[Xen-changelog] [xen-unstable] Nested VMX: Lazy FPU for n2 guest

[Xen patchbot-unstable <patchbot@xxxxxxx>]

# HG changeset patch
# User Eddie Dong <eddie.dong@xxxxxxxxx>
# Date 1307607849 -28800
# Node ID 4bc49e35e5a03a9485e2f6ecdb357c8f4a173aea
# Parent  a91e0e23e2780c80fa13291027e83c961c5e385b
Nested VMX: Lazy FPU for n2 guest

Signed-off-by: Qing He <qing.he@xxxxxxxxx>
Signed-off-by: Eddie Dong <eddie.dong@xxxxxxxxx>
Acked-by: Tim Deegan <Tim.Deegan@xxxxxxxxxx>
Committed-by: Tim Deegan <Tim.Deegan@xxxxxxxxxx>
---


diff -r a91e0e23e278 -r 4bc49e35e5a0 xen/arch/x86/hvm/vmx/vvmx.c
--- a/xen/arch/x86/hvm/vmx/vvmx.c       Thu Jun 09 16:24:09 2011 +0800
+++ b/xen/arch/x86/hvm/vmx/vvmx.c       Thu Jun 09 16:24:09 2011 +0800
@@ -810,6 +810,9 @@
     regs->esp = __get_vvmcs(vvmcs, GUEST_RSP);
     regs->eflags = __get_vvmcs(vvmcs, GUEST_RFLAGS);
 
+    /* updating host cr0 to sync TS bit */
+    __vmwrite(HOST_CR0, v->arch.hvm_vmx.host_cr0);
+
     /* TODO: EPT_POINTER */
 }
 
@@ -958,6 +961,9 @@
     regs->esp = __get_vvmcs(nvcpu->nv_vvmcx, HOST_RSP);
     regs->eflags = __vmread(GUEST_RFLAGS);
 
+    /* updating host cr0 to sync TS bit */
+    __vmwrite(HOST_CR0, v->arch.hvm_vmx.host_cr0);
+
     vmreturn(regs, VMSUCCEED);
 }
 
@@ -1306,13 +1312,18 @@
 
         /*
          * decided by L0 and L1 exception bitmap, if the vetor is set by
-         * both, L0 has priority on #PF, L1 has priority on others
+         * both, L0 has priority on #PF and #NM, L1 has priority on others
          */
         if ( vector == TRAP_page_fault )
         {
             if ( paging_mode_hap(v->domain) )
                 nvcpu->nv_vmexit_pending = 1;
         }
+        else if ( vector == TRAP_no_device )
+        {
+            if ( v->fpu_dirtied )
+                nvcpu->nv_vmexit_pending = 1;
+        }
         else if ( (intr_info & valid_mask) == valid_mask )
         {
             exec_bitmap =__get_vvmcs(nvcpu->nv_vvmcx, EXCEPTION_BITMAP);

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