Commit Graph

23524 Commits

Author SHA1 Message Date
Suresh Siddha
4dc2f96cac x64, x2apic/intr-remap: ioapic routines which deal with initial io-apic RTE setup
Generic ioapic specific routines which be used later during enabling
interrupt-remapping.

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: akpm@linux-foundation.org
Cc: arjan@linux.intel.com
Cc: andi@firstfloor.org
Cc: ebiederm@xmission.com
Cc: jbarnes@virtuousgeek.org
Cc: steiner@sgi.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-12 08:44:56 +02:00
Suresh Siddha
d94d93ca5c x64, x2apic/intr-remap: 8259 specific mask/unmask routines
8259 specific mask/unmask routines which be used later while enabling
interrupt-remapping.

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: akpm@linux-foundation.org
Cc: arjan@linux.intel.com
Cc: andi@firstfloor.org
Cc: ebiederm@xmission.com
Cc: jbarnes@virtuousgeek.org
Cc: steiner@sgi.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-12 08:44:55 +02:00
Suresh Siddha
72b1e22dfc x64, x2apic/intr-remap: generic irq migration support from process context
Generic infrastructure for migrating the irq from the process context in the
presence of CONFIG_GENERIC_PENDING_IRQ.

This will be used later for migrating irq in the presence of
interrupt-remapping.

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: akpm@linux-foundation.org
Cc: arjan@linux.intel.com
Cc: andi@firstfloor.org
Cc: ebiederm@xmission.com
Cc: jbarnes@virtuousgeek.org
Cc: steiner@sgi.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-12 08:44:55 +02:00
Suresh Siddha
b6fcb33ad6 x64, x2apic/intr-remap: routines managing Interrupt remapping table entries.
Routines handling the management of interrupt remapping table entries.

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: akpm@linux-foundation.org
Cc: arjan@linux.intel.com
Cc: andi@firstfloor.org
Cc: ebiederm@xmission.com
Cc: jbarnes@virtuousgeek.org
Cc: steiner@sgi.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-12 08:44:54 +02:00
Suresh Siddha
2ae2101069 x64, x2apic/intr-remap: Interrupt remapping infrastructure
Interrupt remapping (part of Intel Virtualization Tech for directed I/O)
infrastructure.

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: akpm@linux-foundation.org
Cc: arjan@linux.intel.com
Cc: andi@firstfloor.org
Cc: ebiederm@xmission.com
Cc: jbarnes@virtuousgeek.org
Cc: steiner@sgi.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-12 08:44:53 +02:00
Suresh Siddha
ad3ad3f6a2 x64, x2apic/intr-remap: parse ioapic scope under vt-d structures
Parse the vt-d device scope structures to find the mapping between IO-APICs
and the interrupt remapping hardware units.

This will be used later for enabling Interrupt-remapping for IOAPIC devices.

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: akpm@linux-foundation.org
Cc: arjan@linux.intel.com
Cc: andi@firstfloor.org
Cc: ebiederm@xmission.com
Cc: jbarnes@virtuousgeek.org
Cc: steiner@sgi.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-12 08:44:50 +02:00
Suresh Siddha
1886e8a90a x64, x2apic/intr-remap: code re-structuring, to be used by both DMA and Interrupt remapping
Allocate the iommu during the parse of DMA remapping hardware
definition structures. And also, introduce routines for device
scope initialization which will be explicitly called during
dma-remapping initialization.

These will be used for enabling interrupt remapping separately from the
existing DMA-remapping enabling sequence.

