7ae04ba36b
ARCH_DMA_MINALIGN was defined as 16 - this is too small - it may be possible that two unrelated 16-byte allocations share a cache line. If one of these allocations is written using DMA and the other is written using cached write, the value that was written with DMA may be corrupted. This commit changes ARCH_DMA_MINALIGN to be 128 on PA20 and 32 on PA1.1 - that's the largest possible cache line size. As different parisc microarchitectures have different cache line size, we define arch_slab_minalign(), cache_line_size() and dma_get_cache_alignment() so that the kernel may tune slab cache parameters dynamically, based on the detected cache line size. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Cc: stable@vger.kernel.org Signed-off-by: Helge Deller <deller@gmx.de>
388 lines
9.8 KiB
Plaintext
388 lines
9.8 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0
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config PARISC
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def_bool y
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select ALTERNATE_USER_ADDRESS_SPACE
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select ARCH_32BIT_OFF_T if !64BIT
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select ARCH_MIGHT_HAVE_PC_PARPORT
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select HAVE_FUNCTION_TRACER
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select HAVE_FUNCTION_GRAPH_TRACER
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select HAVE_SYSCALL_TRACEPOINTS
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select ARCH_WANT_FRAME_POINTERS
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select ARCH_HAS_CPU_CACHE_ALIASING
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select ARCH_HAS_DMA_ALLOC if PA11
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select ARCH_HAS_ELF_RANDOMIZE
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select ARCH_HAS_STRICT_KERNEL_RWX
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select ARCH_HAS_STRICT_MODULE_RWX
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select ARCH_HAS_UBSAN
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select ARCH_HAS_PTE_SPECIAL
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select ARCH_NO_SG_CHAIN
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select ARCH_SPLIT_ARG64 if !64BIT
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select ARCH_SUPPORTS_HUGETLBFS if PA20
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select ARCH_SUPPORTS_MEMORY_FAILURE
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select ARCH_STACKWALK
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select ARCH_HAS_CACHE_LINE_SIZE
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select ARCH_HAS_DEBUG_VM_PGTABLE
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select HAVE_RELIABLE_STACKTRACE
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select DMA_OPS
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select RTC_CLASS
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select RTC_DRV_GENERIC
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select INIT_ALL_POSSIBLE
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select BUG
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select HAVE_KERNEL_UNCOMPRESSED
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select HAVE_PCI
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select HAVE_PERF_EVENTS
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select HAVE_KERNEL_BZIP2
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select HAVE_KERNEL_GZIP
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select HAVE_KERNEL_LZ4
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select HAVE_KERNEL_LZMA
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select HAVE_KERNEL_LZO
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select HAVE_KERNEL_XZ
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select GENERIC_ATOMIC64 if !64BIT
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select GENERIC_IRQ_PROBE
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select GENERIC_PCI_IOMAP
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select GENERIC_IOREMAP
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select ARCH_HAVE_NMI_SAFE_CMPXCHG
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select GENERIC_SMP_IDLE_THREAD
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select GENERIC_ARCH_TOPOLOGY if SMP
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select GENERIC_CPU_DEVICES if !SMP
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select GENERIC_LIB_DEVMEM_IS_ALLOWED
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select SYSCTL_ARCH_UNALIGN_ALLOW
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select SYSCTL_ARCH_UNALIGN_NO_WARN
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select SYSCTL_EXCEPTION_TRACE
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select HAVE_MOD_ARCH_SPECIFIC
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select MODULES_USE_ELF_RELA
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select CLONE_BACKWARDS
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select TTY # Needed for pdc_cons.c
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select HAS_IOPORT if PCI || EISA
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select HAVE_DEBUG_STACKOVERFLOW
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select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT
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select HAVE_ARCH_MMAP_RND_COMPAT_BITS if COMPAT
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select HAVE_ARCH_MMAP_RND_BITS
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select HAVE_ARCH_AUDITSYSCALL
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select HAVE_ARCH_HASH
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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_KFENCE
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select HAVE_ARCH_SECCOMP_FILTER
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select HAVE_ARCH_TRACEHOOK
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select HAVE_EBPF_JIT
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select ARCH_WANT_DEFAULT_BPF_JIT
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select HAVE_REGS_AND_STACK_ACCESS_API
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select HOTPLUG_CORE_SYNC_DEAD if HOTPLUG_CPU
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select GENERIC_SCHED_CLOCK
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select GENERIC_IRQ_MIGRATION if SMP
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select HAVE_UNSTABLE_SCHED_CLOCK if SMP
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select LEGACY_TIMER_TICK
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select CPU_NO_EFFICIENT_FFS
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select THREAD_INFO_IN_TASK
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select NEED_DMA_MAP_STATE
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select NEED_SG_DMA_LENGTH
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select HAVE_ARCH_KGDB
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select HAVE_KPROBES
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select HAVE_KRETPROBES
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select HAVE_DYNAMIC_FTRACE if $(cc-option,-fpatchable-function-entry=1,1)
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select HAVE_FTRACE_MCOUNT_RECORD if HAVE_DYNAMIC_FTRACE
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select FTRACE_MCOUNT_USE_PATCHABLE_FUNCTION_ENTRY if DYNAMIC_FTRACE
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select HAVE_KPROBES_ON_FTRACE
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select HAVE_DYNAMIC_FTRACE_WITH_REGS
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select HAVE_SOFTIRQ_ON_OWN_STACK if IRQSTACKS
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select TRACE_IRQFLAGS_SUPPORT
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select HAVE_FUNCTION_DESCRIPTORS if 64BIT
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select PCI_MSI_ARCH_FALLBACKS if PCI_MSI
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help
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The PA-RISC microprocessor is designed by Hewlett-Packard and used
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in many of their workstations & servers (HP9000 700 and 800 series,
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and later HP3000 series). The PA-RISC Linux project home page is
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at <https://parisc.wiki.kernel.org>.
