x86/migrate: Move MSR_SPEC_CTRL on migrate

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Wei Liu <wei.liu2@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>

xen/arch/x86/domctl.c

@@ -1284,6 +1284,7 @@ long arch_do_domctl(
         struct xen_domctl_vcpu_msr msr = {};
         struct vcpu *v;
         static const uint32_t msrs_to_send[] = {
+            MSR_SPEC_CTRL,
             MSR_INTEL_MISC_FEATURES_ENABLES,
         };
         uint32_t nr_msrs = ARRAY_SIZE(msrs_to_send);
@@ -1407,6 +1408,7 @@ long arch_do_domctl(
 
                 switch ( msr.index )
                 {
+                case MSR_SPEC_CTRL:
                 case MSR_INTEL_MISC_FEATURES_ENABLES:
                     if ( guest_wrmsr(v, msr.index, msr.value) != X86EMUL_OKAY )
                         break;

xen/arch/x86/hvm/hvm.c

@@ -1327,6 +1327,7 @@ static int hvm_load_cpu_xsave_states(struct domain *d, hvm_domain_context_t *h)
 
 #define HVM_CPU_MSR_SIZE(cnt) offsetof(struct hvm_msr, msr[cnt])
 static const uint32_t msrs_to_send[] = {
+    MSR_SPEC_CTRL,
     MSR_INTEL_MISC_FEATURES_ENABLES,
 };
 static unsigned int __read_mostly msr_count_max = ARRAY_SIZE(msrs_to_send);
@@ -1462,6 +1463,7 @@ static int hvm_load_cpu_msrs(struct domain *d, hvm_domain_context_t *h)
         {
             int rc;
 
+        case MSR_SPEC_CTRL:
         case MSR_INTEL_MISC_FEATURES_ENABLES:
             rc = guest_wrmsr(v, ctxt->msr[i].index, ctxt->msr[i].val);