This patch creates a new interface for IOMMUs by adding a centralized
location for IOMMU allocation (for translation tables/apertures) and
IOMMU initialization.  In creating these, code was moved around for
abstraction, uniformity, and consiceness.

Take note of the move of the iommu_setup bootarg parsing code to
__setup.  This is enabled by moving back the location of the aperture
allocation/detection to mem init (which while ugly, was already the
location of the swiotlb_init).

While a slight departure from the previous patch, I belive this provides
the true intention of the previous versions of the patch which changed
this code.  It also makes the addition of the upcoming calgary code much
cleaner than previous patches.

[AK: Removed one broken change. iommu_setup still has to be called
early]
Signed-off-by: NMuli Ben-Yehuda <muli@il.ibm.com>
Signed-off-by: NJon Mason <jdmason@us.ibm.com>
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Based on Andi Kleen's comments on the original Calgary patch, move
valid_dma_direction into the calling functions.
Signed-off-by: NMuli Ben-Yehuda <muli@il.ibm.com>
Signed-off-by: NJon Mason <jdmason@us.ibm.com>
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

swiotlb relies on the gart specific iommu_aperture variable to know if
we discovered a hardware IOMMU before swiotlb initialization.  Introduce
iommu_detected to do the same thing, but in a HW IOMMU neutral manner,
in preparation for adding the Calgary HW IOMMU.
Signed-Off-By: NMuli Ben-Yehuda <muli@il.ibm.com>
Signed-Off-By: NJon Mason <jdmason@us.ibm.com>
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Minor cleanup patch:

Replacing the asm statement with cpuid_count macro(which already
provides the same functionality).
Signed-off-by: NRohit Seth <rohitseth@google.com>
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Use abstractions whenever possible.
Signed-off-by: NJan Beulich <jbeulich@novell.com>
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

pud_offset_k() equivalent to pud_offset() now.  Pointed out by Jan Beulich
Similar for __pud_offset_ok, which needs a small change in the callers.
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Clean up arch/{i386,x86_64}/boot/compressed/misc.c a bit to reduce their
differences. Should have zero effect on code generation.
Signed-off-by: NCarl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Add proper conditionals to be able to build with CONFIG_MODULES=n.
Signed-off-by: NJan Beulich <jbeulich@novell.com>
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

If no unwinding is possible at all for a certain exception instance,
fall back to the old style call trace instead of not showing any trace
at all.

Also, allow setting the stack trace mode at the command line.
Signed-off-by: NJan Beulich <jbeulich@novell.com>
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

To increase the usefulness of reliable stack unwinding, this adds CFI
unwind annotations to many low-level i386 routines.
Signed-off-by: NJan Beulich <jbeulich@novell.com>
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

These are the i386-specific pieces to enable reliable stack traces. This is
going to be even more useful once CFI annotations get added to he assembly
code, namely to entry.S.
Signed-off-by: NJan Beulich <jbeulich@novell.com>
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Adjust the CFA offset for 64- and 32-bit syscall entries so that the five
slots pre-subtracted from the stack pointer do not appear to reside outside
of the current frame.
Signed-off-by: NJan Beulich <jbeulich@novell.com>
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Change the switching to/from the IRQ stack so that unwind annotations can
be added for it without requiring CFA expressions.

AK: I cleaned it up a bit, making it unconditional and removing the
obsolete DEBUG_INFO full frame code.
Signed-off-by: NJan Beulich <jbeulich@novell.com>
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

These are the x86_64-specific pieces to enable reliable stack traces. The
only restriction with this is that it currently cannot unwind across the
interrupt->normal stack boundary, as that transition is lacking proper
annotation.
Signed-off-by: NJan Beulich <jbeulich@novell.com>
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

These are the generic bits needed to enable reliable stack traces based
on Dwarf2-like (.eh_frame) unwind information. Subsequent patches will
enable x86-64 and i386 to make use of this.

Thanks to Andi Kleen and Ingo Molnar, who pointed out several possibilities
for improvement.
Signed-off-by: NJan Beulich <jbeulich@novell.com>
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

  In x86_64 architecture, if device driver with msi function
gets 0xee vector by assign_irq_vector() function, system will
crash if this interrupt happens. It is because 0xee interrupt
entry is empty. This patch modifies this. This patch is based
on 2.6.17-rc6.
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

 - Rename the GART_IOMMU option to IOMMU to make clear it's not
   just for AMD
 - Rewrite the help text to better emphatise this fact
 - Make it an embedded option because too many people get it wrong.

