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author | Jan Kiszka <jan.kiszka@siemens.com> | 2012-05-17 10:32:36 -0300 |
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committer | Avi Kivity <avi@redhat.com> | 2012-05-21 19:22:50 +0300 |
commit | 39853bbc497d4ca19c553a620afdc459e81d67ce (patch) | |
tree | ec743b6b3c5411d29e493af3b6fe03fcc63bb036 /kvm-all.c | |
parent | e7b2030862f63ee02331940b9f1742cd025c1908 (diff) | |
download | qemu-39853bbc497d4ca19c553a620afdc459e81d67ce.zip qemu-39853bbc497d4ca19c553a620afdc459e81d67ce.tar.gz qemu-39853bbc497d4ca19c553a620afdc459e81d67ce.tar.bz2 |
kvm: Introduce kvm_irqchip_add/remove_irqfd
Add services to associate an eventfd file descriptor as input with an
IRQ line as output. Such a line can be an input pin of an in-kernel
irqchip or a virtual line returned by kvm_irqchip_add_route.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'kvm-all.c')
-rw-r--r-- | kvm-all.c | 30 |
1 files changed, 30 insertions, 0 deletions
@@ -1108,6 +1108,21 @@ int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg) return virq; } +static int kvm_irqchip_assign_irqfd(KVMState *s, int fd, int virq, bool assign) +{ + struct kvm_irqfd irqfd = { + .fd = fd, + .gsi = virq, + .flags = assign ? 0 : KVM_IRQFD_FLAG_DEASSIGN, + }; + + if (!kvm_irqchip_in_kernel()) { + return -ENOSYS; + } + + return kvm_vm_ioctl(s, KVM_IRQFD, &irqfd); +} + #else /* !KVM_CAP_IRQ_ROUTING */ static void kvm_init_irq_routing(KVMState *s) @@ -1123,8 +1138,23 @@ int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg) { abort(); } + +static int kvm_irqchip_assign_irqfd(KVMState *s, int fd, int virq, bool assign) +{ + abort(); +} #endif /* !KVM_CAP_IRQ_ROUTING */ +int kvm_irqchip_add_irqfd(KVMState *s, int fd, int virq) +{ + return kvm_irqchip_assign_irqfd(s, fd, virq, true); +} + +int kvm_irqchip_remove_irqfd(KVMState *s, int fd, int virq) +{ + return kvm_irqchip_assign_irqfd(s, fd, virq, false); +} + static int kvm_irqchip_create(KVMState *s) { QemuOptsList *list = qemu_find_opts("machine"); |