GitHub/mt8127/android_kernel_alcatel_ttab.git
13 years agoXZ: Fix missing <linux/kernel.h> include
Lasse Collin [Sun, 24 Jul 2011 16:54:25 +0000 (19:54 +0300)]
XZ: Fix missing <linux/kernel.h> include

<linux/kernel.h> is needed for min_t. The old version
happened to work on x86 because <asm/unaligned.h>
indirectly includes <linux/kernel.h>, but it didn't
work on ARM.

<linux/kernel.h> includes <asm/byteorder.h> so it's
not necessary to include it explicitly anymore.

Signed-off-by: Lasse Collin <lasse.collin@tukaani.org>
Cc: stable <stable@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agoMerge branch 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6
Linus Torvalds [Sun, 24 Jul 2011 16:55:45 +0000 (09:55 -0700)]
Merge branch 'for-linus' of git://git390.marist.edu/linux-2.6

* 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6: (21 commits)
  [S390] use siginfo for sigtrap signals
  [S390] dasd: add enhanced DASD statistics interface
  [S390] kvm: make sigp emerg smp capable
  [S390] disable cpu measurement alerts on a dying cpu
  [S390] initial cr0 bits
  [S390] iucv cr0 enablement bit
  [S390] race safe external interrupt registration
  [S390] remove tape block docu
  [S390] ap: toleration support for ap device type 10
  [S390] cleanup program check handler prototypes
  [S390] remove kvm mmu reload on s390
  [S390] Use gmap translation for accessing guest memory
  [S390] use gmap address spaces for kvm guest images
  [S390] kvm guest address space mapping
  [S390] fix s390 assembler code alignments
  [S390] move sie code to entry.S
  [S390] kvm: handle tprot intercepts
  [S390] qdio: clear shared DSCI before scheduling the queue handler
  [S390] reference bit testing for unmapped pages
  [S390] irqs: Do not trace arch_local_{*,irq_*} functions
  ...

13 years agoMerge branch 'for-upstream' of git://openrisc.net/jonas/linux
Linus Torvalds [Sun, 24 Jul 2011 16:55:18 +0000 (09:55 -0700)]
Merge branch 'for-upstream' of git://openrisc.net/jonas/linux

* 'for-upstream' of git://openrisc.net/jonas/linux: (24 commits)
  OpenRISC: Add MAINTAINERS entry
  OpenRISC: Miscellaneous
  OpenRISC: Library routines
  OpenRISC: Headers
  OpenRISC: Traps
  OpenRISC: Module support
  OpenRISC: GPIO
  OpenRISC: Scheduling/Process management
  OpenRISC: Idle/Power management
  OpenRISC: System calls
  OpenRISC: IRQ
  OpenRISC: Timekeeping
  OpenRISC: DMA
  OpenRISC: PTrace
  OpenRISC: Build infrastructure
  OpenRISC: Signal handling
  OpenRISC: Memory management
  OpenRISC: Device tree
  OpenRISC: Boot code
  iomap: make IOPORT/PCI mapping functions conditional
  ...

13 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus
Linus Torvalds [Sun, 24 Jul 2011 16:54:54 +0000 (09:54 -0700)]
Merge git://git./linux/kernel/git/rusty/linux-2.6-for-linus

* git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus:
  modpost: Fix modpost's license checking V3
  module: add /sys/module/<name>/uevent files
  module: change attr callbacks to take struct module_kobject
  modules: make arch's use default loader hooks
  modules: add default loader hook implementations
  param: fix return value handling in param_set_*

13 years agoMerge branch 'kvm-updates/3.1' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Linus Torvalds [Sun, 24 Jul 2011 16:07:03 +0000 (09:07 -0700)]
Merge branch 'kvm-updates/3.1' of git://git./virt/kvm/kvm

* 'kvm-updates/3.1' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (143 commits)
  KVM: IOMMU: Disable device assignment without interrupt remapping
  KVM: MMU: trace mmio page fault
  KVM: MMU: mmio page fault support
  KVM: MMU: reorganize struct kvm_shadow_walk_iterator
  KVM: MMU: lockless walking shadow page table
  KVM: MMU: do not need atomicly to set/clear spte
  KVM: MMU: introduce the rules to modify shadow page table
  KVM: MMU: abstract some functions to handle fault pfn
  KVM: MMU: filter out the mmio pfn from the fault pfn
  KVM: MMU: remove bypass_guest_pf
  KVM: MMU: split kvm_mmu_free_page
  KVM: MMU: count used shadow pages on prepareing path
  KVM: MMU: rename 'pt_write' to 'emulate'
  KVM: MMU: cleanup for FNAME(fetch)
  KVM: MMU: optimize to handle dirty bit
  KVM: MMU: cache mmio info on page fault path
  KVM: x86: introduce vcpu_mmio_gva_to_gpa to cleanup the code
  KVM: MMU: do not update slot bitmap if spte is nonpresent
  KVM: MMU: fix walking shadow page table
  KVM guest: KVM Steal time registration
  ...

13 years agoMerge branch 'upstream/xen-tracing2' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 24 Jul 2011 16:06:47 +0000 (09:06 -0700)]
Merge branch 'upstream/xen-tracing2' of git://git./linux/kernel/git/jeremy/xen

* 'upstream/xen-tracing2' of git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen:
  xen/trace: use class for multicall trace
  xen/trace: convert mmu events to use DECLARE_EVENT_CLASS()/DEFINE_EVENT()
  xen/multicall: move *idx fields to start of mc_buffer
  xen/multicall: special-case singleton hypercalls
  xen/multicalls: add unlikely around slowpath in __xen_mc_entry()
  xen/multicalls: disable MC_DEBUG
  xen/mmu: tune pgtable alloc/release
  xen/mmu: use extend_args for more mmuext updates
  xen/trace: add tlb flush tracepoints
  xen/trace: add segment desc tracing
  xen/trace: add xen_pgd_(un)pin tracepoints
  xen/trace: add ptpage alloc/release tracepoints
  xen/trace: add mmu tracepoints
  xen/trace: add multicall tracing
  xen/trace: set up tracepoint skeleton
  xen/multicalls: remove debugfs stats
  trace/xen: add skeleton for Xen trace events

13 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Linus Torvalds [Sun, 24 Jul 2011 16:05:32 +0000 (09:05 -0700)]
Merge git://git./linux/kernel/git/herbert/crypto-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (34 commits)
  crypto: caam - ablkcipher support
  crypto: caam - faster aead implementation
  crypto: caam - structure renaming
  crypto: caam - shorter names
  crypto: talitos - don't bad_key in ablkcipher setkey
  crypto: talitos - remove unused giv from ablkcipher methods
  crypto: talitos - don't set done notification in hot path
  crypto: talitos - ensure request ordering within a single tfm
  crypto: gf128mul - fix call to memset()
  crypto: s390 - support hardware accelerated SHA-224
  crypto: algif_hash - Handle initial af_alg_make_sg error correctly
  crypto: sha1_generic - use SHA1_BLOCK_SIZE
  hwrng: ppc4xx - add support for ppc4xx TRNG
  crypto: crypto4xx - Perform read/modify/write on device control register
  crypto: caam - fix build warning when DEBUG_FS not configured
  crypto: arc4 - Fixed coding style issues
  crypto: crc32c - Fixed coding style issue
  crypto: omap-sham - do not schedule tasklet if there is no active requests
  crypto: omap-sham - clear device flags when finishing request
  crypto: omap-sham - irq handler must not clear error code
  ...

