VM_MAXUSER_ADDRESS can be undefined when compiling module/coredump;
it varies between machines for evbppc (and possibly evbppc64).

(rin)

Set WARNS=3 to appease sign-compare warnings for mips, mips64, and sparc.

(rin)

Add ATF tests for atomic_ops(3).

(isaki)

Remove unused.

(rin)

Add new ATF t_ptrace_wait* vfork(2) tests

Add traceme_vfork_signalmasked_crash and traceme_vfork_signalignored_crash
tests for crash signals (SIGTRAP, SIGSEGV, SIGILL, SIGFPE, SIGBUS).

These new scenario assert that signal masked/ignored are delivered to
vfork(2)ed child.

All tests pass.

(kamil)

Add missing export of atomic_or_64 (since rev1.1).

(isaki)

various updates for reality.

- arm64, powerpc switched
- arm, hppa, sh3 is ready to switch
- vax dynamic binaries have a problem

(mrg)

Set WARN=3 for sing-compare.

(rin)

ensure that all include dirs are created before make includes runs.

separate the compat vs per-arch -ness of the mtree lists.  merge the
mips64 mtree files into a single file.

(mrg)

Remove redundant test from ATF t_ptrace_wait*

signal3 duplicates traceme_signalmasked_crash(SIGSEGV)

(kamil)

PR/53984: Partial revert of modify lapic_calibrate_timer() in lapic.c r1.69.

(nonaka)

Add additional assert in traceme_signalignored_crash t_ptrace_wait* tests

Check whether sigignore is not reset on a trapsignal under a debugger.
The expected behavior is to not reset it. A side effect of resetting
signal mask is noticable especially with a software/hardware breakpoint
that changes state of a process.

Mark these tests as failing.

(kamil)

Add additional assert in traceme_signalmasked_crash t_ptrace_wait* tests

Check whether signal mask is not reset on a trapsignal under a debugger.
The expected behavior is to not reset it. A side effect of resetting
signal mask is noticable especially with a software/hardware breakpoint
that changes state of a process.

Mark these tests as failing.

(kamil)

Fix assertion failures triggered by usbdi.c,v 1.182, when devices
are detached.

This is because xfers of USBD_NOT_STARTED can be removed from queue
in an invisible way to host controller drivers.

Discussed on tech-kern.

(rin)

Fix system freeze when USB NICs with multiple outstanding transfers
are detached from xhci(4) or ehci(4), that enable up_serialise for
bulk transfers.

The cause of problem is that usbd_ar_pipe() waits xfers of
USBD_NOT_STARTED to be removed, although underlying upm_abort
functions do not remove such queues, as reported by "sc dying".

Therefore, remove xfers of USBD_NOT_STARTED when pipe is closed.

Patch provided by Nick Hudson.

(rin)

Bump default value of WARNS for modules from 3 to 5, and
explicitly set WARNS for modules that fail with WARNS=5.

Also, turn on -Wno-missing-noreturn for clang for some files.

At the moment, among ~ 360 modules,
- 2 (lua and zfs) need WARNS=0
- 1 (solaris) needs WARNS=1
- 136 need WARNS=3 (mostly due to sign-compare)
- 4 need WARNS=4
- others can be compiled with WARNS=5

Discussed on tech-kern.

(rin)

Turn on DIAGNOSTIC by default for modules in HEAD.

Make us sure that it should be commented out for release branches in
a similar manner to kernel configuration files.

Discussed on tech-kern.

(rin)

regen mknative with symver no longer disabled.

(mrg)

don't pass --disable-symver to mknative configure.  this turns off
the checking for gcc 4.6 and some exception handling routines which
we need on several platforms.

this should fix missing symbol issues seen on current-users.

(mrg)

apply -std=gnu++98 to some more files.

state that some hard coded stuff here should be pulled out with mknative.

(mrg)

Fix cut & paste error in comment

(tron)

Typo in member variable name

(martin)

Document return values from menu items opt_action functions, add a
new variant: -1 when functions have fundamentally changed the menu
definition on the fly and the processing functions needs to restart
without looking at the old state (or stale cached pointers).