To my astonishment I discovered the aacraid driver tests this
symbol directly. This looks quite broken to me - it's an internal
implementation detail of the PCI DMA API. Can the maintainer
please clarify what this test was intended to do?

Cc: linux-scsi@vger.kernel.org
Cc: alan@redhat.com
Cc: markh@osdl.org
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Previously it would only work in the first 32bit system call, not during
early process setup.
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Fix a potential deadlock scenario introduced by io_apic.c's new vector_lock
on i386 and x86_64.

Found by the locking correctness validator. The patch was boot-tested on
x86. For details of the deadlock scenario, see the validator output:

  ======================================================
  [ BUG: hard-safe -> hard-unsafe lock order detected! ]
  ------------------------------------------------------
  idle/1 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire:
   (msi_lock){....}, at: [<c04ff8d2>] startup_msi_irq_wo_maskbit+0x10/0x35

  and this task is already holding:
   (&irq_desc[i].lock){++..}, at: [<c015b924>] probe_irq_on+0x36/0x107
  which would create a new lock dependency:
   (&irq_desc[i].lock){++..} -> (msi_lock){....}

  but this new dependency connects a hard-irq-safe lock:
   (&irq_desc[i].lock){++..}
  ... which became hard-irq-safe at:
    [<c01468c4>] lockdep_acquire+0x68/0x84
    [<c10485e9>] _spin_lock+0x21/0x2f
    [<c015aff5>] __do_IRQ+0x3d/0x113
    [<c01062d3>] do_IRQ+0x8c/0xad

  to a hard-irq-unsafe lock:
   (vector_lock){--..}
  ... which became hard-irq-unsafe at:
  ...  [<c01468c4>] lockdep_acquire+0x68/0x84
    [<c10485e9>] _spin_lock+0x21/0x2f
    [<c011b5e8>] assign_irq_vector+0x34/0xc8
    [<c1aa82fa>] setup_IO_APIC+0x45a/0xcff
    [<c1aa56e3>] smp_prepare_cpus+0x5ea/0x8aa
    [<c010033f>] init+0x32/0x2cb
    [<c0102005>] kernel_thread_helper+0x5/0xb

  which could potentially lead to deadlocks!

  other info that might help us debug this:

  3 locks held by idle/1:
   #0:  (port_mutex){--..}, at: [<c067070d>] uart_add_one_port+0x61/0x289
   #1:  (&state->mutex){--..}, at: [<c067071f>] uart_add_one_port+0x73/0x289
   #2:  (&irq_desc[i].lock){++..}, at: [<c015b924>] probe_irq_on+0x36/0x107

  the hard-irq-safe lock's dependencies:
  -> (&irq_desc[i].lock){++..} ops: 9861 {
     initial-use  at:
                          [<c01468c4>] lockdep_acquire+0x68/0x84
                          [<c10487f4>] _spin_lock_irqsave+0x2a/0x3a
                          [<c015b415>] setup_irq+0x9b/0x14d
                          [<c1aaa4c4>] time_init_hook+0xf/0x11
                          [<c1a9f320>] time_init+0x44/0x46
                          [<c1a9955f>] start_kernel+0x191/0x38f
                          [<c0100210>] 0xc0100210
     in-hardirq-W at:
                          [<c01468c4>] lockdep_acquire+0x68/0x84
                          [<c10485e9>] _spin_lock+0x21/0x2f
                          [<c015aff5>] __do_IRQ+0x3d/0x113
                          [<c01062d3>] do_IRQ+0x8c/0xad
     in-softirq-W at:
                          [<c01468c4>] lockdep_acquire+0x68/0x84
                          [<c10485e9>] _spin_lock+0x21/0x2f
                          [<c015aff5>] __do_IRQ+0x3d/0x113
                          [<c01062d3>] do_IRQ+0x8c/0xad
   }
   ... key      at: [<c1ea31e0>] irq_desc_lock_type+0x0/0x20
    -> (i8259A_lock){++..} ops: 5149 {
       initial-use  at:
                        [<c01468c4>] lockdep_acquire+0x68/0x84
                        [<c10487f4>] _spin_lock_irqsave+0x2a/0x3a
                        [<c0108090>] init_8259A+0x11/0x8f
                        [<c1aa0d22>] init_ISA_irqs+0x12/0x4d
                        [<c1aaa4f0>] pre_intr_init_hook+0x8/0xa
                        [<c1aa0cb9>] init_IRQ+0xe/0x65
                        [<c1a99546>] start_kernel+0x178/0x38f
                        [<c0100210>] 0xc0100210
       in-hardirq-W at:
                        [<c01468c4>] lockdep_acquire+0x68/0x84
                        [<c10487f4>] _spin_lock_irqsave+0x2a/0x3a
                        [<c0107fb0>] mask_and_ack_8259A+0x1b/0xcc
                        [<c015b007>] __do_IRQ+0x4f/0x113
                        [<c01062d3>] do_IRQ+0x8c/0xad
       in-softirq-W at:
                        [<c01468c4>] lockdep_acquire+0x68/0x84
                        [<c10487f4>] _spin_lock_irqsave+0x2a/0x3a
                        [<c0107fb0>] mask_and_ack_8259A+0x1b/0xcc
                        [<c015b007>] __do_IRQ+0x4f/0x113
                        [<c01062d3>] do_IRQ+0x8c/0xad
     }
     ... key      at: [<c142f174>] i8259A_lock+0x14/0x40
   ... acquired at:
     [<c01468c4>] lockdep_acquire+0x68/0x84
     [<c10487f4>] _spin_lock_irqsave+0x2a/0x3a
     [<c0107eb2>] enable_8259A_irq+0x10/0x47
     [<c0107f12>] startup_8259A_irq+0x8/0xc
     [<c015b45e>] setup_irq+0xe4/0x14d
     [<c1aaa4c4>] time_init_hook+0xf/0x11
     [<c1a9f320>] time_init+0x44/0x46
     [<c1a9955f>] start_kernel+0x191/0x38f
     [<c0100210>] 0xc0100210

