9 years ago[S390] topology: change default
Heiko Carstens [Mon, 25 Oct 2010 14:10:43 +0000]
[S390] topology: change default

Switch default value of the kernel parameter 'topology' from off to on.
Various performance measurements have finally shown that there are no
(known) regressions anywhere.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

9 years ago[S390] smp: use correct cpu address in print_cpu_info()
Heiko Carstens [Mon, 25 Oct 2010 14:10:42 +0000]
[S390] smp: use correct cpu address in print_cpu_info()

Up to now print_cpu_info() uses the cpu address stored in it's local
lowcore to print a message to the console. The cpu address in the
lowcore is (in this case) however not the physical cpu address of the
local cpu. It's the address of the cpu that issued the sigp restart
which started the local cpu.
Fix this by using the store cpu address instruction instead.
It's not that anybody really cares since this is broken since more than
ten years...

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

9 years ago[S390] remove ieee_instruction_pointer from thread_struct
Martin Schwidefsky [Mon, 25 Oct 2010 14:10:41 +0000]
[S390] remove ieee_instruction_pointer from thread_struct

The ieee_instruction_pointer can not be read from user space anymore
since git commit 613e1def6b52c399a8b72a5e11bc2e57d2546fb8, the ptrace
interface always returns zero. Remove it from the thread_struct. It
is still present in the user_regs_struct for compatability reasons.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

9 years ago[S390] cleanup system call parameter setup
Martin Schwidefsky [Mon, 25 Oct 2010 14:10:40 +0000]
[S390] cleanup system call parameter setup

Do the setup of the stack overflow argument for the sixth system
call parameter right before the branch to the system call function.
That simplifies the system call parameter access code.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

9 years ago[S390] correct alignment of cpuid structure
Martin Schwidefsky [Mon, 25 Oct 2010 14:10:39 +0000]
[S390] correct alignment of cpuid structure

The store-cpu-id instruction has a minimum alignment of 8. Reflect
that in the definition of struct cpuid.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

9 years ago[S390] cleanup lowcore access from external interrupts
Martin Schwidefsky [Mon, 25 Oct 2010 14:10:38 +0000]
[S390] cleanup lowcore access from external interrupts

Read external interrupts parameters from the lowcore in the first
level interrupt handler in entry[64].S.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

9 years ago[S390] cleanup lowcore access from program checks
Martin Schwidefsky [Mon, 25 Oct 2010 14:10:37 +0000]
[S390] cleanup lowcore access from program checks

Read all required fields for program checks from the lowcore in the
first level interrupt handler in entry[64].S. If the context that
caused the fault was enabled for interrupts we can now re-enable the
irqs in entry[64].S.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

9 years ago[S390] pgtable: move pte_mkhuge() from hugetlb.h to pgtable.h
Heiko Carstens [Mon, 25 Oct 2010 14:10:36 +0000]
[S390] pgtable: move pte_mkhuge() from hugetlb.h to pgtable.h

All architectures besides s390 have pte_mkhuge() defined in pgtable.h.
So move the function to pgtable.h on s390 as well.
Fixes a compile error introduced with "hugetlb: hugepage migration core"
in linux-next which only happens on s390.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

9 years ago[S390] fix SIGBUS handling
Martin Schwidefsky [Mon, 25 Oct 2010 14:10:35 +0000]
[S390] fix SIGBUS handling

Raise SIGBUS with a siginfo structure. Deliver BUS_ADRERR as si_code and
the address of the fault in the si_addr field.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

9 years ago[S390] cio: notify drivers of channel path events
Sebastian Ott [Mon, 25 Oct 2010 14:10:34 +0000]
[S390] cio: notify drivers of channel path events

This patch adds a notification mechanism to inform ccw drivers
about changes to channel paths, which occured while the device
is online.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

9 years ago[S390] css: update subchannel description after hibernate
Sebastian Ott [Mon, 25 Oct 2010 14:10:33 +0000]
[S390] css: update subchannel description after hibernate

Update the subchannel descriptor while resuming from hibernate
in order to obtain current link addresses.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

9 years ago[S390] css: update descriptor after hibernate
Sebastian Ott [Mon, 25 Oct 2010 14:10:32 +0000]
[S390] css: update descriptor after hibernate

Update the channel path descriptors after hibernation.
This is done unlocked, since we are the only active
task at this time.

Note: chsc_determine_base_channel_path_desc is changed
to use spin_lock_irqsave, since it's called with
interrupts disabled in this case.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

9 years ago[S390] cio: update descriptor in chsc_chp_vary
Sebastian Ott [Mon, 25 Oct 2010 14:10:31 +0000]
[S390] cio: update descriptor in chsc_chp_vary

Update the channel path descriptor at the beginning of to the
vary_on operation.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

9 years ago[S390] chsc: use the global page to determine the chp desriptor
Sebastian Ott [Mon, 25 Oct 2010 14:10:30 +0000]
[S390] chsc: use the global page to determine the chp desriptor

chsc_determine_channel_path_desc is called by a wrapper
who allocates a response struct. The response data
is then memcpy'ed to this response struct by
chsc_determine_channel_path_desc.

Change chsc_determine_base_channel_path_desc to use the
global chsc_page and deliver it to the function doing
the actual chsc call. The channel path desriptor is
then directly read from the response data.

As a result we get rid of the additional allocation
for the response struct.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

9 years ago[S390] chsc: consolidate memory allocations
Sebastian Ott [Mon, 25 Oct 2010 14:10:29 +0000]
[S390] chsc: consolidate memory allocations

Most wrappers around the channel subsystem call have their own logic
to allocate memory (with proper alignment) or use preallocated or
static memory. This patch converts most users of the channel
subsystem call to use the same preallocated page (proteced by a
spinlock).

Note: The sei_page which is used in our crw handler to call
"store event information" has to coexist, since
a) in crw context, while accessing the sei_page, sleeping is allowed
   (which will conflict with the spinlock protection of the chsc_page)
b) in crw context, while accessing the sei_page, channel subsystem
   calls are allowed (which itself would require the page).

