linux.git/include/asm-x86/tsc.h, branch master

x86, um: ... and asm-x86 move

2008-10-23T05:55:20+00:00

Signed-off-by: Al Viro 
Signed-off-by: H. Peter Anvin

x86: consolidate header guards

2008-07-22T19:31:34+00:00

This patch is the result of an automatic script that consolidates the
format of all the headers in include/asm-x86/.

The format:

1. No leading underscore. Names with leading underscores are reserved.
2. Pathname components are separated by two underscores. So we can
   distinguish between mm_types.h and mm/types.h.
3. Everything except letters and numbers are turned into single
   underscores.

Signed-off-by: Vegard Nossum

x86: merge tsc_init and clocksource code

2008-07-09T05:43:27+00:00

Unify the clocksource code.
Unify the tsc_init code.

Signed-off-by: Alok N Kataria 
Signed-off-by: Dan Hecht 
Cc: Dan Hecht 
Signed-off-by: Ingo Molnar

x86: merge tsc calibration

2008-07-09T05:43:25+00:00

Merge the tsc calibration code for the 32bit and 64bit kernel.
The paravirtualized calculate_cpu_khz for 64bit now points to the correct
tsc_calibrate code as in 32bit.
Original native_calculate_cpu_khz for 64 bit is now called as calibrate_cpu.

Also moved the recalibrate_cpu_khz function in the common file.
Note that this function is called only from powernow K7 cpu freq driver.

Signed-off-by: Alok N Kataria 
Signed-off-by: Dan Hecht 
Cc: Dan Hecht 
Signed-off-by: Ingo Molnar

x86: vget_cycles() __always_inline

2008-04-29T11:45:24+00:00

Mark vget_cycles() as __always_inline, so gcc is never tempted to make
the vsyscall vread_tsc() dive into kernel text, with resulting SIGSEGV.

This was a self-inflicted wound: I've not seen that happen with unhacked
sources; but for debug reasons I'd changed my x86/Makefile to compile
no-unit-at-a-time, and that in conjunction with OPTIMIZE_INLINING=y
ended up with vget_cycles() in kernel text.  Perhaps it can happen
in other ways: safer to use __always_inline.

Signed-off-by: Hugh Dickins 
Signed-off-by: Ingo Molnar

"make namespacecheck" fixes

2008-04-24T21:15:44+00:00

Signed-off-by: Ingo Molnar

x86: implement prctl PR_GET_TSC and PR_SET_TSC

2008-04-19T17:19:55+00:00

This patch implements the PR_GET_TSC and PR_SET_TSC prctl()
commands on the x86 platform (both 32 and 64 bit.) These
commands control the ability to read the timestamp counter
from userspace (the RDTSC instruction.)

While the RDTSC instuction is a useful profiling tool,
it is also the source of some non-determinism in ring-3.
For deterministic replay applications it is useful to be
able to trap and emulate (and record the outcome of) this
instruction.

This patch uses code earlier used to disable the timestamp
counter for the SECCOMP framework. A side-effect of this
patch is that the SECCOMP environment will now also disable
the timestamp counter on x86_64 due to the addition of the
TIF_NOTSC define on this platform.

The code which enables/disables the RDTSC instruction during
context switches is in the __switch_to_xtra function, which
already handles other unusual conditions, so normal
performance should not have to suffer from this change.

Signed-off-by: Erik Bosman 
Acked-by: Arjan van de Ven  
Signed-off-by: Ingo Molnar 
Signed-off-by: Thomas Gleixner

include/asm-x86/tsc.h: checkpatch cleanups - formatting only

2008-04-17T15:41:28+00:00

Signed-off-by: Joe Perches 
Signed-off-by: Ingo Molnar

x86: get_cycles() fix

2008-01-30T12:33:24+00:00

Signed-off-by: Ingo Molnar 
Signed-off-by: Thomas Gleixner

x86: convert TSC disabling to generic cpuid disable bitmap

2008-01-30T12:33:20+00:00

Fix from: Ian Campbell 

Signed-off-by: Andi Kleen 
Signed-off-by: Ingo Molnar 
Signed-off-by: Thomas Gleixner