mirror of
https://github.com/torvalds/linux.git
synced 2024-11-22 20:22:09 +00:00
7fa8a8ee94
switching from a user process to a kernel thread.
- More folio conversions from Kefeng Wang, Zhang Peng and Pankaj Raghav.
- zsmalloc performance improvements from Sergey Senozhatsky.
- Yue Zhao has found and fixed some data race issues around the
alteration of memcg userspace tunables.
- VFS rationalizations from Christoph Hellwig:
- removal of most of the callers of write_one_page().
- make __filemap_get_folio()'s return value more useful
- Luis Chamberlain has changed tmpfs so it no longer requires swap
backing. Use `mount -o noswap'.
- Qi Zheng has made the slab shrinkers operate locklessly, providing
some scalability benefits.
- Keith Busch has improved dmapool's performance, making part of its
operations O(1) rather than O(n).
- Peter Xu adds the UFFD_FEATURE_WP_UNPOPULATED feature to userfaultd,
permitting userspace to wr-protect anon memory unpopulated ptes.
- Kirill Shutemov has changed MAX_ORDER's meaning to be inclusive rather
than exclusive, and has fixed a bunch of errors which were caused by its
unintuitive meaning.
- Axel Rasmussen give userfaultfd the UFFDIO_CONTINUE_MODE_WP feature,
which causes minor faults to install a write-protected pte.
- Vlastimil Babka has done some maintenance work on vma_merge():
cleanups to the kernel code and improvements to our userspace test
harness.
- Cleanups to do_fault_around() by Lorenzo Stoakes.
- Mike Rapoport has moved a lot of initialization code out of various
mm/ files and into mm/mm_init.c.
- Lorenzo Stoakes removd vmf_insert_mixed_prot(), which was added for
DRM, but DRM doesn't use it any more.
- Lorenzo has also coverted read_kcore() and vread() to use iterators
and has thereby removed the use of bounce buffers in some cases.
- Lorenzo has also contributed further cleanups of vma_merge().
- Chaitanya Prakash provides some fixes to the mmap selftesting code.
- Matthew Wilcox changes xfs and afs so they no longer take sleeping
locks in ->map_page(), a step towards RCUification of pagefaults.
- Suren Baghdasaryan has improved mmap_lock scalability by switching to
per-VMA locking.
- Frederic Weisbecker has reworked the percpu cache draining so that it
no longer causes latency glitches on cpu isolated workloads.
- Mike Rapoport cleans up and corrects the ARCH_FORCE_MAX_ORDER Kconfig
logic.
- Liu Shixin has changed zswap's initialization so we no longer waste a
chunk of memory if zswap is not being used.
- Yosry Ahmed has improved the performance of memcg statistics flushing.
- David Stevens has fixed several issues involving khugepaged,
userfaultfd and shmem.
- Christoph Hellwig has provided some cleanup work to zram's IO-related
code paths.
- David Hildenbrand has fixed up some issues in the selftest code's
testing of our pte state changing.
- Pankaj Raghav has made page_endio() unneeded and has removed it.
- Peter Xu contributed some rationalizations of the userfaultfd
selftests.
- Yosry Ahmed has fixed an issue around memcg's page recalim accounting.
- Chaitanya Prakash has fixed some arm-related issues in the
selftests/mm code.
- Longlong Xia has improved the way in which KSM handles hwpoisoned
pages.
- Peter Xu fixes a few issues with uffd-wp at fork() time.
- Stefan Roesch has changed KSM so that it may now be used on a
per-process and per-cgroup basis.
-----BEGIN PGP SIGNATURE-----
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jlLoAP0fpQBipwFxED0Us4SKQfupV6z4caXNJGPeay7Aj11/kQD/aMRC2uPfgr96
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-----END PGP SIGNATURE-----
Merge tag 'mm-stable-2023-04-27-15-30' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull MM updates from Andrew Morton:
- Nick Piggin's "shoot lazy tlbs" series, to improve the peformance of
switching from a user process to a kernel thread.
- More folio conversions from Kefeng Wang, Zhang Peng and Pankaj
Raghav.
- zsmalloc performance improvements from Sergey Senozhatsky.
- Yue Zhao has found and fixed some data race issues around the
alteration of memcg userspace tunables.
