Garbage collect sleep_abort(); it doesn't do anything useful anymore.

ok deraadt@, mlarkin@

Adds request_sleep(), a MI way of sending the machine to sleep in
a safe thread. Support is limited to amd64, i386 and arm64 at the
moment, macppc gets only an empty stub.

feedback from kettenis@
tested by bluhm@
ok phessler@

Suspend from suspend_taskq in apmioctl.

ok kettenis@

Adjust knote(9) API

Make knote(9) lock the knote list internally, and add knote_locked(9)
for the typical situation where the list is already locked.

Remove the KNOTE(9) macro to simplify the API.

Manual page OK jmc@
OK mpi@ mvs@

Simplify the (so far unused) apm_record_event() function a bit and use it
to send a resume event to userland when we come out of suspend.

ok deraadt@

Implement suspend on lid close.

ok tobhe@, deraadt@

pscivar.h include no longer needed
ok kettenis@

arm64 can suspend without PSCI support now

ok deraadt@, phessler@

Implement the fundamentals for suspend/resume on arm64. This uses PSCI
to turn off the secondary CPUs and suspend the primary CPU using the
CPU_OFF and SYSTEM_SUSPEND calls. A new "halt" IPI is added to turn off
the ssecondary CPUs. This IPI is implemented for the ampintc(4) and
agintc(4) interrupt controllers. Fulle suspend/resume support is only
implemented for ampintc(4). This is enough to suspend and resume boards
based on the Allwinner A64 SoC, provided the necessary wakeup interrupts
have been set up (not part of this commit).

ok patrick@

change MD gosleep() and sleep_finish() to return int, the MI code will be
able to react to this suitably.

Since acpitoshiba brightness button processing no longer plays games
with AML parsing outside the acpi thread, the locking-release dance
around wsdisplay_{suspend,resume} can be removed
ok kettenis

when the MI suspend code encounters problems, we need a way to
reset the MD state before bailing out. New MD function sleep_abort()
does that.

MI disable_lid_wakeups() is not needed, x86 systems can do this
in sleep_resume(), which seems sensible for other future systems also

the sleep_clocks() hook is not needed because the architectures which
need to do this can do it a few moments later in a different hook

sleep_cpu/resume_cpu are part of an earlier MI split attempt
noticed by kettenis

#ifdef the SUSPEND ioctl block

*** empty log message ***

Constify struct cfattach.

ok visa@ a long time ago, ok patrick@

Fix errno, merge ioctl cases

The EBADF error is always overwritten for the standby, suspend and
hibernate ioctls, only the mode ioctl has it right.

Merge the now identical casese while here.

OK patrick

Refactor klist insertion and removal

Rename klist_{insert,remove}() to klist_{insert,remove}_locked().
These functions assume that the caller has locked the klist. The current
state of locking remains intact because the kernel lock is still used
with all klists.

Add new functions klist_insert() and klist_remove() that lock the klist
internally. This allows some code simplification.

OK mpi@

dev/rndvar.h no longer has statistical interfaces (removed during various
conversion steps). it only contains kernel prototypes for 4 interfaces,
all of which legitimately belong in sys/systm.h, which are already included
by all enqueue_randomness() users.

Abstract the head of knote lists. This allows extending the lists,
for example, with locking assertions.

OK mpi@, anton@

Replace field f_isfd with field f_flags in struct filterops to allow
adding more filter properties without cluttering the struct.

OK mpi@, anton@

Use C99 designated initializers with struct filterops. In addition,
make the structs const so that the data are put in .rodata.

OK mpi@, deraadt@, anton@, bluhm@

Add the apm(4) subsystem to arm64.

NB: acpi(4) is not hooked up to this yet.

previous version OK deraadt@ patrick@
OK jsg@

Adds request_sleep(), a MI way of sending the machine to sleep in
a safe thread. Support is limited to amd64, i386 and arm64 at the
moment, macppc gets only an empty stub.

feedback from kettenis@
tested by bluhm@
ok phessler@

Suspend from suspend_taskq in apmioctl.

ok kettenis@

Adjust knote(9) API

Make knote(9) lock the knote list internally, and add knote_locked(9)
for the typical situation where the list is already locked.

Remove the KNOTE(9) macro to simplify the API.

Manual page OK jmc@
OK mpi@ mvs@

Simplify the (so far unused) apm_record_event() function a bit and use it
to send a resume event to userland when we come out of suspend.

ok deraadt@

Implement suspend on lid close.

ok tobhe@, deraadt@

pscivar.h include no longer needed
ok kettenis@

arm64 can suspend without PSCI support now

ok deraadt@, phessler@

Implement the fundamentals for suspend/resume on arm64. This uses PSCI
to turn off the secondary CPUs and suspend the primary CPU using the
CPU_OFF and SYSTEM_SUSPEND calls. A new "halt" IPI is added to turn off
the ssecondary CPUs. This IPI is implemented for the ampintc(4) and
agintc(4) interrupt controllers. Fulle suspend/resume support is only
implemented for ampintc(4). This is enough to suspend and resume boards
based on the Allwinner A64 SoC, provided the necessary wakeup interrupts
have been set up (not part of this commit).

ok patrick@

change MD gosleep() and sleep_finish() to return int, the MI code will be
able to react to this suitably.

