Move the 32-bit and 64-bit gdt_page definitions next to each
other, separated with an #ifdef.
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Make the files more similar in preparation to unification, no
code changed.
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
64-bit has X86_HT set too, so use that instead of SMP.
This also removes a include/asm-x86/processor.h ifdef.
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This patch fixes a problem within the SH implementation of resume_kernel code,
that implements in assembly the bulk of preempt_schedule_irq function without
taking care of the extra code needed to handle the BKL preemptible.
The patch basically consists of removing this asm code and calling the common
C implementation (see kernel/sched.c) as other archs do.
Another change is the missing 'cli' macro invocation at the beginning of
the resume_kernel.
Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Currently, there are two different fields in the
mv643xx_eth_platform_data struct that together describe the PHY
address -- one field (phy_addr) has the address of the PHY, but if
that address is zero, a second field (force_phy_addr) needs to be
set to distinguish the actual address zero from a zero due to not
having filled in the PHY address explicitly (which should mean
'use the default PHY address').
If we are a bit smarter about the encoding of the phy_addr field,
we can avoid the need for a second field -- this patch does that.
Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Which top-level unit's SMI interface to use should be a property of
the top-level unit, not of the individual ports. This patch moves the
->shared_smi pointer from the per-port platform data to the global
platform data.
Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
We currently have a race for a free SPE. With one thread doing a
spu_yield(), and another doing a spu_activate():
thread 1 thread 2
spu_yield(oldctx) spu_activate(ctx)
__spu_deactivate(oldctx)
spu_unschedule(oldctx, spu)
spu->alloc_state = SPU_FREE
spu = spu_get_idle(ctx)
- searches for a SPE in
state SPU_FREE, gets
the context just
freed by thread 1
spu_schedule(ctx, spu)
spu->alloc_state = SPU_USED
spu_schedule(newctx, spu)
- assumes spu is still free
- tries to schedule context on
already-used spu
This change introduces a 'free_spu' flag to spu_unschedule, to indicate
whether or not the function should free the spu after descheduling the
context. We only set this flag if we're not going to re-schedule
another context on this SPU.
Add a comment to document this behaviour.
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Commit 8d5636fbca introduced a reference
count on SPU contexts during find_victim, but this may cause a leak in
the reference count if we later find a better contender for a context to
unschedule.
Change the reference to after we've found our victim context, so we
don't do the extra get_spu_context().
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
mcbsp is confused as to what takes a physical or virtual address.
Fix the two instances where it gets it wrong.
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Introduce a fast TSC-calibration method on sane hardware.
It only uses 17920 PIT timer ticks to calibrate the TSC, plus 256 ticks on
each side to make sure the TSC values were very close to the tick, so the
whole calibration takes 15ms. Yet, despite only takign 15ms,
we can actually give pretty stringent guarantees of accuracy:
- the code requires that we hit each 256-counter block at least 50 times,
so the TSC error is basically at *MOST* just a few PIT cycles off in
any direction. In practice, it's going to be about one microseconds
off (which is how long it takes to read the counter)
- so over 17920 PIT cycles, we can pretty much guarantee that the
calibration error is less than one half of a percent.
My testing bears this out: on my machine, the quick-calibration reports
2934.085kHz, while the slow one reports 2933.415.
Yes, the slower calibration is still more precise. For me, the slow
calibration is stable to within about one hundreth of a percent, so it's
(at a guess) roughly an order-and-a-half of magnitude more precise. The
longer you wait, the more precise you can be.
