[Xen-devel] [PATCH 3/9] privcmd interface addition to support share operations from Dom0 userspace

[Rusty Russell <rusty@xxxxxxxxxxxxxxx>]

Subject: privcmd interface addition to support share operations from Dom0 
userspace

We create to simple privcmd ops to create and grant access to shares.

diff -r 6d476981e3a5 -r 07a00d96357d 
linux-2.6-xen-sparse/drivers/xen/privcmd/privcmd.c
--- a/linux-2.6-xen-sparse/drivers/xen/privcmd/privcmd.c        Sun May 28 
14:49:17 2006
+++ b/linux-2.6-xen-sparse/drivers/xen/privcmd/privcmd.c        Wed May 31 
05:33:38 2006
@@ -268,6 +268,7 @@
        set_bit(__HYPERVISOR_xen_version,      hypercall_permission_map);
        set_bit(__HYPERVISOR_sched_op,         hypercall_permission_map);
        set_bit(__HYPERVISOR_sched_op_compat,  hypercall_permission_map);
+       set_bit(__HYPERVISOR_share_op,         hypercall_permission_map);
        set_bit(__HYPERVISOR_event_channel_op_compat,
                hypercall_permission_map);
 
diff -r 6d476981e3a5 -r 07a00d96357d tools/libxc/xc_domain.c
--- a/tools/libxc/xc_domain.c   Sun May 28 14:49:17 2006
+++ b/tools/libxc/xc_domain.c   Wed May 31 05:33:38 2006
@@ -482,6 +482,25 @@
     return rc;
 
 }
+
+share_ref_t xc_create_shared_pages(int xc_handle, unsigned int num_pages)
+{
+    DECLARE_DOM0_OP;
+
+    op.cmd = DOM0_CREATESHAREDPAGES;
+    op.u.createsharedpages.num = num_pages;
+    return do_dom0_op(xc_handle, &op);
+}
+
+int xc_grant_shared_pages(int xc_handle, domid_t domid, share_ref_t share_ref)
+{
+    DECLARE_DOM0_OP;
+
+    op.cmd = DOM0_GRANTSHAREDPAGES;
+    op.u.grantsharedpages.domain = domid;
+    op.u.grantsharedpages.share_ref = share_ref;
+    return do_dom0_op(xc_handle, &op);
+}    
 
 int xc_domain_irq_permission(int xc_handle,
                              uint32_t domid,
diff -r 6d476981e3a5 -r 07a00d96357d tools/libxc/xenctrl.h
--- a/tools/libxc/xenctrl.h     Sun May 28 14:49:17 2006
+++ b/tools/libxc/xenctrl.h     Wed May 31 05:33:38 2006
@@ -21,6 +21,7 @@
 #include <xen/memory.h>
 #include <xen/acm.h>
 #include <xen/acm_ops.h>
+#include <xen/share.h>
 
 #ifdef __ia64__
 #define XC_PAGE_SHIFT           14
@@ -584,6 +585,10 @@
 
 int xc_version(int xc_handle, int cmd, void *arg);
 
+/* Create & add permissions to sharable pages. */
+share_ref_t xc_create_shared_pages(int xc_handle, unsigned int num_pages);
+int xc_grant_shared_pages(int xc_handle, domid_t domid, share_ref_t share_ref);
+
 /*
  * MMU updates.
  */

-- 
 ccontrol: http://ccontrol.ozlabs.org


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