[Xen-ia64-devel] [PATCH 15/23] vti domain save/restore: make vmx_vcpu_set_rr() accept non-current

[Isaku Yamahata <yamahata@xxxxxxxxxxxxx>]

# HG changeset patch
# User yamahata@xxxxxxxxxxxxx
# Date 1192013129 -32400
# Node ID 905a46fbe0d8f1c51e4eec565434b6e0069454ad
# Parent  795895b7bc84c4ea03bd5c4403325e99427ef4cf
make vmx_vcpu_set_rr accept non-current vcpu for setting vcpu context.
PATCHNAME: make_vmx_vcpu_set_rr_accept_non_current

Signed-off-by: Isaku Yamahata <yamahata@xxxxxxxxxxxxx>

diff -r 795895b7bc84 -r 905a46fbe0d8 xen/arch/ia64/vmx/vmx_vcpu.c
--- a/xen/arch/ia64/vmx/vmx_vcpu.c      Thu Oct 11 18:21:42 2007 +0900
+++ b/xen/arch/ia64/vmx/vmx_vcpu.c      Wed Oct 10 19:45:29 2007 +0900
@@ -171,23 +171,25 @@ IA64FAULT vmx_vcpu_set_rr(VCPU *vcpu, u6
     VMX(vcpu,vrr[reg>>VRN_SHIFT]) = val;
     switch((u64)(reg>>VRN_SHIFT)) {
     case VRN7:
-        vmx_switch_rr7(vrrtomrr(vcpu,val),
-                       (void *)vcpu->arch.vhpt.hash, pal_vaddr );
+        if (likely(vcpu == current))
+            vmx_switch_rr7(vrrtomrr(vcpu,val),
+                           (void *)vcpu->arch.vhpt.hash, pal_vaddr );
        break;
     case VRN4:
         rrval = vrrtomrr(vcpu,val);
         vcpu->arch.metaphysical_saved_rr4 = rrval;
-        if (is_virtual_mode(vcpu))
+        if (is_virtual_mode(vcpu) && likely(vcpu == current))
             ia64_set_rr(reg,rrval);
         break;
     case VRN0:
         rrval = vrrtomrr(vcpu,val);
         vcpu->arch.metaphysical_saved_rr0 = rrval;
-        if (is_virtual_mode(vcpu))
+        if (is_virtual_mode(vcpu) && likely(vcpu == current))
             ia64_set_rr(reg,rrval);
         break;
     default:
-        ia64_set_rr(reg,vrrtomrr(vcpu,val));
+        if (likely(vcpu == current))
+            ia64_set_rr(reg,vrrtomrr(vcpu,val));
         break;
     }

Attachment: 16063_905a46fbe0d8_make_vmx_vcpu_set_rr_accept_non_current.patch
Description: Text Data

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