- VFS rationalizations from Christoph Hellwig:
- removal of most of the callers of write_one_page()
- make __filemap_get_folio()'s return value more useful
- Luis Chamberlain has changed tmpfs so it no longer requires swap
backing. Use `mount -o noswap'.
- Qi Zheng has made the slab shrinkers operate locklessly, providing
some scalability benefits.
- Keith Busch has improved dmapool's performance, making part of its
operations O(1) rather than O(n).
- Peter Xu adds the UFFD_FEATURE_WP_UNPOPULATED feature to userfaultd,
permitting userspace to wr-protect anon memory unpopulated ptes.
- Kirill Shutemov has changed MAX_ORDER's meaning to be inclusive
rather than exclusive, and has fixed a bunch of errors which were
caused by its unintuitive meaning.
- Axel Rasmussen give userfaultfd the UFFDIO_CONTINUE_MODE_WP feature,
which causes minor faults to install a write-protected pte.
- Vlastimil Babka has done some maintenance work on vma_merge():
cleanups to the kernel code and improvements to our userspace test
harness.
- Cleanups to do_fault_around() by Lorenzo Stoakes.
- Mike Rapoport has moved a lot of initialization code out of various
mm/ files and into mm/mm_init.c.
- Lorenzo Stoakes removd vmf_insert_mixed_prot(), which was added for
DRM, but DRM doesn't use it any more.
- Lorenzo has also coverted read_kcore() and vread() to use iterators
and has thereby removed the use of bounce buffers in some cases.
- Lorenzo has also contributed further cleanups of vma_merge().
- Chaitanya Prakash provides some fixes to the mmap selftesting code.
- Matthew Wilcox changes xfs and afs so they no longer take sleeping
locks in ->map_page(), a step towards RCUification of pagefaults.
- Suren Baghdasaryan has improved mmap_lock scalability by switching to
per-VMA locking.
- Frederic Weisbecker has reworked the percpu cache draining so that it
no longer causes latency glitches on cpu isolated workloads.
- Mike Rapoport cleans up and corrects the ARCH_FORCE_MAX_ORDER Kconfig
logic.
- Liu Shixin has changed zswap's initialization so we no longer waste a
chunk of memory if zswap is not being used.
- Yosry Ahmed has improved the performance of memcg statistics
flushing.
- David Stevens has fixed several issues involving khugepaged,
userfaultfd and shmem.
- Christoph Hellwig has provided some cleanup work to zram's IO-related
code paths.
- David Hildenbrand has fixed up some issues in the selftest code's
testing of our pte state changing.
- Pankaj Raghav has made page_endio() unneeded and has removed it.
- Peter Xu contributed some rationalizations of the userfaultfd
selftests.
- Yosry Ahmed has fixed an issue around memcg's page recalim
accounting.
- Chaitanya Prakash has fixed some arm-related issues in the
selftests/mm code.
- Longlong Xia has improved the way in which KSM handles hwpoisoned
pages.
- Peter Xu fixes a few issues with uffd-wp at fork() time.
- Stefan Roesch has changed KSM so that it may now be used on a
per-process and per-cgroup basis.
* tag 'mm-stable-2023-04-27-15-30' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (369 commits)
mm,unmap: avoid flushing TLB in batch if PTE is inaccessible
shmem: restrict noswap option to initial user namespace
mm/khugepaged: fix conflicting mods to collapse_file()
sparse: remove unnecessary 0 values from rc
mm: move 'mmap_min_addr' logic from callers into vm_unmapped_area()
hugetlb: pte_alloc_huge() to replace huge pte_alloc_map()
maple_tree: fix allocation in mas_sparse_area()
mm: do not increment pgfault stats when page fault handler retries
zsmalloc: allow only one active pool compaction context
selftests/mm: add new selftests for KSM
mm: add new KSM process and sysfs knobs
mm: add new api to enable ksm per process
mm: shrinkers: fix debugfs file permissions
mm: don't check VMA write permissions if the PTE/PMD indicates write permissions
migrate_pages_batch: fix statistics for longterm pin retry
userfaultfd: use helper function range_in_vma()
lib/show_mem.c: use for_each_populated_zone() simplify code
mm: correct arg in reclaim_pages()/reclaim_clean_pages_from_list()
fs/buffer: convert create_page_buffers to folio_create_buffers
fs/buffer: add folio_create_empty_buffers helper
...
