RISC-V ISA specifies no cache management instructions so leave cache
operations in cpufunc.h as no-op for now.
Note some new hardware comes with their own memory-mapped cache
management controller.
Tested on HiFive Unleashed board with cgem(4).
Reviewed by: markj
Obtained from: arm64
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D20126
Multiple tools use @generated to identify generated files (for example,
in a review Phabricator will by default hide diffs in generated files).
Use the @generated tag in makeobjops.awk and vnode_if.awk as we've done
for other generated files.
Sponsored by: The FreeBSD Foundation
times - on every interrupt by using an own set of device methods for the
IGB class. This translates to introducing igb_if_intr_{disable,enable}()
and igb_if_{rx,tx}_queue_intr_enable() with that IGB-specific code moved
out of their EM counterparts and otherwise continuing to use the EM IFDI
methods also for IGB.
Note that igb_if_intr_{disable,enable}() also issue E1000_WRITE_FLUSH as
lost with the conversion of igb(4) to iflib(4).
Also note, that the em_if_{disable,enable}_intr() methods are renamed to
em_if_intr_{disable,enable}() for consistency with the names used in the
interface declaration.
o In em_intr():
- Don't bother to bail out if the interrupt type is "legacy", i. e. INTx
or MSI, as iflib(4) doesn't use ift_legacy_intr methods for MSI-X. All
other iflib(4)-based drivers avoid this check, too.
- Given that only the MSI-X interrupts have one-shot behavior (by taking
advantage of the EIAC register), explicitly disable interrupts. Hence,
em_intr() now matches what {em,igb}_irq_fast() previously did (in case
of igb(4) supposedly also to work around MSI message reordering errata
on certain systems).
o In em_if_intr_disable():
- Clear the EIAC register unconditionally for 82574 and not just in case
of MSI-X, matching em_if_intr_enable() and bringing back the last hunk
of r206437 lost with the iflib(4) conversion.
- Write to EM_EIAC for clearing said register instead of to the IGB-only
E1000_EIAC used ever since the iflib(4) conversion.
Reviewed by: shurd
Differential Revision: https://reviews.freebsd.org/D20176
MSI. Unlike as with iflib_fast_intr_ctx(), the former will also enqueue
_task_fn_tx() in addition to _task_fn_rx() if appropriate, bringing TCP
TX throughput of EM-class devices on par with the MSI-X case and, thus,
close to wirespeed/pre-iflib(4) times again. [1]
Note that independently of the interrupt type, the UDP performance with
these MACs still is abysmal and nowhere near to where it was before the
conversion of em(4) to iflib(4).
o In iflib_init_locked(), announce which free list failed to set up.
o In _task_fn_tx() when running netmap(4), issue ifdi_intr_enable instead
of the ifdi_tx_queue_intr_enable method in case of a "legacy" interrupt
as the latter is valid with MSI-X only.
o Instead of adding the missing - and apparently convoluted enough that a
DBG_COUNTER_INC was put into a wrong spot in _task_fn_rx() - checks for
ifdi_{r,t}x_queue_intr_enable being available in the MSI-X case also to
iflib_fast_intr_rxtx(), factor these out to iflib_device_register() and
make the checks fail gracefully rather than panic. This avoids invoking
the checks at runtime over and over again in iflib_fast_intr_rxtx() and
_task_fn_{r,t}x() - even if it's just in case of INVARIANTS - and makes
these functions more readable.
o In iflib_rx_structures_setup(), only initialize LRO resources if device
and driver have LRO capability in order to not waste memory. Also, free
the LRO resources again if setting them up fails for one of the queues.
However, don't bother invoking iflib_rx_sds_free() in that case because
iflib_rx_structures_setup() doesn't call iflib_rxsd_alloc() either (and
iflib_{device,pseudo}_register() will issue iflib_rx_sds_free() in case
of failure via iflib_rx_structures_free(), but there definitely is some
asymmetry left to be fixed, though).
o Similarly, free LRO resources again in iflib_rx_structures_free().
o In iflib_irq_set_affinity(), handle get_core_offset() errors gracefully
instead of panicing (but only in case of INVARIANTS). This is a follow-
up to r344132, as such driver bugs shouldn't be fatal.
o Likewise, handle unknown iflib_intr_type_t in iflib_irq_alloc_generic()
gracefully, too.
o Bring yet more sanity to iflib_msix_init():
- If the device doesn't provide enough MSI-X vectors or not all vectors
can be allocate so the expected number of queues in addition to admin
interrupts can't be supported, try MSI next (and then INTx) as proper
MSI-X vector distribution can't be assured in such cases. In essence,
this change brings r254008 forward to iflib(4). Also, this is the fix
alluded to in the commit message of r343934.
- If the MSI-X allocation has failed, don't prematurely announce MSI is
going to be used as the latter in fact may not be available either.
- When falling back to MSI, only release the MSI-X table resource again
if it was allocated in iflib_msix_init(), i. e. isn't supplied by the
driver, in the first place.
o In mp_ndesc_handler(), handle unknown type arguments gracefully, too.
PR: 235031 (likely) [1]
Reviewed by: shurd
Differential Revision: https://reviews.freebsd.org/D20175
resume where the last search left off. Suppose that there are no free
blocks of size 32, but plenty of size 16. If we repeatedly request
size 32 blocks, fail, and retry with size 16 blocks, then the failures
all reset the cursor to the beginning of memory, making the 16 block
allocation use a first fit, rather than next fit, strategy.