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config CPU_BIG_ENDIAN
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def_bool y
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config MMU
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def_bool y
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config STACK_GROWSUP
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def_bool 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 ARCH_HAS_ILOG2_U32
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bool
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default n
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config ARCH_HAS_ILOG2_U64
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bool
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default n
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config GENERIC_BUG
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def_bool y
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depends on BUG
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select GENERIC_BUG_RELATIVE_POINTERS if 64BIT
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config GENERIC_BUG_RELATIVE_POINTERS
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bool
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config GENERIC_HWEIGHT
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bool
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default y
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config GENERIC_CALIBRATE_DELAY
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bool
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default y
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config TIME_LOW_RES
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bool
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depends on SMP
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default y
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config ARCH_MMAP_RND_BITS_MIN
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default 18 if 64BIT
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default 8
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config ARCH_MMAP_RND_COMPAT_BITS_MIN
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default 8
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config ARCH_MMAP_RND_BITS_MAX
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default 18 if 64BIT
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default 13
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config ARCH_MMAP_RND_COMPAT_BITS_MAX
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default 13
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# unless you want to implement ACPI on PA-RISC ... ;-)
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config PM
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bool
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config STACKTRACE_SUPPORT
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def_bool y
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config LOCKDEP_SUPPORT
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bool
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default y
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config ISA_DMA_API
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bool
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config ARCH_MAY_HAVE_PC_FDC
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bool
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depends on BROKEN
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default y
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config PGTABLE_LEVELS
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int
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default 3 if 64BIT && PARISC_PAGE_SIZE_4KB
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default 2
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menu "Processor type and features"
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choice
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prompt "Processor type"
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default PA7000 if "$(ARCH)" = "parisc"
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config PA7000
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bool "PA7000/PA7100" if "$(ARCH)" = "parisc"
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help
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This is the processor type of your CPU. This information is
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used for optimizing purposes. In order to compile a kernel
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that can run on all 32-bit PA CPUs (albeit not optimally fast),
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you can specify "PA7000" here.
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Specifying "PA8000" here will allow you to select a 64-bit kernel
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which is required on some machines.
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config PA7100LC
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bool "PA7100LC" if "$(ARCH)" = "parisc"
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help
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Select this option for the PCX-L processor, as used in the
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712, 715/64, 715/80, 715/100, 715/100XC, 725/100, 743, 748,
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D200, D210, D300, D310 and E-class
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config PA7200
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bool "PA7200" if "$(ARCH)" = "parisc"
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help
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Select this option for the PCX-T' processor, as used in the
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C100, C110, J100, J110, J210XC, D250, D260, D350, D360,
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K100, K200, K210, K220, K400, K410 and K420
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config PA7300LC
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bool "PA7300LC" if "$(ARCH)" = "parisc"
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help
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Select this option for the PCX-L2 processor, as used in the
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744, A180, B132L, B160L, B180L, C132L, C160L, C180L,
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D220, D230, D320 and D330.
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config PA8X00
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bool "PA8000 and up"
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help
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Select this option for PCX-U to PCX-W2 processors.
