Commit Graph

76 Commits

Author SHA1 Message Date
Andi Kleen 2b16a23538 x86: move X86_FEATURE_CONSTANT_TSC into early cpu feature detection
Need this in the next patch in time_init and that happens early.

This includes a minor fix on i386 where early_intel_workarounds()
[which is now called early_init_intel] really executes early as
the comments say.

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:40 +01:00
Ingo Molnar 6d5f718a49 x86: lfence fix
LFENCE is available on XMM2 or higher Intel CPUs - not XMM or higher...

this caused boot failures on XMM1 & !XMM1 capable CPUs.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:38 +01:00
Andi Kleen 707fa8ed92 x86: Implement support to synchronize RDTSC with LFENCE on Intel CPUs
According to Intel RDTSC can be always synchronized with LFENCE
on all current CPUs. Implement the necessary CPUID bit for that.

It is unclear yet if that is true for all future CPUs too,
but if there's another way the kernel can be always updated.

Cc: asit.k.mallick@intel.com
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:37 +01:00
Andi Kleen de4218634e x86: implement support to synchronize RDTSC through MFENCE on AMD CPUs
According to AMD RDTSC can be synchronized through MFENCE.
Implement the necessary CPUID bit for that.

Cc: andreas.herrmann3@amd.com
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:37 +01:00
Andrew Morton 7271339347 x86: arch/x86/kernel/cpu/mcheck/k7.c checkpatch fixes
#88: FILE: arch/x86/kernel/cpu/mcheck/k7.c:34:
+		rdmsr(MSR_IA32_MC0_STATUS+i*4,low, high);
 		                             ^

ERROR: need space after that ',' (ctx:VxV)
#142: FILE: arch/x86/kernel/cpu/mcheck/p4.c:170:
+		rdmsr(MSR_IA32_MC0_STATUS+i*4,low, high);
 		                             ^

ERROR: need space after that ',' (ctx:VxV)
#180: FILE: arch/x86/kernel/cpu/mcheck/p6.c:34:
+		rdmsr(MSR_IA32_MC0_STATUS+i*4,low, high);
 		                             ^

total: 3 errors, 0 warnings, 114 lines checked

Your patch has style problems, please review.  If any of these errors
are false positives report them to the maintainer, see
CHECKPATCH in MAINTAINERS.

Please run checkpatch prior to sending patches

Cc: Min Zhang <mzhang@mvista.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:13 +01:00
Andrew Morton b912a1c737 x86: arch/x86/kernel/cpu/mcheck/ checkpatch fixes
#40: FILE: arch/x86/kernel/cpu/mcheck/k7.c:46:
+				snprintf (misc, 20, "[%08x%08x]", ahigh, alow);

WARNING: line over 80 characters
#45: FILE: arch/x86/kernel/cpu/mcheck/k7.c:50:
+				snprintf (addr, 24, " at %08x%08x", ahigh, alow);

WARNING: no space between function name and open parenthesis '('
#45: FILE: arch/x86/kernel/cpu/mcheck/k7.c:50:
+				snprintf (addr, 24, " at %08x%08x", ahigh, alow);

WARNING: no space between function name and open parenthesis '('
#48: FILE: arch/x86/kernel/cpu/mcheck/k7.c:52:
+			printk (KERN_EMERG "CPU %d: Bank %d: %08x%08x%s%s\n",

WARNING: no space between function name and open parenthesis '('
#65: FILE: arch/x86/kernel/cpu/mcheck/p4.c:161:
+		printk (KERN_DEBUG "CPU %d: EIP: %08x EFLAGS: %08x\n"

WARNING: no space between function name and open parenthesis '('
#88: FILE: arch/x86/kernel/cpu/mcheck/p4.c:182:
+				snprintf (misc, 20, "[%08x%08x]", ahigh, alow);

WARNING: line over 80 characters
#93: FILE: arch/x86/kernel/cpu/mcheck/p4.c:186:
+				snprintf (addr, 24, " at %08x%08x", ahigh, alow);

WARNING: no space between function name and open parenthesis '('
#93: FILE: arch/x86/kernel/cpu/mcheck/p4.c:186:
+				snprintf (addr, 24, " at %08x%08x", ahigh, alow);

WARNING: no space between function name and open parenthesis '('
#96: FILE: arch/x86/kernel/cpu/mcheck/p4.c:188:
+			printk (KERN_EMERG "CPU %d: Bank %d: %08x%08x%s%s\n",