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

9 years ago[S390] chsc: initialization fixes
Sebastian Ott [Mon, 25 Oct 2010 14:10:28 +0000]
[S390] chsc: initialization fixes

This patch fixes:
 * kfree vs. free_page usage
 * structure definition for determine_css_characteristics
 * naming convention for the chsc init function
 * deregistration of crw handlers in the cleanup path

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

9 years ago[S390] cio: add lock to struct channel_path
Sebastian Ott [Mon, 25 Oct 2010 14:10:27 +0000]
[S390] cio: add lock to struct channel_path

Serialize access to members of struct channel_path with a mutex.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

9 years ago[S390] cio: fix memleak in resume path
Sebastian Ott [Mon, 25 Oct 2010 14:10:26 +0000]
[S390] cio: fix memleak in resume path

If a ccwdevice is lost during hibernation and a different
ccwdevice is attached to the same subchannel, we will
deregister the old ccw device and register the new one.

Since deregistration is not allowed in this context, we
handle this action later. However, some parts of the
registration process for the new device were started anyway,
so that the old device structure is no longer accessible.

Fix this by deferring both actions to the afterwards
scheduled subchannel event.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

9 years ago[S390] cio: remove custom implementation of hex_to_bin()
Andy Shevchenko [Mon, 25 Oct 2010 14:10:25 +0000]
[S390] cio: remove custom implementation of hex_to_bin()

Signed-off-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

9 years ago[S390] dasd fix dump_sense_dbf
Stefan Haberland [Mon, 25 Oct 2010 14:10:24 +0000]
[S390] dasd fix dump_sense_dbf

The dasd_eckd_dump_sense_dbf function uses a macro for s390 debug
feature that can handle up to 8 parameters (for the DASD device
driver).
Fix the function to use only the maximum number of parameters.

Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

9 years ago[S390] css: fix sparse warning
Sebastian Ott [Mon, 25 Oct 2010 14:10:23 +0000]
[S390] css: fix sparse warning

fix this sparse warning:

drivers/s390/cio/css.c:580:6: warning: symbol 'css_schedule_eval_all_unreg'
was not declared. Should it be static?

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

9 years ago[S390] hvc_iucv: do not call iucv_unregister if iucv_register failed
Hendrik Brueckner [Mon, 25 Oct 2010 14:10:22 +0000]
[S390] hvc_iucv: do not call iucv_unregister if iucv_register failed

If the iucv_register() functions fails, the error recovery calls
iucv_unregister() which might cause the following stack backtrace:

(<0000000000100ab2> show_trace+0xee/0x144)
<00000000004f1842> panic+0xb6/0x248
<00000000001010a6> die+0x15a/0x16c
<000000000011d936> do_no_context+0xa6/0xe4
<00000000004f84dc> do_protection_exception+0x2e8/0x3a4
<0000000000113afc> pgm_exit+0x0/0x14
<00000000004e786e> iucv_unregister+0x5a/0x17c
(<00000000004e785e> iucv_unregister+0x4a/0x17c)
<000000000076de74> hvc_iucv_init+0x228/0x5dc
<00000000001000c2> do_one_initcall+0x3e/0x19c
<00000000007524a2> kernel_init+0x28e/0x404
<0000000000105dd6> kernel_thread_starter+0x6/0xc
<0000000000105dd0> kernel_thread_starter+0x0/0xc

Remove the call to iucv_unregister() and remove the goto label
as unregistering is the last step in the hvc_iucv initialization.
If iucv_register() fails, simply clean up hvc terminals and free
resources.

Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

9 years ago[S390] cmm: fix crash on case conversion
Heiko Carstens [Mon, 25 Oct 2010 14:10:21 +0000]
[S390] cmm: fix crash on case conversion

When the cmm module is compiled into the kernel it will crash when
writing to the R/O data section.
Reason is the lower to upper case conversion of the "sender" module
parameter which ignored the fact that the pointer is preinitialized.

Introduced with 41b42876 "cmm, smsgiucv_app: convert sender to
uppercase"

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

9 years ago[S390] drivers/s390/char: Use static const char arrays
Joe Perches [Mon, 25 Oct 2010 14:10:20 +0000]
[S390] drivers/s390/char: Use static const char arrays

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

9 years ago[S390] switch_to: get rid of prev == next check
Heiko Carstens [Mon, 25 Oct 2010 14:10:19 +0000]
[S390] switch_to: get rid of prev == next check

schedule() makes sure that prev != next before calling switch_to().
Therefore remove the redundant check.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

9 years ago[S390] switch_to: dont restore/save access & fpu regs for kernel threads
Heiko Carstens [Mon, 25 Oct 2010 14:10:18 +0000]
[S390] switch_to: dont restore/save access & fpu regs for kernel threads

If the previous task was a kernel thread there is no need to save the
contents of the fpu and access registers since they aren't used in
kernel mode.
For the same reason it is not necessary to restore these registers if
the next task is a kernel thread.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

9 years ago[S390] Add config option for z196 code generation.
Heiko Carstens [Mon, 25 Oct 2010 14:10:17 +0000]
[S390] Add config option for z196 code generation.

Add a kernel config option for the IBM zEnterprise 196. This will
produce faster code on newer compilers using the -march=z196 option.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

9 years ago[S390] sysinfo: display capacity adjustment indicator
Heiko Carstens [Mon, 25 Oct 2010 14:10:16 +0000]
[S390] sysinfo: display capacity adjustment indicator

Display machine capacity adjustment indicator and capacity
change reason if available in /proc/sysinfo.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

9 years ago[S390] add z196 instructions to kernel disassembler
Martin Schwidefsky [Mon, 25 Oct 2010 14:10:15 +0000]
[S390] add z196 instructions to kernel disassembler

Add the new instructions introduced with z196 to the kernel disassembler.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

9 years ago[S390] add support for nonquiescing sske
Martin Schwidefsky [Mon, 25 Oct 2010 14:10:14 +0000]
[S390] add support for nonquiescing sske

Improve performance of the sske operation by using the nonquiescing
variant if the affected page has no mappings established. On machines
with no support for the new sske variant the mask bit will be ignored.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

9 years ago[S390] store indication fault optimization
Martin Schwidefsky [Mon, 25 Oct 2010 14:10:13 +0000]
[S390] store indication fault optimization

Use the store indication bit in the translation exception code on
page faults to avoid the protection faults that immediatly follow
the page fault if the access has been a write.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

9 years ago[S390] cpu hotplug/idle: move cpu_die call to enabled context
Heiko Carstens [Mon, 25 Oct 2010 14:10:12 +0000]
[S390] cpu hotplug/idle: move cpu_die call to enabled context

There is no difference if cpu_die is called from enabled or disabled
context. Except that the fast_gup code might be called via
cpu_die -> idle_task_exit -> __mm_drop -> crst_table_free. Which in
turn grabs and releases a spinlock using the _bh ops, which is not
allowed in irq disabled context, since spin_unlock_bh will
unconditionally enable interrupts again.
To get rid of the warning emitted by the softirq code just move the
code to enabled context.

