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From: "Cherry G. Mathew" <cherry@FreeBSD.org>
Date: Tue, 12 Mar 2013 13:13:01 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-projects@freebsd.org
Subject: svn commit: r248203 - in projects/amd64_xen_pv/sys/amd64: include/xen
 xen
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Author: cherry
Date: Tue Mar 12 13:13:00 2013
New Revision: 248203
URL: http://svnweb.freebsd.org/changeset/base/248203

Log:
  Add a function to set a descriptor entry within a descriptor table.
  
  Approved by: gibbs (implicit)

Modified:
  projects/amd64_xen_pv/sys/amd64/include/xen/xenpmap.h
  projects/amd64_xen_pv/sys/amd64/xen/mm.c

Modified: projects/amd64_xen_pv/sys/amd64/include/xen/xenpmap.h
==============================================================================
--- projects/amd64_xen_pv/sys/amd64/include/xen/xenpmap.h	Tue Mar 12 13:10:51 2013	(r248202)
+++ projects/amd64_xen_pv/sys/amd64/include/xen/xenpmap.h	Tue Mar 12 13:13:00 2013	(r248203)
@@ -34,10 +34,13 @@
 #ifndef _XEN_XENPMAP_H_
 #define _XEN_XENPMAP_H_
 
+struct segment_descriptor; /* Forward declaration */
+
 void _xen_queue_pt_update(vm_paddr_t, vm_paddr_t, char *, int);
 void xen_pt_switch(vm_paddr_t);
 void xen_pt_user_switch(vm_paddr_t);
 void xen_set_ldt(vm_paddr_t, unsigned long);
+void xen_set_descriptor(vm_paddr_t, uint64_t *);
 void xen_pgdir_pin(vm_paddr_t);
 void xen_pgdir_unpin(vm_paddr_t);
 void xen_pgdpt_pin(vm_paddr_t);

Modified: projects/amd64_xen_pv/sys/amd64/xen/mm.c
==============================================================================
--- projects/amd64_xen_pv/sys/amd64/xen/mm.c	Tue Mar 12 13:10:51 2013	(r248202)
+++ projects/amd64_xen_pv/sys/amd64/xen/mm.c	Tue Mar 12 13:13:00 2013	(r248203)
@@ -329,6 +329,12 @@ xen_set_ldt(vm_paddr_t ptr, unsigned lon
 	PANIC_IF(HYPERVISOR_mmuext_op(&op, 1, NULL, DOMID_SELF) < 0);
 }
 
+void
+xen_set_descriptor(vm_paddr_t dte_ma, uint64_t *dte_ptr)
+{
+  PANIC_IF(HYPERVISOR_update_descriptor(dte_ma, *dte_ptr) < 0);
+}
+
 void xen_tlb_flush(void)
 {
 	struct mmuext_op op;