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![Linus Torvalds](/assets/img/avatar_default.png)
Al noted that the semantics of the ia64 perfmon mmap() is really wrong, and can cause serious VM problems. Before we look at whether it needs to be fixed, let's see if anybody even uses it, and mark it broken. It may be that we can just remove the code entirely. Reported-by: Alexander Viro <viro@zeniv.linux.org.uk> Acked-by: Matthew Wilcox <willy@infradead.org> Acked-by: Stephane Eranian <eranian@google.com> Cc: Tony Luck <tony.luck@intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
600 lines
15 KiB
Text
600 lines
15 KiB
Text
# SPDX-License-Identifier: GPL-2.0
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config PGTABLE_LEVELS
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int "Page Table Levels" if !IA64_PAGE_SIZE_64KB
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range 3 4 if !IA64_PAGE_SIZE_64KB
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default 3
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source "init/Kconfig"
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source "kernel/Kconfig.freezer"
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menu "Processor type and features"
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config IA64
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bool
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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 PCI if (!IA64_HP_SIM)
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select ACPI if (!IA64_HP_SIM)
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select ACPI_SYSTEM_POWER_STATES_SUPPORT if ACPI
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select ARCH_MIGHT_HAVE_ACPI_PDC if ACPI
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select HAVE_UNSTABLE_SCHED_CLOCK
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select HAVE_EXIT_THREAD
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select HAVE_IDE
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select HAVE_OPROFILE
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select HAVE_KPROBES
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select HAVE_KRETPROBES
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select HAVE_FTRACE_MCOUNT_RECORD
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select HAVE_DYNAMIC_FTRACE if (!ITANIUM)
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select HAVE_FUNCTION_TRACER
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select TTY
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select HAVE_ARCH_TRACEHOOK
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select HAVE_MEMBLOCK
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select HAVE_MEMBLOCK_NODE_MAP
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select HAVE_VIRT_CPU_ACCOUNTING
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select ARCH_HAS_DMA_MARK_CLEAN
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select ARCH_HAS_SG_CHAIN
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select VIRT_TO_BUS
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select ARCH_DISCARD_MEMBLOCK
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select GENERIC_IRQ_PROBE
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select GENERIC_PENDING_IRQ if SMP
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select GENERIC_IRQ_SHOW
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select GENERIC_IRQ_LEGACY
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select ARCH_HAVE_NMI_SAFE_CMPXCHG
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select GENERIC_IOMAP
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select GENERIC_SMP_IDLE_THREAD
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select ARCH_TASK_STRUCT_ON_STACK
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select ARCH_TASK_STRUCT_ALLOCATOR
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select ARCH_THREAD_STACK_ALLOCATOR
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select ARCH_CLOCKSOURCE_DATA
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select GENERIC_TIME_VSYSCALL
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select SYSCTL_ARCH_UNALIGN_NO_WARN
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select HAVE_MOD_ARCH_SPECIFIC
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select MODULES_USE_ELF_RELA
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select ARCH_USE_CMPXCHG_LOCKREF
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select HAVE_ARCH_AUDITSYSCALL
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select NEED_DMA_MAP_STATE
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select NEED_SG_DMA_LENGTH
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default y
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help
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The Itanium Processor Family is Intel's 64-bit successor to
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the 32-bit X86 line. The IA-64 Linux project has a home
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page at <http://www.linuxia64.org/> and a mailing list at
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<linux-ia64@vger.kernel.org>.
