[RFC PATCH v2 3/4] KVM: x86: add VTL-call state to struct kvm_vcpu_common

[Sriram Nambakam <snambakam@linux.microsoft.com>]

Add the shared state used by the in-kernel VBS VTL call/return handlers:

  vtl_call_ca       - guest-physical address of the shared calling area
  vtl_call_pending  - a call arrived while the secure plane was booting
  vtl_plane_ready   - the secure plane has parked in its VTL return

The fields live in struct kvm_vcpu_common so they are shared across a
logical CPU's plane vCPUs.
---
 include/linux/kvm_host.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index a61524ab0d94..61bb59c50ae6 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -386,6 +386,11 @@ struct kvm_vcpu_common {
 
 	bool plane_switch;
 
+	/* VBS VTL-call state, shared across this CPU's plane vCPUs. */
+	gpa_t vtl_call_ca;
+	bool vtl_call_pending;
+	bool vtl_plane_ready;
+
 	struct kvm_vcpu_arch_common arch;
 };
 
-- 
2.55.0