(martin)

PR bin/53986 from Christian Weisgerber

Skip forward to tomorrow to run a command earlier in the current
hour than now (as well as during an earlier hour of the day).

(kre)

Fix HDMI output; only install cursor_set/cursor_move funcs if hardware cursor is available.

(jmcneill)

Ah no, adapt previous, on AMD RAX is in the VMCB.

(maxv)

Improve the FPU detection: hide XSAVES because we're not allowing it, and
don't set CPUID2_OSXSAVE if the guest didn't first set CR4_OSXSAVE.

With these changes in place, I can boot Windows 10 on NVMM.

(maxv)

Handle MSR_MISC_ENABLE on NVMM-Intel (Intel-specific).

(maxv)

make(1): minor grammar fixes in BUGS section

(gutteridge)

Mark up NULL with Dv.

(wiz)

Two minor fixes.
- 0 -> NULL.
- avoid K&R and sync with reality.

(isaki)

Two minor fixes.
- Add missing AUDIO_PERROR (since 1996!)
- Sort AUDIO_GETFD.

(isaki)

PR/53983: Jonathan Perkins: Fix types for readline compatibility

(christos)

nvpair_remove_nvlist_array: revert part of the rev 1.4 change (it was applied
by mistake because the libnv upsteam code on Github has deviated from FreeBSD,
i.e. it has a different nvlist_set_array_next() logic).

(rmind)

Avoid UB in OsdHardware.c

UBSan: Undefined Behavior in src/sys/dev/acpi/acpica/OsdHardware.c:265:17,
left shift of 255 by 24 places cannot be represented in type 'int'

This file isn't part of upstream acpica so just fix it locally.

Reported and initial patch by <Akul Pillai>

(kamil)

Fix reporting EOF via kevent and add a test case

Fix the kernel pty driver to report closed slave via master's kevent
EVFILT_READ.  This behavior matches the behavior for pipes, is
consistent with how FreeBSD implements it and is relied upon by LLDB's
main loop implementation.

Includes feedback by kre and kamil (from tech-kern), commit approved
by kamil.

(mgorny)

Remove the PSE check in the 32bit-PAE MMU. Setting CR4.PAE automatically
enables PSE regardless of whether CR4.PSE is set or not, so we should just
ignore it.

With this in place I can boot Windows 8.1 on NVMM.

(maxv)

Add __diagused.

(hannken)

Add /* FALLTHROUGH */ for DEBUG kernel.

(hannken)

This really was a missing break.

Spotted by Rin Okuyama.

(rjs)

Initialize the guest TSC to zero at VCPU creation time, and handle guest
writes to MSR_TSC at run time.

This is imprecise, because the hardware does not provide a way to preserve
the TSC during #VMEXITs, but that's fine enough.

(maxv)

Added Microsoft Hyper-V support.  It ported from OpenBSD and FreeBSD.

graphical console is not work on Gen.2 VM yet. To use the serial console,
enter "consdev com,0x3f8,115200" on efiboot.

(nonaka)

Add new ATF tests traceme_signal{ignored,masked}_crash* in t_ptrace_wait*

New tests verify that crashes (from trap signals) are delivered to tracer
regardless of the signal masking or signal ignoring option enabled in the
traced child.

All tests pass.

In close future these tests will obtain additional asserts.

(kamil)

Add new ATF tests traceme_raisesignal_ignored in t_ptrace_wait*

Verify that ignoring (with SIG_IGN) in tracee
does not stop tracer from catching this raised signal.

Cover crash signals and already covered ones in other tests.

All tests pass.

(kamil)

move arch/iyonix into evbarm - it's got less machine specific code than most
evbarm/*...
does not quite work yet, but I don't want it to accumulate more differences
to what's in arch/iyonix

(macallan)

get rid of binutils=227-specific files.

(christos)

add breaks for done() since it might not be __dead.