Since acpitoshiba brightness button processing no longer plays games
with AML parsing outside the acpi thread, the locking-release dance
around wsdisplay_{suspend,resume} can be removed
ok kettenis

when the MI suspend code encounters problems, we need a way to
reset the MD state before bailing out. New MD function sleep_abort()
does that.

MI disable_lid_wakeups() is not needed, x86 systems can do this
in sleep_resume(), which seems sensible for other future systems also

the sleep_clocks() hook is not needed because the architectures which
need to do this can do it a few moments later in a different hook

sleep_cpu/resume_cpu are part of an earlier MI split attempt
noticed by kettenis

#ifdef the SUSPEND ioctl block

*** empty log message ***

Constify struct cfattach.

ok visa@ a long time ago, ok patrick@

Fix errno, merge ioctl cases

The EBADF error is always overwritten for the standby, suspend and
hibernate ioctls, only the mode ioctl has it right.

Merge the now identical casese while here.

OK patrick

Refactor klist insertion and removal

Rename klist_{insert,remove}() to klist_{insert,remove}_locked().
These functions assume that the caller has locked the klist. The current
state of locking remains intact because the kernel lock is still used
with all klists.

Add new functions klist_insert() and klist_remove() that lock the klist
internally. This allows some code simplification.

OK mpi@

dev/rndvar.h no longer has statistical interfaces (removed during various
conversion steps). it only contains kernel prototypes for 4 interfaces,
all of which legitimately belong in sys/systm.h, which are already included
by all enqueue_randomness() users.

Abstract the head of knote lists. This allows extending the lists,
for example, with locking assertions.

OK mpi@, anton@

Replace field f_isfd with field f_flags in struct filterops to allow
adding more filter properties without cluttering the struct.

OK mpi@, anton@

Use C99 designated initializers with struct filterops. In addition,
make the structs const so that the data are put in .rodata.

OK mpi@, deraadt@, anton@, bluhm@

Add the apm(4) subsystem to arm64.

NB: acpi(4) is not hooked up to this yet.

previous version OK deraadt@ patrick@
OK jsg@

Suspend from suspend_taskq in apmioctl.

ok kettenis@

Adjust knote(9) API

Make knote(9) lock the knote list internally, and add knote_locked(9)
for the typical situation where the list is already locked.

Remove the KNOTE(9) macro to simplify the API.

Manual page OK jmc@
OK mpi@ mvs@

Simplify the (so far unused) apm_record_event() function a bit and use it
to send a resume event to userland when we come out of suspend.

ok deraadt@

Implement suspend on lid close.

ok tobhe@, deraadt@

pscivar.h include no longer needed
ok kettenis@

arm64 can suspend without PSCI support now

ok deraadt@, phessler@

Implement the fundamentals for suspend/resume on arm64. This uses PSCI
to turn off the secondary CPUs and suspend the primary CPU using the
CPU_OFF and SYSTEM_SUSPEND calls. A new "halt" IPI is added to turn off
the ssecondary CPUs. This IPI is implemented for the ampintc(4) and
agintc(4) interrupt controllers. Fulle suspend/resume support is only
implemented for ampintc(4). This is enough to suspend and resume boards
based on the Allwinner A64 SoC, provided the necessary wakeup interrupts
have been set up (not part of this commit).

ok patrick@

change MD gosleep() and sleep_finish() to return int, the MI code will be
able to react to this suitably.

Since acpitoshiba brightness button processing no longer plays games
with AML parsing outside the acpi thread, the locking-release dance
around wsdisplay_{suspend,resume} can be removed
ok kettenis

when the MI suspend code encounters problems, we need a way to
reset the MD state before bailing out. New MD function sleep_abort()
does that.

MI disable_lid_wakeups() is not needed, x86 systems can do this
in sleep_resume(), which seems sensible for other future systems also

the sleep_clocks() hook is not needed because the architectures which
need to do this can do it a few moments later in a different hook

sleep_cpu/resume_cpu are part of an earlier MI split attempt
noticed by kettenis

#ifdef the SUSPEND ioctl block

*** empty log message ***

Constify struct cfattach.

ok visa@ a long time ago, ok patrick@

Fix errno, merge ioctl cases

The EBADF error is always overwritten for the standby, suspend and
hibernate ioctls, only the mode ioctl has it right.

Merge the now identical casese while here.

OK patrick

Refactor klist insertion and removal

Rename klist_{insert,remove}() to klist_{insert,remove}_locked().
These functions assume that the caller has locked the klist. The current
state of locking remains intact because the kernel lock is still used
with all klists.

Add new functions klist_insert() and klist_remove() that lock the klist
internally. This allows some code simplification.

OK mpi@

dev/rndvar.h no longer has statistical interfaces (removed during various
conversion steps). it only contains kernel prototypes for 4 interfaces,
all of which legitimately belong in sys/systm.h, which are already included
by all enqueue_randomness() users.

Abstract the head of knote lists. This allows extending the lists,
for example, with locking assertions.