    -> (ioapic_lock){+...} ops: 122 {
       initial-use  at:
                        [<c01468c4>] lockdep_acquire+0x68/0x84
                        [<c10487f4>] _spin_lock_irqsave+0x2a/0x3a
                        [<c1aa71db>] io_apic_get_version+0x16/0x55
                        [<c1aa5c73>] mp_register_ioapic+0xc6/0x127
                        [<c1aa382e>] acpi_parse_ioapic+0x2d/0x39
                        [<c1abe031>] acpi_table_parse_madt_family+0xb4/0x100
                        [<c1abe093>] acpi_table_parse_madt+0x16/0x18
                        [<c1aa3c8a>] acpi_boot_init+0x132/0x251
                        [<c1aa08ea>] setup_arch+0xd36/0xe37
                        [<c1a99434>] start_kernel+0x66/0x38f
                        [<c0100210>] 0xc0100210
       in-hardirq-W at:
                        [<c01468c4>] lockdep_acquire+0x68/0x84
                        [<c10487f4>] _spin_lock_irqsave+0x2a/0x3a
                        [<c011bce1>] mask_IO_APIC_irq+0x11/0x31
                        [<c011c5cc>] ack_edge_ioapic_vector+0x31/0x41
                        [<c015b007>] __do_IRQ+0x4f/0x113
                        [<c01062d3>] do_IRQ+0x8c/0xad
     }
     ... key      at: [<c1432514>] ioapic_lock+0x14/0x3c
      -> (i8259A_lock){++..} ops: 5149 {
         initial-use  at:
                         [<c01468c4>] lockdep_acquire+0x68/0x84
                         [<c10487f4>] _spin_lock_irqsave+0x2a/0x3a
                         [<c0108090>] init_8259A+0x11/0x8f
                         [<c1aa0d22>] init_ISA_irqs+0x12/0x4d
                         [<c1aaa4f0>] pre_intr_init_hook+0x8/0xa
                         [<c1aa0cb9>] init_IRQ+0xe/0x65
                         [<c1a99546>] start_kernel+0x178/0x38f
                         [<c0100210>] 0xc0100210
         in-hardirq-W at:
                         [<c01468c4>] lockdep_acquire+0x68/0x84
                         [<c10487f4>] _spin_lock_irqsave+0x2a/0x3a
                         [<c0107fb0>] mask_and_ack_8259A+0x1b/0xcc
                         [<c015b007>] __do_IRQ+0x4f/0x113
                         [<c01062d3>] do_IRQ+0x8c/0xad
         in-softirq-W at:
                         [<c01468c4>] lockdep_acquire+0x68/0x84
                         [<c10487f4>] _spin_lock_irqsave+0x2a/0x3a
                         [<c0107fb0>] mask_and_ack_8259A+0x1b/0xcc
                         [<c015b007>] __do_IRQ+0x4f/0x113
                         [<c01062d3>] do_IRQ+0x8c/0xad
       }
       ... key      at: [<c142f174>] i8259A_lock+0x14/0x40
     ... acquired at:
     [<c01468c4>] lockdep_acquire+0x68/0x84
     [<c10487f4>] _spin_lock_irqsave+0x2a/0x3a
     [<c0107e6b>] disable_8259A_irq+0x10/0x47
     [<c011bdbd>] startup_edge_ioapic_vector+0x31/0x58
     [<c015b45e>] setup_irq+0xe4/0x14d
     [<c015b5a1>] request_irq+0xda/0xf9
     [<c1ac983a>] rtc_init+0x6a/0x1a7
     [<c0100457>] init+0x14a/0x2cb
     [<c0102005>] kernel_thread_helper+0x5/0xb

