[Xen-changelog] Like IA32 PAE xenlinux, we also need make VMX guest 1:1 page table PGD

[Xen patchbot -unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User kaf24@xxxxxxxxxxxxxxxxxxxx
# Node ID 19b458d4ba93ed4b54a74598e907a3c40be635b7
# Parent  7ce64f021a2c6bb092d8c940dadfa17ad18ac56f
Like IA32 PAE xenlinux, we also need make VMX guest 1:1 page table PGD
page below 4G.

Signed-off-by: Xin Li <xin.b.li@xxxxxxxxx>
Signed-off-by: Chengyuan Li <chengyuan.li@xxxxxxxxx>
Signed-off-by: Yunhong Jiang <yunhong.jiang@xxxxxxxxx>
Signed-off-by: Jun Nakajima <jun.nakajima@xxxxxxxxx>

diff -r 7ce64f021a2c -r 19b458d4ba93 tools/libxc/xc_vmx_build.c
--- a/tools/libxc/xc_vmx_build.c        Thu Sep 15 08:59:35 2005
+++ b/tools/libxc/xc_vmx_build.c        Thu Sep 15 09:12:03 2005
@@ -376,9 +376,21 @@
     if ( (mmu = xc_init_mmu_updates(xc_handle, dom)) == NULL )
         goto error_out;
 
+    /* First allocate page for page dir or pdpt */
+    ppt_alloc = (vpt_start - dsi.v_start) >> PAGE_SHIFT;
+    if ( page_array[ppt_alloc] > 0xfffff )
+    {
+       unsigned long nmfn;
+       nmfn = xc_make_page_below_4G( xc_handle, dom, page_array[ppt_alloc] );
+       if ( nmfn == 0 )
+       {
+           fprintf(stderr, "Couldn't get a page below 4GB :-(\n");
+           goto error_out;
+       }
+       page_array[ppt_alloc] = nmfn;
+    }
+
 #ifdef __i386__
-    /* First allocate page for page dir. */
-    ppt_alloc = (vpt_start - dsi.v_start) >> PAGE_SHIFT;
     l2tab = page_array[ppt_alloc++] << PAGE_SHIFT;
     ctxt->ctrlreg[3] = l2tab;
 
@@ -414,8 +426,6 @@
     munmap(vl1tab, PAGE_SIZE);
     munmap(vl2tab, PAGE_SIZE);
 #else
-    /* First allocate pdpt */
-    ppt_alloc = (vpt_start - dsi.v_start) >> PAGE_SHIFT;
     /* here l3tab means pdpt, only 4 entry is used */
     l3tab = page_array[ppt_alloc++] << PAGE_SHIFT;
     ctxt->ctrlreg[3] = l3tab;

_______________________________________________
Xen-changelog mailing list
Xen-changelog@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-changelog