WARNING: no space between function name and open parenthesis '('
#120: FILE: arch/x86/kernel/cpu/mcheck/p6.c:46:
+				snprintf (misc, 20, "[%08x%08x]", ahigh, alow);

WARNING: line over 80 characters
#125: FILE: arch/x86/kernel/cpu/mcheck/p6.c:50:
+				snprintf (addr, 24, " at %08x%08x", ahigh, alow);

WARNING: no space between function name and open parenthesis '('
#125: FILE: arch/x86/kernel/cpu/mcheck/p6.c:50:
+				snprintf (addr, 24, " at %08x%08x", ahigh, alow);

WARNING: no space between function name and open parenthesis '('
#128: FILE: arch/x86/kernel/cpu/mcheck/p6.c:52:
+			printk (KERN_EMERG "CPU %d: Bank %d: %08x%08x%s%s\n",

total: 0 errors, 13 warnings, 100 lines checked

Your patch has style problems, please review.  If any of these errors
are false positives report them to the maintainer, see
CHECKPATCH in MAINTAINERS.

Please run checkpatch prior to sending patches

Cc: Min Zhang <mzhang@mvista.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:12 +01:00
Min Zhang 9e8b6d90ac arch/x86/kernel/cpu/mcheck/p4.c: cleanups
SMP, the machine check exception dispatches all logical processors within a
physical package to the machine-check exception handler, so the printk
within each handler outputs concurrently and makes the output unreadable.
Refer to Intel system programming guide Part 1 Section 7.8.5
http://developer.intel.com/design/processor/manuals/253668.pdf

Signed-off-by: Min Zhang <mzhang@mvista.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:11 +01:00
Glauber de Oliveira Costa 1a53905add x86: move definitions to processor.h
This patch moves definitions that are present in only one of the files
(between processor_32.h and processor_64.h), to processor.h. They're mostly
structures and function definitions.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:31:39 +01:00
Glauber de Oliveira Costa 5300db887e x86: unify x86_cpuinfo struct.
x86_cpuinfo is one more to the family of "not fundamentally different"
structs. It's unified in processor.h, with very specific fields enclosed
around ifdefs.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:31:33 +01:00
Jan Beulich 22f5991c85 x86-64: honor notify_die() returning NOTIFY_STOP
This requires making die() return a value, making its callers honor
this (and be prepared that it may return), and making oops_end() have
two additional parameters.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:31:23 +01:00
Daniel Walker 8c8b8859b6 mcheck mce_64: mce_read_sem to mutex
Converted to a mutex, and changed the name to mce_read_mutex.

Signed-off-by: Daniel Walker <dwalker@mvista.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:31:17 +01:00
Harvey Harrison 75604d7f7f x86: remove all definitions with fastcall
fastcall is always defined to be empty, remove it from arch/x86

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:31:17 +01:00
Glauber de Oliveira Costa 6b68f01baa x86: unify struct desc_ptr
This patch unifies struct desc_ptr between i386 and x86_64.
They can be expressed in the exact same way in C code, only
having to change the name of one of them. As Xgt_desc_struct
is ugly and big, this is the one that goes away.

There's also a padding field in i386, but it is not really
needed in the C structure definition.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:31:12 +01:00
Glauber de Oliveira Costa 6842ef0e85 x86: unify desc_struct
This patch aims to make the access of struct desc_struct variables
equal across architectures. In this patch, I unify the i386 and x86_64
versions under an anonymous union, keeping the way they are accessed
untouched (a and b for 32-bit code, individual bit-fields for 64-bit).

This solution is not beautiful, but will allow us to integrate common
code that differed by the way descriptors were used. This is to be viewed
incrementally. There's simply too much code to be fixed at once.

In the future, goal is to set up in a single way of acessing
the desc_struct fields.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:31:11 +01:00
Markus Metzger eee3af4a2c x86, ptrace: support for branch trace store(BTS)
Resend using different mail client

Changes to the last version:
- split implementation into two layers: ds/bts and ptrace
- renamed TIF's
- save/restore ds save area msr in __switch_to_xtra()
- make block-stepping only look at BTF bit

Signed-off-by: Markus Metzger <markus.t.metzger@intel.com>
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:31:09 +01:00
H. Peter Anvin faca62273b x86: use generic register name in the thread and tss structures
This changes size-specific register names (eip/rip, esp/rsp, etc.) to
generic names in the thread and tss structures.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:31:02 +01:00
H. Peter Anvin 65ea5b0349 x86: rename the struct pt_regs members for 32/64-bit consistency
We have a lot of code which differs only by the naming of specific
members of structures that contain registers.  In order to enable
additional unifications, this patch drops the e- or r- size prefix
from the register names in struct pt_regs, and drops the x- prefixes
for segment registers on the 32-bit side.

