This code was iteratively implemented during the work on various WiFi
drivers -- from individual functions to a macro-created implementations
for the various bit sized needed (and then extended to more for
comepleteness). Some of the bit combinations do not seem to make sense
so are left out.
The __bf_shf(x) was obtained from D26681 [1].
Requested by: manu [1]
Reviewed by: hselasky, manu
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D26708
Add release_pages needed by drm which simply calls put_page for
all the pages provided
Reviewed by: bz
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D26680
Add power_supply_is_system_supplied which is needed by drm.
Reviewed by: bz
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D26679
Only add prefetchw as it is the only function used by drm.
Simply use the __builtin_prefetch which is available in all
compiler for a long time.
Reviewed by: bz
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D26677
This compute the common greater divider
Taken from OpenBSD
Reviewed by: bz, imp
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D26674
dmi function are used to get smbios values.
The DRM subsystem and drivers use it to enabled (or not) quirks.
Reviewed by: hselasky
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D26046
Add backlight function to linuxkpi.
Graphics drivers expose the backlight of the panel directly so allow them to use the backlight subsystem so
user can use backlight(8) to configure them.
Reviewed by: hselasky
Relnotes: yes
Differential Revision: The FreeBSD Foundation
and current address space is already destroyed, so kern_execve()
terminates the process.
While there, clean up some internals of post_execve() inlined in init_main.
Reported by: Peter <pmc@citylink.dinoex.sub.org>
Reviewed by: markj
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D26525
This makes it possible to run an unmodified Linux syzkaller executor
against the Linuxulator, and have it gather code coverage information.
Sponsored by: The FreeBSD Foundation
In Linux, ksize() gets the actual amount of memory allocated for a given
object. This commit adds malloc_usable_size() to FreeBSD KPI which does
the same. It also maps LinuxKPI ksize() to newly created function.
ksize() function is used by drm-kmod.
Reviewed by: hselasky, kib
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D26215
This is a step towards facilitating jails with only Linux binaries.
Supporting emul_path adds path lookups which are completely spurious
if the binary at hand runs in a Linux-based root directory.
It defaults to on (== current behavior).
make -C /root/linux-5.3-rc8 -s -j 1 bzImage:
use_emul_path=1: 101.65s user 68.68s system 100% cpu 2:49.62 total
use_emul_path=0: 101.41s user 64.32s system 100% cpu 2:45.02 total
After r340674, the "continue" would restart the loop without having
updated clen, resulting in an infinite loop. Restore the old behaviour
of simply ignoring all control messages on such sockets, since we
currently only implement handling for AF_UNIX-specific messages.
Reported by: syzkaller
Reviewed by: tijl
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D26093
vm_object_madvise() is a no-op for unmanaged objects, but we should also
limit the scope of mappings on which pmap_remove() is called. In
particular, with the WIP largepage shm objects patch the kernel must
remove mappings of such objects along superpage boundaries, and without
this check Linux madvise(MADV_DONTNEED) could violate that requirement.
Reviewed by: alc, kib
MFC with: r362631
Sponsored by: Juniper Networks, Klara Inc.
Differential Revision: https://reviews.freebsd.org/D26084
The linux function does a lot more than that as multiple waitqueue could be fetch
from a static table based on the hash of the argument but since in DRM it's only used
in one place just add a single variable.
We will probably need to change that in the futur but it's ok with DRM even with current
linux.
Reviewed by: hselasky
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D26054
- Fill out MemFree correctly. Delete an ancient comment suggesting that
we don't want to advertise the true quantity of free memory.
- Populate the Buffers field by reading vfs.bufspace.
- The page cache consists of all pages in page queues, not just the
inactive queue.
PR: 248463
Reported and tested by: danfe
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
LinuxKPI after r359727. This fixes a minor regression issue. Else the
priority tracking won't work properly when both sleepable and
non-sleepable RCU is in use on the same thread.
Bump the __FreeBSD_version to force recompilation of external kernel
modules.
PR: 242272
MFC after: 1 week
Sponsored by: Mellanox Technologies
The current scheme of calling VOP_GETATTR adds avoidable overhead.
An example with tmpfs doing fstat (ops/s):
before: 7488958
after: 7913833
Reviewed by: kib (previous version)
Differential Revision: https://reviews.freebsd.org/D25910
extensible arrays implementation.
While at it add some more comments explaining the current
radix_tree_insert() function and make sure to clean the root node when
the radix tree reaches the maximum height. This can happen if the
index passed is too big when the tree is empty.
The radix_tree_store() function is basically a copy of the
radix_tree_insert() function with some added functionality.
The radix_tree_store() function is local to FreeBSD and does not yet
exist in Linux.
Reviewed by: kib
MFC after: 1 week
Sponsored by: Mellanox Technologies
This compare two 32 bits times
Sponsored by: The FreeBSD Foundation
Reviewed by: kib, hselasky
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D25700
This calls clear_bit and adds a memory barrier.
Sponsored by: The FreeBSD Foundation
Reviewed by: hselasky
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D25943
We don't do anything with the _nesteds variant so just call mutex_lock_interruptible
Sponsoredby: The FreeBSD Foundation
Reviewed by: hselasky
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D25944
Same as kref_put but in addition to calling the rel function it will
acquire the lock first.
Sponsored by: The FreeBSD Foundation
Reviewed by: hselasky, emaste
Differential Revision: https://reviews.freebsd.org/D25942
This file contain some defines for common sizes.
Sponsored-by: The FreeBSD Foundation
Reviewed by: hselasky, emaste
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D25941
This isn't used for us but allow us to port drivers more easily.
Reviewed by: hselasky
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D25703
Linux does the same, this avoids ifdef or extra includes in ported drivers.
Reviewed by: emaste, hselasky
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D25702
Linux does the same, this avoids ifdef or extra includes in ported drivers.
Reviewed by: emaste, hselasky
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D25701
Handle the fact that parts of usb(4) can be compiled into the boot
loader, where M_WAITOK does not guarantee a successful allocation.
PR: 240545
Submitted by: Andrew Reiter <arr@watson.org> (original version)
Reviewed by: hselasky
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D25706
