9 years agoKVM: fix irq_source_id size verification
Marcelo Tosatti [Sun, 18 Oct 2009 01:47:23 +0000]
KVM: fix irq_source_id size verification

find_first_zero_bit works with bit numbers, not bytes.

Fixes

https://sourceforge.net/tracker/?func=detail&aid=2847560&group_id=180599&atid=893831

Reported-by: "Xu, Jiajun" <jiajun.xu@intel.com>
Cc: stable@kernel.org
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

9 years agoKVM: SVM: Cleanup NMI singlestep
Jan Kiszka [Sun, 18 Oct 2009 11:24:54 +0000]
KVM: SVM: Cleanup NMI singlestep

Push the NMI-related singlestep variable into vcpu_svm. It's dealing
with an AMD-specific deficit, nothing generic for x86.

Acked-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>

 arch/x86/include/asm/kvm_host.h |    1 -
 arch/x86/kvm/svm.c              |   12 +++++++-----
 2 files changed, 7 insertions(+), 6 deletions(-)
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

9 years agoKVM: x86: Fix guest single-stepping while interruptible
Jan Kiszka [Sun, 18 Oct 2009 11:24:44 +0000]
KVM: x86: Fix guest single-stepping while interruptible

Commit 705c5323 opened the doors of hell by unconditionally injecting
single-step flags as long as guest_debug signaled this. This doesn't
work when the guest branches into some interrupt or exception handler
and triggers a vmexit with flag reloading.

Fix it by saving cs:rip when user space requests single-stepping and
restricting the trace flag injection to this guest code position.

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

9 years agoKVM: Xen PV-on-HVM guest support
Ed Swierk [Thu, 15 Oct 2009 22:21:43 +0000]
KVM: Xen PV-on-HVM guest support

Support for Xen PV-on-HVM guests can be implemented almost entirely in
userspace, except for handling one annoying MSR that maps a Xen
hypercall blob into guest address space.

A generic mechanism to delegate MSR writes to userspace seems overkill
and risks encouraging similar MSR abuse in the future.  Thus this patch
adds special support for the Xen HVM MSR.

I implemented a new ioctl, KVM_XEN_HVM_CONFIG, that lets userspace tell
KVM which MSR the guest will write to, as well as the starting address
and size of the hypercall blobs (one each for 32-bit and 64-bit) that
userspace has loaded from files.  When the guest writes to the MSR, KVM
copies one page of the blob from userspace to the guest.

I've tested this patch with a hacked-up version of Gerd's userspace
code, booting a number of guests (CentOS 5.3 i386 and x86_64, and
FreeBSD 8.0-RC1 amd64) and exercising PV network and block devices.

[jan: fix i386 build warning]
[avi: future proof abi with a flags field]

Signed-off-by: Ed Swierk <eswierk@aristanetworks.com>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

9 years agoKVM: x86: Drop unneeded CONFIG_HAS_IOMEM check
Jan Kiszka [Mon, 12 Oct 2009 06:51:40 +0000]
KVM: x86: Drop unneeded CONFIG_HAS_IOMEM check

This (broken) check dates back to the days when this code was shared
across architectures. x86 has IOMEM, so drop it.

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

9 years agoKVM: VMX: fix handle_pause declaration
Marcelo Tosatti [Mon, 12 Oct 2009 22:37:31 +0000]
KVM: VMX: fix handle_pause declaration

There's no kvm_run argument anymore.

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

9 years agoKVM: x86: Harden against cpufreq
Zachary Amsden [Sat, 10 Oct 2009 02:26:08 +0000]
KVM: x86: Harden against cpufreq

If cpufreq can't determine the CPU khz, or cpufreq is not compiled in,
we should fallback to the measured TSC khz.

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

9 years agoKVM: SVM: Support Pause Filter in AMD processors
Mark Langsdorf [Tue, 6 Oct 2009 19:25:02 +0000]
KVM: SVM: Support Pause Filter in AMD processors

New AMD processors (Family 0x10 models 8+) support the Pause
Filter Feature.  This feature creates a new field in the VMCB
called Pause Filter Count.  If Pause Filter Count is greater
than 0 and intercepting PAUSEs is enabled, the processor will
increment an internal counter when a PAUSE instruction occurs
instead of intercepting.  When the internal counter reaches the
Pause Filter Count value, a PAUSE intercept will occur.

This feature can be used to detect contended spinlocks,
especially when the lock holding VCPU is not scheduled.
Rescheduling another VCPU prevents the VCPU seeking the
lock from wasting its quantum by spinning idly.

Experimental results show that most spinlocks are held
for less than 1000 PAUSE cycles or more than a few
thousand.  Default the Pause Filter Counter to 3000 to
detect the contended spinlocks.

Processor support for this feature is indicated by a CPUID
bit.

On a 24 core system running 4 guests each with 16 VCPUs,
this patch improved overall performance of each guest's
32 job kernbench by approximately 3-5% when combined
with a scheduler algorithm thati caused the VCPU to
sleep for a brief period. Further performance improvement
may be possible with a more sophisticated yield algorithm.

Signed-off-by: Mark Langsdorf <mark.langsdorf@amd.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

9 years agoKVM: VMX: Add support for Pause-Loop Exiting
Zhai, Edwin [Fri, 9 Oct 2009 10:03:20 +0000]
KVM: VMX: Add support for Pause-Loop Exiting

New NHM processors will support Pause-Loop Exiting by adding 2 VM-execution
control fields:
PLE_Gap    - upper bound on the amount of time between two successive
             executions of PAUSE in a loop.
PLE_Window - upper bound on the amount of time a guest is allowed to execute in
             a PAUSE loop

If the time, between this execution of PAUSE and previous one, exceeds the
PLE_Gap, processor consider this PAUSE belongs to a new loop.
Otherwise, processor determins the the total execution time of this loop(since
1st PAUSE in this loop), and triggers a VM exit if total time exceeds the
PLE_Window.
* Refer SDM volume 3b section 21.6.13 & 22.1.3.

Pause-Loop Exiting can be used to detect Lock-Holder Preemption, where one VP
is sched-out after hold a spinlock, then other VPs for same lock are sched-in
to waste the CPU time.

Our tests indicate that most spinlocks are held for less than 212 cycles.
Performance tests show that with 2X LP over-commitment we can get +2% perf
improvement for kernel build(Even more perf gain with more LPs).

Signed-off-by: Zhai Edwin <edwin.zhai@intel.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

9 years agoKVM: introduce kvm_vcpu_on_spin
Zhai, Edwin [Fri, 9 Oct 2009 10:03:20 +0000]
KVM: introduce kvm_vcpu_on_spin

Introduce kvm_vcpu_on_spin, to be used by VMX/SVM to yield processing
once the cpu detects pause-based looping.

Signed-off-by: "Zhai, Edwin" <edwin.zhai@intel.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

9 years agoKVM: SVM: Remove nsvm_printk debugging code
Joerg Roedel [Fri, 9 Oct 2009 14:08:33 +0000]
KVM: SVM: Remove nsvm_printk debugging code

With all important informations now delivered through
tracepoints we can savely remove the nsvm_printk debugging
code for nested svm.