(christos)

sun4v: add debug printout for ALIGN trap

(palle)

PR/53981: Jonathan Perkins: history_list should null-terminate

(christos)

done is not always done (it returns, it is not dead)

(christos)

libpthread isn't used

(prlw1)

Harmonize the handling of the CPL between AMD and Intel.

AMD has a separate guest CPL field, because on AMD, the SYSCALL/SYSRET
instructions do not force SS.DPL to predefined values. On Intel they do,
so the CPL on Intel is just the guest's SS.DPL value.

Even though technically possible on AMD, there is no sane reason for a
guest kernel to set a non-three SS.DPL, doing that would mess up several
common segmentation practices and wouldn't be compatible with Intel.

So, force the Intel behavior on AMD, by always setting SS.DPL<=>CPL.
Remove the now unused CPL field from nvmm_x64_state::misc[]. This actually
increases performance on AMD: to detect interrupt windows the virtualizer
has to modify some fields of misc[], and because CPL was there, we had to
flush the SEG set of the VMCB cache. Now there is no flush necessary.

While here remove the CPL check for XSETBV on Intel, contrary to AMD
Intel checks the CPL before the intercept, so if we receive an XSETBV
VMEXIT, we are certain that it was executed at CPL=0 in the guest. By the
way my check was wrong in the first place, it was reading SS.RPL instead
of SS.DPL.

(maxv)

DEBUG mode only change.  When pretty-printing a word from a parse
tree, don't display a CTLESC which is there only to protect a CTL*
char (a data char that happens to have the same value).  No actual
CTL* chars are printed as data, so no escaping is needed to protect
data which just happens to look the same.  Dropping this avoids the
possibility of confusion/ambiguity in what the word actually contains.

NFC for any normal shell build (very little of this file gets compiled there)

(kre)

Sort, and add a couple obsolete files for binutils=231.

(wiz)

remove the hack to remove .eh_frame -- gcc7 is fixed it seems.

(mrg)

Add the "specialvar" built-in command.  Discussed (well, mentioned
anway) on tech-userlevel with no adverse response.

This allows the magic of vars like HOSTNAME SECONDS, ToD (etc) to be
restored should it be lost - perhaps by having a var of the same name
imported from the environment (which needs to remove the magic in case
a set of scripts are using the env to pass data, and the var name chosen
happens to be one of our magic ones).

No change to SMALL shells (or smaller) - none of the magic vars (except
LINENO, which is exempt from all of this) exist in those, hence such a
shell has no need for this command either.

(kre)

implement return_one for hppa, mips, ppc64, and vax.

(mrg)

put joerg's varasm.c patch back with additional upstream fixes.  now
crtbegin.o has a read-only .eh_frame, and libstdc++ builds.

2017-09-01  Joerg Sonnenberger  <joerg@bec.de>
            Jeff Law  <law@redhat.com>

        * varasm.c (bss_initializer_p): Do not put constants into .bss
        (categorize_decl_for_section): Handle bss_initializer_p returning
        false when DECL_INITIAL is NULL.

2017-11-27  Jakub Jelinek  <jakub@redhat.com>

        PR target/83100
        * varasm.c (bss_initializer_p): Return true for DECL_COMMON
        TREE_READONLY decls.

2018-02-09  Jakub Jelinek  <jakub@redhat.com>

        PR middle-end/84237
        * output.h (bss_initializer_p): Add NAMED argument, defaulted to false.
        * varasm.c (bss_initializer_p): Add NAMED argument, if true, ignore
        TREE_READONLY bit.
        (get_variable_section): For decls in named .bss* sections pass true as
        second argument to bss_initializer_p.

(mrg)

On AMD, the segments have a simple "present" bit. On Intel however there
is an extra "unusable" bit, which has a twisted meaning. We can't just
ignore this bit, because when unset, the CPU performs extra checks on the
other attributes, which may cause VMENTRY to fail and the guest to be
killed.

Typically, on Qemu, some guests like Windows XP trigger two consecutive
getstate+setstate calls, and while processing them, we end up wrongfully
removing the "unusable" bits that were previously set.