OK mpi@, anton@

Replace field f_isfd with field f_flags in struct filterops to allow
adding more filter properties without cluttering the struct.

OK mpi@, anton@

Use C99 designated initializers with struct filterops. In addition,
make the structs const so that the data are put in .rodata.

OK mpi@, deraadt@, anton@, bluhm@

Add the apm(4) subsystem to arm64.

NB: acpi(4) is not hooked up to this yet.

previous version OK deraadt@ patrick@
OK jsg@

Adjust knote(9) API

Make knote(9) lock the knote list internally, and add knote_locked(9)
for the typical situation where the list is already locked.

Remove the KNOTE(9) macro to simplify the API.

Manual page OK jmc@
OK mpi@ mvs@

Simplify the (so far unused) apm_record_event() function a bit and use it
to send a resume event to userland when we come out of suspend.

ok deraadt@

Implement suspend on lid close.

ok tobhe@, deraadt@

pscivar.h include no longer needed
ok kettenis@

arm64 can suspend without PSCI support now

ok deraadt@, phessler@

Implement the fundamentals for suspend/resume on arm64. This uses PSCI
to turn off the secondary CPUs and suspend the primary CPU using the
CPU_OFF and SYSTEM_SUSPEND calls. A new "halt" IPI is added to turn off
the ssecondary CPUs. This IPI is implemented for the ampintc(4) and
agintc(4) interrupt controllers. Fulle suspend/resume support is only
implemented for ampintc(4). This is enough to suspend and resume boards
based on the Allwinner A64 SoC, provided the necessary wakeup interrupts
have been set up (not part of this commit).

ok patrick@

change MD gosleep() and sleep_finish() to return int, the MI code will be
able to react to this suitably.

Since acpitoshiba brightness button processing no longer plays games
with AML parsing outside the acpi thread, the locking-release dance
around wsdisplay_{suspend,resume} can be removed
ok kettenis

when the MI suspend code encounters problems, we need a way to
reset the MD state before bailing out. New MD function sleep_abort()
does that.

MI disable_lid_wakeups() is not needed, x86 systems can do this
in sleep_resume(), which seems sensible for other future systems also

the sleep_clocks() hook is not needed because the architectures which
need to do this can do it a few moments later in a different hook

sleep_cpu/resume_cpu are part of an earlier MI split attempt
noticed by kettenis

#ifdef the SUSPEND ioctl block

*** empty log message ***

Constify struct cfattach.

ok visa@ a long time ago, ok patrick@

Fix errno, merge ioctl cases

The EBADF error is always overwritten for the standby, suspend and
hibernate ioctls, only the mode ioctl has it right.

Merge the now identical casese while here.

OK patrick

Refactor klist insertion and removal

Rename klist_{insert,remove}() to klist_{insert,remove}_locked().
These functions assume that the caller has locked the klist. The current
state of locking remains intact because the kernel lock is still used
with all klists.

Add new functions klist_insert() and klist_remove() that lock the klist
internally. This allows some code simplification.

OK mpi@

dev/rndvar.h no longer has statistical interfaces (removed during various
conversion steps). it only contains kernel prototypes for 4 interfaces,
all of which legitimately belong in sys/systm.h, which are already included
by all enqueue_randomness() users.

Abstract the head of knote lists. This allows extending the lists,
for example, with locking assertions.

OK mpi@, anton@

Replace field f_isfd with field f_flags in struct filterops to allow
adding more filter properties without cluttering the struct.

OK mpi@, anton@

Use C99 designated initializers with struct filterops. In addition,
make the structs const so that the data are put in .rodata.

OK mpi@, deraadt@, anton@, bluhm@

Add the apm(4) subsystem to arm64.

NB: acpi(4) is not hooked up to this yet.

previous version OK deraadt@ patrick@
OK jsg@

Simplify the (so far unused) apm_record_event() function a bit and use it
to send a resume event to userland when we come out of suspend.

ok deraadt@

Implement suspend on lid close.

ok tobhe@, deraadt@

pscivar.h include no longer needed
ok kettenis@

arm64 can suspend without PSCI support now

ok deraadt@, phessler@

Implement the fundamentals for suspend/resume on arm64. This uses PSCI
to turn off the secondary CPUs and suspend the primary CPU using the
CPU_OFF and SYSTEM_SUSPEND calls. A new "halt" IPI is added to turn off
the ssecondary CPUs. This IPI is implemented for the ampintc(4) and
agintc(4) interrupt controllers. Fulle suspend/resume support is only
implemented for ampintc(4). This is enough to suspend and resume boards
based on the Allwinner A64 SoC, provided the necessary wakeup interrupts
have been set up (not part of this commit).

ok patrick@

change MD gosleep() and sleep_finish() to return int, the MI code will be
able to react to this suitably.

Since acpitoshiba brightness button processing no longer plays games
with AML parsing outside the acpi thread, the locking-release dance
around wsdisplay_{suspend,resume} can be removed
ok kettenis

when the MI suspend code encounters problems, we need a way to
reset the MD state before bailing out. New MD function sleep_abort()
does that.