This patch also performs the equivalent renames in some additional
places that might be candidates for unification in the future.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:30:56 +01:00
Jeremy Fitzhardinge 53756d3722 x86: add set/clear_cpu_cap operations
The patch to suppress bitops-related warnings added a pile of ugly
casts.  Many of these were related to the management of x86 CPU
capabilities.  Clean these up by adding specific set/clear_cpu_cap
macros, and use them consistently.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Cc: Andi Kleen <ak@suse.de>

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:30:55 +01:00
Mathieu Desnoyers 2c0b8a7578 x86: fall back on interrupt disable in cmpxchg8b on 80386 and 80486
Actually, on 386, cmpxchg and cmpxchg_local fall back on
cmpxchg_386_u8/16/32: it disables interruptions around non atomic
updates to mimic the cmpxchg behavior.

The comment:
/* Poor man's cmpxchg for 386. Unsuitable for SMP */

already present in cmpxchg_386_u32 tells much about how this cmpxchg
implementation should not be used in a SMP context. However, the cmpxchg_local
can perfectly use this fallback, since it only needs to be atomic wrt the local
cpu.

This patch adds a cmpxchg_486_u64 and uses it as a fallback for cmpxchg64
and cmpxchg64_local on 80386 and 80486.

Q:
but why is it called cmpxchg_486 when the other functions are called

A:
Because the standard cmpxchg is missing only on 386, but cmpxchg8b is
missing both on 386 and 486.

Citing Intel's Instruction set reference:

cmpxchg:
This instruction is not supported on Intel processors earlier than the
Intel486 processors.

cmpxchg8b:
This instruction encoding is not supported on Intel processors earlier
than the Pentium processors.

Q:
What's the reason to have cmpxchg64_local on 32 bit architectures?
Without that need all this would just be a few simple defines.

A:
cmpxchg64_local on 32 bits architectures takes unsigned long long
parameters, but cmpxchg_local only takes longs. Since we have cmpxchg8b
to execute a 8 byte cmpxchg atomically on pentium and +, it makes sense
to provide a flavor of cmpxchg and cmpxchg_local using this instruction.

Also, for 32 bits architectures lacking the 64 bits atomic cmpxchg, it
makes sense _not_ to define cmpxchg64 while cmpxchg could still be
available.

Moreover, the fallback for cmpxchg8b on i386 for 386 and 486 is a

However, cmpxchg64_local will be emulated by disabling interrupts on all
architectures where it is not supported atomically.

Therefore, we *could* turn cmpxchg64_local into a cmpxchg_local, but it
would make the 386/486 fallbacks ugly, make its design different from
cmpxchg/cmpxchg64 (which really depends on atomic operations and cannot
be emulated) and require the __cmpxchg_local to be expressed as a macro
rather than an inline function so the parameters would not be fixed to
unsigned long long in every case.

So I think cmpxchg64_local makes sense there, but I am open to
suggestions.

Q:
Are there any callers?

A:
I am actually using it in LTTng in my timestamping code. I use it to
work around CPUs with asynchronous TSCs. I need to update 64 bits
values atomically on this 32 bits architecture.

Changelog:
- Ran though checkpatch.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:30:47 +01:00
Robert Richter 7b83dae7aa x86: extended interrupt LVT support for AMD Barcelona
Also macro definitions in apicdef.h has been updated.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:30:40 +01:00
Dave Jones 7ebad70534 x86: use CR0 defines.
Signed-off-by: Dave Jones <davej@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-01-30 13:30:39 +01:00
Paul Jimenez 2d2ee8de5f x86: mtrr use type bool [RESEND AGAIN]
This is a janitorish patch to 1) remove private TRUE/FALSE #def's in
favor of using the standard enum from linux/stddef.h and 2) switch the
variables holding those values to type 'bool' (from linux/types.h)
since it both seems more appropriate and allows for potentially better
optimization.

As a truly minor aside, I removed a couple of comments documenting
a 'do_safe' parameter that seems to no longer exist.

Signed-off-by: Paul Jimenez <pj@place.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:30:31 +01:00
Adrian Bunk 231fd906c5 x86 mce_64.c: make struct mcelog static
This patch makes the needlessly global struct mcelog static.