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: akpm@linux-foundation.org
Cc: arjan@linux.intel.com
Cc: andi@firstfloor.org
Cc: ebiederm@xmission.com
Cc: jbarnes@virtuousgeek.org
Cc: steiner@sgi.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-12 08:44:48 +02:00
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
Ingo Molnar
6c82a000a2 Merge branch 'x86/generalize-visws' into x86/core 2008-07-11 21:22:18 +02:00
Glauber Costa
392a0fc96b x86: merge dwarf2 headers
Merge dwarf2_32.h and dwarf2_64.h into dwarf2.h.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-11 20:49:39 +02:00
Glauber Costa
d73a731abe x86: use AS_CFI instead of UNWIND_INFO
In dwarf2_32.h, test for CONFIG_AS_CFI instead of
CONFIG_UNWIND_INFO. Turns out that searching for UNWIND_INFO
returns no match in any Kconfig or Makefile, so we're really
just throwing everything away regarding dwarf frames for i386.

The test that generates CONFIG_AS_CFI does not have anything
x86_64-specific, and right now, checking V=1 builds shows me
that the flags is there anyway, although unused.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-11 20:49:35 +02:00
Glauber Costa
70f1bba4c8 x86: use ignore macro instead of hash comment
In dwarf_64.h header, use the "ignore" macro the way
i386 does.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-11 20:49:32 +02:00
Ingo Molnar
d9fc3fd3fa x86: fix savesegment() bug causing crashes on 64-bit
i spent a fair amount of time chasing a 64-bit bootup crash that manifested
itself as bootup segfaults:

  S10network[1825]: segfault at 7f3e2b5d16b8 ip 00000031108748c9 sp 00007fffb9c14c70 error 4 in libc-2.7.so[3110800000+14d000]

eventually causing init to die and panic the system:

  Kernel panic - not syncing: Attempted to kill init!
  Pid: 1, comm: init Not tainted 2.6.26-rc9-tip #13878

after a maratonic bisection session, the bad commit turned out to be:

| b7675791859075418199c7af86a116ea34eaf5bd is first bad commit
| commit b7675791859075418199c7af86a116ea34eaf5bd
| Author: Jeremy Fitzhardinge <jeremy@goop.org>
| Date:   Wed Jun 25 00:19:00 2008 -0400
|
|     x86: remove open-coded save/load segment operations
|
|     This removes a pile of buggy open-coded implementations of savesegment
|     and loadsegment.

after some more bisection of this patch itself, it turns out that what
makes the difference are the savesegment() changes to __switch_to().

Taking a look at this portion of arch/x86/kernel/process_64.o revealed
this crutial difference:

| good:    99c:       8c e0                   mov    %fs,%eax
|          99e:       89 45 cc                mov    %eax,-0x34(%rbp)
|
| bad:     99c:       8c 65 cc                mov    %fs,-0x34(%rbp)

which is due to:

|                 unsigned fsindex;
| -               asm volatile("movl %%fs,%0" : "=r" (fsindex));
| +               savesegment(fs, fsindex);

savesegment() is implemented as:

 #define savesegment(seg, value)                                \
          asm("mov %%" #seg ",%0":"=rm" (value) : : "memory")

note the "m" modifier - it allows GCC to generate the segment move
into a memory operand as well.

But regarding segment operands there's a subtle detail in the x86
instruction set: the above 16-bit moves are zero-extend, but only
if it goes to a register.

If it goes to a memory operand, -0x34(%rbp) in the above case, there's
no zero-extend to 32-bit and the instruction will only save 16 bits
instead of the intended 32-bit.

The other 16 bits is random data - which can cause problems when that
value is used later on.

The solution is to only allow segment operands to go to registers.
This fix allows my test-system to boot up without crashing.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-11 19:51:47 +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
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
Uwe Kleine-König
ac310bb5db Fix name of Russell King in various comments
This patch was created by

	git grep -E -l 'Rus(el|s?e)l King' | xargs -r -t perl -p -i -e 's/Rus(el|s?e)l King/Russell King/g'