538 lines
14 KiB
Plaintext
538 lines
14 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0
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comment "Processor Type"
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choice
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prompt "CPU family support"
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default M68KCLASSIC if MMU
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default COLDFIRE if !MMU
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help
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The Freescale (was Motorola) M68K family of processors implements
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the full 68000 processor instruction set.
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The Freescale ColdFire family of processors is a modern derivative
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of the 68000 processor family. They are mainly targeted at embedded
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applications, and are all System-On-Chip (SOC) devices, as opposed
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to stand alone CPUs. They implement a subset of the original 68000
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processor instruction set.
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If you anticipate running this kernel on a computer with a classic
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MC68xxx processor, select M68KCLASSIC.
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If you anticipate running this kernel on a computer with a ColdFire
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processor, select COLDFIRE.
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config M68KCLASSIC
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bool "Classic M68K CPU family support"
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select HAVE_ARCH_PFN_VALID
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config COLDFIRE
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bool "Coldfire CPU family support"
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select CPU_HAS_NO_BITFIELDS
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select CPU_HAS_NO_CAS
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select CPU_HAS_NO_MULDIV64
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select GENERIC_CSUM
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select GPIOLIB
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select HAVE_LEGACY_CLK
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endchoice
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if M68KCLASSIC
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config M68000
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def_bool y
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depends on !MMU
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select CPU_HAS_NO_BITFIELDS
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select CPU_HAS_NO_CAS
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select CPU_HAS_NO_MULDIV64
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select CPU_HAS_NO_UNALIGNED
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select GENERIC_CSUM
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select CPU_NO_EFFICIENT_FFS
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select HAVE_ARCH_HASH
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select LEGACY_TIMER_TICK
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help
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The Freescale (was Motorola) 68000 CPU is the first generation of
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the well known M68K family of processors. The CPU core as well as
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being available as a stand alone CPU was also used in many
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System-On-Chip devices (eg 68328, 68302, etc). It does not contain
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a paging MMU.
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config M68020
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bool "68020 support"
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depends on MMU
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select FPU
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select CPU_HAS_ADDRESS_SPACES
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help
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If you anticipate running this kernel on a computer with a MC68020
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processor, say Y. Otherwise, say N. Note that the 68020 requires a
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68851 MMU (Memory Management Unit) to run Linux/m68k, except on the
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Sun 3, which provides its own version.
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config M68030
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bool "68030 support"
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depends on MMU && !MMU_SUN3
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select FPU
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select CPU_HAS_ADDRESS_SPACES
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help
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If you anticipate running this kernel on a computer with a MC68030
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processor, say Y. Otherwise, say N. Note that a MC68EC030 will not
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work, as it does not include an MMU (Memory Management Unit).
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config M68040
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bool "68040 support"
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depends on MMU && !MMU_SUN3
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select FPU
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select CPU_HAS_ADDRESS_SPACES
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help
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If you anticipate running this kernel on a computer with a MC68LC040
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or MC68040 processor, say Y. Otherwise, say N. Note that an
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MC68EC040 will not work, as it does not include an MMU (Memory
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Management Unit).
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config M68060
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bool "68060 support"
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depends on MMU && !MMU_SUN3
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select FPU
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select CPU_HAS_ADDRESS_SPACES
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help
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If you anticipate running this kernel on a computer with a MC68060
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processor, say Y. Otherwise, say N.
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config M68328
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bool
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depends on !MMU
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select M68000
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help
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Motorola 68328 processor support.
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config M68EZ328
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bool
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depends on !MMU
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select M68000
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help
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Motorola 68EX328 processor support.
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config M68VZ328
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bool
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depends on !MMU
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select M68000
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help
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Motorola 68VZ328 processor support.
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endif # M68KCLASSIC
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if COLDFIRE
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choice
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prompt "ColdFire SoC type"
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default M520x
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help
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Select the type of ColdFire System-on-Chip (SoC) that you want
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to build for.
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config M5206
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bool "MCF5206"
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depends on !MMU
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select COLDFIRE_SW_A7
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select COLDFIRE_TIMERS
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select HAVE_MBAR
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select CPU_NO_EFFICIENT_FFS
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help
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Motorola ColdFire 5206 processor support.