In this case this doesn't fix a bug, we just get rid of a warning.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

9 years ago[S390] lockless get_user_pages_fast()
Martin Schwidefsky [Mon, 25 Oct 2010 14:10:11 +0000]
[S390] lockless get_user_pages_fast()

Implement get_user_pages_fast without locking in the fastpath on s390.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

9 years ago[S390] set ARCH_HAS_SG_CHAIN for s390
Christof Schmitt [Mon, 25 Oct 2010 14:10:10 +0000]
[S390] set ARCH_HAS_SG_CHAIN for s390

Set ARCH_HAS_SG_CHAIN for scatter lists on s390. Without this flag the
SCSI code limits the maximum number of segments, so set it to make
proper use of the FCP channel hardware.

Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

9 years ago[S390] standardize Kbuild rules
Heiko Carstens [Mon, 25 Oct 2010 14:10:09 +0000]
[S390] standardize Kbuild rules

Introducing this Kbuild file allow us to:

make arch/s390/

And thus building all the core part of s390.
Same as on other architectures.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

9 years ago[S390] dasd: let recovery cqr inherit flags from failed cqr
Stefan Weinhuber [Mon, 25 Oct 2010 14:10:08 +0000]
[S390] dasd: let recovery cqr inherit flags from failed cqr

The usual way to recover a failed DASD ECKD request (cqr) is to create
a new request with an appropriate recovery CCW program.  Certain
features, e.g. failfast, can be enabled per request and are stored in
the requests flags. These flags have to be copied from the failed to
the recovery request, to let the recovery request use the same
features as the original one.

Signed-off-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

9 years ago[S390] zero page cache synonyms
Martin Schwidefsky [Mon, 25 Oct 2010 14:10:07 +0000]
[S390] zero page cache synonyms

If the zero page is mapped to virtual user space addresses that differ
only in bit 2^12 or 2^13 we get L1 cache synonyms which can affect
performance. Follow the mips model and use multiple zero pages to avoid
the synonyms.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

9 years agoMerge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
Linus Torvalds [Sun, 24 Oct 2010 20:41:39 +0000]
Merge branch 'for-next' of git://git./linux/kernel/git/jikos/trivial

* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (39 commits)
  Update broken web addresses in arch directory.
  Update broken web addresses in the kernel.
  Revert "drivers/usb: Remove unnecessary return's from void functions" for musb gadget
  Revert "Fix typo: configuation => configuration" partially
  ida: document IDA_BITMAP_LONGS calculation
  ext2: fix a typo on comment in ext2/inode.c
  drivers/scsi: Remove unnecessary casts of private_data
  drivers/s390: Remove unnecessary casts of private_data
  net/sunrpc/rpc_pipe.c: Remove unnecessary casts of private_data
  drivers/infiniband: Remove unnecessary casts of private_data
  drivers/gpu/drm: Remove unnecessary casts of private_data
  kernel/pm_qos_params.c: Remove unnecessary casts of private_data
  fs/ecryptfs: Remove unnecessary casts of private_data
  fs/seq_file.c: Remove unnecessary casts of private_data
  arm: uengine.c: remove C99 comments
  arm: scoop.c: remove C99 comments
  Fix typo configue => configure in comments
  Fix typo: configuation => configuration
  Fix typo interrest[ing|ed] => interest[ing|ed]
  Fix various typos of valid in comments
  ...

Fix up trivial conflicts in:
drivers/char/ipmi/ipmi_si_intf.c
drivers/usb/gadget/rndis.c
net/irda/irnet/irnet_ppp.c

9 years agoMerge branch 'devel' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/edac
Linus Torvalds [Sun, 24 Oct 2010 20:06:57 +0000]
Merge branch 'devel' of git://git./linux/kernel/git/mchehab/edac

* 'devel' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/edac: (25 commits)
  i7300_edac: Properly initialize per-csrow memory size
  V4L/DVB: i7300_edac: better initialize page counts
  MAINTAINERS: Add maintainer for i7300-edac driver
  i7300-edac: CodingStyle cleanup
  i7300_edac: Improve comments
  i7300_edac: Cleanup: reorganize the file contents
  i7300_edac: Properly detect channel on CE errors
  i7300_edac: enrich FBD error info for corrected errors
  i7300_edac: enrich FBD error info for fatal errors
  i7300_edac: pre-allocate a buffer used to prepare err messages
  i7300_edac: Fix MTR x4/x8 detection logic
  i7300_edac: Make the debug messages coherent with the others
  i7300_edac: Cleanup: remove get_error_info logic
  i7300_edac: Add a code to cleanup error registers
  i7300_edac: Add support for reporting FBD errors
  i7300_edac: Properly detect the type of error correction
  i7300_edac: Detect if the device is on single mode
  i7300_edac: Adds detection for enhanced scrub mode on x8
  i7300_edac: Clear the error bit after reading
  i7300_edac: Add error detection code for global errors
  ...

