linux.git/arch/um/include/shared/os.h, branch v5.5 Linux kernel source tree um: Add SPDX headers for files in arch/um/include 2019-09-15T19:37:17+00:00 Alex Dewar alex.dewar@gmx.co.uk 2019-08-25T09:49:19+00:00 f2f4bf5aabadd6575f5daabcb0a2f506e3f5f68c Convert files to use SPDX header. All files are licensed under the GPLv2. Signed-off-by: Alex Dewar <alex.dewar@gmx.co.uk> Signed-off-by: Richard Weinberger <richard@nod.at> 
Convert files to use SPDX header. All files are licensed under the GPLv2.

Signed-off-by: Alex Dewar <alex.dewar@gmx.co.uk>
Signed-off-by: Richard Weinberger <richard@nod.at>
um: drivers: Add virtio vhost-user driver 2019-09-15T19:37:15+00:00 Erel Geron erelx.geron@intel.com 2019-09-11T12:51:20+00:00 5d38f324993f49d1226ec81efe045834b46cd85a This module allows virtio devices to be used over a vhost-user socket. Signed-off-by: Erel Geron <erelx.geron@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Richard Weinberger <richard@nod.at> 
This module allows virtio devices to be used over a vhost-user socket.

Signed-off-by: Erel Geron <erelx.geron@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
um: Implement TRACE_IRQFLAGS_SUPPORT 2019-09-15T19:37:11+00:00 Johannes Berg johannes.berg@intel.com 2019-08-23T11:16:23+00:00 0dafcbe128d2af48919619f79332ef219b5e5514 UML enables TRACE_IRQFLAGS_SUPPORT but doesn't actually implement it. It seems to have been added for lockdep support, but that can't actually really work well without IRQ flags tracing, as is also very noisily reported when enabling CONFIG_DEBUG_LOCKDEP. Implement it now. Fixes: 711553efa5b8 ("[PATCH] uml: declare in Kconfig our partial LOCKDEP support") Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Richard Weinberger <richard@nod.at> 
UML enables TRACE_IRQFLAGS_SUPPORT but doesn't actually implement
it. It seems to have been added for lockdep support, but that can't
actually really work well without IRQ flags tracing, as is also
very noisily reported when enabling CONFIG_DEBUG_LOCKDEP.

Implement it now.

Fixes: 711553efa5b8 ("[PATCH] uml: declare in Kconfig our partial LOCKDEP support")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
um: Pass nsecs to os timer functions 2019-07-02T21:27:29+00:00 Johannes Berg johannes.berg@intel.com 2019-05-27T08:34:26+00:00 c7c6f3b95303c7de5d52af56c902fcb5abe827df This makes the code clearer and lets the time travel patch have the actual time used for these functions in just one place. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Richard Weinberger <richard@nod.at> 
This makes the code clearer and lets the time travel patch have
the actual time used for these functions in just one place.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
um: Timer code cleanup 2019-07-02T21:27:00+00:00 Johannes Berg johannes.berg@intel.com 2019-05-06T12:39:38+00:00 56fc187065451ebca74edb30d50de5f10a88339b There are some unused functions, and some others that have unused arguments; clean up the timer code a bit. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Richard Weinberger <richard@nod.at> 
There are some unused functions, and some others that have
unused arguments; clean up the timer code a bit.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
um: fix os_timer_one_shot() 2019-07-02T21:26:57+00:00 Johannes Berg johannes.berg@intel.com 2019-05-06T12:39:37+00:00 fcd242c6c835dff4b5334b4db870f9fc23a8e7b7 os_timer_one_shot() gets passed a value "unsigned long delta", so must not have an "int ticks" as that actually ends up being -1, and thus triggering a timer over and over again. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Richard Weinberger <richard@nod.at> 
os_timer_one_shot() gets passed a value "unsigned long delta",
so must not have an "int ticks" as that actually ends up being
-1, and thus triggering a timer over and over again.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
um: Add support for DISCARD in the UBD Driver 2018-12-27T21:48:20+00:00 Anton Ivanov anton.ivanov@cambridgegreys.com 2018-11-14T18:41:09+00:00 50109b5a03b4024eb6b8df3ab8f427625f54fe92 Support for DISCARD and WRITE_ZEROES in the ubd driver using fallocate. DISCARD is enabled by default and can be disabled using a new UBD command line flag. If the underlying fs on which the UBD image is stored does not support DISCARD the support for both DISCARD and WRITE_ZEROES is turned off. Signed-off-by: Anton Ivanov <anton.ivanov@cambridgegreys.com> Signed-off-by: Richard Weinberger <richard@nod.at> 
Support for DISCARD and WRITE_ZEROES in the ubd driver using
fallocate.

DISCARD is enabled by default and can be disabled using a new
UBD command line flag.

If the underlying fs on which the UBD image is stored does not
support DISCARD the support for both DISCARD and WRITE_ZEROES
is turned off.

Signed-off-by: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
Epoll based IRQ controller 2018-02-19T18:38:51+00:00 Anton Ivanov anton.ivanov@cambridgegreys.com 2017-11-20T21:17:58+00:00 ff6a17989c08b0bb0fd490cc500b084581b3a9b9 1. Removes the need to walk the IRQ/Device list to determine who triggered the IRQ. 2. Improves scalability (up to several times performance improvement for cases with 10s of devices). 3. Improves UML baseline IO performance for one disk + one NIC use case by up to 10%. 4. Introduces write poll triggered IRQs. 5. Prerequisite for introducing high performance mmesg family of functions in network IO. 6. Fixes RNG shutdown which was leaking a file descriptor Signed-off-by: Anton Ivanov <anton.ivanov@cambridgegreys.com> Signed-off-by: Richard Weinberger <richard@nod.at> 
1. Removes the need to walk the IRQ/Device list to determine
who triggered the IRQ.
2. Improves scalability (up to several times performance
improvement for cases with 10s of devices).
3. Improves UML baseline IO performance for one disk + one NIC
use case by up to 10%.
4. Introduces write poll triggered IRQs.
5. Prerequisite for introducing high performance mmesg family
of functions in network IO.
6. Fixes RNG shutdown which was leaking a file descriptor

Signed-off-by: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
um: Fix FP register size for XSTATE/XSAVE 2017-09-13T20:24:38+00:00 Thomas Meyer thomas@m3y3r.de 2017-07-29T15:03:23+00:00 6f602afda7275c24c20ba38b5b6cd4ed08561fff Hard code max size. Taken from https://sourceware.org/git/?p=binutils-gdb.git;a=blob;f=gdb/common/x86-xstate.h Signed-off-by: Thomas Meyer <thomas@m3y3r.de> Signed-off-by: Richard Weinberger <richard@nod.at> 
Hard code max size. Taken from
https://sourceware.org/git/?p=binutils-gdb.git;a=blob;f=gdb/common/x86-xstate.h

Signed-off-by: Thomas Meyer <thomas@m3y3r.de>
Signed-off-by: Richard Weinberger <richard@nod.at>
um: Add os_warn() for pre-boot warning/error messages 2017-07-05T21:18:02+00:00 Masami Hiramatsu mhiramat@kernel.org 2017-05-17T17:18:22+00:00 721ccae88d04f7e9334fde4cbb3eecfaa70a31ac Add os_warn() for printing out pre-boot warning/error messages in stderr. The messages via os_warn() are not suppressed by quiet option. Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Richard Weinberger <richard@nod.at> 
Add os_warn() for printing out pre-boot warning/error
messages in stderr. The messages via os_warn() are not
suppressed by quiet option.

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Richard Weinberger <richard@nod.at>