Commit graph

1752 commits

Author SHA1 Message Date
Yinghai Lu
d2dbf34332 x86: clean up reserve_bootmem_generic() and port it to 32-bit
1. add reserve_bootmem_generic for 32bit
2. change len to unsigned long
3. make early_res_to_bootmem to use it

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08 10:36:17 +02:00
Yinghai Lu
b1f006b65c x86: make generic arch support NUMAQ, fix #2
we are checking mptable early for numaq, so don't need to reserve_bootmem
for it. bootmem is not there yet.

do the same thing as 64-bit.

found it on 64g above system from 64-bit kernel kexec to 32 bit kernel with
numaq support.

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08 10:36:04 +02:00
Yinghai Lu
ab4a465e96 x86: e820 merge parsing of the mem=/memmap= boot parameters
since we now have 32-bit support for e820_register_active_regions(),
we can merge the parsing of the mem=/memmap= boot parameters.

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08 10:35:38 +02:00
Ingo Molnar
df5f6c212c x86: unify the reserve_bootmem() behavior of early_res_to_bootmem()
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08 10:35:31 +02:00
Bernhard Walle
12448e3ef3 x86: use reserve_bootmem_generic() to reserve crashkernel memory on x86_64
This patch uses reserve_bootmem_generic() instead of reserve_bootmem()
to reserve the crashkernel memory on x86_64. That's necessary for NUMA
machines, see 00212fef81:

  [PATCH] Fix kdump Crash Kernel boot memory reservation for NUMA machines

  This patch will fix a boot memory reservation bug that trashes memory on
  the ES7000 when loading the kdump crash kernel.

  The code in arch/x86_64/kernel/setup.c to reserve boot memory for the crash
  kernel uses the non-numa aware "reserve_bootmem" function instead of the
  NUMA aware "reserve_bootmem_generic".  I checked to make sure that no other
  function was using "reserve_bootmem" and found none, except the ones that
  had NUMA ifdef'ed out.

  I have tested this patch only on an ES7000 with NUMA on and off (numa=off)
  in a single (non-NUMA) and multi-cell (NUMA) configurations.

  Signed-off-by: Amul Shah <amul.shah@unisys.com>
  Looks-good-to: Vivek Goyal <vgoyal@in.ibm.com>
  Cc: Andi Kleen <ak@muc.de>
  Signed-off-by: Andrew Morton <akpm@osdl.org>
  Signed-off-by: Linus Torvalds <torvalds@osdl.org>

The switch-back to reserve_bootmem() was accidentally introduced in
5c3391f9f7 when adding the BOOTMEM_EXCLUSIVE
parameter.

Signed-off-by: Bernhard Walle <bwalle@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08 10:35:13 +02:00
Bernhard Walle
8b2ef1d728 x86: add flags parameter to reserve_bootmem_generic()
This patch adds a 'flags' parameter to reserve_bootmem_generic() like it
already has been added in reserve_bootmem() with commit
72a7fe3967.

It also changes all users to use BOOTMEM_DEFAULT, which doesn't effectively
change the behaviour. Since the change is x86-specific, I don't think it's
necessary to add a new API for migration. There are only 4 users of that
function.

The change is necessary for the next patch, using reserve_bootmem_generic()
for crashkernel reservation.

Signed-off-by: Bernhard Walle <bwalle@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08 10:34:54 +02:00
Ingo Molnar
896395c290 Merge branch 'linus' into tmp.x86.mpparse.new 2008-07-08 10:32:56 +02:00
Ingo Molnar
1b8ba39a3f Merge branch 'x86/irq' into x86/devel
Conflicts:

	arch/x86/kernel/i8259.c
	arch/x86/kernel/irqinit_64.c

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08 09:53:57 +02:00
Ingo Molnar
58cf35228f Merge branches 'x86/mmio', 'x86/delay', 'x86/idle', 'x86/oprofile', 'x86/debug', 'x86/ptrace' and 'x86/amd-iommu' into x86/devel 2008-07-08 09:46:15 +02:00
Ingo Molnar
6924d1ab8b Merge branches 'x86/numa-fixes', 'x86/apic', 'x86/apm', 'x86/bitops', 'x86/build', 'x86/cleanups', 'x86/cpa', 'x86/cpu', 'x86/defconfig', 'x86/gart', 'x86/i8259', 'x86/intel', 'x86/irqstats', 'x86/kconfig', 'x86/ldt', 'x86/mce', 'x86/memtest', 'x86/pat', 'x86/ptemask', 'x86/resumetrace', 'x86/threadinfo', 'x86/timers', 'x86/vdso' and 'x86/xen' into x86/devel 2008-07-08 09:16:56 +02:00
Christophe Jaillet
25556c1699 x86, arch/x86/kernel/io_apic_32.c: use kzalloc instead of kmalloc/memset
1) replace kmalloc/memset with equivalent kzalloc.

Signed-off-by: Christophe Jaillet <jaillet.christophe@wanadoo.fr>
Cc: cj <jaillet.christophe@wanadoo.fr>
Cc: petero2@telia.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08 09:13:25 +02:00
Maciej W. Rozycki
7f0dbbc08d x86: fix IO APIC breakage on HP nx6325, v2
> That helped a lot, the system seems to work normally now.
>
> Here's the relevant snippet from dmesg:
>
> [    0.108006] ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1
> [    0.108006] ..MP-BIOS bug: 8254 timer not connected to IO-APIC
> [    0.108006] ...trying to set up timer (IRQ0) through the 8259A ... <3>
> [    0.108006] ..... (found apic 0 pin 2) ...<3> failed.
> [    0.108006] ...trying to set up timer as Virtual Wire IRQ...<3> works.
>
> and the whole thing is at: http://www.sisk.pl/kernel/debug/20080618/dmesg-2.log

 Hmm, that only proved the 8259A is indeed wired to the pin #2 of the I/O
APIC.

> I, personally, don't have any and AMD only has SB600 documentation on its
> web page (it's still marked as "AMD confidential" ;-)).

 Well, the IC block is most likely the same as that's not rocket science
and once done there is no need to fiddle with that.  That written, I am
afraid there is nothing useful about the IC in the document, except that
it's there and consists of an I/O APIC providing 24 inputs and the usual
pair of 8259A cores.  Thanks for the reference anyway.

> There is an interrupt controller in there, but I'm not sure if there's any
> 8259A.  The northbridge is on the CPU, actually.