Signed-off-by: Uwe Kleine-König <Uwe.Kleine-Koenig@digi.com>
Most-Definitely-Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-10 18:04:43 -07:00
Linus Torvalds
e5a5816f78 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (27 commits)
  tun: Persistent devices can get stuck in xoff state
  xfrm: Add a XFRM_STATE_AF_UNSPEC flag to xfrm_usersa_info
  ipv6: missed namespace context in ipv6_rthdr_rcv
  netlabel: netlink_unicast calls kfree_skb on error path by itself
  ipv4: fib_trie: Fix lookup error return
  tcp: correct kcalloc usage
  ip: sysctl documentation cleanup
  Documentation: clarify tcp_{r,w}mem sysctl docs
  netfilter: nf_nat_snmp_basic: fix a range check in NAT for SNMP
  netfilter: nf_conntrack_tcp: fix endless loop
  libertas: fix memory alignment problems on the blackfin
  zd1211rw: stop beacons on remove_interface
  rt2x00: Disable synchronization during initialization
  rc80211_pid: Fix fast_start parameter handling
  sctp: Add documentation for sctp sysctl variable
  ipv6: fix race between ipv6_del_addr and DAD timer
  irda: Fix netlink error path return value
  irda: New device ID for nsc-ircc
  irda: via-ircc proper dma freeing
  sctp: Mark the tsn as received after all allocations finish
  ...
2008-07-10 17:58:47 -07:00
Steffen Klassert
ccf9b3b83d xfrm: Add a XFRM_STATE_AF_UNSPEC flag to xfrm_usersa_info
Add a XFRM_STATE_AF_UNSPEC flag to handle the AF_UNSPEC behavior for
the selector family. Userspace applications can set this flag to leave
the selector family of the xfrm_state unspecified.  This can be used
to to handle inter family tunnels if the selector is not set from
userspace.

Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-07-10 16:55:37 -07:00
Ingo Molnar
8bfaba873f x86, VisWS: turn into generic arch, add NR_IRQS quirk
NR_IRQS: let VISWS be just a sub-case of the generic code.

This can create a somewhat larger irq_desc[] array if NR_CPUS is high
but that should not worry VisWS which has 4 CPUs at most.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-10 18:55:41 +02:00
Ingo Molnar
4191894b68 x86, VisWS: turn into generic arch, eliminate include/asm-x86/mach-visws/setup_arch.h
use the generic version of setup_arch.h - it's the same.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-10 18:55:40 +02:00
Ingo Molnar
efd746b889 x86, VisWS: turn into generic arch, move definitions
move the SGIVW definitions from setup_arch.h into its own header file.

preparation for turning VISWS into a generic PC architecture.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-10 18:55:40 +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
18c413e27e x86, VisWS: turn into generic arch, eliminate asm-x86/mach-visws/mach_apicdef.h
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-10 18:55:38 +02:00
Ingo Molnar
b70d9c2473 x86, VisWS: turn into generic arch, update asm-x86/mach-visws/mach_apicdef.h
update asm-x86/mach-visws/mach_apicdef.h to the generic version.

This should work fine as VISWS has a standard local APIC and thus
its mach_apicdef.h copy is just an ancient version of the generic code.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-10 18:55:37 +02:00
Ingo Molnar
6649ababd5 x86, VisWS: turn into generic arch, eliminate include/asm-x86/mach-visws/smpboot_hooks.h
now that include/asm-x86/mach-visws/smpboot_hooks.h equals
to the default file in ../mach-default/smpboot_hooks.h, simply
include it instead of maintaining a copy.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-10 18:55:36 +02:00
Ingo Molnar
244a5e2ee0 x86, VisWS: turn into generic arch, update include/asm-x86/mach-visws/smpboot_hooks.h
update include/asm-x86/mach-visws/smpboot_hooks.h to
include/asm-x86/mach-default/smpboot_hooks.h (the generic version).

