pmap: move the smp_targeted_tlb_shutdown pointer stuff to amd64 pmap.h

Fixes: bec000c9c1ef409989685bb03ff0532907befb4aESC
Sponsored by: The FreeBSD Foundation

amd64: add a func pointer to tlb shootdown function

Make the tlb shootdown function as a pointer. By default, it still
points to the system function smp_targeted_tlb_shootdown(). It allows
other imp

amd64: add a func pointer to tlb shootdown function

Make the tlb shootdown function as a pointer. By default, it still
points to the system function smp_targeted_tlb_shootdown(). It allows
other implemenations to overwrite in the future.

Reviewed by: kib
Tested by: whu
Authored-by: Souradeep Chakrabarti <schakrabarti@microsoft.com>
Co-Authored-by: Erni Sri Satya Vennela <ernis@microsoft.com>
MFC after: 1 week
Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D45174

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pmap: Convert boolean_t to bool.

Reviewed by: kib (older version)
Differential Revision: https://reviews.freebsd.org/D39921

sys: Remove ancient SCCS tags.

Remove ancient SCCS tags from the tree, automated scripting, with two
minor fixup to keep things compiling. All the common forms in the tree
were removed with a perl s

sys: Remove ancient SCCS tags.

Remove ancient SCCS tags from the tree, automated scripting, with two
minor fixup to keep things compiling. All the common forms in the tree
were removed with a perl script.

Sponsored by: Netflix

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add pmap_active_cpus()

For amd64, i386, arm, and riscv, i.e. all architectures except arm64,
the custom implementation is provided since we maintain the bitmask of
active CPUs anyway.

Arm64 uses so

add pmap_active_cpus()

For amd64, i386, arm, and riscv, i.e. all architectures except arm64,
the custom implementation is provided since we maintain the bitmask of
active CPUs anyway.

Arm64 uses somewhat naive iteration over CPUs and match current vmspace'
pmap with the argument. It is not guaranteed that vmspace->pmap is the
same as the active pmap, but the inaccuracy should be toleratable.

Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D32360

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sys: Remove $FreeBSD$: two-line .h pattern

Remove /^\s*\*\n \*\s+\$FreeBSD\$$\n/

Add pmap_enter(9) PMAP_ENTER_LARGEPAGE flag and implement it on amd64.

The flag requests entry of non-managed superpage mapping of size
pagesizes[psind] into the page table.

Pmap supports fake wiri

Add pmap_enter(9) PMAP_ENTER_LARGEPAGE flag and implement it on amd64.

The flag requests entry of non-managed superpage mapping of size
pagesizes[psind] into the page table.

Pmap supports fake wiring of the largepage mappings. Only attributes
of the largepage mapping can be changed by calling pmap_enter(9) over
existing mapping, physical address of the page must be unchanged.

Reviewed by: markj
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D24652

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Remove page locking from pmap_mincore().

After r352110 the page lock no longer protects a page's identity, so
there is no purpose in locking the page in pmap_mincore(). Instead,
if vm.mincore_mappe

Remove page locking from pmap_mincore().

After r352110 the page lock no longer protects a page's identity, so
there is no purpose in locking the page in pmap_mincore(). Instead,
if vm.mincore_mapped is set to the non-default value of 0, re-lookup
the page after acquiring its object lock, which holds the page's
identity stable.

The change removes the last callers of vm_page_pa_tryrelock(), so
remove it.

Reviewed by: kib
Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D21823

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MFHead @r350386

Sponsored by: The FreeBSD Foundation

correct pmap_ts_referenced return type

pmap_ts_referenced returns a count, not a boolean, and is supposed to
have int as the return type not boolean_t.

This worked previously because boolean_t is a

correct pmap_ts_referenced return type

pmap_ts_referenced returns a count, not a boolean, and is supposed to
have int as the return type not boolean_t.

This worked previously because boolean_t is an int typedef.

Discussed with: kib
MFC after: 1 week
Sponsored by: The FreeBSD Foundation

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MFH @ r337607, in preparation for boarding

Merge ^/head r336870 through r337285, and resolve conflicts.