Fix that by forcing "unusable = !present". Each hypervisor I could check
does something different, but this seems to be the least problematic
solution for now.

While here, the fields of vmx_guest_segs are VMX indexes, so they should
be uint64_t (no functional change).

(maxv)

Welcome XENPVHVM mode.

It is UP only, has xbd(4) and xennet(4) as PV drivers.

The console is com0 at isa and the native portion is very
rudimentary AT architecture, so is probably suboptimal to
run without PV support.

(cherry)

Fix NLAPIC, NISA and NIOAPIC related conditional compile errors.

This will allow us to now compile an amd64 kernel without PCI.

No functional changes.

(cherry)

Snag the final bits of PV only code to conditionally compile under
-DXENPV

This completes the bifurcation.

The next step is to add -DXENPVHVM code.

(cherry)

Replace signal2 in t_ptrace_wait* with new tests

Add new tests traceme_raisesignal_masked[1-8].

New tests to verify that masking (with SIG_BLOCK) signal in tracee
stops tracer from catching this raised signal. Masked crash signals are
invisible to tracer as well.

All tests pass.

(kamil)

Add new regression scenarios for crash signals in t_ptrace_wait*

Verify correct behavior of crash signals (SIGTRAP, SIGBUS, SIGILL, SIGFPE,
SIGSEGV) in existing test scenarios:
- traceme_raise
- traceme_sendsignal_handle
- traceme_sendsignal_masked
- traceme_sendsignal_ignored
- traceme_sendsignal_simple
- traceme_vfork_raise

These tests verify signals out of the context of CPU trap. These new tests
will help to retain expected behavior in future changes in semantics of
the trapsignals in the kernel.

(kamil)

Sort in alphebetical order a bit.

(msaitoh)

Add KSZ8081 support from FreeBSD.

(msaitoh)

separate RNDIS definitions from urndis(4) for use with Hyper-V NetVSC.

(nonaka)

Regen.

(msaitoh)

Add Tundra (now IDT) TSI381 and PEB383 from OpenBSD.

(msaitoh)

Delete a no-longer-used #define that referred to a struct field that
no longer exists.  Also correct a couple of typos in comments.    NFC.

(kre)

while we're still figuring out the gcc7 vs .eh_frame issue, apply
the don't remove eh_frame hack to mips as well.  hpcmips testbed
is also failing currently:

[  3.1238738] panic: init died (signal 6, exit 12)

(mrg)

sun50i_h6_ccu: add PCIe clocks

(jakllsch)

sun50i_h6_ccu: add "pll_cpux"

Currently intended for display of existing clock rate via the sysctl
tree, and not yet for DVFS.

(jakllsch)

Silent UB alignment issues in acpica under kUBSan

Pass -DACPI_MISALIGNMENT_NOT_SUPPORTED under kUBSan enabled. This option
is dedicated for alignment sensitive CPUs in acpica. It was originally
designed for Itanium CPUs, but nowadays it's wanted for aarch64 as well.

Define it in acpica code under kUBSan in order to pacify Undefined Behavior
reports on all ports (in particular x86). The number of reports is now
halved with this patch applied. The remaining alignment alarms in acpica
will be addressed in future.

Patch contributed by <Akul Pillai>

(kamil)

Fix kUBSan build with GCC7

Add missing __unreachable() and FALLTHROUGH keywords.

Reported by <Akul Pillai>

(kamil)

Note Intel support.

(maxv)

Add Intel-VMX support in NVMM. This allows us to run hardware-accelerated
VMs on Intel CPUs. Overall this implementation is fast and reliable, I am
able to run NetBSD VMs with many VCPUs on a quad-core Intel i5.

NVMM-Intel applies several optimizations already present in NVMM-AMD, and
has a code structure similar to it. No change was needed in the NVMM MI
frontend, or in libnvmm.

