uvm_aio_aiodone_pages(): only call uvm_pageout_done() if work was done for
the page daemon.

(ad)

ossaudio: Avoid giving userland uninitialized memory. Noticed by maxv.

The uninitalized field in this structure is `fillers`, an array that
simply reserves space for later changes in OSSv4, which this version
of the OSS compat layer (specifically for Linux applications) makes no
effort to implement.

(nia)

PR port-arm/55186: tests crash arm pmap

pmap_clearbit(): take execbits into account in the fastpath.

(ad)

- Fix uneven performance with "bursty" vmem arenas.  Adjust locking so that
  the mutex is acquired and released only once in the happy path.  Align
  tags to cachelines.  Size the hash table according to the maximum count of
  boundary tags over the interval just gone, not the instantaneous count,
  and decay that maximum value by 50%+1 after each rehash.  Round up to the
  next power of two to eliminate divisions.  Do the rehash check unlocked.

- Hash bucket size is sizeof(vmem_hashlist), not size of a pointer to same.

(ad)

SLIST_INIT() xbdi->xbdi_va_free just for clarity

(jdolecek)

Improve TSD behavior

Optimistically check whether the key has been used by this thread
already and avoid locking in that case. This avoids the atomic operation
in the hot path. When the value is set to non-NULL for the first time,
put the entry on the to-be-freed list and keep it their until
destruction or thread exit. Setting the key to NULL and back is common
enough and updating the list is more expensive than the extra check on
the final round.

(joerg)

Reinit TSD mutex in the child to avoid issues with former waiters

(joerg)

good grief..

(ad)

Set LW_SINTR earlier so it doesn't pose a problem for doing interruptable
waits with turnstiles (not currently done).

(ad)

- Only increment nprocs when we're creating a new process, not just
  when allocating a PID.
- Per above, proc_free_pid() no longer decrements nprocs.  It's now done
  in proc_free() right after proc_free_pid().
- Ensure nprocs is accessed using atomics everywhere.

(thorpej)

Move xen_ipi.c to XENPV only.
Make sure we don't need to send events to remote CPUs (outside of IPIs)

(bouyer)

make privpgops const

(jdolecek)

Add per-PIC callbacks for interrupt_get_devname(), interrupt_get_assigned()
and interrupt_get_count(). Implement Xen-specific callbacks for
PIC_XEN and use the x86 one for others.
In event_set_handler(), call intr_allocate_io_intrsource() so that
events appears in interrupt list (intrctl list).

(bouyer)

Enable the code to clean the extattr blocks

(christos)

Give UVMHIST_LOG() the 6 args it requires.  Unbreak builds.

(kre)

fstab.5: note the first field is a placeholder for some FSes

Addresses PR misc/52607. (I suppose something about this could also be
added to the man pages for the mount commands for each applicable file
system, but I think this should suffice.)

(gutteridge)

Add missing BUS_DMA_COHERENT hints

(jmcneill)

change interface for xen_shm_map() so that caller always supplies the VA,
it now fails only if the Xen hypercall fails, in which case the failure
is final

change xbdback to pre-allocate KVA on xbdback attach (and free on detach),
so it has always KVA to map the request pages

remove no longer needed KVA allocation failure handling

(jdolecek)

Define TESTSDIR even when not amd64 so the Atffile will be
installed in the correct location.

(kre)

Match Linux's criterion for byte-swapping on big-endian CPUs.

(riastradh)

Include dev/sysmon/sysmonvar.h for sysmon_pswitch.

Somehow only triggered by the compat build (which shouldn't have been
enabled!)

(maya)

Turn off compat drm.
XXX issue security advisory

(maya)

For drm drivers and on monitor hotplug, report a 'display-cycle' hotkey click

If powerd is running, it will invoke the script
/etc/powerd/actions/display-cycle

(maya)

In iic_acquire_bus(), unlock the bus lock if the back-end returns an
error from its acquire-bus function.

(thorpej)

fix calculation of remaining bytes in xbd_diskstart_submit() for second
part of exactly I/O over 32KB when the remaining size was less than 1 page,
loop just finished without filling the last segment

triggered by anita run by Manuel

(jdolecek)

New Greek National Numbering Plan, according to the EETT decision published
in the Greek Government Gazette 127 B/8.2.2001

(is)

- add locking
- wrap wapbl around truncating, ffs_extwrite does it on its own.