13 years agomodpost: Fix modpost's license checking V3
Alessio Igor Bogani [Thu, 14 Jul 2011 06:51:16 +0000 (08:51 +0200)]
modpost: Fix modpost's license checking V3

The commit f02e8a6 sorts symbols placing each of them in its own elf section.
The sorting and merging into the canonical sections are done by the linker.
Unfortunately modpost to generate Module.symvers file parses vmlinux
(already linked) and all modules object files (which aren't linked yet).
These aren't sanitized by the linker yet. That breaks modpost that can't
detect license properly for modules. This patch makes modpost aware of
the new exported symbols structure.

Thanks to Arnaud Lacombe <lacombar@gmail.com> and Anders Kaseorg
<andersk@ksplice.com> for providing useful suggestions about code.

This work was supported by a hardware donation from the CE Linux Forum.

Reported-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Alessio Igor Bogani <abogani@kernel.org>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
13 years agomodule: add /sys/module/<name>/uevent files
Kay Sievers [Sun, 24 Jul 2011 12:36:04 +0000 (22:06 +0930)]
module: add /sys/module/<name>/uevent files

Userspace wants to manage module parameters with udev rules.
This currently only works for loaded modules, but not for
built-in ones.

To allow access to the built-in modules we need to
re-trigger all module load events that happened before any
userspace was running. We already do the same thing for all
devices, subsystems(buses) and drivers.

This adds the currently missing /sys/module/<name>/uevent files
to all module entries.

Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (split & trivial fix)
13 years agomodule: change attr callbacks to take struct module_kobject
Kay Sievers [Sun, 24 Jul 2011 12:36:04 +0000 (22:06 +0930)]
module: change attr callbacks to take struct module_kobject

This simplifies the next patch, where we have an attribute on a
builtin module (ie. module == NULL).

Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (split into 2)
13 years agomodules: make arch's use default loader hooks
Jonas Bonn [Thu, 30 Jun 2011 19:22:12 +0000 (21:22 +0200)]
modules: make arch's use default loader hooks

This patch removes all the module loader hook implementations in the
architecture specific code where the functionality is the same as that
now provided by the recently added default hooks.

Signed-off-by: Jonas Bonn <jonas@southpole.se>
Acked-by: Mike Frysinger <vapier@gentoo.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Tested-by: Michal Simek <monstr@monstr.eu>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
13 years agomodules: add default loader hook implementations
Jonas Bonn [Thu, 30 Jun 2011 19:22:11 +0000 (21:22 +0200)]
modules: add default loader hook implementations

The module loader code allows architectures to hook into the code by
providing a small number of entry points that each arch must implement.
This patch provides __weakly linked generic implementations of these
entry points for architectures that don't need to do anything special.

Signed-off-by: Jonas Bonn <jonas@southpole.se>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
13 years agoparam: fix return value handling in param_set_*
Satoru Moriya [Thu, 26 May 2011 23:38:04 +0000 (19:38 -0400)]
param: fix return value handling in param_set_*

In STANDARD_PARAM_DEF, param_set_* handles the case in which strtolfn
returns -EINVAL but it may return -ERANGE. If it returns -ERANGE,
param_set_* may set uninitialized value to the paramerter. We should handle
both cases.

The one of the cases in which strtolfn() returns -ERANGE is following:

 *Type of module parameter is long
 *Set the parameter more than LONG_MAX

Signed-off-by: Satoru Moriya <satoru.moriya@hds.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
13 years agoKVM: IOMMU: Disable device assignment without interrupt remapping
Alex Williamson [Thu, 14 Jul 2011 19:27:03 +0000 (13:27 -0600)]
KVM: IOMMU: Disable device assignment without interrupt remapping

IOMMU interrupt remapping support provides a further layer of
isolation for device assignment by preventing arbitrary interrupt
block DMA writes by a malicious guest from reaching the host.  By
default, we should require that the platform provides interrupt
remapping support, with an opt-in mechanism for existing behavior.

Both AMD IOMMU and Intel VT-d2 hardware support interrupt
remapping, however we currently only have software support on
the Intel side.  Users wishing to re-enable device assignment
when interrupt remapping is not supported on the platform can
use the "allow_unsafe_assigned_interrupts=1" module option.

[avi: break long lines]

Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
13 years agoKVM: MMU: trace mmio page fault
Xiao Guangrong [Mon, 11 Jul 2011 19:34:24 +0000 (03:34 +0800)]
KVM: MMU: trace mmio page fault

Add tracepoints to trace mmio page fault

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
13 years agoKVM: MMU: mmio page fault support
Xiao Guangrong [Mon, 11 Jul 2011 19:33:44 +0000 (03:33 +0800)]
KVM: MMU: mmio page fault support

The idea is from Avi:

| We could cache the result of a miss in an spte by using a reserved bit, and
| checking the page fault error code (or seeing if we get an ept violation or
| ept misconfiguration), so if we get repeated mmio on a page, we don't need to
| search the slot list/tree.
| (https://lkml.org/lkml/2011/2/22/221)

When the page fault is caused by mmio, we cache the info in the shadow page
table, and also set the reserved bits in the shadow page table, so if the mmio
is caused again, we can quickly identify it and emulate it directly

Searching mmio gfn in memslots is heavy since we need to walk all memeslots, it
can be reduced by this feature, and also avoid walking guest page table for
soft mmu.

[jan: fix operator precedence issue]

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
13 years agoKVM: MMU: reorganize struct kvm_shadow_walk_iterator
Xiao Guangrong [Mon, 11 Jul 2011 19:32:54 +0000 (03:32 +0800)]
KVM: MMU: reorganize struct kvm_shadow_walk_iterator

Reorganize it for good using the cache

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
13 years agoKVM: MMU: lockless walking shadow page table
Xiao Guangrong [Mon, 11 Jul 2011 19:32:13 +0000 (03:32 +0800)]
KVM: MMU: lockless walking shadow page table

Use rcu to protect shadow pages table to be freed, so we can safely walk it,
it should run fastly and is needed by mmio page fault

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
13 years agoKVM: MMU: do not need atomicly to set/clear spte
Xiao Guangrong [Mon, 11 Jul 2011 19:31:28 +0000 (03:31 +0800)]
KVM: MMU: do not need atomicly to set/clear spte

Now, the spte is just from nonprsent to present or present to nonprsent, so
we can use some trick to set/clear spte non-atomicly as linux kernel does