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

9 years agoKVM: SVM: Add tracepoint for skinit instruction
Joerg Roedel [Fri, 9 Oct 2009 14:08:32 +0000]
KVM: SVM: Add tracepoint for skinit instruction

This patch adds a tracepoint for the event that the guest
executed the SKINIT instruction. This information is
important because SKINIT is an SVM extenstion not yet
implemented by nested SVM and we may need this information
for debugging hypervisors that do not yet run on nested SVM.

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

9 years agoKVM: SVM: Add tracepoint for invlpga instruction
Joerg Roedel [Fri, 9 Oct 2009 14:08:31 +0000]
KVM: SVM: Add tracepoint for invlpga instruction

This patch adds a tracepoint for the event that the guest
executed the INVLPGA instruction.

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

9 years agoKVM: SVM: Add tracepoint for #vmexit because intr pending
Joerg Roedel [Fri, 9 Oct 2009 14:08:30 +0000]
KVM: SVM: Add tracepoint for #vmexit because intr pending

This patch adds a special tracepoint for the event that a
nested #vmexit is injected because kvm wants to inject an
interrupt into the guest.

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

9 years agoKVM: SVM: Add tracepoint for injected #vmexit
Joerg Roedel [Fri, 9 Oct 2009 14:08:29 +0000]
KVM: SVM: Add tracepoint for injected #vmexit

This patch adds a tracepoint for a nested #vmexit that gets
re-injected to the guest.

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

9 years agoKVM: SVM: Add tracepoint for nested #vmexit
Joerg Roedel [Fri, 9 Oct 2009 14:08:28 +0000]
KVM: SVM: Add tracepoint for nested #vmexit

This patch adds a tracepoint for every #vmexit we get from a
nested guest.

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

9 years agoKVM: SVM: Add tracepoint for nested vmrun
Joerg Roedel [Fri, 9 Oct 2009 14:08:27 +0000]
KVM: SVM: Add tracepoint for nested vmrun

This patch adds a dedicated kvm tracepoint for a nested
vmrun.

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

9 years agoKVM: SVM: Move INTR vmexit out of atomic code
Joerg Roedel [Fri, 9 Oct 2009 14:08:26 +0000]
KVM: SVM: Move INTR vmexit out of atomic code

The nested SVM code emulates a #vmexit caused by a request
to open the irq window right in the request function. This
is a bug because the request function runs with preemption
and interrupts disabled but the #vmexit emulation might
sleep. This can cause a schedule()-while-atomic bug and is
fixed with this patch.

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

9 years agoKVM: SVM: Notify nested hypervisor of lost event injections
Alexander Graf [Fri, 9 Oct 2009 14:08:25 +0000]
KVM: SVM: Notify nested hypervisor of lost event injections

If event_inj is valid on a #vmexit the host CPU would write
the contents to exit_int_info, so the hypervisor knows that
the event wasn't injected.

We don't do this in nested SVM by now which is a bug and
fixed by this patch.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

9 years agoKVM: x86: include pvclock MSRs in msrs_to_save
Glauber Costa [Tue, 6 Oct 2009 17:24:50 +0000]
KVM: x86: include pvclock MSRs in msrs_to_save

For a while now, we are issuing a rdmsr instruction to find out which
msrs in our save list are really supported by the underlying machine.
However, it fails to account for kvm-specific msrs, such as the pvclock
ones.

This patch moves then to the beginning of the list, and skip testing them.

Cc: stable@kernel.org
Signed-off-by: Glauber Costa <glommer@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

9 years agoKVM: x86: Rework guest single-step flag injection and filtering
Jan Kiszka [Mon, 5 Oct 2009 11:07:21 +0000]
KVM: x86: Rework guest single-step flag injection and filtering

Push TF and RF injection and filtering on guest single-stepping into the
vender get/set_rflags callbacks. This makes the whole mechanism more
robust wrt user space IOCTL order and instruction emulations.

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

9 years agoKVM: x86: disable paravirt mmu reporting
Marcelo Tosatti [Thu, 1 Oct 2009 22:28:39 +0000]
KVM: x86: disable paravirt mmu reporting

Disable paravirt MMU capability reporting, so that new (or rebooted)
guests switch to native operation.

Paravirt MMU is a burden to maintain and does not bring significant
advantages compared to shadow anymore.

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

9 years agoKVM: x86: Refactor guest debug IOCTL handling
Jan Kiszka [Fri, 2 Oct 2009 22:31:21 +0000]
KVM: x86: Refactor guest debug IOCTL handling

Much of so far vendor-specific code for setting up guest debug can
actually be handled by the generic code. This also fixes a minor deficit
in the SVM part /wrt processing KVM_GUESTDBG_ENABLE.

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

9 years agoKVM: remove pre_task_link setting in save_state_to_tss16
Juan Quintela [Wed, 30 Sep 2009 15:39:07 +0000]
KVM: remove pre_task_link setting in save_state_to_tss16

Now, also remove pre_task_link setting in save_state_to_tss16.

  commit b237ac37a149e8b56436fabf093532483bff13b0
  Author: Gleb Natapov <gleb@redhat.com>
  Date:   Mon Mar 30 16:03:24 2009 +0300

    KVM: Fix task switch back link handling.

CC: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

9 years agoKVM: Fix hotplug of CPUs
Zachary Amsden [Tue, 29 Sep 2009 21:38:37 +0000]
KVM: Fix hotplug of CPUs

Both VMX and SVM require per-cpu memory allocation, which is done at module
init time, for only online cpus.

Backend was not allocating enough structure for all possible CPUs, so
new CPUs coming online could not be hardware enabled.

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

9 years agoKVM: Fix printk name error in svm.c
Zachary Amsden [Tue, 29 Sep 2009 21:38:36 +0000]
KVM: Fix printk name error in svm.c

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

9 years agoKVM: Kill the confusing tsc_ref_khz and ref_freq variables
Zachary Amsden [Tue, 29 Sep 2009 21:38:35 +0000]
KVM: Kill the confusing tsc_ref_khz and ref_freq variables

They are globals, not clearly protected by any ordering or locking, and
vulnerable to various startup races.

Instead, for variable TSC machines, register the cpufreq notifier and get
the TSC frequency directly from the cpufreq machinery.  Not only is it
always right, it is also perfectly accurate, as no error prone measurement
is required.

On such machines, when a new CPU online is brought online, it isn't clear what
frequency it will start with, and it may not correspond to the reference, thus
in hardware_enable we clear the cpu_tsc_khz variable to zero and make sure
it is set before running on a VCPU.

