Add virtio-blk support

Virtio-blk is a paravirtual block device based on VirtIO.  It can be used by
specifying the if=virtio parameter to the -drive parameter.

When using -enable-kvm, it can achieve very good performance compared to IDE or
SCSI.

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>



git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5870 c046a42c-6fe2-441c-8c8c-71466251a162

1 files changed, 13 insertions, 0 deletions

diff --git a/hw/pc.c b/hw/pc.c
index 1486b683a8..25dedc8999 100644
--- a/hw/pc.c
+++ b/hw/pc.c
@@ -33,6 +33,7 @@
 #include "boards.h"
 #include "console.h"
 #include "fw_cfg.h"
+#include "virtio-blk.h"
 
 /* output Bochs bios info messages */
 //#define DEBUG_BIOS
@@ -1092,6 +1093,18 @@ static void pc_init1(ram_addr_t ram_size, int vga_ram_size,
 	    }
         }
     }
+
+    /* Add virtio block devices */
+    if (pci_enabled) {
+        int index;
+        int unit_id = 0;
+
+        while ((index = drive_get_index(IF_VIRTIO, 0, unit_id)) != -1) {
+            virtio_blk_init(pci_bus, 0x1AF4, 0x1001,
+                            drives_table[index].bdrv);
+            unit_id++;
+        }
+    }
 }
 
 static void pc_init_pci(ram_addr_t ram_size, int vga_ram_size,