9 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg...
Linus Torvalds [Sun, 24 Oct 2010 19:47:55 +0000]
Merge branch 'for-linus' of git://git./linux/kernel/git/penberg/slab-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/slab-2.6: (27 commits)
  SLUB: Fix memory hotplug with !NUMA
  slub: Move functions to reduce #ifdefs
  slub: Enable sysfs support for !CONFIG_SLUB_DEBUG
  SLUB: Optimize slab_free() debug check
  slub: Move NUMA-related functions under CONFIG_NUMA
  slub: Add lock release annotation
  slub: Fix signedness warnings
  slub: extract common code to remove objects from partial list without locking
  SLUB: Pass active and inactive redzone flags instead of boolean to debug functions
  slub: reduce differences between SMP and NUMA
  Revert "Slub: UP bandaid"
  percpu: clear memory allocated with the km allocator
  percpu: use percpu allocator on UP too
  percpu: reduce PCPU_MIN_UNIT_SIZE to 32k
  vmalloc: pcpu_get/free_vm_areas() aren't needed on UP
  SLUB: Fix merged slab cache names
  Slub: UP bandaid
  slub: fix SLUB_RESILIENCY_TEST for dynamic kmalloc caches
  slub: Fix up missing kmalloc_cache -> kmem_cache_node case for memoryhotplug
  slub: Add dummy functions for the !SLUB_DEBUG case
  ...

9 years agoMerge branch 'kvm-updates/2.6.37' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Linus Torvalds [Sun, 24 Oct 2010 19:47:25 +0000]
Merge branch 'kvm-updates/2.6.37' of git://git./virt/kvm/kvm

* 'kvm-updates/2.6.37' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (321 commits)
  KVM: Drop CONFIG_DMAR dependency around kvm_iommu_map_pages
  KVM: Fix signature of kvm_iommu_map_pages stub
  KVM: MCE: Send SRAR SIGBUS directly
  KVM: MCE: Add MCG_SER_P into KVM_MCE_CAP_SUPPORTED
  KVM: fix typo in copyright notice
  KVM: Disable interrupts around get_kernel_ns()
  KVM: MMU: Avoid sign extension in mmu_alloc_direct_roots() pae root address
  KVM: MMU: move access code parsing to FNAME(walk_addr) function
  KVM: MMU: audit: check whether have unsync sps after root sync
  KVM: MMU: audit: introduce audit_printk to cleanup audit code
  KVM: MMU: audit: unregister audit tracepoints before module unloaded
  KVM: MMU: audit: fix vcpu's spte walking
  KVM: MMU: set access bit for direct mapping
  KVM: MMU: cleanup for error mask set while walk guest page table
  KVM: MMU: update 'root_hpa' out of loop in PAE shadow path
  KVM: x86 emulator: Eliminate compilation warning in x86_decode_insn()
  KVM: x86: Fix constant type in kvm_get_time_scale
  KVM: VMX: Add AX to list of registers clobbered by guest switch
  KVM guest: Move a printk that's using the clock before it's ready
  KVM: x86: TSC catchup mode
  ...

9 years agoMerge branch 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvar...
Linus Torvalds [Sun, 24 Oct 2010 19:46:24 +0000]
Merge branch 'i2c-for-linus' of git://git./linux/kernel/git/jdelvare/staging

* 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging:
  i2c-viapro: Don't log nacks
  i2c/pca954x: Remove __devinit and __devexit from probe and remove functions
  MAINTAINERS: Add maintainer for PCA9541 I2C bus master selector driver
  i2c/mux: Driver for PCA9541 I2C Master Selector
  i2c: Optimize function i2c_detect()
  i2c: Discard warning message on device instantiation from user-space
  i2c-amd8111: Add proper error handling
  i2c: Change to new flag variable
  i2c: Remove unneeded inclusions of <linux/i2c-id.h>
  i2c: Let i2c_parent_is_i2c_adapter return the parent adapter
  i2c: Simplify i2c_parent_is_i2c_adapter
  i2c-pca-platform: Change device name of request_irq
  i2c: Fix Kconfig dependencies

9 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid
Linus Torvalds [Sun, 24 Oct 2010 19:44:59 +0000]
Merge branch 'for-linus' of git://git./linux/kernel/git/jikos/hid

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid: (47 commits)
  HID: fix mismerge in hid-lg
  HID: hidraw: fix window in hidraw_release
  HID: hid-sony: override usbhid_output_raw_report for Sixaxis
  HID: add absolute axis resolution calculation
  HID: force feedback support for Logitech RumblePad gamepad
  HID: support STmicroelectronics and Sitronix with hid-stantuml driver
  HID: magicmouse: Adjust major / minor axes to scale
  HID: Fix for problems with eGalax/DWAV multi-touch-screen
  HID: waltop: add support for Waltop Slim Tablet 12.1 inch
  HID: add NOGET quirk for AXIS 295 Video Surveillance Joystick
  HID: usbhid: remove unused hiddev_driver
  HID: magicmouse: Use hid-input parsing rather than bypassing it
  HID: trivial formatting fix
  HID: Add support for Logitech Speed Force Wireless gaming wheel
  HID: don't Send Feature Reports on Interrupt Endpoint
  HID: 3m: Adjust major / minor axes to scale
  HID: 3m: Correct touchscreen emulation
  HID: 3m: Convert to MT slots
  HID: 3m: Output proper orientation range
  HID: 3m: Adjust to sequential MT HID protocol
  ...

9 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Linus Torvalds [Sun, 24 Oct 2010 19:44:34 +0000]
Merge git://git./linux/kernel/git/herbert/crypto-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  crypto: Makefile - replace the use of <module>-objs with <module>-y
  crypto: hifn_795x - use cancel_delayed_work_sync()
  crypto: talitos - sparse check endian fixes
  crypto: talitos - fix checkpatch warning
  crypto: talitos - fix warning: 'alg' may be used uninitialized in this function
  crypto: cryptd - Adding the AEAD interface type support to cryptd
  crypto: n2_crypto - Niagara2 driver needs to depend upon CRYPTO_DES
  crypto: Kconfig - update broken web addresses
  crypto: omap-sham - Adjust DMA parameters
  crypto: fips - FIPS requires algorithm self-tests
  crypto: omap-aes - OMAP2/3 AES hw accelerator driver
  crypto: updates to enable omap aes
  padata: add missing __percpu markup in include/linux/padata.h
  MAINTAINERS: Add maintainer entries for padata/pcrypt

9 years agoMerge branch 'master' into for-linus
Pekka Enberg [Sun, 24 Oct 2010 16:57:05 +0000]
Merge branch 'master' into for-linus

Conflicts:
include/linux/percpu.h
mm/percpu.c

9 years agoi2c-viapro: Don't log nacks
Jean Delvare [Sun, 24 Oct 2010 16:16:59 +0000]
i2c-viapro: Don't log nacks

Transactions not acked can happen every now and then, in particular
during device detection, and various transaction types can be used for
this purpose. So stop logging this event, except when debugging is
enabled. This is what other similar drivers (e.g. i2c-i801 or
i2c-piix4) do.