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

9 years agoKVM: Separate timer intialization into an indepedent function
Zachary Amsden [Tue, 29 Sep 2009 21:38:34 +0000]
KVM: Separate timer intialization into an indepedent function

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

9 years agoKVM: fix lock imbalance in kvm_*_irq_source_id()
Jiri Slaby [Fri, 25 Sep 2009 07:33:38 +0000]
KVM: fix lock imbalance in kvm_*_irq_source_id()

Stanse found 2 lock imbalances in kvm_request_irq_source_id and
kvm_free_irq_source_id. They omit to unlock kvm->irq_lock on fail paths.

Fix that by adding unlock labels at the end of the functions and jump
there from the fail paths.

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

9 years agoKVM: SVM: Remove remaining occurences of rdtscll
Joerg Roedel [Wed, 16 Sep 2009 13:24:19 +0000]
KVM: SVM: Remove remaining occurences of rdtscll

This patch replaces them with native_read_tsc() which can
also be used in expressions and saves a variable on the
stack in this case.

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

9 years agoKVM: SVM: don't copy exit_int_info on nested vmrun
Joerg Roedel [Wed, 16 Sep 2009 13:24:16 +0000]
KVM: SVM: don't copy exit_int_info on nested vmrun

The exit_int_info field is only written by the hardware and
never read. So it does not need to be copied on a vmrun
emulation.

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

9 years agoKVM: SVM: reorganize svm_interrupt_allowed
Joerg Roedel [Wed, 16 Sep 2009 13:24:15 +0000]
KVM: SVM: reorganize svm_interrupt_allowed

This patch reorganizes the logic in svm_interrupt_allowed to
make it better to read. This is important because the logic
is a lot more complicated with Nested SVM.

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

9 years agoKVM: remove duplicated #include
Huang Weiyi [Wed, 16 Sep 2009 13:09:39 +0000]
KVM: remove duplicated #include

Remove duplicated #include('s) in
  arch/x86/kvm/lapic.c

Signed-off-by: Huang Weiyi <weiyi.huang@gmail.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

9 years agoKVM: Activate Virtualization On Demand
Alexander Graf [Tue, 15 Sep 2009 09:37:46 +0000]
KVM: Activate Virtualization On Demand

X86 CPUs need to have some magic happening to enable the virtualization
extensions on them. This magic can result in unpleasant results for
users, like blocking other VMMs from working (vmx) or using invalid TLB
entries (svm).

Currently KVM activates virtualization when the respective kernel module
is loaded. This blocks us from autoloading KVM modules without breaking
other VMMs.

To circumvent this problem at least a bit, this patch introduces on
demand activation of virtualization. This means, that instead
virtualization is enabled on creation of the first virtual machine
and disabled on destruction of the last one.

So using this, KVM can be easily autoloaded, while keeping other
hypervisors usable.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

9 years agoKVM: SVM: remove needless mmap_sem acquision from nested_svm_map
Marcelo Tosatti [Tue, 8 Sep 2009 17:47:38 +0000]
KVM: SVM: remove needless mmap_sem acquision from nested_svm_map

nested_svm_map unnecessarily takes mmap_sem around gfn_to_page, since
gfn_to_page / get_user_pages are responsible for it.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Acked-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>

9 years agoKVM: VMX: Enhance invalid guest state emulation
Mohammed Gamal [Tue, 1 Sep 2009 10:48:18 +0000]
KVM: VMX: Enhance invalid guest state emulation

- Change returned handle_invalid_guest_state() to return relevant exit codes
- Move triggering the emulation from vmx_vcpu_run() to vmx_handle_exit()
- Return to userspace instead of repeatedly trying to emulate instructions that have already failed

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

9 years agoKVM: x86 emulator: Add pusha and popa instructions
Mohammed Gamal [Tue, 1 Sep 2009 13:28:11 +0000]
KVM: x86 emulator: Add pusha and popa instructions

This adds pusha and popa instructions (opcodes 0x60-0x61), this enables booting
MINIX with invalid guest state emulation on.

[marcelo: remove unused variable]

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

9 years agoKVM: x86 emulator: Add missing decoder flags for 'or' instructions
Mohammed Gamal [Fri, 28 Aug 2009 14:41:44 +0000]
KVM: x86 emulator: Add missing decoder flags for 'or' instructions

Add missing decoder flags for or instructions (0xc-0xd).

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

9 years agoKVM: Move assigned device code to own file
Avi Kivity [Wed, 26 Aug 2009 11:57:50 +0000]
KVM: Move assigned device code to own file

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

9 years agoKVM: Return -ENOTTY on unrecognized ioctls
Avi Kivity [Wed, 26 Aug 2009 11:57:07 +0000]
KVM: Return -ENOTTY on unrecognized ioctls

Not the incorrect -EINVAL.

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

9 years agoKVM: Drop kvm->irq_lock lock from irq injection path
Gleb Natapov [Mon, 24 Aug 2009 08:54:26 +0000]
KVM: Drop kvm->irq_lock lock from irq injection path

The only thing it protects now is interrupt injection into lapic and
this can work lockless. Even now with kvm->irq_lock in place access
to lapic is not entirely serialized since vcpu access doesn't take
kvm->irq_lock.

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

9 years agoKVM: Move IO APIC to its own lock
Gleb Natapov [Mon, 24 Aug 2009 08:54:25 +0000]
KVM: Move IO APIC to its own lock

The allows removal of irq_lock from the injection path.

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

9 years agoKVM: Convert irq notifiers lists to RCU locking
Gleb Natapov [Mon, 24 Aug 2009 08:54:24 +0000]
KVM: Convert irq notifiers lists to RCU locking

Use RCU locking for mask/ack notifiers lists.

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

9 years agoKVM: Move irq ack notifier list to arch independent code
Gleb Natapov [Mon, 24 Aug 2009 08:54:23 +0000]
KVM: Move irq ack notifier list to arch independent code

Mask irq notifier list is already there.

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

9 years agoKVM: Move irq routing data structure to rcu locking
Gleb Natapov [Mon, 24 Aug 2009 08:54:22 +0000]
KVM: Move irq routing data structure to rcu locking

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

9 years agoKVM: Maintain back mapping from irqchip/pin to gsi
Gleb Natapov [Mon, 24 Aug 2009 08:54:21 +0000]
KVM: Maintain back mapping from irqchip/pin to gsi

Maintain back mapping from irqchip/pin to gsi to speedup
interrupt acknowledgment notifications.

[avi: build fix on non-x86/ia64]

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

9 years agoKVM: Change irq routing table to use gsi indexed array
Gleb Natapov [Mon, 24 Aug 2009 08:54:20 +0000]
KVM: Change irq routing table to use gsi indexed array

Use gsi indexed array instead of scanning all entries on each interrupt
injection.

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

9 years agoKVM: Move irq sharing information to irqchip level
Gleb Natapov [Mon, 24 Aug 2009 08:54:19 +0000]
KVM: Move irq sharing information to irqchip level

This removes assumptions that max GSIs is smaller than number of pins.
Sharing is tracked on pin level not GSI level.