MI disable_lid_wakeups() is not needed, x86 systems can do this
in sleep_resume(), which seems sensible for other future systems also

the sleep_clocks() hook is not needed because the architectures which
need to do this can do it a few moments later in a different hook

sleep_cpu/resume_cpu are part of an earlier MI split attempt
noticed by kettenis

#ifdef the SUSPEND ioctl block

*** empty log message ***

Constify struct cfattach.

ok visa@ a long time ago, ok patrick@

Fix errno, merge ioctl cases

The EBADF error is always overwritten for the standby, suspend and
hibernate ioctls, only the mode ioctl has it right.

Merge the now identical casese while here.

OK patrick

Refactor klist insertion and removal

Rename klist_{insert,remove}() to klist_{insert,remove}_locked().
These functions assume that the caller has locked the klist. The current
state of locking remains intact because the kernel lock is still used
with all klists.

Add new functions klist_insert() and klist_remove() that lock the klist
internally. This allows some code simplification.

OK mpi@

dev/rndvar.h no longer has statistical interfaces (removed during various
conversion steps). it only contains kernel prototypes for 4 interfaces,
all of which legitimately belong in sys/systm.h, which are already included
by all enqueue_randomness() users.

Abstract the head of knote lists. This allows extending the lists,
for example, with locking assertions.

OK mpi@, anton@

Replace field f_isfd with field f_flags in struct filterops to allow
adding more filter properties without cluttering the struct.

OK mpi@, anton@

Use C99 designated initializers with struct filterops. In addition,
make the structs const so that the data are put in .rodata.

OK mpi@, deraadt@, anton@, bluhm@

Add the apm(4) subsystem to arm64.

NB: acpi(4) is not hooked up to this yet.

previous version OK deraadt@ patrick@
OK jsg@

Implement suspend on lid close.

ok tobhe@, deraadt@

pscivar.h include no longer needed
ok kettenis@

arm64 can suspend without PSCI support now

ok deraadt@, phessler@

Implement the fundamentals for suspend/resume on arm64. This uses PSCI
to turn off the secondary CPUs and suspend the primary CPU using the
CPU_OFF and SYSTEM_SUSPEND calls. A new "halt" IPI is added to turn off
the ssecondary CPUs. This IPI is implemented for the ampintc(4) and
agintc(4) interrupt controllers. Fulle suspend/resume support is only
implemented for ampintc(4). This is enough to suspend and resume boards
based on the Allwinner A64 SoC, provided the necessary wakeup interrupts
have been set up (not part of this commit).

ok patrick@

change MD gosleep() and sleep_finish() to return int, the MI code will be
able to react to this suitably.

Since acpitoshiba brightness button processing no longer plays games
with AML parsing outside the acpi thread, the locking-release dance
around wsdisplay_{suspend,resume} can be removed
ok kettenis

when the MI suspend code encounters problems, we need a way to
reset the MD state before bailing out. New MD function sleep_abort()
does that.

MI disable_lid_wakeups() is not needed, x86 systems can do this
in sleep_resume(), which seems sensible for other future systems also

the sleep_clocks() hook is not needed because the architectures which
need to do this can do it a few moments later in a different hook

sleep_cpu/resume_cpu are part of an earlier MI split attempt
noticed by kettenis

#ifdef the SUSPEND ioctl block

*** empty log message ***

Constify struct cfattach.

ok visa@ a long time ago, ok patrick@

Fix errno, merge ioctl cases

The EBADF error is always overwritten for the standby, suspend and
hibernate ioctls, only the mode ioctl has it right.

Merge the now identical casese while here.

OK patrick

Refactor klist insertion and removal

Rename klist_{insert,remove}() to klist_{insert,remove}_locked().
These functions assume that the caller has locked the klist. The current
state of locking remains intact because the kernel lock is still used
with all klists.

Add new functions klist_insert() and klist_remove() that lock the klist
internally. This allows some code simplification.

OK mpi@

dev/rndvar.h no longer has statistical interfaces (removed during various
conversion steps). it only contains kernel prototypes for 4 interfaces,
all of which legitimately belong in sys/systm.h, which are already included
by all enqueue_randomness() users.

Abstract the head of knote lists. This allows extending the lists,
for example, with locking assertions.

OK mpi@, anton@

Replace field f_isfd with field f_flags in struct filterops to allow
adding more filter properties without cluttering the struct.

OK mpi@, anton@

Use C99 designated initializers with struct filterops. In addition,
make the structs const so that the data are put in .rodata.

OK mpi@, deraadt@, anton@, bluhm@

Add the apm(4) subsystem to arm64.

NB: acpi(4) is not hooked up to this yet.

previous version OK deraadt@ patrick@
OK jsg@

pscivar.h include no longer needed
ok kettenis@

arm64 can suspend without PSCI support now

ok deraadt@, phessler@

Implement the fundamentals for suspend/resume on arm64. This uses PSCI
to turn off the secondary CPUs and suspend the primary CPU using the
CPU_OFF and SYSTEM_SUSPEND calls. A new "halt" IPI is added to turn off
the ssecondary CPUs. This IPI is implemented for the ampintc(4) and
agintc(4) interrupt controllers. Fulle suspend/resume support is only
implemented for ampintc(4). This is enough to suspend and resume boards
based on the Allwinner A64 SoC, provided the necessary wakeup interrupts
have been set up (not part of this commit).

ok patrick@

change MD gosleep() and sleep_finish() to return int, the MI code will be
able to react to this suitably.