 I will praise the day someone ships an x86 machine without an 8259A core!

 As expressed in another mail I suspect there may actually be a direct
route from the 8254 to INTIN0 in the southbridge -- this is what other
bootstrap logs seen in the Internet suggest.  This would mean this
particular BIOS is buggy (is it the latest version?) and provides an
incorrect IRQ override in its ACPI tables, for example because the
responsible block has been blindly copied from a machine using a commoner
wiring.  This could be moderately easily fixed up with a quirk based on
the PCI ID (after checking it again, we actually used to have a quirk for
ATI in this area, but the way it was done suggests the issue was not
understood well enough).

 Could you please remove the hack sent yesterday and test the patch
provided below?  I do hope it builds, but I have no immediate means to
check it.  Please report the output.  The intent is to test INTIN0
directly before testing INTIN2 through the 8259A.  Thanks.

 Aside of that, what I have gathered from your reports (please correct me
if I have got it wrong) is that when the through-8259A mode is used, then
after a while 8254 timer interrupts stop arriving.  What's interesting,
the "Virtual Wire IRQ" seems to work for you correctly (that's quite an
odd setup where a local APIC input is used in the native mode -- please
post /proc/interrupts for confirmation), which in turn implies the master
8259A drives its INT output as we expect.  Why would the I/O APIC input
have problems then?  Hmm...

[ mingo@elte.hu: revert the "x86: fix IO APIC breakage on HP nx6325"
  version. ]

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08 09:13:24 +02:00
Maciej W. Rozycki
cd08d0754e x86: fix IO APIC breakage on HP nx6325
On Thu, 19 Jun 2008, Rafael J. Wysocki wrote:

> >  With such a configuration the "x86: I/O APIC: timer through 8259A
> > second-chance" patch should not matter, because the only change it
> > introduces is an attempt to try the same I/O APIC pin again, but with the
> > IRQ0 line of the master 8259A enabled.  That's not a terribly unusual
> > configuration and nothing should get confused in the system.
>
> But it _does_ get confused, really.

 Something certainly gets confused, but so far I am not sure which bit
exactly it is, are you?

> >  Barring the unlikely possibility of the 8259A actually being wired to
> > INTIN2 of the I/O APIC I can see two possible explanations:
> >
> > 1. The 8259A interrupt actually escapes to the CPU somehow and is handled
> >    as an ExtINTA interrupt.  This would make the code in check_timer()
> >    decide it has found a working configuration, while actually it has been
> >    fooled.
[...]
> Here you go:
>
> [    0.108006] ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1
> [    0.108006] ..MP-BIOS bug: 8254 timer not connected to IO-APIC
> [    0.108006] ...trying to set up timer (IRQ0) through the 8259A ... <3>
> [    0.108006] ..... (found apic 0 pin 2) ...<3> works.
>
> The full dmesg is at: http://www.sisk.pl/kernel/debug/20080618/dmesg-1.log

Thanks.  In this case I suspect the case #1 quoted above happens, that is
the 8259A manages to deliver its interrupt somehow.  Note at this stage it
is meant to be in the AEOI mode, so it can happily resubmit the interrupt
indefinitely with no additional handling as long as it receives INTA
cycles.

Can you please try the patch below on top of "x86: I/O APIC: timer
through 8259A second-chance" to see whether my hypothesis is true?  It
modifies the through-8259A setup path so that the APIC input gets masked,
but the 8259A has the timer interrupt still enabled.  Let me know how the
timer interrupt is routed in this case.

Bisected-by: "Rafael J. Wysocki" <rjw@sisk.pl>
Tested-by: "Rafael J. Wysocki" <rjw@sisk.pl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08 09:13:24 +02:00
Paolo Ciarrocchi
360624484c x86: coding style fixes to arch/x86/kernel/io_apic_32.c
Before:
total: 91 errors, 73 warnings, 2850 lines checked

After:
total: 1 errors, 47 warnings, 2848 lines checked

Compile tested:

paolo@paolo-desktop:/tmp$ size io*
   text    data     bss     dec     hex filename
  13836    1756   11104   26696    6848 io_apic_32.o.after
  13836    1756   11104   26696    6848 io_apic_32.o.before

Signed-off-by: Paolo Ciarrocchi <paolo.ciarrocchi@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08 09:13:23 +02:00
Cyrill Gorcunov
46b3b4ef1e x86, io-apic: use predefined names instead of numeric constants
This patch replaces some hard-coded numbers with predefined names.

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08 09:13:22 +02:00
Maciej W. Rozycki
d54db1ac9e x86: APIC/SMP: Downgrade the NMI watchdog for "nosmp"
If configured to use the I/O APIC, the NMI watchdog is deemed to fail if
the chip has been deactivated as a result of "nosmp".  Downgrade to the
local APIC watchdog similarly to what is done for the UP case.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08 09:13:19 +02:00
Maciej W. Rozycki
1966202748 x86: APIC/UP: Remove redundant NMI watchdog downgrade
For the UP case the NMI watchdog downgrade is done consistently in
APIC_init_uniprocessor() now.  Remove redundant code used only when
BIOS-disabled local APIC is activated.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08 09:13:18 +02:00
Maciej W. Rozycki
acae7d906f x86: APIC/UP: Downgrade the NMI watchdog for no I/O APIC
If configured to use the I/O APIC, the NMI watchdog is deemed to fail if
the chip will not be used in the UP configuration, because "noapic" has
been specified or the chip is simply not there.  Downgrade to the local
APIC watchdog to rectify.

The new #ifdef is ugly, I know.  A proper solution is to provide suitable
definitions of smp_found_config, etc. for !CONFIG_X86_IO_APIC in a header.
Likewise the whole if () condition should be moved to a static inline
function.  Such clean-ups are beyond the scope of this change and can be
done once the whole issue of the timer has been sorted out.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08 09:13:17 +02:00
Ingo Molnar
6fe9fe8756 Revert "x86: APIC/SMP: downgrade the NMI watchdog for "nosmp""
This reverts commit 791b93d3dfaf16c23e978bec0cc0a3dd9d855d63.

A better fix from Maciej will be merged.
2008-07-08 09:13:15 +02:00
Ingo Molnar
ab5a5be099 Revert "x86, io-apic: fix nmi_watchdog=1 bootup hang"
This reverts commit 2229ff84f01746d02fb6b79e156fb5cce48c908f.

