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authorMichael S. Tsirkin <mst@redhat.com>2009-06-29 22:24:32 +0300
committerAvi Kivity <avi@redhat.com>2009-09-10 08:33:05 +0300
commitbda9020e2463ec94db9f97e8615f3bae22069838 (patch)
tree48125316d4c0f419a35aefdfbf665d30ad0c55ca /arch/ia64/kvm
parent6c474694530f377507f9aca438c17206e051e6e7 (diff)
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 'arch/ia64/kvm')
-rw-r--r--arch/ia64/kvm/kvm-ia64.c28
1 files changed, 8 insertions, 20 deletions
diff --git a/arch/ia64/kvm/kvm-ia64.c b/arch/ia64/kvm/kvm-ia64.c
index 5c766bd82b0..d7aa6bb8f47 100644
--- a/arch/ia64/kvm/kvm-ia64.c
+++ b/arch/ia64/kvm/kvm-ia64.c
@@ -210,16 +210,6 @@ int kvm_dev_ioctl_check_extension(long ext)
}
-static struct kvm_io_device *vcpu_find_mmio_dev(struct kvm_vcpu *vcpu,
- gpa_t addr, int len, int is_write)
-{
- struct kvm_io_device *dev;
-
- dev = kvm_io_bus_find_dev(&vcpu->kvm->mmio_bus, addr, len, is_write);
-
- return dev;
-}
-
static int handle_vm_error(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
@@ -231,6 +221,7 @@ static int handle_mmio(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
struct kvm_mmio_req *p;
struct kvm_io_device *mmio_dev;
+ int r;
p = kvm_get_vcpu_ioreq(vcpu);
@@ -247,16 +238,13 @@ static int handle_mmio(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
kvm_run->exit_reason = KVM_EXIT_MMIO;
return 0;
mmio:
- mmio_dev = vcpu_find_mmio_dev(vcpu, p->addr, p->size, !p->dir);
- if (mmio_dev) {
- if (!p->dir)
- kvm_iodevice_write(mmio_dev, p->addr, p->size,
- &p->data);
- else
- kvm_iodevice_read(mmio_dev, p->addr, p->size,
- &p->data);
-
- } else
+ if (p->dir)
+ r = kvm_io_bus_read(&vcpu->kvm->mmio_bus, p->addr,
+ p->size, &p->data);
+ else
+ r = kvm_io_bus_write(&vcpu->kvm->mmio_bus, p->addr,
+ p->size, &p->data);
+ if (r)
printk(KERN_ERR"kvm: No iodevice found! addr:%lx\n", p->addr);
p->state = STATE_IORESP_READY;