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23510 commits

Author SHA1 Message Date
Ingo Molnar
ae94b8075a Merge branch 'linus' into x86/core
Conflicts:

	arch/x86/mm/ioremap.c

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-12 07:29:02 +02:00
Roland McGrath
eca91e7838 x86_64: fix delayed signals
On three of the several paths in entry_64.S that call
do_notify_resume() on the way back to user mode, we fail to properly
check again for newly-arrived work that requires another call to
do_notify_resume() before going to user mode.  These paths set the
mask to check only _TIF_NEED_RESCHED, but this is wrong.  The other
paths that lead to do_notify_resume() do this correctly already, and
entry_32.S does it correctly in all cases.

All paths back to user mode have to check all the _TIF_WORK_MASK
flags at the last possible stage, with interrupts disabled.
Otherwise, we miss any flags (TIF_SIGPENDING for example) that were
set any time after we entered do_notify_resume().  More work flags
can be set (or left set) synchronously inside do_notify_resume(), as
TIF_SIGPENDING can be, or asynchronously by interrupts or other CPUs
(which then send an asynchronous interrupt).

There are many different scenarios that could hit this bug, most of
them races.  The simplest one to demonstrate does not require any
race: when one signal has done handler setup at the check before
returning from a syscall, and there is another signal pending that
should be handled.  The second signal's handler should interrupt the
first signal handler before it actually starts (so the interrupted PC
is still at the handler's entry point).  Instead, it runs away until
the next kernel entry (next syscall, tick, etc).

This test behaves correctly on 32-bit kernels, and fails on 64-bit
(either 32-bit or 64-bit test binary).  With this fix, it works.

    #define _GNU_SOURCE
    #include <stdio.h>
    #include <signal.h>
    #include <string.h>
    #include <sys/ucontext.h>

    #ifndef REG_RIP
    #define REG_RIP REG_EIP
    #endif

    static sig_atomic_t hit1, hit2;

    static void
    handler (int sig, siginfo_t *info, void *ctx)
    {
      ucontext_t *uc = ctx;

      if ((void *) uc->uc_mcontext.gregs[REG_RIP] == &handler)
        {
          if (sig == SIGUSR1)
            hit1 = 1;
          else
            hit2 = 1;
        }

      printf ("%s at %#lx\n", strsignal (sig),
              uc->uc_mcontext.gregs[REG_RIP]);
    }

    int
    main (void)
    {
      struct sigaction sa;
      sigset_t set;

      sigemptyset (&sa.sa_mask);
      sa.sa_flags = SA_SIGINFO;
      sa.sa_sigaction = &handler;

      if (sigaction (SIGUSR1, &sa, NULL)
          || sigaction (SIGUSR2, &sa, NULL))
        return 2;

      sigemptyset (&set);
      sigaddset (&set, SIGUSR1);
      sigaddset (&set, SIGUSR2);
      if (sigprocmask (SIG_BLOCK, &set, NULL))
        return 3;

      printf ("main at %p, handler at %p\n", &main, &handler);

      raise (SIGUSR1);
      raise (SIGUSR2);

      if (sigprocmask (SIG_UNBLOCK, &set, NULL))
        return 4;

      if (hit1 + hit2 == 1)
        {
          puts ("PASS");
          return 0;
        }

      puts ("FAIL");
      return 1;
    }

Signed-off-by: Roland McGrath <roland@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-12 07:11:10 +02:00
Rafael J. Wysocki
da1f29f5df x86: remove conflicting nx6325 and nx6125 quirks
We have two conflicting DMA-based quirks in there for the same set of
boxes (HP nx6325 and nx6125) and one of them actually breaks my box.

So remove the extra code.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: =?iso-8859-1?q?T=F6r=F6k_Edwin?= <edwintorok@gmail.com>
Cc: Vegard Nossum <vegard.nossum@gmail.com>
Cc: Andreas Herrmann <andreas.herrmann3@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-12 06:44:58 +02:00
Ingo Molnar
6c82a000a2 Merge branch 'x86/generalize-visws' into x86/core 2008-07-11 21:22:18 +02:00
Maciej W. Rozycki
5b4d2386c2 x86: Recover timer_ack lost in the merge of the NMI watchdog
In the course of the recent unification of the NMI watchdog an assignment
to timer_ack to switch off unnecesary POLL commands to the 8259A in the
case of a watchdog failure has been accidentally removed.  The statement
used to be limited to the 32-bit variation as since the rewrite of the
timer code it has been relevant for the 82489DX only.  This change brings
it back.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-11 20:54:03 +02:00
Maciej W. Rozycki
af174783b9 x86: I/O APIC: Never configure IRQ2
There is no such entity as ISA IRQ2.  The ACPI spec does not make it
explicitly clear, but does not preclude it either -- all it says is ISA
legacy interrupts are identity mapped by default (subject to overrides),
but it does not state whether IRQ2 exists or not.  As a result if there is
no IRQ0 override, then IRQ2 is normally initialised as an ISA interrupt,
which implies an edge-triggered line, which is unmasked by default as this
is what we do for edge-triggered I/O APIC interrupts so as not to miss an
edge.