Some differences exist against AMD:

- On Intel the ASID space is big, so we don't fall back to a shared ASID
  when there are more VCPUs executing than available ASIDs in the host,
  contrary to AMD. There are enough ASIDs for the maximum number of VCPUs
  supported by NVMM.

- On Intel there are two TLBs we need to take care of, one for the host
  (EPT) and one for the guest (VPID). Changes in EPT paging flush the
  host TLB, changes to the guest mode flush the guest TLB.

- On Intel there is no easy way to set/fetch the VTPR, so we intercept
  reads/writes to CR8 and maintain a software TPR, that we give to the
  virtualizer as if it was the effective TPR in the guest.

- On Intel, because of SVS, the host CR4 and LSTAR are not static, so
  we're forced to save them on each VMENTRY.

- There is extra Intel weirdness we need to take care of, for example the
  reserved bits in CR0 and CR4 when accesses trap.

While this implementation is functional and can already run many OSes, we
likely have a problem on 32bit-PAE guests, because they require special
care on Intel CPUs, and currently we don't handle that correctly; such
guests may misbehave for now (without altering the host stability). I
expect to fix that soon.

(maxv)

Align the kASan message style with kUBSan

Print messages with initial 'ASan', simiarly to kUBSan printing 'UBSan'.

(kamil)

Bump date for previous.

(wiz)

Drop support for software interrupts. I had initially added that to cover
the three event types available on AMD, but Intel has seven of them, all
with weird and twisted meanings, and they require extra parameters.

Software interrupts should not be used anyway.

(maxv)

Conditionally compile a conditionally used variable.

(cherry)

Fix DIAGNOSTIC build; replace FreeBSD-specific function with ours.

(rin)

Add ICS1893C support from FreeBSD.

(msaitoh)

Add CS8204, CS8244 VSC8211 and VSC8601 support from {Free,Open}BSD.

(msaitoh)

regen.

(msaitoh)

Change CS8244's OUI from xxCICADA to CICADA. I don't know whether this
change is correct or not...

(msaitoh)

Add the EPT pmap code, used by Intel-VMX.

The idea is that under NVMM, we don't want to implement the hypervisor page
tables manually in NVMM directly, because we want pageable guests; that is,
we want to allow UVM to unmap guest pages when the host comes under
pressure.

Contrary to AMD-SVM, Intel-VMX uses a different set of PTE bits from
native, and this has three important consequences:

- We can't use the native PTE bits, so each time we want to modify the
  page tables, we need to know whether we're dealing with a native pmap
  or an EPT pmap. This is accomplished with callbacks, that handle
  everything PTE-related.

- There is no recursive slot possible, so we can't use pmap_map_ptes().
  Rather, we walk down the EPT trees via the direct map, and that's
  actually a lot simpler (and probably faster too...).

- The kernel is never mapped in an EPT pmap. An EPT pmap cannot be loaded
  on the host. This has two sub-consequences: at creation time we must
  zero out all of the top-level PTEs, and at destruction time we force
  the page out of the pool cache and into the pool, to ensure that a next
  allocation will invoke pmap_pdp_ctor() to create a native pmap and not
  recycle some stale EPT entries.

To create an EPT pmap, the caller must invoke pmap_ept_transform() on a
newly-allocated native pmap. And that's about it, from then on the EPT
callbacks will be invoked, and the pmap can be destroyed via the usual
pmap_destroy(). The TLB shootdown callback is not initialized however,
it is the responsibility of the hypervisor (NVMM) to set it.

There are some twisted cases that we need to handle. For example if
pmap_is_referenced() is called on a physical page that is entered both by
a native pmap and by an EPT pmap, we take the Accessed bits from the
two pmaps using different PTE sets in each case, and combine them into a
generic PP_ATTRS_U flag (that does not depend on the pmap type).

Given that the EPT layout is a 4-Level tree with the same address space as
native x86_64, we allow ourselves to use a few native macros in EPT, such
as pmap_pa2pte(), rather than re-defining them with "ept" in the name.

Even though this EPT code is rather complex, it is not too intrusive: just
a few callbacks in a few pmap functions, predicted-false to give priority
to native. So this comes with no messy #ifdef or performance cost.