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-01-30 13:30:30 +01:00
Thomas Gleixner 3abf024d2a x86: nuke a ton of unused exports
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-01-30 13:30:28 +01:00
Greg KH 213eca7f48 kobj: fix threshold_init_device/kobject_uevent_env oops
the logic in this function is just crazy.  It's recursive, but we
can circumvent the creation for the kobject and whole creation of the
threshold_block if some conditions are met.  That's why we see the
allocate_threshold_blocks so many times in the callstack, yet only a few
kobjects created.

Then we blow up in kobject_uevent_env() on the first debug printk.
Which means that we are just passing in garbage.

Man, this is one time that comments in code would have been very nice to
have, and why forward goto's into major code blocks are just evil...

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:29:58 +01:00
Gautham R Shenoy 86ef5c9a8e cpu-hotplug: replace lock_cpu_hotplug() with get_online_cpus()
Replace all lock_cpu_hotplug/unlock_cpu_hotplug from the kernel and use
get_online_cpus and put_online_cpus instead as it highlights the
refcount semantics in these operations.

The new API guarantees protection against the cpu-hotplug operation, but
it doesn't guarantee serialized access to any of the local data
structures. Hence the changes needs to be reviewed.

In case of pseries_add_processor/pseries_remove_processor, use
cpu_maps_update_begin()/cpu_maps_update_done() as we're modifying the
cpu_present_map there.

Signed-off-by: Gautham R Shenoy <ego@in.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-01-25 21:08:02 +01:00
Kay Sievers af5ca3f4ec Driver core: change sysdev classes to use dynamic kobject names
All kobjects require a dynamically allocated name now. We no longer
need to keep track if the name is statically assigned, we can just
unconditionally free() all kobject names on cleanup.

Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-01-24 20:40:40 -08:00
Greg Kroah-Hartman 38a382ae5d Kobject: convert arch/* from kobject_unregister() to kobject_put()
There is no need for kobject_unregister() anymore, thanks to Kay's
kobject cleanup changes, so replace all instances of it with
kobject_put().


Cc: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-01-24 20:40:39 -08:00
Greg Kroah-Hartman 542eb75a27 Kobject: change arch/x86/kernel/cpu/mcheck/mce_amd_64.c to use kobject_init_and_add
Stop using kobject_register, as this way we can control the sending of
the uevent properly, after everything is properly initialized.

Cc: Jacob Shin <jacob.shin@amd.com>
Cc: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-01-24 20:40:30 -08:00
Greg Kroah-Hartman a521cf209c Kobject: change arch/x86/kernel/cpu/mcheck/mce_amd_64.c to use kobject_create_and_add
Make this kobject dynamic and convert it to not use kobject_register,
which is going away.

Cc: Jacob Shin <jacob.shin@amd.com>
Cc: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-01-24 20:40:30 -08:00
Greg Kroah-Hartman 5b3f355d8f Kobject: change arch/x86/kernel/cpu/intel_cacheinfo.c to use kobject_init_and_add
Stop using kobject_register, as this way we can control the sending of
the uevent properly, after everything is properly initialized.

Cc: Ashok Raj <ashok.raj@intel.com>
Cc: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-01-24 20:40:28 -08:00
Jason Gaston 04fa11ea17 x86: intel_cacheinfo.c: cpu cache info entry for Intel Tolapai
This patch adds a cpu cache info entry for the Intel Tolapai cpu.

Signed-off-by: Jason Gaston <jason.d.gaston@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2007-12-21 01:27:19 +01:00
Adrian Bunk f22d9bc1e8 x86: free_cache_attributes() section fix
free_cache_attributes() must be __cpuinit since it calls the
__cpuinit cache_remove_shared_cpu_map().

This patch fixes the following section mismatch reported by
Chris Clayton:

 ...
 WARNING: vmlinux.o(.text+0x90b6): Section mismatch: reference to .init.text:cache_remove_shared_cpu_map (between 'free_cache_attributes' and 'show_level')
 ...

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2007-12-04 17:19:07 +01:00
Andreas Herrmann c0c52d28e0 x86: show cpuinfo only for online CPUs
Fix regressions introduced with 92cb7612ae.