To the best of my knowledge it is useless, as IRQ2 has not been in use
since the PC/AT as back then it was taken by the 8259A cascade interrupt
to the slave, with the line position in the slot rerouted to newly-created
IRQ9.  No device could thus make use of this line with the pair of 8259A
chips.  Now in theory INTIN2 of the I/O APIC may be usable, but the
interrupt of the device wired to it would not be available in the PIC mode
at all, so I seriously doubt if anybody decided to reuse it for a regular
device.

However there are two common uses of INTIN2.  One is for IRQ0, with an
ACPI interrupt override (or its equivalent in the MP table).  But in this
case IRQ2 is gone entirely with INTIN0 left vacant.  The other one is for
an 8959A ExtINTA cascade.  In this case IRQ0 goes to INTIN0 and if ACPI is
used INTIN2 is assumed to be IRQ2 (there is no override and ACPI has no
way to report ExtINTA interrupts).  This is where a problem happens.

The problem is INTIN2 is configured as a native APIC interrupt, with a
vector assigned and the mask cleared.  And the line may indeed get active
and inject interrupts if the master 8959A has its timer interrupt enabled
(it might happen for other interrupts too, but they are normally masked in
the process of rerouting them to the I/O APIC).  There are two cases where
it will happen:

* When the I/O APIC NMI watchdog is enabled.  This is actually a misnomer
  as the watchdog pulses are delivered through the 8259A to the LINT0
  inputs of all the local APICs in the system.  The implication is the
  output of the master 8259A goes high and low repeatedly, signalling
  interrupts to INTIN2 which is enabled too!

  [The origin of the name is I think for a brief period during the
  development we had a capability in our code to configure the watchdog to
  use an I/O APIC input; that would be INTIN2 in this scenario.]

* When the native route of IRQ0 via INTIN0 fails for whatever reason -- as
  it happens with the system considered here.  In this scenario the timer
  pulse is delivered through the 8259A to LINT0 input of the local APIC of
  the bootstrap processor, quite similarly to how is done for the watchdog
  described above.  The result is, again, INTIN2 receives these pulses
  too.  Rafael's system used to escape this scenario, because an incorrect
  IRQ0 override would occupy INTIN2 and prevent it from being unmasked.

My conclusion is IRQ2 should be excluded from configuration in all the
cases and the current exception for ACPI systems should be lifted.  The
reason being the exception not only being useless, but harmful as well.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: Matthew Garrett <mjg59@srcf.ucam.org>
Cc: Andreas Herrmann <andreas.herrmann3@amd.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-11 20:54:03 +02:00
Maciej W. Rozycki
c88ac1df48 x86: L-APIC: Always fully configure IRQ0
Unlike the 32-bit one, the 64-bit variation of the LVT0 setup code for
the "8259A Virtual Wire" through the local APIC timer configuration does
not fully configure the relevant irq_chip structure.  Instead it relies on
the preceding I/O APIC code to have set it up, which does not happen if
the I/O APIC variants have not been tried.

