Previously, a page fault taken during copyin/out and related functions
would run the entire fault handler while permitting direct access to
user addresses. This could also leak across context switches (e.g. if
the page fault handler was preempted by an interrupt or slept for disk
I/O).
To fix, clear SUM in assembly after saving the original version of
SSTATUS in the supervisor mode trapframe.
Reviewed by: mhorne, jrtc27
Sponsored by: DARPA
Differential Revision: https://reviews.freebsd.org/D29763
Notify the TOE driver when when an ICMP type 3 code 4 (Fragmentation
needed and DF set) message is received for an offloaded connection.
This gives the driver an opportunity to lower the path MTU for the
connection and resume transmission, much like what the kernel does for
the connections that it handles.
Reviewed by: glebius@
Sponsored by: Chelsio Communications
Differential Revision: https://reviews.freebsd.org/D29755
Also add an M_ASSERTMAPPED() macro to verify that all mbufs in the chain
are mapped. Use it in ipfw_nat, which operates on a chain returned by
m_megapullup().
PR: 255164
Reviewed by: ae, gallatin
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D29838
If VOP_ADD_WRITECOUNT() or adv locking failed, so VOP_CLOSE() needs to
be called, we cannot use fp fo_close() when there is no fp. This occurs
when e.g. kernel code directly calls vn_open() instead of the open(2)
syscall.
In this case, VOP_CLOSE() can be called directly, after possible lock
upgrade.
Reported by: nvass@gmx.com
PR: 255119
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D29830
- SNDSTAT_LABEL_* are renamed to SNDST_DSPS_*, and SNDSTAT_LABEL_DSPS
becomes SNDST_DSPS.
- Centralize channel number/rate/formats into a single nvlist
The above nvlist is named "info_play" and "info_rec"
- Expose only encoding format in pfmts/rfmts. Userland has no direct
access to AFMT_ENCODING/CHANNEL/EXTCHANNEL macros, thus it serves no
meaning to expose too much information through this pair of labels.
However pminrate/rminrate, pmaxrate/rmaxrate, pfmts/rfmts are
deprecated and will be removed in future.
This commit keeps ioctls ABI compatibility with __FreeBSD_version
1400006 for now. In future the compat ABI with 1400006 will be removed
once audio/virtual_oss is rebuilt.
Sponsored by: The FreeBSD Foundation
Reviewed by: hselasky
Approved by: philip (mentor)
Differential Revision: https://reviews.freebsd.org/D29770
Currently, PCB caching mechanism relies on the rib generation
counter (rnh_gen) to invalidate cached nhops/LLE entries.
With certain fib algorithms, it is now possible that the
datapath lookup state applies RIB changes with some delay.
In that scenario, PCB cache will invalidate on the RIB change,
but the new lookup may result in the same nexthop being returned.
When fib algo finally gets in sync with the RIB changes, PCB cache
will not receive any notification and will end up caching the stale data.
To fix this, introduce additional counter, rnh_gen_rib, which is used
only when FIB_ALGO is enabled.
This counter is incremented by the control plane. Each time when fib algo
synchronises with the RIB, it updates rnh_gen to the current rnh_gen_rib value.
Differential Revision: https://reviews.freebsd.org/D29812
Reviewed by: donner
MFC after: 2 weeks
Address multiple issues with strict rtsock message validation.
D28668 "normalisation" approach was based on the assumption that
we always have at least "standard" sockaddr len.
It turned out to be false - certain older applications like quagga
or routed abuse sin[6]_len field and set it to the offset to the
first fully-zero bit in the mask. It is impossible to normalise
such sockaddrs without reallocation.
With that in mind, change the approach to use a distinct memory
buffer for the altered sockaddrs. This allows supporting the older
software while maintaining the guarantee on the "standard" sockaddrs.
PR: 255273,255089
Differential Revision: https://reviews.freebsd.org/D29826
MFC after: 3 days
iwnstats was not compiling because of some issues raised by the clang
compiler due to -Werror. As a tool it is not connected to world build.
Add missing field "barker_mrc" initialization in struct
iwn_sensitivity_limits for -Wmissing-field-initializers, remove unused
pointer *is on iwn_stats_*_print functions and unused variables for
-Wunused-parameter and -Wunused-variable.
The value for field "barker_mrc" of struct iwn2030_sensitivity_limits
was obtained from linux 3.2 wireless/iwlwifi driver code (iwl-2000.c:115
.barker_corr_th_min_mrc = 390).
Also set BINDIR in Makefile to make it possible to install under
/usr/local/sbin/iwnstats as it require super user.
Reviewed by: adrian
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D29800
In certain cases, e.g. a SYN-flood from a limited set of hosts,
the TCP hostcache becomes the main contention point. To solve
that, this change introduces lockless lookups on the hostcache.
The cache remains a hash, however buckets are now CK_SLIST. For
updates a bucket mutex is obtained, for read an SMR section is
entered.
Reviewed by: markj, rscheff
Differential revision: https://reviews.freebsd.org/D29729
This is further rework of 08d9c92027. Now we carry the knowledge of
lock type all the way through tcp_input() and also into tcp_twcheck().
Ideally the rlocking for pure SYNs should propagate all the way into
the alternative TCP stacks, but not yet today.
This should close a race when socket is bind(2)-ed but not yet
listen(2)-ed and a SYN-packet arrives racing with listen(2), discovered
recently by pho@.
When a rescue retransmission is successful, rather than
inserting new holes to the left of it, adjust the old
rescue entry to cover the missed sequence space.
Also, as snd_fack may be stale by that point, pull it forward
in order to never create a hole left of snd_una/th_ack.
Finally, with DSACKs, tcp_sack_doack() may be called
with new full ACKs but a DSACK block. Account for this
eventuality properly to keep sacked_bytes >= 0.
MFC after: 3 days
Reviewed By: kbowling, tuexen, #transport
Sponsored by: NetApp, Inc.