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
13 years agoKVM: MMU: introduce the rules to modify shadow page table
Xiao Guangrong [Mon, 11 Jul 2011 19:30:35 +0000 (03:30 +0800)]
KVM: MMU: introduce the rules to modify shadow page table

Introduce some interfaces to modify spte as linux kernel does:
- mmu_spte_clear_track_bits, it set the spte from present to nonpresent, and
  track the stat bits(accessed/dirty) of spte
- mmu_spte_clear_no_track, the same as mmu_spte_clear_track_bits except
  tracking the stat bits
- mmu_spte_set, set spte from nonpresent to present
- mmu_spte_update, only update the stat bits

Now, it does not allowed to set spte from present to present, later, we can
drop the atomicly opration for X86_32 host, and it is the preparing work to
get spte on X86_32 host out of the mmu lock

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
13 years agoKVM: MMU: abstract some functions to handle fault pfn
Xiao Guangrong [Mon, 11 Jul 2011 19:29:38 +0000 (03:29 +0800)]
KVM: MMU: abstract some functions to handle fault pfn

Introduce handle_abnormal_pfn to handle fault pfn on page fault path,
introduce mmu_invalid_pfn to handle fault pfn on prefetch path

It is the preparing work for mmio page fault support

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
13 years agoKVM: MMU: filter out the mmio pfn from the fault pfn
Xiao Guangrong [Mon, 11 Jul 2011 19:28:54 +0000 (03:28 +0800)]
KVM: MMU: filter out the mmio pfn from the fault pfn

If the page fault is caused by mmio, the gfn can not be found in memslots, and
'bad_pfn' is returned on gfn_to_hva path, so we can use 'bad_pfn' to identify
the mmio page fault.
And, to clarify the meaning of mmio pfn, we return fault page instead of bad
page when the gfn is not allowd to prefetch

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
13 years agoKVM: MMU: remove bypass_guest_pf
Xiao Guangrong [Mon, 11 Jul 2011 19:28:04 +0000 (03:28 +0800)]
KVM: MMU: remove bypass_guest_pf

The idea is from Avi:
| Maybe it's time to kill off bypass_guest_pf=1.  It's not as effective as
| it used to be, since unsync pages always use shadow_trap_nonpresent_pte,
| and since we convert between the two nonpresent_ptes during sync and unsync.

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
13 years agoKVM: MMU: split kvm_mmu_free_page
Xiao Guangrong [Mon, 11 Jul 2011 19:27:14 +0000 (03:27 +0800)]
KVM: MMU: split kvm_mmu_free_page

Split kvm_mmu_free_page to kvm_mmu_isolate_page and
kvm_mmu_free_page

One is used to remove the page from cache under mmu lock and the other is
used to free page table out of mmu lock

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
13 years agoKVM: MMU: count used shadow pages on prepareing path
Xiao Guangrong [Mon, 11 Jul 2011 19:26:40 +0000 (03:26 +0800)]
KVM: MMU: count used shadow pages on prepareing path

Move counting used shadow pages from commiting path to preparing path to
reduce tlb flush on some paths

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
13 years agoKVM: MMU: rename 'pt_write' to 'emulate'
Xiao Guangrong [Mon, 11 Jul 2011 19:25:56 +0000 (03:25 +0800)]
KVM: MMU: rename 'pt_write' to 'emulate'

If 'pt_write' is true, we need to emulate the fault. And in later patch, we
need to emulate the fault even though it is not a pt_write event, so rename
it to better fit the meaning

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
13 years agoKVM: MMU: cleanup for FNAME(fetch)
Xiao Guangrong [Mon, 11 Jul 2011 19:25:19 +0000 (03:25 +0800)]
KVM: MMU: cleanup for FNAME(fetch)

gw->pte_access is the final access permission, since it is unified with
gw->pt_access when we walked guest page table:

FNAME(walk_addr_generic):
pte_access = pt_access & FNAME(gpte_access)(vcpu, pte, true);

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
13 years agoKVM: MMU: optimize to handle dirty bit
Xiao Guangrong [Mon, 11 Jul 2011 19:24:39 +0000 (03:24 +0800)]
KVM: MMU: optimize to handle dirty bit

If dirty bit is not set, we can make the pte access read-only to avoid handing
dirty bit everywhere

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
13 years agoKVM: MMU: cache mmio info on page fault path
Xiao Guangrong [Mon, 11 Jul 2011 19:23:20 +0000 (03:23 +0800)]
KVM: MMU: cache mmio info on page fault path

If the page fault is caused by mmio, we can cache the mmio info, later, we do
not need to walk guest page table and quickly know it is a mmio fault while we
emulate the mmio instruction

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
13 years agoKVM: x86: introduce vcpu_mmio_gva_to_gpa to cleanup the code
Xiao Guangrong [Mon, 11 Jul 2011 19:22:46 +0000 (03:22 +0800)]
KVM: x86: introduce vcpu_mmio_gva_to_gpa to cleanup the code

Introduce vcpu_mmio_gva_to_gpa to translate the gva to gpa, we can use it
to cleanup the code between read emulation and write emulation

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
13 years agoKVM: MMU: do not update slot bitmap if spte is nonpresent
Xiao Guangrong [Mon, 11 Jul 2011 19:22:01 +0000 (03:22 +0800)]
KVM: MMU: do not update slot bitmap if spte is nonpresent

Set slot bitmap only if the spte is present

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
13 years agoKVM: MMU: fix walking shadow page table
Xiao Guangrong [Mon, 11 Jul 2011 19:21:17 +0000 (03:21 +0800)]
KVM: MMU: fix walking shadow page table

Properly check the last mapping, and do not walk to the next level if last spte
is met

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
13 years agoKVM guest: KVM Steal time registration
Glauber Costa [Mon, 11 Jul 2011 19:28:19 +0000 (15:28 -0400)]
KVM guest: KVM Steal time registration

This patch implements the kvm bits of the steal time infrastructure.
The most important part of it, is the steal time clock. It is an
continuous clock that shows the accumulated amount of steal time
since vcpu creation. It is supposed to survive cpu offlining/onlining.

[marcelo: fix build with CONFIG_KVM_GUEST=n]

Signed-off-by: Glauber Costa <glommer@redhat.com>
Acked-by: Rik van Riel <riel@redhat.com>
Tested-by: Eric B Munson <emunson@mgebm.net>
CC: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
CC: Peter Zijlstra <peterz@infradead.org>
CC: Avi Kivity <avi@redhat.com>
CC: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
13 years ago[S390] use siginfo for sigtrap signals
Martin Schwidefsky [Sun, 24 Jul 2011 08:48:33 +0000 (10:48 +0200)]
[S390] use siginfo for sigtrap signals

Provide additional information on SIGTRAP by using a sig_info signal.
Use TRAP_BRKPT for breakpoints via illegal operation and TRAP_HWBKPT
for breakpoints via program event recording. Provide the address of
the instruction that caused the breakpoint via si_addr.
While we are at it get rid of tracehook_consider_fatal_signal.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
13 years ago[S390] dasd: add enhanced DASD statistics interface
Stefan Weinhuber [Sun, 24 Jul 2011 08:48:32 +0000 (10:48 +0200)]
[S390] dasd: add enhanced DASD statistics interface

This patch extends the DASD statistics to allow for a more detailed
analysis of DASD I/O operations. In particular we want the statistics
to provide answers to the following questions:
- How many requests used a PAV alias?
- How many requests used High Performance FICON?
- How do read request perform versus write requests?

