KVM: add module parameters documentation

[deliverable/linux.git] / virt / kvm / coalesced_mmio.c

diff --git a/virt/kvm/coalesced_mmio.c b/virt/kvm/coalesced_mmio.c
index 7b7cc9fe5ee3b095195f0b067ddd561b659d175f..0352f81ecc0b09cbf8f5c813ce8c8d2772d27766 100644 (file)
--- a/virt/kvm/coalesced_mmio.c
+++ b/virt/kvm/coalesced_mmio.c
@@ -19,18 +19,14 @@ static inline struct kvm_coalesced_mmio_dev *to_mmio(struct kvm_io_device *dev)
        return container_of(dev, struct kvm_coalesced_mmio_dev, dev);
 }
 
-static int coalesced_mmio_in_range(struct kvm_io_device *this,
-                                  gpa_t addr, int len, int is_write)
+static int coalesced_mmio_in_range(struct kvm_coalesced_mmio_dev *dev,
+                                  gpa_t addr, int len)
 {
-       struct kvm_coalesced_mmio_dev *dev = to_mmio(this);
        struct kvm_coalesced_mmio_zone *zone;
        struct kvm_coalesced_mmio_ring *ring;
        unsigned avail;
        int i;
 
-       if (!is_write)
-               return 0;
-
        /* Are we able to batch it ? */
 
        /* last is the first free entry
@@ -60,11 +56,13 @@ static int coalesced_mmio_in_range(struct kvm_io_device *this,
        return 0;
 }
 
-static void coalesced_mmio_write(struct kvm_io_device *this,
-                                gpa_t addr, int len, const void *val)
+static int coalesced_mmio_write(struct kvm_io_device *this,
+                               gpa_t addr, int len, const void *val)
 {
        struct kvm_coalesced_mmio_dev *dev = to_mmio(this);
        struct kvm_coalesced_mmio_ring *ring = dev->kvm->coalesced_mmio_ring;
+       if (!coalesced_mmio_in_range(dev, addr, len))
+               return -EOPNOTSUPP;
 
        spin_lock(&dev->lock);
 
@@ -76,6 +74,7 @@ static void coalesced_mmio_write(struct kvm_io_device *this,
        smp_wmb();
        ring->last = (ring->last + 1) % KVM_COALESCED_MMIO_MAX;
        spin_unlock(&dev->lock);
+       return 0;
 }
 
 static void coalesced_mmio_destructor(struct kvm_io_device *this)
@@ -87,7 +86,6 @@ static void coalesced_mmio_destructor(struct kvm_io_device *this)
 
 static const struct kvm_io_device_ops coalesced_mmio_ops = {
        .write      = coalesced_mmio_write,
-       .in_range   = coalesced_mmio_in_range,
        .destructor = coalesced_mmio_destructor,
 };