Add an explicit exit code 'SPINUP_AP' to tell the controlling process that an

AP needs to be activated by spinning up an execution context for it.

The local apic emulation is now completely done in the hypervisor and it will
detect writes to the ICR_LO register that try to bring up the AP. In response
to such writes it will return to userspace with an exit code of SPINUP_AP.

Reviewed by: grehan

1 files changed, 5 insertions, 0 deletions

diff --git a/sys/amd64/include/vmm.h b/sys/amd64/include/vmm.h
index 61faf56..e841963 100644
--- a/sys/amd64/include/vmm.h
+++ b/sys/amd64/include/vmm.h
@@ -228,6 +228,7 @@ enum vm_exitcode {
 	VM_EXITCODE_MTRAP,
 	VM_EXITCODE_PAUSE,
 	VM_EXITCODE_PAGING,
+	VM_EXITCODE_SPINUP_AP,
 	VM_EXITCODE_MAX
 };
 
@@ -260,6 +261,10 @@ struct vm_exit {
 			uint32_t	code;		/* ecx value */
 			uint64_t	wval;
 		} msr;
+		struct {
+			int		vcpu;
+			uint64_t	rip;
+		} spinup_ap;
 	} u;
 };