linux-toradex.git/virt/kvm/irq_comm.c, branch v2.6.32.45

KVM: only clear irq_source_id if irqchip is present

2010-01-28T23:02:50+00:00

commit e50212bb51356f0df48d6cce0aae5acf41df336d upstream.

Otherwise kvm might attempt to dereference a NULL pointer.

Signed-off-by: Marcelo Tosatti 
Signed-off-by: Avi Kivity 
Signed-off-by: Greg Kroah-Hartman

KVM: fix lock imbalance in kvm_*_irq_source_id()

2010-01-28T23:02:49+00:00

commit 0c6ddcebd8303ada6faefa6f72ac18b6230320c4 upstream.

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 
Cc: Marcelo Tosatti 
Signed-off-by: Avi Kivity 
Signed-off-by: Greg Kroah-Hartman

KVM: fix irq_source_id size verification

2009-12-18T22:03:36+00:00

commit cd5a2685de4a642fd0bd763e8c19711ef08dbe27 upstream.

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" 
Signed-off-by: Marcelo Tosatti 
Signed-off-by: Greg Kroah-Hartman

KVM: Add trace points in irqchip code

2009-09-10T05:33:11+00:00

Add tracepoint in msi/ioapic/pic set_irq() functions,
in IPI sending and in the point where IRQ is placed into
apic's IRR.

Signed-off-by: Gleb Natapov 
Signed-off-by: Avi Kivity

KVM: ignore msi request if !level

2009-09-10T05:33:10+00:00

Irqfd sets level for interrupt to 1 and then to 0.
For MSI, check level so that a single message is sent.

Signed-off-by: Michael S. Tsirkin 
Signed-off-by: Avi Kivity

KVM: Trace irq level and source id

2009-09-10T05:33:06+00:00

Signed-off-by: Avi Kivity

KVM: convert custom marker based tracing to event traces

2009-09-10T05:32:59+00:00

This allows use of the powerful ftrace infrastructure.

See Documentation/trace/ for usage information.

[avi, stephen: various build fixes]
[sheng: fix control register breakage]

Signed-off-by: Marcelo Tosatti 
Signed-off-by: Stephen Rothwell 
Signed-off-by: Sheng Yang 
Signed-off-by: Avi Kivity

KVM: Use macro to iterate over vcpus.

2009-09-10T05:32:52+00:00

[christian: remove unused variables on s390]

Signed-off-by: Gleb Natapov 
Signed-off-by: Christian Borntraeger 
Signed-off-by: Avi Kivity

KVM: switch irq injection/acking data structures to irq_lock

2009-09-10T05:32:49+00:00

Protect irq injection/acking data structures with a separate irq_lock
mutex. This fixes the following deadlock:

CPU A                               CPU B
kvm_vm_ioctl_deassign_dev_irq()
  mutex_lock(&kvm->lock);            worker_thread()
  -> kvm_deassign_irq()                -> kvm_assigned_dev_interrupt_work_handler()
    -> deassign_host_irq()               mutex_lock(&kvm->lock);
      -> cancel_work_sync() [blocked]

[gleb: fix ia64 path]

Reported-by: Alex Williamson 
Signed-off-by: Marcelo Tosatti 
Signed-off-by: Gleb Natapov 
Signed-off-by: Avi Kivity

KVM: fix ack not being delivered when msi present

2009-08-05T11:03:43+00:00

kvm_notify_acked_irq does not check irq type, so that it sometimes
interprets msi vector as irq.  As a result, ack notifiers are not
called, which typially hangs the guest.  The fix is to track and
check irq type.

Signed-off-by: Michael S. Tsirkin 
Signed-off-by: Avi Kivity