This change has blist_alloc make a copy of the cursor for its own
decision making, and only updates the real blist cursor after a
successful allocation, making those 16 block searches behave like
next-fit searches.
Approved by: markj (mentor)
Differential Revision: https://reviews.freebsd.org/D20177
- Remove the only ever written to ift_db_mtx_name member of struct iflib_txq.
- Remove the unused or only ever written to ifr_size, ifr_cq_pidx, ifr_cq_gen
and ifr_lro_enabled members of struct iflib_rxq.
- Consistently spell DMA, RX and TX uppercase in comments, messages etc.
instead of mixing with some lowercase variants.
- Consistently use if_t instead of a mix of if_t and struct ifnet pointers.
- Bring the function comments of _iflib_fl_refill(), iflib_rx_sds_free() and
iflib_fl_setup() in line with reality.
- Judging problem reports, people are wondering what on earth messages like:
"TX(0) desc avail = 1024, pidx = 0"
are trying to indicate. Thus, extend this string to be more like that of
non-iflib(4) Ethernet MAC drivers, notifying about a watchdog timeout due
to which the interface will be reset.
- Take advantage of the M_HAS_VLANTAG macro.
- Use false/true rather than FALSE/TRUE for variables of type bool.
- Use FALLTHROUGH as advocated by style(9).
Only two interfaces are created eth0 and lo and they expose
the following properties:
address, addr_len, flags, ifindex, mty, tx_queue_len and type.
Initial patch developed by Carlos Neira in 2017 and finished by me.
PR: 223722
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D13656
a final revision.
Fix style issues and change bool-like variables from int to bool.
Reviewed by: emaste
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D20141
Allow users to specify multiple dump configurations in a prioritized list.
This enables fallback to secondary device(s) if primary dump fails. E.g.,
one might configure a preference for netdump, but fallback to disk dump as a
second choice if netdump is unavailable.
This change does not list-ify netdump configuration, which is tracked
separately from ordinary disk dumps internally; only one netdump
configuration can be made at a time, for now. It also does not implement
IPv6 netdump.
savecore(8) is already capable of scanning and iterating multiple devices
from /etc/fstab or passed on the command line.
This change doesn't update the rc or loader variables 'dumpdev' in any way;
it can still be set to configure a single dump device, and rc.d/savecore
still uses it as a single device. Only dumpon(8) is updated to be able to
configure the more complicated configurations for now.
As part of revving the ABI, unify netdump and disk dump configuration ioctl
/ structure, and leave room for ipv6 netdump as a future possibility.
Backwards-compatibility ioctls are added to smooth ABI transition,
especially for developers who may not keep kernel and userspace perfectly
synced.
Reviewed by: markj, scottl (earlier version)
Relnotes: maybe
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D19996
As Linux comment for this function point:
Signal to the system that the PCI device is not in use by the system
anymore. This only involves disabling PCI bus-mastering, if active.
Build tested drm-current-kmod prior to commit.
MFC after: 1 week
Submitted by: slavash@
Sponsored by: Mellanox Technologies
Equivalent to r339958 for sys/kern/syscalls.master.
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D14858
Turning on pr_debug at compile time make it non-optional at runtime.
This often means that the amount of the debugging is unbearable.
Allow developer to turn on pr_debug output only when needed.
Build tested drm-current-kmod prior to commit.
MFC after: 1 week
Submitted by: kib@
Sponsored by: Mellanox Technologies
There's a race between the initialization of devsoftc.mtx (by devinit)
and the creation of the geom worker thread g_run_events, which calls
devctl_queue_data_f. Both of those are initialized at SI_SUB_DRIVERS
and SI_ORDER_FIRST, which means the geom worked thread can be created
before the mutex has been initialized, leading to the panic below:
wpanic: mtx_lock() of spin mutex (null) @ /usr/home/osstest/build.135317.build-amd64-freebsd/freebsd/sys/kern/subr_bus.c:620
cpuid = 3
time = 1
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe003b968710
vpanic() at vpanic+0x19d/frame 0xfffffe003b968760
panic() at panic+0x43/frame 0xfffffe003b9687c0
__mtx_lock_flags() at __mtx_lock_flags+0x145/frame 0xfffffe003b968810
devctl_queue_data_f() at devctl_queue_data_f+0x6a/frame 0xfffffe003b968840
g_dev_taste() at g_dev_taste+0x463/frame 0xfffffe003b968a00
g_load_class() at g_load_class+0x1bc/frame 0xfffffe003b968a30
g_run_events() at g_run_events+0x197/frame 0xfffffe003b968a70
fork_exit() at fork_exit+0x84/frame 0xfffffe003b968ab0
fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe003b968ab0
--- trap 0, rip = 0, rsp = 0, rbp = 0 ---
KDB: enter: panic
[ thread pid 13 tid 100029 ]
Stopped at kdb_enter+0x3b: movq $0,kdb_why
Fix this by initializing geom at SI_ORDER_SECOND instead of
SI_ORDER_FIRST.
Sponsored by: Citrix Systems R&D
Reviewed by: kevans, markj
Differential revision: https://reviews.freebsd.org/D20148
The more appropriate place to do the flushing is VOP_OPEN(). This was
uncovered because VOP_SET_TEXT() is now called with the vnode'
vm_object rlocked, which is incompatible with the flush operations.
