RE: [Xen-devel] RFC: Nested VMX patch series 16: fpu

["Dong, Eddie" <eddie.dong@xxxxxxxxx>]

Thx, Eddie

        Signed-off-by: Qing He <qing.he@xxxxxxxxx>
        Signed-off-by: Eddie Dong <eddie.dong@xxxxxxxxx>



diff -r 7c75c8a9da05 xen/arch/x86/hvm/vmx/vvmx.c
--- a/xen/arch/x86/hvm/vmx/vvmx.c       Fri May 13 13:28:35 2011 +0800
+++ b/xen/arch/x86/hvm/vmx/vvmx.c       Fri May 13 13:31:33 2011 +0800
@@ -712,6 +712,9 @@
     regs->rsp = __get_vvmcs(vvmcs, GUEST_RSP);
     regs->rflags = __get_vvmcs(vvmcs, GUEST_RFLAGS);
 
+    /* updating host cr0 to sync TS bit */
+    __vmwrite(HOST_CR0, v->arch.hvm_vmx.host_cr0);
+
     /* TODO: EPT_POINTER */
 }
 
@@ -851,6 +854,9 @@
     regs->rsp = __get_vvmcs(nvcpu->nv_vvmcx, HOST_RSP);
     regs->rflags = __vmread(GUEST_RFLAGS);
 
+    /* updating host cr0 to sync TS bit */
+    __vmwrite(HOST_CR0, v->arch.hvm_vmx.host_cr0);
+
     vmreturn(regs, VMSUCCEED);
 }
 
@@ -948,13 +954,18 @@
 
         /*
          * 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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