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endchoice
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# Define implied options from the CPU selection here
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config PA20
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def_bool y
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depends on PA8X00
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config PA11
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def_bool y
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depends on PA7000 || PA7100LC || PA7200 || PA7300LC
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select ARCH_HAS_SYNC_DMA_FOR_CPU
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select ARCH_HAS_SYNC_DMA_FOR_DEVICE
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config PREFETCH
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def_bool y
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depends on PA8X00 || PA7200
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config PARISC_HUGE_KERNEL
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def_bool y if !MODULES || UBSAN || FTRACE || COMPILE_TEST
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config MLONGCALLS
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bool "Enable the -mlong-calls compiler option for big kernels" if !PARISC_HUGE_KERNEL
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depends on PA8X00
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default PARISC_HUGE_KERNEL
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help
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If you configure the kernel to include many drivers built-in instead
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as modules, the kernel executable may become too big, so that the
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linker will not be able to resolve some long branches and fails to link
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your vmlinux kernel. In that case enabling this option will help you
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to overcome this limit by using the -mlong-calls compiler option.
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Usually you want to say N here, unless you e.g. want to build
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a kernel which includes all necessary drivers built-in and which can
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be used for TFTP booting without the need to have an initrd ramdisk.
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Enabling this option will probably slow down your kernel.
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config 64BIT
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bool "64-bit kernel" if "$(ARCH)" = "parisc"
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depends on PA8X00
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default "$(ARCH)" = "parisc64"
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help
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Enable this if you want to support 64bit kernel on PA-RISC platform.
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At the moment, only people willing to use more than 2GB of RAM,
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or having a 64bit-only capable PA-RISC machine should say Y here.
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Since there is no 64bit userland on PA-RISC, there is no point to
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enable this option otherwise. The 64bit kernel is significantly bigger
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and slower than the 32bit one.
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choice
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prompt "Kernel page size"
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default PARISC_PAGE_SIZE_4KB
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config PARISC_PAGE_SIZE_4KB
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bool "4KB"
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select HAVE_PAGE_SIZE_4KB
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help
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This lets you select the page size of the kernel. For best
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performance, a page size of 16KB is recommended. For best
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compatibility with 32bit applications, a page size of 4KB should be
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selected (the vast majority of 32bit binaries work perfectly fine
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with a larger page size).
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4KB For best 32bit compatibility
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16KB For best performance
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64KB For best performance, might give more overhead.
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If you don't know what to do, choose 4KB.
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config PARISC_PAGE_SIZE_16KB
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bool "16KB"
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select HAVE_PAGE_SIZE_16KB
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depends on PA8X00 && BROKEN && !KFENCE
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config PARISC_PAGE_SIZE_64KB
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bool "64KB"
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select HAVE_PAGE_SIZE_64KB
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depends on PA8X00 && BROKEN && !KFENCE
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endchoice
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config SMP
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bool "Symmetric multi-processing support"
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help
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This enables support for systems with more than one CPU. If you have
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a system with only one CPU, say N. If you have a system with more
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than one CPU, say Y.
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If you say N here, the kernel will run on uni- and multiprocessor
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machines, but will use only one CPU of a multiprocessor machine.
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On a uniprocessor machine, the kernel will run faster if you say N.
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See also <file:Documentation/admin-guide/lockup-watchdogs.rst> and the SMP-HOWTO
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available at <https://www.tldp.org/docs.html#howto>.
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If you don't know what to do here, say N.
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config SCHED_MC
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bool "Multi-core scheduler support"
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depends on GENERIC_ARCH_TOPOLOGY && PA8X00
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help
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Multi-core scheduler support improves the CPU scheduler's decision
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making when dealing with multi-core CPU chips at a cost of slightly
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increased overhead in some places. If unsure say N here.
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config IRQSTACKS
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bool "Use separate kernel stacks when processing interrupts"
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default y
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help
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If you say Y here the kernel will use separate kernel stacks
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for handling hard and soft interrupts. This can help avoid
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overflowing the process kernel stacks.
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config HOTPLUG_CPU
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bool
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default y if SMP
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config ARCH_SELECT_MEMORY_MODEL
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def_bool y
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depends on 64BIT
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config ARCH_SPARSEMEM_ENABLE
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def_bool y
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depends on 64BIT
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config ARCH_FLATMEM_ENABLE
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def_bool y
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config ARCH_SPARSEMEM_DEFAULT
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def_bool y
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depends on ARCH_SPARSEMEM_ENABLE
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source "kernel/Kconfig.hz"
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config COMPAT
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def_bool y
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depends on 64BIT
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config AUDIT_ARCH
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def_bool y
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config NR_CPUS
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int "Maximum number of CPUs (2-32)"
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range 2 32
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depends on SMP
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default "8" if 64BIT
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default "16"
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endmenu
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config ARCH_SUPPORTS_KEXEC
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def_bool y
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config ARCH_SUPPORTS_KEXEC_FILE
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def_bool y
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config ARCH_SELECTS_KEXEC_FILE
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def_bool y
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depends on KEXEC_FILE
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select KEXEC_ELF
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source "drivers/parisc/Kconfig"
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