However, the nice thing about the fast TSC PIT synchronization is that
it's pretty much _guaranteed_ to give that 0.5% precision, and fail
gracefully (and very quickly) if it doesn't get it. And it really is
fairly simple (even if there's a lot of _details_ there, and I didn't get
all of those right ont he first try or even the second ;)
The patch says "110 insertions", but 63 of those new lines are actually
comments.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
arch/x86/kernel/tsc.c | 111 ++++++++++++++++++++++++++++++++++++++++++++++++-
1 files changed, 110 insertions(+), 1 deletions(-)
1. add c_x86_vendor into cpu_dev
2. change cpu_devs to static
3. check c_x86_vendor before put that cpu_dev into array
4. remove alignment for 64bit
5. order the sequence in cpu_devs according to link sequence...
so could put intel at first, then amd...
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
v2: make 64 bit get c->x86_cache_alignment = c->x86_clfush_size
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
1. add extended_cpuid_level for 32bit
2. add generic_identify for 64bit
3. add early_identify_cpu for 32bit
4. early_identify_cpu not be called by identify_cpu
5. remove early in get_cpu_vendor for 32bit
6. add get_cpu_cap
7. add cpu_detect for 64bit
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Move early cpu initialization after cpu early get cap so the
early cpu initialization can fix up cpu caps.
Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Krzysztof Helt found MTRR is not detected on k6-2
root cause:
we moved mtrr_bp_init() early for mtrr trimming,
and in early_detect we only read the CPU capability from cpuid,
so some cpu doesn't have that bit in cpuid.
So we need to add early_init_xxxx to preset those bit before mtrr_bp_init
for those earlier cpus.
this patch is for v2.6.27
Reported-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
try to insert_resource second time, by expanding the resource...
for case: e820 reserved entry is partially overlapped with bar res...
hope it will never happen
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Impact: aestetic
Capitalize function call interrupts consistently.
All other descriptions in /proc/interrupts are capitalized except
for "function call interrupts". Capitalize it too for consistency.
While that's technically a published ABI I think the risk of anyone
relying on that text to stay the same is negligible.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Impact: performance optimization
I did some rebenchmarking with modern compilers and dropping
-funroll-loops makes the function consistently go faster by a few
percent. So drop that flag.
Thanks to Richard Guenther for a hint.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
this one replaces:
| commit a2bd7274b4
| Author: Yinghai Lu <yhlu.kernel@gmail.com>
| Date: Mon Aug 25 00:56:08 2008 -0700
|
| x86: fix HPET regression in 2.6.26 versus 2.6.25, check hpet against BAR, v3
v2: insert e820 reserve resources before pnp_system_init
v3: fix merging problem in tip/x86/core
v4: address Linus's review about comments and condition in _late()
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
so could let BAR res register at first, or even pnp.
v2: insert e820 reserve resources before pnp_system_init
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
The last changes made the calibration loop 250ms long which is far
too much. Try to do that more clever.
Experiments have shown that using a 10ms delay for the PIT based calibration
gives us a good enough value. If we have a reference (HPET/PMTIMER) and the
result of the PIT and the reference is close enough, then we can break out of
the calibration loop on a match right away and use the reference value.
Otherwise we just loop 3 times and decide then, which value to take.
One caveat is that for virtualized environments the PIT calibration often does
not work at all and I found out that 10us is a bit too short as well for the
reference to give a sane result. The solution here is to make the last loop
longer when the first two PIT calibrations failed.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
The Kbuild variable "targets" is supposed to be
configuration-independent and reflect "all possible targets". This is
required to make "make clean" work properly.
Therefore, move all manipulation of "targets" as well as custom rules
out of the x86-32 ifdef statement. Only leave inside the ifdefs the
things that are genuinely configuration-dependent.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
The driver(s) below do not use LINUX_VERSION_CODE nor KERNEL_VERSION.
arch/arm/plat-mxc/clock.c
This patch removes the said #include <version.h>.
Signed-off-by: Huang Weiyi <weiyi.huang@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
At the moment, 64-bit platforms (other than Alpha) are all redefining
things for themselves instead of using <asm-generic/statfs.h>.
As is ARM, since it has special requirements w.r.t. padding.
Make <asm-generic/statfs.h> more generic, and they can use it directly.
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