A better fix from Maciej will be merged.
2008-07-08 09:13:14 +02:00
Ingo Molnar
ff11571b25 x86, io-apic: fix nmi_watchdog=1 bootup hang
nmi_watchdog=1 hangs on 64-bit:

[    0.250000] Detected 12.564 MHz APIC timer.
[    0.254178] APIC timer registered as dummy, due to nmi_watchdog=1!
[    0.260366] Testing NMI watchdog ... <4>WARNING: CPU#0: NMI appears to be stuck (0->0)!
[    ...     ]
[    0.470003] calling  genl_init+0x0/0xd0
[  hard hang ]

bisected it down to:

 git-bisect start
 git-bisect good 1beee8dc8c
 git-bisect bad 11582ece0aaa2d0f94f345c08a4ab9997078a083
 git-bisect bad 5479c623bb44089844022c03d4c0eb16d5b7a15f
 git-bisect bad cfb4c7fabeb499e1c29f9d1878968e37a938e28a
 git-bisect good 246dd412d3
 git-bisect bad 3f8237eaff7dc1e35fa791dae095574fd974e671
 git-bisect good 90e23b13ab849e2a11f00c655eb3a2011b4623be
 git-bisect bad 833526a34eeefc117df3191a594c3c3a4f15a9ac
 git-bisect good 791b93d3dfaf16c23e978bec0cc0a3dd9d855d63
 git-bisect bad 65767c64068f2c93e56a1accfed5c78230ac12d7
 git-bisect bad 2abc5c05dd82c188e3bdf6641a274f013348d14b
 git-bisect bad 317e1f2597ffb4d4db940577bbe56dc6e881ef07

| 317e1f2597ffb4d4db940577bbe56dc6e881ef07 is first bad commit
| commit 317e1f2597ffb4d4db940577bbe56dc6e881ef07
| Author: Maciej W. Rozycki <macro@linux-mips.org>
| Date:   Wed May 21 22:10:22 2008 +0100
|     x86: I/O APIC: clean up the 8259A on a NMI watchdog failure

the problem is that in the dummy-lapic branch we rely on the i8259A
but if the NMI watchdog fails we turn off IRQ 0 - which doesnt work
too well ;-)

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08 09:13:13 +02:00
Cyrill Gorcunov
067fa0ff0c x86: IO-APIC - use NMI_NONE instead of numeric constant
Not sure but maybe it is better to use NMI_DISABLED,
will take a look. But for now this patch is not change
anything in logic so it will not hurt/broke the kernel.
For most cases nmi_watchdog assignment is by one of NMI_*
macro so I think there it make sense too.

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08 09:13:12 +02:00
Ingo Molnar
b1b57ee135 x86 build fix:
arch/x86/kernel/io_apic_64.c: In function 'check_timer':
  arch/x86/kernel/io_apic_64.c:1688: error: 'vector' undeclared (first use in this function)
  arch/x86/kernel/io_apic_64.c:1688: error: (Each undeclared identifier is reported only once
  arch/x86/kernel/io_apic_64.c:1688: error: for each function it appears in.)
2008-07-08 09:13:11 +02:00
Thomas Gleixner
431ee79db0 x86: apic_64.c fix sparse warnings about shadowed variables
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08 09:13:10 +02:00
Thomas Gleixner
7223daf5e1 x86: make irq_cfg static
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08 09:13:09 +02:00
Maciej W. Rozycki
691874fa96 x86: I/O APIC: timer through 8259A second-chance
Some systems incorrectly report the ExtINTA pin of the I/O APIC as the
genuine target of the timer interrupt.  Here is a change that copies timer
pin information found to the other pin if one has been found only.  This
way both a direct and a through-8259A route is tested with the pin letting
these problematic systems work well enough.  If no timer pin information
has been found for the I/O APIC, then local APIC variations are tried
only, similarly to what is done without the change (except without the
misleading messages).

Obviously if we try the first-chance path without being told by the BIOS
to do so, we should not complain either, so do not print the message in
this case.

The 64-bit variation should be updated with a call to
replace_pin_at_irq() which can be done with the upcoming merge.  Since
add_pin_to_irq() is now always called in the first-chance path, the
condition to require it in the second-chance path no longer happens.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08 09:13:07 +02:00
Maciej W. Rozycki
03be750559 x86: I/O APIC: keep the timer IRQ masked during set-up
Keep the timer interrupt line masked when reconfiguring its interrupt
redirection entry in the I/O APIC.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08 09:13:06 +02:00
Maciej W. Rozycki
24742ece8e x86: I/O APIC: unmask the second-chance timer interrupt
Unmask the timer interrupt line set up in the through-8259A mode
explicitly after setup_timer_IRQ0_pin() has set up the I/O APIC interrupt
redirection entry to let the two operations be unbound from each other.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08 09:13:05 +02:00
Maciej W. Rozycki
f7633ce55b x86: I/O APIC: rename setup_ExtINT_IRQ0_pin()
Rename setup_ExtINT_IRQ0_pin() to setup_timer_IRQ0_pin() to better
reflect the upcoming role of a function setting up a (semi-)arbitrary I/O
APIC pin appropriately for the 8254 timer.  By "appropriate" the following
settings are meant: edge-triggered, active-high, all the other settings
per-architecture.  Adjust comments to reflect code appropriately.  No
functional changes.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08 09:13:04 +02:00
Maciej W. Rozycki
6b4722a777 x86: I/O APIC: remove redundant LVT0 masking
The LINT0 line of the local APIC is masked in the LVT0 entry in
check_timer() before this function is ever called.  Removed the
redundant unmasking for better control.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08 09:13:03 +02:00
Maciej W. Rozycki
80d16bace6 x86: I/O APIC: remove redundant 8259A {,un}masking
For a better control the masking and unmasking of the timer interrupt
line in the 8259A operating in the 'Virtual Wire' mode has been moved out
of setup_ExtINT_IRQ0_pin() now, so remove the redundant calls from the
function.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08 09:13:02 +02:00
Maciej W. Rozycki
f08252623c x86: I/O APIC: fix the name of the through-8259A handler
When the through-8259A mode is used for the timer, the call to
set_irq_handler() will register a NULL handler name, resulting in
"IO-APIC-<NULL>" reported.  Fix by calling ioapic_register_intr() as done
for all the other I/O APIC interrupts.