(maxv)

Bump pmax install ramdisk size by another 100k, as 3500k is no longer
enough with GCC 7.

(gson)

Micro optimization: the STAR/LSTAR/CSTAR/SFMASK MSRs are static, so rather
than saving them on each VMENTRY, save them only once, at VCPU creation
time.

(maxv)

Further restrict the scope of XENPV to relevant parts.

(cherry)

Reorder the GPRs to match the CPU encoding, simplifies things on Intel.

(maxv)

Catchup with struct intrstub; unification.

This should fix dom0 build breakage.

(cherry)

Rig the hypercall callback page such that when the kernel happens to
run without a XEN domain loader having previously overwritten the
hypercall page with its hypercall trampoline machine code, we still
get to detect its presence by calling the xen_version hypercall stub.

We use this hack to detect the presence or absence of the hypervisor,
without relying on the MSR support on HVM domains.

This works as an added sanity check that the hypercall page
registration has indeed succeeded in HVM mode.

(cherry)

Missed the crucial header file in previous commit.

struct intrstub; is now uniform across native and XEN

This should fix the XEN builds.

(cherry)

In preparation for debut-ing PVHVM mode:

- Make the struct intrstub uniform across native and XEN.
- Introduce vector callback entrypoints for PVHVM mode.

(cherry)

Regen.

(msaitoh)

- Sort by model number.
- Add missing white space.

(msaitoh)

From FreeBSD:
- Add Broadcom BCM540[24], BCM5424, BCM5466 and BCM54[78]8.
- Add ICS1893C.
- Add Micrel KSZ8081 and KSZ9031.

(msaitoh)

Sort by model number.

(msaitoh)

Regen.

(msaitoh)

- Add Tridium, Data Track Technology, Netas, Ralink Technology,
  Sunplus Technology and ADMtek's OUI.
- Sort by OUI.

(msaitoh)

From OpenBSD:
- Add ASIX OUI.
- Add VIA OUI and devices.
- Add Vitesse OUI and devices.
From FreeBSD:
- Add BROADCOM4.

(msaitoh)

cleanup unused stuff now that we execute directly and not in a separate task.

(christos)

Document options to select alternate GPIO modes.

(mlelstv)

Rename signal1 to signal_mask_unrelated in t_ptrace_wait*

No functional change intended.

(kamil)

Backout previous snprintf nonsense, instead STFU gcc 7's most
useless warning ever.

(martin)

new nsd

(prlw1)

merge conflicts

(prlw1)

Optimize: the hardware does not clear the TLB flush command after a
VMENTRY, so clear it ourselves, to avoid uselessly flushing the guest
TLB. While here also fix the processing of EFER-induced flushes, they
shouldn't be delayed.

(maxv)

Optimize: fetch only 5 bytes instead of 15, the instruction can have only
up to five prefixes.

(maxv)

Add some fallthrough annotations.

(rjs)

Fix build with DIAGNOSTIC:
ASSERT() is enabled ifdef DEBUG, not DIAGNOSTIC.

(rin)

Do not set p->up_serialise twice in usbd_setup_pipe_flags().
No functional changes.

(rin)

Fix, but disable the commented SUN compatibility in st.c to write
final file marks by opening and immediately closing the device
in O_WRONLY mode. That code has not been working since around 1998.
It can now be enabled with options ST_SUNCOMPAT.

(kardel)

Fix PR kern/53949:

Fix inconsistent/incomplete file mark handling to conform again
to mtio(4) at close(2) time. This was necessary as the PREVENT/ALLOW
bracket was reduced from a whole mount session to cover only the
open(2)/close(2) time on ~2002-03-22. The rationale was to allow
robots and humans to change the media during a mount session.

Unfortunately this lead to file marks being written to potentially other
media at the beginning on drives that used the two file marks as EOM
pattern. In order for that to happen the media had to be removed after
data and at most one file mark had been written before removal.

