This makes the compiler less likely to reload the content from %gs.
The 'P' modifier drops all synteax prefixes and 'n' constraint treats
input as a known at compilation time immediate integer.
Example reloading victim was spinlock_enter.
Stolen from: OpenBSD
Reported by: jtl
Reviewed by: kib
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D17615
Apparently AMD machines cannot tolerate this. This was uncovered by
r339386, where cache flush started really flushing the requested range.
Introduce pmap_mapdev_pciecfg(), which simply does not flush cache
comparing with pmap_mapdev(). It assumes that the MCFG region was
never accessed through the cacheable mapping, which is most likely
true for machine to boot at all.
Note that i386 does not need the change, since the architecture
handles access per-page due to the KVA shortage, and page remapping
already does not flush the cache.
Reported and tested by: mjg, Mike Tancsa <mike@sentex.net>
Reviewed by: alc
Sponsored by: The FreeBSD Foundation
Approved by: re (gjb)
MFC after: 2 weeks
Differential revision: https://reviews.freebsd.org/D17612
returns the section start and stop locations as well as a count if the
caller asks for them.
There was only one out-of-file consumer of count which did not actually
use it and hence was eliminated in r339407.
In r194784 parse_dpcpu(), and in r195699 parse_vnet() (a copy of the
former) started to use the link_elf_lookup_set() interface internally
also asking for the count.
count is computed as the difference of the void **stop - void **start
locations and as such, if the absoulte numbers
(stop - start) % sizeof(void *) != 0
a round-down happens, e.g., **stop 0x1003 - **start 0x1000 => count 0.
To get the section size instead of "count is the number of pointer
elements in the section", the parse_*() functions do a
count *= sizeof(void *).
They use the result to allocate memory and copy the section data
into the "master" and per-instance memory regions with a size of
count.
As a result of count possibly round-down this can miss the last
bytes of the section. The good news is that we do not touch
out of bounds memory during these operations (we may at a later stage
if the last bytes would overflow the master sections).
Given relocation in elf_relocaddr() works based on the absolute
numbers of start and stop, this means that we can possibly try to
access relocated data which was never copied and hence we get
random garbage or at best zeroed memory.
Stop the two (last) consumers of count (the parse_*() functions)
from using count as well, and calculate the section size based on
the absolute numbers of stop and start and use the proper size for
the memory allocation and data copies. This will make the symbols
in the last bytes of the pcpu or vnet sections be presented as
expected.
PR: 232289
Approved by: re (gjb)
MFC after: 2 weeks
code paths. Both are not consistent and the one on the syn cache code
does not conform to the relevant specifications (Page 69 of RFC 793
and Section 4.2 of RFC 5961).
This patch fixes this:
* The sequence numbers checks are fixed as specified on
page Page 69 RFC 793.
* The sysctl variable net.inet.tcp.insecure_rst is now honoured
and the behaviour as specified in Section 4.2 of RFC 5961.
Approved by: re (gjb@)
Reviewed by: bz@, glebius@, rrs@,
Differential Revision: https://reviews.freebsd.org/D17595
Sponsored by: Netflix, Inc.
if a network connection is available. This is not an issue when running
'service local_unbound setup' interactively, but can be on a diskless
system where local_unbound self-configures on every boot. To address
this, add explicit dependencies on netwait and defaultroute.
Submitted by: eugen
Approved by: re (gjb)
(e.g. RocketChip, lowRISC and derivatives).
RISC-V page table entries support A (accessed) and D (dirty) bits. The
spec makes hardware support for these bits optional. Implementations that
do not manage these bits in hardware raise page faults for accesses to a
valid page without A set and writes to a writable page without D set.
Check for these types of faults when handling a page fault and fixup the
PTE without calling vm_fault if they occur.
Reviewed by: jhb, markj
Approved by: re (gjb)
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D17424
(e.g. RocketChip, lowRISC and derivatives).
RISC-V page table entries support A (accessed) and D (dirty) bits. The
spec makes hardware support for these bits optional. Implementations that
do not manage these bits in hardware raise page faults for accesses to a
valid page without A set and writes to a writable page without D set.
Check for these types of faults when handling a page fault and fixup the
PTE without calling vm_fault if they occur.
Reviewed by: jhb, markj
Approved by: re (gjb)
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D17424
was really a "socket close" callback.
Update the socket destructor functionality to run when a socket is
destroyed (rather than when it is closed). The original submitter has
confirmed that this change satisfies the intended use case.
Suggested by: rwatson
Submitted by: Michio Honda <micchie at sfc.wide.ad.jp>
Tested by: Michio Honda <micchie at sfc.wide.ad.jp>
Approved by: re (kib)
Differential Revision: https://reviews.freebsd.org/D17590
in r339413, a current pkgbase update problem came up. For users
testing pkgbase at the moment there is no (automatic) way to pick
up new base packages (yet).