   ... acquired at:
     [<c01468c4>] lockdep_acquire+0x68/0x84
     [<c10487f4>] _spin_lock_irqsave+0x2a/0x3a
     [<c011bce1>] mask_IO_APIC_irq+0x11/0x31
     [<c011c5cc>] ack_edge_ioapic_vector+0x31/0x41
     [<c015b007>] __do_IRQ+0x4f/0x113
     [<c01062d3>] do_IRQ+0x8c/0xad

  the hard-irq-unsafe lock's dependencies:
  -> (vector_lock){--..} ops: 31 {
     initial-use  at:
                          [<c01468c4>] lockdep_acquire+0x68/0x84
                          [<c10485e9>] _spin_lock+0x21/0x2f
                          [<c011b5e8>] assign_irq_vector+0x34/0xc8
                          [<c1aa82fa>] setup_IO_APIC+0x45a/0xcff
                          [<c1aa56e3>] smp_prepare_cpus+0x5ea/0x8aa
                          [<c010033f>] init+0x32/0x2cb
                          [<c0102005>] kernel_thread_helper+0x5/0xb
     softirq-on-W at:
                          [<c01468c4>] lockdep_acquire+0x68/0x84
                          [<c10485e9>] _spin_lock+0x21/0x2f
                          [<c011b5e8>] assign_irq_vector+0x34/0xc8
                          [<c1aa82fa>] setup_IO_APIC+0x45a/0xcff
                          [<c1aa56e3>] smp_prepare_cpus+0x5ea/0x8aa
                          [<c010033f>] init+0x32/0x2cb
                          [<c0102005>] kernel_thread_helper+0x5/0xb
     hardirq-on-W at:
                          [<c01468c4>] lockdep_acquire+0x68/0x84
                          [<c10485e9>] _spin_lock+0x21/0x2f
                          [<c011b5e8>] assign_irq_vector+0x34/0xc8
                          [<c1aa82fa>] setup_IO_APIC+0x45a/0xcff
                          [<c1aa56e3>] smp_prepare_cpus+0x5ea/0x8aa
                          [<c010033f>] init+0x32/0x2cb
                          [<c0102005>] kernel_thread_helper+0x5/0xb
   }
   ... key      at: [<c1432574>] vector_lock+0x14/0x3c

  stack backtrace:
   [<c0104f36>] show_trace+0xd/0xf
   [<c010543e>] dump_stack+0x17/0x19
   [<c0144e34>] check_usage+0x1f6/0x203
   [<c0146395>] __lockdep_acquire+0x8c2/0xaa5
   [<c01468c4>] lockdep_acquire+0x68/0x84
   [<c10487f4>] _spin_lock_irqsave+0x2a/0x3a
   [<c04ff8d2>] startup_msi_irq_wo_maskbit+0x10/0x35
   [<c015b932>] probe_irq_on+0x44/0x107
   [<c0673d58>] serial8250_config_port+0x84b/0x986
   [<c06707b1>] uart_add_one_port+0x105/0x289
   [<c1ace54b>] serial8250_init+0xc3/0x10a
   [<c0100457>] init+0x14a/0x2cb
   [<c0102005>] kernel_thread_helper+0x5/0xb
Signed-off-by: NIngo Molnar <mingo@elte.hu>
Cc: Jan Beulich <jbeulich@novell.com>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

include/asm-x86_64/gart-mapping.h is only ever used in
arch/x86_64/kernel/setup.c and none of its contents are referenced.
Looks to be leftover cruft not removed in the dma_ops patch.
Signed-off-by: NJon Mason <jdmason@us.ibm.com>
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Use inline code bitmaps <= BITS_PER_LONG in bitmap_weight. This
gives _much_ better code.
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

It was originally added for 2.4 oprofile, but 2.6 oprofile doesn't
need that anymore. Shouldn't be any use in tree anymore and it doesn't
make much sense to export the ia32 syscalls when the main syscalls
are not exported.

I think Adrian Bunk asked for removing it several times.

