Re: [Xen-devel] [PATCH V10 for-4.5 3/4] xen, libxc: Force-enable relevant MSR events

[Tamas K Lengyel <tamas.lengyel@xxxxxxxxxxxx>]

diff --git a/xen/arch/x86/mm/mem_event.c b/xen/arch/x86/mm/mem_event.c
index ba7e71e..fdd5ff6 100644
--- a/xen/arch/x86/mm/mem_event.c
+++ b/xen/arch/x86/mm/mem_event.c
@@ -587,6 +587,7 @@ int mem_event_domctl(struct domain *d, xen_domctl_mem_event_op_t *mec,
         switch( mec->op )
         {
         case XEN_DOMCTL_MEM_EVENT_OP_ACCESS_ENABLE:
+        case XEN_DOMCTL_MEM_EVENT_OP_ACCESS_ENABLE_INTROSPECTION:
         {
             rc = -ENODEV;
             /* Only HAP is supported */
@@ -600,13 +601,23 @@ int mem_event_domctl(struct domain *d, xen_domctl_mem_event_op_t *mec,
             rc = mem_event_enable(d, mec, med, _VPF_mem_access,
                                     HVM_PARAM_ACCESS_RING_PFN,
                                     mem_access_notification);
+
+            if ( mec->op != XEN_DOMCTL_MEM_EVENT_OP_ACCESS_ENABLE &&
+                 rc == 0 && hvm_funcs.enable_msr_exit_interception )
+            {
+                d->arch.hvm_domain.introspection_enabled = 1;
+                hvm_funcs.enable_msr_exit_interception(d);
+            }

I guess I should have spoken up before this got merged, but it would have been better to keep x86 hvm specific code abstracted out here considering this function is being moved into common in my series and hvm_funcs are not defined for ARM.

Tamas

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