After the move, there is no need for NFS-specific VOP_SET_TEXT
overload.
Sponsored by: The FreeBSD Foundation
MFC after: 30 days
Since the DMAP is only available on powerpc64, and is *always* available on
Book-E powerpc64, don't penalize either side (32-bit or 64-bit) by always
checking hw_direct_map to perform operations. This saves 5-10% time on
various ports builds, and on buildworld+buildkernel on Book-E hardware.
MFC after: 3 weeks
Use the nitems() macro instead of the expansion, a'la r298352. Also, fix the
location of this check to after initializing availmem_regions_sz, so that the
check isn't always against 0, thus always failing (nitems(phys_avail) is always
more than 0).
kern_execve() locks text vnode exclusive to be able to set and clear
VV_TEXT flag. VV_TEXT is mutually exclusive with the v_writecount > 0
condition.
The change removes VV_TEXT, replacing it with the condition
v_writecount <= -1, and puts v_writecount under the vnode interlock.
Each text reference decrements v_writecount. To clear the text
reference when the segment is unmapped, it is recorded in the
vm_map_entry backed by the text file as MAP_ENTRY_VN_TEXT flag, and
v_writecount is incremented on the map entry removal
The operations like VOP_ADD_WRITECOUNT() and VOP_SET_TEXT() check that
v_writecount does not contradict the desired change. vn_writecheck()
is now racy and its use was eliminated everywhere except access.
Atomic check for writeability and increment of v_writecount is
performed by the VOP. vn_truncate() now increments v_writecount
around VOP_SETATTR() call, lack of which is arguably a bug on its own.
nullfs bypasses v_writecount to the lower vnode always, so nullfs
vnode has its own v_writecount correct, and lower vnode gets all
references, since object->handle is always lower vnode.
On the text vnode' vm object dealloc, the v_writecount value is reset
to zero, and deadfs vop_unset_text short-circuit the operation.
Reclamation of lowervp always reclaims all nullfs vnodes referencing
lowervp first, so no stray references are left.
Reviewed by: markj, trasz
Tested by: mjg, pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 month
Differential revision: https://reviews.freebsd.org/D19923
NOSPLIT swap objects are not anonymous, they are used by tmpfs regular
files and POSIX shared memory. For such objects, collapse is not
permitted.
Reported by: mjg
Reviewed by: markj, trasz
Tested by: mjg, pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D19923
We unlock the vnode around malloc(M_WAITOK), to make it possible for
pagedaemon to flush vnode pages for us. Instead of doing it
unconditionally, first try M_NOWAIT allocation, which typically
succeed. Only on failure, unlock the vnode and retry with M_WAITOK.
Reviewed by: markj, trasz
Tested by: mjg, pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D19923
Right now ath_rate_sample has a fixed rate schedule, rather than the minstrel_ht
style "best, good, most reliable" triplet. So, if higher rates are tried then
it'll not fail back to a lower MCS rate in that transmission schedule.
This means that in low SNR situations it'll not easily drop to MCS0 unless enough
transmissions occur to allow rate control to eventually decide to drop; and if
it's TCP traffic it'll get slowed down because of packet loss.
It's worse for 2-stream and 3-stream rates; it doesn't ever fall back to lower
stream rates, and these higher stream rates required higher SNR to work.
So instead let's (for now?) have each of the 11n transmit rates use MCS0 as
the last attempt. ath_rate_sample will quickly see that rate succeeds more
and will move to it much quicker.
Testing:
* AR9344 (Wasp) - 2G STA mode
These are some fun issues I've found with my upstairs wifi link at such a ridiculous
low signal level (like, < 5dB.)
* Add per-station tx/rx rssi statistics, in potential preparation to use that
in the RX rate control.
* Call the rate control on each received frame to let it potentially use
it as a hint for what rates to potentially use. It's a no-op right now.
* Do ANI calibration during scan as well. The ath_newstate() call was disabling the
ANI timer and only re-enabling it during transitions to _RUN. This has the
unfortunate side-effect that if ANI deafened the NIC because of interference
and it disassociated, it wouldn't be reset and the scan would never hear beacons.
The ANI configuration is stored at least globally on some HALs and per-channel
on others. Because of this a NIC reset wouldn't help; the ANI parameters would
simply be programmed back in.
Now, I have a feeling I also need to do this during AUTH/ASSOC too and maybe,
if I'm feeling clever, I need to reset the ANI parameters on a given channel
during a transition through INIT or if the VAP is destroyed/re-created.
However for now this gets me out of the immediate weeds with connectivity
upstairs (and thus I /can/ commit); I'll keep chipping away at tidying this
stuff up in subsequent commits.
Tested:
* AR9344 (Wasp), 2G STA mode
IPI_STOP is used after panic or when ddb is entered manually. MONITOR/
MWAIT allows CPUs that support the feature to sleep in a low power way
instead of spinning. Something similar is already used at idle.
It is perhaps especially useful in oversubscribed VM environments, and is
safe to use even if the panic/ddb thread is not the BSP. (Except in the
presence of MWAIT errata, which are detected automatically on platforms with
known wakeup problems.)