Signed-off-by: Jean Delvare <khali@linux-fr.org>

9 years agoi2c/pca954x: Remove __devinit and __devexit from probe and remove functions
Guenter Roeck [Sun, 24 Oct 2010 16:16:59 +0000]
i2c/pca954x: Remove __devinit and __devexit from probe and remove functions

The underlying I2C adapter may or may not be present when this driver
gets initialized, and may disappear later, so there is no safe time at
which the probe and remove functions can be discarded.

Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>

9 years agoMAINTAINERS: Add maintainer for PCA9541 I2C bus master selector driver
Guenter Roeck [Sun, 24 Oct 2010 16:16:59 +0000]
MAINTAINERS: Add maintainer for PCA9541 I2C bus master selector driver

Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>

9 years agoi2c/mux: Driver for PCA9541 I2C Master Selector
Guenter Roeck [Sun, 24 Oct 2010 16:16:58 +0000]
i2c/mux: Driver for PCA9541 I2C Master Selector

This patch adds support for PCA9541, an I2C Bus Master Selector.
The driver is modeled as single channel I2C Multiplexer to be able to utilize
the I2C multiplexer framework.

Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
Reviewed-by: Tom Grennan <tom.grennan@ericsson.com>
Acked-by: Jean Delvare <khali@linux-fr.org>

9 years agoi2c: Optimize function i2c_detect()
Jean Delvare [Sun, 24 Oct 2010 16:16:58 +0000]
i2c: Optimize function i2c_detect()

Check the class flags before allocating the temporary i2c_client
structure, to avoid allocating it when we don't need it.

Also optimize the inner loop a bit.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>

9 years agoi2c: Discard warning message on device instantiation from user-space
Jean Delvare [Sun, 24 Oct 2010 16:16:58 +0000]
i2c: Discard warning message on device instantiation from user-space

The "new_device" sysfs interface has been there for quite some time
now, nobody complained about it so it must be good enough. Time to
remove the warning and call it stable.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Michael Lawnick <ml.lawnick@gmx.de>

9 years agoi2c-amd8111: Add proper error handling
Julia Lawall [Sun, 24 Oct 2010 16:16:58 +0000]
i2c-amd8111: Add proper error handling

The functions the functions amd_ec_wait_write and amd_ec_wait_read have an
unsigned return type, but return a negative constant to indicate an error
condition.

A sematic match that finds this problem is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@exists@
identifier f;
constant C;
@@

 unsigned f(...)
 { <+...
*  return -C;
 ...+> }
// </smpl>

Fixing amd_ec_wait_write and amd_ec_wait_read leads to the need to adjust
the return type of the functions amd_ec_write and amd_ec_read, which are
the only functions that call amd_ec_wait_write and amd_ec_wait_read.
amd_ec_write and amd_ec_read, in turn, are only called from within the
function amd8111_access, which already returns a signed typed value.  Each
of the calls to amd_ec_write and amd_ec_read are updated using the
following semantic patch:

// <smpl>
@@
@@

+ status = amd_ec_write
- amd_ec_write
  (...);
+ if (status) return status;

@@
@@

+ status = amd_ec_read
- amd_ec_read
  (...);
+ if (status) return status;
// </smpl>

The patch also adds the declaration of the status variable.

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Jean Delvare <khali@linux-fr.org>

9 years agoi2c: Change to new flag variable
matt mooney [Sun, 24 Oct 2010 16:16:58 +0000]
i2c: Change to new flag variable

Replace EXTRA_CFLAGS with ccflags-y.

Signed-off-by: matt mooney <mfm@muteddisk.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>

9 years agoi2c: Remove unneeded inclusions of <linux/i2c-id.h>
Jean Delvare [Sun, 24 Oct 2010 16:16:58 +0000]
i2c: Remove unneeded inclusions of <linux/i2c-id.h>

These drivers don't use anything which is defined in <linux/i2c-id.h>.
This header file was never meant to be included directly anyway, and
will be deleted soon.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Ben Dooks <ben-linux@fluff.org>
Acked-by: Dave Airlie <airlied@linux.ie>
Cc: Hans Verkuil <hverkuil@xs4all.nl>

9 years agoi2c: Let i2c_parent_is_i2c_adapter return the parent adapter
Jean Delvare [Sun, 24 Oct 2010 16:16:57 +0000]
i2c: Let i2c_parent_is_i2c_adapter return the parent adapter

This makes the calling site's code clearer IMHO.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Michael Lawnick <ml.lawnick@gmx.de>

9 years agoi2c: Simplify i2c_parent_is_i2c_adapter
Jean Delvare [Sun, 24 Oct 2010 16:16:57 +0000]
i2c: Simplify i2c_parent_is_i2c_adapter

Only i2c devices can have their type set to i2c_adapter_type, so
testing the bus type is redundant.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Michael Lawnick <ml.lawnick@gmx.de>

9 years agoi2c-pca-platform: Change device name of request_irq
Nobuhiro Iwamatsu [Sun, 24 Oct 2010 16:16:57 +0000]
i2c-pca-platform: Change device name of request_irq

i2c->adap.name shouldn't be used in request_irq.
Instead the driver name "i2c-pca-platform" should be used.

Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
Cc: stable@kernel.org
Signed-off-by: Jean Delvare <khali@linux-fr.org>

9 years agoi2c: Fix Kconfig dependencies
Jean Delvare [Sun, 24 Oct 2010 16:16:57 +0000]
i2c: Fix Kconfig dependencies

drivers/i2c/algos/Kconfig makes all the algorithms dependent on
!I2C_HELPER_AUTO, which triggers a Kconfig warning about broken
dependencies when some driver selects one of the algorithms. Ideally
we would make only the prompts dependent on !I2C_HELPER_AUTO, however
Kconfig doesn't currently support that. So we have to redefine the
symbols separately for the I2C_HELPER_AUTO=y case.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Michal Marek <mmarek@suse.cz>

9 years agoKVM: Drop CONFIG_DMAR dependency around kvm_iommu_map_pages
Jan Kiszka [Mon, 18 Oct 2010 13:38:40 +0000]
KVM: Drop CONFIG_DMAR dependency around kvm_iommu_map_pages

We also have to call kvm_iommu_map_pages for CONFIG_AMD_IOMMU. So drop
the dependency on Intel IOMMU, kvm_iommu_map_pages will be a nop anyway
if CONFIG_IOMMU_API is not defined.