(christos)

Initial 11n support for urtwn.

Compile tested only... More to come.

(nat)

ossaudio: Implement SNDCTL_DSP_(SET|GET)TRIGGER.

(nia)

Destroy anonymous device vnodes on reboot once the last file system
got unmounted and the mount list is empty.

PR kern/54969: Disk cache is no longer flushed on shutdown

(hannken)

Take some pressure from vdrain lock:

- Use cv_signal() instead of cv_broadcast(), there is only one waiter.
- No need to signal if number of vnodes doesn't increase.
- Use kpause(1) instead of yield().

(hannken)

Add tests for USER_LDT.

(maxv)

Add a struct pic * member to struct intrhand.
This will be used for interrupt_get_count()
For Xen remplace pic_type with a pointer to the pic, and add a pointer
to intrhand, in struct pintrhand
Make event_set_handler return the pointer to struct intrhand.
Don't allocate a fake intrhand in xen_intr_establish_xname(), use the
one returned by event_set_handler().

(bouyer)

ossaudio: Make SNDCTL_DSP_[GET|SET][PLAY|RECORD]VOL closer to OSSv4

Problems in the previous code include returning values in the 0-255
range NetBSD uses instead of the 0-100 range OSSv4 expects, using
AUDIO_GETBUFINFO (which doesn't even return the mixer bits), and
not encoding channels as specified: "level=(left)|(right << 8)".

In reality, setting the gain in this way (through /dev/audio rather
than /dev/mixer) doesn't seem to work properly, and the mixer-set
value seems to be retained.

However, these changes at least ensure that the return values are
correct and the balance is set correctly.

I've only found one application using this API (audio/audacious), and
OSSv4 support in it is currently disabled precisely because it breaks
when it attempts to set the track volume using it.

(nia)

revert previous, it actually doesn't help so no reason to diverge from xen

(jdolecek)

Fix UVMHIST_LOG compile on 32bit platforms

(skrll)

Fix typo in UVMHIST_LOG

(skrll)

Fix round_blocksize not to return 0.

(isaki)

Make round_blocksize satisfy all of
- restrictions that existed before merging isaki-audio2 branch.
- better support for 6 channels hardware.
- audio layer's requirement.
This may help PR kern/54474.

(isaki)

Improve the blocksize notation.
The blocksize is expressed in bytes, and the millisecond notation
is supplementary information to make it easier to understand.

(isaki)

Need <sys/types.h> for uint32_t and uintptr_t.

(riastradh)

do {...} while (0) to make DTRACE_PROBE macros proper statements.

(riastradh)

Rename __atomic_fork to __locked_fork and give it &errno as argument.
rtld and libc use different storage, so the initial version would
incorrectly report the failure reason for fork().

There is still a small race condition inside ld.elf_so as it doesn't use
thread-safe errno internally, but that's a more contained internal
issue.

(joerg)

Rename "syscall" to "_syscall" and provide "syscall" as a weak alias.

(thorpej)

read feature-persistent value on connect, e.g. the Linux Dom0 writes
the value only together with the device info; no functional difference,
since we don't allow persistent mappings

(jdolecek)

document history

(sevan)

grammar

(sevan)

If we get an event for another CPU just ignore it. The hypervisor will
callback on the other CPU anyway.

(bouyer)

If possible, register a per-cpu callback via HVMOP_set_evtchn_upcall_vector.
From FreeBSD. This requires acking the interrupt in hypervisor_pvhvm_callback.

Don't try to use x86_cpu_idle_xen() for PVHVM, it cause the domU to hang.
FreeBSD doesn't seem to use it either.

(bouyer)

Add -s (SINGLE_JOB) from OpenBSD.

(christos)

added blowfish symmetric cipher per RFC4880 9.2

(jhigh)

Extended attribute support for ffsv2, from FreeBSD.

(christos)

Remove trailing comma.

(wiz)

Oops, need the header too.

(christos)

PR/55177: Carlo Arenas: mremap(MAP_REMAPDUP) fails after fork()

(christos)

msk(4): Avoid bus_dmamap_destroy() in msk_stop()

bus_dmamap_destroy() can not be executed in soft interrupt context,
and msk_stop() can be called in soft interrupt context.

As such, move creation and destruction of tx dmamaps to attach() and
detach() functions.