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config 64BIT
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bool
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select ATA_NONSTANDARD if ATA
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default y
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config ZONE_DMA32
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def_bool y
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depends on !IA64_SGI_SN2
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config QUICKLIST
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bool
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default y
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config MMU
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bool
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default y
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config STACKTRACE_SUPPORT
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def_bool y
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config GENERIC_LOCKBREAK
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def_bool n
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config RWSEM_XCHGADD_ALGORITHM
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bool
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default y
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config HUGETLB_PAGE_SIZE_VARIABLE
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bool
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depends on HUGETLB_PAGE
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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 HAVE_SETUP_PER_CPU_AREA
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def_bool y
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config DMI
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bool
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default y
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select DMI_SCAN_MACHINE_NON_EFI_FALLBACK
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config EFI
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bool
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select UCS2_STRING
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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 IA64_UNCACHED_ALLOCATOR
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bool
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select GENERIC_ALLOCATOR
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config ARCH_USES_PG_UNCACHED
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def_bool y
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depends on IA64_UNCACHED_ALLOCATOR
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config AUDIT_ARCH
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bool
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default y
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choice
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prompt "System type"
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default IA64_GENERIC
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config IA64_GENERIC
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bool "generic"
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select NUMA
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select ACPI_NUMA
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select SWIOTLB
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select PCI_MSI
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help
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This selects the system type of your hardware. A "generic" kernel
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will run on any supported IA-64 system. However, if you configure
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a kernel for your specific system, it will be faster and smaller.
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generic For any supported IA-64 system
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DIG-compliant For DIG ("Developer's Interface Guide") compliant systems
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DIG+Intel+IOMMU For DIG systems with Intel IOMMU
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HP-zx1/sx1000 For HP systems
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HP-zx1/sx1000+swiotlb For HP systems with (broken) DMA-constrained devices.
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SGI-SN2 For SGI Altix systems
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SGI-UV For SGI UV systems
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Ski-simulator For the HP simulator <http://www.hpl.hp.com/research/linux/ski/>
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If you don't know what to do, choose "generic".
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config IA64_DIG
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bool "DIG-compliant"
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select SWIOTLB
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config IA64_DIG_VTD
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bool "DIG+Intel+IOMMU"
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select INTEL_IOMMU
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select PCI_MSI
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config IA64_HP_ZX1
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bool "HP-zx1/sx1000"
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help
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Build a kernel that runs on HP zx1 and sx1000 systems. This adds
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support for the HP I/O MMU.
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config IA64_HP_ZX1_SWIOTLB
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bool "HP-zx1/sx1000 with software I/O TLB"
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select SWIOTLB
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help
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Build a kernel that runs on HP zx1 and sx1000 systems even when they
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have broken PCI devices which cannot DMA to full 32 bits. Apart
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from support for the HP I/O MMU, this includes support for the software
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I/O TLB, which allows supporting the broken devices at the expense of
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wasting some kernel memory (about 2MB by default).
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config IA64_SGI_SN2
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bool "SGI-SN2"
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select NUMA
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select ACPI_NUMA
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help
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Selecting this option will optimize the kernel for use on sn2 based
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systems, but the resulting kernel binary will not run on other
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types of ia64 systems. If you have an SGI Altix system, it's safe
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to select this option. If in doubt, select ia64 generic support
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instead.
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config IA64_SGI_UV
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bool "SGI-UV"
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select NUMA
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select ACPI_NUMA
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select SWIOTLB
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help
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Selecting this option will optimize the kernel for use on UV based
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systems, but the resulting kernel binary will not run on other
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types of ia64 systems. If you have an SGI UV system, it's safe
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to select this option. If in doubt, select ia64 generic support
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instead.
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config IA64_HP_SIM
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bool "Ski-simulator"
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select SWIOTLB
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depends on !PM
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endchoice
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choice
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prompt "Processor type"
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default ITANIUM
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config ITANIUM
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bool "Itanium"
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help
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Select your IA-64 processor type. The default is Itanium.
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This choice is safe for all IA-64 systems, but may not perform
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optimally on systems with, say, Itanium 2 or newer processors.
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config MCKINLEY
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bool "Itanium 2"
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help
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Select this to configure for an Itanium 2 (McKinley) processor.