The patch includes corresponding changes to the 32-bit variation too
which make them both the same, barring a small syntactic difference
involving sequence of functions in the source.  That should work as an aid
with the upcoming merge.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: Matthew Garrett <mjg59@srcf.ucam.org>
Cc: Andreas Herrmann <andreas.herrmann3@amd.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-11 20:54:02 +02:00
Maciej W. Rozycki
1baea6e2fe x86: L-APIC: Set IRQ0 as edge-triggered
IRQ0 is edge-triggered, but the "8259A Virtual Wire" through the local
APIC configuration in the 32-bit version uses the "fasteoi" handler
suitable for level-triggered APIC interrupt.  Rewrite code so that the
"edge" handler is used.  The 64-bit version uses different code and is
unaffected.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: Matthew Garrett <mjg59@srcf.ucam.org>
Cc: Andreas Herrmann <andreas.herrmann3@amd.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-11 20:54:02 +02:00
Glauber Costa
557d7d4e29 x86: use matching CFI_ENDPROC
The RING0_INT_FRAME macro defines a CFI_STARTPROC.
So we should really be using CFI_ENDPROC after it.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-11 20:49:28 +02:00
Jeremy Fitzhardinge
b6ad92d4fa x86_64: vdso32 cleanup using feature flags
Use the X86_FEATURE_SYSENTER32 to remove hard-coded CPU vendor check.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-11 15:44:58 +02:00
Jeremy Fitzhardinge
8d28aab59f x86_64: add pseudo-features for 32-bit compat syscall
Add pseudo-feature bits to describe whether the CPU supports sysenter
and/or syscall from ia32-compat userspace.  This removes a hardcoded
test in vdso32-setup.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-11 15:44:57 +02:00
Ingo Molnar
3d0decc4f4 x86: fix tsc unification buglet with ftrace and stackprotector
Yinghai Lu reported crashes on 64-bit x86:

 BUG: unable to handle kernel NULL pointer dereference at 0000000000000000
 IP: [<ffffffff80253b17>] hrtick_start_fair+0x89/0x173
 [...]

And with a long session of debugging and a lot of difficulty, tracked it down
to this commit:

 --------------->
 8fbbc4b45c is first bad commit
 commit 8fbbc4b45c
 Author: Alok Kataria <akataria@vmware.com>
 Date:   Tue Jul 1 11:43:34 2008 -0700

     x86: merge tsc_init and clocksource code
 <--------------

The problem is that the TSC unification missed these Makefile rules
in arch/x86/kernel/Makefile:

  # Do not profile debug and lowlevel utilities
  CFLAGS_REMOVE_tsc_64.o = -pg
  CFLAGS_REMOVE_tsc_32.o = -pg
  ...
  CFLAGS_tsc_64.o         := $(nostackp)
  ...

which rules make sure that various instrumentation and debugging
facilities are disabled for code that might end up in a VDSO - such as
the TSC code.

Reported-and-bisected-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

Conflicts:

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-11 15:09:15 +02:00
Yinghai Lu
f361a450bf x86: introduce max_low_pfn_mapped for 64-bit
when more than 4g memory is installed, don't map the big hole below 4g.

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-11 10:24:04 +02:00
Yinghai Lu
f302a5bbe5 x86: reserve SLIT
save the SLIT, in case we are using fixmap to read it, and that fixmap
could be cleared by others.

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-11 10:22:33 +02:00
Yinghai Lu
69a7704d7a x86: e820: user-defined memory maps: remove the range instead of update it to reserved
also let mem= to print out modified e820 map too

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: Bernhard Walle <bwalle@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-11 10:21:24 +02:00
Jeremy Fitzhardinge
27cb0a75ba x86: fix compile error in current tip.git
Gas 2.15 complains about 32-bit registers being used in lea.

  AS      arch/x86/lib/copy_user_64.o
/local/scratch-2/jeremy/hg/xen/paravirt/linux/arch/x86/lib/copy_user_64.S: Assembler messages:
/local/scratch-2/jeremy/hg/xen/paravirt/linux/arch/x86/lib/copy_user_64.S:188: Error: `(%edx,%ecx,8)' is not a valid 64 bit base/index expression
/local/scratch-2/jeremy/hg/xen/paravirt/linux/arch/x86/lib/copy_user_64.S:257: Error: `(%edx,%ecx,8)' is not a valid 64 bit base/index expression
  AS      arch/x86/lib/copy_user_nocache_64.o
/local/scratch-2/jeremy/hg/xen/paravirt/linux/arch/x86/lib/copy_user_nocache_64.S: Assembler messages:
/local/scratch-2/jeremy/hg/xen/paravirt/linux/arch/x86/lib/copy_user_nocache_64.S:107: Error: `(%edx,%ecx,8)' is not a valid 64 bit base/index expression

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Vitaly Mayatskikh <v.mayatskih@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-10 21:55:59 +02:00
Linus Torvalds
9cc3089201 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:
  x86: fix /dev/mem compatibility under PAT
2008-07-10 11:19:53 -07:00
Ingo Molnar
39415a440e x86, VisWS: fix pci_direct_conf1 dependency
fix:

 arch/x86/pci/built-in.o: In function `pci_subsys_init':
 visws.c:(.init.text+0xfc5): undefined reference to `pci_direct_conf1'