(jakllsch)

Fix trailing whitespace.

(riastradh)

be consistent about byte flipping (cosmetic no functional change)

(christos)

make compile with XBD_DEBUG

(jdolecek)

In _if_down(), release the link state change lock before calling
workqueue_wait().  Add a comment explaining how the locking here
works.

PR kern/55018.

(thorpej)

Add PVHVM multiprocessor support:
We need the hypervisor to be set up before cpus attaches.
Move hypervisor setup to a new function xen_hvm_init(), called at the
beggining of mainbus_attach(). This function searches the cfdata[] array
to see if the hypervisor device is enabled (so you can disable PV
support with
disable hypervisor
from userconf).
For HVM, ci_cpuid doens't match the virtual CPU index needed by Xen.
Introduce ci_vcpuid to cpu_info. Introduce xen_hvm_init_cpu(), to be
called for each CPU in in its context, which initialize ci_vcpuid and
ci_vcpu, and setup the event callback.
Change Xen code to use ci_vcpuid.

Do not call lapic_calibrate_timer() for VM_GUEST_XENPVHVM, we will use
Xen timers.

Don't call lapic_initclocks() from cpu_hatch(); instead set
x86_cpu_initclock_func to lapic_initclocks() in lapic_calibrate_timer(),
and call *(x86_cpu_initclock_func)() from cpu_hatch().
Also call x86_cpu_initclock_func from cpu_attach() for the boot CPU.
As x86_cpu_initclock_func is called for all CPUs, x86_initclock_func can
be a NOP for lapic timer.

Reorganize Xen code for x86_initclock_func/x86_cpu_initclock_func.
Move x86_cpu_idle_xen() to hypervisor_machdep.c

(bouyer)

Call stipending() only on XenPV. Fix spurious fpudna from kernel mode

(bouyer)

Centralize initialisations of delay_func and initclock_func
in x86_machdep.c and export from <x86/machdep.h>
Introduce a x86_dummy_initclock() and a x86_cpu_initclock_func pointer,
to be used later for Xen HVM native clock support.
rename rtclock_tval to x86_rtclock_tval and export from <x86/machdep.h>,
for the benefit of lapic.c

(bouyer)

enable NO_IOBUF_ALIGNED for x_newfs and x_fsck_ffs

(jdolecek)

add NO_IOBUF_ALIGNED to not pull aligned_alloc() for really constrained
boot media

(jdolecek)

Remove unused variable (to fix the build)

(martin)

PMAP_DEBUG has been deleted on arm

(skrll)

Trailing whitespace

(skrll)

Remove PMAP_DEBUG by converting to UVMHIST

(skrll)

It's __RCSID for an extra level of indirection on PPC

(joerg)

Fix copy & pasto in previous (to fix the build)

(martin)

Believe the datablocks predictor when determining if data on a node gets
stored internal or not. Also make a note that the datablocks predictor takes
NO extended attributes stored in the node into account

In rare cases it could lead to confusion where the predictor would say it
wouldn't fit internally when it could just have fitted. This would trigger the
assertion. Now it will on rare accasions create a datablock even though it
might have fitted.

(reinoud)

Regen.

(simonb)

Add ATI Radeon R5/R6/R7 Graphics.

(simonb)

Add an API to get a reference on the identity of an individual byte of
virtual memory, a "virtual object address".  This is not a reference to
a physical byte of memory, per se, but a reference to a byte residing
in a page, owned by a unique UVM object (either a uobj or an anon).  Two
separate address+addresses space tuples that reference the same byte in
an object (such as a location in a shared memory segment) will resolve
to equivalent virtual object addresses.  Even if the residency status
of the page changes, the virtual object address remains unchanged.

struct uvm_voaddr -- a structure that encapsulates this address reference.

uvm_voaddr_acquire() -- a function to acquire this address reference,
given a vm_map and a vaddr_t.

uvm_voaddr_release() -- a function to release this address reference.

uvm_voaddr_compare() -- a function to compare two such address references.

uvm_voaddr_acquire() resolves the COW status of the object address before
acquiring.

In collaboration with riastradh@ and chs@.

(thorpej)

Switch from C11 specific static_assert() to __CTASSERT()

(kamil)

Now that inputFS is dynamically allocated, make sure it's always non-NULL.
Fixes core dumps when building CDE.