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endchoice
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choice
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prompt "Kernel page size"
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default IA64_PAGE_SIZE_16KB
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config IA64_PAGE_SIZE_4KB
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bool "4KB"
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help
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This lets you select the page size of the kernel. For best IA-64
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performance, a page size of 8KB or 16KB is recommended. For best
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IA-32 compatibility, a page size of 4KB should be selected (the vast
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majority of IA-32 binaries work perfectly fine with a larger page
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size). For Itanium 2 or newer systems, a page size of 64KB can also
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be selected.
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4KB For best IA-32 compatibility
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8KB For best IA-64 performance
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16KB For best IA-64 performance
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64KB Requires Itanium 2 or newer processor.
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If you don't know what to do, choose 16KB.
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config IA64_PAGE_SIZE_8KB
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bool "8KB"
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config IA64_PAGE_SIZE_16KB
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bool "16KB"
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config IA64_PAGE_SIZE_64KB
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depends on !ITANIUM
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bool "64KB"
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endchoice
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if IA64_HP_SIM
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config HZ
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default 32
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endif
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if !IA64_HP_SIM
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source kernel/Kconfig.hz
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endif
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config IA64_BRL_EMU
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bool
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depends on ITANIUM
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default y
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# align cache-sensitive data to 128 bytes
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config IA64_L1_CACHE_SHIFT
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int
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default "7" if MCKINLEY
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default "6" if ITANIUM
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config IA64_CYCLONE
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bool "Cyclone (EXA) Time Source support"
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help
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Say Y here to enable support for IBM EXA Cyclone time source.
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If you're unsure, answer N.
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config IOSAPIC
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bool
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depends on !IA64_HP_SIM
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default y
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config FORCE_MAX_ZONEORDER
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int "MAX_ORDER (11 - 17)" if !HUGETLB_PAGE
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range 11 17 if !HUGETLB_PAGE
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default "17" if HUGETLB_PAGE
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default "11"
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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 single and multiprocessor
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systems, but will use only one CPU of a multiprocessor system. If
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you say Y here, the kernel will run on many, but not all,
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single processor systems. On a single processor system, the kernel
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will run faster if you say N here.
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See also the SMP-HOWTO available at
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<http://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 NR_CPUS
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int "Maximum number of CPUs (2-4096)"
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range 2 4096
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depends on SMP
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default "4096"
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help
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You should set this to the number of CPUs in your system, but
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keep in mind that a kernel compiled for, e.g., 2 CPUs will boot but
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only use 2 CPUs on a >2 CPU system. Setting this to a value larger
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than 64 will cause the use of a CPU mask array, causing a small
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performance hit.
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config HOTPLUG_CPU
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bool "Support for hot-pluggable CPUs"
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depends on SMP
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default n
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---help---
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Say Y here to experiment with turning CPUs off and on. CPUs
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can be controlled through /sys/devices/system/cpu/cpu#.
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Say N if you want to disable CPU hotplug.
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config ARCH_ENABLE_MEMORY_HOTPLUG
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def_bool y
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config ARCH_ENABLE_MEMORY_HOTREMOVE
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def_bool y
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config SCHED_SMT
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bool "SMT scheduler support"
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depends on SMP
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help
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Improves the CPU scheduler's decision making when dealing with
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Intel IA64 chips with MultiThreading at a cost of slightly increased
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overhead in some places. If unsure say N here.
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config PERMIT_BSP_REMOVE
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bool "Support removal of Bootstrap Processor"
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depends on HOTPLUG_CPU
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default n
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---help---
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Say Y here if your platform SAL will support removal of BSP with HOTPLUG_CPU
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support.
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config FORCE_CPEI_RETARGET
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bool "Force assumption that CPEI can be re-targeted"
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depends on PERMIT_BSP_REMOVE
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default n
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---help---
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Say Y if you need to force the assumption that CPEI can be re-targeted to
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any cpu in the system. This hint is available via ACPI 3.0 specifications.