[avi: no PIC on ia64]

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

9 years agoKVM: Call pic_clear_isr() on pic reset to reuse logic there
Gleb Natapov [Mon, 24 Aug 2009 08:54:18 +0000]
KVM: Call pic_clear_isr() on pic reset to reuse logic there

Also move call of ack notifiers after pic state change.

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

9 years agoKVM: Don't pass kvm_run arguments
Avi Kivity [Mon, 24 Aug 2009 08:10:17 +0000]
KVM: Don't pass kvm_run arguments

They're just copies of vcpu->run, which is readily accessible.

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

9 years agoKVM: x86 emulator: Introduce No64 decode option
Mohammed Gamal [Sun, 23 Aug 2009 11:24:25 +0000]
KVM: x86 emulator: Introduce No64 decode option

Introduces a new decode option "No64", which is used for instructions that are
invalid in long mode.

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

9 years agoKVM: x86 emulator: Add 'push/pop sreg' instructions
Mohammed Gamal [Sun, 23 Aug 2009 11:24:24 +0000]
KVM: x86 emulator: Add 'push/pop sreg' instructions

[avi: avoid buffer overflow]

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

9 years agoKVM: Don't wrap schedule() with vcpu_put()/vcpu_load()
Avi Kivity [Sun, 23 Aug 2009 14:46:21 +0000]
KVM: Don't wrap schedule() with vcpu_put()/vcpu_load()

Preemption notifiers will do that for us automatically.

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

9 years agoMerge remote branch 'tip/x86/entry' into kvm-updates/2.6.33
Avi Kivity [Thu, 3 Dec 2009 07:30:06 +0000]
Merge remote branch 'tip/x86/entry' into kvm-updates/2.6.33

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

9 years agoLinux 2.6.32
Linus Torvalds [Thu, 3 Dec 2009 03:51:21 +0000]
Linux 2.6.32

9 years agoVIDEO: Correct use of request_region/request_mem_region
Julia Lawall [Sun, 9 Aug 2009 09:42:32 +0000]
VIDEO: Correct use of request_region/request_mem_region

request_region should be used with release_region, not request_mem_region.

Geert Uytterhoeven pointed out that in the case of drivers/video/gbefb.c,
the problem is actually the other way around; request_mem_region should be
used instead of request_region.

The semantic patch that finds/fixes this problem is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@r1@
expression start;
@@

request_region(start,...)

@b1@
expression r1.start;
@@

request_mem_region(start,...)

@depends on !b1@
expression r1.start;
expression E;
@@

- release_mem_region
+ release_region
  (start,E)
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

9 years agoSPI: spi_txx9: Fix bit rate calculation
Atsushi Nemoto [Thu, 3 Sep 2009 13:59:01 +0000]
SPI: spi_txx9: Fix bit rate calculation

TXx9 SPI bit rate is calculated by:
        fBR = (spi-baseclk) / (n + 1)
Fix calculation of min_speed_hz, max_speed_hz and n.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

9 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6
Linus Torvalds [Wed, 2 Dec 2009 23:41:49 +0000]
Merge branch 'for-linus' of git://git./linux/kernel/git/sameo/mfd-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6:
  mfd: Correct WM831X_MAX_ISEL_VALUE

9 years agoInput: i8042 - add Dell Vostro 1320, 1520 and 1720 to the reset list
Anisse Astier [Tue, 1 Dec 2009 09:14:25 +0000]
Input: i8042 - add Dell Vostro 1320, 1520 and 1720 to the reset list

These laptops often leave i8042 in a wierd state resulting in non-
operational touchpad and keyboard.

Signed-off-by: Anisse Astier <anisse@astier.eu>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

9 years agoMerge branch 'for-linus' of git://neil.brown.name/md
Linus Torvalds [Wed, 2 Dec 2009 23:40:37 +0000]
Merge branch 'for-linus' of git://neil.brown.name/md

* 'for-linus' of git://neil.brown.name/md:
  md: revert incorrect fix for read error handling in raid1.

9 years agoparam: don't complain about unused module parameters.
Rusty Russell [Tue, 1 Dec 2009 04:26:44 +0000]
param: don't complain about unused module parameters.

Jon confirms that recent modprobe will look in /proc/cmdline, so these
cmdline options can still be used.

See http://bugzilla.kernel.org/show_bug.cgi?id=14164

Reported-by: Adam Williamson <awilliam@redhat.com>
Cc: stable@kernel.org
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

9 years agoMerge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus
Linus Torvalds [Wed, 2 Dec 2009 23:39:20 +0000]
Merge branch 'upstream' of git://ftp.linux-mips.org/upstream-linus

* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus:
  MIPS: RB532: Fix devices.c compilation.
  MIPS: Fix MIPS I build.

9 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog
Linus Torvalds [Wed, 2 Dec 2009 23:38:49 +0000]
Merge git://git./linux/kernel/git/wim/linux-2.6-watchdog

* git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog:
  [PATCH] rc32434_wdt: fix compilation failure
  [WATCHDOG] rc32434_wdt.c: use resource_size()

9 years agomodules: don't export section names of empty sections via sysfs
Helge Deller [Wed, 2 Dec 2009 23:29:15 +0000]
modules: don't export section names of empty sections via sysfs

On the parisc architecture we face for each and every loaded kernel module
this kernel "badness warning":
  sysfs: cannot create duplicate filename '/module/ac97_bus/sections/.text'
  Badness at fs/sysfs/dir.c:487

Reason for that is, that on parisc all kernel modules do have multiple
.text sections due to the usage of the -ffunction-sections compiler flag
which is needed to reach all jump targets on this platform.

An objdump on such a kernel module gives:
Sections:
Idx Name          Size      VMA       LMA       File off  Algn
  0 .note.gnu.build-id 00000024  00000000  00000000  00000034  2**2
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
  1 .text         00000000  00000000  00000000  00000058  2**0
                  CONTENTS, ALLOC, LOAD, READONLY, CODE
  2 .text.ac97_bus_match 0000001c  00000000  00000000  00000058  2**2
                  CONTENTS, ALLOC, LOAD, READONLY, CODE
  3 .text         00000000  00000000  00000000  000000d4  2**0
                  CONTENTS, ALLOC, LOAD, READONLY, CODE
...
Since the .text sections are empty (size of 0 bytes) and won't be
loaded by the kernel module loader anyway, I don't see a reason
why such sections need to be listed under
/sys/module/<module_name>/sections/<section_name> either.

The attached patch does solve this issue by not exporting section
names which are empty.