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config M5206e
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bool "MCF5206e"
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depends on !MMU
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select COLDFIRE_SW_A7
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select COLDFIRE_TIMERS
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select HAVE_MBAR
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select CPU_NO_EFFICIENT_FFS
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help
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Motorola ColdFire 5206e processor support.
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config M520x
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bool "MCF520x"
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depends on !MMU
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select COLDFIRE_PIT_TIMER
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select HAVE_CACHE_SPLIT
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help
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Freescale Coldfire 5207/5208 processor support.
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config M523x
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bool "MCF523x"
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depends on !MMU
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select COLDFIRE_PIT_TIMER
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select HAVE_CACHE_SPLIT
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select HAVE_IPSBAR
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help
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Freescale Coldfire 5230/1/2/4/5 processor support
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config M5249
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bool "MCF5249"
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depends on !MMU
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select COLDFIRE_SW_A7
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select COLDFIRE_TIMERS
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select HAVE_MBAR
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select CPU_NO_EFFICIENT_FFS
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help
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Motorola ColdFire 5249 processor support.
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config M525x
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bool "MCF525x"
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depends on !MMU
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select COLDFIRE_SW_A7
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select COLDFIRE_TIMERS
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select HAVE_MBAR
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select CPU_NO_EFFICIENT_FFS
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help
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Freescale (Motorola) Coldfire 5251/5253 processor support.
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config M5271
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bool "MCF5271"
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depends on !MMU
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select COLDFIRE_PIT_TIMER
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select M527x
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select HAVE_CACHE_SPLIT
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select HAVE_IPSBAR
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help
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Freescale (Motorola) ColdFire 5270/5271 processor support.
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config M5272
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bool "MCF5272"
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depends on !MMU
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select COLDFIRE_SW_A7
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select COLDFIRE_TIMERS
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select HAVE_MBAR
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select CPU_NO_EFFICIENT_FFS
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help
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Motorola ColdFire 5272 processor support.
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config M5275
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bool "MCF5275"
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depends on !MMU
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select COLDFIRE_PIT_TIMER
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select M527x
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select HAVE_CACHE_SPLIT
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select HAVE_IPSBAR
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help
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Freescale (Motorola) ColdFire 5274/5275 processor support.
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config M528x
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bool "MCF528x"
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depends on !MMU
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select COLDFIRE_PIT_TIMER
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select HAVE_CACHE_SPLIT
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select HAVE_IPSBAR
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help
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Motorola ColdFire 5280/5282 processor support.
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config M5307
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bool "MCF5307"
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depends on !MMU
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select COLDFIRE_TIMERS
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select COLDFIRE_SW_A7
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select HAVE_CACHE_CB
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select HAVE_MBAR
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select CPU_NO_EFFICIENT_FFS
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help
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Motorola ColdFire 5307 processor support.
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config M532x
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bool "MCF532x"
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depends on !MMU
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select COLDFIRE_TIMERS
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select M53xx
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select HAVE_CACHE_CB
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help
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Freescale (Motorola) ColdFire 532x processor support.
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config M537x
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bool "MCF537x"
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depends on !MMU
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select COLDFIRE_TIMERS
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select M53xx
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select HAVE_CACHE_CB
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help
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Freescale ColdFire 537x processor support.
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config M5407
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bool "MCF5407"
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depends on !MMU
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select COLDFIRE_SW_A7
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select COLDFIRE_TIMERS
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select HAVE_CACHE_CB
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select HAVE_MBAR
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select CPU_NO_EFFICIENT_FFS
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help
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Motorola ColdFire 5407 processor support.
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config M547x
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bool "MCF547x"
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select M54xx
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select COLDFIRE_SLTIMERS
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select MMU_COLDFIRE if MMU
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select FPU if MMU
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select HAVE_CACHE_CB
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select HAVE_MBAR
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select CPU_NO_EFFICIENT_FFS
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help
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Freescale ColdFire 5470/5471/5472/5473/5474/5475 processor support.
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config M548x
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bool "MCF548x"
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select COLDFIRE_SLTIMERS
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select MMU_COLDFIRE if MMU
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select FPU if MMU
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select M54xx
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select HAVE_CACHE_CB
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select HAVE_MBAR
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select CPU_NO_EFFICIENT_FFS
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help
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Freescale ColdFire 5480/5481/5482/5483/5484/5485 processor support.