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Tiger4 systems are capable of re-directing CPEI to any CPU other than BSP.
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This option it useful to enable this feature on older BIOS's as well.
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You can also enable this by using boot command line option force_cpei=1.
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source "kernel/Kconfig.preempt"
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source "mm/Kconfig"
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config ARCH_SELECT_MEMORY_MODEL
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def_bool y
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config ARCH_DISCONTIGMEM_ENABLE
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def_bool y
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help
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Say Y to support efficient handling of discontiguous physical memory,
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for architectures which are either NUMA (Non-Uniform Memory Access)
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or have huge holes in the physical address space for other reasons.
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See <file:Documentation/vm/numa.rst> for more.
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config ARCH_FLATMEM_ENABLE
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def_bool y
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config ARCH_SPARSEMEM_ENABLE
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def_bool y
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depends on ARCH_DISCONTIGMEM_ENABLE
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select SPARSEMEM_VMEMMAP_ENABLE
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config ARCH_DISCONTIGMEM_DEFAULT
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def_bool y if (IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB)
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depends on ARCH_DISCONTIGMEM_ENABLE
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config NUMA
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bool "NUMA support"
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depends on !IA64_HP_SIM && !FLATMEM
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default y if IA64_SGI_SN2
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select ACPI_NUMA if ACPI
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help
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Say Y to compile the kernel to support NUMA (Non-Uniform Memory
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Access). This option is for configuring high-end multiprocessor
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server systems. If in doubt, say N.
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config NODES_SHIFT
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int "Max num nodes shift(3-10)"
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range 3 10
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default "10"
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depends on NEED_MULTIPLE_NODES
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help
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This option specifies the maximum number of nodes in your SSI system.
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MAX_NUMNODES will be 2^(This value).
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If in doubt, use the default.
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# VIRTUAL_MEM_MAP and FLAT_NODE_MEM_MAP are functionally equivalent.
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# VIRTUAL_MEM_MAP has been retained for historical reasons.
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config VIRTUAL_MEM_MAP
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bool "Virtual mem map"
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depends on !SPARSEMEM
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default y if !IA64_HP_SIM
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help
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Say Y to compile the kernel with support for a virtual mem map.
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This code also only takes effect if a memory hole of greater than
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1 Gb is found during boot. You must turn this option on if you
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require the DISCONTIGMEM option for your machine. If you are
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unsure, say Y.
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config HOLES_IN_ZONE
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bool
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default y if VIRTUAL_MEM_MAP
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config HAVE_ARCH_EARLY_PFN_TO_NID
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def_bool NUMA && SPARSEMEM
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config HAVE_ARCH_NODEDATA_EXTENSION
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def_bool y
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depends on NUMA
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config USE_PERCPU_NUMA_NODE_ID
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def_bool y
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depends on NUMA
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config HAVE_MEMORYLESS_NODES
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def_bool NUMA
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config ARCH_PROC_KCORE_TEXT
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def_bool y
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depends on PROC_KCORE
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config IA64_MCA_RECOVERY
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tristate "MCA recovery from errors other than TLB."
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config PERFMON
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bool "Performance monitor support"
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depends on BROKEN
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help
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Selects whether support for the IA-64 performance monitor hardware
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is included in the kernel. This makes some kernel data-structures a
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little bigger and slows down execution a bit, but it is generally
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a good idea to turn this on. If you're unsure, say Y.
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config IA64_PALINFO
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tristate "/proc/pal support"
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help
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If you say Y here, you are able to get PAL (Processor Abstraction
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Layer) information in /proc/pal. This contains useful information
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about the processors in your systems, such as cache and TLB sizes
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and the PAL firmware version in use.
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To use this option, you have to ensure that the "/proc file system
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support" (CONFIG_PROC_FS) is enabled, too.
