KVM: Add support for in-kernel pio handlers

Useful for the PIC and PIT.

Signed-off-by: Yaozu (Eddie) Dong <eddie.dong@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/drivers/kvm/kvm.h b/drivers/kvm/kvm.h
index 31846b1c162..a7c5e6bee03 100644
--- a/drivers/kvm/kvm.h
+++ b/drivers/kvm/kvm.h
@@ -241,6 +241,7 @@ struct kvm_pio_request {
         struct page *guest_pages[2];
         unsigned guest_page_offset;
         int in;
+        int port;
         int size;
         int string;
         int down;
@@ -303,7 +304,8 @@ static inline int kvm_iodevice_inrange(struct kvm_io_device *dev, gpa_t addr)
 
 static inline void kvm_iodevice_destructor(struct kvm_io_device *dev)
 {
-        dev->destructor(dev);
+        if (dev->destructor)
+                dev->destructor(dev);
 }
 
 /*
@@ -453,6 +455,7 @@ struct kvm {
         struct list_head vm_list;
         struct file *filp;
         struct kvm_io_bus mmio_bus;
+        struct kvm_io_bus pio_bus;
 };
 
 struct descriptor_table {