Building an allyesconfig doesn't reveal a hidden need
for any of these.  Since module.h brings in the whole kitchen
sink, it just needlessly adds 30k+ lines to the cpp burden.
Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>

Many of the core sparc kernel files are not modules, but just
including module.h for exporting symbols.  Now these files can
use the lighter footprint export.h for this role.
Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>

These files are only exporting symbols, so they don't need
the full module.h header file.  Previously they were getting
access to EXPORT_SYMBOL implicitly via overuse of module.h
from within other .h files, but that is being cleaned up.
Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>

Building sparc64 with the module.h cleanup reveals this implicit
include being taken advantage of:

arch/sparc/kernel/mdesc.c: In function 'mdesc_read':
arch/sparc/kernel/mdesc.c:900: error: implicit declaration of function 'copy_to_user'

Fix it up before the implicit module.h presence is removed.
Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>

To resolve these on 64bit allnoconfig builds:

  CC      arch/sparc/kernel/pcr.o
arch/sparc/kernel/pcr.c: In function 'register_perf_hsvc':
arch/sparc/kernel/pcr.c:102: error: 'tlb_type' undeclared (first use in this function)

  CC      arch/sparc/kernel/of_device_64.o
arch/sparc/kernel/of_device_64.c: In function 'build_device_resources':
arch/sparc/kernel/of_device_64.c:406: error: 'tlb_type' undeclared (first use in this function)
Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>

Things like module_param and core_param come from the header
moduleparam.h -- these files were relying on the fact that
module.h is implicitly present everywhere and it in turn
includes the moduleparam header.
Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>

These files will fail to compile if we dont clean them up in advance
and have them include the appropriate headers they need.
Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>

These files all make use of one of the EXPORT_SYMBOL variants
or the THIS_MODULE macro.  So they will need <linux/export.h>
Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>

Many of the core ARM kernel files are not modules, but just
including module.h for exporting symbols.  Now these files can
use the lighter footprint export.h for this role.

There are probably lots more, but ARM files of mach-* and plat-*
don't get coverage via a simple yesconfig build.  They will have
to be cleaned up and tested via using their respective configs.
Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>

Building these files does not reveal a hidden need for
any of these.  Since module.h brings in the whole kitchen
sink, it just needlessly adds 30k+ lines to the cpp burden.

There are probably lots more, but ARM files of mach-* and plat-*
don't get coverage via a simple yesconfig build.  They will have
to be cleaned up and tested via using their respective configs.
Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>

To fix messages like this:

  CC      arch/arm/plat-samsung/platformdata.o
arch/arm/plat-samsung/platformdata.c: In function 's3c_set_platdata':
arch/arm/plat-samsung/platformdata.c:29: error: 'GFP_KERNEL' undeclared (first use in this function)
arch/arm/plat-samsung/platformdata.c:29: error: (Each undeclared identifier is reported only once
arch/arm/plat-samsung/platformdata.c:29: error: for each function it appears in.)
make[3]: *** [arch/arm/plat-samsung/platformdata.o] Error 1
Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>

To fix this:

arch/arm/mach-bcmring/dma.c: In function 'dma_request_channel_dbg':
arch/arm/mach-bcmring/dma.c:1022: error: 'TASK_INTERRUPTIBLE' undeclared (first use in this function)
arch/arm/mach-bcmring/dma.c:1022: error: (Each undeclared identifier is reported only once
Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>

To get the definition of core_param() they need this header.
Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>

Add the include to fix things like this:

arch/arm/mach-sa1100/jornada720.c:278: error: 'PAGE_SHIFT' undeclared here (not in a function)
arch/arm/mach-bcmring/mm.c:32: error: 'PAGE_SHIFT' undeclared here (not in a function)
arch/arm/mach-sa1100/collie.c:361: error: 'PAGE_SHIFT' undeclared here (not in a function)
Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>