this _should_ work, because VISWS sets skip_ioapic_setup, but it
should be tested on a real VISWS to make sure.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-10 18:55:36 +02:00
Ingo Molnar
6a64b5da9b x86, VisWS: turn into generic arch, enhance include/asm-x86/mach-default/smpboot_hooks.h
Allow the generic smpboot quirks code to be built with
ONFIG_X86_IO_APIC disabled. This way VISWS will be able
to use it as-is.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-10 18:55:35 +02:00
Ingo Molnar
d8d1bc73f0 x86, VisWS: turn into generic arch, eliminate include/asm-x86/mach-visws/mach_apic.h
now that include/asm-x86/mach-visws/mach_apic.h equals
to include/asm-x86/mach-default/mach_apic.h, simply start
using the generic one.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-10 18:55:34 +02:00
Ingo Molnar
808fc878d3 x86, VisWS: turn into generic arch, update asm-x86/mach-visws/mach_apic.h
update asm-x86/mach-visws/mach_apic.h to the generic version.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-10 18:55:34 +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
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
FUJITA Tomonori
e93be88d7e x86: clean up iommu.h and gart.h
This remove lots of duplications in iommu.h and gart.h.

The end result of this patch is:

- iommu.h is a header file for everyone related with IOMMUs.

- gart.h is the private header file. Only pci-gart_64.c and its friends
  include it.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: fujita.tomonori@lab.ntt.co.jp
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-10 10:43:26 +02:00
Ingo Molnar
849567b936 Merge branch 'x86/gart' into x86/core 2008-07-10 10:43:11 +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
Ingo Molnar
4fb3dc2729 x86: build fix for "x86: fix C1E && nx6325 stability problem"
fix:

 arch/x86/kernel/built-in.o: In function `dmi_ignore_irq0_timer_override':
 boot.c:(.init.text+0x3ea4): undefined reference to `force_mask_ioapic_irq_2'

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-10 08:09:08 +02:00
Vitaly Mayatskikh
1129585a08 x86: introduce copy_user_handle_tail() routine
Introduce generic C routine for handling necessary tail operations after
protection fault in copy_*_user on x86.

Signed-off-by: Vitaly Mayatskikh <v.mayatskih@gmail.com>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-09 15:51:03 +02:00
Ingo Molnar
de989ef093 Merge branch 'x86/unify-lib' into x86/core 2008-07-09 15:00:48 +02:00
Ingo Molnar
d028203c04 Merge branch 'x86/core' into x86/unify-pci 2008-07-09 11:39:02 +02:00
Rafael J. Wysocki
e2079c4386 x86: fix C1E && nx6325 stability problem
The problems are that, with the ACPI vs timer overring issue _fixed_,
after using the box for some time (between several seconds and 1 hour, at
random) processes get very high CPU loads (once I've got X using 107% of
the CPU, for example) and the system becomes unresponsive, as though there
were interrupts lost or something similar.

Andreas Herrman reproduced similar problems:

