[patch v4 6/8] KVM: x86: call isolation prepare from VM-entry code path

[Marcelo Tosatti <mtosatti@redhat.com>]

VM-entry code path is an entry point similar to userspace return
when task isolation is concerned.

Call isolation_exit_to_user_mode_prepare before VM-enter.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

---
 arch/x86/kvm/x86.c |    3 +++
 1 file changed, 3 insertions(+)

Index: linux-2.6/arch/x86/kvm/x86.c
===================================================================
--- linux-2.6.orig/arch/x86/kvm/x86.c
+++ linux-2.6/arch/x86/kvm/x86.c
@@ -59,6 +59,7 @@
 #include <linux/mem_encrypt.h>
 #include <linux/entry-kvm.h>
 #include <linux/suspend.h>
+#include <linux/task_isolation.h>
 
 #include <trace/events/kvm.h>
 
@@ -9574,6 +9575,8 @@ static int vcpu_enter_guest(struct kvm_v
 		goto cancel_injection;
 	}
 
+	isolation_exit_to_user_mode_prepare();
+
 	preempt_disable();
 
 	static_call(kvm_x86_prepare_guest_switch)(vcpu);