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[Qemu-devel] [PATCH 0/7] KVM: irqfds for s390
From: |
Cornelia Huck |
Subject: |
[Qemu-devel] [PATCH 0/7] KVM: irqfds for s390 |
Date: |
Tue, 25 Feb 2014 18:24:38 +0100 |
Hi,
here's my current patchset enabling irqfds for s390, based on current
kvm/queue.
It introduces adapter interrupts for virtio-ccw (these have been specced
for virtio-1.0 in the virtio oasis standard that is currently under work).
We use two-staged indicators for the queue indicator area (summary indicator)
and the queue indicators. Mainly fixes compared to the last time I posted
this as an RFC (it has been some time...)
For implementing irqfds, we exploit the common infrastructure via adding
a new interrupt routing type for adapter interrupts. Each of these routes
contains several parameters like the matching I/O adapter and the locations
of the summary and queue indicators - one route per virtqueue.
Patches 1 and 2 are relevant for guest support for adapter interrupts.
Patch 1 will be pushed upstream via the s390 architecture tree.
Patch 3 tries to fix a problem in the common irqfd code I managed to trigger;
it might make sense to push this on its own.
Patch 4 introduces infrastructure to enable capabilities on a per-vm basis
(instead of only per-vcpu). It might be of common interest, but will be
used in this patchset to introduce a s390-specific irqchip capability that
needs to be enabled by userspace.
Patch 5 introduces the concept of I/O adapters that act as adapter interrupt
sources. They contain various characteristics, not all of them relevant for
virtio-ccw but of general use for other types of adapter interrupts. They
are registered and modified via the new s390 floating interrupt controller.
Patch 6 finally wires up irqfds for virtio-ccw adapter interrupts. The
capability for this needs to be explicitly enabled by userspace to avoid
older qemus choking on newer kernels.
Patch 7 is providing a stop-gap measure to let us run not-quite-as-small
guests: we gobble up irqroutes fairly quickly. There must be a better way.
A git branch with the patches is available at
git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux.git kvms390-irqfd
Cornelia Huck (6):
KVM: s390: virtio-ccw adapter interrupt support.
KVM: eventfd: Fix lock order inversion.
KVM: Add per-vm capability enablement.
KVM: s390: adapter interrupt sources
KVM: s390: irq routing for adapter interrupts.
KVM: Bump KVM_MAX_IRQ_ROUTES for s390
Martin Schwidefsky (1):
s390/airq: add support for irq ranges
Documentation/virtual/kvm/api.txt | 27 ++-
Documentation/virtual/kvm/devices/s390_flic.txt | 45 ++++
arch/s390/include/asm/airq.h | 14 +-
arch/s390/include/asm/irq.h | 1 +
arch/s390/include/asm/kvm_host.h | 30 +++
arch/s390/include/uapi/asm/kvm.h | 22 ++
arch/s390/kernel/irq.c | 1 +
arch/s390/kvm/Kconfig | 2 +
arch/s390/kvm/Makefile | 2 +-
arch/s390/kvm/interrupt.c | 287 ++++++++++++++++++++++-
arch/s390/kvm/irq.h | 22 ++
arch/s390/kvm/kvm-s390.c | 42 ++++
arch/s390/kvm/kvm-s390.h | 2 +
drivers/s390/cio/airq.c | 66 ++++--
drivers/s390/kvm/virtio_ccw.c | 276 +++++++++++++++++++++-
include/linux/kvm_host.h | 13 +
include/uapi/linux/kvm.h | 16 ++
virt/kvm/eventfd.c | 8 +-
18 files changed, 827 insertions(+), 49 deletions(-)
create mode 100644 arch/s390/kvm/irq.h
--
1.7.9.5
- [Qemu-devel] [PATCH 0/7] KVM: irqfds for s390,
Cornelia Huck <=
- [Qemu-devel] [PATCH 5/7] KVM: s390: adapter interrupt sources, Cornelia Huck, 2014/02/25
- [Qemu-devel] [PATCH 4/7] KVM: Add per-vm capability enablement., Cornelia Huck, 2014/02/25
- [Qemu-devel] [PATCH 1/7] s390/airq: add support for irq ranges, Cornelia Huck, 2014/02/25
- [Qemu-devel] [PATCH 6/7] KVM: s390: irq routing for adapter interrupts., Cornelia Huck, 2014/02/25
- [Qemu-devel] [PATCH 2/7] KVM: s390: virtio-ccw adapter interrupt support., Cornelia Huck, 2014/02/25
- [Qemu-devel] [PATCH 7/7] KVM: Bump KVM_MAX_IRQ_ROUTES for s390, Cornelia Huck, 2014/02/25
- [Qemu-devel] [PATCH 3/7] KVM: eventfd: Fix lock order inversion., Cornelia Huck, 2014/02/25