The existing DASD statistics interface has several shortcomings
- The interface for global data is a formatted text table in procfs
  (/proc/dasd/statistics). The layout is meant for human readers and
  is not to easy to parse. If values get to large for the table
  layout, they get scaled down.
- The statistics which are collected per block device can be
  accessed via an ioctl interface, which can only be extended by
  defining a new ioctl.
- There is no statistics interface for individual PAV base and alias
  devices.

To overcome theses shortcomings we create a new DASD statistics
interface in debugfs. This interface will contain one entry for global
data, one per DASD block device, and one per DASD base and alias
device. Each file contains the statistic data in easy to parse
name/value and name/array pairs. The existing interfaces will remain
functional, but they will not be extended.

Signed-off-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
13 years ago[S390] kvm: make sigp emerg smp capable
Christian Ehrhardt [Sun, 24 Jul 2011 08:48:31 +0000 (10:48 +0200)]
[S390] kvm: make sigp emerg smp capable

SIGP emerg needs to pass the source vpu adress into __LC_CPU_ADDRESS of the
target guest.

Signed-off-by: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
13 years ago[S390] disable cpu measurement alerts on a dying cpu
Jan Glauber [Sun, 24 Jul 2011 08:48:30 +0000 (10:48 +0200)]
[S390] disable cpu measurement alerts on a dying cpu

The cpu measurement alerts that are used for instance by oprofile
for hardware sampling are not turned off on a cpu that is going
offline. Add the appropriate control register bit that should be
disabled to the list.

Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
13 years ago[S390] initial cr0 bits
Martin Schwidefsky [Sun, 24 Jul 2011 08:48:29 +0000 (10:48 +0200)]
[S390] initial cr0 bits

Remove outdated bits from the initial cr0 register.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
13 years ago[S390] iucv cr0 enablement bit
Martin Schwidefsky [Sun, 24 Jul 2011 08:48:28 +0000 (10:48 +0200)]
[S390] iucv cr0 enablement bit

Do not set the cr0 enablement bit for iucv by default in head[31|64].S,
move the enablement to iucv_init in the iucv base layer.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
13 years ago[S390] race safe external interrupt registration
Jan Glauber [Sun, 24 Jul 2011 08:48:27 +0000 (10:48 +0200)]
[S390] race safe external interrupt registration

The (un-)register_external_interrupt functions are not race safe if
more than one interrupt handler is added or deleted for an external
interrupt concurrently.

Make the registration / unregistration of external interrupts race safe
by using RCU and a spinlock. RCU is used to avoid a performance penalty
in the external interrupt handler, the register and unregister functions
are protected by the spinlock and are not performance critical.
call_rcu must be used since the SCLP driver uses the interface with
IRQs disabled. Also use the generic list implementation rather than
homebrewn list code.

Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
13 years ago[S390] remove tape block docu
Martin Schwidefsky [Sun, 24 Jul 2011 08:48:26 +0000 (10:48 +0200)]
[S390] remove tape block docu

After git commit 66ceed5ad1318863c21710f316942bcefff8081c removed
the tape block device driver, remove its documentation as well.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
13 years ago[S390] ap: toleration support for ap device type 10
Holger Dengler [Sun, 24 Jul 2011 08:48:25 +0000 (10:48 +0200)]
[S390] ap: toleration support for ap device type 10

Add toleration support for ap devices with device type 10.

Signed-off-by: Holger Dengler <hd@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
13 years ago[S390] cleanup program check handler prototypes
Martin Schwidefsky [Sun, 24 Jul 2011 08:48:24 +0000 (10:48 +0200)]
[S390] cleanup program check handler prototypes

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
13 years ago[S390] remove kvm mmu reload on s390
Carsten Otte [Sun, 24 Jul 2011 08:48:23 +0000 (10:48 +0200)]
[S390] remove kvm mmu reload on s390

This patch removes the mmu reload logic for kvm on s390. Via Martin's
new gmap interface, we can safely add or remove memory slots while
guest CPUs are in-flight. Thus, the mmu reload logic is not needed
anymore.

Signed-off-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
13 years ago[S390] Use gmap translation for accessing guest memory
Carsten Otte [Sun, 24 Jul 2011 08:48:22 +0000 (10:48 +0200)]
[S390] Use gmap translation for accessing guest memory

This patch removes kvm-s390 internal assumption of a linear mapping
of guest address space to user space. Previously, guest memory was
translated to user addresses using a fixed offset (gmsor). The new
code uses gmap_fault to resolve guest addresses.

Signed-off-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
13 years ago[S390] use gmap address spaces for kvm guest images
Carsten Otte [Sun, 24 Jul 2011 08:48:21 +0000 (10:48 +0200)]
[S390] use gmap address spaces for kvm guest images

This patch switches kvm from using (Qemu's) user address space to
Martin's gmap address space. This way QEMU does not have to use a
linker script in order to fit large guests at low addresses in its
address space.

Signed-off-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
13 years ago[S390] kvm guest address space mapping
Martin Schwidefsky [Sun, 24 Jul 2011 08:48:20 +0000 (10:48 +0200)]
[S390] kvm guest address space mapping

Add code that allows KVM to control the virtual memory layout that
is seen by a guest. The guest address space uses a second page table
that shares the last level pte-tables with the process page table.
If a page is unmapped from the process page table it is automatically
unmapped from the guest page table as well.

The guest address space mapping starts out empty, KVM can map any
individual 1MB segments from the process virtual memory to any 1MB
aligned location in the guest virtual memory. If a target segment in
the process virtual memory does not exist or is unmapped while a
guest mapping exists the desired target address is stored as an
invalid segment table entry in the guest page table.
The population of the guest page table is fault driven.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
13 years ago[S390] fix s390 assembler code alignments
Jan Glauber [Sun, 24 Jul 2011 08:48:19 +0000 (10:48 +0200)]
[S390] fix s390 assembler code alignments

The alignment is missing for various global symbols in s390 assembly code.
With a recent gcc and an instruction like stgrl this can lead to a
specification exception if the instruction uses such a mis-aligned address.

Specify the alignment explicitely and while add it define __ALIGN for s390
and use the ENTRY define to save some lines of code.

Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
13 years ago[S390] move sie code to entry.S
Martin Schwidefsky [Sun, 24 Jul 2011 08:48:18 +0000 (10:48 +0200)]
[S390] move sie code to entry.S

The entry to / exit from sie has subtle dependencies to the first level
interrupt handler. Move the sie assembler code to entry64.S and replace
the SIE_HOOK callback with a test and the new _TIF_SIE bit.
In addition this patch fixes several problems in regard to the check for
the_TIF_EXIT_SIE bits. The old code checked the TIF bits before executing
the interrupt handler and it only modified the instruction address if it
pointed directly to the sie instruction. In both cases it could miss
a TIF bit that normally would cause an exit from the guest and would
reenter the guest context.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
13 years ago[S390] kvm: handle tprot intercepts
Christian Borntraeger [Sun, 24 Jul 2011 08:48:17 +0000 (10:48 +0200)]
[S390] kvm: handle tprot intercepts

When running a kvm guest we can get intercepts for tprot, if the host
page table is read-only or not populated. This patch implements the
most common case (linux memory detection).
This also allows host copy on write for guest memory on newer systems.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
13 years ago[S390] qdio: clear shared DSCI before scheduling the queue handler
Jan Glauber [Sun, 24 Jul 2011 08:48:00 +0000 (10:48 +0200)]
[S390] qdio: clear shared DSCI before scheduling the queue handler

The following race can occur with qdio devices that use the shared device
state change indicator:

Device (Shared DSCI)    CPU0                            CPU1
===============================================================================

1. DSCI 0 => 1,
   INT pending
                        2. Thinint handler
                        * si_used = 1
                        * Inbound tasklet_schedule
                        * DSCI 1 => 0

3. DSCI 0 => 1,
   INT pending

                                                        4. Thinint handler
                                                        * si_used = 1
                                                        * Inbound tasklet_schedu
le
                                                           => NOP

                        5. Inbound tasklet run

6. DSCI = 1,
   INT surpressed

                                                        7. DSCI 1 => 0

The race would lead to a stall where new data in the input queue is
not recognized so the device stops working in case of no further traffic.

Fix the race by resetting the DSCI before scheduling the inbound tasklet
so the device generates an interrupt if new data arrives in the above
scenario in step 6.

Reviewed-by: Ursula Braun <ursula.braun@de.ibm.com>
Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
13 years ago[S390] reference bit testing for unmapped pages
Martin Schwidefsky [Sun, 24 Jul 2011 08:47:59 +0000 (10:47 +0200)]
[S390] reference bit testing for unmapped pages

On x86 a page without a mapper is by definition not referenced / old.
The s390 architecture keeps the reference bit in the storage key and
the current code will check the storage key for page without a mapper.
This leads to an interesting effect: the first time an s390 system
needs to write pages to swap it only finds referenced pages. This
causes a lot of pages to get added and written to the swap device.
To avoid this behaviour change page_referenced to query the storage
key only if there is a mapper of the page.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
13 years ago[S390] irqs: Do not trace arch_local_{*,irq_*} functions
Steven Rostedt [Sun, 24 Jul 2011 08:47:58 +0000 (10:47 +0200)]
[S390] irqs: Do not trace arch_local_{*,irq_*} functions

Do not trace arch_local_save_flags(), arch_local_irq_*() and friends.
Although they are marked inline, gcc may still make a function out of
them and add it to the pool of functions that are traced by the function
tracer. This can cause undesirable results (kernel panic, triple faults,
etc).

Add the notrace notation to prevent them from ever being traced.

Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
13 years ago[S390] kconfig: remove tape interface support comment
Martin Schwidefsky [Sun, 24 Jul 2011 08:47:57 +0000 (10:47 +0200)]
[S390] kconfig: remove tape interface support comment

There is nothing below the menu entry "S/390 tape interface support".
Remove it.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
13 years agoof: fix missing include from of_pci.c
Grant Likely [Sun, 24 Jul 2011 05:52:48 +0000 (23:52 -0600)]
of: fix missing include from of_pci.c

of_pci.c references symbols from linux/of.h.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
13 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/vapier...
Linus Torvalds [Sat, 23 Jul 2011 21:05:44 +0000 (14:05 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/vapier/blackfin

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/vapier/blackfin: (43 commits)
  Blackfin: spi-docs: further clarify GPIO CS behavior with various modes
  Blackfin: boards: fix pcm device name
  Blackfin: SMP: punt unused atomic_test_mask helper
  Blackfin: irqs: do not trace arch_local_{*,irq_*} functions
  Blackfin: bf526: restrict reboot workaround to 0.0 silicon
  Blackfin: bf51x: fix alternative portmux options
  Blackfin: bf54x: fix GPIO resume code
  Blackfin: dpmc: optimize SDRAM programming slightly
  Blackfin: dpmc: don't save/restore scratch registers
  Blackfin: bf538: pull gpio/port logic out of core hibernate paths
  Blackfin: dpmc: optimize hibernate/resume path
  Blackfin: dpmc: do not save/restore EVT0/EVT1/EVT4 when hibernating
  Blackfin: dpmc: relocate hibernate helper macros
  Blackfin: dpmc: omit RETE/RETN when hibernating
  Blackfin: dpmc: optimize SIC_IWR programming a little
  Blackfin: gpio/ints: generalize pint logic
  Blackfin: dpmc: bind to MMR names and not CPUs
  Blackfin: debug-mmrs: generalize pint logic
  Blackfin: bf54x: switch to common pint MMR struct
  Blackfin: bf54x: tweak MMR pint names
  ...

13 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie...
Linus Torvalds [Sat, 23 Jul 2011 18:14:47 +0000 (11:14 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/broonie/regmap

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap:
  regulator: Convert tps65023 to use regmap API
  regmap: Add SPI bus support
  regmap: Add I2C bus support
  regmap: Add generic non-memory mapped register access API

13 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6
Linus Torvalds [Sat, 23 Jul 2011 18:13:11 +0000 (11:13 -0700)]
Merge git://git./linux/kernel/git/jejb/scsi-misc-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6: (77 commits)
  [SCSI] fix crash in scsi_dispatch_cmd()
  [SCSI] sr: check_events() ignore GET_EVENT when TUR says otherwise
  [SCSI] bnx2i: Fixed kernel panic due to illegal usage of sc->request->cpu
  [SCSI] bfa: Update the driver version to 3.0.2.1
  [SCSI] bfa: Driver and BSG enhancements.
  [SCSI] bfa: Added support to query PHY.
  [SCSI] bfa: Added HBA diagnostics support.
  [SCSI] bfa: Added support for flash configuration
  [SCSI] bfa: Added support to obtain SFP info.
  [SCSI] bfa: Added support for CEE info and stats query.
  [SCSI] bfa: Extend BSG interface.
  [SCSI] bfa: FCS bug fixes.
  [SCSI] bfa: DMA memory allocation enhancement.
  [SCSI] bfa: Brocade-1860 Fabric Adapter vHBA support.
  [SCSI] bfa: Brocade-1860 Fabric Adapter PLL init fixes.
  [SCSI] bfa: Added Fabric Assigned Address(FAA) support
  [SCSI] bfa: IOC bug fixes.
  [SCSI] bfa: Enable ASIC block configuration and query.
  [SCSI] bnx2i: Updated copyright and bump version
  [SCSI] bnx2i: Modified to skip CNIC registration if iSCSI is not supported
  ...