Since acpitoshiba brightness button processing no longer plays games
with AML parsing outside the acpi thread, the locking-release dance
around wsdisplay_{suspend,resume} can be removed
ok kettenis

when the MI suspend code encounters problems, we need a way to
reset the MD state before bailing out. New MD function sleep_abort()
does that.

MI disable_lid_wakeups() is not needed, x86 systems can do this
in sleep_resume(), which seems sensible for other future systems also

the sleep_clocks() hook is not needed because the architectures which
need to do this can do it a few moments later in a different hook

sleep_cpu/resume_cpu are part of an earlier MI split attempt
noticed by kettenis

#ifdef the SUSPEND ioctl block

*** empty log message ***

Constify struct cfattach.

ok visa@ a long time ago, ok patrick@

Fix errno, merge ioctl cases

The EBADF error is always overwritten for the standby, suspend and
hibernate ioctls, only the mode ioctl has it right.

Merge the now identical casese while here.

OK patrick

Refactor klist insertion and removal

Rename klist_{insert,remove}() to klist_{insert,remove}_locked().
These functions assume that the caller has locked the klist. The current
state of locking remains intact because the kernel lock is still used
with all klists.

Add new functions klist_insert() and klist_remove() that lock the klist
internally. This allows some code simplification.

OK mpi@

dev/rndvar.h no longer has statistical interfaces (removed during various
conversion steps). it only contains kernel prototypes for 4 interfaces,
all of which legitimately belong in sys/systm.h, which are already included
by all enqueue_randomness() users.

Abstract the head of knote lists. This allows extending the lists,
for example, with locking assertions.

OK mpi@, anton@

Replace field f_isfd with field f_flags in struct filterops to allow
adding more filter properties without cluttering the struct.

OK mpi@, anton@

Use C99 designated initializers with struct filterops. In addition,
make the structs const so that the data are put in .rodata.

OK mpi@, deraadt@, anton@, bluhm@

Add the apm(4) subsystem to arm64.

NB: acpi(4) is not hooked up to this yet.

previous version OK deraadt@ patrick@
OK jsg@

arm64 can suspend without PSCI support now

ok deraadt@, phessler@

Implement the fundamentals for suspend/resume on arm64. This uses PSCI
to turn off the secondary CPUs and suspend the primary CPU using the
CPU_OFF and SYSTEM_SUSPEND calls. A new "halt" IPI is added to turn off
the ssecondary CPUs. This IPI is implemented for the ampintc(4) and
agintc(4) interrupt controllers. Fulle suspend/resume support is only
implemented for ampintc(4). This is enough to suspend and resume boards
based on the Allwinner A64 SoC, provided the necessary wakeup interrupts
have been set up (not part of this commit).

ok patrick@

change MD gosleep() and sleep_finish() to return int, the MI code will be
able to react to this suitably.

Since acpitoshiba brightness button processing no longer plays games
with AML parsing outside the acpi thread, the locking-release dance
around wsdisplay_{suspend,resume} can be removed
ok kettenis

when the MI suspend code encounters problems, we need a way to
reset the MD state before bailing out. New MD function sleep_abort()
does that.

MI disable_lid_wakeups() is not needed, x86 systems can do this
in sleep_resume(), which seems sensible for other future systems also

the sleep_clocks() hook is not needed because the architectures which
need to do this can do it a few moments later in a different hook

sleep_cpu/resume_cpu are part of an earlier MI split attempt
noticed by kettenis

#ifdef the SUSPEND ioctl block

*** empty log message ***

Constify struct cfattach.

ok visa@ a long time ago, ok patrick@

Fix errno, merge ioctl cases

The EBADF error is always overwritten for the standby, suspend and
hibernate ioctls, only the mode ioctl has it right.

Merge the now identical casese while here.

OK patrick

Refactor klist insertion and removal

Rename klist_{insert,remove}() to klist_{insert,remove}_locked().
These functions assume that the caller has locked the klist. The current
state of locking remains intact because the kernel lock is still used
with all klists.

Add new functions klist_insert() and klist_remove() that lock the klist
internally. This allows some code simplification.

OK mpi@

dev/rndvar.h no longer has statistical interfaces (removed during various
conversion steps). it only contains kernel prototypes for 4 interfaces,
all of which legitimately belong in sys/systm.h, which are already included
by all enqueue_randomness() users.

Abstract the head of knote lists. This allows extending the lists,
for example, with locking assertions.

OK mpi@, anton@

Replace field f_isfd with field f_flags in struct filterops to allow
adding more filter properties without cluttering the struct.

OK mpi@, anton@

Use C99 designated initializers with struct filterops. In addition,
make the structs const so that the data are put in .rodata.

OK mpi@, deraadt@, anton@, bluhm@

Add the apm(4) subsystem to arm64.

