CVS log for src/sys/dev/mm.c

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mm.c: g/c duplicate mm_ioctl declaration

Sync with HEAD

appease the gcc7 fallthru checker.

Sync with HEAD, resolve a few conflicts

As discussed in tech-kern:

- make sysctl kern.expose_address tri-state:
	0: no access
	1: access to processes with open /dev/kmem
	2: access to everyone
  defaults:
	0: KASLR kernels
	1: non-KASLR kernels

- improve efficiency by calling get_expose_address() per sysctl, not per
  process.

- don't expose addresses for linux procfs

- welcome to 8.99.27, changes to fill_*proc ABI

update from HEAD

Sync with HEAD

Sync with HEAD

/dev/mem cannot lseek over 0x80000000 on 32bit architectures.

Sync with HEAD

Add mm_md_page_color hook and use to support better page coloring.

Sync with HEAD

add /dev/full

Rebase to HEAD as of a few days ago.

Rebase.

Add d_discard to all struct cdevsw instances I could find.

All have been set to "nodiscard"; some should get a real implementation.

sync with head.

for a reference, the tree before this commit was tagged
as yamt-pagecache-tag8.

this commit was splitted into small chunks to avoid
a limitation of cvs.  ("Protocol error: too many arguments")

sync with head

Change (mostly mechanically) every cdevsw/bdevsw I can find to use
designated initializers.

I have not built every extant kernel so I have probably broken at
least one build; however I've also found and fixed some wrong
cdevsw/bdevsw entries so even if so I think we come out ahead.

resync with head

sync with head

Fix __HAVE_MM_MD_CACHE_ALIASING case to use UVM_KMF_COLORMATCH so that
uvm returns a page of the correct color.

sync with head

sync to -current.

mm_init: re-enable zero page protection.

Catchup with rmind-uvmplock merge.

Explicitly initialise vaddr_t and let dead store elimination remove it
later.

Welcome to 5.99.53!  Merge rmind-uvmplock branch:

- Reorganize locking in UVM and provide extra serialisation for pmap(9).
  New lock order: [vmpage-owner-lock] -> pmap-lock.

- Simplify locking in some pmap(9) modules by removing P->V locking.

- Use lock object on vmobjlock (and thus vnode_t::v_interlock) to share
  the locks amongst UVM objects where necessary (tmpfs, layerfs, unionfs).

- Rewrite and optimise x86 TLB shootdown code, make it simpler and cleaner.
  Add TLBSTATS option for x86 to collect statistics about TLB shootdowns.

- Unify /dev/mem et al in MI code and provide required locking (removes
  kernel-lock on some ports).  Also, avoid cache-aliasing issues.

Thanks to Andrew Doran and Joerg Sonnenberger, as their initial patches
formed the core changes of this branch.

- Use MIN() instead of min().
- Use __read_mostly and __cacheline_aligned.

- mm_init: disable pmap_protect() call on zero-page for now (x86 pmap issue).
- Run evcnt_init() a little bit earlier, before uvm_init().

Add code, dev_mem_getva() and dev_mem_relva(), to deal with cache-aliasing
issues by allocating an appropriate KVA from physical address, according to
the colour.  Used by architectures, which have such requirement.  For now,
enable only for MIPS, others will follow.  This renames previously invented
mm_md_getva() and mm_md_relva(), since we do this in MI way, instead of MD.
Architectures just need to define __HAVE_MM_MD_CACHE_ALIASING as indicator.

Reviewed by Matt Thomas.

- Drop vmmap and its reserved page on hp700, sparc and x86.
- mm_init: use UVM_KMF_WAITVA when allocating a VA.

- Invent mm_md_getva() and mm_md_relva() routines, provided by MD and
  indicated with __HAVE_MM_MD_PREFER_VA.  It will be used to deal with
  cache aliasing issues and thus fix little MIPS, ARM and friends.

- Convert dev_mem_readwrite() to use unmanaged mappings.  Fix a missed
  offset addition in a case of direct map.  Sprinkle various comments in
  the memory device driver.

- Add missing direct map handling on hp700 and vax.  Make checks across
  m68k ports more consistent, reduce the diffs.  Fix kernacc check miss
  on news68k.  Minor off-by-one fix for alpha.  Add MEMC_PHYS_BASE for
  mmap() case check on acorn26.  Misc clean-up.