This fixes bugzilla http://bugzilla.kernel.org/show_bug.cgi?id=14703

Signed-off-by: Helge Deller <deller@gmx.de>
CC: rusty@rustcorp.com.au
CC: akpm@linux-foundation.org
CC: James.Bottomley@HansenPartnership.com
CC: roland@redhat.com
CC: dave@hiauly1.hia.nrc.ca
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

9 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lrg/voltage-2.6
Linus Torvalds [Wed, 2 Dec 2009 20:44:42 +0000]
Merge branch 'for-linus' of git://git./linux/kernel/git/lrg/voltage-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lrg/voltage-2.6:
  regulator: Initialise wm831x structure pointor for ISINK driver

9 years agoregulator: Initialise wm831x structure pointor for ISINK driver
Mark Brown [Mon, 30 Nov 2009 14:01:56 +0000]
regulator: Initialise wm831x structure pointor for ISINK driver

The version that made it into mainline missed the initialisation of the
chip handle.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>

9 years agoMIPS: RB532: Fix devices.c compilation.
Florian Fainelli [Wed, 2 Dec 2009 12:07:01 +0000]
MIPS: RB532: Fix devices.c compilation.

We should now use dev_set_drvdata to set the driver driver_data field.

Signed-off-by: Florian Fainelli <florian@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/747/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

9 years agoMIPS: Fix MIPS I build.
Ralf Baechle [Wed, 2 Dec 2009 11:33:03 +0000]
MIPS: Fix MIPS I build.

Broken by d63c63e889bbeeaa461a8addf1245f89f3ce4ece (lmo) rsp.
f1e39a4a616cd9981a9decfd5332fd07a01abb8b (kernel.org).

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Patchwork: http://patchwork.linux-mips.org/patch/746/

9 years agoMerge branch 'fix' of git://git.kernel.org/pub/scm/linux/kernel/git/ycmiao/pxa-linux-2.6
Linus Torvalds [Wed, 2 Dec 2009 16:21:58 +0000]
Merge branch 'fix' of git://git./linux/kernel/git/ycmiao/pxa-linux-2.6

* 'fix' of git://git.kernel.org/pub/scm/linux/kernel/git/ycmiao/pxa-linux-2.6:
  [ARM] pxamci: call mmc_remove_host() before freeing resources

9 years ago[ARM] pxamci: call mmc_remove_host() before freeing resources
Daniel Mack [Tue, 1 Dec 2009 17:17:18 +0000]
[ARM] pxamci: call mmc_remove_host() before freeing resources

mmc_remove_host() will cause the mmc core to switch off the bus power by
eventually calling pxamci_set_ios(). This function uses the regulator or
the GPIO which have been freed already.

This causes the following Oops on module unload.

[   49.519649] Unable to handle kernel paging request at virtual address 30303a70
[   49.526878] pgd = c7084000
[   49.529563] [30303a70] *pgd=00000000
[   49.533136] Internal error: Oops: 5 [#1]
[   49.537025] last sysfs file: /sys/devices/platform/pxa27x-ohci/usb1/1-1/1-1:1.0/host0/target0:0:0/0:0:0:0/scsi_level
[   49.547471] Modules linked in: pxamci(-) eeti_ts
[   49.552061] CPU: 0    Not tainted  (2.6.32-rc8 #322)
[   49.557001] PC is at regulator_is_enabled+0x3c/0xbc
[   49.561846] LR is at regulator_is_enabled+0x30/0xbc
[   49.566691] pc : [<c01a2448>]    lr : [<c01a243c>]    psr: 60000013
[   49.566702] sp : c7083e70  ip : 30303a30  fp : 00000000
[   49.578093] r10: c705e200  r9 : c7082000  r8 : c705e2e0
[   49.583280] r7 : c7061340  r6 : c7061340  r5 : c7083e70  r4 : 00000000
[   49.589759] r3 : c04dc434  r2 : c04dc434  r1 : c03eecea  r0 : 00000047
[   49.596241] Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment user
[   49.603329] Control: 0000397f  Table: a7084018  DAC: 00000015
[   49.609031] Process rmmod (pid: 1101, stack limit = 0xc7082278)
[   49.614908] Stack: (0xc7083e70 to 0xc7084000)
[   49.619238] 3e60:                                     c7082000 c703c4f8 c705ea00 c04f4074
[   49.627366] 3e80: 00000000 c705e3a0 ffffffff c0247ddc c70361a0 00000000 c705e3a0 ffffffff
[   49.635499] 3ea0: c705e200 bf006400 c78c4f00 c705e200 c705e3a0 ffffffff c705e200 ffffffff
[   49.643633] 3ec0: c04d8ac8 c02476d0 ffffffff c0247c60 c705e200 c0248678 c705e200 c0249064
[   49.651765] 3ee0: ffffffff bf006204 c04d8ad0 c04d8ad0 c04d8ac8 bf007490 00000880 c00440c4
[   49.659898] 3f00: 0000b748 c01c5708 bf007490 c01c44c8 c04d8ac8 c04d8afc bf007490 c01c4570
[   49.668031] 3f20: bf007490 bf00750c c04f4258 c01c37a4 00000000 bf00750c c7083f44 c007b014
[   49.676162] 3f40: 4000d000 6d617870 08006963 00000001 00000000 c7085000 00000001 00000000
[   49.684287] 3f60: 4000d000 c7083f8c 00000001 bea01a54 00005401 c7ab1400 c00440c4 00082000
[   49.692420] 3f80: bf00750c 00000880 c7083f8c 00000000 4000cfa8 00000000 00000880 bea01cc8
[   49.700552] 3fa0: 00000081 c0043f40 00000000 00000880 bea01cc8 00000880 00000006 00000000
[   49.708677] 3fc0: 00000000 00000880 bea01cc8 00000081 00000097 0000cca4 0000b748 00000000
[   49.716802] 3fe0: 4001a4f0 bea01cc0 00018bf4 4001a4fc 20000010 bea01cc8 a063e021 a063e421
[   49.724958] [<c01a2448>] (regulator_is_enabled+0x3c/0xbc) from [<c0247ddc>] (mmc_regulator_set_ocr+0x14/0xd8)
[   49.734836] [<c0247ddc>] (mmc_regulator_set_ocr+0x14/0xd8) from [<bf006400>] (pxamci_set_ios+0xd8/0x17c [pxamci])
[   49.745044] [<bf006400>] (pxamci_set_ios+0xd8/0x17c [pxamci]) from [<c02476d0>] (mmc_power_off+0x50/0x58)
[   49.754555] [<c02476d0>] (mmc_power_off+0x50/0x58) from [<c0247c60>] (mmc_detach_bus+0x68/0xc4)
[   49.763207] [<c0247c60>] (mmc_detach_bus+0x68/0xc4) from [<c0248678>] (mmc_stop_host+0xd4/0x1bc)
[   49.771944] [<c0248678>] (mmc_stop_host+0xd4/0x1bc) from [<c0249064>] (mmc_remove_host+0xc/0x20)
[   49.780681] [<c0249064>] (mmc_remove_host+0xc/0x20) from [<bf006204>] (pxamci_remove+0xc8/0x174 [pxamci])
[   49.790211] [<bf006204>] (pxamci_remove+0xc8/0x174 [pxamci]) from [<c01c5708>] (platform_drv_remove+0x1c/0x24)
[   49.800164] [<c01c5708>] (platform_drv_remove+0x1c/0x24) from [<c01c44c8>] (__device_release_driver+0x7c/0xc4)
[   49.810110] [<c01c44c8>] (__device_release_driver+0x7c/0xc4) from [<c01c4570>] (driver_detach+0x60/0x8c)
[   49.819535] [<c01c4570>] (driver_detach+0x60/0x8c) from [<c01c37a4>] (bus_remove_driver+0x90/0xcc)
[   49.828452] [<c01c37a4>] (bus_remove_driver+0x90/0xcc) from [<c007b014>] (sys_delete_module+0x1d8/0x254)
[   49.837891] [<c007b014>] (sys_delete_module+0x1d8/0x254) from [<c0043f40>] (ret_fast_syscall+0x0/0x28)
[   49.847145] Code: eb06c53a e596c030 e1a0500d e59f106c (e59c0040)
[   49.853566] ---[ end trace b5fa66a00cea142f ]---