Add pmap_is_valid_memattr(9).

Discussed with: alc
Sponsored by: The FreeBSD Foundation, Mellanox Technologies
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D15583

Merge ^/head r325999 through r326131.

sys: further adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 3-Clause license.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for

sys: further adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 3-Clause license.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

Special thanks to Wind River for providing access to "The Duke of
Highlander" tool: an older (2014) run over FreeBSD tree was useful as a
starting point.

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MFhead@r320180

Merge ^/head r319973 through 321382.

Add support for pmap_enter(..., psind=1) to the amd64 pmap. In other words,
add support for explicitly requesting that pmap_enter() create a 2MB page
mapping. (Essentially, this feature allows the

Add support for pmap_enter(..., psind=1) to the amd64 pmap. In other words,
add support for explicitly requesting that pmap_enter() create a 2MB page
mapping. (Essentially, this feature allows the machine-independent layer to
create superpage mappings preemptively, and not wait for automatic promotion
to occur.)

Export pmap_ps_enabled() to the machine-independent layer.

Add a flag to pmap_pv_insert_pde() that specifies whether it should fail or
reclaim a PV entry when one is not available.

Refactor pmap_enter_pde() into two functions, one by the same name, that is
a general-purpose function for creating PDE PG_PS mappings, and another,
pmap_enter_2mpage(), that is used to prefault 2MB read- and/or execute-only
mappings for execve(2), mmap(2), and shmat(2).

Submitted by: Yufeng Zhou <yz70@rice.edu> (an earlier version)
Reviewed by: kib, markj
Tested by: pho
MFC after: 10 days
Differential Revision: https://reviews.freebsd.org/D11556

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Merge ^/head r314420 through r314481.

Renumber copyright clause 4

Renumber cluase 4 to 3, per what everybody else did when BSD granted
them permission to remove clause 3. My insistance on keeping the same
numbering for legal reasons is

Renumber copyright clause 4

Renumber cluase 4 to 3, per what everybody else did when BSD granted
them permission to remove clause 3. My insistance on keeping the same
numbering for legal reasons is too pedantic, so give up on that point.

Submitted by: Jan Schaumann <jschauma@stevens.edu>
Pull Request: https://github.com/freebsd/freebsd/pull/96

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Merge ^/head r305623 through r305686.

Various changes to pmap_ts_referenced()

Move PMAP_TS_REFERENCED_MAX out of the various pmap implementations and
into vm/pmap.h, and describe what its purpose is. Eliminate the archaic
"XXX" comment

Various changes to pmap_ts_referenced()

Move PMAP_TS_REFERENCED_MAX out of the various pmap implementations and
into vm/pmap.h, and describe what its purpose is. Eliminate the archaic
"XXX" comment about its value. I don't believe that its exact value, e.g.,
5 versus 6, matters.

Update the arm64 and riscv pmap implementations of pmap_ts_referenced()
to opportunistically update the page's dirty field.

On amd64, use the PDE value already cached in a local variable rather than
dereferencing a pointer again and again.

Reviewed by: kib, markj
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D7836

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Merge ^/head r305361 through r305389.

Remove support for idle page zeroing.

Idle page zeroing has been disabled by default on all architectures since
r170816 and has some bugs that make it seemingly unusable. Specifically,
the idle-prio

Remove support for idle page zeroing.

Idle page zeroing has been disabled by default on all architectures since
r170816 and has some bugs that make it seemingly unusable. Specifically,
the idle-priority pagezero thread exacerbates contention for the free page
lock, and yields the CPU without releasing it in non-preemptive kernels. The
pagezero thread also does not behave correctly when superpage reservations
are enabled: its target is a function of v_free_count, which includes
reserved-but-free pages, but it is only able to zero pages belonging to the
physical memory allocator.

Reviewed by: alc, imp, kib
Differential Revision: https://reviews.freebsd.org/D7714

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Merge from head

Sponsored by: Gandi.net