KVM-Stable-Tag.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

9 years agoKVM: Fix signature of kvm_iommu_map_pages stub
Jan Kiszka [Thu, 14 Oct 2010 11:59:04 +0000]
KVM: Fix signature of kvm_iommu_map_pages stub

Breaks otherwise if CONFIG_IOMMU_API is not set.

KVM-Stable-Tag.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

9 years agoKVM: MCE: Send SRAR SIGBUS directly
Huang Ying [Fri, 8 Oct 2010 08:24:15 +0000]
KVM: MCE: Send SRAR SIGBUS directly

Originally, SRAR SIGBUS is sent to QEMU-KVM via touching the poisoned
page. But commit 96054569190bdec375fe824e48ca1f4e3b53dd36 prevents the
signal from being sent. So now the signal is sent via
force_sig_info_fault directly.

[marcelo: use send_sig_info instead]

Reported-by: Dean Nelson <dnelson@redhat.com>
Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

9 years agoKVM: MCE: Add MCG_SER_P into KVM_MCE_CAP_SUPPORTED
Huang Ying [Fri, 8 Oct 2010 08:24:14 +0000]
KVM: MCE: Add MCG_SER_P into KVM_MCE_CAP_SUPPORTED

Now we have MCG_SER_P (and corresponding SRAO/SRAR MCE) support in
kernel and QEMU-KVM, the MCG_SER_P should be added into
KVM_MCE_CAP_SUPPORTED to make all these code really works.

Reported-by: Dean Nelson <dnelson@redhat.com>
Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

9 years agoKVM: fix typo in copyright notice
Nicolas Kaiser [Wed, 6 Oct 2010 12:23:22 +0000]
KVM: fix typo in copyright notice

Fix typo in copyright notice.

Signed-off-by: Nicolas Kaiser <nikai@nikai.net>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

9 years agoKVM: Disable interrupts around get_kernel_ns()
Avi Kivity [Mon, 4 Oct 2010 10:55:49 +0000]
KVM: Disable interrupts around get_kernel_ns()

get_kernel_ns() wants preemption disabled.  It doesn't make a lot of sense
during the get/set ioctls (no way to make them non-racy) but the callee wants
it.

Signed-off-by: Avi Kivity <avi@redhat.com>

9 years agoKVM: MMU: Avoid sign extension in mmu_alloc_direct_roots() pae root address
Avi Kivity [Sun, 3 Oct 2010 16:51:39 +0000]
KVM: MMU: Avoid sign extension in mmu_alloc_direct_roots() pae root address

Signed-off-by: Avi Kivity <avi@redhat.com>

9 years agoKVM: MMU: move access code parsing to FNAME(walk_addr) function
Xiao Guangrong [Tue, 28 Sep 2010 09:03:14 +0000]
KVM: MMU: move access code parsing to FNAME(walk_addr) function

Move access code parsing from caller site to FNAME(walk_addr) function

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

9 years agoKVM: MMU: audit: check whether have unsync sps after root sync
Xiao Guangrong [Mon, 27 Sep 2010 10:09:29 +0000]
KVM: MMU: audit: check whether have unsync sps after root sync

After root synced, all unsync sps are synced, this patch add a check to make
sure it's no unsync sps in VCPU's page table

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

9 years agoKVM: MMU: audit: introduce audit_printk to cleanup audit code
Xiao Guangrong [Mon, 27 Sep 2010 10:07:59 +0000]
KVM: MMU: audit: introduce audit_printk to cleanup audit code

Introduce audit_printk, and record audit point instead audit name

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

9 years agoKVM: MMU: audit: unregister audit tracepoints before module unloaded
Xiao Guangrong [Mon, 27 Sep 2010 10:07:07 +0000]
KVM: MMU: audit: unregister audit tracepoints before module unloaded

fix:

Call Trace:
 [<ffffffffa01e46ba>] ? kvm_mmu_pte_write+0x229/0x911 [kvm]
 [<ffffffffa01c6ba9>] ? gfn_to_memslot+0x39/0xa0 [kvm]
 [<ffffffffa01c6c26>] ? mark_page_dirty+0x16/0x2e [kvm]
 [<ffffffffa01c6d6f>] ? kvm_write_guest_page+0x67/0x7f [kvm]
 [<ffffffff81066fbd>] ? local_clock+0x2a/0x3b
 [<ffffffffa01d52ce>] emulator_write_phys+0x46/0x54 [kvm]
 ......
Code:  Bad RIP value.
RIP  [<ffffffffa0172056>] 0xffffffffa0172056
 RSP <ffff880134f69a70>
CR2: ffffffffa0172056

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

9 years agoKVM: MMU: audit: fix vcpu's spte walking
Xiao Guangrong [Mon, 27 Sep 2010 10:06:16 +0000]
KVM: MMU: audit: fix vcpu's spte walking

After nested nested paging, it may using long mode to shadow 32/PAE paging
guest, so this patch fix it

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

9 years agoKVM: MMU: set access bit for direct mapping
Xiao Guangrong [Mon, 27 Sep 2010 10:05:00 +0000]
KVM: MMU: set access bit for direct mapping

Set access bit while setup up direct page table if it's nonpaing or npt enabled,
it's good for CPU's speculate access

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

9 years agoKVM: MMU: cleanup for error mask set while walk guest page table
Xiao Guangrong [Mon, 27 Sep 2010 10:03:27 +0000]
KVM: MMU: cleanup for error mask set while walk guest page table

Small cleanup for set page fault error code

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

9 years agoKVM: MMU: update 'root_hpa' out of loop in PAE shadow path
Xiao Guangrong [Mon, 27 Sep 2010 10:02:12 +0000]
KVM: MMU: update 'root_hpa' out of loop in PAE shadow path

The value of 'vcpu->arch.mmu.pae_root' is not modified, so we can update
'root_hpa' out of the loop.