Differential Revision: https://reviews.freebsd.org/D29835
This change makes the TCP LRO code more generic and flexible with regards
to supporting multiple different TCP encapsulation protocols and in general
lays the ground for broader TCP LRO support. The main job of the TCP LRO code is
to merge TCP packets for the same flow, to reduce the number of calls to upper
layers. This reduces CPU and increases performance, due to being able to send
larger TSO offloaded data chunks at a time. Basically the TCP LRO makes it
possible to avoid per-packet interaction by the host CPU.
Because the current TCP LRO code was tightly bound and optimized for TCP/IP
over ethernet only, several larger changes were needed. Also a minor bug was
fixed in the flushing mechanism for inactive entries, where the expire time,
"le->mtime" was not always properly set.
To avoid having to re-run time consuming regression tests for every change,
it was chosen to squash the following list of changes into a single commit:
- Refactor parsing of all address information into the "lro_parser" structure.
This easily allows to reuse parsing code for inner headers.
- Speedup header data comparison. Don't compare field by field, but
instead use an unsigned long array, where the fields get packed.
- Refactor the IPv4/TCP/UDP checksum computations, so that they may be computed
recursivly, only applying deltas as the result of updating payload data.
- Make smaller inline functions doing one operation at a time instead of
big functions having repeated code.
- Refactor the TCP ACK compression code to only execute once
per TCP LRO flush. This gives a minor performance improvement and
keeps the code simple.
- Use sbintime() for all time-keeping. This change also fixes flushing
of inactive entries.
- Try to shrink the size of the LRO entry, because it is frequently zeroed.
- Removed unused TCP LRO macros.
- Cleanup unused TCP LRO statistics counters while at it.
- Try to use __predict_true() and predict_false() to optimise CPU branch
predictions.
Bump the __FreeBSD_version due to changing the "lro_ctrl" structure.
Tested by: Netflix
Reviewed by: rrs (transport)
Differential Revision: https://reviews.freebsd.org/D29564
MFC after: 2 week
Sponsored by: Mellanox Technologies // NVIDIA Networking
Extract the state killing code from pfioctl() and rephrase the filtering
conditions for readability.
No functional change intended.
MFC after: 1 week
Sponsored by: Rubicon Communications, LLC ("Netgate")
Differential Revision: https://reviews.freebsd.org/D29795
In clang 12.0.0.rc2, going from weak to global is now a hard error:
```
/usr/src/stand/libsa/amd64/_setjmp.S:67:25: error: _longjmp changed binding to STB_GLOBAL
.text; .p2align 4,0x90; .globl _longjmp; .type _longjmp,@function; _longjmp:; .cfi_startproc
```
And the other way is a warning, but we have -Werror:
```
error: __start_set_Xcommand_set changed binding to STB_WEAK [-Werror,-Winline-asm]
error: __stop_set_Xcommand_set changed binding to STB_WEAK [-Werror,-Winline-asm]
```
ref: https://reviews.llvm.org/D90108
Reviewed By: arichardson
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D29159
At a recent testing event I found out that I had misinterpreted
RFC5661 where it describes the stripe size in the File Layout's
nfl_util field. This patch fixes the pNFS File Layout server
so that it returns the correct value to the NFSv4.1/4.2 pNFS
enabled client.
This affects almost no one, since pNFS server configurations
are rare and the extant pNFS aware NFS clients seemed to
function correctly despite the erroneous stripe size.
It *might* be needed for correct behaviour if a recent
Linux client mounts a FreeBSD pNFS server configuration
that is using File Layout (non-mirrored configuration).
MFC after: 2 weeks
Add support for current and future client platform PCI IDs. These are
all I219 variants and have no known driver changes versus previous
generation client platform I219 variants.
Reviewed by: markj
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D29801
There are a number of issues in the e1000 multicast filter handling
that have been present for a long time. Take the updated approach from
ixgbe(4) which does not have the issues.
The issues are outlined in the PR, in particular this solves crossing
over and under the hardware's filter limit, not programming the
hardware filter when we are above its limit, disabling SBP (show bad
packets) when the tunable is enabled and exiting promiscuous mode, and
an off-by-one error in the em_copy_maddr function.
PR: 140647
Reported by: jtl
Reviewed by: markj
MFC after: 1 month
Differential Revision: https://reviews.freebsd.org/D29789
We don't need to set the bits here since the if/else if/else statements
fully cover setting these bit pairs.
Reported by: markj
Reviewed by: markj, erj
Approved by: #intel_networking
MFC aftter: 1 week
Differential Revision: https://reviews.freebsd.org/D29827
Only allocate struct_mm after we checked that other threads do not carry
useful mm_struct. If they don't, drop process lock, allocate, and recheck.
Note that for M_NOWAIT allocations we could avoid dropping process lock,
but I do not think that this increased complexity is useful.
Reviewed by: hselasky
Sponsored by: Mellanox Technologies/NVidia Networking
MFC after: 1 week
Create and use zones for task and mm. Reserve items in zones based on the
estimation of the max number of interrupts in the system. Use M_USE_RESERVE
to allow to take reserved items when allocation occurs from the interrupt
thread context.
Of course, this would only work first time we allocate the task for
interrupt thread. If interrupt is deallocated and allocated anew,
creating a new thread, it might be that zone is depleted. It still
should be good enough for practical uses.
Reviewed by: hselasky
Sponsored by: Mellanox Technologies/NVidia Networking
MFC after: 1 week
For anonymous objects, provide a handle kvo_me naming the object,
and report the handle of the backing object. This allows userspace
to deconstruct the shadow chain. Right now the handle is the address
of the object in KVA, but this is not guaranteed.
For the same anonymous objects, report the swap space used for actually
swapped out pages, in kvo_swapped field. I do not believe that it is
useful to report full 64bit counter there, so only uint32_t value is
returned, clamped to the max.
For kinfo_vmentry, report anonymous object handle backing the entry,
so that the shadow chain for the specific mapping can be deconstructed.
