linux.git/virt/kvm/assigned-dev.c, branch master

kvm: x86: move assigned-dev.c and iommu.c to arch/x86/

2014-11-23T17:33:36+00:00

Now that ia64 is gone, we can hide deprecated device assignment in x86.

Notable changes:
 - kvm_vm_ioctl_assigned_device() was moved to x86/kvm_arch_vm_ioctl()

The easy parts were removed from generic kvm code, remaining
 - kvm_iommu_(un)map_pages() would require new code to be moved
 - struct kvm_assigned_dev_kernel depends on struct kvm_irq_ack_notifier

Signed-off-by: Radim Krčmář 
Signed-off-by: Paolo Bonzini

KVM: Use PCI device flag helper functions

2014-09-16T22:18:40+00:00

Use PCI device flag helper functions when assigning or releasing device.
No functional change.

Signed-off-by: Ethan Zhao 
Signed-off-by: Bjorn Helgaas 
Acked-by: Paolo Bonzini

virt/kvm/assigned-dev.c: Set 'dev->irq_source_id' to '-1' after free it

2014-08-19T13:12:28+00:00

As a generic function, deassign_guest_irq() assumes it can be called
even if assign_guest_irq() is not be called successfully (which can be
triggered by ioctl from user mode, indirectly).

So for assign_guest_irq() failure process, need set 'dev->irq_source_id'
to -1 after free 'dev->irq_source_id', or deassign_guest_irq() may free
it again.

Signed-off-by: Chen Gang 
Signed-off-by: Paolo Bonzini

kvm: Use pci_enable_msix_exact() instead of pci_enable_msix()

2014-04-28T09:13:06+00:00

As result of deprecation of MSI-X/MSI enablement functions
pci_enable_msix() and pci_enable_msi_block() all drivers
using these two interfaces need to be updated to use the
new pci_enable_msi_range()  or pci_enable_msi_exact()
and pci_enable_msix_range() or pci_enable_msix_exact()
interfaces.

Signed-off-by: Alexander Gordeev 
Cc: Gleb Natapov 
Cc: Paolo Bonzini 
Cc: kvm@vger.kernel.org
Cc: linux-pci@vger.kernel.org
Signed-off-by: Paolo Bonzini

KVM: Move irq routing to generic code

2013-04-26T18:27:17+00:00

The IRQ routing set ioctl lives in the hacky device assignment code inside
of KVM today. This is definitely the wrong place for it. Move it to the much
more natural kvm_main.c.

Signed-off-by: Alexander Graf 
Acked-by: Michael S. Tsirkin

KVM: Let ioapic know the irq line status

2013-04-16T02:20:34+00:00

Userspace may deliver RTC interrupt without query the status. So we
want to track RTC EOI for this case.

Signed-off-by: Yang Zhang 
Reviewed-by: Gleb Natapov 
Signed-off-by: Marcelo Tosatti

kvm: deliver msi interrupts from irq handler

2012-12-05T13:10:53+00:00

We can deliver certain interrupts, notably MSI,
from atomic context.  Use kvm_set_irq_inatomic,
to implement an irq handler for msi.

This reduces the pressure on scheduler in case
where host and guest irq share a host cpu.

Signed-off-by: Michael S. Tsirkin 
Signed-off-by: Gleb Natapov

KVM: Fix device assignment threaded irq handler

2012-07-11T10:01:48+00:00

The kernel no longer allows us to pass NULL for the hard handler
without also specifying IRQF_ONESHOT.  IRQF_ONESHOT imposes latency
in the exit path that we don't need for MSI interrupts.  Long term
we'd like to inject these interrupts from the hard handler when
possible.  In the short term, we can create dummy hard handlers
that return us to the previous behavior.  Credit to Michael for
original patch.

Fixes: https://bugzilla.kernel.org/show_bug.cgi?id=43328

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

KVM: Fix PCI header check on device assignment

2012-06-16T02:22:12+00:00

The masking was wrong (must have been 0x7f), and there is no need to
re-read the value as pci_setup_device already does this for us.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=43339
Signed-off-by: Jan Kiszka 
Acked-by: Alex Williamson 
Signed-off-by: Marcelo Tosatti

KVM: Convert intx_mask_lock to spin lock

2012-03-20T10:41:24+00:00

As kvm_notify_acked_irq calls kvm_assigned_dev_ack_irq under
rcu_read_lock, we cannot use a mutex in the latter function. Switch to a
spin lock to address this.

Signed-off-by: Jan Kiszka 
Signed-off-by: Marcelo Tosatti 
Signed-off-by: Avi Kivity