It can be tuned/sysctled with "machdep.stop_mwait," which defaults to 0
(off). This commit also introduces the tunable
"machdep.mwait_cpustop_broken," which defaults to 0, unless the CPU has
known errata, but may be set to "1" in loader.conf to signal that mwait
wakeup is broken on CPUs FreeBSD does not yet know about.
Unfortunately, Bhyve doesn't yet support MONITOR extensions, so this doesn't
help bhyve hypervisors running FreeBSD guests.
Submitted by: Anton Rang <rang AT acm.org> (earlier version)
Reviewed by: kib
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D20135
Rather than just accessing it via pointer cast.
No functional change intended.
Discussed with: kib (earlier version)
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D20135
The S/G list must be mapped AS-IS without any optimisations.
This also implies that sg_dma_len() must be equal to sg->length.
Many Linux drivers assume this and this fixes some DRM issues.
Put the BUS DMA map pointer into the scatter-gather list to
allow multiple mappings on the same physical memory address.
The FreeBSD version has been bumped to force recompilation of
external kernel modules.
Sponsored by: Mellanox Technologies
Summary:
A few ports fail to build due to missing pmap-related definitions, which are
specific per-pmap type. This tries to appease those ports, by merging all
pmaps together.
A future change will move the inline page directory out of the Book-E pmap,
to eliminate the last #ifdefs in pmap.h and complete the merge.
Reviewed By: luporl
Differential Revision: https://reviews.freebsd.org/D20119
directory entries that is caused by uninitialized directory entry
padding written to the disk. It can be viewed by any user with read
access to that directory. Up to 3 bytes of kernel stack are disclosed
per file entry, depending on the the amount of padding the kernel
needs to pad out the entry to a 32 bit boundry. The offset in the
kernel stack that is disclosed is a function of the filename size.
Furthermore, if the user can create files in a directory, this 3
byte window can be expanded 3 bytes at a time to a 254 byte window
with 75% of the data in that window exposed. The additional exposure
is done by removing the entry, creating a new entry with a 4-byte
longer name, extracting 3 more bytes by reading the directory, and
repeating until a 252 byte name is created.
This exploit works in part because the area of the kernel stack
that is being disclosed is in an area that typically doesn't change
that often (perhaps a few times a second on a lightly loaded system),
and these file creates and unlinks themselves don't overwrite the
area of kernel stack being disclosed.
It appears that this bug originated with the creation of the Fast
File System in 4.1b-BSD (Circa 1982, more than 36 years ago!), and
is likely present in every Unix or Unix-like system that uses
UFS/FFS. Amazingly, nobody noticed until now.
This update also adds the -z flag to fsck_ffs to have it scrub
the leaked information in the name padding of existing directories.
It only needs to be run once on each UFS/FFS filesystem after a
patched kernel is installed and running.
Submitted by: David G. Lawrence <dg@dglawrence.com>
Reviewed by: kib
MFC after: 1 week
OVMF's flash variable storage is using add instructions when indexing
the variable store bootrom location.
Submitted by: D Scott Phillips <d.scott.phillips@intel.com>
Reviewed by: rgrimes
MFC after: 1 week
Sponsored by: Intel Corporation
Differential Revision: https://reviews.freebsd.org/D19975
lock mac_ifnet_mtx, which protects labels on struct ifnet, unless at least
one policy is actively using labels on ifnets. This avoids a global mutex
acquire in certain fast paths -- most noticeably ifnet transmit. This was
previously invisible by default, as no MAC policies were loaded by default,
but recently became visible due to mac_ntpd being enabled by default.
gallatin@ reports a reduction in PPS overhead from 300% to 2.2% with this
change. We will want to explore further MAC Framework optimisation to
reduce overhead further, but this brings things more back into the world
of the sane.
MFC after: 3 days
This change creates an array of port maps indexed by numa domain
for lacp port selection. If we have lacp interfaces in more than
one domain, then we select the egress port by indexing into the
numa port maps and picking a port on the appropriate numa domain.
This is behavior is controlled by the new ifconfig use_numa flag
and net.link.lagg.use_numa sysctl/tunable (both modeled after the
existing use_flowid), which default to enabled.
Reviewed by: bz, hselasky, markj (and scottl, earlier version)
Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D20060
move bits that are MI out into the headers in compat/linux.
For that remove bogus _packed attribute from struct l_sockaddr
and use MI types for struct members.
And continue to move into the linux_common module a code that is
intended for both Linuxulator modules (both instruction set - 32 & 64 bit)
or for external modules like linsysfs or linprocfs.
To avoid header pollution introduce new sys/compat/linux_common.h header.
Reviewed by: emaste
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D20137
linear search can, so use it to avoid a linear search in isqrt.
Approved by: kib (mentor), markj (mentor)
Differential Revision: https://reviews.freebsd.org/D20102
It's atypical, but not invalid, for a driver to pass no capabilities.
Submitted by: Gerald Aryeetey <aryeeteygerald_rogers.com>
Reviewed by: shurd
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D20142
Use it wherever COMPAT_FREEBSD11 is currently specified, like r309749.
Reviewed by: imp, jhb, markj
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D20120
The DTS for this board is already present in sys/gnu/dts/arm64/rockchip/
and just needs to be enabled.