Fix up some trivial conflicts in:
 - drivers/scsi/bnx2fc/{bnx2fc.h,bnx2fc_fcoe.c}:
Crazy broadcom version number conflicts
 - drivers/target/tcm_fc/tfc_cmd.c
Just trivial cleanups done on adjacent lines

13 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6
Linus Torvalds [Sat, 23 Jul 2011 17:59:37 +0000 (10:59 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/tiwai/sound-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6: (297 commits)
  ALSA: asihpi - Replace with snd_ctl_boolean_mono_info()
  ALSA: asihpi - HPI version 4.08
  ALSA: asihpi - Add volume mute controls
  ALSA: asihpi - Control name updates
  ALSA: asihpi - Use size_t for sizeof result
  ALSA: asihpi - Explicitly include mutex.h
  ALSA: asihpi - Add new node and message defines
  ALSA: asihpi - Make local function static
  ALSA: asihpi - Fix minor typos and spelling
  ALSA: asihpi - Remove unused structures, macros and functions
  ALSA: asihpi - Remove spurious adapter index check
  ALSA: asihpi - Revise snd_pcm_debug_name, get rid of DEBUG_NAME macro
  ALSA: asihpi - DSP code loader API now independent of OS
  ALSA: asihpi - Remove controlex structs and associated special data transfer code
  ALSA: asihpi - Increase request and response buffer sizes
  ALSA: asihpi - Give more meaningful name to hpi request message type
  ALSA: usb-audio - Add quirk for  Roland / BOSS BR-800
  ALSA: hda - Remove a superfluous argument of via_auto_init_output()
  ALSA: hda - Fix indep-HP path (de-)activation for VT1708* codecs
  ALSA: hda - Add documentation for codec-specific mixer controls
  ...

13 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh...
Linus Torvalds [Sat, 23 Jul 2011 17:58:49 +0000 (10:58 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/ericvh/v9fs

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs:
  net/9p: Fix the msize calculation.
  fs/9p: add 9P2000.L unlinkat operation
  fs/9p: add 9P2000.L renameat operation
  fs/9p: Always ask new inode in create
  fs/9p: Clean-up get_protocol_version() to use strcmp
  fs/9p: Fix invalid mount options/args
  fs/9p: When doing inode lookup compare qid details and inode mode bits.
  fs/9p: Fid is not valid after a failed clunk.
  net/9p: Remove structure not used in the code
  VirtIO can transfer VIRTQUEUE_NUM of pages.
  Fix the size of receive buffer packing onto VirtIO ring.
  9p: clean up packet dump code
  fs/9p: remove rename work around in 9p
  net/9p: fix client code to fail more gracefully on protocol error

13 years agoDocumentation: refresh sysctl/kernel.txt
Borislav Petkov [Sat, 23 Jul 2011 17:39:29 +0000 (10:39 -0700)]
Documentation: refresh sysctl/kernel.txt

Refresh sysctl/kernel.txt.  More specifically,

 - drop stale index entries
 - sync and sort index and entries
 - reflow sticking out paragraphs to colwidth 72
 - correct typos
 - cleanup whitespace

Signed-off-by: Borislav Petkov <bp@alien8.de>
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agoDocumentation: fix ambigous text for root cpuset
Wanlong Gao [Sat, 23 Jul 2011 17:38:17 +0000 (10:38 -0700)]
Documentation: fix ambigous text for root cpuset

Only the root cpuset has cpuset.memory_pressure_enabled flag,
but not the only one.

Signed-off-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Acked-by: Paul Menage <menage@google.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agoDocumentation: fix echo command in cgroups/cpuacct.txt
Wanlong Gao [Sat, 23 Jul 2011 17:37:01 +0000 (10:37 -0700)]
Documentation: fix echo command in cgroups/cpuacct.txt

Must echo a task id to the cgroups' tasks file, but not to a directory.

Signed-off-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>
Acked-by: Paul Menage <menage@google.com>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
13 years agoMerge branches 'x86-detect-hyper-for-linus', 'x86-fpu-for-linus', 'x86-kexec-for...
Linus Torvalds [Sat, 23 Jul 2011 17:38:21 +0000 (10:38 -0700)]
Merge branches 'x86-detect-hyper-for-linus', 'x86-fpu-for-linus', 'x86-kexec-for-linus', 'x86-platform-for-linus', 'x86-quirks-for-linus', 'x86-tsc-for-linus' and 'x86-smpboot-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'x86-detect-hyper-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, hyper: Change hypervisor detection order

* 'x86-fpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86-32, fpu: Fix DNA exception during check_fpu()

* 'x86-kexec-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  kexec, x86: Fix incorrect jump back address if not preserving context

* 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, config: Introduce an INTEL_MID configuration

* 'x86-quirks-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, quirks: Use pci_dev->revision

* 'x86-tsc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86: tsc: Remove unneeded DMI-based blacklisting

* 'x86-smpboot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, boot: Wait for boot cpu to show up if nr_cpus limit is about to hit

13 years agoMerge branch 'x86-build-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sat, 23 Jul 2011 17:36:09 +0000 (10:36 -0700)]
Merge branch 'x86-build-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'x86-build-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, build: Do not set the root_dev field in bzImage

13 years agoMerge branch 'x86-atomic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sat, 23 Jul 2011 17:35:43 +0000 (10:35 -0700)]
Merge branch 'x86-atomic-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'x86-atomic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86: Add support for cmpxchg_double

13 years agoMerge branch 'timers-clocksource-for-linus' of git://git.kernel.org/pub/scm/linux...
Linus Torvalds [Sat, 23 Jul 2011 17:34:47 +0000 (10:34 -0700)]
Merge branch 'timers-clocksource-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'timers-clocksource-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  clocksource: apb: Share APB timer code with other platforms

13 years agoMerge branches 'x86-urgent-for-linus', 'core-debug-for-linus', 'irq-core-for-linus...
Linus Torvalds [Sat, 23 Jul 2011 17:33:08 +0000 (10:33 -0700)]
Merge branches 'x86-urgent-for-linus', 'core-debug-for-linus', 'irq-core-for-linus' and 'perf-urgent-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  um: Make rwsem.S depend on CONFIG_RWSEM_XCHGADD_ALGORITHM

* 'core-debug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  debug: Make CONFIG_EXPERT select CONFIG_DEBUG_KERNEL to unhide debug options

* 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  genirq: Remove unused CHECK_IRQ_PER_CPU()

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  perf tools, x86: Fix 32-bit compile on 64-bit system

13 years agoMerge branch 'scsi-fixes'
James Bottomley [Sat, 23 Jul 2011 17:09:03 +0000 (21:09 +0400)]
Merge branch 'scsi-fixes'

13 years agonet/9p: Fix the msize calculation.
Venkateswararao Jujjuri (JV) [Thu, 30 Jun 2011 01:06:33 +0000 (18:06 -0700)]
net/9p: Fix the msize calculation.

msize represents the maximum PDU size that includes P9_IOHDRSZ.