Reviewed by: markj
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D29771
In particular, this avoids malloc(9) calls when from early tunable handling,
with no working malloc yet.
Reported and tested by: mav
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Usually rule counters are reset to zero on every update of the ruleset.
With keepcounters set pf will attempt to find matching rules between old
and new rulesets and preserve the rule counters.
MFC after: 4 weeks
Sponsored by: Rubicon Communications, LLC ("Netgate")
Differential Revision: https://reviews.freebsd.org/D29780
PFRULE_REFS should never be used by userspace, so hide it behind #ifdef
_KERNEL.
MFC after: never
Sponsored by: Rubicon Communications, LLC ("Netgate")
Differential Revision: https://reviews.freebsd.org/D29779
Split the PFRULE_REFS flag from the rule_flag field. PFRULE_REFS is a
kernel-internal flag and should not be exposed to or read from
userspace.
MFC after: 4 weeks
Sponsored by: Rubicon Communications, LLC ("Netgate")
Differential Revision: https://reviews.freebsd.org/D29778
IEEE Std 802.1D-2004 Section 17.14 defines permitted ranges for timers.
Incoming BPDU messages should be checked against the permitted ranges.
The rest of 17.14 appears to be enforced already.
PR: 254924
Reviewed by: kp, donner
Differential Revision: https://reviews.freebsd.org/D29782
This is required for the current Arch Linux binaries to work.
PR: 254112
Reviewed By: emaste
Sponsored By: EPSRC
Differential Revision: https://reviews.freebsd.org/D29218
- Use malloc(9) to allocate ivhd_hdrs list. The previous assumption
that there are at most 10 IVHDs in a system is not true. A counter
example would be a system with 4 IOMMUs, and each IOMMU is related
to IVHDs type 10h, 11h and 40h in the ACPI IVRS table.
- Always scan through the whole ivhd_hdrs list to find IVHDs that has
the same DeviceId but less prioritized IVHD type.
Sponsored by: The FreeBSD Foundation
MFC with: 74ada297e8
Reviewed by: grehan
Approved by: lwhsu (mentor)
Differential Revision: https://reviews.freebsd.org/D29525
The NAV (network allocation vector) register reflects the current MAC
tracking of NAV - when it will stay quiet before transmitting.
Other devices transmit their frame durations in their 802.11 PHY headers
and all devices that hear a frame - even if it's one in an encoding
they don't understand - will understand the low bitrate PHY header that
includes the frame duration. So, they'll set NAV to this value so
they'll stay quiet until the transmit completes.
Anyway, sometimes the PHY NAV header is garbled and sometimes, notably
older broadcom devices, will fake a long NAV so they can get "cleaner" air
for local calibration. When this happens, the hardware will stay quiet
for quite some time and this can lead to missed/stuck beacons, or
(for Very Large Values) a MAC hang.
This code just adds the ability to get/set the NAV; the driver will
need to take care of using it during transmit hangs and beacon misses
to see if it's due to a trash looking NAV.
Fix a few 'if(' to be 'if (' in a few places, per style(9) and
overwhelming usage in the rest of the kernel / tree.
MFC After: 3 days
Sponsored by: Netflix
We prefer 'while (0)' to 'while(0)' according to grep and stlye(9)'s
space after keyword rule. Remove a few stragglers of the latter.
Many of these usages were inconsistent within the file.
MFC After: 3 days
Sponsored by: Netflix
The 'ticket' and 'my_ticket' arguments are both read and written within
the same asm block. Clang is stricter with the constraints than gcc4
was, so accepts the '=r' at face value and will happily overwrite
registers that "should" be preserved.
Mark these operands to not clobber other operands, so they get their own
registers.
This fixes a panic on bringing up the octe interfaces.
Fib algo uses a per-family array indexed by the fibnum to store
lookup function pointers and per-fib data.
Each algorithm rebuild currently requires re-allocating this array
to support atomic change of two pointers.
As in reality most of the changes actually involve changing only
data pointer, add a shortcut performing in-flight pointer update.
MFC after: 2 weeks
Some algorithms may require updating datapath and control plane
algo pointers after the (batched) updates.
Export fib_set_datapath_ptr() to allow setting the new datapath
function or data pointer from the algo.
Add fib_set_algo_ptr() to allow updating algo control plane
pointer from the algo.
Add fib_epoch_call() epoch(9) wrapper to simplify freeing old
datapath state.
Reviewed by: zec
Differential Revision: https://reviews.freebsd.org/D29799
MFC after: 1 week
Adding support for TCP over UDP allows communication with
TCP stacks which can be implemented in userspace without
requiring special priviledges or specific support by the OS.
This is joint work with rrs.
Reviewed by: rrs
Sponsored by: Netflix, Inc.
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D29469
We must make sure that incoming packets will never overflow the netmap
buffers, even when the user is using the offset feature. In the typical
scenario, the netmap buffer is 2KiB and, with an MTU of 1500, there are
~500 bytes available for user offsets.
Unfortunately, some NICs accept incoming packets even when they are
larger then the MTU. This means that the only way to stop DMA from
overflowing the netmap buffers, when offsets are allowed, is to choose
a hardware buffer length which is smaller than the netmap buffer
length. For most NICs and for 2KiB netmap buffers, this means 1024
bytes, which is unconveniently small.
The current code will select the small hardware buf size even when
offsets are not in use. The main purpose of this change is to
fix this bug by returning to the normal behavior for the no-offsets
case.
At the same time, the patch pushes the handling of the offset case
to the lower level driver code, so that it can be made NIC-specific
(in future patches).
driver_t was supposed to just be a quick hack for 4.x
compatibility. However, it's been documented now as the preferred API
rather than the replacement kobj_class_t. Drop the note about 4.x since
it's clear we're a bit late to retiring its use through the tree with
almost 1500 references to driver_t.
Sponsored by: Netflix
Maintain code similarity between RACK and base stack
for ECN. This may not strictly be necessary, depending
when a state transition to FIN_WAIT_1 is done in RACK
after a shutdown() or close() syscall.
