LinuxKPI: Allow kmalloc to be called when FPU protection is enabled

Amdgpu driver does a lot of memory allocations in FPU-protected sections
of code for certain display cores, e.g. for DCN30. This d

LinuxKPI: Allow kmalloc to be called when FPU protection is enabled

Amdgpu driver does a lot of memory allocations in FPU-protected sections
of code for certain display cores, e.g. for DCN30. This does not work
on FreeBSD as its malloc function can not be run within a critical
section. Check this condition and temporally exit from FPU-protected
context to workaround issue and reduce source code patching.

Sponsored by: Serenity Cyber Security, LLC
Reviewed by: manu (previous version)
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D42822

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Revert "LinuxKPI: Add explicit software context to FPU sections"

kmalloc() support within FPU sections will be redone in other way.

This reverts commit 5a3bd281672bd6bd8e18081c3928dfe76d330a5f.

Sp

Revert "LinuxKPI: Add explicit software context to FPU sections"

kmalloc() support within FPU sections will be redone in other way.

This reverts commit 5a3bd281672bd6bd8e18081c3928dfe76d330a5f.

Sponsored by: Serenity Cyber Security, LLC
Requested by: jhb

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Revert "LinuxKPI: Do not use explicit context in FPU sections on powerpc64"

kmalloc() support within FPU sections will be redone in other way.

This reverts commit b4efc62776344a9aaada5a0866e453e528

Revert "LinuxKPI: Do not use explicit context in FPU sections on powerpc64"

kmalloc() support within FPU sections will be redone in other way.

This reverts commit b4efc62776344a9aaada5a0866e453e528a0e977.

Sponsored by: Serenity Cyber Security, LLC
Requested by: jhb

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LinuxKPI: Do not use explicit context in FPU sections on powerpc64

It is not supported yet.

Sponsored by: Serenity Cyber Security, LLC
Fixes: 5a3bd281672b ("LinuxKPI: Add explicit software context

LinuxKPI: Do not use explicit context in FPU sections on powerpc64

It is not supported yet.

Sponsored by: Serenity Cyber Security, LLC
Fixes: 5a3bd281672b ("LinuxKPI: Add explicit software context to FPU sections")
MFC after: 1 week

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LinuxKPI: Add explicit software context to FPU sections

Amdgpu driver does a lot of memory allocations in FPU-protected sections
of code for certain display cores, e.g. for DCN30. This does not work

LinuxKPI: Add explicit software context to FPU sections

Amdgpu driver does a lot of memory allocations in FPU-protected sections
of code for certain display cores, e.g. for DCN30. This does not work
currently on FreeBSD as its malloc function can not be run within a
critical section. Allocate memory for FPU context to overcome such
restriction.

Sponsored by: Serenity Cyber Security, LLC
Reviewed by: manu (previous version), markj
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D42822

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sys: Remove $FreeBSD$: two-line .h pattern

Remove /^\s*\*\n \*\s+\$FreeBSD\$$\n/

linuxkpi: Add compat_ptr and ptr_to_compat

Needed by drm-kmod.

Obtained from: drm-kmod
Sponsored by: Beckhoff Automation GmbH & Co. KG
Differential Revision: https://reviews.freebsd.org/D36016

LinuxKPI: Constantly use _LINUXKPI_ prefix in include guards

MFC after: 1 week
Reviewed by: bz, emaste, hselasky, manu
Differential Revision: https://reviews.freebsd.org/D33562

Implement basic support for allocating memory from a specific numa node
in the LinuxKPI.

Differential Revision: https://reviews.freebsd.org/D29077
Reviewed by: markj@ and kib@
MFC after: 1 week
Spon

Implement basic support for allocating memory from a specific numa node
in the LinuxKPI.

Differential Revision: https://reviews.freebsd.org/D29077
Reviewed by: markj@ and kib@
MFC after: 1 week
Sponsored by: Mellanox Technologies // NVIDIA Networking

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compat: clean up empty lines in .c and .h files

MFhead@r344527

Merge ^/head r344178 through r344512.

lkpi: allow late binding of linux_alloc_current

Some consumers may be loosely coupled with the lkpi.
This allows them to call linux_alloc_current without
having a static dependency.

Reviewed by: hp

lkpi: allow late binding of linux_alloc_current

Some consumers may be loosely coupled with the lkpi.
This allows them to call linux_alloc_current without
having a static dependency.

Reviewed by: hps@
MFC after: 1 week
Sponsored by: iX Systems
Differential Revision: https://reviews.freebsd.org/D19257

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Merge ^/head r313896 through r314128.

Make the LinuxKPI task struct persistent accross system calls.

A set of helper functions have been added to manage the life of the
LinuxKPI task struct. When an external system call or task is invok

Make the LinuxKPI task struct persistent accross system calls.

A set of helper functions have been added to manage the life of the
LinuxKPI task struct. When an external system call or task is invoked,
a check is made to create the task struct by demand. A thread
destructor callback is registered to free the task struct when a
thread exits to avoid memory leaks.

This change lays the ground for emulating the Linux kernel more
closely which is a dependency by the code using the LinuxKPI APIs.

Add new dedicated td_lkpi_task field has been added to struct thread
instead of abusing td_retval[1].

Fix some header file inclusions to make LINT kernel build properly
after this change.

Bump the __FreeBSD_version to force a rebuild of all kernel modules.

MFC after: 1 week
Sponsored by: Mellanox Technologies

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Set "current" for all PCI enumeration callbacks.

Obtained from: kmacy @
MFC after: 1 week
Sponsored by: Mellanox Technologies

MFH r289384-r293170

Sponsored by: The FreeBSD Foundation

Catch up with head.

Remove incorrect defines. The proper version of these macros is
defined in linux/etherdevice.h.

MFC after: 1 week
Sponsored by: Mellanox Technologies

Catch up with head (r291075).

Merge from head

Finish process of moving the LinuxKPI module into the default kernel build.

- Move all files related to the LinuxKPI into sys/compat/linuxkpi and
its subfolders.
- Update sys/conf/files and some M

Finish process of moving the LinuxKPI module into the default kernel build.

- Move all files related to the LinuxKPI into sys/compat/linuxkpi and
its subfolders.
- Update sys/conf/files and some Makefiles to use new file locations.
- Added description of COMPAT_LINUXKPI to sys/conf/NOTES which in turn
adds the LinuxKPI to all LINT builds.
- The LinuxKPI can be added to the kernel by setting the
COMPAT_LINUXKPI option. The OFED kernel option no longer builds the
LinuxKPI into the kernel. This was done to keep the build rules for
the LinuxKPI in sys/conf/files simple.
- Extend the LinuxKPI module to include support for USB by moving the
Linux USB compat from usb.ko to linuxkpi.ko.
- Bump the FreeBSD_version.
- A universe kernel build has been done.

Reviewed by: np @ (cxgb and cxgbe related changes only)
Sponsored by: Mellanox Technologies

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