Signed-off-by: Venkateswararao Jujjuri "<jvrao@linux.vnet.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
13 years agofs/9p: add 9P2000.L unlinkat operation
Aneesh Kumar K.V [Tue, 28 Jun 2011 10:11:18 +0000 (15:41 +0530)]
fs/9p: add 9P2000.L unlinkat operation

unlinkat - Remove a directory entry

size[4] Tunlinkat tag[2] dirfid[4] name[s] flag[4]
size[4] Runlinkat tag[2]

older Tremove have the below request format

size[4] Tremove tag[2] fid[4]

The remove message is used to remove a directory entry either file or directory
The remove opreation is actually a directory opertation and should ideally have
dirfid, if not we cannot represent the fid on server with anything other than
name. We will have to derive the directory name from fid in the Tremove request.

NOTE: The operation doesn't clunk the unlink fid.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
13 years agofs/9p: add 9P2000.L renameat operation
Aneesh Kumar K.V [Tue, 28 Jun 2011 10:11:16 +0000 (15:41 +0530)]
fs/9p: add 9P2000.L renameat operation

renameat - change name of file or directory

size[4] Trenameat tag[2] olddirfid[4] oldname[s] newdirfid[4] newname[s]
size[4] Rrenameat tag[2]

older Trename have the below request format

size[4] Trename tag[2] fid[4] newdirfid[4] name[s]

The rename message is used to change the name of a file, possibly moving it
to a new directory. The rename opreation is actually a directory opertation
and should ideally have olddirfid, if not we cannot represent the fid on server
with anything other than name. We will have to derive the old directory name
from fid in the Trename request.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
13 years agofs/9p: Always ask new inode in create
Aneesh Kumar K.V [Wed, 6 Jul 2011 11:02:31 +0000 (16:32 +0530)]
fs/9p: Always ask new inode in create

This make sure we don't end up reusing the unlinked inode object.
The ideal way is to use inode i_generation. But i_generation is
not available in userspace always.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
13 years agofs/9p: Clean-up get_protocol_version() to use strcmp
Prem Karat [Fri, 6 May 2011 13:05:32 +0000 (18:35 +0530)]
fs/9p: Clean-up get_protocol_version() to use strcmp

Signed-off-by: Prem Karat <prem.karat@linux.vnet.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
13 years agofs/9p: Fix invalid mount options/args
Prem Karat [Fri, 6 May 2011 12:54:18 +0000 (18:24 +0530)]
fs/9p: Fix invalid mount options/args

Without this fix, if any invalid mount options/args are passed while mouting
the 9p fs, no error (-EINVAL) is returned and default arg value is assigned.

This fix returns -EINVAL when an invalid arguement is found while parsing
mount options.

Signed-off-by: Prem Karat <prem.karat@linux.vnet.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
13 years agofs/9p: When doing inode lookup compare qid details and inode mode bits.
Aneesh Kumar K.V [Mon, 11 Jul 2011 16:40:59 +0000 (16:40 +0000)]
fs/9p: When doing inode lookup compare qid details and inode mode bits.

This make sure we don't use wrong inode from the inode hash. The inode number
of the file deleted is reused by the next file system object created
and if we only use inode number for inode hash lookup we could end up
with wrong struct inode.

Also compare inode generation number. Not all Linux file system provide
st_gen in userspace. So it could be 0;

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
13 years agofs/9p: Fid is not valid after a failed clunk.
Aneesh Kumar K.V [Mon, 11 Jul 2011 16:40:58 +0000 (16:40 +0000)]
fs/9p: Fid is not valid after a failed clunk.

free the fid even in case of failed clunk.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
13 years agonet/9p: Remove structure not used in the code
Aneesh Kumar K.V [Thu, 7 Jul 2011 08:44:03 +0000 (08:44 +0000)]
net/9p: Remove structure not used in the code

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
13 years agoVirtIO can transfer VIRTQUEUE_NUM of pages.
jvrao [Thu, 30 Jun 2011 23:18:41 +0000 (23:18 +0000)]
VirtIO can transfer VIRTQUEUE_NUM of pages.

Signed-off-by: Venkateswararao Jujjuri "<jvrao@linux.vnet.ibm.com>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
13 years agoFix the size of receive buffer packing onto VirtIO ring.
jvrao [Thu, 30 Jun 2011 23:18:39 +0000 (23:18 +0000)]
Fix the size of receive buffer packing onto VirtIO ring.

Signed-off-by: Venkateswararao Jujjuri "<jvrao@linux.vnet.ibm.com>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
13 years ago9p: clean up packet dump code
Eric Van Hensbergen [Sun, 19 Jun 2011 21:38:21 +0000 (16:38 -0500)]
9p: clean up packet dump code

Switch to generic kernel hexdump library and cleanup macros to
be more consistent with the way we do normal debug prints.

Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
13 years agofs/9p: remove rename work around in 9p
Aneesh Kumar K.V [Mon, 6 Jun 2011 18:01:47 +0000 (18:01 +0000)]
fs/9p: remove rename work around in 9p

Now that VFS does the right thing remove the work around.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
13 years agonet/9p: fix client code to fail more gracefully on protocol error
Eric Van Hensbergen [Thu, 14 Jul 2011 00:12:18 +0000 (19:12 -0500)]
net/9p: fix client code to fail more gracefully on protocol error

There was a BUG_ON to protect against a bad id which could be dealt with
more gracefully.

Reported-by: Natalie Orlin <norlin@us.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
13 years agoregulator: Convert tps65023 to use regmap API
Mark Brown [Sat, 18 Jun 2011 00:18:51 +0000 (01:18 +0100)]
regulator: Convert tps65023 to use regmap API

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@ti.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
13 years agoregmap: Add SPI bus support
Mark Brown [Thu, 12 May 2011 09:42:10 +0000 (11:42 +0200)]
regmap: Add SPI bus support

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@ti.com>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
13 years agoregmap: Add I2C bus support
Mark Brown [Mon, 20 Jun 2011 18:02:29 +0000 (19:02 +0100)]
regmap: Add I2C bus support

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@ti.com>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
13 years agoregmap: Add generic non-memory mapped register access API
Mark Brown [Wed, 11 May 2011 17:59:58 +0000 (19:59 +0200)]
regmap: Add generic non-memory mapped register access API

There are many places in the tree where we implement register access for
devices on non-memory mapped buses, especially I2C and SPI. Since hardware
designers seem to have settled on a relatively consistent set of register
interfaces this can be effectively factored out into shared code.  There
are a standard set of formats for marshalling data for exchange with the
device, with the actual I/O mechanisms generally being simple byte
streams.

We create an abstraction for marshaling data into formats which can be
sent on the control interfaces, and create a standard method for
plugging in actual transport underneath that.

This is mostly a refactoring and renaming of the bottom level of the
existing code for sharing register I/O which we have in ASoC. A
subsequent patch in this series converts ASoC to use this.  The main
difference in interface is that reads return values by writing to a
location provided by a pointer rather than in the return value, ensuring
we can use the full range of the type for register data.  We also use
unsigned types rather than ints for the same reason.

