linux-stable.git/include/linux/kvm.h, branch linux-2.6.30.y

KVM: Fix overlapping check for memory slots

2009-04-22T10:52:09+00:00

When checking for overlapping slots on registration of a new one, kvm
currently also considers zero-length (ie. deleted) slots and rejects
requests incorrectly. This finally denies user space from joining slots.
Fix the check by skipping deleted slots and advertise this via a
KVM_CAP_JOIN_MEMORY_REGIONS_WORKS.

Cc: stable@kernel.org
Signed-off-by: Jan Kiszka 
Signed-off-by: Avi Kivity

KVM: Correct deassign device ioctl to IOW

2009-03-24T09:03:15+00:00

It's IOR by mistake, so fix it before release.

Signed-off-by: Sheng Yang 
Signed-off-by: Avi Kivity

KVM: define KVM_CAP_DEVICE_DEASSIGNMENT

2009-03-24T09:03:12+00:00

define KVM_CAP_DEVICE_DEASSIGNMENT and KVM_DEASSIGN_PCI_DEVICE
for device deassignment.

the ioctl has been already implemented in the
commit: 0a920356748df4fb06e86c21c23d2ed6d31d37ad

Acked-by: Mark McLoughlin 
Signed-off-by: Weidong Han 
Signed-off-by: Avi Kivity

KVM: Report IRQ injection status to userspace.

2009-03-24T09:03:11+00:00

IRQ injection status is either -1 (if there was no CPU found
that should except the interrupt because IRQ was masked or
ioapic was misconfigured or ...) or >= 0 in that case the
number indicates to how many CPUs interrupt was injected.
If the value is 0 it means that the interrupt was coalesced
and probably should be reinjected.

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

KVM: Use irq routing API for MSI

2009-03-24T09:03:09+00:00

Merge MSI userspace interface with IRQ routing table. Notice the API have been
changed, and using IRQ routing table would be the only interface kvm-userspace
supported.

Signed-off-by: Sheng Yang 
Signed-off-by: Avi Kivity

KVM: Avoid using CONFIG_ in userspace visible headers

2009-03-24T09:03:06+00:00

Kconfig symbols are not available in userspace, and are not stripped by
headers-install.  Avoid their use by adding #defines in  to
suit each architecture.

Signed-off-by: Avi Kivity

KVM: Userspace controlled irq routing

2009-03-24T09:03:06+00:00

Currently KVM has a static routing from GSI numbers to interrupts (namely,
0-15 are mapped 1:1 to both PIC and IOAPIC, and 16:23 are mapped 1:1 to
the IOAPIC).  This is insufficient for several reasons:

- HPET requires non 1:1 mapping for the timer interrupt
- MSIs need a new method to assign interrupt numbers and dispatch them
- ACPI APIC mode needs to be able to reassign the PCI LINK interrupts to the
  ioapics

This patch implements an interrupt routing table (as a linked list, but this
can be easily changed) and a userspace interface to replace the table.  The
routing table is initialized according to the current hardwired mapping.

Signed-off-by: Avi Kivity

KVM: Add support to disable MSI for assigned device

2009-03-24T09:03:02+00:00

MSI is always enabled by default for msi2intx=1. But if msi2intx=0, we
have to disable MSI if guest require to do so.

The patch also discard unnecessary msi2intx judgment if guest want to update
MSI state.

Notice KVM_DEV_IRQ_ASSIGN_MSI_ACTION is a mask which should cover all MSI
related operations, though we only got one for now.

Signed-off-by: Sheng Yang 
Signed-off-by: Avi Kivity

KVM: PIT: provide an option to disable interrupt reinjection

2009-03-24T09:02:55+00:00

Certain clocks (such as TSC) in older 2.6 guests overaccount for lost
ticks, causing severe time drift. Interrupt reinjection magnifies the
problem.

Provide an option to disable it.

[avi: allow room for expansion in case we want to disable reinjection
      of other timers]

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

KVM: Advertise guest debug capability per-arch

2009-03-24T09:02:52+00:00

Limit KVM_CAP_SET_GUEST_DEBUG only to those archs (currently x86) that
support it. This simplifies user space stub implementations.

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