The 64-bit variation calls set_irq_chip_and_handler_name() here
needlessly and should get fixed with the upcoming merge.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08 09:13:01 +02:00
Maciej W. Rozycki
9a1c619291 x86: I/O APIC: fix the name of the L-APIC IRQ handler
The local APIC interrupt handler gets registered with
set_irq_chip_and_handler_name(), which results in
"local-APIC-edge-fasteoi" reported as the name of the handler.  Fix by
removing the type of the handler left over from before the generic
handlers were introduced.

The 64-bit variation should get fixed with the upcoming merge.

NB It should really use the "edge" handler and not the "fasteoi" one,
but that's a separate issue.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08 09:13:00 +02:00
Maciej W. Rozycki
35542c5ebc x86: I/O APIC: clean up the 8259A on a NMI watchdog failure
There is no point in keeping the 8259A enabled if the I/O APIC NMI
watchdog has failed and the 8259A is not used to pass through regular
timer interrupts.  This fixes problems with some systems where some logic
gets confused.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08 09:12:59 +02:00
Maciej W. Rozycki
a1133d8e4f x86: APIC/SMP: downgrade the NMI watchdog for "nosmp"
If configured to use the I/O APIC, the NMI watchdog is deemed to fail if
the chip has been deactivated as a result of "nosmp".  Downgrade to the
local APIC watchdog similarly to what is done for the UP case.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08 09:12:58 +02:00
Maciej W. Rozycki
73d08e6360 x86: APIC/SMP: correct the message for "nosmp"
The local APIC is no longer forced off when "nosmp" has been specified.
Correct the message printed.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08 09:12:57 +02:00
Maciej W. Rozycki
60134ebe79 x86: I/O APIC: keep IRQ off when changing LVT registers
Disable the 8259A acting in the "virtual wire" mode to keep the interrupt
line inactive while fiddling with local APIC interrupt vector registers
associated with its destination inputs.  To be on the safe side,
especially concerning flipping the trigger mode.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08 09:12:56 +02:00
Maciej W. Rozycki
e67465f129 x86: I/O APIC: clean up after a fasteoi failure
Disable the 8259A when routing of the timer interrupt through the chip to
the local APIC of the primary processor has failed.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08 09:12:55 +02:00
Maciej W. Rozycki
ecd29476ae x86: I/O APIC: remove parameters to fiddle with the 8259A
Remove the "disable_8254_timer" and "enable_8254_timer" kernel
parameters.  Now that AEOI acknowledgements are no longer needed for
correct timer operation, the 8259A can be kept disabled unconditionally
unless interrupts, either timer or watchdog ones, are actually passed
through it.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08 09:12:54 +02:00
Maciej W. Rozycki
d11d5794e0 x86: I/O APIC: AEOI timer acknowledgement clean-ups
The code that used to be in do_slow_gettimeoffset() that relied on the
IRR bit of the master 8259A PIC for IRQ0 to check the state of the output
timer 0 of the PIT is no longer there.  As a result, there is no need to
use the POLL command to acknowledge the timer interrupt in the "8259A
Virtual Wire", except for the NMI watchdog when the i82489DX APIC is used
(this is because this particular APIC treats NMIs as level-triggered and
keeping the input asserted would keep motherboard NMI sources held off for
too long).  Remove the unneeded bits and adjust comments accordingly.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08 09:12:53 +02:00
Ingo Molnar
a0176e2485 Revert "Revert "x86: fix ioapic bug again""
This reverts commit 0b6a39f7eb.

The changes in tip/x86/apic solve this better.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08 09:12:49 +02:00
Ingo Molnar
93022136ff Merge commit 'v2.6.26-rc9' into x86/cpu 2008-07-08 07:47:47 +02:00
Yinghai Lu
c49c412a47 x86: make 64bit identify_cpu use cpu_dev v2
v2: fix early_panic on this config:

  http://redhat.com/~mingo/misc/config-Thu_Jun_19_14_22_37_CEST_2008.bad

reason : struct cpu_vendor_dev size is 16, need to make table to be 16
         byte alignment

also print out the cpu supported...

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: Dave Jones <davej@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08 07:47:40 +02:00
Yinghai Lu
dcd32b6a1f x86: make 64-bit identify_cpu use cpu_dev
we may need to move some functions to common.c later

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08 07:47:39 +02:00
Robert Richter
3a27dd1ce5 x86: Move PCI IO ECS code to x86/pci
"Form follows function". Code is now where it belongs to.

Signed-off-by: Robert Richter <robert.richter@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08 07:47:39 +02:00
Thomas Gleixner
0beefa208b x86: add C1E aware idle function, fix
On Tue, 17 Jun 2008, Rafael J. Wysocki wrote:
>
> BTW, with the C1E patches reverted I don't get the
> WARNING: at /home/rafael/src/linux-next/kernel/smp.c:215 smp_call_function_single+0x3d/0xa2
> in the log.  Thomas?

The BROADCAST_FORCE notification uses smp_function_call and therefor
must be run with interrupts enabled.

While at it, add a comment for the BROADCAST_EXIT notifier as well.

Reported-and-bisected-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08 07:47:37 +02:00
Thomas Gleixner
aa276e1caf x86, clockevents: add C1E aware idle function
C1E on AMD machines is like C3 but without control from the OS. Up to
now we disabled the local apic timer for those machines as it stops
when the CPU goes into C1E. This excludes those machines from high
resolution timers / dynamic ticks, which hurts especially X2 based
laptops.

The current boot time C1E detection has another, more serious flaw
as well: some BIOSes do not enable C1E until the ACPI processor module
is loaded. This causes systems to stop working after that point.

To work nicely with C1E enabled machines we use a separate idle
function, which checks on idle entry whether C1E was enabled in the
Interrupt Pending Message MSR. This allows us to do timer broadcasting
for C1E and covers the late enablement of C1E as well.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08 07:47:18 +02:00
Ingo Molnar
a1716d508a Merge branch 'x86/s2ram-fix' into x86/urgent 2008-07-05 08:42:45 +02:00
Rafael J. Wysocki
64e83b5a91 x86 ACPI: fix resume from suspend to RAM on uniprocessor x86-64
Since the trampoline code is now used for ACPI resume from suspend to RAM,
the trampoline page tables have to be fixed up during boot not only on SMP
systems, but also on UP systems that use the trampoline.

