linux-toradex.git/arch/ia64/kernel/entry.S, branch v4.2.7

ia64: remove paravirt code

2015-06-10T21:26:32+00:00

All the ia64 pvops code is now dead code since both
xen and kvm support have been ripped out [0] [1]. Just
that no one had troubled to rip this stuff out. The only
useful remaining pieces were the old pvops docs but that
was recently also generalized and moved out from ia64 [2].

This has been run time tested on an ia64 Madison system.

[0] 003f7de625890 "KVM: ia64: remove" since v3.19-rc1
[1] d52eefb47d4eb "ia64/xen: Remove Xen support for ia64" since v3.14-rc1
[2] "virtual: Documentation: simplify and generalize paravirt_ops.txt"

Signed-off-by: Luis R. Rodriguez 
Signed-off-by: Tony Luck

[IA64] Enable execveat syscall for ia64

2015-01-05T19:25:19+00:00

See commit 51f39a1f0cea1cacf8c787f652f26dfee9611874
    syscalls: implement execveat() system call

Signed-off-by: Tony Luck

[IA64] Enable bpf syscall for ia64

2014-10-09T20:36:10+00:00

See commit 99c55f7d47c0dc6fc64729f37bf435abf43f4c60
   bpf: introduce BPF syscall and maps

Signed-off-by: Tony Luck

[IA64] Wire up memfd_create() system call

2014-08-18T17:29:52+00:00

Yet another system call. This one added by:

   commit 9183df25fe7b194563db3fec6dc3202a5855839c
   shm: add memfd_create() syscall

Signed-off-by: Tony Luck

[IA64] Wire up getrandom() system call

2014-08-06T21:37:12+00:00

See commit c6e9d6f38894798696f23c8084ca7edbf16ee895
    random: introduce getrandom(2) system call

for all the details (and even a manual page!)

Signed-off-by: Tony Luck

ia64: add renameat2 syscall

2014-05-20T08:59:38+00:00

Signed-off-by: Miklos Szeredi 
Acked-by: Tony Luck

[IA64] Wire up new sched_setattr and sched_getattr syscalls

2014-01-28T17:52:53+00:00

New syscalls for v3.14

Signed-off-by: Tony Luck

ia64: Use preempt_schedule_irq

2013-11-13T19:21:47+00:00

Use the proper core function instead of fiddling with PREEMPT_ACTIVE
and enable/disable interrupts in the low level code.

Signed-off-by: Thomas Gleixner 
Cc: Tony Luck 
Cc: Fenghua Yu 
Cc: linux-ia64@vger.kernel.org
Link: http://lkml.kernel.org/r/20130917183628.857145384@linutronix.de

cputime: Generic on-demand virtual cputime accounting

2013-01-27T18:23:27+00:00

If we want to stop the tick further idle, we need to be
able to account the cputime without using the tick.

Virtual based cputime accounting solves that problem by
hooking into kernel/user boundaries.

However implementing CONFIG_VIRT_CPU_ACCOUNTING require
low level hooks and involves more overhead. But we already
have a generic context tracking subsystem that is required
for RCU needs by archs which plan to shut down the tick
outside idle.

This patch implements a generic virtual based cputime
accounting that relies on these generic kernel/user hooks.

There are some upsides of doing this:

- This requires no arch code to implement CONFIG_VIRT_CPU_ACCOUNTING
if context tracking is already built (already necessary for RCU in full
tickless mode).

- We can rely on the generic context tracking subsystem to dynamically
(de)activate the hooks, so that we can switch anytime between virtual
and tick based accounting. This way we don't have the overhead
of the virtual accounting when the tick is running periodically.

And one downside:

- There is probably more overhead than a native virtual based cputime
accounting. But this relies on hooks that are already set anyway.

Signed-off-by: Frederic Weisbecker 
Cc: Andrew Morton 
Cc: Ingo Molnar 
Cc: Li Zhong 
Cc: Namhyung Kim 
Cc: Paul E. McKenney 
Cc: Paul Gortmaker 
Cc: Peter Zijlstra 
Cc: Steven Rostedt 
Cc: Thomas Gleixner

Wire up finit_module syscall

2013-01-03T18:57:23+00:00

Linux was granted a new system call to load modules by file descriptor
in commit 34e1169d996a ("module: add syscall to load module from fd").

Wire it up for ia64 (ready for the Chrome port :-)

Signed-off-by: Tony Luck 
Signed-off-by: Linus Torvalds