Unify /dev/{mem,kmem,zero,null} implementations in MI code.  Based on patch
from Joerg Sonnenberger, proposed on tech-kern@, in February 2008.

Work and depression still in progress.

sync with head.

Sync with HEAD.

Sync with HEAD.

Sync with HEAD.

Need to include sys/termios.h here too.

return ENOTTY instead of EOPNOTSUPP for ioctl(/dev/null, TIOCGETA)
from Andy Shevchenko

Sync with HEAD.

sync with head.

sync with head.

Remove clause 3 and 4 from TNF licenses

sync with head.

Sync with HEAD.

Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

sync with head.

sync with head.

Sync with head.

__unused removal on arguments; approved by core.

sync with head

- sprinkle __unused on function decls.
- fix a couple of unused bugs
- no more -Wno-unused for i386

sync with head.

merge ktrace-lwp.

Fix the sync with head I botched.

Sync with HEAD.

Sync with HEAD

don't enumerate individual minor number cases in mmioctl(), handle all
as single 'default' case
adresses part of port-arm/23581 by Richard Earnshaw

cleanup & uniform descriptor owner handling:
* introduce fsetown(), fgetown(), fownsignal() - this sets/retrieves/signals
  the owner of descriptor, according to appropriate sematics
  of TIOCSPGRP/FIOSETOWN/SIOCSPGRP/TIOCGPGRP/FIOGETOWN/SIOCGPGRP ioctl; use
  these routines instead of custom code where appropriate
* make every place handling TIOCSPGRP/TIOCGPGRP handle also FIOSETOWN/FIOGETOWN
  properly, and remove the translation of FIO[SG]OWN to TIOC[SG]PGRP
  in sys_ioctl() & sys_fcntl()
* also remove the socket-specific hack in sys_ioctl()/sys_fcntl() and
  pass the ioctls down to soo_ioctl() as any other ioctl

change discussed on tech-kern@

Apply the aborted ktrace-lwp changes to a specific branch.  This is just for
others to review, I'm concerned that patch fuziness may have resulted in some
errant code being generated but I'll look at that later by comparing the diff
from the base to the branch with the file I attempt to apply to it.  This will,
at the very least, put the changes in a better context for others to review
them and attempt to tinker with removing passing of 'struct lwp' through
the kernel.

Back out the lwp/ktrace changes. They contained a lot of colateral damage,
and need to be examined and discussed more.

Pass lwp pointers throughtout the kernel, as required, so that the lwpid can
be inserted into ktrace records.  The general change has been to replace
"struct proc *" with "struct lwp *" in various function prototypes, pass
the lwp through and use l_proc to get the process pointer when needed.

Bump the kernel rev up to 1.6V

sync kqueue with -current; this includes merge of gehenna-devsw branch,
merge of i386 MP branch, and part of autoconf rototil work

Catch up to -current.

Merge the gehenna-devsw branch into the trunk.

This merge changes the device switch tables from static array to
dynamically generated by config(8).

- All device switches is defined as a constant structure in device drivers.

- The new grammer ``device-major'' is introduced to ``files''.

	device-major <prefix> char <num> [block <num>] [<rules>]

- All device major numbers must be listed up in port dependent majors.<arch>
  by using this grammer.

- Added the new naming convention.
  The name of the device switch must be <prefix>_[bc]devsw for auto-generation
  of device switch tables.

- The backward compatibility of loading block/character device
  switch by LKM framework is broken. This is necessary to convert
  from block/character device major to device name in runtime and vice versa.

- The restriction to assign device major by LKM is completely removed.
  We don't need to reserve LKM entries for dynamic loading of device switch.

- In compile time, device major numbers list is packed into the kernel and
  the LKM framework will refer it to assign device major number dynamically.

Add a prototype.

Catch up with -current.

Catch up to -current.

file mm.c was added on branch kqueue on 2002-03-16 16:00:48 +0000

file mm.c was added on branch nathanw_sa on 2002-02-28 04:13:11 +0000

Start of mi /dev/{mem,kmem,zero,null} driver. We add an ioctl entry, because
we don't want to throw an error when FIONBIO is requested. We also allow
FIOASYNC clear.