NB: acpi(4) is not hooked up to this yet.

previous version OK deraadt@ patrick@
OK jsg@

Implement the fundamentals for suspend/resume on arm64. This uses PSCI
to turn off the secondary CPUs and suspend the primary CPU using the
CPU_OFF and SYSTEM_SUSPEND calls. A new "halt" IPI is added to turn off
the ssecondary CPUs. This IPI is implemented for the ampintc(4) and
agintc(4) interrupt controllers. Fulle suspend/resume support is only
implemented for ampintc(4). This is enough to suspend and resume boards
based on the Allwinner A64 SoC, provided the necessary wakeup interrupts
have been set up (not part of this commit).

ok patrick@

change MD gosleep() and sleep_finish() to return int, the MI code will be
able to react to this suitably.

Since acpitoshiba brightness button processing no longer plays games
with AML parsing outside the acpi thread, the locking-release dance
around wsdisplay_{suspend,resume} can be removed
ok kettenis

when the MI suspend code encounters problems, we need a way to
reset the MD state before bailing out. New MD function sleep_abort()
does that.

MI disable_lid_wakeups() is not needed, x86 systems can do this
in sleep_resume(), which seems sensible for other future systems also

the sleep_clocks() hook is not needed because the architectures which
need to do this can do it a few moments later in a different hook

sleep_cpu/resume_cpu are part of an earlier MI split attempt
noticed by kettenis

#ifdef the SUSPEND ioctl block

*** empty log message ***

Constify struct cfattach.

ok visa@ a long time ago, ok patrick@

Fix errno, merge ioctl cases

The EBADF error is always overwritten for the standby, suspend and
hibernate ioctls, only the mode ioctl has it right.

Merge the now identical casese while here.

OK patrick

Refactor klist insertion and removal

Rename klist_{insert,remove}() to klist_{insert,remove}_locked().
These functions assume that the caller has locked the klist. The current
state of locking remains intact because the kernel lock is still used
with all klists.

Add new functions klist_insert() and klist_remove() that lock the klist
internally. This allows some code simplification.

OK mpi@

dev/rndvar.h no longer has statistical interfaces (removed during various
conversion steps). it only contains kernel prototypes for 4 interfaces,
all of which legitimately belong in sys/systm.h, which are already included
by all enqueue_randomness() users.

Abstract the head of knote lists. This allows extending the lists,
for example, with locking assertions.

OK mpi@, anton@

Replace field f_isfd with field f_flags in struct filterops to allow
adding more filter properties without cluttering the struct.

OK mpi@, anton@

Use C99 designated initializers with struct filterops. In addition,
make the structs const so that the data are put in .rodata.

OK mpi@, deraadt@, anton@, bluhm@

Add the apm(4) subsystem to arm64.

NB: acpi(4) is not hooked up to this yet.

previous version OK deraadt@ patrick@
OK jsg@

change MD gosleep() and sleep_finish() to return int, the MI code will be
able to react to this suitably.

Since acpitoshiba brightness button processing no longer plays games
with AML parsing outside the acpi thread, the locking-release dance
around wsdisplay_{suspend,resume} can be removed
ok kettenis

when the MI suspend code encounters problems, we need a way to
reset the MD state before bailing out. New MD function sleep_abort()
does that.

MI disable_lid_wakeups() is not needed, x86 systems can do this
in sleep_resume(), which seems sensible for other future systems also

the sleep_clocks() hook is not needed because the architectures which
need to do this can do it a few moments later in a different hook

sleep_cpu/resume_cpu are part of an earlier MI split attempt
noticed by kettenis

#ifdef the SUSPEND ioctl block

*** empty log message ***

Constify struct cfattach.

ok visa@ a long time ago, ok patrick@

Fix errno, merge ioctl cases

The EBADF error is always overwritten for the standby, suspend and
hibernate ioctls, only the mode ioctl has it right.

Merge the now identical casese while here.

OK patrick

Refactor klist insertion and removal

Rename klist_{insert,remove}() to klist_{insert,remove}_locked().
These functions assume that the caller has locked the klist. The current
state of locking remains intact because the kernel lock is still used
with all klists.

Add new functions klist_insert() and klist_remove() that lock the klist
internally. This allows some code simplification.

OK mpi@

dev/rndvar.h no longer has statistical interfaces (removed during various
conversion steps). it only contains kernel prototypes for 4 interfaces,
all of which legitimately belong in sys/systm.h, which are already included
by all enqueue_randomness() users.

Abstract the head of knote lists. This allows extending the lists,
for example, with locking assertions.

OK mpi@, anton@

Replace field f_isfd with field f_flags in struct filterops to allow
adding more filter properties without cluttering the struct.

OK mpi@, anton@

Use C99 designated initializers with struct filterops. In addition,
make the structs const so that the data are put in .rodata.

OK mpi@, deraadt@, anton@, bluhm@

Add the apm(4) subsystem to arm64.

