[Xen-devel] [PATCH 18 of 20] Lazy FPU for n2 guest

[Eddie Dong <eddie.dong@xxxxxxxxx>]

# HG changeset patch
# User Eddie Dong <eddie.dong@xxxxxxxxx>
# Date 1307003601 -28800
# Node ID 0cedbe9214c1632a0f1816d8b6d7442dc5f40065
# Parent  24d4d7d3e4c44c8dc61f464bca9aae57480dfe75
Lazy FPU for n2 guest

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

diff -r 24d4d7d3e4c4 -r 0cedbe9214c1 xen/arch/x86/hvm/vmx/vvmx.c
--- a/xen/arch/x86/hvm/vmx/vvmx.c       Thu Jun 02 16:33:21 2011 +0800
+++ b/xen/arch/x86/hvm/vmx/vvmx.c       Thu Jun 02 16:33:21 2011 +0800
@@ -842,6 +842,9 @@ static void virtual_vmentry(struct cpu_u
     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 */
 }
 
@@ -990,6 +993,9 @@ static void virtual_vmexit(struct cpu_us
     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);
 }
 
@@ -1319,13 +1325,18 @@ int nvmx_n2_vmexit_handler(struct cpu_us
 
         /*
          * 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);

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