# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1243862000 -3600
# Node ID 4b2172c60a8ca8d201fae7a211af506bb91e95d6
# Parent bd39df93a29e015e93b708639756661c3419b602
libxc: Add a function to map a domain's grant table.
Signed-off-by: Jiang, Yunhong <yunhong.jiang@xxxxxxxxx>
---
tools/libxc/xc_linux.c | 105 +++++++++++++++++++++++++++++++++++++++++++++++++
tools/libxc/xenctrl.h | 6 ++
2 files changed, 111 insertions(+)
diff -r bd39df93a29e -r 4b2172c60a8c tools/libxc/xc_linux.c
--- a/tools/libxc/xc_linux.c Mon Jun 01 14:12:53 2009 +0100
+++ b/tools/libxc/xc_linux.c Mon Jun 01 14:13:20 2009 +0100
@@ -562,6 +562,111 @@ int xc_gnttab_set_max_grants(int xcg_han
return 0;
}
+int xc_gnttab_op(int xc_handle, int cmd,
+ void * op, int op_size, int count)
+{
+ int ret = 0;
+ DECLARE_HYPERCALL;
+
+ hypercall.op = __HYPERVISOR_grant_table_op;
+ hypercall.arg[0] = cmd;
+ hypercall.arg[1] = (unsigned long)op;
+ hypercall.arg[2] = count;
+
+ if ( lock_pages(op, count* op_size) != 0 )
+ {
+ PERROR("Could not lock memory for Xen hypercall");
+ goto out1;
+ }
+
+ ret = do_xen_hypercall(xc_handle, &hypercall);
+
+ unlock_pages(op, count * op_size);
+
+ out1:
+ return ret;
+}
+
+struct grant_entry *xc_gnttab_map_table(int xc_handle, int domid, int *gnt_num)
+{
+ int rc, i;
+ struct gnttab_query_size query;
+ struct gnttab_setup_table setup;
+ unsigned long *frame_list = NULL;
+ xen_pfn_t *pfn_list = NULL;
+ struct grant_entry *gnt = NULL;
+
+ if (!gnt_num)
+ return NULL;
+
+ query.dom = domid;
+ rc = xc_gnttab_op(xc_handle, GNTTABOP_query_size,
+ &query, sizeof(query), 1);
+
+ if (rc || (query.status != GNTST_okay) )
+ {
+ ERROR("Could not query dom's grant size\n", domid);
+ return NULL;
+ }
+
+ *gnt_num = query.nr_frames *
+ (PAGE_SIZE / sizeof(struct grant_entry) );
+
+ frame_list = malloc(query.nr_frames * sizeof(unsigned long));
+ if (!frame_list || lock_pages(frame_list, query.nr_frames *
+ sizeof(unsigned long)))
+ {
+ ERROR("Alloc/lock frame_list in xc_gnttab_map_table\n");
+ if (frame_list)
+ free(frame_list);
+ return NULL;
+ }
+
+ pfn_list = malloc(query.nr_frames * sizeof(xen_pfn_t));
+
+ if (!pfn_list)
+ {
+ ERROR("Could not lock pfn_list in xc_gnttab_map_table\n");
+ goto err;
+ }
+
+ setup.dom = domid;
+ setup.nr_frames = query.nr_frames;
+ set_xen_guest_handle(setup.frame_list, frame_list);
+
+ /* XXX Any race with other setup_table hypercall? */
+ rc = xc_gnttab_op(xc_handle, GNTTABOP_setup_table,
+ &setup, sizeof(setup), 1);
+
+ if (rc ||( setup.status != GNTST_okay) )
+ {
+ ERROR("Could not get grant table frame list\n");
+ goto err;
+ }
+
+ for (i = 0; i < setup.nr_frames; i++)
+ pfn_list[i] = frame_list[i];
+
+ gnt = xc_map_foreign_pages(xc_handle, domid, PROT_READ,
+ pfn_list, setup.nr_frames);
+ if (!gnt)
+ {
+ ERROR("Could not map grant table\n");
+ goto err;
+ }
+
+err:
+ if (frame_list)
+ {
+ unlock_pages(frame_list, query.nr_frames * sizeof(unsigned long));
+ free(frame_list);
+ }
+ if (pfn_list)
+ free(pfn_list);
+
+ return gnt;
+}
+
/*
* Local variables:
* mode: C
diff -r bd39df93a29e -r 4b2172c60a8c tools/libxc/xenctrl.h
--- a/tools/libxc/xenctrl.h Mon Jun 01 14:12:53 2009 +0100
+++ b/tools/libxc/xenctrl.h Mon Jun 01 14:13:20 2009 +0100
@@ -27,6 +27,7 @@
#include <xen/event_channel.h>
#include <xen/sched.h>
#include <xen/memory.h>
+#include <xen/grant_table.h>
#include <xen/hvm/params.h>
#include <xen/xsm/acm.h>
#include <xen/xsm/acm_ops.h>
@@ -937,6 +938,11 @@ int xc_gnttab_set_max_grants(int xcg_han
int xc_gnttab_set_max_grants(int xcg_handle,
uint32_t count);
+int xc_gnttab_op(int xc_handle, int cmd,
+ void * op, int op_size, int count);
+
+struct grant_entry *xc_gnttab_map_table(int xc_handle, int domid, int
*gnt_num);
+
int xc_physdev_map_pirq(int xc_handle,
int domid,
int index,
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