The mount error message has been clarified and a warning about
potential data/file mark lossage on UNIT ATTENTION
during an active mount session with unfinished file marks has been
added.

While there, fix, but disable the commented SUN compatibility to write
final file marks by opening and immediately closing the device
in O_WRONLY mode. That code has not been working since around 1998.
It can now be enabled with options ST_SUNCOMPAT.

Additionally debug output coverage has been extended.

(kardel)

libnv: Free the data array for NV_TYPE_DESCRIPTOR_ARRAY case.
Obtained from FreeBSD rev 343987 by oshogbo@.

(rmind)

libnv: fix multiple memory leaks.

- nvpair_create_stringv: free the temporary string; this fix affects
  nvlist_add_stringf() and nvlist_add_stringv().

- nvpair_remove_nvlist_array (NV_TYPE_NVLIST_ARRAY case): free the chain
  of nvpairs (as resetting it prevents nvlist_destroy() from freeing it).
  Note: freeing the chain in nvlist_destroy() is not sufficient, because
  it would still leak through nvlist_take_nvlist_array().  This affects
  all nvlist_*_nvlist_array() users.

Found by clang/gcc ASAN.  These fixes have been contributed to the
upstream (FreeBSD) repository.

(rmind)

hack alert time:

on sparc and sparc64, don't remove .eh_frame section.  it leads
to failure as something is referenced, and objcopy ends up
emitting a broken binary that can't be run -- it attempts to
load at va=0, beyond having missing referenced data.

also, on sparc64 also don't remove .note.netbsd.mcmodel.

the former should be revised when we can avoid it.

(mrg)

Fix #1187

(martin)

Actually pull up rev 1.139 (as claimed, but not done in previous),
requested by msaitoh in ticket #1187:

Fix bitstring format of Intel CPUID Architectural Performance Monitoring
Fn0000000a %ebx.

(martin)

Move xen event related code which interfaces with the NetBSD interrupt
subsystem into a separate namespace where it can co-exist with the
native equivalent in PVHVM mode.

On PV, we alias and export the native symbols - this means that
although the namespace is different, the semantics must be identical.

Eg: xen_intr_establish_xname() vs. intr_establish_xname().

The specific functions we need in PVHVM are:

- spllower, xen_spllower (for native as well as XEN event spl
  despatch/defer)
- xen_disable_intr()/xen_enable_intr() ,
  x86_disable_intr()/x86_enable_intr()
- xen_read_psl()/xen_write_psl(),
  x86_read_psl()/x86_write_psl()
- intr_establish() et. al, xen_intr_establish() et. al.

This gives us the ability to manage Paravirtualised drivers such as
xbd(4) as well as fully emulated ones such as wd(4)., for eg

(cherry)

conditionally include XENPV specific code.

This explicitly excludes PV only functionality that would be wrong to
attempt to use in other modes, for eg: p2m table management.

(cherry)

compat_sunos depends upon compat_09.  fixes:

[  1.8785495] WARNING: module error: built-in module compat_sunos can't find builtin dependency `compat_09'
[  1.8785495] WARNING: module error: built-in module compat_sunos prerequisite compat_09 failed, error 2

(mrg)

add commented QUOTA2 line.

(mrg)

Refactor lwp_create1 and lwp_exit1 into trace_thread* in ptrace(2) tests

New tests:
- trace_thread1
- trace_thread2
- trace_thread3
- trace_thread4

These tests verify _lwp_create(2) and _lwp_exit(2) events. They are
currently skipped as not reliable.

(kamil)

Fix typo: Parameters are seperated by ','.

(cherry)

Instead of queuing to a separate task, handle the fdwatch events inline.
Fixes locking. We could simplify the code a lot more now.

(christos)

cvs.1 & cvs.texinfo: add information about the "update" command's "-t"
flag to cvs.texinfo, so the installed man and info documentation match
here. This makes cvs.1 auto-generable from cvs.texinfo again, which I
plan to leverage with further additions later.