Submitted by: alex@wied.io
Differential Revision: https://reviews.freebsd.org/D19823
r345519 rewrote parts of how we build .dtb, but mistakenly dropped the
vendor dir for aarch64. Simply drop the :T for building ${DTB} in the
aarch64 case- it'll get applied at install-time as-needed, with :H:T for
determining the vendor dir.
Reported by: manu
Tested by: manu
Reviewed by: manu
MFC after: 3 days
That makes Linux lscpu(1) work.
Reviewed by: dchagin
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D20131
It's possible for a Hypervisor Maintenance Interrupt (HMI) to occur while in
the pmap code, holding locks. This can cause WITNESS to panic due to lock
errors in calling pmap_kextract(). Since we don't yet handle the flags
returned by OPAL_HANDLE_HMI2, just stop using it, so that we don't call into
pmap_kextract().
Reported by: pkubaj
Some UEFI implementations trash this register and, as we use it as a
platform register, the kernel doesn't save it before calling into the UEFI
runtime services. As we have a copy in tpidr_el1 restore from there when
exiting the EFI environment.
PR: 237234, 237055
Reviewed by: manu
Tested On: Ampere eMAG
MFC after: 2 weeks
Sponsored by: DARPA, AFRL
Sponsored by: Ampere Computing (hardware)
Differential Revision: https://reviews.freebsd.org/D20127
vm_map_wire() increments entry->wire_count, after that it drops the
map lock both for faulting in the entry' pages, and for marking next
entry in the requested region as IN_TRANSITION. Only after all entries
are faulted in, MAP_ENTRY_USER_WIRE flag is set.
This makes it possible for vm_map_protect() to run while other entry'
MAP_ENTRY_IN_TRANSITION flag is handled, and vm_map_busy() lock does
not prevent it. In particular, if the call to vm_map_protect() adds
VM_PROT_WRITE to CoW entry, it would fail to call
vm_fault_copy_entry(). There are at least two consequences of the
race: the top object in the shadow chain is not populated with
writeable pages, and second, the entry eventually get contradictory
flags MAP_ENTRY_NEEDS_COPY | MAP_ENTRY_USER_WIRED with VM_PROT_WRITE
set.
Handle it by waiting for all MAP_ENTRY_IN_TRANSITION flags to go away
in vm_map_protect(), which does not drop map lock afterwards. Note
that vm_map_busy_wait() is left as is.
Reported and tested by: pho (previous version)
Reviewed by: Doug Moore <dougm@rice.edu>, markj
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D20091
Make function macro wrappers for locking and unlocking to ease readability.
No functional change.
Discussed with: kib@, tychon@ and zeising@
Sponsored by: Mellanox Technologies
Unconditional writing to MAS7, which doesn't exist on the e500v1 core, in a
TLB miss handler has been in the code for several years now. Since this has
gone unnoticed for so long, it's easily concluded that e500v1 is not in use
with FreeBSD. Simplify the code path a bit, by unconditionally zeroing MAS7
instead of calling a subroutine to do it.
r18 is used to hold the old PCB flags, but cpu_throw doesn't populate r18
with PCB flags, since the old thread is gone. This can lead to panics on
cores that don't have the registers guarded by these flags.
This version fixes the problems identified in r345244.
Reviewed by: kib
MFC after: 1 month
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D19598
Turning on multicast debug made multicast failure worse
because the strings and #define values no longer matched
up. Fix them, and make sure they stay matched-up.
Submitted by: torek
MFC after: 1 week
Sponsored by: iXsystems, Inc.
This change makes it easier to enable/disable the inclusion of
OPAL flash in the kernel.
Reviewed by: jhibbits
Differential Revision: https://reviews.freebsd.org/D20098
so it does not require a bounce buffer. The only need for this was
to align the buffer address. Implement unaligned access and we don't
need to copy data twice.
o Remove contigmalloc-based bounce buffer from xDMA code since it is
not suitable for arbitrary memory provided by platform, which is
sometimes a dedicated piece of memory that is not managed by OS at all.
Sponsored by: DARPA, AFRL
These predicates are vestigal and cannot be true today. For example,
idle threads are not allowed to acquire locks.
Also cache curthread in breada().
No functional change intended.
Reviewed by: kib, mckusick
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D20066
This way its children can attach earlier if needed, and some subsystems are
attached earlier, like the asynchronous token management.
MFC after: 2 weeks
It cannot load it automatically at boot, because the root filesystem
is not there yet. An alternative would be adding ispfw(4) to GENERIC,
but it's an additional 1MB.
Reviewed by: mav
MFC after: 2 weeks
Sponsored by: Klara Inc.
Differential Revision: https://reviews.freebsd.org/D19369
Add support to enable, save, and restore the following facilities:
* Target Address Register (bctar) -- seemingly just another register to
branch to.
* Event-based branching -- an interrupt-like userspace event handler
subsystem.
* Load-monitored facility -- A facility that allows monitoring a range of
physical memory, and triggering an event on access. Targeted to garbage
collection software features.
The Data Stream Control Register (DSCR) is privileged on POWER7, but
unprivileged (different register) on POWER8 and later. However, it's now
guarded by a new register, the Facility Status and Control Register, instead of
the MSR like other pre-existing facilities (FPU, Altivec). The FSCR must be
managed explicitly, since it's effectively an extension of the MSR.
Tested by: Brandon Bergren
We don't have the display engine driver commited in FreeBSD yet so it is
useless to expose the clocks yet (and also it have not been tested on H5).