Also included hunk from Adrian to remove the .globl ia32_sys_call_table
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Early development of x86-64 Linux was in CVS, but that hasn't been
the case for a long time now. Remove the obsolete $Id$s.
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Misc header cleanup for nmi watchdog.
Signed-off-by: NDon Zickus <dzickus@redhat.com>
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

fix unlikely profiling in vsyscalls ...
Signed-off-by: NIngo Molnar <mingo@elte.hu>
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Since END()/ENDPROC() are now available, add respective annotations to
x86_64's entry.S. This should help debugging activities.
Signed-off-by: NJan Beulich <jbeulich@novell.com>
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Sometimes e.g. with crashme the compat layer warnings can be noisy.
Add a way to turn them off by gating all output through compat_printk
that checks a global sysctl. The default is not changed.
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Fix

initcall at 0xffffffff806c5b89: pci_iommu_init+0x0/0x53c(): returned with error code -1

Return -ENODEV instead when the IOMMU is not used.
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Simplify (remove duplication of) code in ioapic_register_intr().
Signed-off-by: NJan Beulich <jbeulich@novell.com>
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Since assign_irq_vector() can be called at runtime, its access of static
variables should be protected by a lock.
Signed-off-by: NJan Beulich <jbeulich@novell.com>
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

 - Factor out the duplicated access/cache code into a single file
   * Shared between i386/x86-64.
 - Share flush code between AGP and IOMMU
   * Fix a bug: AGP didn't wait for end of flush before
 - Drop 8 northbridges limit and allocate dynamically
 - Add lock to serialize AGP and IOMMU GART flushes
 - Add PCI ID for next AMD northbridge
 - Random related cleanups

The old K8 NUMA discovery code is unchanged. New systems
should all use SRAT for this.

Cc: "Navin Boppuri" <navin.boppuri@newisys.com>
Cc: Dave Jones <davej@redhat.com>
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

A trivial change to have gart_unmap_sg call gart_unmap_single directly,
instead of bouncing through the dma_unmap_single wrapper in
dma-mapping.h.

This change required moving the gart_unmap_single above gart_unmap_sg,
and under gart_map_single (which seems a more logical place that its
current location IMHO).
Signed-off-by: NJon Mason <jdmason@us.ibm.com>
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Previously we would just silently provide 64 bit services
for this to 32bit processes.

I also added all the other cases explicitely to the ptrace
compat wrapper to make sure this doesn't happen again.

And removed one bogus check in the wrapper.
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Allow search for a contiguous block of iommu space to cross the next_bit
marker if we have already committed ourselves to flushing the gart.

There shouldn't be any reason why we'd restrict the search.
Signed-off-by: NMike Waychison <mikew@google.com>
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

enable large bzImages on x86_64. (fix is from x86's build.c) Using this
patch i have successfully built and booted an allyesconfig 13MB+ bzImage
on x86_64 too:

 $ size64 vmlinux
    text    data     bss     dec     hex filename
 23444831        8202642 3439360 35086833        21761f1 vmlinux

 -rw-rw-r--  1 mingo mingo 13121740 Apr 19 09:32 arch/x86_64/boot/bzImage
Signed-off-by: NIngo Molnar <mingo@elte.hu>
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

It's only needed for three system calls, no need to maintain
a full list forever.
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Replace hard coded DMA masks with #defines from
include/linux/dma-mapping.h
Signed-off-by: NJon Mason <jdmason@us.ibm.com>
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Changes are largely identical to the i386 version:

 * alternative #define are moved to the new alternative.h file.
 * one new elf section with pointers to the lock prefixes which can be
   nop'ed out for non-smp.
 * two new elf sections simliar to the "classic" alternatives to
   replace SMP code with simpler UP code.
 * fixup headers to use alternative.h instead of defining their own
   LOCK / LOCK_PREFIX macros.

The patch reuses the i386 version of the alternatives code to avoid code
duplication.  The code in alternatives.c was shuffled around a bit to
reduce the number of #ifdefs needed.  It also got some tweaks needed for
x86_64 (vsyscall page handling) and new features (noreplacement option
which was x86_64 only up to now).  Debug printk's are changed from
compile-time to runtime.

Loosely based on a early version from Bastian Blank <waldi@debian.org>
Signed-off-by: NGerd Hoffmann <kraxel@suse.de>
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Intel systems report the cache level data from CPUID 4 in sysfs.
Add a CPUID 4 emulation for AMD CPUs to report the same
information for them. This allows programs to read this
information in a uniform way.

The AMD way to report this is less flexible so some assumptions
are hardcoded (e.g. no L3)
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>