# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1216645373 -3600
# Node ID c049e70af85fbe2006ae5447420fefe8e52ab397
# Parent 85a83b919653378db803882286fa156079c7cd69
libxc: add xc_gnttab_map_domain_grant_refs.
xc_gnttab_map_domain_grant_refs permits to simply map several pages
from the same domain.
Signed-off-by: Samuel Thibault <samuel.thibault@xxxxxxxxxxxxx>
---
tools/libxc/xc_linux.c | 23 +++++++++++++++++++++--
tools/libxc/xenctrl.h | 17 +++++++++++++++++
2 files changed, 38 insertions(+), 2 deletions(-)
diff -r 85a83b919653 -r c049e70af85f tools/libxc/xc_linux.c
--- a/tools/libxc/xc_linux.c Mon Jul 21 10:39:15 2008 +0100
+++ b/tools/libxc/xc_linux.c Mon Jul 21 14:02:53 2008 +0100
@@ -418,9 +418,10 @@ void *xc_gnttab_map_grant_ref(int xcg_ha
return addr;
}
-void *xc_gnttab_map_grant_refs(int xcg_handle,
+static void *do_gnttab_map_grant_refs(int xcg_handle,
uint32_t count,
uint32_t *domids,
+ int domids_stride,
uint32_t *refs,
int prot)
{
@@ -435,7 +436,7 @@ void *xc_gnttab_map_grant_refs(int xcg_h
for ( i = 0; i < count; i++ )
{
- map->refs[i].domid = domids[i];
+ map->refs[i].domid = domids[i * domids_stride];
map->refs[i].ref = refs[i];
}
@@ -464,6 +465,24 @@ void *xc_gnttab_map_grant_refs(int xcg_h
return addr;
}
+void *xc_gnttab_map_grant_refs(int xcg_handle,
+ uint32_t count,
+ uint32_t *domids,
+ uint32_t *refs,
+ int prot)
+{
+ return do_gnttab_map_grant_refs(xcg_handle, count, domids, 1, refs, prot);
+}
+
+void *xc_gnttab_map_domain_grant_refs(int xcg_handle,
+ uint32_t count,
+ uint32_t domid,
+ uint32_t *refs,
+ int prot)
+{
+ return do_gnttab_map_grant_refs(xcg_handle, count, &domid, 0, refs, prot);
+}
+
int xc_gnttab_munmap(int xcg_handle,
void *start_address,
uint32_t count)
diff -r 85a83b919653 -r c049e70af85f tools/libxc/xenctrl.h
--- a/tools/libxc/xenctrl.h Mon Jul 21 10:39:15 2008 +0100
+++ b/tools/libxc/xenctrl.h Mon Jul 21 14:02:53 2008 +0100
@@ -865,6 +865,23 @@ void *xc_gnttab_map_grant_refs(int xcg_h
uint32_t *refs,
int prot);
+/**
+ * Memory maps one or more grant references from one domain to a
+ * contiguous local address range. Mappings should be unmapped with
+ * xc_gnttab_munmap. Returns NULL on failure.
+ *
+ * @parm xcg_handle a handle on an open grant table interface
+ * @parm count the number of grant references to be mapped
+ * @parm domid the domain to map memory from
+ * @parm refs an array of @count grant references to be mapped
+ * @parm prot same flag as in mmap()
+ */
+void *xc_gnttab_map_domain_grant_refs(int xcg_handle,
+ uint32_t count,
+ uint32_t domid,
+ uint32_t *refs,
+ int prot);
+
/*
* Unmaps the @count pages starting at @start_address, which were mapped by a
* call to xc_gnttab_map_grant_ref or xc_gnttab_map_grant_refs. Returns zero
_______________________________________________
Xen-changelog mailing list
Xen-changelog@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-changelog
|
Home