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config M5441x
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bool "MCF5441x"
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select COLDFIRE_PIT_TIMER
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select MMU_COLDFIRE if MMU
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select HAVE_CACHE_CB
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help
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Freescale Coldfire 54410/54415/54416/54417/54418 processor support.
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endchoice
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config M527x
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bool
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config M53xx
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bool
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config M54xx
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select HAVE_PCI
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bool
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config COLDFIRE_PIT_TIMER
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bool
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config COLDFIRE_TIMERS
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bool
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select LEGACY_TIMER_TICK
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config COLDFIRE_SLTIMERS
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bool
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select LEGACY_TIMER_TICK
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endif # COLDFIRE
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comment "Processor Specific Options"
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config M68KFPU_EMU
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bool "Math emulation support"
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depends on M68KCLASSIC && FPU
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help
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At some point in the future, this will cause floating-point math
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instructions to be emulated by the kernel on machines that lack a
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floating-point math coprocessor. Thrill-seekers and chronically
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sleep-deprived psychotic hacker types can say Y now, everyone else
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should probably wait a while.
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config M68KFPU_EMU_EXTRAPREC
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bool "Math emulation extra precision"
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depends on M68KFPU_EMU
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help
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The fpu uses normally a few bit more during calculations for
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correct rounding, the emulator can (often) do the same but this
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extra calculation can cost quite some time, so you can disable
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it here. The emulator will then "only" calculate with a 64 bit
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mantissa and round slightly incorrect, what is more than enough
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for normal usage.
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config M68KFPU_EMU_ONLY
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bool "Math emulation only kernel"
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depends on M68KFPU_EMU
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help
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This option prevents any floating-point instructions from being
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compiled into the kernel, thereby the kernel doesn't save any
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floating point context anymore during task switches, so this
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kernel will only be usable on machines without a floating-point
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math coprocessor. This makes the kernel a bit faster as no tests
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needs to be executed whether a floating-point instruction in the
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kernel should be executed or not.
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config ADVANCED
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bool "Advanced configuration options"
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depends on MMU
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help
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This gives you access to some advanced options for the CPU. The
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defaults should be fine for most users, but these options may make
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it possible for you to improve performance somewhat if you know what
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you are doing.
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Note that the answer to this question won't directly affect the
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kernel: saying N will just cause the configurator to skip all
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the questions about these options.
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Most users should say N to this question.
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config RMW_INSNS
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bool "Use read-modify-write instructions"
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depends on ADVANCED && !CPU_HAS_NO_CAS
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help
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This allows to use certain instructions that work with indivisible
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read-modify-write bus cycles. While this is faster than the
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workaround of disabling interrupts, it can conflict with DMA
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( = direct memory access) on many Amiga systems, and it is also said
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to destabilize other machines. It is very likely that this will
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cause serious problems on any Amiga or Atari Medusa if set. The only
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|
configuration where it should work are 68030-based Ataris, where it
|
|
apparently improves performance. But you've been warned! Unless you
|
|
really know what you are doing, say N. Try Y only if you're quite
|
|
adventurous.
|
|
|
|
config SINGLE_MEMORY_CHUNK
|
|
bool "Use one physical chunk of memory only" if ADVANCED && !SUN3
|
|
depends on MMU
|
|
default y if SUN3 || MMU_COLDFIRE
|
|
help
|
|
Ignore all but the first contiguous chunk of physical memory for VM
|
|
purposes. This will save a few bytes kernel size and may speed up
|
|
some operations.
|
|
When this option os set to N, you may want to lower "Maximum zone
|
|
order" to save memory that could be wasted for unused memory map.
|
|
Say N if not sure.
|
|
|
|
config ARCH_FORCE_MAX_ORDER
|
|
int "Order of maximal physically contiguous allocations" if ADVANCED
|
|
depends on !SINGLE_MEMORY_CHUNK
|
|
default "10"
|
|
help
|
|
The kernel page allocator limits the size of maximal physically
|
|
contiguous allocations. The limit is called MAX_ORDER and it
|
|
defines the maximal power of two of number of pages that can be
|
|
allocated as a single contiguous block. This option allows
|
|
overriding the default setting when ability to allocate very
|
|
large blocks of physically contiguous memory is required.
|
|
|
|
For systems that have holes in their physical address space this
|
|
value also defines the minimal size of the hole that allows
|
|
freeing unused memory map.
|
|
|
|
Don't change if unsure.