Reference: http://bugzilla.kernel.org/show_bug.cgi?id=10923

Reported-by: Dionisus Torimens <djtm@gmx.net>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: pm list <linux-pm@lists.linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-05 08:42:28 +02:00
H. Peter Anvin
4b4f7280d7 x86 ACPI: normalize segment descriptor register on resume
Some Dell laptops enter resume with apparent garbage in the segment
descriptor registers (almost certainly the result of a botched
transition from protected to real mode.)  The only way to clean that
up is to enter protected mode ourselves and clean out the descriptor
registers.

This fixes resume on Dell XPS M1210 and Dell D620.

Reference: http://bugzilla.kernel.org/show_bug.cgi?id=10927

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: pm list <linux-pm@lists.linux-foundation.org>
Cc: Len Brown <lenb@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Tested-by: Kirill A. Shutemov <kirill@shutemov.name>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-05 08:25:40 +02:00
Linus Torvalds
b8a0b6ccf2 Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  xen: fix address truncation in pte mfn<->pfn conversion
  arch/x86/mm/init_64.c: early_memtest(): fix types
  x86: fix Intel Mac booting with EFI
2008-07-04 10:46:46 -07:00
Joerg Roedel
fb339690a0 x86, AMD IOMMU: remove unnecessary code from the iommu_enable function
This code removes a leftover from the iommu_enable function. The ctrl variable
is assigned but never used.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Cc: iommu@lists.linux-foundation.org
Cc: bhavna.sarathy@amd.com
Cc: robert.richter@amd.com
Cc: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-04 11:44:44 +02:00
Joerg Roedel
c1cbebeec4 x86, AMD IOMMU: don't try to init IOMMU if early detect code did not detect one
This patch adds a check if the early detect code has found AMD IOMMU hardware
descriptions and does not try to initialize hardware if the check failed.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Cc: iommu@lists.linux-foundation.org
Cc: bhavna.sarathy@amd.com
Cc: robert.richter@amd.com
Cc: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-04 11:44:43 +02:00
Joerg Roedel
8b14518fad x86, AMD IOMMU: honor iommu=off instead of amd_iommu=off
This patch removes the amd_iommu=off kernel parameter and honors the generic
iommu=off parameter for the same purpose.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Cc: iommu@lists.linux-foundation.org
Cc: bhavna.sarathy@amd.com
Cc: robert.richter@amd.com
Cc: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-04 11:44:41 +02:00
Joerg Roedel
999ba417cc x86, AMD IOMMU: flush domain TLB when there is more than one page to flush
This patch changes the domain TLB flushing behavior of the driver. When there
is more than one page to flush it flushes the whole domain TLB instead of every
single page. So we send only a single command to the IOMMU in every case which
is faster to execute.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Cc: iommu@lists.linux-foundation.org
Cc: bhavna.sarathy@amd.com
Cc: robert.richter@amd.com
Cc: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-04 11:44:40 +02:00
Joerg Roedel
5f6a59d8ad x86, AMD IOMMU: remove unnecessary set_bit_string
The set_bit_string call in the address allocator is not necessary because its
already called in iommu_area_alloc().

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Cc: iommu@lists.linux-foundation.org
Cc: bhavna.sarathy@amd.com
Cc: robert.richter@amd.com
Cc: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-04 11:44:39 +02:00
Venki Pallipadi
2d144e6309 x86, mce_64.c: mce_cpu_quirks being ignored
Quirks getting ignored was a bug. Below patch fixes the bug, until
we have the dynamic banks support.

Sysfs choice configuration should not have any issues with the earlier patch
as we look for NR_SYSFS_BANKS in do_machine_check().

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Max Asbock <masbock@us.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-03 15:05:21 +02:00
Ingo Molnar
a8cac81776 Merge commit 'v2.6.26-rc8' into x86/mce 2008-07-03 15:03:02 +02:00
Ben Castricum
bc4e0f9ae2 x86: microcode: cosmetic changes
First announce ourself, then start working. Currently this module reports
itself when all is completed which is not most modules do. Plus some
cosmetic/whitespace cleanups.

Signed-off-by: Ben Castricum <lk0806@bencastricum.nl>
Cc: trivial@kernel.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-03 11:37:20 +02:00
Hugh Dickins
216705d272 x86: fix Intel Mac booting with EFI
Fedora reports that mem_init()'s zap_low_mappings(), extended to SMP in
61165d7a03 x86: fix app crashes after SMP
resume causes 32-bit Intel Mac machines to reboot very early when
booting with EFI.

The EFI code appears to manage low mappings for itself when needed; but
like many before it, confuses PSE with PAE.  So it has only been mapping
half the space it needed when PSE but not PAE.  This remained unnoticed
until we moved the SMP zap_low_mappings() before
efi_enter_virtual_mode().  Presumably could have been noticed years ago
if anyone ran a UP kernel on such machines?

Reported-by: Peter Jones <pjones@redhat.com>
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Cc: Peter Jones <pjones@redhat.com>
Cc: Glauber Costa <gcosta@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Tested-by: Peter Jones <pjones@redhat.com>
2008-07-03 08:19:18 +02:00
Roland McGrath
45fdc3a762 x86 ptrace: fix PTRACE_GETFPXREGS error
ptrace has always returned only -EIO for all failures to access
registers.  The user_regset calls are allowed to return a more
meaningful variety of errors.  The REGSET_XFP calls use -ENODEV
for !cpu_has_fxsr hardware.  Make ptrace return the traditional
-EIO instead of the error code from the user_regset call.

Signed-off-by: Roland McGrath <roland@redhat.com>
Cc: stable@kernel.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-01 11:03:31 +02:00
Joerg Roedel
7441e9cb18 x86, AMD IOMMU: disable suspend/resume with IOMMU enabled (for now)
This patch disables suspend/resume on machines with AMD IOMMU enabled. Real
suspend/resume support for AMD IOMMU is currently being worked on. Until this
is ready it will be disabled to avoid data corruption when the IOMMU is not
properly re-enabled at resume. The patch is based on a similar patch for the
GART driver written by Pavel Machek.

The overall driver merged into tip/master is tested with parallel disk and
network loads and showed no problems in a test running for 3 days.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Cc: iommu@lists.linux-foundation.org
Cc: bhavna.sarathy@amd.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-30 20:35:15 +02:00
Linus Torvalds
bbad5d4750 Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  ptrace GET/SET FPXREGS broken
  x86: fix cpu hotplug crash
  x86: section/warning fixes
  x86: shift bits the right way in native_read_tscp
2008-06-30 08:56:57 -07:00
TAKADA Yoshihito
11dbc963a8 ptrace GET/SET FPXREGS broken
When I update kernel 2.6.25 from 2.6.24, gdb does not work.
On 2.6.25, ptrace(PTRACE_GETFPXREGS, ...) returns ENODEV.

