[Xen-devel] [PATCH][VT] Remove L2 pin for 1:1 page table on control panel

["Jiang, Yunhong" <yunhong.jiang@xxxxxxxxx>]

This patch remove the L2 pin for 1:1 page table on control panel. 
L2 pin for 1:1 page table on control panel cause entries for top 64M
address changed by alloc_l2_table().

Thanks
Yunhong Jiang

Signed-off-by: Yunhong Jiang <yunhong.jiang@xxxxxxxxx>

diff -r 51fa7e0bd968 -r b187d5555866 tools/libxc/xc_vmx_build.c
--- a/tools/libxc/xc_vmx_build.c        Sat Sep 10 03:34:52 2005
+++ b/tools/libxc/xc_vmx_build.c        Mon Sep 12 05:09:23 2005
@@ -613,14 +613,6 @@
     start_info->store_mfn    = *store_mfn;
     start_info->store_evtchn = store_evtchn;
     munmap(start_info, PAGE_SIZE);
-    /*
-     * Pin down l2tab addr as page dir page - causes hypervisor to
provide
-     * correct protection for the page
-     */ 
-#ifdef __i386__
-    if ( pin_table(xc_handle, MMUEXT_PIN_L2_TABLE, l2tab>>PAGE_SHIFT,
dom) )
-        goto error_out;
-#endif
 
     /* Send the page update requests down to the hypervisor. */
     if ( xc_finish_mmu_updates(xc_handle, mmu) )
diff -r 51fa7e0bd968 -r b187d5555866 xen/arch/x86/domain.c
--- a/xen/arch/x86/domain.c     Sat Sep 10 03:34:52 2005
+++ b/xen/arch/x86/domain.c     Mon Sep 12 05:09:23 2005
@@ -463,9 +463,7 @@
     }
     else
     {
-#ifdef __x86_64__
         if ( !(c->flags & VGCF_VMX_GUEST) )
-#endif
             if (
!get_page_and_type(&frame_table[phys_basetab>>PAGE_SHIFT], d, 
                                     PGT_base_page_table) )
                 return -EINVAL;
diff -r 51fa7e0bd968 -r b187d5555866 xen/arch/x86/vmx.c
--- a/xen/arch/x86/vmx.c        Sat Sep 10 03:34:52 2005
+++ b/xen/arch/x86/vmx.c        Mon Sep 12 05:09:23 2005
@@ -1077,11 +1077,6 @@
             VMX_DBG_LOG(DBG_LEVEL_1, "enable PAE on cr4\n");
             __vmwrite(GUEST_CR4, crn | X86_CR4_PAE);
         }
-#elif defined( __i386__)
-               unsigned long old_base_mfn;
-        old_base_mfn = pagetable_get_pfn(d->arch.guest_table);
-        if (old_base_mfn)
-            put_page(pfn_to_page(old_base_mfn));
 #endif
         /*
          * Now arch.guest_table points to machine physical.

Attachment: linear.diff
Description: linear.diff

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