Reported by: Manuel Stühn (freebsdnewbie@freenet.de)
PR: 237571
MFC after: 1 week
Allwinner H3 and H5 share many internal components, that's why they can
use the same drivers.
This patch adds the compatible strings to enable clock drivers
probing on Allwinner NanoPI NEO2 device.
Tested on: NanoPi NEO2 (by submitter), OrangePi PC2 (by manu)
Submitted by: Manuel Stühn (freebsdnewbie@freenet.de)
MFC after: 2 months
Differential Revision: https://reviews.freebsd.org/D20069
The POWER8NVL (POWER8 NVLink) architecturally behaves identically to the
POWER8, with a different PVR identifier. Mark it as such, so it shows up
appropriately to the user.
Reported by: Alexey Kardashevskiy
MFC after: 2 weeks
Since the non-volatile registers are restored at the end of cpu_switchin (of
the new thread) they're free for us to use for our own purposes. Load the
PCB_FLAGS into a non-volatile register so it's preserved across the C
function calls that manage FPU and altivec state. This removes 4 loads from
each file. Might be a trivial performance improvement (~12 clock cycles per
context switch).
MFC after: 3 weeks
Some PPC systems (PowerNV) use msdosfs for /boot, which can't handle either
symlinks or hardlinks. So on PPC, copy the module instead. This change fixes
installkernel on such systems after r345350.
Reported by: Brandon Bergren <git_bdragon.rtk0.net>
Reviewed by: jhibbits, rgrimes
MFC after: 2 weeks
MFC-With: 345350, 346441
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D19993
Replace most VM_MAXCPU constant useses with an accessor function to
vm->maxcpus which for now is initialized and kept at the value of
VM_MAXCPUS.
This is a rework of Fabian Freyer (fabian.freyer_physik.tu-berlin.de)
work from D10070 to adjust it for the cpu topology changes that
occured in r332298
Submitted by: Fabian Freyer (fabian.freyer_physik.tu-berlin.de)
Reviewed by: Patrick Mooney <patrick.mooney@joyent.com>
Approved by: bde (mentor), jhb (maintainer)
MFC after: 3 days
Differential Revision: https://reviews.freebsd.org/D18755
By default, cores are now assigned to queues in a sequential
manner rather than all NICs starting at the first core. On a four-core
system with two NICs each using two queue pairs, the nic:queue -> core
mapping has changed from this:
0:0 -> 0, 0:1 -> 1
1:0 -> 0, 1:1 -> 1
To this:
0:0 -> 0, 0:1 -> 1
1:0 -> 2, 1:1 -> 3
Additionally, a device can now be configured to use separate cores for TX
and RX queues.
Two new tunables have been added, dev.X.Y.iflib.separate_txrx and
dev.X.Y.iflib.core_offset. If core_offset is set, the NIC is not part
of the auto-assigned sequence.
Reviewed by: marius
MFC after: 2 weeks
Sponsored by: Limelight Networks
Differential Revision: https://reviews.freebsd.org/D20029
Contrary to the comments, it was never used by core dumps or
debuggers. Instead, it used to hold the signal code of a pending
signal, but that was replaced by the 'ksi_code' member of ksiginfo_t
when signal information was reworked in 7.0.
Reviewed by: kib
Differential Revision: https://reviews.freebsd.org/D20047
Otherwise tap(4) can be loaded by loader despite being compiled into the
kernel, causing a panic as things try to double-initialize.
PR: 220867
MFC after: 3 days
Drivers can now pass up numa domain information via the
mbuf numa domain field. This information is then used
by TCP syncache_socket() to associate that information
with the inpcb. The domain information is then fed back
into transmitted mbufs in ip{6}_output(). This mechanism
is nearly identical to what is done to track RSS hash values
in the inp_flowid.
Follow on changes will use this information for lacp egress
port selection, binding TCP pacers to the appropriate NUMA
domain, etc.
Reviewed by: markj, kib, slavash, bz, scottl, jtl, tuexen
Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D20028
Previously, a pid check was used to prevent open of the tun(4); this works,
but may not make the most sense as we don't prevent the owner process from
opening the tun device multiple times.
The potential race described near tun_pid should not be an issue: if a
tun(4) is to be handed off, its fd has to have been sent via control message
or some other mechanism that duplicates the fd to the receiving process so
that it may set the pid. Otherwise, the pid gets cleared when the original
process closes it and you have no effective handoff mechanism.
Close up another potential issue with handing a tun(4) off by not clobbering
state if the closer isn't the controller anymore. If we want some state to
be cleared, we should do that a little more surgically.
Additionally, nothing prevents a dying tun(4) from being "reopened" in the
middle of tun_destroy as soon as the mutex is unlocked, quickly leading to a
bad time. Return EBUSY if we're marked for destruction, as well, and the
consumer will need to deal with it. The associated character device will be
destroyed in short order.
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D20033
It seems that there should be a better way to handle this, but this seems to
be the more common approach and it should likely get replaced in all of the
places it happens... Basically, thread 1 is in the process of destroying the
tun/tap while thread 2 is executing one of the ioctls that requires the
tun/tap mutex and the mutex is destroyed before the ioctl handler can
acquire it.
This is only one of the races described/found in PR 233955.
