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KVM: remove in_range from io devices

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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>
This commit is contained in:
Michael S. Tsirkin 2009-06-29 22:24:32 +03:00 • committed by Avi Kivity
commit bda9020e24
10 changed files with 152 additions and 208 deletions
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6
include/linux/kvm_host.h
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@ -60,8 +60,10 @@ struct kvm_io_bus {
void kvm_io_bus_init(struct kvm_io_bus *bus);
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);
int kvm_io_bus_write(struct kvm_io_bus *bus, gpa_t addr, int len,
const void *val);
int kvm_io_bus_read(struct kvm_io_bus *bus, gpa_t addr, int len,
void *val);
void __kvm_io_bus_register_dev(struct kvm_io_bus *bus,
struct kvm_io_device *dev);
void kvm_io_bus_register_dev(struct kvm *kvm, struct kvm_io_bus *bus,