIONS
|
|
help
|
|
This option allows you to set the kernel virtual address at which
|
|
the kernel will be loaded. Normally this should match PAGE_OFFSET
|
|
however there are times (like kdump) that one might not want them
|
|
to be the same.
|
|
|
|
Say N here unless you know what you are doing.
|
|
|
|
config KERNEL_START
|
|
hex "Virtual address of kernel base" if KERNEL_START_BOOL
|
|
default PAGE_OFFSET if PAGE_OFFSET_BOOL
|
|
default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
|
|
default "0xc0000000"
|
|
|
|
config PHYSICAL_START_BOOL
|
|
bool "Set physical address where the kernel is loaded"
|
|
depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
|
|
help
|
|
This gives the physical address where the kernel is loaded.
|
|
|
|
Say N here unless you know what you are doing.
|
|
|
|
config PHYSICAL_START
|
|
hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
|
|
default "0x02000000" if PPC_BOOK3S && CRASH_DUMP && !NONSTATIC_KERNEL
|
|
default "0x00000000"
|
|
|
|
config PHYSICAL_ALIGN
|
|
hex
|
|
default "0x04000000" if FSL_BOOKE
|
|
help
|
|
This value puts the alignment restrictions on physical address
|
|
where kernel is loaded and run from. Kernel is compiled for an
|
|
address which meets above alignment restriction.
|
|
|
|
config TASK_SIZE_BOOL
|
|
bool "Set custom user task size"
|
|
depends on ADVANCED_OPTIONS
|
|
help
|
|
This option allows you to set the amount of virtual address space
|
|
allocated to user tasks. This can be useful in optimizing the
|
|
virtual memory layout of the system.
|
|
|
|
Say N here unless you know what you are doing.
|
|
|
|
config TASK_SIZE
|
|
hex "Size of user task space" if TASK_SIZE_BOOL
|
|
default "0x80000000" if PPC_8xx
|
|
default "0xc0000000"
|
|
|
|
config PIN_TLB
|
|
bool "Pinned Kernel TLBs (860 ONLY)"
|
|
depends on ADVANCED_OPTIONS && PPC_8xx && \
|
|
!DEBUG_PAGEALLOC && !STRICT_KERNEL_RWX
|
|
|
|
config PIN_TLB_DATA
|
|
bool "Pinned TLB for DATA"
|
|
depends on PIN_TLB
|
|
default y
|
|
|
|
config PIN_TLB_IMMR
|
|
bool "Pinned TLB for IMMR"
|
|
depends on PIN_TLB || PPC_EARLY_DEBUG_CPM
|
|
default y
|
|
|
|
config PIN_TLB_TEXT
|
|
bool "Pinned TLB for TEXT"
|
|
depends on PIN_TLB
|
|
default y
|
|
endmenu
|
|
|
|
if PPC64
|
|
# This value must have zeroes in the bottom 60 bits otherwise lots will break
|
|
config PAGE_OFFSET
|
|
hex
|
|
default "0xc000000000000000"
|
|
config KERNEL_START
|
|
hex
|
|
default "0xc000000000000000"
|
|
config PHYSICAL_START
|
|
hex
|
|
default "0x00000000"
|
|
endif
|
|
|
|
config ARCH_RANDOM
|
|
def_bool n
|
|
|
|
config PPC_LIB_RHEAP
|
|
bool
|
|
|
|
source "arch/powerpc/kvm/Kconfig"
|
|
|
|
source "kernel/livepatch/Kconfig"
|