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-10 20:10:48 +02:00
Ingo Molnar
c47277d2f8 x86, VisWS: build fix
fix:

 arch/x86/kernel/built-in.o: In function `visws_early_detect':
 : undefined reference to `mach_get_smp_config_quirk'
 arch/x86/kernel/built-in.o: In function `visws_early_detect':
 : undefined reference to `mach_find_smp_config_quirk'

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-10 19:52:07 +02:00
Glauber Costa
e54afe3863 x86: remove duplicate call to use_tsc_delay
Integration generated a duplicate call to use_tsc_delay.
Particularly, the one that is done before we check for general
tsc usability seems wrong.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-10 19:47:55 +02:00
Ingo Molnar
f78cb9b1cf x86, VisWS: build fix
fix:

arch/x86/kernel/visws_quirks.c: In function ‘visws_early_detect’:
arch/x86/kernel/visws_quirks.c:293: error: ‘no_broadcast’ undeclared (first use in this function)
arch/x86/kernel/visws_quirks.c:293: error: (Each undeclared identifier is reported only once
arch/x86/kernel/visws_quirks.c:293: error: for each function it appears in.)
make[1]: *** [arch/x86/kernel/visws_quirks.o] Error 1
make: *** [arch/x86/kernel/visws_quirks.o] Error 2

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-10 19:45:01 +02:00
Ingo Molnar
b6770c83b4 x86, VisWS: do not allow VisWS for Voyager
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-10 19:44:56 +02:00
Robert Richter
3a62ed73cc x86/pci: fix warnings in subsys_initcall functions
Signed-off-by: Robert Richter <robert.richter@amd.com>
Cc: Robert Richter <robert.richter@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-10 19:14:44 +02:00
Robert Richter
3f68f7d945 x86/pci merge: fixing numaq initialization
Patch d49c4288 (tip/x86/mpparse) introduced some changes in calling
subsys_init calls if CONFIG_X86_NUMAQ option is set. This patch
updates subsystem initalization according to this changes.

Signed-off-by: Robert Richter <robert.richter@amd.com>
Cc: Robert Richter <robert.richter@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-10 19:14:43 +02:00
Daniel Guilak
b10e9ad0f1 arch/x86/kernel/.gitignore: Added vmlinux.lds to .gitignore file because it shouldn't be tracked.
Signed-off-by: Daniel Guilak <daniel@danielguilak.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-10 10:13:51 -07:00
Ingo Molnar
15e551d25e x86, VisWS: turn into generic arch, eliminate Kconfig specials
remove leftover traces of various VISWS related Kconfig specials.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-10 18:55:47 +02:00
Ingo Molnar
62fa572f69 x86, VisWS: turn into generic arch, remove leftover files
remove leftover arch/x86/mach-visws/* files.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-10 18:55:45 +02:00
Ingo Molnar
26dd9fcfc2 x86, VisWS: turn into generic arch, clean up
merge traps_visws.c and apic_visws.c into visws_quirks.c.

(no code changed)

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-10 18:55:45 +02:00
Ingo Molnar
0cecf92db8 x86, VisWS: turn into generic arch, clean up
rename setup_visws.c to visws_quirks.c.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-10 18:55:44 +02:00
Ingo Molnar
54ce7f9906 x86, VisWS: turn into generic arch, IO-APIC setup fix
skip IO-APIC setup on a VISWS if it's enabled.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-10 18:55:43 +02:00
Ingo Molnar
efefa6f63f x86, VisWS: turn into generic arch, clean up
remove VISWS Kconfig complications, now that it's supported by the generic
architecture.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-10 18:55:43 +02:00
Ingo Molnar
1b84e1c81f x86, VisWS: turn into generic arch, flip over VISWS to generic arch
this is the big move: flip over VISWS to generic arch support.

From this commit on CONFIG_X86_VISWS is just another (default-disabled)
option that turns on certain quirks - no other complications.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-10 18:55:42 +02:00
Ingo Molnar
652536367b x86, VisWS: turn into generic arch, copy visws files
copy arch/x86/mach-visws/setup_visws.c, apic_visws.c and traps_visws.c
files to arch/x86/kernel/, in preparation of the switchover to a
non-subarch setup for VISWS.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-10 18:55:42 +02:00
Ingo Molnar
078c0bba55 x86, VisWS: turn into generic arch, add early quirks to default architectures
add early quirk support to the generic architecture code.

this allows VISWS to be supported by the generic code and allows us
to remove the VISWS subarch.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-10 18:55:41 +02:00
Ingo Molnar
b4b8641671 x86, VisWS: turn into generic arch, create include/asm-x86/visws/
move the include/asm-x86/mach-visws/ VISWS specific hardware
details include files into include/asm-x86/visws, to be used from
generic code.

