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authorRadim Krčmář <rkrcmar@redhat.com>2016-07-22 20:27:26 +0200
committerRadim Krčmář <rkrcmar@redhat.com>2016-07-22 20:27:26 +0200
commit912902ce78b0d48f717f9128e61fb9bffbd65f86 (patch)
tree5a97dd19149ba1e0386df9bb467f8c5fb7ba2393 /virt/kvm/kvm_main.c
parent61f5dea179653558562ba9a5dd71eb29d91a383e (diff)
parent3a88bded203591d4683aacdbb65cd0f549bc58cb (diff)
Merge tag 'kvm-arm-for-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into next
KVM/ARM changes for Linux 4.8 - GICv3 ITS emulation - Simpler idmap management that fixes potential TLB conflicts - Honor the kernel protection in HYP mode - Removal of the old vgic implementation
Diffstat (limited to 'virt/kvm/kvm_main.c')
-rw-r--r--virt/kvm/kvm_main.c24
1 files changed, 24 insertions, 0 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 154b9ab459b0..61b31a5f76c8 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -3545,6 +3545,30 @@ int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
return r;
}
+struct kvm_io_device *kvm_io_bus_get_dev(struct kvm *kvm, enum kvm_bus bus_idx,
+ gpa_t addr)
+{
+ struct kvm_io_bus *bus;
+ int dev_idx, srcu_idx;
+ struct kvm_io_device *iodev = NULL;
+
+ srcu_idx = srcu_read_lock(&kvm->srcu);
+
+ bus = srcu_dereference(kvm->buses[bus_idx], &kvm->srcu);
+
+ dev_idx = kvm_io_bus_get_first_dev(bus, addr, 1);
+ if (dev_idx < 0)
+ goto out_unlock;
+
+ iodev = bus->range[dev_idx].dev;
+
+out_unlock:
+ srcu_read_unlock(&kvm->srcu, srcu_idx);
+
+ return iodev;
+}
+EXPORT_SYMBOL_GPL(kvm_io_bus_get_dev);
+
static struct notifier_block kvm_cpu_notifier = {
.notifier_call = kvm_cpu_hotplug,
};