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kvm: i386: Add classic PCI device assignment

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This adds PCI device assignment for i386 targets using the classic KVM
interfaces. This version is 100% identical to what is being maintained
in qemu-kvm for several years and is supported by libvirt as well. It is
expected to remain relevant for another couple of years until kernels
without full-features and performance-wise equivalent VFIO support are
obsolete.

A refactoring to-do that should be done in-tree is to model MSI and
MSI-X support via the generic PCI layer, similar to what VFIO is already
doing for MSI-X. This should improve the correctness and clean up the
code from duplicate logic.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Acked-by: Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Jan Kiszka 2012-08-30 20:30:00 +02:00 committed by Avi Kivity
parent b139bd300f
commit c3ebd3ba78
3 changed files with 1917 additions and 1 deletions
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2
hw/kvm/Makefile.objs
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@ -1 +1 @@
obj-$(CONFIG_KVM) += clock.o apic.o i8259.o ioapic.o i8254.o
obj-$(CONFIG_KVM) += clock.o apic.o i8259.o ioapic.o i8254.o pci-assign.o

1915
hw/kvm/pci-assign.c Normal file
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1
hw/qdev-monitor.c
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@ -44,6 +44,7 @@ static const QDevAlias qdev_alias_table[] = {
{ "virtio-serial-s390", "virtio-serial", QEMU_ARCH_S390X },
{ "lsi53c895a", "lsi" },
{ "ich9-ahci", "ahci" },
{ "kvm-pci-assign", "pci-assign" },
{ }
};