(ad)

Move the range example (for 8-11) to follow the range definition, and to
preceed the random (?) discussion (and the corresponding random example)

(pgoyette)

Put back the ? syntax accidentally removed when syncing with the OpenBSD
man page.

(christos)

remove documentation for (non-atomic) boottime, it was eliminated
from kernel in 2020-01-02 by thorpej@

(jdolecek)

Slightly reorder for clarity, and add header.

(maxv)

Fix merge botch

(martin)

Remove the static_assert() fallback for pre-C11 and pre-C++11

C++ without real static_assert() can be incompatible with the C fallback
as presented in openjdk.

A pre-C11 compiler can be picky on the implementation.

(kamil)

Don't use typedef at all for __CTASSERT1.

(joerg)

include aligned_alloc(3), now needed for newfs and fsck_ffs

(jdolecek)

Fix __CTASSERT1() in sys/cdefs.h for recent Clang/LLVM

Clang now implements a restriction on giving non-C-compatible anonymous
structs a typedef name for linkage purposes, as described in C++ committee
paper `P1766R1 <http://wg21.link/p1766r1>'.

https://reviews.llvm.org/D74103

(kamil)

Mark the .ident section as mergable string section to avoid redundant
entries.

(joerg)

Make it compilable with URTWN_DEBUG

(martin)

Update date

(kim)

Fix build after PV locking change

(skrll)

constify xbddkdriver

(jdolecek)

remove some old #if 0 code

(jdolecek)

align buffers used for I/O to DEV_BSIZE so it's executed more optimally
when run for xbd(4) raw (character) device

(jdolecek)

align buffers used for I/O to DEV_BSIZE so it's executed more optimally
when run for xbd(4) device

(jdolecek)

Use UVMHIST_CALLARGS

(skrll)

Improve diagnostic messages.

(isaki)

Fix typo in a comment.

(knakahara)

No functional change:
- modify comment
- whitespace fix

(msaitoh)

Revert previous for now:
http://mail-index.netbsd.org/source-changes/2020/04/16/msg116278.html

The reasoning turned out to be wrong; __KERNEL_RCSID() in header files
does *not* overwrite RCSID in main source files. The real problem is that
it inserts its RCSID into *every* object files. However, it can be still
useful even if heavily duplicated.

(rin)

fix tense (Nelson Beebe)

(christos)

Discard __HAVE_UNLOCKED_PMAP for 4xx; 4xx is uniprocessor architecture,
and everything gets more than 10 times slower by __HAVE_UNLOCKED_PMAP.

Note that we support three supervisor-level architectures for powerpc:
oea, booke, and 4xx. We have three different implementations of pmap as
a result. Whereas oea and booke support multiprocessor, 4xx does not.

(rin)

Stop using __KERNEL_RCSID() in header files; it confuses ident(1) by
overwriting RCSID in main source files.

XXX
The first argument of __KERNEL_RCSID() is neglected for ELF. If we wish
to have RCSID of header files in kernel binary, we need something like
__FBSDID() macro in FreeBSD.

(rin)

With the right timing, V->P operations could change stuff behind the back of
callers working in the opposite direction - fix it.  Tested by skrll@.

(ad)

MOve the #ifdef XENPV block to the end, so that XEN3_DOM0 builds again.

(bouyer)

switch vm_guest to VM_GUEST_XENPVHVM only after all tests succeeded.

(bouyer)

Rename xen/xen/clock.c to xen_clock.c, so that it can be compiled
with x86/isa/clock.c
call events_default_setup() from hypervisor_match to that event
arrays are properly initialised.
Use xen_delay() and xen's timecounter for PVHVM.

(bouyer)

Put the spaces back (they're part of the config(1) syntax) but quote
them to avoid formatting errors

(pgoyette)

Remove extraneous spaces

(pgoyette)

Add Comet Lake support.

(msaitoh)

Regen.

(msaitoh)

- Add some Intel UHD Graphics devices. Mainly taken from OpenBSD.
- Add Comet Lake devices.
- Modify description of Intel 0x591e from HD Graphics to UHD Graphics.
- Add Western Digital WD Blue SN550 NVMe SSD

(msaitoh)

amd64: Xhypervisor_pvhvm_callback has to be in text.user for SVS.
Thanks to maxv@ for helping me with this.
Enable SVS again.
While there, increase ci_idepth before calling do_hypervisor_callback,
and don't touch ci_idepth while looping over pending events.