It can happen that cpuinfo is displayed for CPUs that are not online or
even worse for CPUs not present at all. As an example, following was
shown for a "second" CPU of a single core K8 variant:

    processor       : 0
    vendor_id       : unknown
    cpu family      : 0
    model           : 0
    model name      : unknown
    stepping        : 0
    cache size      : 0 KB
    fpu             : yes
    fpu_exception   : yes
    cpuid level     : 0
    wp              : yes
    flags           :
    bogomips        : 0.00
    clflush size    : 0
    cache_alignment : 0
    address sizes   : 0 bits physical, 0 bits virtual
    power management:

Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2007-11-17 16:27:00 +01:00
Andreas Herrmann 903675569e x86: fix cpu-hotplug regression
Commit d435d862ba
("cpu hotplug: mce: fix cpu hotplug error handling")
changed the error handling in mce_cpu_callback.

In cases where not all CPUs are brought up during
boot (e.g. using maxcpus and additional_cpus parameters)
mce_cpu_callback now returns NOTFIY_BAD because
for such CPUs cpu_data is not completely filled when
the notifier is called. Thus mce_create_device fails right
at its beginning:

        if (!mce_available(&cpu_data[cpu]))
                return -EIO;

As a quick fix I suggest to check boot_cpu_data for MCE.

To reproduce this regression:

(1) boot with maxcpus=2 addtional_cpus=2 on a 4 CPU x86-64 system
(2) # echo 1 >/sys/devices/system/cpu/cpu2/online
  -bash: echo: write error: Invalid argument

dmesg shows:

_cpu_up: attempt to bring up CPU 2 failed

Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2007-11-17 16:27:00 +01:00
Linus Torvalds 4c5cdb1e1f Merge master.kernel.org:/pub/scm/linux/kernel/git/davej/cpufreq
* master.kernel.org:/pub/scm/linux/kernel/git/davej/cpufreq:
  [CPUFREQ] Fix up whitespace in conservative governor.
  [CPUFREQ] Make cpufreq_conservative handle out-of-sync events properly
  [CPUFREQ] architectural pstate driver for powernow-k8
2007-11-16 18:30:26 -08:00
Linus Torvalds a052f44736 Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/x86
* git://git.kernel.org/pub/scm/linux/kernel/git/sam/x86:
  x86: enable "make ARCH=x86"
  x86: do not use $(ARCH) when not needed
  kconfig: use $K64BIT to set 64BIT with all*config targets
  kconfig: add helper to set config symbol from environment variable
  kconfig: factor out code in confdata.c
  x86: move the rest of the menu's to Kconfig
  x86: move all simple arch settings to Kconfig
  x86: copy x86_64 specific Kconfig symbols to Kconfig.i386
  x86: add X86_64 dependency to x86_64 specific symbols in Kconfig.x86_64
  x86: add X86_32 dependency to i386 specific symbols in Kconfig.i386
  x86: arch/x86/Kconfig.cpu unification
  x86: start unification of arch/x86/Kconfig.*
  x86: unification of cfufreq/Kconfig
2007-11-14 18:53:11 -08:00
Andreas Herrmann bae19fe033 x86: don't call mce_create_device on CPU_UP_PREPARE
Fix regression introduced with d435d862ba
("cpu hotplug: mce: fix cpu hotplug error handling").

A CPU which was not brought up during boot (using maxcpus and
additional_cpus parameters) couldn't be onlined anymore.  For such a CPU it
seemed that MCE was not supported during CPU_UP_PREPARE-time which caused
mce_cpu_callback to return NOTIFY_BAD to notifier_call_chain.  To fix this
we:

 - call mce_create_device for CPU_ONLINE event (instead of CPU_UP_PREPARE),
 - avoid mce_remove_device() for the CPU that is not correctly initialized
   by mce_create_device() failure,
 - make mce_cpu_callback always return NOTIFY_OK for CPU_ONLINE event.
   Because CPU_ONLINE callback return value is always ignored.

[akinobu.mita@gmail.com: avoid mce_remove_device() for not initialized device]
[akinobu.mita@gmail.com: make mce_cpu_callback always return NOTIFY_OK]
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-11-14 18:45:44 -08:00
Sam Ravnborg e8ef95227a x86: unification of cfufreq/Kconfig
Merge the two Kconfig files to a single file.

Checked using make allmodconfig for x86_64.
No changes in build.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Adrian Bunk <bunk@kernel.org>
Cc: Dave Jones <davej@codemonkey.org.uk>
2007-11-12 21:02:18 +01:00
Ingo Molnar 4e2947f125 x86: make ipi_handler() always defined
prepare for up_smp_call_function() to ensure that the 'func'
pointer is unused. (which is related to a KVM build fix)

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-11-09 22:39:38 +01:00
H. Peter Anvin e1054b39b2 x86: additional CPUID strings; fix strings for AMD-ecx
Additional CPUID strings (sse4_1, sse4_2, sse5, skinit, wdt); fix the
positioning of the AMD ecx strings (cr8_legacy was duplicated under
two different names, so the alignment of all the other strings were
off by one.)