To fix things like this:

arch/arm/mach-omap2/usb-tusb6010.c:58: error: implicit declaration of function 'memset'
arch/arm/kernel/leds.c:40: error: implicit declaration of function 'strcspn'
arch/arm/kernel/leds.c:40: warning: incompatible implicit declaration of built-in function 'strcspn'
arch/arm/kernel/leds.c:45: error: implicit declaration of function 'strncmp'
arch/arm/kernel/leds.c:55: error: implicit declaration of function 'strlen'
arch/arm/kernel/leds.c:55: warning: incompatible implicit declaration of built-in function 'strlen'
arch/arm/mach-omap2/clockdomain.c:52: error: implicit declaration of function 'strcmp'
Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>

It was implicitly getting it via an implicit presence of module.h
but when we clean that up, we'll get a bunch of lines like this:

arch/arm/kernel/ptrace.c:764: error: 'NT_PRSTATUS' undeclared here (not in a function)
arch/arm/kernel/ptrace.c:765: error: 'ELF_NGREG' undeclared here (not in a function)
arch/arm/kernel/ptrace.c:776: error: 'NT_PRFPREG' undeclared here (not in a function)
Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>

None of the files touched here are modules, and they are not
exporting any symbols either -- so there is no need to be including
the module.h.  Builds of all the files remains successful.

Even kernel/module.c does not need to include it, since it includes
linux/moduleloader.h instead.
Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>

All these files were including module.h just for the basic
EXPORT_SYMBOL infrastructure.  We can shift them off to the
export.h header which is a way smaller footprint and thus
realize some compile time gains.
Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>

This file is only exporting symbols and so should use export.h
and not module.h header.  But in doing the conversion, we will
uncover that it was implicitly using errno.h via module.h:

  CC      arch/powerpc/platforms/pseries/hvconsole.o
arch/powerpc/platforms/pseries/hvconsole.c: In function 'hvc_put_chars':
arch/powerpc/platforms/pseries/hvconsole.c:77: error: 'EIO' undeclared (first use in this function)
Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>

Removing the implicit presence of module.h from almost everywhere
will reveal this implicit usage of paca.h and string.h headers as
follows:

arch/powerpc/platforms/pseries/plpar_wrappers.h:22: error: implicit declaration of function 'get_lppaca'
arch/powerpc/platforms/pseries/plpar_wrappers.h:208: error: implicit declaration of function 'memcpy'
Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>

We've been getting the header implicitly via module.h in the past
but when we clean that up, we'll get this failure:

  CC      arch/powerpc/platforms/cell/beat_spu_priv1.o
In file included from arch/powerpc/platforms/cell/beat_spu_priv1.c:22:
arch/powerpc/include/asm/spu.h:190: error: field 'list_mutex' has incomplete type
make[2]: *** [arch/powerpc/platforms/cell/beat_spu_priv1.o] Error 1
Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>

This file only needs export.h to get EXPORT_SYMBOL, but in doing
so, it uncovers an implicit use of linux/cache.h as follows:

 CC      arch/powerpc/kernel/firmware.o
arch/powerpc/kernel/firmware.c:20: error: expected '=', ',', ';', 'asm' or '__attribute__' before '__read_mostly'
arch/powerpc/kernel/firmware.c:21: error: expected '=', ',', ';', 'asm' or '__attribute__' before '__used'
make[2]: *** [arch/powerpc/kernel/firmware.o] Error 1
Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>

We can convert this file to using export.h since it only wants
to export symbols, but when we do we'll see also that it was
implicitly getting notifier.h from module.h via this failure:

  CC      arch/powerpc/platforms/cell/spu_notify.o
arch/powerpc/platforms/cell/spu_notify.c:28: warning: type defaults to 'int' in declaration of 'BLOCKING_NOTIFIER_HEAD'
arch/powerpc/platforms/cell/spu_notify.c:28: warning: parameter names (without types) in function declaration
arch/powerpc/platforms/cell/spu_notify.c: In function 'spu_switch_notify':
arch/powerpc/platforms/cell/spu_notify.c:32: error: implicit declaration of function 'blocking_notifier_call_chain'
arch/powerpc/platforms/cell/spu_notify.c:32: error: 'spu_switch_notifier' undeclared (first use in this function)
Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>

This has been relying on the fact that the parent file would have
module.h (and thus nearly everything) present.  But once we fix that,
we'll get stuck with this failure:

In file included from arch/powerpc/platforms/cell/beat_spu_priv1.c:26:
arch/powerpc/platforms/cell/beat_wrapper.h: In function 'beat_eeprom_write':
arch/powerpc/platforms/cell/beat_wrapper.h:160: error: implicit declaration of function 'memcpy'

and many more instances of the same.  Fix it in advance.
Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>

They are getting it through device.h --> module.h path, but we want
to clean that up.  This is a sample of what will happen if we don't:

  pseries/iommu.c: In function 'tce_build_pSeriesLP':
  pseries/iommu.c:136: error: implicit declaration of function 'show_stack'

  pseries/eeh.c: In function 'eeh_token_to_phys':
  pseries/eeh.c:359: error: 'init_mm' undeclared (first use in this function)

  pseries/eeh_event.c: In function 'eeh_event_handler':
  pseries/eeh_event.c:63: error: implicit declaration of function 'daemonize'
  pseries/eeh_event.c:64: error: implicit declaration of function 'set_current_state'
  pseries/eeh_event.c:64: error: 'TASK_INTERRUPTIBLE' undeclared (first use in this function)
  pseries/eeh_event.c:64: error: (Each undeclared identifier is reported only once
  pseries/eeh_event.c:64: error: for each function it appears in.)
  pseries/eeh_event.c: In function 'eeh_thread_launcher':
  pseries/eeh_event.c:109: error: 'CLONE_KERNEL' undeclared (first use in this function)

  hotplug-cpu.c: In function 'pseries_mach_cpu_die':
  hotplug-cpu.c:115: error: implicit declaration of function 'idle_task_exit'

  kernel/swsusp_64.c: In function 'do_after_copyback':
  kernel/swsusp_64.c:17: error: implicit declaration of function 'touch_softlockup_watchdog'

  cell/spufs/context.c: In function 'alloc_spu_context':
  cell/spufs/context.c:60: error: implicit declaration of function 'get_task_mm'
  cell/spufs/context.c:60: warning: assignment makes pointer from integer without a cast
  cell/spufs/context.c: In function 'spu_forget':
  cell/spufs/context.c:127: error: implicit declaration of function 'mmput'

  pasemi/dma_lib.c: In function 'pasemi_dma_stop_chan':
  pasemi/dma_lib.c:332: error: implicit declaration of function 'cond_resched'

  sysdev/fsl_lbc.c: In function 'fsl_lbc_ctrl_irq':
  sysdev/fsl_lbc.c:247: error: 'TASK_NORMAL' undeclared (first use in this function)

Add in sched.h so these get the definitions they are looking for.
Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>

They get it via module.h (via device.h) but we want to clean that up.
When we do, we'll get things like:

ibmebus.c:314: error: 'S_IWUSR' undeclared here (not in a function)
vio.c:972: error: 'S_IWUSR' undeclared here (not in a function)

so add in the stat header it is using explicitly in advance.
Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>

So that we can clean up the header files and not be relying
on implicit includes from device.h ---> module.h
Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>

Fix failures in powerpc associated with the previously allowed
implicit module.h presence that now lead to things like this:

arch/powerpc/mm/mmu_context_hash32.c:76:1: error: type defaults to 'int' in declaration of 'EXPORT_SYMBOL_GPL'
arch/powerpc/mm/tlb_hash32.c:48:1: error: type defaults to 'int' in declaration of 'EXPORT_SYMBOL'
arch/powerpc/kernel/pci_32.c:51:1: error: type defaults to 'int' in declaration of 'EXPORT_SYMBOL_GPL'
arch/powerpc/kernel/iomap.c:36:1: error: type defaults to 'int' in declaration of 'EXPORT_SYMBOL'
arch/powerpc/platforms/44x/canyonlands.c:126:1: error: type defaults to 'int' in declaration of 'EXPORT_SYMBOL'
arch/powerpc/kvm/44x.c:168:59: error: 'THIS_MODULE' undeclared (first use in this function)

[with several contibutions from Stephen Rothwell <sfr@canb.auug.org.au>]
Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>

With module.h being implicitly everywhere via device.h, the absence
of explicitly including something for EXPORT_SYMBOL went unnoticed.
Since we are heading to fix things up and clean module.h from the
device.h file, we need to explicitly include these files now.
Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>