As a result rather than also moving init(8) to its own package,
back out the part of the change in r339413 that moved rc* to its
own package and defer creating new packages until the
infrastructure is in place to handle these cases.
Both init and rc* are considered too problematic to be lost by
early adaptors at this stage.
Discussed with: brd
Reviewed by: brd
Approved by: re (gjb)
The reasons for this are forward looking to pkgbase:
* /sbin/init is a special binary; try not to replace it with
every package update because an rc script was touched.
(a follow-up commit will make init its own package)
* having rc in its own place will allow more easy replacement
of the rc framework with alternatives, such as openrc.
Discussed with: brd (during BSDCam), kmoore
Requested by: cem, bz
PR: 231522
Approved by: re (gjb)
in Italy, and is not related to Canada.
While here, remove the header as we do NOT currently use CLDR data to
generate timedef, and it's misleading.
PR: 225855
Reviewed by: bapt
Approved by: re (gjb), kib (mentor)
Differential Revision: https://reviews.freebsd.org/D17551
can see the dmesg buffer (this is the current behavior). When false (the
new default), dmesg will be unavailable to jailed users, whether root or
not.
The security.bsd.unprivileged_read_msgbuf sysctl still works as before,
controlling system-wide whether non-root users can see the buffer.
PR: 211580
Submitted by: bz
Approved by: re@ (kib@)
MFC after: 3 days
format string in arbitrary order. This makes the related test cases in
lib/libc/tests/time (not yet connected to the build) pass.
While here, don't error on negative tm_year value based on the
APPLICATION USAGE in
http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/time.h.html
(glibc does the same):
tm_year is a signed value; therefore, years before 1900 may be represented.
Approved by: re (gjb), kib (mentor)
Differential Revision: https://reviews.freebsd.org/D17550
Driver enumerates NVDIMMs. Besides, for each found System Physical
Address (SPA) range, spaN geom provider is created, which allows
formatting and mounting the region as the normal volume. Also,
/dev/nvdimm_spaN node is created, which can be read/written/mapped by
userspace, the mapping is zero-copy.
No support for block access methods implemented, labels are not
parsed. No management interfaces are provided.
Tested by: Intel, NetApp
Sponsored by: The FreeBSD Foundation
Approved by: re (gjb)
MFC after: 2 weeks
Unconditionally reparenting to PID 1 breaks the procctl(2) reaper
functionality.
Add a regression test for this case.
Reviewed by: kib
Approved by: re (gjb)
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D17589
translator, when using the DWC OTG USB controller driver. Make sure to re-try
getting the complete split packets until a DATA0 packet is received. Larger
isochronous frames may be split into multiple MDATA packets terminated
by a single DATA0 packet.
PR: 230434
MFC after: 3 days
Approved by: re (gjb)
Sponsored by: Mellanox Technologies
The KPI allows to map very large contigous physical memory regions
into KVA, which are not covered by DMAP.
I see both with QEMU and with some real hardware started shipping, the
regions for NVDIMMs might be very far apart from the normal RAM, and
we expect that at least initial users of NVDIMM could install very
large amount of such memory. IMO it is not reasonable to extend DMAP
to cover that far-away regions both because it could overflow existing
4T window for DMAP in KVA, and because it costs in page table pages
allocations, for gap and for possibly unused NV RAM.
Also, KPI provides some special functionality for fast cache flushing
based on the knowledge of the NVRAM mapping use.
Reviewed by: alc, markj
Sponsored by: The FreeBSD Foundation
Approved by: re (gjb)
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D17070
specified. This fixes searching the paths specified in
/usr/local/etc/man.d/*.conf, as currently apropos/whatis from mandoc
suite aren't aware about them.
PR: 227922
Reviewed by: bapt
Approved by: re (gjb), kib (mentor)
Differential Revision: https://reviews.freebsd.org/D17454
Reviewed by: alc, markj
Sponsored by: The FreeBSD Foundation
Approved by: re (gjb)
MFC after: 3 days
Differential revision: https://reviews.freebsd.org/D17070
This was missed in r339367 ("Various fixes for TLB management on RISC-V.").
This fixes operation on lowRISC.
Reviewed by: jhb
Approved by: re (gjb)
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D17583
it. Drop the now unused _PATH_PW_CONF definition. [1]
While here, change the last remaining hardcoded "/etc" to _PATH_PWD.
Noted by: glebius [1]
Reviewed by: eugen
Approved by: re (gjb), kib (mentor)
Differential Revision: https://reviews.freebsd.org/D17575
to this change, the code sometimes used a temporary stack variable to hold
details of a TCP segment. r338102 stopped using the variable to hold
segments, but did not actually remove the variable.