But 2.6.24 kernel's ptrace() returns EIO.
It is issue of compatibility.

I attached test program as pt.c and patch for fix it.

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include <errno.h>
#include <sys/ptrace.h>
#include <sys/types.h>

struct user_fxsr_struct {
	unsigned short	cwd;
	unsigned short	swd;
	unsigned short	twd;
	unsigned short	fop;
	long	fip;
	long	fcs;
	long	foo;
	long	fos;
	long	mxcsr;
	long	reserved;
	long	st_space[32];	/* 8*16 bytes for each FP-reg = 128 bytes */
	long	xmm_space[32];	/* 8*16 bytes for each XMM-reg = 128 bytes */
	long	padding[56];
};

int main(void)
{
  pid_t pid;

  pid = fork();

  switch(pid){
  case -1:/*  error */
    break;
  case 0:/*  child */
    child();
    break;
  default:
    parent(pid);
    break;
  }
  return 0;
}

int child(void)
{
  ptrace(PTRACE_TRACEME);
  kill(getpid(), SIGSTOP);
  sleep(10);
  return 0;
}
int parent(pid_t pid)
{
  int ret;
  struct user_fxsr_struct fpxregs;

  ret = ptrace(PTRACE_GETFPXREGS, pid, 0, &fpxregs);
  if(ret < 0){
    printf("%d: %s.\n", errno, strerror(errno));
  }
  kill(pid, SIGCONT);
  wait(pid);
  return 0;
}

/* in the kerel, at kernel/i387.c get_fpxregs() */

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-30 14:35:18 +02:00
Zhang, Yanmin
fcb43042ef x86: fix cpu hotplug crash
Vegard Nossum reported crashes during cpu hotplug tests:

  http://marc.info/?l=linux-kernel&m=121413950227884&w=4

In function _cpu_up, the panic happens when calling
__raw_notifier_call_chain at the second time. Kernel doesn't panic when
calling it at the first time. If just say because of nr_cpu_ids, that's
not right.

By checking the source code, I found that function do_boot_cpu is the culprit.
Consider below call chain:
 _cpu_up=>__cpu_up=>smp_ops.cpu_up=>native_cpu_up=>do_boot_cpu.

So do_boot_cpu is called in the end. In do_boot_cpu, if
boot_error==true, cpu_clear(cpu, cpu_possible_map) is executed. So later
on, when _cpu_up calls __raw_notifier_call_chain at the second time to
report CPU_UP_CANCELED, because this cpu is already cleared from
cpu_possible_map, get_cpu_sysdev returns NULL.

Many resources are related to cpu_possible_map, so it's better not to
change it.

Below patch against 2.6.26-rc7 fixes it by removing the bit clearing in
cpu_possible_map.

Signed-off-by: Zhang Yanmin <yanmin_zhang@linux.intel.com>
Tested-by: Vegard Nossum <vegard.nossum@gmail.com>
Acked-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-30 13:15:43 +02:00
FUJITA Tomonori
44974c8fc1 x86 gart: remove unnecessary set_bit_string
iommu_area_alloc internally calls set_bit_string and set bits
properly. This set_bit_string is unnecessary.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: joerg.roedel@amd.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-30 10:52:40 +02:00
Vegard Nossum
9d8ad5d6c7 x86: don't destroy %rbp on kernel-mode faults
From the code:

    "B stepping K8s sometimes report an truncated RIP for IRET exceptions
    returning to compat mode. Check for these here too."

The code then proceeds to truncate the upper 32 bits of %rbp. This means
that when do_page_fault() is finally called, its prologue,

    do_page_fault:
        push %rbp
        movl %rsp, %rbp

will put the truncated base pointer on the stack. This means that the
stack tracer will not be able to follow the base-pointer changes and
will see all subsequent stack frames as unreliable.

This patch changes the code to use a different register (%rcx) for the
checking and leaves %rbp untouched.

Signed-off-by: Vegard Nossum <vegard.nossum@gmail.com>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
Acked-by: Arjan van de Ven <arjan@linux.intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-27 17:45:59 +02:00
Ingo Molnar
92af4e2902 x86, AMD IOMMU, build fix #2
fix:

 arch/x86/kernel/amd_iommu.c: In function ‘amd_iommu_init_dma_ops':
 arch/x86/kernel/amd_iommu.c:940: error: lvalue required as left operand of assignment
 arch/x86/kernel/amd_iommu.c:941: error: lvalue required as left operand of assignment

due to !CONFIG_GART_IOMMU.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-27 10:52:34 +02:00
Joerg Roedel
a69ca34018 AMD_IOMMU: call detect and initialization functions from dma code
This patch adds the function calls to initialize the AMD IOMMU hardware and
dma_ops to the generic DMA code for the x86 architecture.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Cc: iommu@lists.linux-foundation.org
Cc: bhavna.sarathy@amd.com
Cc: Sebastian.Biemueller@amd.com
Cc: robert.richter@amd.com
Cc: joro@8bytes.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-27 10:12:22 +02:00
Joerg Roedel
8736197ba8 x86, AMD IOMMU: initialize dma_ops from IOMMU initialization and enable IOMMUs
This patch adds a call to the driver specific dma_ops initialization routine
from the AMD IOMMU hardware initialization. Further it adds the necessary code
to finally enable AMD IOMMU hardware.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Cc: iommu@lists.linux-foundation.org
Cc: bhavna.sarathy@amd.com
Cc: Sebastian.Biemueller@amd.com
Cc: robert.richter@amd.com
Cc: joro@8bytes.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-27 10:12:21 +02:00
Joerg Roedel
c6da992e16 x86, AMD IOMMU: add amd_iommu.h to export functions to the generic x86 dma code
This patch adds the amd_iommu.h file which will be included in the generic
code.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Cc: iommu@lists.linux-foundation.org
Cc: bhavna.sarathy@amd.com
Cc: Sebastian.Biemueller@amd.com
Cc: robert.richter@amd.com
Cc: joro@8bytes.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-27 10:12:21 +02:00
Joerg Roedel
6631ee9d00 x86, AMD IOMMU: add dma_ops initialization function
This patch adds the function to initialize the dma_ops for the AMD IOMMU.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Cc: iommu@lists.linux-foundation.org
Cc: bhavna.sarathy@amd.com
Cc: Sebastian.Biemueller@amd.com
Cc: robert.richter@amd.com
Cc: joro@8bytes.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-27 10:12:20 +02:00
Joerg Roedel
c432f3df8e x86, AMD IOMMU: add pre-allocation of protection domains
This patch adds a function to pre-allocate protection domains. So we don't have
to allocate it on the first request for a device (which can happen in atomic
mode).