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

9 years agoKVM: x86 emulator: Eliminate compilation warning in x86_decode_insn()
Sheng Yang [Tue, 28 Sep 2010 08:33:32 +0000]
KVM: x86 emulator: Eliminate compilation warning in x86_decode_insn()

Eliminate:
arch/x86/kvm/emulate.c:801: warning: ‘sv’ may be used uninitialized in this
function

on gcc 4.1.2

Signed-off-by: Sheng Yang <sheng@linux.intel.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

9 years agoKVM: x86: Fix constant type in kvm_get_time_scale
Jan Kiszka [Sun, 26 Sep 2010 11:00:53 +0000]
KVM: x86: Fix constant type in kvm_get_time_scale

Older gcc versions complain about the improper type (for x86-32), 4.5
seems to fix this silently. However, we should better use the right type
initially.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

9 years agoKVM: VMX: Add AX to list of registers clobbered by guest switch
Jan Kiszka [Tue, 28 Sep 2010 14:37:42 +0000]
KVM: VMX: Add AX to list of registers clobbered by guest switch

By chance this caused no harm so far. We overwrite AX during switch
to/from guest context, so we must declare this.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

9 years agoKVM guest: Move a printk that's using the clock before it's ready
Arjan Koers [Mon, 2 Aug 2010 21:35:28 +0000]
KVM guest: Move a printk that's using the clock before it's ready

Fix a hang during SMP kernel boot on KVM that showed up
after commit 489fb490dbf8dab0249ad82b56688ae3842a79e8
(2.6.35) and 59aab522154a2f17b25335b63c1cf68a51fb6ae0
(2.6.34.1). The problem only occurs when
CONFIG_PRINTK_TIME is set.

KVM-Stable-Tag.
Signed-off-by: Arjan Koers <0h61vkll2ly8@xutrox.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

9 years agoKVM: x86: TSC catchup mode
Zachary Amsden [Sun, 19 Sep 2010 00:38:15 +0000]
KVM: x86: TSC catchup mode

Negate the effects of AN TYM spell while kvm thread is preempted by tracking
conversion factor to the highest TSC rate and catching the TSC up when it has
fallen behind the kernel view of time.  Note that once triggered, we don't
turn off catchup mode.

A slightly more clever version of this is possible, which only does catchup
when TSC rate drops, and which specifically targets only CPUs with broken
TSC, but since these all are considered unstable_tsc(), this patch covers
all necessary cases.

Signed-off-by: Zachary Amsden <zamsden@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

9 years agoKVM: x86: Rename timer function
Zachary Amsden [Sun, 19 Sep 2010 00:38:14 +0000]
KVM: x86: Rename timer function

This just changes some names to better reflect the usage they
will be given.  Separated out to keep confusion to a minimum.

Signed-off-by: Zachary Amsden <zamsden@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

9 years agoKVM: x86: Make math work for other scales
Zachary Amsden [Sun, 19 Sep 2010 00:38:13 +0000]
KVM: x86: Make math work for other scales

The math in kvm_get_time_scale relies on the fact that
NSEC_PER_SEC < 2^32.  To use the same function to compute
arbitrary time scales, we must extend the first reduction
step to shrink the base rate to a 32-bit value, and
possibly reduce the scaled rate into a 32-bit as well.

Note we must take care to avoid an arithmetic overflow
when scaling up the tps32 value (this could not happen
with the fixed scaled value of NSEC_PER_SEC, but can
happen with scaled rates above 2^31.

Signed-off-by: Zachary Amsden <zamsden@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

9 years agoKVM: cpu_relax() during spin waiting for reboot
Avi Kivity [Tue, 21 Sep 2010 17:59:44 +0000]
KVM: cpu_relax() during spin waiting for reboot

It doesn't really matter, but if we spin, we should spin in a more relaxed
manner.  This way, if something goes wrong at least it won't contribute to
global warming.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

9 years agoKVM: VMX: Respect interrupt window in big real mode
Avi Kivity [Sun, 19 Sep 2010 12:34:08 +0000]
KVM: VMX: Respect interrupt window in big real mode

If an interrupt is pending, we need to stop emulation so we
can inject it.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

9 years agoKVM: VMX: Emulated real mode interrupt injection
Mohammed Gamal [Sun, 19 Sep 2010 12:34:07 +0000]
KVM: VMX: Emulated real mode interrupt injection

Replace the inject-as-software-interrupt hack we currently have with
emulated injection.

Signed-off-by: Mohammed Gamal <m.gamal005@gmail.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

9 years agoKVM: Add kvm_inject_realmode_interrupt() wrapper
Mohammed Gamal [Sun, 19 Sep 2010 12:34:06 +0000]
KVM: Add kvm_inject_realmode_interrupt() wrapper

This adds a wrapper function kvm_inject_realmode_interrupt() around the
emulator function emulate_int_real() to allow real mode interrupt injection.

[avi: initialize operand and address sizes before emulating interrupts]
[avi: initialize rip for real mode interrupt injection]
[avi: clear interrupt pending flag after emulating interrupt injection]

Signed-off-by: Mohammed Gamal <m.gamal005@gmail.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

9 years agoKVM: x86 emulator: Expose emulate_int_real()
Mohammed Gamal [Sun, 19 Sep 2010 12:34:05 +0000]
KVM: x86 emulator: Expose emulate_int_real()

Signed-off-by: Mohammed Gamal <m.gamal005@gmail.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

9 years agoKVM: MMU: fix counting of rmap entries in rmap_add()
Hillf Danton [Sat, 18 Sep 2010 00:41:02 +0000]
KVM: MMU: fix counting of rmap entries in rmap_add()

It seems that rmap entries are under counted.