MFC after: 3 days
Reviewed By: tuexen, #transport
Sponsored by: NetApp, Inc.
Differential Revision: https://reviews.freebsd.org/D29658
First, two of those four checks are unreachable.
Second, I don't believe there should be ">=" instead of ">".
Third, bus_dma(9) already returns the same EFBIG if ">".
This fixes false I/O errors in worst S/G cases with maxphys >= 2MB.
MFC after: 1 week
This is the April update to vendor/wpa committed upstream
2021/04/07.
This is MFV efec822389.
Suggested by: philip
Reviewed by: philip
MFC after: 2 months
Differential Revision: https://reviews.freebsd.org/D29744
Explicitly disable ring synchronization before calling
callbacks that may result in a hardware reset.
Before this patch we relied on capturing the down/up events which,
however, may not be issued by all drivers.
As full support of RFC6675 is in place, deprecating
net.inet.tcp.rfc6675_pipe and enabling by default
net.inet.tcp.sack.revised.
Reviewed By: #transport, kbowling, rrs
Sponsored by: NetApp, Inc.
Differential Revision: https://reviews.freebsd.org/D28702
"It looks like it would be less confusing to rename 'count' to
something like 'idx', since that's what it's used for in this
function."
Reviewed by: erj
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D29798
Adds OPAL_CONSOLE_WRITE error handling and implements a call to
OPAL_CONSOLE_WRITE_BUFFER_SPACE to verify if there's enough space
before writing to console.
This fixes serial port output getting corrupted on fast writes, like
on "dmesg" output.
Tested on Raptor Blackbird running powerpc64 BE kernel
Reviewed by: luporl
Sponsored by: Eldorado Reserach Institute (eldorado.org.br)
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D29063
There is a weird limit of AGTIAPI_MAX_DMA_SEGS (128) S/G segments per
I/O since the initial driver import. I don't know why it was added,
can only guess some hardware limitation, but in worst case it means
maximum I/O size of 508KB. Respect it to be safe, rounding to 256KB.
MFC after: 1 week
Sponsored by: iXsystems, Inc.
It is a direct request for data corruptions, one report of which we
have received. I am very surprised that only one.
MFC after: 1 week
Sponsored by: iXsystems, Inc.
Without it, Qt5 apps from Focal fail to start, being unable to load
their plugins. It's also necessary for glibc 2.33, as found in recent
Arch snapshots.
PR: 254112
Reviewed By: kib
Sponsored by: The FreeBSD Foundation, EPSRC
Differential Revision: https://reviews.freebsd.org/D28192
Use M_NOWAIT flag when hash growing is called from callout.
PR: 255041
Reviewed by: kevans
MFC after: 10 days
Differential Revision: https://reviews.freebsd.org/D29772
A security feature from c06f087ccb appeared to be a huge bottleneck
under SYN flood. To mitigate that add a sysctl that would make
syncache(4) globally visible, ignoring UID/GID, jail(2) and mac(4)
checks. When turned on, we won't need to call crhold() on the listening
socket credential for every incoming SYN packet.
Reviewed by: bz
This reverts commit 9edaceca81.
It turns out that the Linux client intentionally does an NFSv4.1
RPC with only a Sequence operation in it and with "seqid + 1"
for the slot. This is used to re-synchronize the slot's seqid
and the client expects the NFS4ERR_SEQ_MISORDERED error reply.
As such, revert the patch, so that the server remains RFC5661
compliant.
Initial fib algo implementation was build on a very simple set of
principles w.r.t updates:
1) algorithm is ether able to apply the change synchronously (DIR24-8)
or requires full rebuild (bsearch, lradix).
2) framework falls back to rebuild on every error (memory allocation,
nhg limit, other internal algo errors, etc).
This changes brings the new "intermediate" concept - batched updates.
Algotirhm can indicate that the particular update has to be handled in
batched fashion (FLM_BATCH).
The framework will write this update and other updates to the temporary
buffer instead of pushing them to the algo callback.
Depending on the update rate, the framework will batch 50..1024 ms of updates
and submit them to a different algo callback.
This functionality is handy for the slow-to-rebuild algorithms like DXR.
Differential Revision: https://reviews.freebsd.org/D29588
Reviewed by: zec
MFC after: 2 weeks
Restore 525e07418c after the iflib conversion of igb(4). This
reenables random MAC address generation when attaching to a VF with a
zeroed MAC.
PR: 253535
Reported by: Balaev PA <mail@void.so>
Reviewed by: markj
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D29785
The boundary differentiating "lem" vs "em" class devices was wrong
after the iflib conversion of lem(4).
The Packet Buffer size for 82547 class chips was not set correctly
after the iflib conversion of lem(4).
These changes restore functionality on an 82547 for the submitter.
PR: 236119
Reported by: Jeff Gibbons <jgibbons@protogate.com>
Reviewed by: markj
MFC after: 1 month
Differential Revision: https://reviews.freebsd.org/D29766
This is a debugging tunable that shouldn't have retained this setting
after the initial iflib conversion of the driver
PR: 248934
Reported by: Franco Fichtner <franco@opnsense.org>
Reviewed by: markj
MFC after: 1 month
Differential Revision: https://reviews.freebsd.org/D29768
As this controller requires firmware patch downloading to operate.
"Intel Wireless 7265" support in iwmbtfw(8) is yet to be done.
Tested by: arrowd et al
PR: 228787
MFC after: 2 weeks
Unconditional execution of "clear feature" request at SETUP stage was
workaround for probe failures on ng_ubt.ko re-kldloading which is
unnecessary now.
Reviewed by: hselasky
MFC after: 2 weeks
Differential revision: https://reviews.freebsd.org/D29775
The trunc_dependencies() issue was reported by Alexander Lochmann
<alexander.lochmann@tu-dortmund.de>, who found the problem by performing
lock analysis using LockDoc, see https://doi.org/10.1145/3302424.3303948.
