mirror of
https://github.com/torvalds/linux.git
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7ecd19cfdf
Patch series "mm: percpu: Cleanup percpu first chunk function".
When supporting page mapping percpu first chunk allocator on arm64, we
found there are lots of duplicated codes in percpu embed/page first chunk
allocator. This patchset is aimed to cleanup them and should no function
change.
The currently supported status about 'embed' and 'page' in Archs shows
below,
embed: NEED_PER_CPU_PAGE_FIRST_CHUNK
page: NEED_PER_CPU_EMBED_FIRST_CHUNK
embed page
------------------------
arm64 Y Y
mips Y N
powerpc Y Y
riscv Y N
sparc Y Y
x86 Y Y
------------------------
There are two interfaces about percpu first chunk allocator,
extern int __init pcpu_embed_first_chunk(size_t reserved_size, size_t dyn_size,
size_t atom_size,
pcpu_fc_cpu_distance_fn_t cpu_distance_fn,
- pcpu_fc_alloc_fn_t alloc_fn,
- pcpu_fc_free_fn_t free_fn);
+ pcpu_fc_cpu_to_node_fn_t cpu_to_nd_fn);
extern int __init pcpu_page_first_chunk(size_t reserved_size,
- pcpu_fc_alloc_fn_t alloc_fn,
- pcpu_fc_free_fn_t free_fn,
- pcpu_fc_populate_pte_fn_t populate_pte_fn);
+ pcpu_fc_cpu_to_node_fn_t cpu_to_nd_fn);
The pcpu_fc_alloc_fn_t/pcpu_fc_free_fn_t is killed, we provide generic
pcpu_fc_alloc() and pcpu_fc_free() function, which are called in the
pcpu_embed/page_first_chunk().
1) For pcpu_embed_first_chunk(), pcpu_fc_cpu_to_node_fn_t is needed to be
provided when archs supported NUMA.
2) For pcpu_page_first_chunk(), the pcpu_fc_populate_pte_fn_t is killed too,
a generic pcpu_populate_pte() which marked '__weak' is provided, if you
need a different function to populate pte on the arch(like x86), please
provide its own implementation.
[1] https://github.com/kevin78/linux.git percpu-cleanup
This patch (of 4):
The HAVE_SETUP_PER_CPU_AREA/NEED_PER_CPU_EMBED_FIRST_CHUNK/
NEED_PER_CPU_PAGE_FIRST_CHUNK/USE_PERCPU_NUMA_NODE_ID configs, which have
duplicate definitions on platforms that subscribe it.
Move them into mm, drop these redundant definitions and instead just
select it on applicable platforms.
Link: https://lkml.kernel.org/r/20211216112359.103822-1-wangkefeng.wang@huawei.com
Link: https://lkml.kernel.org/r/20211216112359.103822-2-wangkefeng.wang@huawei.com
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com> [arm64]
Cc: Will Deacon <will@kernel.org>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Dennis Zhou <dennis@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
410 lines
11 KiB
Plaintext
410 lines
11 KiB
Plaintext
# 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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menu "Processor type and features"
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config IA64
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bool
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select ARCH_HAS_DMA_MARK_CLEAN
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select ARCH_HAS_STRNCPY_FROM_USER
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select ARCH_HAS_STRNLEN_USER
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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 ACPI
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select ACPI_NUMA if NUMA
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select ARCH_ENABLE_MEMORY_HOTPLUG
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select ARCH_ENABLE_MEMORY_HOTREMOVE
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select ARCH_SUPPORTS_ACPI
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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 FORCE_PCI
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select PCI_DOMAINS if PCI
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select PCI_MSI
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select PCI_SYSCALL if PCI
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select HAVE_ASM_MODVERSIONS
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select HAVE_UNSTABLE_SCHED_CLOCK
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select HAVE_EXIT_THREAD
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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 HAVE_SETUP_PER_CPU_AREA
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select TTY
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select HAVE_ARCH_TRACEHOOK
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select HAVE_VIRT_CPU_ACCOUNTING
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select HUGETLB_PAGE_SIZE_VARIABLE if HUGETLB_PAGE
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select VIRT_TO_BUS
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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 LEGACY_TIMER_TICK
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select SWIOTLB
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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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select NUMA if !FLATMEM
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select PCI_MSI_ARCH_FALLBACKS if PCI_MSI
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select SET_FS
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select ZONE_DMA32
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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 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 GENERIC_CALIBRATE_DELAY
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bool
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default 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 "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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source "kernel/Kconfig.hz"
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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_SGI_UV
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bool "SGI-UV support"
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help
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Selecting this option will add specific support for running on SGI
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UV based systems. If you have an SGI UV system or are building a
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distro kernel, select this option.
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config IA64_HP_SBA_IOMMU
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bool "HP SBA IOMMU support"
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select DMA_OPS
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default y
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help
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Say Y here to add support for the SBA IOMMU found on HP zx1 and
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sx1000 systems. If you're unsure, answer Y.
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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 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 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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config ARCH_SELECT_MEMORY_MODEL
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def_bool y
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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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select SPARSEMEM_VMEMMAP_ENABLE
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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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config NUMA
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bool "NUMA support"
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depends on !FLATMEM
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select SMP
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select USE_PERCPU_NUMA_NODE_ID
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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 NUMA
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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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config HAVE_ARCH_NODEDATA_EXTENSION
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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 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 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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config KEXEC
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bool "kexec system call"
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depends on !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 && (!SMP || HOTPLUG_CPU)
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help
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Generate crash dump after being started by kexec.
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endmenu
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menu "Power management and ACPI options"
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source "kernel/power/Kconfig"
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source "drivers/acpi/Kconfig"
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if PM
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menu "CPU Frequency scaling"
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source "drivers/cpufreq/Kconfig"
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endmenu
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endif
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endmenu
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config MSPEC
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tristate "Memory special operations driver"
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depends on IA64
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select IA64_UNCACHED_ALLOCATOR
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help
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If you have an ia64 and you want to enable memory special
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operations support (formerly known as fetchop), say Y here,
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otherwise say N.
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