PR: 233955
Reviewed by: ae
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D20027
The <sys/pctrie.h> APIs expect a 64-bit DMA key.
This is fine as long as the DMA is less than or equal to 64 bits, which
is currently the case.
Sponsored by: Mellanox Technologies
From 7d8dc6544c
"The mcbin (and likely others) have a nonstandard uart clock. This means
that the earlycon programming will incorrectly set the baud rate if it is
specified. The way around this is to tell the kernel to continue using the
preprogrammed baud rate. This is done by setting the baud to 0."
Our drivers (uart_dev_ns8250) do respect zero, but SPCR would error. Let's
not error.
Submitted by: Greg V <greg@unrelenting.technology>
Reviewed by: mw, imp, bcran
Differential Revision: https://reviews.freebsd.org/D19914
This is fairly similar to the AES-GCM support in ccr(4) in that it will
fall back to software for certain cases (requests with only AAD and
requests that are too large).
Tested by: cryptocheck, cryptotest.py
MFC after: 1 month
Sponsored by: Chelsio Communications
A request to encrypt an empty payload without any AAD is unusual, but
it is defined behavior. Removing this assertion removes a panic and
instead returns the correct tag for an empty buffer.
Reviewed by: cem, sef
MFC after: 2 weeks
Sponsored by: Chelsio Communications
Differential Revision: https://reviews.freebsd.org/D20043
To workaround limitations in the crypto engine, empty buffers are
handled by manually constructing the final length block as the payload
passed to the crypto engine and disabling the normal "final" handling.
For HMAC this length block should hold the length of a single block
since the hash is actually the hash of the IPAD digest, but for
"plain" SHA the length should be zero instead.
Reported by: NIST SHA1 test failure
MFC after: 2 weeks
Sponsored by: Chelsio Communications
Add support for newer Thinkpad models with id LEN0268. Was tested on
Thinkpad T480 and ThinkPad X1 Yoga 2nd gen.
PR: 229120
Submitted by: Ali Abdallah <aliovx@gmail.com>
MFC after: 1 week
destroy_dev_sched_cb() is excessively asynchronous, and during media change
retaste new provider may appear sooner then device of the previous one get
destroyed.
MFC after: 1 week
Sponsored by: iXsystems, Inc.
We may need the BSP to reboot, but we don't need any AP CPU that isn't the
panic thread. Any CPU landing in this routine during panic isn't the panic
thread, so we can just detect !BSP && panic and shut down the logical core.
The savings can be demonstrated in a bhyve guest with multiple cores; before
this change, N guest threads would spin at 100% CPU. After this change,
only one or two threads spin (depending on if the panicing CPU was the BSP
or not).
Konstantin points out that this may break any future patches which allow
switching ddb(4) CPUs after panic and examining CPU-local state that cannot
be inspected remotely. In the event that such a mechanism is incorporated,
this behavior could be made configurable by tunable/sysctl.
Reviewed by: kib
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D20019
As with mlx5en, the idea is to drop unwanted traffic as early
in receive as possible, before mbufs are allocated and anything
is passed up the stack. This can save considerable CPU time
when a machine is under a flooding style DOS attack.
The major change here is to remove the unneeded abstraction where
callers of rxd_frag_to_sd() get back a pointer to the mbuf ring, and
are responsible for NULL'ing that mbuf themselves. Now this happens
directly in rxd_frag_to_sd(), and it returns an mbuf. This allows us
to use the decision (and potentially mbuf) returned by the pfil
hooks. The driver can now recycle mbufs to avoid re-allocation when
packets are dropped.
Reviewed by: marius (shurd and erj also provided feedback)
Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D19645
This GRE-in-UDP encapsulation allows the UDP source port field to be
used as an entropy field for load-balancing of GRE traffic in transit
networks. Also most of multiqueue network cards are able distribute
incoming UDP datagrams to different NIC queues, while very little are
able do this for GRE packets.
When an administrator enables UDP encapsulation with command
`ifconfig gre0 udpencap`, the driver creates kernel socket, that binds
to tunnel source address and after udp_set_kernel_tunneling() starts
receiving of all UDP packets destined to 4754 port. Each kernel socket
maintains list of tunnels with different destination addresses. Thus
when several tunnels use the same source address, they all handled by
single socket. The IP[V6]_BINDANY socket option is used to be able bind
socket to source address even if it is not yet available in the system.
This may happen on system boot, when gre(4) interface is created before
source address become available. The encapsulation and sending of packets
is done directly from gre(4) into ip[6]_output() without using sockets.
Reviewed by: eugen
MFC after: 1 month
Relnotes: yes
Differential Revision: https://reviews.freebsd.org/D19921
mtmsr and mtsr require context synchronizing instructions to follow. Without
a CSI, there's a chance for a machine check exception. This reportedly does
occur on a MPC750 (PowerMac G3).
Reported by: Mark Millard
r346307 inadvertently started installing FDT_DTS_FILE along with the kernel.
While this isn't necessarily bad, it was not intended or discussed and it
actively breaks some current setups that don't anticipate any .dtb being
installed when it's using static fdt. This change could be reconsidered down
the line, but it needs to be done with prior discussion.
Fix it by pushing FDT_DTS_FILE build down into the raw dtb.build.mk bits.