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Cc: iommu@lists.linux-foundation.org
Cc: bhavna.sarathy@amd.com
Cc: Sebastian.Biemueller@amd.com
Cc: robert.richter@amd.com
Cc: joro@8bytes.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-27 10:12:20 +02:00
Joerg Roedel
5d8b53cf3f x86, AMD IOMMU: add mapping functions for coherent mappings
This patch adds the dma_ops functions for coherent mappings.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Cc: iommu@lists.linux-foundation.org
Cc: bhavna.sarathy@amd.com
Cc: Sebastian.Biemueller@amd.com
Cc: robert.richter@amd.com
Cc: joro@8bytes.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-27 10:12:19 +02:00
Joerg Roedel
65b050adbf x86, AMD IOMMU: add mapping functions for scatter gather lists
This patch adds the dma_ops functions for mapping and unmapping scatter gather
lists.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Cc: iommu@lists.linux-foundation.org
Cc: bhavna.sarathy@amd.com
Cc: Sebastian.Biemueller@amd.com
Cc: robert.richter@amd.com
Cc: joro@8bytes.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-27 10:12:19 +02:00
Joerg Roedel
4da70b9e4f x86, AMD IOMMU: add dma_ops mapping functions for single mappings
This patch adds the dma_ops specific mapping functions for single mappings.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Cc: iommu@lists.linux-foundation.org
Cc: bhavna.sarathy@amd.com
Cc: Sebastian.Biemueller@amd.com
Cc: robert.richter@amd.com
Cc: joro@8bytes.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-27 10:12:18 +02:00
Joerg Roedel
cb76c32297 x86, AMD IOMMU: add generic dma_ops mapping functions
This patch adds the generic functions to map and unmap pages to a protection
domain for dma_ops usage.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Cc: iommu@lists.linux-foundation.org
Cc: bhavna.sarathy@amd.com
Cc: Sebastian.Biemueller@amd.com
Cc: robert.richter@amd.com
Cc: joro@8bytes.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-27 10:12:18 +02:00
Joerg Roedel
b20ac0d4d6 x86, AMD IOMMU: add functions to find IOMMU device resources
This patch adds functions necessary to find the IOMMU resources for a specific
device.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Cc: iommu@lists.linux-foundation.org
Cc: bhavna.sarathy@amd.com
Cc: Sebastian.Biemueller@amd.com
Cc: robert.richter@amd.com
Cc: joro@8bytes.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-27 10:12:17 +02:00
Joerg Roedel
ec487d1a11 x86, AMD IOMMU: add domain allocation and deallocation functions
This patch adds the functions to allocate and free protection domains for the
IOMMU.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Cc: iommu@lists.linux-foundation.org
Cc: bhavna.sarathy@amd.com
Cc: Sebastian.Biemueller@amd.com
Cc: robert.richter@amd.com
Cc: joro@8bytes.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-27 10:12:17 +02:00
Joerg Roedel
d3086444b2 x86, AMD IOMMU: add address allocation and deallocation functions
This patch adds the address allocator to the AMD IOMMU code.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Cc: iommu@lists.linux-foundation.org
Cc: bhavna.sarathy@amd.com
Cc: Sebastian.Biemueller@amd.com
Cc: robert.richter@amd.com
Cc: joro@8bytes.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-27 10:12:16 +02:00
Joerg Roedel
bd0e521158 x86, AMD IOMMU: add functions to initialize unity mappings
This patch adds the functions which will initialize the unity mappings in the
device page tables.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Cc: iommu@lists.linux-foundation.org
Cc: bhavna.sarathy@amd.com
Cc: Sebastian.Biemueller@amd.com
Cc: robert.richter@amd.com
Cc: joro@8bytes.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-27 10:12:16 +02:00
Joerg Roedel
a19ae1eccf x86, AMD IOMMU: add functions to send IOMMU commands
This patch adds generic handling function as well as all functions to send
specific commands to the IOMMU hardware as required by this driver.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Cc: iommu@lists.linux-foundation.org
Cc: bhavna.sarathy@amd.com
Cc: Sebastian.Biemueller@amd.com
Cc: robert.richter@amd.com
Cc: joro@8bytes.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-27 10:12:15 +02:00
Joerg Roedel
000fca2dfc x86, AMD IOMMU: add amd_iommu.c to Makefile
This patch adds the new amd_iommu.c file to the architecture kernel Makefile
for x86.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Cc: iommu@lists.linux-foundation.org
Cc: bhavna.sarathy@amd.com
Cc: Sebastian.Biemueller@amd.com
Cc: robert.richter@amd.com
Cc: joro@8bytes.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-27 10:12:15 +02:00
Joerg Roedel
b6c02715cf x86, AMD IOMMU: add generic defines and structures for mapping code
This patch adds generic stuff used by the mapping and unmapping code for the
AMD IOMMU.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Cc: iommu@lists.linux-foundation.org
Cc: bhavna.sarathy@amd.com
Cc: Sebastian.Biemueller@amd.com
Cc: robert.richter@amd.com
Cc: joro@8bytes.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-27 10:12:14 +02:00
Joerg Roedel
918ad6c54d x86, AMD IOMMU: add kernel command line parameters for AMD IOMMU
This patch adds two parameters to the kernel command line to control behavior
of the AMD IOMMU.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Cc: iommu@lists.linux-foundation.org
Cc: bhavna.sarathy@amd.com
Cc: Sebastian.Biemueller@amd.com
Cc: robert.richter@amd.com
Cc: joro@8bytes.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-27 10:12:14 +02:00
Joerg Roedel
ae7877de9c x86, AMD IOMMU: add early detection code
This patch adds code to detect an AMD IOMMU early during boot before the early
detection code of other IOMMUs run.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Cc: iommu@lists.linux-foundation.org
Cc: bhavna.sarathy@amd.com
Cc: Sebastian.Biemueller@amd.com
Cc: robert.richter@amd.com
Cc: joro@8bytes.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-27 10:12:13 +02:00
Joerg Roedel
fe74c9cf39 x86, AMD IOMMU: clue initialization code together
This patch puts the AMD IOMMU ACPI table parsing and hardware initialization
