02 Aug, 2012
1 commit
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UML guest processes now get correct siginfo_t for SIGTRAP, SIGFPE,
SIGILL and SIGBUS. Specifically, si_addr and si_code are now correct
where previously they were si_addr = NULL and si_code = 128.Signed-off-by: Martin Pärtel
Signed-off-by: Richard Weinberger
25 Mar, 2012
1 commit
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Since commit [e58aa3d2: genirq: Run irq handlers with interrupts disabled],
We run all interrupt handlers with interrupts disabled
and we even check and yell when an interrupt handler
returns with interrupts enabled (see commit [b738a50a:
genirq: Warn when handler enables interrupts]).So now this flag is a NOOP and can be removed.
Signed-off-by: Yong Zhang
Signed-off-by: Richard Weinberger
22 Nov, 2011
1 commit
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This converts the um clocksource to use clocksource_register_hz/khz
This is untested, so any assistance in testing would be appreciated!
CC: Jeff Dike
CC: Thomas Gleixner
Signed-off-by: John Stultz
04 Aug, 2010
1 commit
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commit 9f31f57(um: Convert to use read_persistent_clock) moved the
code, but not the variable.Signed-off-by: Thomas Gleixner
27 Jul, 2010
1 commit
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This patch converts the um arch to use read_persistent_clock().
This allows it to avoid accessing xtime and wall_to_monotonic
directly.Signed-off-by: John Stultz
Cc: Jeff Dike
LKML-Reference:
Signed-off-by: Thomas Gleixner
22 Apr, 2009
1 commit
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Pass clocksource pointer to the read() callback for clocksources. This
allows us to share the callback between multiple instances.[hugh@veritas.com: fix powerpc build of clocksource pass clocksource mods]
[akpm@linux-foundation.org: cleanup]
Signed-off-by: Magnus Damm
Acked-by: John Stultz
Cc: Thomas Gleixner
Signed-off-by: Hugh Dickins
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
13 Dec, 2008
1 commit
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Impact: change calling convention of existing clock_event APIs
struct clock_event_timer's cpumask field gets changed to take pointer,
as does the ->broadcast function.Another single-patch change. For safety, we BUG_ON() in
clockevents_register_device() if it's not set.Signed-off-by: Rusty Russell
Cc: Ingo Molnar
25 Jul, 2008
1 commit
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- Make some variables and functions static, since they don't need to be
global.- Remove an unused function - arch/um/kernel/time.c::sched_clock().
- Clean the style a bit as complained by checkpatch.pl.
Cc: Jeff Dike
Signed-off-by: WANG Cong
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
13 May, 2008
1 commit
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UML's supposed nanosecond clock interacts badly with NTP when NTP
decides that the clock has drifted ahead and needs to be slowed down.
Slowing down the clock is done by decrementing the cycle-to-nanosecond
multiplier, which is 1. Decrementing that gives you 0 and time is
stopped.This is fixed by switching to a microsecond clock, with a multiplier
of 1000.Signed-off-by: Jeff Dike
Cc: WANG Cong
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
29 Apr, 2008
1 commit
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Add a proper extern for late_time_init in include/linux/init.h
Signed-off-by: Adrian Bunk
Acked-by: Ingo Molnar
Cc: Thomas Gleixner
Cc: john stultz
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
06 Feb, 2008
1 commit
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Joe Perches noticed some printks in smp.c that needed fixing.
While I was in there, I did the usual tidying in arch/um/kernel, which
should be fairly style-clean at this point:
copyright updates
emacs formatting comments removal
include tidying
style fixesCc: Joe Perches
Signed-off-by: Jeff Dike
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
17 Oct, 2007
11 commits
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There are various uses of powers of 1000, plus the odd BILLION constant in the
time code. However, there are perfectly good definitions of *SEC_PER_*SEC in
linux/time.h which can be used instaed.These are replaced directly in kernel code. Userspace code imports those
constants as UM_*SEC_PER_*SEC and uses these.Signed-off-by: Jeff Dike
Cc: Thomas Gleixner
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Enable tickless support.
CONFIG_TICK_ONESHOT and CONFIG_NO_HZ are enabled.
itimer_clockevent gets CLOCK_EVT_FEAT_ONESHOT and an implementation of
.set_next_event.CONFIG_UML_REAL_TIME_CLOCK goes away because it only makes sense when there is
a clock ticking away all the time. timer_handler now just calls do_IRQ once
without trying to figure out how many ticks to emulate.The idle loop now needs to turn ticking on and off.
Userspace ticks keep happening as usual. However, the userspace loop keep
track of when the next wakeup should happen and suppresses process ticks until
that happens.Signed-off-by: Jeff Dike
Cc: Thomas Gleixner
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add clocksource support.