This technically allows modules building DTS to accidentally specify an
FDT_DTS_FILE that gets built but isn't otherwise useful (since it's not
installed), but I suspect this isn't a big deal and would get caught with
any kind of testing -- and perhaps this might end up useful in some other
way, for example by some module wanting to embed fdt in some other way than
our current/normal mechanism.
Reported by: Mori Hiroki <yamori813@yahoo.co.jp>
MFC after: 3 days
X-MFC-With: r346307
tun destruction will not continue until TUN_OPEN is cleared. There are brief
moments in tunclose where the mutex is dropped and we've already cleared
TUN_OPEN, so tun_destroy would be able to proceed while we're in the middle
of cleaning up the tun still. tun_destroy should be blocked until these
parts (address/route purges, mostly) are complete.
PR: 233955
MFC after: 2 weeks
If kern.random.initial_seeding.bypass_before_seeding is disabled, random(4)
and arc4random(9) will block indefinitely until enough entropy is available
to initially seed Fortuna.
It seems that zero flowids are perfectly valid, so avoid blocking on random
until initial seeding takes place.
Discussed with: bz (earlier revision)
Reviewed by: thj
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D20011
As mphyp_pte_unset() can also remove PTE entries, and as this can
happen in parallel with PTEs evicted by mphyp_pte_insert(), there
is a (rare) chance the PTE being evicted gets removed before
mphyp_pte_insert() is able to do so. Thus, the KASSERT should
check wether the result is H_SUCCESS or H_NOT_FOUND, to avoid
panics if the situation described above occurs.
More details about this issue can be found in PR 237470.
PR: 237470
Reviewed by: jhibbits
Differential Revision: https://reviews.freebsd.org/D20012
Tested by Greg V with mlx5en on an Ampere eMAG instance at Packet.com on
c2.large.arm (with some additional uncommitted PCIe WIP).
PR: 237055
Submitted by: Greg V <greg@unrelenting.technology>
Reviewed by: hselasky
MFC after: 1 month
Differential Revision: https://reviews.freebsd.org/D19983
RFC 4391 specifies that the IB interface GID should be re-used as IPv6
link-local address. Since the code in in6_get_hw_ifid() ignored
IFT_INFINIBAND case, ibX interfaces ended up with the local address
borrowed from some other interface, which is non-compliant.
Use lowest eight bytes from GID for filling the link-local address,
same as Linux.
Reviewed by: bz (previous version), ae, hselasky, slavash,
Sponsored by: Mellanox Technologies
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D20006
In r297225 the initial INP_RLOCK() was replaced by an early
acquisition of an r- or w-lock depending on input variables
possibly extending the write locked area for reasons not entirely
clear but possibly to avoid a later case of unlock and relock
leading to a possible race condition and possibly in order to
allow the route cache to work for connected sockets.
Unfortunately the conditions were not 1:1 replicated (probably
because of the route cache needs). While this would not be a
problem the legacy IP code compared to IPv6 has an extra case
when dealing with IP_SENDSRCADDR. In a particular case we were
holding an exclusive inp lock and acquired the shared udbinfo
lock (now epoch).
When then running into an error case, the locking assertions
on release fired as the udpinfo and inp lock levels did not match.
Break up the special case and in that particular case acquire
and udpinfo lock depending on the exclusitivity of the inp lock.
MFC After: 9 days
Reported-by: syzbot+1f5c6800e4f99bdb1a48@syzkaller.appspotmail.com
Reviewed by: tuexen
Differential Revision: https://reviews.freebsd.org/D19594
visible on armv7 and armv8. Similar issue to rS302292.
Obtained from: Semihalf
Authored by: Michal Krawczyk <mk@semihalf.com>
Approved by: wma
Differential Revision: https://reviews.freebsd.org/D19932
Summary: when using pseries-llan driver, Opkts and Oerrs counters (netstat
-i) are always zero. This patch adds an small error handling to increment
these counters.
Submitted by: alfredo.junior_eldorado.org.br
Differential Revision: https://reviews.freebsd.org/D20009
Some hypervisor calls, such as H_SEND_LOGICAL_LAN, take more arguments than
are traditionally passed in registers. The HCALL ABI will accept these
arguments in r11 and r12. With ELFv2 ABI, these arguments are 2
double-words lower than ELFv1 ABI, as two double-words in the stack frame
are no longer used, and therefore removed from the frame. Fix the offsets
for loading the registers for the HCALL. This fixes the phyp_llan driver
with ELFv2 kernel.
Submitted by: alfredo.junior_eldorado.org.br
Differential Revision: https://reviews.freebsd.org/D20008
This commit adds new if_alloc_domain() and if_alloc_dev() methods to
allocate ifnets. When called with a domain on a NUMA machine,
ifalloc_domain() will record the NUMA domain in the ifnet, and it will
allocate the ifnet struct from memory which is local to that NUMA
node. Similarly, if_alloc_dev() is a wrapper for if_alloc_domain
which uses a driver supplied device_t to call ifalloc_domain() with
the appropriate domain.
Note that the new if_numa_domain field fits in an alignment pad in
struct ifnet, and so does not alter the size of the structure.
Reviewed by: glebius, kib, markj
Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D19930
This fixes a bug that prevented the driver from auto-flashing the
firmware when it didn't see one on the card. This feature was
introduced in r321390 and this bug was introduced in r343269.
Reported by: gallatin@
MFC after: 1 week
Sponsored by: Chelsio Communications