Because the variable is no longer used, we can safely remove it.
Approved by: re (gjb)
cycle.
This is expected to be the final ALPHA build of this release
cycle, prior to branching stable/12.
Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation
This fixes two problems, one where epoch calls could occur before all
the readers had exited the epoch section, and one where the epoch calls
could be unnecessarily delayed.
Approved by: re (glebius)
This fixes two problems, one where epoch calls could occur before all
the readers had exited the epoch section, and one where the epoch calls
could be unnecessarily delayed.
Device removal code uses zio_vdev_child_io() with ZIO_TYPE_NULL parent,
that never happened before. It confused FreeBSD-specific TRIM code,
which does not use VDEV_IO_DONE for logical ZIO_TYPE_FREE ZIOs. As
result of that stage being skipped device removal ZIOs leaked references
and memory that supposed to be freed by VDEV_IO_DONE, making it stuck.
It is a quick patch rather then a nice fix, but hopefully we'll be able
to drop it all together when alternative TRIM implementation finally get
landed.
PR: 228750, 229007
Discussed with: allanjude, avg, smh
Approved by: re (delphij)
MFC after: 5 days
Sponsored by: iXsystems, Inc.
Both ^/sys/compat/freebsd32/syscalls.master and ^/sys/kern/syscalls.master
cited "COMPAT[n] #ifdef" instead of "COMPAT_FREEBSD[n] #ifdef" in places.
Approved by: re (glebius)
explicitly specified. -V path is already used to determine which file
to read default values from, so it's only logical to write them to the
same file.
PR: 231653
Reviewed by: eugen, bapt
Approved by: re (gjb), kib (mentor)
Differential Revision: https://reviews.freebsd.org/D17566
- Remove the arm64-specific cpu_*cache* and cpu_tlb_flush* functions.
Instead, add RISC-V specific inline functions in cpufunc.h for the
fence.i and sfence.vma instructions.
- Catch up to changes in the arm64 pmap and remove all the cpu_dcache_*
calls, pmap_is_current, pmap_l3_valid_cacheable, and PTE_NEXT bits from
pmap.
- Remove references to the unimplemented riscv_setttb().
- Remove unused cpu_nullop.
- Add a link to the SBI doc to sbi.h.
- Add support for a 4th argument in SBI calls. It's not documented but
it seems implied for the asid argument to SBI_REMOVE_SFENCE_VMA_ASID.
- Pass the arguments from sbi_remote_sfence*() to the SEE. BBL ignores
them so this is just cosmetic.
- Flush icaches on other CPUs when they resume from kdb in case the
debugger wrote any breakpoints while the CPUs were paused in the IPI_STOP
handler.
- Add SMP vs UP versions of pmap_invalidate_* similar to amd64. The
UP versions just use simple fences. The SMP versions use the
sbi_remove_sfence*() functions to perform TLB shootdowns. Since we
don't have a valid pm_active field in the riscv pmap, just IPI all
CPUs for all invalidations for now.
- Remove an extraneous TLB flush from the end of pmap_bootstrap().
- Don't do a TLB flush when writing new mappings in pmap_enter(), only if
modifying an existing mapping. Note that for COW faults a TLB flush is
only performed after explicitly clearing the old mapping as is done in
other pmaps.
- Sync the i-cache on all harts before updating the PTE for executable
mappings in pmap_enter and pmap_enter_quick. Previously the i-cache was
only sync'd after updating the PTE in pmap_enter.
- Use sbi_remote_fence() instead of smp_rendezvous in pmap_sync_icache().
Reviewed by: markj
Approved by: re (gjb, kib)
Sponsored by: DARPA
Differential Revision: https://reviews.freebsd.org/D17414
cpu_switch() always reloads the LDT, so this can only affect the
hypervisor process itself. Fix this by explicitly reloading the host
LDT selector after each #VMEXIT. The stock bhyve process on FreeBSD
never uses a custom LDT, so this change is cosmetic.
Reviewed by: kib
Tested by: Mike Tancsa <mike@sentex.net>
Approved by: re (gjb)
MFC after: 2 weeks
Rename functions and variables from ixlv to iavf to match the
user-facing name change. There shouldn't be any functional changes
with this change, but this may help with browsing the source code
and reducing diffs in the future.
Submitted by: kbowling@
Reviewed by: erj@, sbruno@
Approved by: re (gjb@)
Differential Revision: https://reviews.freebsd.org/D17544
At early boot, PCPU_GET(), that obtains a pointer from SPRG0, was being
used with SPRG0 not yet initialized. If it pointed to an invalid
address, the machine would hang.
Approved by: re(gjb), jhibbits(mentor)