Signed-off-by: Hillf Danton <dhillf@gmail.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

9 years agoKVM: document 'kvm.mmu_audit' parameter
Xiao Guangrong [Mon, 20 Sep 2010 14:17:48 +0000]
KVM: document 'kvm.mmu_audit' parameter

Document this parameter into Documentation/kernel-parameters.txt

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

9 years agoKVM: fix the description of kvm-amd.nested in documentation
Xiao Guangrong [Mon, 20 Sep 2010 14:16:45 +0000]
KVM: fix the description of kvm-amd.nested in documentation

The default state of 'kvm-amd.nested' is enabled now, so fix the documentation

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

9 years agoKVM: SVM: do not generate "external interrupt exit" if other exit is pending
Gleb Natapov [Mon, 20 Sep 2010 08:15:32 +0000]
KVM: SVM: do not generate "external interrupt exit" if other exit is pending

Nested SVM checks for external interrupt after injecting nested exception.
In case there is external interrupt pending the code generates "external
interrupt exit" and overwrites previous exit info. If previously injected
exception already generated exit it will be lost.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Acked-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

9 years agoKVM: Convert PIC lock from raw spinlock to ordinary spinlock
Avi Kivity [Sun, 19 Sep 2010 16:44:07 +0000]
KVM: Convert PIC lock from raw spinlock to ordinary spinlock

The PIC code used to be called from preempt_disable() context, which
wasn't very good for PREEMPT_RT.  That is no longer the case, so move
back from raw_spinlock_t to spinlock_t.

Signed-off-by: Avi Kivity <avi@redhat.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

9 years agoKVM: x86: Fix kvmclock bug
Zachary Amsden [Sun, 19 Sep 2010 00:38:12 +0000]
KVM: x86: Fix kvmclock bug

If preempted after kvmclock values are updated, but before hardware
virtualization is entered, the last tsc time as read by the guest is
never set.  It underflows the next time kvmclock is updated if there
has not yet been a successful entry / exit into hardware virt.

Fix this by simply setting last_tsc to the newly read tsc value so
that any computed nsec advance of kvmclock is nulled.

Signed-off-by: Zachary Amsden <zamsden@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

9 years agoKVM: MMU: Don't track nested fault info in error-code
Joerg Roedel [Tue, 14 Sep 2010 15:46:12 +0000]
KVM: MMU: Don't track nested fault info in error-code

This patch moves the detection whether a page-fault was
nested or not out of the error code and moves it into a
separate variable in the fault struct.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

9 years agoKVM: VMX: Move fixup_rmode_irq() to avoid forward declaration
Avi Kivity [Thu, 22 Jul 2010 10:09:54 +0000]
KVM: VMX: Move fixup_rmode_irq() to avoid forward declaration

No code changes.

Signed-off-by: Avi Kivity <avi@redhat.com>

9 years agoKVM: Non-atomic interrupt injection
Avi Kivity [Tue, 20 Jul 2010 12:06:17 +0000]
KVM: Non-atomic interrupt injection

Change the interrupt injection code to work from preemptible, interrupts
enabled context.  This works by adding a ->cancel_injection() operation
that undoes an injection in case we were not able to actually enter the guest
(this condition could never happen with atomic injection).

Signed-off-by: Avi Kivity <avi@redhat.com>

9 years agoKVM: VMX: Parameterize vmx_complete_interrupts() for both exit and entry
Avi Kivity [Tue, 20 Jul 2010 11:43:23 +0000]
KVM: VMX: Parameterize vmx_complete_interrupts() for both exit and entry

Currently vmx_complete_interrupts() can decode event information from vmx
exit fields into the generic kvm event queues.  Make it able to decode
the information from the entry fields as well by parametrizing it.

Signed-off-by: Avi Kivity <avi@redhat.com>

9 years agoKVM: VMX: Move real-mode interrupt injection fixup to vmx_complete_interrupts()
Avi Kivity [Thu, 22 Jul 2010 09:54:21 +0000]
KVM: VMX: Move real-mode interrupt injection fixup to vmx_complete_interrupts()

This allows reuse of vmx_complete_interrupts() for cancelling injections.

Signed-off-by: Avi Kivity <avi@redhat.com>

9 years agoKVM: VMX: Split up vmx_complete_interrupts()
Avi Kivity [Tue, 20 Jul 2010 11:31:20 +0000]
KVM: VMX: Split up vmx_complete_interrupts()

vmx_complete_interrupts() does too much, split it up:
 - vmx_vcpu_run() gets the "cache important vmcs fields" part
 - a new vmx_complete_atomic_exit() gets the parts that must be done atomically
 - a new vmx_recover_nmi_blocking() does what its name says
 - vmx_complete_interrupts() retains the event injection recovery code

This helps in reducing the work done in atomic context.

Signed-off-by: Avi Kivity <avi@redhat.com>

9 years agoKVM: Check for pending events before attempting injection
Avi Kivity [Tue, 27 Jul 2010 09:30:24 +0000]
KVM: Check for pending events before attempting injection

Instead of blindly attempting to inject an event before each guest entry,
check for a possible event first in vcpu->requests.  Sites that can trigger
event injection are modified to set KVM_REQ_EVENT:

- interrupt, nmi window opening
- ppr updates
- i8259 output changes
- local apic irr changes
- rflags updates
- gif flag set
- event set on exit

This improves non-injecting entry performance, and sets the stage for
non-atomic injection.

Signed-off-by: Avi Kivity <avi@redhat.com>

9 years agoKVM: MMU: Fix regression with ept memory types merged into non-ept page tables
Avi Kivity [Mon, 13 Sep 2010 14:45:28 +0000]
KVM: MMU: Fix regression with ept memory types merged into non-ept page tables

Commit "KVM: MMU: Make tdp_enabled a mmu-context parameter" made real-mode
set ->direct_map, and changed the code that merges in the memory type depend
on direct_map instead of tdp_enabled.  However, in this case what really
matters is tdp, not direct_map, since tdp changes the pte format regardless
of whether the mapping is direct or not.

As a result, real-mode shadow mappings got corrupted with ept memory types.
The result was a huge slowdown, likely due to the cache being disabled.

Change it back as the simplest fix for the regression (real fix is to move
all that to vmx code, and not use tdp_enabled as a synonym for ept).

Signed-off-by: Avi Kivity <avi@redhat.com>

9 years agoKVM: Document that KVM_GET_SUPPORTED_CPUID may return emulated values
Avi Kivity [Sun, 12 Sep 2010 14:39:11 +0000]
KVM: Document that KVM_GET_SUPPORTED_CPUID may return emulated values

Signed-off-by: Avi Kivity <avi@redhat.com>