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config IA64_MC_ERR_INJECT
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tristate "MC error injection support"
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help
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Adds support for MC error injection. If enabled, the kernel
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will provide a sysfs interface for user applications to
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call MC error injection PAL procedures to inject various errors.
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This is a useful tool for MCA testing.
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If you're unsure, do not select this option.
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config SGI_SN
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def_bool y if (IA64_SGI_SN2 || IA64_GENERIC)
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config IA64_ESI
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bool "ESI (Extensible SAL Interface) support"
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help
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If you say Y here, support is built into the kernel to
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make ESI calls. ESI calls are used to support vendor-specific
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firmware extensions, such as the ability to inject memory-errors
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for test-purposes. If you're unsure, say N.
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config IA64_HP_AML_NFW
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bool "Support ACPI AML calls to native firmware"
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help
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This driver installs a global ACPI Operation Region handler for
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region 0xA1. AML methods can use this OpRegion to call arbitrary
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native firmware functions. The driver installs the OpRegion
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handler if there is an HPQ5001 device or if the user supplies
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the "force" module parameter, e.g., with the "aml_nfw.force"
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kernel command line option.
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source "drivers/sn/Kconfig"
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config KEXEC
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bool "kexec system call"
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depends on !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
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select KEXEC_CORE
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help
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kexec is a system call that implements the ability to shutdown your
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current kernel, and to start another kernel. It is like a reboot
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but it is independent of the system firmware. And like a reboot
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you can start any kernel with it, not just Linux.
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The name comes from the similarity to the exec system call.
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It is an ongoing process to be certain the hardware in a machine
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is properly shutdown, so do not be surprised if this code does not
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initially work for you. As of this writing the exact hardware
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interface is strongly in flux, so no good recommendation can be
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made.
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config CRASH_DUMP
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bool "kernel crash dumps"
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|
depends on IA64_MCA_RECOVERY && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
|
|
help
|
|
Generate crash dump after being started by kexec.
|
|
|
|
source "drivers/firmware/Kconfig"
|
|
|
|
source "fs/Kconfig.binfmt"
|
|
|
|
endmenu
|
|
|
|
menu "Power management and ACPI options"
|
|
|
|
source "kernel/power/Kconfig"
|
|
|
|
source "drivers/acpi/Kconfig"
|
|
|
|
if PM
|
|
menu "CPU Frequency scaling"
|
|
source "drivers/cpufreq/Kconfig"
|
|
endmenu
|
|
endif
|
|
|
|
endmenu
|
|
|
|
if !IA64_HP_SIM
|
|
|
|
menu "Bus options (PCI, PCMCIA)"
|
|
|
|
config PCI
|
|
bool "PCI support"
|
|
help
|
|
Real IA-64 machines all have PCI/PCI-X/PCI Express busses. Say Y
|
|
here unless you are using a simulator without PCI support.
|
|
|
|
config PCI_DOMAINS
|
|
def_bool PCI
|
|
|
|
config PCI_SYSCALL
|
|
def_bool PCI
|
|
|
|
source "drivers/pci/Kconfig"
|
|
|
|
source "drivers/pcmcia/Kconfig"
|
|
|
|
endmenu
|
|
|
|
endif
|
|
|
|
source "net/Kconfig"
|
|
|
|
source "drivers/Kconfig"
|
|
|
|
source "arch/ia64/hp/sim/Kconfig"
|
|
|
|
config MSPEC
|
|
tristate "Memory special operations driver"
|
|
depends on IA64
|
|
select IA64_UNCACHED_ALLOCATOR
|
|
help
|
|
If you have an ia64 and you want to enable memory special
|
|
operations support (formerly known as fetchop), say Y here,
|
|
otherwise say N.
|
|
|
|
source "fs/Kconfig"
|
|
|
|
source "arch/ia64/Kconfig.debug"
|
|
|
|
source "security/Kconfig"
|
|
|
|
source "crypto/Kconfig"
|
|
|
|
source "lib/Kconfig"
|