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
if VREAD access is checked as allowed during open
Requested by: wulf
Reviewed by: markj
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D29323
When O_NOFOLLOW is specified, namei() returns the symlink itself. In
this case, open(O_PATH) should be allowed, to denote the location of symlink
itself.
Prevent O_EXEC in this case, execve(2) code is not ready to try to execute
symlinks.
Reported by: wulf
Reviewed by: markj
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D29323
by only keeping hold count on the vnode, instead of the use count.
Reviewed by: markj
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D29323
It is currently allowed to fchownat(2), fchmodat(2), fchflagsat(2),
utimensat(2), fstatat(2), and linkat(2).
For linkat(2), PRIV_VFS_FHOPEN privilege is required to exercise the flag.
It allows to link any open file.
Requested by: trasz
Tested by: pho, trasz
Reviewed by: markj
Sponsored by: The FreeBSD Foundation
MFC after: 2 weeks
Differential revision: https://reviews.freebsd.org/D29111
When quotas are enabled with the quotaon(8) command, it sets the
MNT_QUOTA flag in the mount structure mnt_flag field. The mount
structure holds a cached copy of the filesystem statfs structure
in mnt_stat that includes a copy of the mnt_flag field in
mnt_stat.f_flags. The mnt_stat structure may not be updated for
hours. Since the mount command requests mount details using the
MNT_NOWAIT option, it gets the mount's mnt_stat statfs structure
whose f_flags field does not yet show the MNT_QUOTA flag being set
in mnt_flag.
The fix is to have quotaon(8) set the MNT_QUOTA flag in both mnt_flag
and in mnt_stat.f_flags so that it will be immediately visible to
callers of statfs(2).
Reported by: Christos Chatzaras
Tested by: Christos Chatzaras
PR: 254682
MFC after: 3 days
Sponsored by: Netflix
Make it possible to reclaim items from a specific NUMA domain.
- Add uma_zone_reclaim_domain() and uma_reclaim_domain().
- Permit parallel reclamations. Use a counter instead of a flag to
synchronize with zone_dtor().
- Use the zone lock to protect cache_shrink() now that parallel reclaims
can happen.
- Add a sysctl that can be used to trigger reclamation from a specific
domain.
Currently the new KPIs are unused, so there should be no functional
change.
Reviewed by: mav
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D29685
Note that the per-domain variant does not shrink the target bucket size.
No functional change intended.
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Add global definitions for first-touch and interleave policies. The
former may be useful for UMA, which implements a similar policy without
using domainset iterators.
No functional change intended.
Reviewed by: mav
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D29104
Notable upstream pull request merges:
#11742 When specifying raidz vdev name, parity count should match
#11744 Use a helper function to clarify gang block size
#11771 Support running FreeBSD buildworld on Arm-based macOS hosts
This is the last update that will be MFCed into stable/13.
From now on, the tracking of OpenZFS branches will be different:
- main continues tracking openzfs/zfs/master
- stable/13 is going to track openzfs/zfs/zfs-2.1-release
Obtained from: OpenZFS
MFC after: 1 week
Found by: syzkaller
Reported and reviewed by: markj
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D29746
It is fine to drop the process lock there, process cannot exit until its
timers are cleared.
Found by: syzkaller
Reported and reviewed by: markj
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D29746
and length should be not less than SBUF_MINSIZE
Reported and tested by: pho
Noted and reviewed by: markj
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D29752
- Reuse some REDZONE bits to keep track of the requested and allocated
sizes, and use that to provide red zones.
- As in UMA, disable memory trashing to avoid unnecessary CPU overhead.
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D29461
We cache mapped execve argument buffers to avoid the overhead of TLB
shootdowns. Mark them invalid when they are freed to the cache.
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D29460
vnodes are a bit special in that they may exist on per-CPU lists even
while free. Add a KASAN-only destructor that poisons regions of each
vnode that are not expected to be accessed after a free.
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D29459
Memory allocated with kmem_* is unmapped upon free, so KASAN doesn't
provide a lot of benefit, but since allocations are always a multiple of
the page size we can create a redzone when the allocation request size
is not a multiple of the page size.
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D29458
We allocate kernel stacks using a UMA cache zone. Cache zones have
KASAN disabled by default, but in this case it makes sense to enable it.
Reviewed by: andrew
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D29457
- Add a UMA_ZONE_NOKASAN flag to indicate that items from a particular
zone should not be sanitized. This is applied implicitly for NOFREE
and cache zones.
- Add KASAN call backs which get invoked:
1) when a slab is imported into a keg
2) when an item is allocated from a zone
3) when an item is freed to a zone
4) when a slab is freed back to the VM
In state transitions 1 and 3, memory is poisoned so that accesses will
trigger a panic. In state transitions 2 and 4, memory is marked
valid.
- Disable trashing if KASAN is enabled. It just adds extra CPU overhead
to catch problems that are detected by KASAN.
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D29456
- Initialize KASAN before executing SYSINITs.
- Add a GENERIC-KASAN kernel config, akin to GENERIC-KCSAN.
- Increase the kernel stack size if KASAN is enabled. Some of the
ASAN instrumentation increases stack usage and it's enough to
trigger stack overflows in ZFS.
- Mark the trapframe as valid in interrupt handlers if it is
assigned to td_intr_frame. Otherwise, an interrupt in a function
which creates a poisoned alloca region can trigger false positives.
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D29455
The idea behind KASAN is to use a region of memory to track the validity
of buffers in the kernel map. This region is the shadow map. The
compiler inserts calls to the KASAN runtime for every emitted load
and store, and the runtime uses the shadow map to decide whether the
access is valid. Various kernel allocators call kasan_mark() to update
the shadow map.
Since the shadow map tracks only accesses to the kernel map, accesses to
other kernel maps are not validated by KASAN. UMA_MD_SMALL_ALLOC is
disabled when KASAN is configured to reduce usage of the direct map.
Currently we have no mechanism to completely eliminate uses of the
direct map, so KASAN's coverage is not comprehensive.