It was coming in via device.h --> module.h etc. but we want to
clean that up.  So explicitly include the header where init_mm
is being declared.
Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>

We want to clean up the chain of includes stumbling through
module.h, and when we do that, we'll see:

  CC      arch/x86/platform/efi/efi_32.o
  efi/efi_32.c: In function ‘efi_call_phys_prelog’:
  efi/efi_32.c:80: error: implicit declaration of function ‘get_cpu_gdt_table’
  efi/efi_32.c:82: error: implicit declaration of function ‘load_gdt’
  make[4]: *** [arch/x86/platform/efi/efi_32.o] Error 1

Include asm/desc.h so that there are no implicit include assumptions.
Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>

These files aren't just exporting symbols -- they are also defining
a MODULE_LICENSE etc. so give them the full module.h file.
Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>

These files were implicitly getting EXPORT_SYMBOL via device.h
which was including module.h, but that will be fixed up shortly.

By fixing these now, we can avoid seeing things like:

arch/x86/kernel/rtc.c:29: warning: type defaults to ‘int’ in declaration of ‘EXPORT_SYMBOL’
arch/x86/kernel/pci-dma.c:20: warning: type defaults to ‘int’ in declaration of ‘EXPORT_SYMBOL’
arch/x86/kernel/e820.c:69: warning: type defaults to ‘int’ in declaration of ‘EXPORT_SYMBOL_GPL’

[ with input from Randy Dunlap <rdunlap@xenotime.net> and also
  from Stephen Rothwell <sfr@canb.auug.org.au> ]
Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>

In removing the presence of <linux/module.h> from some of the
more common <linux/something.h> files, this implict include
of <linux/topology.h> was uncovered.

  CC      arch/x86/kernel/vsyscall_64.o
  arch/x86/kernel/vsyscall_64.c: In function ‘vsyscall_set_cpu’:
  arch/x86/kernel/vsyscall_64.c:259: error: implicit declaration of function ‘cpu_to_node’

Explicitly call it out so the cleanup can take place.
Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>

AMD processors apparently have a bug in the hardware task switching
support when NPT is enabled. If the task switch triggers a NPF, we can
get wrong EXITINTINFO along with that fault. On resume, spurious
exceptions may then be injected into the guest.

We were able to reproduce this bug when our guest triggered #SS and the
handler were supposed to run over a separate task with not yet touched
stack pages.

Work around the issue by continuing to emulate task switches even in
NPT mode.
Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>

Implement sigp external call, which might be required for guests that
issue an external call instead of an emergency signal for IPI.

This fixes an issue with "KVM: unknown SIGP: 0x02" when booting
such an SMP guest.
Signed-off-by: NChristian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>

KVM common code does vcpu_load prior to calling our arch ioctls and
vcpu_put after we're done here. Via the kvm_arch_vcpu_load/put
callbacks we do load the fpu and access register state into the
processor, which saves us moving the state on every SIE exit the
kernel handles. However this breaks register setting from userspace,
because of the following sequence:
1a. vcpu load stores userspace register content
1b. vcpu load loads guest register content
2.  kvm_arch_vcpu_ioctl_set_fpu/sregs updates saved guest register content
3a. vcpu put stores the guest registers and overwrites the new content
3b. vcpu put loads the userspace register set again

This patch loads the new guest register state into the cpu, so that the correct
(new) set of guest registers will be stored in step 3a.
Signed-off-by: NCarsten Otte <cotte@de.ibm.com>
Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>

This patch fixes the return value of kvm_arch_init_vm in case a memory
allocation goes wrong.
Signed-off-by: NCarsten Otte <cotte@de.ibm.com>
Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>

We use the cpu id provided by userspace as array index here. Thus we
clearly need to check it first. Ooops.

CC: <stable@vger.kernel.org>
Signed-off-by: NCarsten Otte <cotte@de.ibm.com>
Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>

It is generally a better idea to make intentionally empty files
contain the human-readable /* empty */ comment, also it makes
the files play nice with "make distclean".
Reported-by: NJeff Garzik <jeff@garzik.org>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
Acked-by: NJeff Garzik <jeff@garzik.org>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>