No code changed.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-10 18:55:39 +02:00
Ingo Molnar
5548ed1135 x86, VisWS: turn into generic arch, install proper PCI quirk
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-10 18:55:33 +02:00
Ingo Molnar
5ab74722a4 x86, VisWS: turn into generic arch, use generic mpparse code
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-10 18:55:33 +02:00
Ingo Molnar
31ac409a79 x86, VisWS: turn into generic arch, add early init quirks
add early init quirks for VisWS. This gradually turns the VISWS subarch
into a generic PC architecture.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-10 18:55:32 +02:00
Ingo Molnar
22d5c67c5b x86, VisWS: turn into generic arch, make VisWS boot on a regular PC
first step: make the VISWS subarch boot on a regular PC.

We take various shortcuts for that. We copy the generic arch setup file over
into the VISWS setup file.

This is the only step that is not expected to boot on a real VISWS.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-10 18:55:32 +02:00
Ingo Molnar
3b33553bad x86: add early quirk support
Add early quirks support.

In preparation of enabling the generic architecture to boot on a VISWS.

This will allow us to remove the VISWS subarch and all its complications.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-10 18:55:31 +02:00
Ingo Molnar
f87f38ec5a Merge branch 'x86/unify-pci' into x86/core 2008-07-10 18:47:29 +02:00
Ingo Molnar
a6784ad7ea x86: fix visws and vsmp build
these two sub-architectures want PCI to be default-on, not default-off.

Reported-by: Robert Richter <robert.richter@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-10 12:34:54 +02:00
Maciej W. Rozycki
0b9f4f49e2 x86: I/O APIC: Add a 64-bit variation of replace_pin_at_irq()
When an interrupt is rerouted to a different I/O APIC pin the relevant
entry of the irq_2_pin list should get updated accordingly so that
operations are performed on the correct redirection entry.

This is already done by the 32-bit variation of the code and here is a
complementing 64-bit implementation.  Should make someone's decision less
tough when merging the two. ;)

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-10 11:04:05 +02:00
Ingo Molnar
c9076b6319 Revert "x86: fix IO APIC breakage on HP nx6325"
This reverts commit 90221a61a71b7ad659d8741cf1e404506b174982.

This too was just temporary diagnostics - not needed now that we've
got the final fix via:

| commit e2079c4386
| Author: Rafael J. Wysocki <rjw@sisk.pl>
| Date:   Tue Jul 8 16:12:26 2008 +0200
|
|     x86: fix C1E && nx6325 stability problem

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-10 11:00:50 +02:00
Ingo Molnar
2179bab7d4 Revert "x86: fix IO APIC breakage on HP nx6325, v2"
This reverts commit a74a1cc3df0be89658bc735c8aed80c8392e2c15.

This was just temporary diagnostics commit - not needed now that we've
got the final fix.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-10 10:59:59 +02:00
FUJITA Tomonori
18b743dc94 x86, AMD IOMMU: clean up Kconfig entry
AMD_IOMMU should depend on IOMMU_HELPER since they are the IOMMU
helper functions. SWIOTLB requires IOMMU_HELPER so declaring that
AMD_IOMMU depends on SWIOTLB properly fixes the problems.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-10 10:43:27 +02:00
Venkatesh Pallipadi
a361ee5cb8 x86: fix /dev/mem compatibility under PAT
Add ioremap_default(), which gives a sane mapping without worrying about
type conflicts.

Use it in /dev/mem read in place of ioremap(), as with ioremap(),
any mapping of the region (other than UC_MINUS) will cause a conflict
and failure of /dev/mem read.

Should address the vbetest failure reported at:

  http://bugzilla.kernel.org/show_bug.cgi?id=11057

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-10 10:09:59 +02:00
Yinghai Lu
3d43ecd286 x86: make e820_end return end_of_ram again for 64bit
even on 64bit systems with less than 4G RAM, we can now use fixmap
to handle acpi SIT near end of ram.

change e820_end to e820_end_of_ram again?
or e820_ram_pfn?

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-10 09:01:35 +02:00
Yinghai Lu
f34fa82b19 x86, acpi: merge __acpi_map_table
and let 64-bit to fall back to use fixmap too.

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-10 09:01:25 +02:00
Yinghai Lu
7b16eb8930 x86: overmapped fix when 4K pages on tail, 64-bit
fix phys_pmd_init to make sure not to return bigger value than end.

also print out range split:1G/2M/4K in init_memory_mapping().

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-10 08:46:40 +02:00