(bouyer)

fail silently if hypervisor is not found.

(bouyer)

Don't try to attach hypervisor on non Xen; no more error messages about
hypervisor when booting on bare metal.

(bouyer)

Avoid overflow of ci_ipi_events[] in the PVHVM case (it's size is
XEN_NIPIS but we use x86 IPIs): size XEN_NIPIS only for PV, and
CTASSERT that XEN_NIPIS <= X86_NIPI if we ever use Xen IPIs for
PVHVM.

(bouyer)

Update with 92EU changes from -current.

(nat)

Correct rx packet count for 8192EU.  Tested OK.

(nat)

if backend supports it, use indirect segment for I/O requests over 32KB

there is some overhead for backend without persistent mappings
(backend needs to map the extra indirect segment page), but this
makes it possible to queue more I/O if using 64KB block size

tested on NetBSD/amd64 DomU against Linux/amd64 Dom0

(jdolecek)

update padding within 'struct blkif_request_indirect' to be binary
compatible with Linux/i386 - they changed padding so that there is no
structure layout difference between i386 and amd64; there is no change
for amd64 due to implicit padding

since Linux seems to be the only xen blkback implementation supporting
indirect segments, follow that rather than public xen includes; note
their blkif_x86_32_request_indirect handling expect this layout,
particularly padding for i386 before indirect_grefs[]

(jdolecek)

Restore --copy-dt-needed as default. There is too much fallout in pkgsrc
mainly from -lcurses needing -lterminfo.

(christos)

Use if_stat functions.

(nat)

Pull in <sys/rndsource.h>

(nat)

Use if_stat functions.

(nat)

Introduce intermediate locking for fork, so that the dynamic linker is
in a consistent state. This most importantly avoids races between dlopen
and friends and fork, potentially resulting in dead locks in the child
when it itself tries to acquire locks.

(joerg)

Ticket #836

(martin)

Pull up following revision(s) (requested by jdc in ticket #836):

sys/dev/pci/machfb.c: revision 1.98

clean up the video mode selection logic, switch modes only when actually
necessary

while there make some debug output optional

(martin)

Well, no, SVS does't quite work yet.

(bouyer)

SVS is working with PVHVM now

(bouyer)

To allow concurrent page faults on the same set of pages lock the PV
lists.  From ad@ and fixed up by me.

Remove __HAVE_UNLOCKED_PMAP

(skrll)

when checking for physio request check for B_PHYS in b_flags rather
than an internal field, so this works when the original buf is
wrapped by another one by e.g. dk(4)

fixes misfired assert when doing newfs on a wedge, reported by Manuel Bouyer

(jdolecek)

More #ifndef XEN -> #ifndef XENPV

(bouyer)

Fix cur{lwp,cpu} and other bits for MODULES

(skrll)

Shave off 3 instructions per trap

(skrll)

Reorganise sources to make it possible to include Xen PVHVM support in
native kernels. Among others:
- move xen/include/amd64/hypercall.h to amd64/include/xen and
  xen/include/i386/hypercall.h to i386/include/xen
- exclude some native files from the build for xenpv
- add xen to "machine" config statement for amd64 and i386
- split arch/xen/conf/files.xen to arch/xen/conf/files.xen (for pv drivers)
  and arch/xen/conf/files.xen.pv (for full pv support)
- add GENERIC_XENHVM kernel config which includes GENERIC and add Xen PV
  drivers.

(bouyer)

add the case of kdb_trap(-1) called from pic_ipi_ddb().
it depended on the update timing of 'db_recover'.

(ryo)

Sort SEE ALSO.

(wiz)

Don't KASSERT there's an FPU present.  QEMU doesn't have one...

(skrll)

More KNF

(skrll)

No functional change:
- Rename ci_cpuid_level to ci_max_cpuid and ci_cpuid_extlevel to
  ci_max_ext_cpuid to match x86/include/cpu.h though cpuctl/arch/i386.c added
  them first.
- Sort some entries.
- Add comment.

(msaitoh)

need more ||

(christos)

fix backslash

(christos)

Switch sha3 to the assembly version (fix the build)

(christos)

switch ppc to the new binutils

(christos)