NB: acpi(4) is not hooked up to this yet.

previous version OK deraadt@ patrick@
OK jsg@

MI disable_lid_wakeups() is not needed, x86 systems can do this
in sleep_resume(), which seems sensible for other future systems also

the sleep_clocks() hook is not needed because the architectures which
need to do this can do it a few moments later in a different hook

sleep_cpu/resume_cpu are part of an earlier MI split attempt
noticed by kettenis

#ifdef the SUSPEND ioctl block

*** empty log message ***

Constify struct cfattach.

ok visa@ a long time ago, ok patrick@

Fix errno, merge ioctl cases

The EBADF error is always overwritten for the standby, suspend and
hibernate ioctls, only the mode ioctl has it right.

Merge the now identical casese while here.

OK patrick

Refactor klist insertion and removal

Rename klist_{insert,remove}() to klist_{insert,remove}_locked().
These functions assume that the caller has locked the klist. The current
state of locking remains intact because the kernel lock is still used
with all klists.

Add new functions klist_insert() and klist_remove() that lock the klist
internally. This allows some code simplification.

OK mpi@

dev/rndvar.h no longer has statistical interfaces (removed during various
conversion steps). it only contains kernel prototypes for 4 interfaces,
all of which legitimately belong in sys/systm.h, which are already included
by all enqueue_randomness() users.

Abstract the head of knote lists. This allows extending the lists,
for example, with locking assertions.

OK mpi@, anton@

Replace field f_isfd with field f_flags in struct filterops to allow
adding more filter properties without cluttering the struct.

OK mpi@, anton@

Use C99 designated initializers with struct filterops. In addition,
make the structs const so that the data are put in .rodata.

OK mpi@, deraadt@, anton@, bluhm@

Add the apm(4) subsystem to arm64.

NB: acpi(4) is not hooked up to this yet.

previous version OK deraadt@ patrick@
OK jsg@

the sleep_clocks() hook is not needed because the architectures which
need to do this can do it a few moments later in a different hook

sleep_cpu/resume_cpu are part of an earlier MI split attempt
noticed by kettenis

#ifdef the SUSPEND ioctl block

*** empty log message ***

Constify struct cfattach.

ok visa@ a long time ago, ok patrick@

Fix errno, merge ioctl cases

The EBADF error is always overwritten for the standby, suspend and
hibernate ioctls, only the mode ioctl has it right.

Merge the now identical casese while here.

OK patrick

Refactor klist insertion and removal

Rename klist_{insert,remove}() to klist_{insert,remove}_locked().
These functions assume that the caller has locked the klist. The current
state of locking remains intact because the kernel lock is still used
with all klists.

Add new functions klist_insert() and klist_remove() that lock the klist
internally. This allows some code simplification.

OK mpi@

dev/rndvar.h no longer has statistical interfaces (removed during various
conversion steps). it only contains kernel prototypes for 4 interfaces,
all of which legitimately belong in sys/systm.h, which are already included
by all enqueue_randomness() users.

Abstract the head of knote lists. This allows extending the lists,
for example, with locking assertions.

OK mpi@, anton@

Replace field f_isfd with field f_flags in struct filterops to allow
adding more filter properties without cluttering the struct.

OK mpi@, anton@

Use C99 designated initializers with struct filterops. In addition,
make the structs const so that the data are put in .rodata.

OK mpi@, deraadt@, anton@, bluhm@

Add the apm(4) subsystem to arm64.

NB: acpi(4) is not hooked up to this yet.

previous version OK deraadt@ patrick@
OK jsg@

#ifdef the SUSPEND ioctl block

*** empty log message ***

Constify struct cfattach.

ok visa@ a long time ago, ok patrick@

Fix errno, merge ioctl cases

The EBADF error is always overwritten for the standby, suspend and
hibernate ioctls, only the mode ioctl has it right.

Merge the now identical casese while here.

OK patrick

Refactor klist insertion and removal

Rename klist_{insert,remove}() to klist_{insert,remove}_locked().
These functions assume that the caller has locked the klist. The current
state of locking remains intact because the kernel lock is still used
with all klists.

Add new functions klist_insert() and klist_remove() that lock the klist
internally. This allows some code simplification.

OK mpi@

dev/rndvar.h no longer has statistical interfaces (removed during various
conversion steps). it only contains kernel prototypes for 4 interfaces,
all of which legitimately belong in sys/systm.h, which are already included
by all enqueue_randomness() users.

Abstract the head of knote lists. This allows extending the lists,
for example, with locking assertions.

OK mpi@, anton@

Replace field f_isfd with field f_flags in struct filterops to allow
adding more filter properties without cluttering the struct.

OK mpi@, anton@

Use C99 designated initializers with struct filterops. In addition,
make the structs const so that the data are put in .rodata.

OK mpi@, deraadt@, anton@, bluhm@

Add the apm(4) subsystem to arm64.

NB: acpi(4) is not hooked up to this yet.

previous version OK deraadt@ patrick@
OK jsg@

Constify struct cfattach.

ok visa@ a long time ago, ok patrick@

Fix errno, merge ioctl cases

The EBADF error is always overwritten for the standby, suspend and
hibernate ioctls, only the mode ioctl has it right.

Merge the now identical casese while here.

OK patrick

Refactor klist insertion and removal

Rename klist_{insert,remove}() to klist_{insert,remove}_locked().
These functions assume that the caller has locked the klist. The current
state of locking remains intact because the kernel lock is still used
with all klists.