The shadow map uses one byte per eight bytes in the kernel map. In
pmap_bootstrap() we create an initial set of page tables for the kernel
and preloaded data.
When pmap_growkernel() is called, we call kasan_shadow_map() to extend
the shadow map. kasan_shadow_map() uses pmap_kasan_enter() to allocate
memory for the shadow region and map it.
Reviewed by: kib
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D29417
KASAN enables the use of LLVM's AddressSanitizer in the kernel. This
feature makes use of compiler instrumentation to validate memory
accesses in the kernel and detect several types of bugs, including
use-after-frees and out-of-bounds accesses. It is particularly
effective when combined with test suites or syzkaller. KASAN has high
CPU and memory usage overhead and so is not suited for production
environments.
The runtime and pmap maintain a shadow of the kernel map to store
information about the validity of memory mapped at a given kernel
address.
The runtime implements a number of functions defined by the compiler
ABI. These are prefixed by __asan. The compiler emits calls to
__asan_load*() and __asan_store*() around memory accesses, and the
runtime consults the shadow map to determine whether a given access is
valid.
kasan_mark() is called by various kernel allocators to update state in
the shadow map. Updates to those allocators will come in subsequent
commits.
The runtime also defines various interceptors. Some low-level routines
are implemented in assembly and are thus not amenable to compiler
instrumentation. To handle this, the runtime implements these routines
on behalf of the rest of the kernel. The sanitizer implementation
validates memory accesses manually before handing off to the real
implementation.
The sanitizer in a KASAN-configured kernel can be disabled by setting
the loader tunable debug.kasan.disable=1.
Obtained from: NetBSD
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D29416
LLVM support for enabling KASAN has not yet landed so the option is not
yet usable, but hopefully this will change soon.
Reviewed by: imp, andrew
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D29454
These comments were copied from dbg_monitor_enter(), but the intended
modifications weren't made. Update them to reflect what this code
actually does.
MFC after: 3 days
Sponsored by: The FreeBSD Foundation
This is both intuitive and required, as any previous breakpoint settings
may not be applicable to the new process.
Reported by: arichardson
Reviewed by: kib
MFC after: 3 days
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D29672
Since 7763814fc9 nfsrpc_setclient() uses mem_alloc() that is macro
around malloc(M_RPC). M_RPC is provided by xdr.ko.
Reviewed by: rmacklem
Sponsored by: Mellanox Technologies/NVidia Networking
MFC after: 1 week
This should be a no-op; the purpose of this is to reduce
a spurious difference between Linuxulator and Linux, to make
debugging core dumps slightly easier.
Note that AT_HWCAP2 we pass to Linux binaries is always 0,
instead of being equal to 'cpu_feature2'. This matches what
I've observed under Ubuntu Focal VM.
Reviewed By: chuck, dchagin
Sponsored By: EPSRC
Differential Revision: https://reviews.freebsd.org/D29609
MAP-E (RFC 7597) requires special care for selecting source ports
in NAT operation on the Customer Edge because a part of bits of the port
numbers are used by the Border Relay to distinguish another side of the
IPv4-over-IPv6 tunnel.
PR: 254577
Reviewed by: kp
Differential Revision: https://reviews.freebsd.org/D29468
A doomed VI does not have a valid ifnet.
Reported by: Jithesh Arakkan @ Chelsio
Reviewed by: np
MFC after: 1 week
Sponsored by: Chelsio Communications
Differential Revision: https://reviews.freebsd.org/D29662
There haven't been any non-obscure drivers that supported this
functionality and it has been impossible to test to ensure that it
still works. The only known consumer of this interface was the engine
in OpenSSL < 1.1. Modern OpenSSL versions do not include support for
this interface as it was not well-documented.
Reviewed by: cem
Sponsored by: Chelsio Communications
Differential Revision: https://reviews.freebsd.org/D29736
iscsid can be sleeping in iscsi_ioctl() causing the destroy_dev() to
sleep forever if iscsi.ko is unloaded while iscsid is running.
Reported by: Jithesh Arakkan @ Chelsio
Reviewed by: mav
MFC after: 1 week
Sponsored by: Chelsio Communications
Differential Revision: https://reviews.freebsd.org/D29688
Use .o files directly. Replace the .o.uu files that we uudecode with .o files.
Adjust the kernel and module build to cope.
Suggestions by: markj@, emaste@
Sposnored by: Netflix, Inc
Differential Revision: https://reviews.freebsd.org/D29636
uudecode the .o.uu files and commit directly to the tree. Adjust the build
infrastructure to cope with the new location, both for the kernel and modules.
Sposnored by: Netflix, Inc
Differential Revision: https://reviews.freebsd.org/D29635
Store the .o files directly in the tree. We no longer need to play uuencode
games like we did in the CVS days. Adjust the build infrastructure to match.
Reviewed by: markj@
Sposnored by: Netflix, Inc
Differential Revision: https://reviews.freebsd.org/D29634
We no longer need to use uuencode to uuencode files in our tree. Store the .o
file directly instead. Adjust the build to cope with the new arrangement.
Suggestions by: emaste, bz, donner
Reviewed by: markm
Sposnored by: Netflix, Inc
Differential Revision: https://reviews.freebsd.org/D29632
When packet is a SYN packet, we don't need to modify any existing PCB.
Normally SYN arrives on a listening socket, we either create a syncache
entry or generate syncookie, but we don't modify anything with the
listening socket or associated PCB. Thus create a new PCB lookup
mode - rlock if listening. This removes the primary contention point
under SYN flood - the listening socket PCB.
Sidenote: when SYN arrives on a synchronized connection, we still
don't need write access to PCB to send a challenge ACK or just to
drop. There is only one exclusion - tcptw recycling. However,
existing entanglement of tcp_input + stacks doesn't allow to make
this change small. Consider this patch as first approach to the problem.
Reviewed by: rrs
Differential revision: https://reviews.freebsd.org/D29576
Allows for duplicate locks to be acquired without witness complaining.
