It is removed from Linux since 4.11.
In FreeBSD it results in several #ifdefs in drm-kmod.
Reviewed by: emaste, hselasky, manu
Differential revision: https://reviews.freebsd.org/D32169
For now, disable backlight if brightness level is set to 0.
In the future we may implement separate knob in backlight(8).
Required by drm-kmod v5.6
Reviewed by: hselasky, manu
MFC after: 2 weeks
Differential revision: https://reviews.freebsd.org/D32165
from other vm_objects. This workarounds "Page already inserted" panic
in vm_page_insert routine triggered on attempt to mmap file created
with shmem_file_setup call. After introduction of "GTT mmap
interface v4" a.k.a. MMAP_OFFSET, vm_objects allocated by these calls
may try to own intersected sets of pages that leads to the assertion.
Reviewed by: kib
MFC after: 2 weeks
Differential revision: https://reviews.freebsd.org/D32090
Although drm-kmod contains better implementation which is able to
allocate real entries on pseudofs, this feature has never been used.
Starting from drm-kmod v5.6 old implementation began to leak entries
on each drm device close(). Now just drop pseudofs support instead of
fixing it in drm-kmod and provide stub in base.
Reviewed by: hselasky, manu
MFC after: 2 weeks
Differential revision: https://reviews.freebsd.org/D32069
from GEM and TTM page fault handlers and move it in to base system. This
code is tightly integrated with LKPI mmap support to belong to drm-kmod.
As this routine requires associated vm_object to be locked, it got
additional _locked suffix.
Reviewed by: hselasky, markj
MFC after: 2 weeks
Differential revision: https://reviews.freebsd.org/D32068
This fixes following warnings when shrinkers are invoked first time:
uma_zalloc_debug: zone "lkpicurr" with the following non-sleepable
locks held: exclusive sleep mutex lkpi-shrinker (lkpi-shrinker)
uma_zalloc_debug: zone "lkpimm" with the following non-sleepable locks
held: exclusive sleep mutex lkpi-shrinker (lkpi-shrinker)
Reviewed by: hselasky, manu
MFC after: 2 weeks
Differential revision: https://reviews.freebsd.org/D32066
except linux/pci.h to avoid conflicts with Linux version.
This allows to #define resource in drm-kmod globally and strip some #ifdef-s
Reviewed by: hselasky, manu
MFC after: 2 weeks
Differential revision: https://reviews.freebsd.org/D31673
get_file_rcu() grabs a file if the file->f_count is not zero.
Required by drm-kmod 5.6
Reviewed by: hselasky, manu (previous version)
MFC after: 2 weeks
Differential revision: https://reviews.freebsd.org/D31672
Add a missing "static" for non-{i386,amd64,arm64} which was missed in
c39eefe715. This should ifx the builds.
Sponsored by: The FreeBSD Foundation
MFC after: 7 days
X-MFC with: c39eefe715
Coherent is lower 32bit only by default in Linux and our only default
dma mask is 64bit currently which violates expectations unless
dma_set_coherent_mask() was called explicitly with a different mask.
Implement coherent by creating a second tag, and storing the tags in the
objects and use the tag from the object wherever possible.
This currently does not update the scatterlist or pool (both could be
converted but S/G cannot be MFCed as easily).
There is a 2nd change embedded in the updated logic of
linux_dma_alloc_coherent() to always zero the allocation as
otherwise some drivers get cranky on uninialised garbage.
Sponsored by: The FreeBSD Foundation
MFC after: 7 days
Reviewed by: hselasky
Differential Revision: https://reviews.freebsd.org/D32164
In some places we are using "mask" and others "dma_mask" for the
same thing. Harmonize the various places to "dma_mask" as used in
linux_pci.c. For the declaration remove the argument names to
avoid the entire problem.
This is in preparation for an upcoming change.
No functional changes intended.
Sponsored by: The FreeBSD Foundation
MFC after: 5 days
As reported by multiple people testing iwlwifi, device_release_driver()
can lead to a panic on secondary errors (usually during attach).
Disable device_release_driver() for the short-term to prevent the panic
but leave it in place so it can be re-worked and fixed properly for
the long-term more easily.
Sponsored by: The FreeBSD Foundation
MFC after: 3 days
According to https://github.com/NuxiNL/cloudlibc:
CloudABI is no longer being maintained. It was an awesome experiment,
but it never got enough traction to be sustainable.
There is no reason to keep it in FreeBSD.
Approved by: ed (private mail)
Reviewed by: emaste
Sponsored by: The FreeBSD Foundation
Differential revision: https://reviews.freebsd.org/D31923
freebsd32_sendmsg() and freebsd32_recvmsg() both copyin the message
header twice, once directly and once in freebsd32_copyinmsghdr(). The
iovec length from the former is used when copying in msg_iov, but the
rest of the kernel uses the iovec length from the latter. When
kern_sendit() and kern_recvit() iterate over the iovec to compute the
residual for I/O, they can therefore end up walking past the end of the
copied in iovec, either resulting in a system call error, userspace
memory corruption from uiomove() with invalid iovecs, or a kernel page
fault if the copied-in iovec is followed by an unmapped KVA region.