functions together to the main intialization routine.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Cc: iommu@lists.linux-foundation.org
Cc: bhavna.sarathy@amd.com
Cc: Sebastian.Biemueller@amd.com
Cc: robert.richter@amd.com
Cc: joro@8bytes.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-27 10:12:13 +02:00
Joerg Roedel
be2a022c0d x86, AMD IOMMU: add functions to parse IOMMU memory mapping requirements for devices
This patch adds the functions to parse the information about IOMMU exclusion
ranges and required unity mappings for the devices handled by the IOMMU.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Cc: iommu@lists.linux-foundation.org
Cc: bhavna.sarathy@amd.com
Cc: Sebastian.Biemueller@amd.com
Cc: robert.richter@amd.com
Cc: joro@8bytes.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-27 10:12:12 +02:00
Joerg Roedel
e47d402d2d x86, AMD IOMMU: add detect code for AMD IOMMU hardware
This patch adds the detection of AMD IOMMU hardware provided on information
from ACPI provided by the BIOS.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Cc: iommu@lists.linux-foundation.org
Cc: bhavna.sarathy@amd.com
Cc: Sebastian.Biemueller@amd.com
Cc: robert.richter@amd.com
Cc: joro@8bytes.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-27 10:12:12 +02:00
Joerg Roedel
5d0c8e49f8 x86, AMD IOMMU: add functions for IOMMU hardware initialization from ACPI
This patch adds functions to initialize the IOMMU hardware with information
from ACPI and PCI.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Cc: iommu@lists.linux-foundation.org
Cc: bhavna.sarathy@amd.com
Cc: Sebastian.Biemueller@amd.com
Cc: robert.richter@amd.com
Cc: joro@8bytes.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-27 10:12:11 +02:00
Joerg Roedel
3566b7786a x86, AMD IOMMU: add device table initialization functions
This patch adds functions necessary to initialize the device table from the
ACPI definitions.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Cc: iommu@lists.linux-foundation.org
Cc: bhavna.sarathy@amd.com
Cc: Sebastian.Biemueller@amd.com
Cc: robert.richter@amd.com
Cc: joro@8bytes.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-27 10:12:11 +02:00
Joerg Roedel
b36ca91e1d x86, AMD IOMMU: add command buffer (de-)allocation
This patch adds the functions to allocate and deallocate the command buffer for
one IOMMU in the system.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Cc: iommu@lists.linux-foundation.org
Cc: bhavna.sarathy@amd.com
Cc: Sebastian.Biemueller@amd.com
Cc: robert.richter@amd.com
Cc: joro@8bytes.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-27 10:12:10 +02:00
Joerg Roedel
b2026aa2dc x86, AMD IOMMU: add functions for programming IOMMU MMIO space
This patch adds the functions required to programm the IOMMU with the MMIO
space.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Cc: iommu@lists.linux-foundation.org
Cc: bhavna.sarathy@amd.com
Cc: Sebastian.Biemueller@amd.com
Cc: robert.richter@amd.com
Cc: joro@8bytes.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-27 10:12:10 +02:00
Joerg Roedel
6c56747b46 x86, AMD IOMMU: add functions for mapping/unmapping the MMIO space
This patch contains two functions to map and unmap the MMIO region of an IOMMU.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Cc: iommu@lists.linux-foundation.org
Cc: bhavna.sarathy@amd.com
Cc: Sebastian.Biemueller@amd.com
Cc: robert.richter@amd.com
Cc: joro@8bytes.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-27 10:12:09 +02:00
Joerg Roedel
ca7ed057ae x86, AMD IOMMU: add amd_iommu_init.c to Makefile
This patch adds the source file amd_iommu_init.c to the kernel Makefile for the
x86 architecture.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Cc: iommu@lists.linux-foundation.org
Cc: bhavna.sarathy@amd.com
Cc: Sebastian.Biemueller@amd.com
Cc: robert.richter@amd.com
Cc: joro@8bytes.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-27 10:12:09 +02:00
Joerg Roedel
3e8064ba59 x86, AMD IOMMU: add functions to find last possible PCI device for IOMMU
This patch adds functions to find the last PCI bus/device/function the IOMMU
driver has to handle. This information is used later to allocate the memory for
the data structures.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Cc: iommu@lists.linux-foundation.org
Cc: bhavna.sarathy@amd.com
Cc: Sebastian.Biemueller@amd.com
Cc: robert.richter@amd.com
Cc: joro@8bytes.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-27 10:12:08 +02:00
Joerg Roedel
928abd2545 x86, AMD IOMMU: add data structures to manage the IOMMUs in the system
This patch adds the data structures which will contain the information read
from the ACPI table.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Cc: iommu@lists.linux-foundation.org
Cc: bhavna.sarathy@amd.com
Cc: Sebastian.Biemueller@amd.com
Cc: robert.richter@amd.com
Cc: joro@8bytes.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-27 10:12:08 +02:00
Joerg Roedel
f6e2e6b6fc x86, AMD IOMMU: add defines and structures for ACPI scanning code
This patch adds the required data structures and constants required to parse
the ACPI table for the AMD IOMMU.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Cc: iommu@lists.linux-foundation.org
Cc: bhavna.sarathy@amd.com
Cc: Sebastian.Biemueller@amd.com
Cc: robert.richter@amd.com
Cc: joro@8bytes.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-27 10:12:07 +02:00
Pavel Machek
fa3d319ac6 pci-gart_64.c: could we get better explanation?
Add better explanation to pci-gart.

Signed-off-by: Pavel Machek <pavel@suse.cz>
Cc: Dave Jones <davej@codemonkey.org.uk>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Trivial patch monkey <trivial@kernel.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-26 15:17:18 +02:00
Jeremy Fitzhardinge
08b882c627 paravirt: add hooks for ptep_modify_prot_start/commit
This patch adds paravirt-ops hooks in pv_mmu_ops for ptep_modify_prot_start and
ptep_modify_prot_commit.  This allows the hypervisor-specific backends to
implement these in some more efficient way.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Acked-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-25 15:16:00 +02:00