[PATCH 0/6] qemu: irqfds for s390x

Cornelia Huck
2014-02-25T17:25:14Z

Hi,

here's the companion patchset to "KVM: irqfds for s390", based on
Christian's s390-next branch.

Patch 1 adds support for adapter interrupts to virtio-ccw. This has been
posted before, modulo some fixes.

Patch 2 grabs the interfaces introduced by the kernel patchset. Will be
replaced by a normal headers update.

Patch 3 introduces simple wrappers for enabling capabilities. We can convert
existing users later on.

Patch 4 registers an I/O adapter when we enable adapter interrupts for a
device. We just have one virtio-ccw adapter for one interruption subclass.

Patch 5 adds reference counting for indicators. This is needed because we
want to map and pin indicator pages and drop them again when the last user
is gone.

Patch 6 finally enables irqfds via irq routing on s390x/virtio-ccw. We've
done most of the work in qemu already, so the kernel basically only needs
to write to the correct memory location and inject an interrupt.

A git branch with the patches is available at

https://github.com/cohuck/qemu.git s390x-irqfd

Cornelia Huck (6):
s390x/virtio-ccw: Adapter interrupt support.
linux-headers: add new interfaces
kvm: add kvm_enable_cap_{vm,vcpu}
s390x: Add I/O adapter registration.
s390x/virtio-ccw: reference-counted indicators
s390x/virtio-ccw: Wire up irq routing and irqfds.

hw/intc/s390_flic.c | 66 +++++++++
hw/s390x/css.c | 61 ++++++++
hw/s390x/css.h | 6 +
hw/s390x/virtio-ccw.c | 325 +++++++++++++++++++++++++++++++++++++++---
hw/s390x/virtio-ccw.h | 18 ++-
include/hw/s390x/adapter.h | 23 +++
include/qemu/typedefs.h | 1 +
include/sysemu/kvm.h | 6 +
kvm-all.c | 57 +++++++-
kvm-stub.c | 5 +
linux-headers/asm-s390/kvm.h | 22 +++
linux-headers/linux/kvm.h | 16 +++
target-s390x/cpu.h | 33 +++++
target-s390x/ioinst.h | 2 +
target-s390x/kvm.c | 13 +-
trace-events | 1 +
16 files changed, 627 insertions(+), 28 deletions(-)
create mode 100644 include/hw/s390x/adapter.h

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1.7.9.5