Reported by: syzbot+7cc64cd0c49605acd421@syzkaller.appspotmail.com
Reviewed by: kib, emaste
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D32010
It allows to override kern.elf{32,64}.allow_wx on per-process basis.
In particular, it makes it possible to run binaries without PT_GNU_STACK
and without elfctl note while allow_wx = 0.
Reviewed by: brooks, emaste, markj
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D31779
Reimplement bdf0f24bb1 by checking for the caller' ABI in
the implementation of PT_GET_SC_ARGS, and copying out everything if
it is Linuxolator.
Also fix a minor information leak: if PT_GET_SC_ARGS_ALL is done on the
thread reused after other process, it allows to read some number of that
thread last syscall arguments. Clear td_sa.args in thread_alloc().
Reviewed by: jhb
Sponsored by: The FreeBSD Foundation
Differential revision: https://reviews.freebsd.org/D31968
GCC only added support for __has_builtin in GCC 10. However, all
supported versions of GCC and clang include these builtins so just use
them unconditionally.
This fixes the build with GCC 9.
Reviewed by: manu, hselasky, imp
Differential Revision: https://reviews.freebsd.org/D31942
This is one of the pieces required to make modern (ie Focal)
strace(1) work.
Reviewed By: jhb (earlier version)
Sponsored by: EPSRC
Differential Revision: https://reviews.freebsd.org/D28212
Switch the main syscall table to use CAPENABLED flags rather than
capabilities.conf. This avoid synchronization issues between
syscalls.master and capabilities.conf (e.g. when renaming a syscall
during development).
For now, move capabilities.conf to sys/compat/freebsd32 and use it
there. Use of sys/compat/freebsd32/syscalls.master should be replaced
by makesyscalls.lua enhancements to allow the main one to be used.
This change results in no changes to generated files after running
`make sysent`.
Reviewed by: kevans, emaste
MFC after: 1 week
Sponsored by: DARPA
Differential Revision: https://reviews.freebsd.org/D31350
Move the common kernel function signatures from machine/reg.h to a new
sys/reg.h. This is in preperation for adding PT_GETREGSET to ptrace(2).
Reviewed by: imp, markj
Sponsored by: DARPA, AFRL (original work)
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D19830
CLONE_CLEAR_SIGHAND is designed to reset all signal handlers of the child
not set to SIG_IGN to SIG_DFL.
Reviewed by: kib
Differential revision: https://reviews.freebsd.org/D31481
MFC after: 2 weeks
In preparation for clone3 system call add struct clone_args and use it in
clone implementation.
Move all of clone related bits to the newly created linux_fork.h header.
Differential revision: https://reviews.freebsd.org/D31474
MFC after: 2 weeks
At least Linux x86 ABI's does not use carry bit and expects that the dx register
is preserved. For this add a new sv_set_fork_retval hook and call it from cpu_fork().
Add a short comment about touching dx in x86_set_fork_retval(), for more details
see phab comments from kib@ and imp@.
Reviewed by: kib
Differential revision: https://reviews.freebsd.org/D31472
MFC after: 2 weeks
As no more NetBSD code in futexes exists replace NetBSD copyrights by
standard FreeBSD 2 clause license.
Add Roman Divacky's copyrights as an author of the robust futexes.
Differential revision: https://reviews.freebsd.org/D31347
MFC after: 2 weeks
These ones were unambiguous cases where the Foundation was the only
listed copyright holder (in the associated license block).
Sponsored by: The FreeBSD Foundation
fspacectl(2) is a system call to provide space management support to
userspace applications. VOP_DEALLOCATE(9) is a VOP call to perform the
deallocation. vn_deallocate(9) is a public KPI for kmods' use.
The purpose of proposing a new system call, a KPI and a VOP call is to
allow bhyve or other hypervisor monitors to emulate the behavior of SCSI
UNMAP/NVMe DEALLOCATE on a plain file.
fspacectl(2) comprises of cmd and flags parameters to specify the
space management operation to be performed. Currently cmd has to be
SPACECTL_DEALLOC, and flags has to be 0.
fo_fspacectl is added to fileops.
VOP_DEALLOCATE(9) is added as a new VOP call. A trivial implementation
of VOP_DEALLOCATE(9) is provided.
Sponsored by: The FreeBSD Foundation
Reviewed by: kib
Differential Revision: https://reviews.freebsd.org/D28347
Fix a bug that slipped in in 90707c4e44
using the correct field in le32p_replace_bits().
MFC after: 3 days
Reviewed by: hselasky
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D31352
