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authorMichael S. Tsirkin <mst@redhat.com>2009-06-29 23:24:32 +0400
committerAvi Kivity <avi@redhat.com>2009-09-10 09:33:05 +0400
commitbda9020e2463ec94db9f97e8615f3bae22069838 (patch)
tree48125316d4c0f419a35aefdfbf665d30ad0c55ca /virt/kvm/kvm_main.c
parent6c474694530f377507f9aca438c17206e051e6e7 (diff)
downloadlinux-bda9020e2463ec94db9f97e8615f3bae22069838.tar.xz
KVM: remove in_range from io devices
This changes bus accesses to use high-level kvm_io_bus_read/kvm_io_bus_write functions. in_range now becomes unused so it is removed from device ops in favor of read/write callbacks performing range checks internally. This allows aliasing (mostly for in-kernel virtio), as well as better error handling by making it possible to pass errors up to userspace. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'virt/kvm/kvm_main.c')
-rw-r--r--virt/kvm/kvm_main.c26
1 files changed, 16 insertions, 10 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 0edc366ecf89..594606526620 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -2512,19 +2512,25 @@ void kvm_io_bus_destroy(struct kvm_io_bus *bus)
}
}
-struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus,
- gpa_t addr, int len, int is_write)
+/* kvm_io_bus_write - called under kvm->slots_lock */
+int kvm_io_bus_write(struct kvm_io_bus *bus, gpa_t addr,
+ int len, const void *val)
{
int i;
+ for (i = 0; i < bus->dev_count; i++)
+ if (!kvm_iodevice_write(bus->devs[i], addr, len, val))
+ return 0;
+ return -EOPNOTSUPP;
+}
- for (i = 0; i < bus->dev_count; i++) {
- struct kvm_io_device *pos = bus->devs[i];
-
- if (kvm_iodevice_in_range(pos, addr, len, is_write))
- return pos;
- }
-
- return NULL;
+/* kvm_io_bus_read - called under kvm->slots_lock */
+int kvm_io_bus_read(struct kvm_io_bus *bus, gpa_t addr, int len, void *val)
+{
+ int i;
+ for (i = 0; i < bus->dev_count; i++)
+ if (!kvm_iodevice_read(bus->devs[i], addr, len, val))
+ return 0;
+ return -EOPNOTSUPP;
}
void kvm_io_bus_register_dev(struct kvm *kvm, struct kvm_io_bus *bus,