> Ok, now I've reproduced the stability problem.
> - Using tip/master,
> - reverting e38502eb8aa82314d5ab0eba45f50e6790dadd88 and
> - applying your patch from this posting
>   http://marc.info/?l=linux-kernel&m=121539354224562&w=4
>
> Starting X, firefox, gimp, tuxpaint and doing some drawing in tuxpaint
> results in a slow system. Drawing is almost not possible anymore --
> Selections of new colors, cursors etc. is performed with huge delay
> if it's performed at all.
>
> BTW, the code sets up timer IRQ as Virtual Wire IRQ:
>
> Jul  8 14:57:58 kodscha IO-APIC (apicid-pin) 2-22, 2-23 not connected.
> Jul  8 14:57:58 kodscha ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1
> Jul  8 14:57:58 kodscha ...trying to set up timer as Virtual Wire IRQ... works.
>
> and both INT0 and INT2 of IOAPIC are masked:
>
> Jul  8 14:57:58 kodscha NR Dst Mask Trig IRR Pol Stat Dmod Deli Vect:
> Jul  8 14:57:58 kodscha 00 000 1    0    0   0   0    0    0    00
> Jul  8 14:57:58 kodscha 01 003 0    0    0   0   0    1    1    31
> Jul  8 14:57:58 kodscha 02 003 1    0    0   0   0    0    0    30
>
> I've also seen strange CPU utilization -- with syslog-ng:
>
> top - 15:33:06 up 35 min,  4 users,  load average: 1.70, 0.68, 0.37
> Tasks:  64 total,   4 running,  60 sleeping,   0 stopped,   0 zombie
> Cpu0  :  0.0%us,100.0%sy,  0.0%ni,  0.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
> Cpu1  :  6.4%us, 87.2%sy,  0.0%ni,  5.8%id,  0.0%wa,  0.6%hi,  0.0%si,  0.0%st
> Mem:    895384k total,   283568k used,   611816k free,    35492k buffers
> Swap:  1959920k total,        0k used,  1959920k free,   163044k cached
>
>   PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
>  4632 root      20   0 17216  800  580 S  104  0.1   0:34.22 syslog-ng
> 28505 root      20   0  205m  11m 4024 S    6  1.3   0:21.16 X
> 28518 root      20   0 56292 5652 4492 S    1  0.6   0:01.80 fluxbox
>     1 root      20   0  3724  608  508 S    0  0.1   0:00.36 init
>
> So far I have no clue why C1E-idle in conjunction with virtual wire
> mode causes this strange behaviour.
>
> ... and I start to think about the root cause of all this.
>
> I've performed similar tests under X with the IRQ0/INT0 configuration and
> I did not see above symptoms.

So lets fall back to the IRQ0/INT0 configuration on this box.

This basically restores the dont-use-the-lapic-timer exception mechanism
that was unconditional on this box prior commit 8750bf5 ("x86: add C1E
aware idle function").

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-09 11:03:21 +02:00
FUJITA Tomonori
8cbfd4f44d x86, iommu: replace CONFIG_IOMMU with CONFIG_GART_IOMMU in iommu.h
Hmm, looks like it would be nice to have more cleanups of iommu.h and
gart.h.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-09 10:53:13 +02:00
Yinghai Lu
2dc807b37b x86: make max_pfn cover acpi table below 4g
When system have 4g less ram installed, and acpi table sit
near end of ram, make max_pfn cover them too,
so 64bit kernel don't need to mess up fixmap.

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>
2008-07-09 10:43:25 +02:00
Glauber Costa
22cac16707 x86: define architectural characteristics in uaccess.h.
Remove them from the arch-specific file.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-09 09:14:29 +02:00
Glauber Costa
8bc7de0c5d x86: put movsl_mask into uaccess.h.
x86_64 does not need it, but it won't have X86_INTEL_USERCOPY
defined either.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-09 09:14:28 +02:00
Glauber Costa
8cb834e99f x86: move __get_user and __put_user into uaccess.h.
We also carry the unaligned version with us. Only x86_64 uses
it, but there's no problem in defining it.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-09 09:14:27 +02:00
Glauber Costa
e30a44fdbf x86: merge put_user.
Move both versions, which are highly similar, to uaccess.h.
Note that, for x86_64, X86_WP_WORKS_OK is always defined.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-09 09:14:26 +02:00
Glauber Costa
ec840956d2 x86: turn __put_user_check directly into put_user.
We also check user pointer in x86_64 put_user, the way i386 does.

In a separate patch for bisecting purposes.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-09 09:14:26 +02:00
Glauber Costa
64a978c1e3 x86: be more explicit in __put_user_x.
For both __put_user_x and __put_user_8 macros, pass the error
variable explicitly.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-09 09:14:25 +02:00
Glauber Costa
3f16822116 x86: merge __get_user_asm and its users.
Move __get_user_asm and __get_user_size and __get_user_nocheck
to uaccess.h. This requires us to define a macro at __get_user_size
for the 64-bit access case.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-09 09:14:24 +02:00
Glauber Costa
6fd4725d75 x86: don't always use EFAULT on __get_user_size.
Let the user of the macro specify the desired return.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-09 09:14:23 +02:00