Similar flags exists already for rwlock(9) and sx(9).
Reviewed by: markj
MFC after: 3 days
Sponsored by: NetApp, Inc.
Sponsored by: Klara, Inc.
NetApp PR: 52
Differential Revision: https://reviews.freebsd.org/D29683n
types.h defines device_t as a typedef of struct device *. struct device
is defined in subr_bus.c and almost all of the kernel uses device_t.
The LinuxKPI also defines a struct device, so type confusion can occur.
This causes bugs and ambiguity for debugging tools. Rename the FreeBSD
struct device to struct _device.
Reviewed by: gbe (man pages)
Reviewed by: rpokala, imp, jhb
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D29676
We were passing a LinuxKPI struct device * to a pci(4) function that
expects a device_t.
Reviewed by: manu, hselasky, bz
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D29675
The driver needs to provide a LinuxKPI device structure to register
itself with the IB subsystem. It was erroneously using a copy of its
FreeBSD device structure for this purpose.
Use linux_pci_attach_device() instead, following the example of the
Chelsio iwarp driver. Also ensure that we don't leak the faked device
during detach.
Reviewed by: hselasky
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D29595
Once a kif is passed to pfi_kkif_attach() we must ensure we never re-use
it for anything else.
Set the kif to NULL afterwards to guarantee this.
Reported-by: syzbot+be5d4f4a7a4c295e659a@syzkaller.appspotmail.com
MFC after: 4 weeks
Sponsored by: Rubicon Communications, LLC ("Netgate")
It was used for testing armv6 under QEMU, however since then we added
support for the QEMU virt platform.
Reviewed by: imp, manu
Differential Revision: https://reviews.freebsd.org/D29707
This is intended to be used with memory mapped IO, e.g. from
bus_space_map with no flags, or pmap_mapdev.
Use this new memory type in the map request configured by
resource_init_map_request, and in pciconf.
Reviewed by: kib
Differential Revision: https://reviews.freebsd.org/D29692
The mbuf allocated could be a chain and must be freed with m_freem.
Reviewed by: jhb@
MFC after: 1 week
Sponsored by: Chelsio Communications
Differential Revision: https://reviews.freebsd.org/D29579
Recent testing of network partitioning a FreeBSD NFSv4.1
server from a Linux NFSv4.1 client identified problems
with both the FreeBSD server and Linux client.
Sometimes, after some Linux NFSv4.1/4.2 clients establish
a new TCP connection, they will advance the sequence number
for a session slot by 2 instead of 1.
RFC5661 specifies that a server should reply
NFS4ERR_SEQ_MISORDERED for this case.
This might result in a system call error in the client and
seems to disable future use of the slot by the client.
Since advancing the sequence number by 2 seems harmless,
allow this case if vfs.nfs.linuxseqsesshack is non-zero.
Note that, if the order of RPCs is actually reversed,
a subsequent RPC with a smaller sequence number value
for the slot will be received. This will result in
a NFS4ERR_SEQ_MISORDERED reply.
This has not been observed during testing.
Setting vfs.nfs.linuxseqsesshack to 0 will provide
RFC5661 compliant behaviour.
This fix affects the fairly rare case where a NFSv4
Linux client does a TCP reconnect and then apparently
erroneously increments the sequence number for the
session slot twice during the reconnect cycle.
PR: 254816
MFC after: 2 weeks
That fixes disabled keyboard input after Xorg server has been stopped.
Reviewed by: whu
MFC after: 1 month
Differential revision: https://reviews.freebsd.org/D28171
During a recent testing event, it was reported that the NFSv4.1/4.2
server erroneously bound the back channel to a new TCP connection.
RFC5661 specifies that the fore channel is implicitly bound to a
new TCP connection when an RPC with Sequence (almost any of them)
is done on it. For the back channel to be bound to the new TCP
connection, an explicit BindConnectionToSession must be done as
the first RPC on the new connection.
Since new TCP connections are created by the "reconnect" layer
(sys/rpc/clnt_rc.c) of the krpc, this patch adds an optional
upcall done by the krpc whenever a new connection is created.
The patch also adds the specific upcall function that does a
BindConnectionToSession and configures the krpc to call it
when required.
This is necessary for correct interoperability with NFSv4.1/NFSv4.2
servers when the nfscbd daemon is running.
If doing NFSv4.1/NFSv4.2 mounts without this patch, it is
recommended that the nfscbd daemon not be running and that
the "pnfs" mount option not be specified.
PR: 254840
Comments by: asomers
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D29475
Such type cannot be used in code that is in common between
FreeBSD and Linux. Use the FreeBSD type instead.
MFC after: 3 days
Reported by: markj
Differential Revision: https://reviews.freebsd.org/D29677
similarly to the Linux driver, by a tunable read only sysctl.
Submitted by: Oleg Sidorkin <osidorkin@gmail.com>
PR: 254884
MFC after: 1 week
Sponsored by: Mellanox Technologies // NVIDIA Networking
This is my second pass, this time over all of CAM except
for the SCSI target bits. There should be no functional
changes.
Reviewed By: imp
Sponsored by: NetApp, Inc.
Sponsored by: Klara, Inc.
Differential Revision: https://reviews.freebsd.org/D29549
Recent testing of network partitioning a FreeBSD NFSv4.1
server from a Linux NFSv4.1 client identified problems
with both the FreeBSD server and Linux client.
Commit 05a39c2c1c fixed replying with the cached reply in
in the session slot if same session slot sequence#.
However, the code uses the reply and, as such,
will fail for a subsequent retry of the RPC.
A subsequent retry would be an extremely rare event,
but this patch fixes this, so long as m_copym(..M_NOWAIT)
does not fail, which should also be a rare event.
This fix affects the exceedingly rare case where a NFSv4
client retries a non-idempotent RPC, such as a lock
operation, multiple times. Note that retries only occur
after the client has needed to create a new TCP connection,
with a new TCP connection for each retry.