Signed-off-by: Daniel Mack <daniel@caiaq.de>
Reported-by: Sven Neumann <s.neumann@raumfeld.com>
Cc: Pierre Ossman <pierre@ossman.eu>
Cc: linux-mmc@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: stable@kernel.org
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>

9 years ago[PATCH] rc32434_wdt: fix compilation failure
Florian Fainelli [Wed, 2 Dec 2009 12:21:23 +0000]
[PATCH] rc32434_wdt: fix compilation failure

This patch fixes the compilation failure of
rc32434 due to a bad module parameter description.

Signed-off-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

9 years ago[WATCHDOG] rc32434_wdt.c: use resource_size()
H Hartley Sweeten [Wed, 25 Nov 2009 02:06:26 +0000]
[WATCHDOG] rc32434_wdt.c: use resource_size()

The size value passed to ioremap_nocache() is not correct.
Use resource_size() to get the correct value.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Phil Sutter <n0-1@freewrt.org>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

9 years agosysfs: fix SYSFS_DEPRECATED_V2 prompt
Randy Dunlap [Tue, 1 Dec 2009 21:17:50 +0000]
sysfs: fix SYSFS_DEPRECATED_V2 prompt

The SYSFS_DEPRECATED_V2 says "remove" older, deprecated features, but it
actually enables them, so correct this confusing, backwards text.

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Kay Sievers <kay.sievers@vrfy.org>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

9 years agortc-x1205: reset clock to sane state after power failure
Johannes Weiner [Tue, 1 Dec 2009 21:17:49 +0000]
rtc-x1205: reset clock to sane state after power failure

When detecting power failure, the probe function would reset the clock
time to defined state.

However, the clock's _date_ might still be bogus and a subsequent probe
fails when sanity-checking these values.

Change the power-failure fixup code to do a full setting of rtc_time,
including a valid date.

Signed-off-by: Johannes Weiner <jw@emlix.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Paul Gortmaker <p_gortmaker@yahoo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

9 years agortc-x1205: fix rtc_time to y2k register value conversion
Johannes Weiner [Tue, 1 Dec 2009 21:17:48 +0000]
rtc-x1205: fix rtc_time to y2k register value conversion

The possible CCR_Y2K register values are 19 or 20 and struct rtc_time's
tm_year is in years since 1900.

The function translating rtc_time to register values assumes tm_year to be
years since first christmas, though, and we end up storing 0 or 1 in the
CCR_Y2K register, which the hardware does not refuse to do.

A subsequent probing of the clock fails due to the invalid value range in
the register, though.

[ And if it didn't, reading the clock would yield a bogus year because
  the function translating registers to tm_year is assuming a register
  value of 19 or 20. ]

This fixes the conversion from years since 1900 in tm_year to the
corresponding CCR_Y2K value of 19 or 20.

Signed-off-by: Johannes Weiner <jw@emlix.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Paul Gortmaker <p_gortmaker@yahoo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

9 years agoaoe: prevent cache aliases
Peter Horton [Tue, 1 Dec 2009 21:17:46 +0000]
aoe: prevent cache aliases

Prevent the AoE block driver from creating cache aliases of page cache
pages on machines with virtually indexed caches.

Building kernels on an AT91SAM9G20 board without this patch fails with
segmentation faults after a couple of passes.

Signed-off-by: Peter Horton <zero@colonel-panic.org>
Cc: "Ed L. Cashin" <ecashin@coraid.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

9 years agogpio: Langwell GPIO driver bugfixes
Alek Du [Tue, 1 Dec 2009 21:17:45 +0000]
gpio: Langwell GPIO driver bugfixes

- Remove wrong and unnecessary unmask operation

- Remove extra GEDR reading

This fixes the loss of interrupts which occurs when two or more pins are
triggered in close succession.

Signed-off-by: Alek Du <alek.du@intel.com>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

9 years agokbuild: stepping down as maintainer
Sam Ravnborg [Tue, 1 Dec 2009 21:17:44 +0000]
kbuild: stepping down as maintainer

It has been fun but the last year or more it has been a duty and a burden.
So I leave it open for others to take over.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Anibal Monsalve Salazar <anibal@debian.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Michal Marek <mmarek@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

9 years agodavinci: fb: fix frame buffer driver issues
Sudhakar Rajashekhara [Tue, 1 Dec 2009 21:17:43 +0000]
davinci: fb: fix frame buffer driver issues

Following issues have been addressed on DA8XX/OMAP-L1XX:

a. Screen misalignment during booting when frame buffer console is
   enabled.

b. Driver was configured always in PSEUDOCOLOR mode.  This patch
   dynamically configures the driver either in PSEUDOCOLOUR or TRUECOLOR
   mode depending on bpp.

c. The RED and BLUE offsets were interchanged resulting in wrong
   bootup logo colour.

This patch has been tested on DA830/OMAP-L137 and DA850/OMAP-L138 EVMs.

Signed-off-by: Sudhakar Rajashekhara <sudhakar.raj@ti.com>
Cc: Steve Chen <schen@mvista.com>
Cc: Pavel Kiryukhin <pkiryukhin@ru.mvista.com>
Cc: Krzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

9 years agodrivers/rtc/rtc-pcf50633.c: fix use after free in pcf50633_rtc_probe()
Dan Carpenter [Tue, 1 Dec 2009 21:17:41 +0000]
drivers/rtc/rtc-pcf50633.c: fix use after free in pcf50633_rtc_probe()

"rtc" is freed and then dereferenced on the next line.  This patch fixes
that.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Acked-by: Alessandro Zummo <a.zummo@towertech.it>
Cc: David Brownell <david-b@pacbell.net>
Cc: Paul Gortmaker <p_gortmaker@yahoo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

9 years agodrivers/media/dvb/dvb-core/dvb_frontend.c: needs semaphore.h
Andrew Morton [Tue, 1 Dec 2009 21:17:41 +0000]
drivers/media/dvb/dvb-core/dvb_frontend.c: needs semaphore.h

Fixes:

  v4l/dvb_frontend.c: In function 'dvb_frontend_stop':
  v4l/dvb_frontend.c:707: error: implicit declaration of function 'init_MUTEX'

Addresses http://bugzilla.kernel.org/show_bug.cgi?id=14609

Reported-by: <tstrelar@gmail.com>
Cc: Mauro Carvalho Chehab <mchehab@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

9 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6
Linus Torvalds [Tue, 1 Dec 2009 18:41:40 +0000]
Merge git://git./linux/kernel/git/gregkh/staging-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6:
  Staging: update TODO files
  Staging: hv: Fix some missing author names
  Staging: hv: Fix vmbus event handler bug
  Staging: hv: Fix argument order in incorrect memset invocations in hyperv driver.