As some of the devices can have very large register maps the existing
ASoC code also contains infrastructure for managing register caches.
This cache work will be moved over in a future stage to allow for
separate review, the current patch only deals with the physical I/O.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@ti.com>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
13 years agovirtio: expose for non-virtualization users too
Ohad Ben-Cohen [Tue, 5 Jul 2011 14:06:14 +0000 (17:06 +0300)]
virtio: expose for non-virtualization users too

virtio has been so far used only in the context of virtualization,
and the virtio Kconfig was sourced directly by the relevant arch
Kconfigs when VIRTUALIZATION was selected.

Now that we start using virtio for inter-processor communications,
we need to source the virtio Kconfig outside of the virtualization
scope too.

Moreover, some architectures might use virtio for both virtualization
and inter-processor communications, so directly sourcing virtio
might yield unexpected results due to conflicting selections.

The simple solution offered by this patch is to always source virtio's
Kconfig in drivers/Kconfig, and remove it from the appropriate arch
Kconfigs. Additionally, a virtio menu entry has been added so virtio
drivers don't show up in the general drivers menu.

This way anyone can use virtio, though it's arguably less accessible
(and neat!) for virtualization users now.

Note: some architectures (mips and sh) seem to have a VIRTUALIZATION
menu merely for sourcing virtio's Kconfig, so that menu is removed too.

Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
13 years agoBlackfin: spi-docs: further clarify GPIO CS behavior with various modes
Mike Frysinger [Sat, 23 Jul 2011 03:10:11 +0000 (23:10 -0400)]
Blackfin: spi-docs: further clarify GPIO CS behavior with various modes

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
13 years agoBlackfin: boards: fix pcm device name
Scott Jiang [Tue, 5 Jul 2011 23:27:25 +0000 (19:27 -0400)]
Blackfin: boards: fix pcm device name

The pcm driver name has been changed, but the device name has not.

Signed-off-by: Scott Jiang <scott.jiang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
13 years agoBlackfin: SMP: punt unused atomic_test_mask helper
Mike Frysinger [Fri, 17 Jun 2011 21:30:29 +0000 (17:30 -0400)]
Blackfin: SMP: punt unused atomic_test_mask helper

No one uses this func, so just punt it.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
13 years agoBlackfin: irqs: do not trace arch_local_{*,irq_*} functions
Steven Rostedt [Sat, 2 Jul 2011 03:04:38 +0000 (23:04 -0400)]
Blackfin: irqs: do not trace arch_local_{*,irq_*} functions

Do not trace arch_local_save_flags(), arch_local_irq_*() and friends.
Although they are marked inline, gcc may still make a function out of
them and add it to the pool of functions that are traced by the function
tracer. This can cause undesirable results (kernel panic, triple faults,
etc).

Add the notrace notation to prevent them from ever being traced.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
13 years agoBlackfin: bf526: restrict reboot workaround to 0.0 silicon
Mike Frysinger [Thu, 30 Jun 2011 04:49:30 +0000 (00:49 -0400)]
Blackfin: bf526: restrict reboot workaround to 0.0 silicon

The bug in the BF526 rom when doing a software reset exists only in older
silicon versions, so don't clear SWRST on newer parts.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
13 years agoBlackfin: bf51x: fix alternative portmux options
Mike Frysinger [Wed, 29 Jun 2011 20:29:41 +0000 (16:29 -0400)]
Blackfin: bf51x: fix alternative portmux options

The BF51x's alternative portmux Kconfig options were copy & pasted from
the BF52x, but never tweaked to reflect it.  So drop the old options as
they were never used (and were simply wrong), and add the BF51x specific
pieces to the Kconfig and header.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
13 years agoBlackfin: bf54x: fix GPIO resume code
Mike Frysinger [Mon, 27 Jun 2011 21:23:48 +0000 (17:23 -0400)]
Blackfin: bf54x: fix GPIO resume code

Back in commit c03c2a87347b849ec927d, we fixed logic in the non-bf54x
GPIO resume code to set the data levels properly before the direction
to avoid spurious line glitches.  But we missed the bf54x code paths.
So add the same fix there.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
13 years agoBlackfin: dpmc: optimize SDRAM programming slightly
Mike Frysinger [Mon, 27 Jun 2011 19:46:40 +0000 (15:46 -0400)]
Blackfin: dpmc: optimize SDRAM programming slightly

No need to reload these registers constantly since they're always
available (we're not making any function calls in between).

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
13 years agoBlackfin: dpmc: don't save/restore scratch registers
Mike Frysinger [Mon, 27 Jun 2011 19:43:56 +0000 (15:43 -0400)]
Blackfin: dpmc: don't save/restore scratch registers

The Blackfin C ABI says we do not need to save/restore R0-R3 and P0-P2
as they are available as scratch registers.  So don't bother.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
13 years agoBlackfin: bf538: pull gpio/port logic out of core hibernate paths
Mike Frysinger [Mon, 27 Jun 2011 18:46:14 +0000 (14:46 -0400)]
Blackfin: bf538: pull gpio/port logic out of core hibernate paths

Re-architect how we save/restore the gpio/port logic that only pertains
to bf538/bf539 parts by pulling it out of the core code paths and pushing
it out to bf538-specific locations.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
13 years agoBlackfin: dpmc: optimize hibernate/resume path
Mike Frysinger [Mon, 27 Jun 2011 03:11:19 +0000 (23:11 -0400)]
Blackfin: dpmc: optimize hibernate/resume path

The current save logic used in hibernation is to do a MMR load (base +
offset) into a register, and then push that onto the stack.  Then when
restoring, pop off the stack into a register followed by a MMR store
(base + offset).  These use plenty of 32bit insns rather than 16bit,
are pretty long winded, and full of pipeline bubbles.

So, by taking advantage of MMRs that are contiguous, the multi-register
push/pop insn, and register abuse, we can shrink this code considerably.

When saving, the new logic does a lot of loads into the data and pointer
registers before executing a single multi-register push insn.  Then when
restoring, we do a single multi-register pop insn followed by a lot of
stores.  Overall, this allows us to cut the insn count by ~30%, the code
size by ~45%, and drastically reduce the register hazards that trigger
bubbles in the pipeline.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
13 years agoBlackfin: dpmc: do not save/restore EVT0/EVT1/EVT4 when hibernating
Mike Frysinger [Mon, 27 Jun 2011 06:57:44 +0000 (02:57 -0400)]
Blackfin: dpmc: do not save/restore EVT0/EVT1/EVT4 when hibernating

EVT0 is for emulation, EVT1 is for reset, and EVT4 is the "global int
disable" region.  None of these are used by software (or even hardware),
so don't bother saving/restoring them when we hibernate since nothing
ever uses these in Linux (the only thing they would be useful for is
core-memory scratch, but that's just crazy talk).

Signed-off-by: Mike Frysinger <vapier@gentoo.org>