MFC after: 2 weeks
Slighly relax the gateway validation rules imposed by the
2fe5a79425, by requiring only first 8 bytes (everyhing
before sdl_data to be present in the AF_LINK gateway.
Reported by: olivier
inp_lookup_mcast_ifp() is static and is only used in the inp_join_group().
The latter function is also static, and is only used in the inp_setmoptions(),
which relies on inp being non-NULL.
As a result, in the current code, inp_lookup_mcast_ifp() is always called
with non-NULL inp. Eliminate unused RT_DEFAULT_FIB condition and always
use inp fib instead.
Differential Revision: https://reviews.freebsd.org/D29594
Reviewed by: kp
MFC after: 2 weeks
These functions no longer exist in the kernel, so there's no reason to
keep the prototypes in a kernel header. Move them to pfctl where they're
actually implemented.
Reviewed by: glebius
MFC after: 4 weeks
Sponsored by: Rubicon Communications, LLC ("Netgate")
Differential Revision: https://reviews.freebsd.org/D29643
This will make future extensions of the API much easier.
The intent is to remove support for DIOCADDRULE in FreeBSD 14.
Reviewed by: markj (previous version), glebius (previous version)
MFC after: 4 weeks
Sponsored by: Rubicon Communications, LLC ("Netgate")
Differential Revision: https://reviews.freebsd.org/D29557
instead of manually inlining it
Reviewed by: jhb
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D29687
instead of manual zeroing of the debug registers file in pcb.
This centralizes the cleaning code, but the practical difference is
that PCB_DBREGS flag is cleared, saving some operations on context
switching.
Reviewed by: jhb
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D29687
Move the code from exec_setregs() to reset debug registers state on exec,
to the x86_clear_dbregs() helper
Reviewed by: jhb
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D29687
This way, even if the process specified very tight reschedule
intervals, it should be stoppable/killable.
Reported and reviewed by: markj
Tested by: markj, pho
Sponsored by: The FreeBSD Foundation
MFC after: 2 weeks
Differential revision: https://reviews.freebsd.org/D29106
The intent is to better handle time intervals with large amount of RIB
updates (e.g. BGP peer going up or down), while still keeping low sync
delay for the rest scenarios.
The implementation is the following: updates are bucketed into the
buckets of size 50ms. If the number of updates within a current bucket
exceeds the threshold of 500 routes/sec (e.g. 10 updates per bucket
interval), the update is delayed for another 50ms. This can be repeated
until the maximum update delay (1 sec) is reached.
All 3 variables are runtime tunables:
* net.route.algo.fib_max_sync_delay_ms: 1000
* net.route.algo.bucket_change_threshold_rate: 500
* net.route.algo.bucket_time_ms: 50
Differential Review: https://reviews.freebsd.org/D29588
MFC after: 2 weeks
The size of the ATU MEM/IO windows is implicitly casted to uint32_t.
Because of that some window sizes were silently demoted to 0 and ignored.
Check the size if its too large, trim it to 4GB and print a warning message.
Submitted by: Kornel Duleba <mindal@semihalf.com>
Reviewed by: mw
Obtained from: Semihalf
Sponsored by: Marvell
Differential revision: https://reviews.freebsd.org/D29625
It is all locked by the uppers' interlock.
Noted by: Alexander Lochmann <alexander.lochmann@tu-dortmund.de>
Sponsored by: The FreeBSD Foundation
MFC after: 3 days
Recent testing of network partitioning a FreeBSD NFSv4.1
server from a Linux NFSv4.1 client identified problems
with both the FreeBSD server and Linux client.
The FreeBSD server failec to reply using the cached
reply in the session slot when an RPC was retried on
the session slot, as indicated by same slot sequence#.
This patch fixes this. It should also fix a similar
failure for NFSv4.0 mounts, when the sequence# in
the open/lock_owner requires a reply be done from
an entry locked into the DRC.
This fix affects the fairly rare case where a NFSv4
client retries a non-idempotent RPC, such as a lock
operation. Note that retries only occur after the
client has needed to create a new TCP connection.
MFC after: 2 weeks
As other parts of the base tcp stack (eg.
tcp fastopen) already use jenkins_hash32,
and the properties appear reasonably good,
switching to use that.
Reviewed By: tuexen, #transport, ae
MFC after: 2 weeks
Sponsored by: NetApp, Inc.
Differential Revision: https://reviews.freebsd.org/D29515
looking to only read from the result, or to update it as well.
For now doesn't affect locking, but allows to push stats and expire
update into single place.
Reviewed by: rscheff
Add proper PRR vnet declarations for consistency.
Also add pointer to tcpopt struct to tcp_do_prr_ack, in preparation
for it to deal with non-SACK window reduction (after loss).
No functional change.
MFC after: 2 weeks
Reviewed By: tuexen, #transport
Sponsored by: NetApp, Inc.
Differential Revision: https://reviews.freebsd.org/D29440
A subtle oversight would subtly change new data packets
sent after a shutdown() or close() call, while the send
buffer is still draining.
MFC after: 3 days
Reviewed By: #transport, tuexen
Sponsored by: NetApp, Inc.
Differential Revision: https://reviews.freebsd.org/D29616
Following the analogous change for amd64 and i386 in 8223717ce6,
ensure that new processes start with these registers inactive.
PR: 254661
Reported by: Michał Górny
Reviewed by: kib, emaste
MFC after: 3 days
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D29630
The lower pmc event bits were masked off to find the PMC event ID.
The doesn't work when there are more events. Switch it to use the
offser relative to the first event while also checking the ID is
in the expected range.
Reviewed by: gnn, ray
Sponsored by: Innovate UK
Differential Revision: https://reviews.freebsd.org/D29600
When resetting the VFP state we need to discard any old state so we don't
try to save it on a context switch. Move this first so resetting the pcb
is safe to perform outside a critical section.
Reviewed by: arichardson
Sponsored by: Innovate UK
Differential Revision: https://reviews.freebsd.org/D29401