9 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6
Linus Torvalds [Tue, 1 Dec 2009 18:41:05 +0000]
Merge git://git./linux/kernel/git/gregkh/usb-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6:
  USB: Add support for Mobilcom Debitel USB UMTS Surf-Stick to option driver
  USB: work around for EHCI with quirky periodic schedules
  USB: musb: Fix CPPI IRQs not being signaled
  USB: musb: respect usb_request->zero in control requests
  USB: musb: fix ISOC Tx programming for CPPI DMAs
  USB: musb: Remove unwanted message in boot log
  usb: amd5536udc: fixed shared interrupt bug and warning oops
  USB: ftdi_sio: Keep going when write errors are encountered.
  USB: musb_gadget: fix STALL handling
  USB: EHCI: don't send Clear-TT-Buffer following a STALL

9 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6
Linus Torvalds [Tue, 1 Dec 2009 18:40:51 +0000]
Merge git://git./linux/kernel/git/gregkh/tty-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6:
  tty/of_serial: add missing ns16550a id
  bcm63xx_uart: Fix serial driver compile breakage.
  tty_port: handle the nonblocking open of a dead port corner case

9 years agoMerge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus
Linus Torvalds [Tue, 1 Dec 2009 16:26:44 +0000]
Merge branch 'upstream' of git://ftp.linux-mips.org/upstream-linus

* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus:
  MIPS: Loongson: Switch from flatmem to sparsemem
  MIPS: Loongson: Disallow 4kB pages
  MIPS: Add missing definition for MADV_HWPOISON.
  MIPS: Fix build error if __xchg() is not getting inlined.
  MIPS: IP22/IP28 Disable early printk to fix boot problems on some systems.

9 years agoMIPS: Loongson: Switch from flatmem to sparsemem
Wu Zhangjin [Tue, 1 Dec 2009 06:55:42 +0000]
MIPS: Loongson: Switch from flatmem to sparsemem

With flatmem hibernation for Loongson will fail, and there are also some
other problems such as broken files when using NFS or CIFS / Samba.

The config help of sparsemem says:

"This option provides some potential performance benefits, along with
decreased code complexity."

So to avoid the potential problems of FLATMEM, we disable FLATMEM directly
and use SPARSEMEM instead.

Related email thread:

http://groups.google.com/group/loongson-dev/browse_thread/thread/b6b65890ec2b0f24/feb43e5aa7f55d9b?show_docid=feb43e5aa7f55d9b

Reported-by: Tatu Kilappa <tatu.kilappa@gmail.com>
Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
Patchwork: http://patchwork.linux-mips.org/patch/737/
Cc: linux-mips@linux-mips.org
Cc: zhangfx@lemote.com
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

9 years agoMIPS: Loongson: Disallow 4kB pages
Wu Zhangjin [Tue, 1 Dec 2009 06:55:25 +0000]
MIPS: Loongson: Disallow 4kB pages

Currently, with PAGE_SIZE_4KB, the kernel for loongson will hang on:

Kernel panic - not syncing: Attempted to kill init!

The possible reason is the cache aliases problem:

Loongson 2F has 64kb, 4 way L1 Cache, the way size is 16kb, which is bigger
then 4kb. so, If using 4kb page size, there is cache aliases problem.
To avoid this kind of problem, extra cache flushing.  The 2nd possible
solution is 16kb page size which avoids cache aliases without the need for
extra cache flushes.  So we disable 4kB pages until the aliasing issue is
solved.

Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
Patchwork: http://patchwork.linux-mips.org/patch/736/
Cc: linux-mips@linux-mips.org
Cc: zhangfx@lemote.com
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

9 years agoMIPS: Add missing definition for MADV_HWPOISON.
Ralf Baechle [Thu, 26 Nov 2009 18:28:42 +0000]
MIPS: Add missing definition for MADV_HWPOISON.

Thanks to Joseph S. Myers for reporting this.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Cc: "Joseph S. Myers" <joseph@codesourcery.com>
Patchwork: http://patchwork.linux-mips.org/patch/723/

9 years agoMIPS: Fix build error if __xchg() is not getting inlined.
Ralf Baechle [Tue, 24 Nov 2009 13:16:02 +0000]
MIPS: Fix build error if __xchg() is not getting inlined.

If __xchg() is not getting inlined the outline version of the function
will have a reference to __xchg_called_with_bad_pointer() which does not
exist remaining.  Fixed by using BUILD_BUG_ON() to check for allowable
operand sizes.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Patchwork: http://patchwork.linux-mips.org/patch/705/

9 years agoMIPS: IP22/IP28 Disable early printk to fix boot problems on some systems.
Martin Michlmayr [Thu, 19 Nov 2009 16:40:09 +0000]
MIPS: IP22/IP28 Disable early printk to fix boot problems on some systems.

Some Debian users have reported that the kernel hangs early during boot on
some IP22 systems.  Thomas Bogendoerfer found that this is due to a "bad
interaction between CONFIG_EARLY_PRINTK and overwritten prom memory during
early boot".  Since there's no fix yet, disable CONFIG_EARLY_PRINTK for now.

Signed-off-by: Martin Michlmayr <tbm@cyrius.com>
Cc: linux-mips@linux-mips.org
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Dmitri Vorobiev <dmitri.vorobiev@gmail.com>
Patchwork: http://patchwork.linux-mips.org/patch/702/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

9 years agoSLOW_WORK: Move slow_work's proc file to debugfs
David Howells [Tue, 1 Dec 2009 15:36:11 +0000]
SLOW_WORK: Move slow_work's proc file to debugfs

Move slow_work's debugging proc file to debugfs.

Signed-off-by: David Howells <dhowells@redhat.com>
Requested-and-acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

9 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mattst88...
Linus Torvalds [Tue, 1 Dec 2009 15:36:23 +0000]
Merge branch 'for-linus' of git://git./linux/kernel/git/mattst88/alpha-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mattst88/alpha-2.6:
  alpha: Fixup last users of irq_chip->typename
  Alpha: Rearrange thread info flags fixing two regressions
  arch/alpha/kernel: Add kmalloc NULL tests
  arch/alpha/kernel/sys_ruffian.c: Use DIV_ROUND_CLOSEST

9 years agoCacheFiles: Update IMA counters when using dentry_open
Marc Dionne [Tue, 1 Dec 2009 14:09:24 +0000]
CacheFiles: Update IMA counters when using dentry_open

When IMA is active, using dentry_open without updating the
IMA counters will result in free/open imbalance errors when
fput is eventually called.