Signed-off-by: Jeff Dike
Cc: Thomas Gleixner
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Enable CONFIG_GENERIC_CLOCKEVENTS.
timer_irq gets its name changed to timer_handler, and becomes the recipient of
timer signals.The clock_event_device is set up to imitate the current ticking clock, i.e.
CLOCK_EVT_FEAT_ONESHOT is not enabled yet.disable_timer now doesn't ignore SIGALRM and SIGVTALRM because that breaks
delay calibration.Signed-off-by: Jeff Dike
Cc: Thomas Gleixner
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Enable CONFIG_GENERIC_TIME.
As a side-effect of this, the UML implementations of do_gettimeofday and
do_settimeofday go away, as these are provided by generic code. set_time also
goes away since it was only used by do_settimeofday.Signed-off-by: Jeff Dike
Cc: Thomas Gleixner
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Move timer signal initialization from init_irq_signals to a new function,
timer_init.Signed-off-by: Jeff Dike
Cc: Thomas Gleixner
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
set_interval took a timer type as an argument, but it always specified a
virtual timer. So, it is not needed, and it is gone, and set_interval is
simplified appropriately.Signed-off-by: Jeff Dike
Cc: Thomas Gleixner
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Eliminate hz() since its only purpose was to provide a kernel-space constant
to userspace code. This can be done instead by providing the constant
directly through kernel_constants.h.Signed-off-by: Jeff Dike
Cc: Thomas Gleixner
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Formatting changes in the files which have been changed in the course
of folding foo_skas functions into their callers. These include:
copyright updates
header file trimming
style fixes
adding severity to printksThese changes should be entirely non-functional.
Signed-off-by: Jeff Dike
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This patch makes a number of simplifications enabled by the removal of
CHOOSE_MODE. There were lots of functions that looked likeint foo(args){
foo_skas(args);
}The bodies of foo_skas are now folded into foo, and their declarations (and
sometimes entire header files) are deleted.In addition, the union uml_pt_regs, which was a union between the tt and skas
register formats, is now a struct, with the tt-mode arm of the union being
removed.It turns out that usr2_handler was unused, so it is gone.
Signed-off-by: Jeff Dike
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The next stage after removing code which depends on CONFIG_MODE_TT is removing
the CHOOSE_MODE abstraction, which provided both compile-time and run-time
branching to either tt-mode or skas-mode code.This patch removes choose-mode.h and all inclusions of it, and replaces all
CHOOSE_MODE invocations with the skas branch. This leaves a number of trivial
functions which will be dealt with in a later patch.There are some changes in the uaccess and tls support which go somewhat beyond
this and eliminate some of the now-redundant functions.Signed-off-by: Jeff Dike
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
09 May, 2007
1 commit
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The ever-vigilant users of linode.com noticed that an idle 2.6 UML has a
persistent load average of ~.4.It turns out that because the UML timer handler processed softirqs before
actually delivering the tick, the tick was counted in the context of the idle
thread about half the time.Signed-off-by: Jeff Dike
Cc: Paolo 'Blaisorblade' Giarrusso
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
08 May, 2007
2 commits
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With the current timekeeping, !CONFIG_UML_REAL_TIME_CLOCK has
inconsistent behavior. Previously, gettimeofday could be (and was)
isolated from the clock ticking. Now, it's not, so when
CONFIG_UML_REAL_TIME_CLOCK is disabled, gettimeofday must progress in
lockstep with the clock, making it fully virtual.Signed-off-by: Jeff Dike
Cc: Paolo 'Blaisorblade' Giarrusso
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
user_util.h isn't needed any more, so delete it and remove all includes of it.
Signed-off-by: Jeff Dike
Cc: Paolo 'Blaisorblade' Giarrusso
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
12 Feb, 2007
1 commit
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prev_nsecs and delta need to be arrays, and indexed by CPU number.
Signed-off-by: Jeff Dike
Cc: Paolo 'Blaisorblade' Giarrusso
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
09 Oct, 2006
1 commit
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Real fix for UML pt_regs stuff. Note set_irq_regs() logics in there...
