1.1 --- a/xen/drivers/block/xen_block.c	Wed Nov 05 11:51:24 2003 +0000
     1.2 +++ b/xen/drivers/block/xen_block.c	Wed Nov 05 11:57:19 2003 +0000
     1.3 @@ -235,6 +235,11 @@ long do_block_io_op(block_io_op_t *u_blo
     1.4          }
     1.5          break;
     1.6  
     1.7 +    case BLOCK_IO_OP_RING_ADDRESS:
     1.8 +        op.u.ring_mfn = virt_to_phys(p->blk_ring_base) >> PAGE_SHIFT;
     1.9 +        ret = copy_to_user(u_block_io_op, &op, sizeof(op)) ? -EFAULT : 0;
    1.10 +        break;
    1.11 +
    1.12      case BLOCK_IO_OP_VBD_CREATE:  
    1.13  	/* create a new VBD for a given domain; caller must be privileged  */
    1.14  	if(!IS_PRIV(p))

     2.1 --- a/xen/include/hypervisor-ifs/vbd.h	Wed Nov 05 11:51:24 2003 +0000
     2.2 +++ b/xen/include/hypervisor-ifs/vbd.h	Wed Nov 05 11:57:19 2003 +0000
     2.3 @@ -36,12 +36,13 @@ typedef struct {
     2.4  /* Block I/O trap operations and associated structures.
     2.5   */
     2.6  
     2.7 -#define BLOCK_IO_OP_SIGNAL      0    /* let xen know we have work to do */ 
     2.8 -#define BLOCK_IO_OP_RESET       1    /* reset ring indexes on quiescent i/f */
     2.9 -#define BLOCK_IO_OP_VBD_CREATE  2    /* create a new VBD for a given domain */
    2.10 -#define BLOCK_IO_OP_VBD_ADD     3    /* add an extent to a given VBD */
    2.11 -#define BLOCK_IO_OP_VBD_REMOVE  4    /* remove an extent from a given VBD */
    2.12 -#define BLOCK_IO_OP_VBD_DELETE  5    /* delete a VBD */
    2.13 +#define BLOCK_IO_OP_SIGNAL       0    /* let xen know we have work to do */ 
    2.14 +#define BLOCK_IO_OP_RESET        1    /* reset ring indexes on quiescent i/f */
    2.15 +#define BLOCK_IO_OP_RING_ADDRESS 2 /* returns machine address of I/O ring */
    2.16 +#define BLOCK_IO_OP_VBD_CREATE   3    /* create a new VBD for a given domain */
    2.17 +#define BLOCK_IO_OP_VBD_ADD      4    /* add an extent to a given VBD */
    2.18 +#define BLOCK_IO_OP_VBD_REMOVE   5    /* remove an extent from a given VBD */
    2.19 +#define BLOCK_IO_OP_VBD_DELETE   6    /* delete a VBD */
    2.20  
    2.21  
    2.22  typedef struct _xen_extent { 
    2.23 @@ -84,11 +85,12 @@ typedef struct block_io_op_st
    2.24      union
    2.25      {
    2.26          /* no entry for BLOCK_IO_OP_SIGNAL */
    2.27 +        /* no entry for BLOCK_IO_OP_RESET  */
    2.28 +	unsigned long ring_mfn; 
    2.29  	vbd_create_t  create_info; 
    2.30  	vbd_add_t     add_info; 
    2.31  	vbd_remove_t  remove_info; 
    2.32  	vbd_delete_t  delete_info; 
    2.33 -        /* no entry for BLOCK_IO_OP_RESET  */
    2.34      }
    2.35      u;
    2.36  } block_io_op_t;