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-10-30 00:22:22 +01:00
Thomas Gleixner d88203d1ab x86: whitespace cleanup of mce_64.c
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2007-10-23 22:37:23 +02:00
Thomas Gleixner 01e11182e7 x86: consolidate the cpu/ related code usage
The x86_64 arch/x86/kernel/Makefile uses references into 
arch/x86/kernel/cpu/... to use code from there.

Unifiy it with the nicely structured i386 way and reuse the existing
subdirectory make rules.

Also move the machine check related source into ...kernel/cpu/mcheck,
where the other machine check related code is.

No code change.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-10-23 22:37:23 +02:00
Thomas Gleixner 3bc258ad87 x86: prepare consolidation of cpu/ related code usage
Move mce.c to mce_32.c to allow the later move of the x86_64 mce.c
from arch/x86/kernel/ to ...kernel/cpu/mcheck

No code change.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-10-23 22:37:23 +02:00
Thomas Gleixner 34d19e29c9 x86: prepare consolidation of cpu/ related Makefiles
Prepare the makefiles in x86/kernel/cpu and x86/kernel/cpu/mcheck to
be used by the x86_64 build as well.

No code change.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-10-23 22:37:23 +02:00
Mark Langsdorf c5829cd07e [CPUFREQ] architectural pstate driver for powernow-k8
This patch should apply cleanly to the 2.6.23-git7 kernel.  It changes the
powernow-k8 driver code that deals with 3rd generation Opteron, Phenom,
and later processors to match the architectural pstate driver described
in the AMD64 Architecture Programmer's Manual Volume 2 Chapter 18.  The
initial implementation of the hardware pstate driver for PowerNow!
used some processor-version specific features, and would not be
maintainable in the long term as the processor features changed.
This architectural driver should work on all future AMD processors.
 
Signed-off-by: Mark Langsdorf <mark.langsdorf@amd.com>
Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
Signed-off-by: Dave Jones <davej@redhat.com>
2007-10-22 16:30:33 -04:00
Linus Torvalds c00046c279 Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial
* git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial: (74 commits)
  fix do_sys_open() prototype
  sysfs: trivial: fix sysfs_create_file kerneldoc spelling mistake
  Documentation: Fix typo in SubmitChecklist.
  Typo: depricated -> deprecated
  Add missing profile=kvm option to Documentation/kernel-parameters.txt
  fix typo about TBI in e1000 comment
  proc.txt: Add /proc/stat field
  small documentation fixes
  Fix compiler warning in smount example program from sharedsubtree.txt
  docs/sysfs: add missing word to sysfs attribute explanation
  documentation/ext3: grammar fixes
  Documentation/java.txt: typo and grammar fixes
  Documentation/filesystems/vfs.txt: typo fix
  include/asm-*/system.h: remove unused set_rmb(), set_wmb() macros
  trivial copy_data_pages() tidy up
  Fix typo in arch/x86/kernel/tsc_32.c
  file link fix for Pegasus USB net driver help
  remove unused return within void return function
  Typo fixes retrun -> return
  x86 hpet.h: remove broken links
  ...
2007-10-19 20:36:17 -07:00
Simon Arlott 27b46d7661 spelling fixes: arch/i386/
Spelling fixes in arch/i386/.

Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Adrian Bunk <bunk@kernel.org>
2007-10-20 01:13:56 +02:00
Marcin Garski db955170d4 more UTF-8 conversions
Signed-off-by: Adrian Bunk <bunk@kernel.org>
2007-10-19 23:22:11 +02:00
Jan Engelhardt 96de0e252c Convert files to UTF-8 and some cleanups
* Convert files to UTF-8.

  * Also correct some people's names
    (one example is Eißfeldt, which was found in a source file.
    Given that the author used an ß at all in a source file
    indicates that the real name has in fact a 'ß' and not an 'ss',
    which is commonly used as a substitute for 'ß' when limited to
    7bit.)

  * Correct town names (Goettingen -> Göttingen)

  * Update Eberhard Mönkeberg's address (http://lkml.org/lkml/2007/1/8/313)

Signed-off-by: Jan Engelhardt <jengelh@gmx.de>
Signed-off-by: Adrian Bunk <bunk@kernel.org>
2007-10-19 23:21:04 +02:00