Add new functions klist_insert() and klist_remove() that lock the klist
internally. This allows some code simplification.

OK mpi@

dev/rndvar.h no longer has statistical interfaces (removed during various
conversion steps). it only contains kernel prototypes for 4 interfaces,
all of which legitimately belong in sys/systm.h, which are already included
by all enqueue_randomness() users.

Abstract the head of knote lists. This allows extending the lists,
for example, with locking assertions.

OK mpi@, anton@

Replace field f_isfd with field f_flags in struct filterops to allow
adding more filter properties without cluttering the struct.

OK mpi@, anton@

Use C99 designated initializers with struct filterops. In addition,
make the structs const so that the data are put in .rodata.

OK mpi@, deraadt@, anton@, bluhm@

Add the apm(4) subsystem to arm64.

NB: acpi(4) is not hooked up to this yet.

previous version OK deraadt@ patrick@
OK jsg@

Fix errno, merge ioctl cases

The EBADF error is always overwritten for the standby, suspend and
hibernate ioctls, only the mode ioctl has it right.

Merge the now identical casese while here.

OK patrick

Refactor klist insertion and removal

Rename klist_{insert,remove}() to klist_{insert,remove}_locked().
These functions assume that the caller has locked the klist. The current
state of locking remains intact because the kernel lock is still used
with all klists.

Add new functions klist_insert() and klist_remove() that lock the klist
internally. This allows some code simplification.

OK mpi@

dev/rndvar.h no longer has statistical interfaces (removed during various
conversion steps). it only contains kernel prototypes for 4 interfaces,
all of which legitimately belong in sys/systm.h, which are already included
by all enqueue_randomness() users.

Abstract the head of knote lists. This allows extending the lists,
for example, with locking assertions.

OK mpi@, anton@

Replace field f_isfd with field f_flags in struct filterops to allow
adding more filter properties without cluttering the struct.

OK mpi@, anton@

Use C99 designated initializers with struct filterops. In addition,
make the structs const so that the data are put in .rodata.

OK mpi@, deraadt@, anton@, bluhm@

Add the apm(4) subsystem to arm64.

NB: acpi(4) is not hooked up to this yet.

previous version OK deraadt@ patrick@
OK jsg@

Refactor klist insertion and removal

Rename klist_{insert,remove}() to klist_{insert,remove}_locked().
These functions assume that the caller has locked the klist. The current
state of locking remains intact because the kernel lock is still used
with all klists.

Add new functions klist_insert() and klist_remove() that lock the klist
internally. This allows some code simplification.

OK mpi@

dev/rndvar.h no longer has statistical interfaces (removed during various
conversion steps). it only contains kernel prototypes for 4 interfaces,
all of which legitimately belong in sys/systm.h, which are already included
by all enqueue_randomness() users.

Abstract the head of knote lists. This allows extending the lists,
for example, with locking assertions.

OK mpi@, anton@

Replace field f_isfd with field f_flags in struct filterops to allow
adding more filter properties without cluttering the struct.

OK mpi@, anton@

Use C99 designated initializers with struct filterops. In addition,
make the structs const so that the data are put in .rodata.

OK mpi@, deraadt@, anton@, bluhm@

Add the apm(4) subsystem to arm64.

NB: acpi(4) is not hooked up to this yet.

previous version OK deraadt@ patrick@
OK jsg@

dev/rndvar.h no longer has statistical interfaces (removed during various
conversion steps). it only contains kernel prototypes for 4 interfaces,
all of which legitimately belong in sys/systm.h, which are already included
by all enqueue_randomness() users.

Abstract the head of knote lists. This allows extending the lists,
for example, with locking assertions.

OK mpi@, anton@

Replace field f_isfd with field f_flags in struct filterops to allow
adding more filter properties without cluttering the struct.

OK mpi@, anton@

Use C99 designated initializers with struct filterops. In addition,
make the structs const so that the data are put in .rodata.

OK mpi@, deraadt@, anton@, bluhm@

Add the apm(4) subsystem to arm64.

NB: acpi(4) is not hooked up to this yet.

previous version OK deraadt@ patrick@
OK jsg@

Abstract the head of knote lists. This allows extending the lists,
for example, with locking assertions.

OK mpi@, anton@

Replace field f_isfd with field f_flags in struct filterops to allow
adding more filter properties without cluttering the struct.

OK mpi@, anton@

Use C99 designated initializers with struct filterops. In addition,
make the structs const so that the data are put in .rodata.

OK mpi@, deraadt@, anton@, bluhm@

Add the apm(4) subsystem to arm64.

NB: acpi(4) is not hooked up to this yet.

previous version OK deraadt@ patrick@
OK jsg@

Replace field f_isfd with field f_flags in struct filterops to allow
adding more filter properties without cluttering the struct.

OK mpi@, anton@

Use C99 designated initializers with struct filterops. In addition,
make the structs const so that the data are put in .rodata.

OK mpi@, deraadt@, anton@, bluhm@

Add the apm(4) subsystem to arm64.

NB: acpi(4) is not hooked up to this yet.

previous version OK deraadt@ patrick@
OK jsg@