Signed-off-by: Marc Dionne <marc.c.dionne@gmail.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

9 years agoSLOW_WORK: Fix the CONFIG_MODULES=n case
David Howells [Tue, 1 Dec 2009 13:52:08 +0000]
SLOW_WORK: Fix the CONFIG_MODULES=n case

Commits 3d7a641 ("SLOW_WORK: Wait for outstanding work items belonging to a
module to clear") introduced some code to make sure that all of a module's
slow-work items were complete before that module was removed, and commit
3bde31a ("SLOW_WORK: Allow a requeueable work item to sleep till the thread is
needed") further extended that, breaking it in the process if CONFIG_MODULES=n:

CC kernel/slow-work.o
  kernel/slow-work.c: In function 'slow_work_execute':
  kernel/slow-work.c:313: error: 'slow_work_thread_processing' undeclared (first use in this function)
  kernel/slow-work.c:313: error: (Each undeclared identifier is reported only once
  kernel/slow-work.c:313: error: for each function it appears in.)
  kernel/slow-work.c: In function 'slow_work_wait_for_items':
  kernel/slow-work.c:950: error: 'slow_work_unreg_sync_lock' undeclared (first use in this function)
  kernel/slow-work.c:951: error: 'slow_work_unreg_wq' undeclared (first use in this function)
  kernel/slow-work.c:961: error: 'slow_work_unreg_work_item' undeclared (first use in this function)
  kernel/slow-work.c:974: error: 'slow_work_unreg_module' undeclared (first use in this function)
  kernel/slow-work.c:977: error: 'slow_work_thread_processing' undeclared (first use in this function)
  make[1]: *** [kernel/slow-work.o] Error 1

Fix this by:

 (1) Extracting the bits of slow_work_execute() that are contingent on
     CONFIG_MODULES, and the bits that should be, into inline functions and
     placing them into the #ifdef'd section that defines the relevant variables
     and adding stubs for moduleless kernels.  This allows the removal of some
     #ifdefs.

 (2) #ifdef'ing out the contents of slow_work_wait_for_items() in moduleless
     kernels.

The four functions related to handling module unloading synchronisation (and
their associated variables) could be offloaded into a separate .c file, but
each function is only used once and three of them are tiny, so doing so would
prevent them from being inlined.

Reported-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

9 years ago9p: fix build breakage introduced by FS-Cache
David Howells [Tue, 1 Dec 2009 13:38:45 +0000]
9p: fix build breakage introduced by FS-Cache

While building 2.6.32-rc8-git2 for Fedora I noticed the following thinko
in commit 201a15428bd54f83eccec8b7c64a04b8f9431204 ("FS-Cache: Handle
pages pending storage that get evicted under OOM conditions"):

  fs/9p/cache.c: In function '__v9fs_fscache_release_page':
  fs/9p/cache.c:346: error: 'vnode' undeclared (first use in this function)
  fs/9p/cache.c:346: error: (Each undeclared identifier is reported only once
  fs/9p/cache.c:346: error: for each function it appears in.)
  make[2]: *** [fs/9p/cache.o] Error 1

Fix the 9P filesystem to correctly construct the argument to
fscache_maybe_release_page().

Signed-off-by: Kyle McMartin <kyle@redhat.com>
Signed-off-by: Xiaotian Feng <dfeng@redhat.com> [from identical patch]
Signed-off-by: Stefan Lippers-Hollmann <s.l-h@gmx.de> [from identical patch]
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

9 years agomfd: Correct WM831X_MAX_ISEL_VALUE
Mark Brown [Mon, 30 Nov 2009 13:24:18 +0000]
mfd: Correct WM831X_MAX_ISEL_VALUE

There was confusion between the array size and the highest ISEL
value possible.

Reported-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

9 years agomd: revert incorrect fix for read error handling in raid1.
NeilBrown [Tue, 1 Dec 2009 06:30:59 +0000]
md: revert incorrect fix for read error handling in raid1.

commit 4706b349f was a forward port of a fix that was needed
for SLES10.  But in fact it is not needed in mainline because
the earlier commit dd00a99e7a fixes the same problem in a
better way.
Further, this commit introduces a bug in the way it interacts with
the automatic read-error-correction.  If, after a read error is
successfully corrected, the same disk is chosen to re-read - the
re-read won't be attempted but an error will be returned instead.

After reverting that commit, there is the possibility that a
read error on a read-only array (where read errors cannot
be corrected as that requires a write) will repeatedly read the same
device and continue to get an error.
So in the "Array is readonly" case, fail the drive immediately on
a read error.

Signed-off-by: NeilBrown <neilb@suse.de>
Cc: stable@kernel.org

9 years agoalpha: Fixup last users of irq_chip->typename
Thomas Gleixner [Tue, 1 Dec 2009 03:51:31 +0000]
alpha: Fixup last users of irq_chip->typename

The typename member of struct irq_chip was kept for migration purposes
and is obsolete since more than 2 years. Fix up the leftovers.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Richard Henderson <rth@twiddle.net>
Cc: linux-alpha@vger.kernel.org
Signed-off-by: Matt Turner <mattst88@gmail.com>

9 years agoAlpha: Rearrange thread info flags fixing two regressions
Michael Cree [Tue, 1 Dec 2009 03:44:40 +0000]
Alpha: Rearrange thread info flags fixing two regressions

The removal of the TIF_NOTIFY_RESUME flag, commit a583f1b54249b
"remove unused TIF_NOTIFY_RESUME flag," resulted in incorrect
setting of the unaligned access control flags by the prctl syscall.

The re-addition of the TIF_NOTIFY_RESUME flag, commit d0420c83f39f
"KEYS: Extend TIF_NOTIFY_RESUME to (almost) all architectures [try #6]"
further caused problems, namely incorrect operands to assembler code
as evidenced by:

AS      arch/alpha/kernel/entry.o
arch/alpha/kernel/entry.S: Assembler messages:
arch/alpha/kernel/entry.S:326: Warning: operand out of range
(0x0000000000000406 is not between 0x0000000000000000 and
0x00000000000000ff)

Both regressions fixed by (1) rearranging TIF_NOTIFY_RESUME flag to be
in lower 8 bits of the thread info flags, and (2) making sure that
ALPHA_UAC_SHIFT matches the rearrangement of the thread info flags.

Signed-off-by: Michael Cree <mcree@orcon.net.nz>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: David Howells <dhowells@redhat.com>,
Signed-off-by: Matt Turner <mattst88@gmail.com>

9 years agoMerge branch 'security' of git://git.kernel.org/pub/scm/linux/kernel/git/linville...
Linus Torvalds [Tue, 1 Dec 2009 00:47:16 +0000]
Merge branch 'security' of git://git./linux/kernel/git/linville/wireless-2.6

* 'security' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6:
  mac80211: fix spurious delBA handling
  mac80211: fix two remote exploits