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KVM: kvm_io_device: extend in_range() to manage len and write attribute

Browse source 
Modify member in_range() of structure kvm_io_device to pass length and the type
of the I/O (write or read).

This modification allows to use kvm_io_device with coalesced MMIO.

Signed-off-by: Laurent Vivier <[email protected]>
Signed-off-by: Avi Kivity <[email protected]>
This commit is contained in:
Laurent Vivier 2008-05-30 16:05:53 +02:00 • committed by Avi Kivity
commit 92760499d0
9 changed files with 40 additions and 25 deletions
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3
virt/kvm/ioapic.c
View file

@ -307,7 +307,8 @@ void kvm_ioapic_update_eoi(struct kvm *kvm, int vector)
__kvm_ioapic_update_eoi(ioapic, i);
}
static int ioapic_in_range(struct kvm_io_device *this, gpa_t addr)
static int ioapic_in_range(struct kvm_io_device *this, gpa_t addr,
int len, int is_write)
{
struct kvm_ioapic *ioapic = (struct kvm_ioapic *)this->private;

8
virt/kvm/iodev.h
View file

@ -27,7 +27,8 @@ struct kvm_io_device {
gpa_t addr,
int len,
const void *val);
int (*in_range)(struct kvm_io_device *this, gpa_t addr);
int (*in_range)(struct kvm_io_device *this, gpa_t addr, int len,
int is_write);
void (*destructor)(struct kvm_io_device *this);
void *private;
@ -49,9 +50,10 @@ static inline void kvm_iodevice_write(struct kvm_io_device *dev,
dev->write(dev, addr, len, val);
}
static inline int kvm_iodevice_inrange(struct kvm_io_device *dev, gpa_t addr)
static inline int kvm_iodevice_inrange(struct kvm_io_device *dev,
gpa_t addr, int len, int is_write)
{
return dev->in_range(dev, addr);
return dev->in_range(dev, addr, len, is_write);
}
static inline void kvm_iodevice_destructor(struct kvm_io_device *dev)

5
virt/kvm/kvm_main.c
View file

@ -1350,14 +1350,15 @@ 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)
struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus,
gpa_t addr, int len, int is_write)
{
int i;
for (i = 0; i < bus->dev_count; i++) {
struct kvm_io_device *pos = bus->devs[i];
if (pos->in_range(pos, addr))
if (pos->in_range(pos, addr, len, is_write))
return pos;
}