(gutteridge)

Fix a few off by one (in both directions) in previous, pointed out by mrg.
Avoid open coding snprintf return value checking and introduce a
helper functions that always ensures string termination instead,
suggested by christos.

(martin)

Remove unconditional truncation - it confuses gcc

(martin)

Two more gcc 7 warnings when compiling wiht optimization on, one to go.

(martin)

add parens around defines with expressions that could expand poorly
depending on the usage.

(mrg)

Make sure we properly truncate snprintf() results when the target buffer
is too small, in a way that appeases gcc 7 warnings.

(martin)

Detect and report running in a XEN hvm container.

This allows the lapic code to apply its x2apic probe logic while
running in a XEN hvm container.

(cherry)

-Wno-format-truncation is only needed when using GCC

(tnn)

Remove redundant conditional IDT_VEC() entries.

(cherry)

We reorganise definitions for XEN source support as follows:

XEN - common sources required for baseline XEN support.
XENPV - sources required for support of XEN in PV mode.
XENPVHVM - sources required for support for XEN in HVM mode.
XENPVH - sources required for support for XEN in PVH mode.

(cherry)

Tickets #1187, #1188 and #1189

(martin)

Pull up following revision(s) (requested by msaitoh in ticket #1189):

sys/dev/pci/if_wm.c: revision 1.622
sys/dev/pci/if_wm.c: revision 1.624
sys/dev/pci/if_wm.c: revision 1.625

We now have IFM_2500_KX and IFM_1000_KX, so use them.

-

I21[01]'s RAL size is not 15 but 16(== 82575's value). Same as other OSes.

-

Fix a bug that WOL didn't work on some chips since if_wm.c rev. 1.610.

Set WUC_APME bit older than PCH. Will fixes PR kern/53945 reported by kardel@.
Tested with my own 82574 card.

(martin)

Regen for ticket #1188

(martin)

Pull up following revision(s) (requested by msaitoh in ticket #1188):

sys/dev/pci/pcidevs: revision 1.1360
sys/dev/pci/pcidevs: revision 1.1361
sys/dev/pci/pcidevs: revision 1.1362
sys/dev/pci/pcidevs: revision 1.1357
sys/dev/pci/pcidevs: revision 1.1359

Add yet another Intel Core QuickPath Generic Non-Core Register.

Add some RADEON devices. Mainly taken from OpenBSD.

Add AMD Family 17h devices from OpenBSD.

From OpenBSD:
- Add NetXen's vendor ID and devices.
- Add Sun Neptune.

- Add Some Freescale MPC834x devices from OpenBSD.

- Add Intel I210 SGMII Flash-less device from the spec update document.

(martin)

Pull up following revision(s) (requested by msaitoh in ticket #1187):

usr.sbin/cpuctl/arch/i386.c: revision 1.92
sys/arch/x86/include/specialreg.h: revision 1.138

Add new CPUID flags WAITPKG, CLDEMOTE, MOVDIRI, MOVDIR64B and
IA32_CORE_CAPABILITIES from the latest Intel SDM.

Add Ice Lake and Tremont from the latest Intel SDM.

Fix bitstring format of Intel CPUID Architectural Performance Monitoring
Fn0000000a %ebx.

(martin)

Fix previous, pr_size includes the KASAN redzone. Repurpose pr_reqsize and
use it for PR_ZERO, it holds the size requested by the user with no padding
or redzone added, and only these bytes should be zeroed.

(maxv)

retry timed out IPIs, complain and dump timing info into dmesg
ok martin@

(macallan)

Increase the max guest ram from 4GB to 128GB.

(maxv)

Rename the siginfo4 test in ATF t_ptrace_wait*

The siginfo group of ptrace(2) tests has been replaced with new individual
tests or merged into existing ones. This is the last siginfo* test that
has been renamed.

New name: traceme_exec.

(kamil)

Merge siginfo6 into other PT_STEP tests in t_ptrace_wait*

(kamil)

Drop siginfo5 from ATF tests in t_ptrace_wait*

siginfo5 duplicates older tests verifying PTRACE_FORK.

(kamil)