Signed-off-by: Al Viro
Signed-off-by: Linus Torvalds
30 Sep, 2006
1 commit
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Pass ticks to do_timer() and update_times(), and adjust x86_64 and s390
timer interrupt handler with this change.Currently update_times() calculates ticks by "jiffies - wall_jiffies", but
callers of do_timer() should know how many ticks to update. Passing ticks
get rid of this redundant calculation. Also there are another redundancy
pointed out by Martin Schwidefsky.This cleanup make a barrier added by
5aee405c662ca644980c184774277fc6d0769a84 needless. So this patch removes
it.As a bonus, this cleanup make wall_jiffies can be removed easily, since now
wall_jiffies is always synced with jiffies. (This patch does not really
remove wall_jiffies. It would be another cleanup patch)Signed-off-by: Atsushi Nemoto
Cc: Martin Schwidefsky
Cc: "Eric W. Biederman"
Cc: Thomas Gleixner
Cc: Ingo Molnar
Cc: john stultz
Cc: Andi Kleen
Cc: Paul Mackerras
Cc: Benjamin Herrenschmidt
Cc: Richard Henderson
Cc: Ivan Kokshaysky
Acked-by: Russell King
Cc: Ian Molton
Cc: Mikael Starvik
Acked-by: David Howells
Cc: Yoshinori Sato
Cc: Hirokazu Takata
Acked-by: Ralf Baechle
Cc: Kyle McMartin
Cc: Heiko Carstens
Cc: Martin Schwidefsky
Cc: Paul Mundt
Cc: Kazumoto Kojima
Cc: Richard Curnow
Cc: William Lee Irwin III
Cc: "David S. Miller"
Cc: Jeff Dike
Cc: Paolo 'Blaisorblade' Giarrusso
Cc: Miles Bader
Cc: Chris Zankel
Acked-by: "Luck, Tony"
Cc: Geert Uytterhoeven
Cc: Roman Zippel
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
27 Sep, 2006
1 commit
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um_timer shouldn't add local_offset to the host time since get_time already
did it. This threw off sleep when a settimeofday or equivalent had happened.Signed-off-by: Jeff Dike
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
26 Sep, 2006
2 commits
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timer_irq_inited was useless, so it is removed.
Signed-off-by: Jeff Dike
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
set_interval returns an error instead of panicing if setitimer fails. Some of
its callers now check the return.enable_timer is largely tt-mode-specific, so it is marked as such, and the
only skas-mode caller is made to call set-interval instead.user_time_init was a no-value-added wrapper around set_interval, so it is
gone.Since set_interval is now called from kernel code, callers no longer pass
ITIMER_* to it. Instead, they pass a flag which is converted into ITIMER_REAL
or ITIMER_VIRTUAL.Signed-off-by: Jeff Dike
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
11 Jul, 2006
1 commit
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Move most *_kern.c files in arch/um/kernel to *.c. This makes UML somewhat
more closely resemble the other arches.[akpm@osdl.org: use the new INTF_* flags]
Signed-off-by: Jeff Dike
Cc: Paolo 'Blaisorblade' Giarrusso
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
01 Jul, 2006
1 commit
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Forgot to remove arch/um/kernel/time.c when it was mostly moved to
arch/um/os-Linux.Signed-off-by: Jeff Dike
Cc: Paolo 'Blaisorblade' Giarrusso
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
11 Jan, 2006
1 commit
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- convert posix-timers.c to use hrtimers
- remove the now obsolete abslist code
Signed-off-by: Thomas Gleixner
Signed-off-by: Ingo Molnar
Signed-off-by: Miklos Szeredi
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
09 Jan, 2006
1 commit
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The serial UML OS-abstraction layer patch (um/kernel dir).
This moves all systemcalls from signal_user.c file under os-Linux dir
Signed-off-by: Gennady Sharapov
Signed-off-by: Jeff Dike
Cc: Paolo 'Blaisorblade' Giarrusso
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
08 Jul, 2005
1 commit
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This patch implements the clone-stub mechanism, which allows skas0 to run
with proc_mm==0, even if the clib in UML uses modify_ldt.Note: There is a bug in skas3.v7 host patch, that avoids UML-skas from
running properly on a SMP-box. In full skas3, I never really saw problems,
but in skas0 they showed up.More commentary by jdike - What this patch does is makes sure that the host
parent of each new host process matches the UML parent of the corresponding
UML process. This ensures that any changed LDTs are inherited. This is
done by having clone actually called by the UML process from its stub,
rather than by the kernel. We have special syscall stubs that are loaded
onto the stub code page because that code must be completely
self-contained. These stubs are given C interfaces, and used like normal C
functions, but there are subtleties. Principally, we have to be careful
about stack variables in stub_clone_handler after the clone. The code is
written so that there aren't any - everything boils down to a fixed
address. If there were any locals, references to them after the clone
would be wrong because the stack just changed.Signed-off-by: Bodo Stroesser
Signed-off-by: Jeff Dike
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
26 Jun, 2005
1 commit
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user_time_init_skas and user_time_init_tt were essentially the same. So, this
merges them, deleting the mode-specific functions and declarations.Signed-off-by: Jeff Dike
Cc: Paolo Giarrusso
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
17 Apr, 2005
1 commit
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Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.Let it rip!
