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xenbus: Use grant-table wrapper functions

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For xenbus_{map,unmap}_ring to work on HVM, the grant table operations
must be set up using the gnttab_set_{map,unmap}_op functions instead of
directly populating the fields of gnttab_map_grant_ref. These functions
simply populate the structure on paravirtualized Xen; however, on HVM
they must call __pa() on vaddr when populating op->host_addr because the
hypervisor cannot directly interpret guest-virtual addresses.

Signed-off-by: Daniel De Graaf <dgdegra@tycho.nsa.gov>
[v1: Fixed cleanpatch error]
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This commit is contained in:
Daniel De Graaf 2011-12-14 15:12:10 -05:00 committed by Konrad Rzeszutek Wilk
parent 2c5d37d30f
commit 2946a52ac7
1 changed files with 7 additions and 10 deletions
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17
drivers/xen/xenbus/xenbus_client.c
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@ -567,12 +567,10 @@ static int xenbus_map_ring_valloc_hvm(struct xenbus_device *dev,
int xenbus_map_ring(struct xenbus_device *dev, int gnt_ref,
grant_handle_t *handle, void *vaddr)
{
struct gnttab_map_grant_ref op = {
.host_addr = (unsigned long)vaddr,
.flags = GNTMAP_host_map,
.ref = gnt_ref,
.dom = dev->otherend_id,
};
struct gnttab_map_grant_ref op;
gnttab_set_map_op(&op, (phys_addr_t)vaddr, GNTMAP_host_map, gnt_ref,
dev->otherend_id);
if (HYPERVISOR_grant_table_op(GNTTABOP_map_grant_ref, &op, 1))
BUG();
@ -698,10 +696,9 @@ static int xenbus_unmap_ring_vfree_hvm(struct xenbus_device *dev, void *vaddr)
int xenbus_unmap_ring(struct xenbus_device *dev,
grant_handle_t handle, void *vaddr)
{
struct gnttab_unmap_grant_ref op = {
.host_addr = (unsigned long)vaddr,
.handle = handle,
};
struct gnttab_unmap_grant_ref op;
gnttab_set_unmap_op(&op, (phys_addr_t)vaddr, GNTMAP_host_map, handle);
if (HYPERVISOR_grant_table_op(GNTTABOP_unmap_grant_ref, &op, 1))
BUG();