|
|
|
|
config 060_WRITETHROUGH
|
|
bool "Use write-through caching for 68060 supervisor accesses"
|
|
depends on ADVANCED && M68060
|
|
help
|
|
The 68060 generally uses copyback caching of recently accessed data.
|
|
Copyback caching means that memory writes will be held in an on-chip
|
|
cache and only written back to memory some time later. Saying Y
|
|
here will force supervisor (kernel) accesses to use writethrough
|
|
caching. Writethrough caching means that data is written to memory
|
|
straight away, so that cache and memory data always agree.
|
|
Writethrough caching is less efficient, but is needed for some
|
|
drivers on 68060 based systems where the 68060 bus snooping signal
|
|
is hardwired on. The 53c710 SCSI driver is known to suffer from
|
|
this problem.
|
|
|
|
config M68K_L2_CACHE
|
|
bool
|
|
depends on MAC
|
|
default y
|
|
|
|
config CPU_HAS_NO_BITFIELDS
|
|
bool
|
|
|
|
config CPU_HAS_NO_CAS
|
|
bool
|
|
|
|
config CPU_HAS_NO_MULDIV64
|
|
bool
|
|
|
|
config CPU_HAS_NO_UNALIGNED
|
|
bool
|
|
|
|
config CPU_HAS_ADDRESS_SPACES
|
|
bool
|
|
select ALTERNATE_USER_ADDRESS_SPACE
|
|
|
|
config FPU
|
|
bool
|
|
|
|
config COLDFIRE_SW_A7
|
|
bool
|
|
|
|
config HAVE_CACHE_SPLIT
|
|
bool
|
|
|
|
config HAVE_CACHE_CB
|
|
bool
|
|
|
|
config HAVE_MBAR
|
|
bool
|
|
|
|
config HAVE_IPSBAR
|
|
bool
|
|
|
|
config CLOCK_FREQ
|
|
int "Set the core clock frequency"
|
|
default "25000000" if M5206
|
|
default "54000000" if M5206e
|
|
default "166666666" if M520x
|
|
default "140000000" if M5249
|
|
default "150000000" if M527x || M523x
|
|
default "90000000" if M5307
|
|
default "50000000" if M5407
|
|
default "266000000" if M54xx
|
|
default "66666666"
|
|
depends on COLDFIRE
|
|
help
|
|
Define the CPU clock frequency in use. This is the core clock
|
|
frequency, it may or may not be the same as the external clock
|
|
crystal fitted to your board. Some processors have an internal
|
|
PLL and can have their frequency programmed at run time, others
|
|
use internal dividers. In general the kernel won't setup a PLL
|
|
if it is fitted (there are some exceptions). This value will be
|
|
specific to the exact CPU that you are using.
|
|
|
|
config OLDMASK
|
|
bool "Old mask 5307 (1H55J) silicon"
|
|
depends on M5307
|
|
help
|
|
Build support for the older revision ColdFire 5307 silicon.
|
|
Specifically this is the 1H55J mask revision.
|
|
|
|
if HAVE_CACHE_SPLIT
|
|
choice
|
|
prompt "Split Cache Configuration"
|
|
default CACHE_I
|
|
|
|
config CACHE_I
|
|
bool "Instruction"
|
|
help
|
|
Use all of the ColdFire CPU cache memory as an instruction cache.
|
|
|
|
config CACHE_D
|
|
bool "Data"
|
|
help
|
|
Use all of the ColdFire CPU cache memory as a data cache.
|
|
|
|
config CACHE_BOTH
|
|
bool "Both"
|
|
help
|
|
Split the ColdFire CPU cache, and use half as an instruction cache
|
|
and half as a data cache.
|
|
endchoice
|
|
endif # HAVE_CACHE_SPLIT
|
|
|
|
if HAVE_CACHE_CB
|
|
choice
|
|
prompt "Data cache mode"
|
|
default CACHE_WRITETHRU
|
|
|
|
config CACHE_WRITETHRU
|
|
bool "Write-through"
|
|
help
|
|
The ColdFire CPU cache is set into Write-through mode.
|
|
|
|
config CACHE_COPYBACK
|
|
bool "Copy-back"
|
|
help
|
|
The ColdFire CPU cache is set into Copy-back mode.
|
|
endchoice
|
|
endif # HAVE_CACHE_CB
|