[kvm-unit-tests PATCH] kvm-unit-tests: vmx: add a test for injecting events to halted L2

[Chao Gao <chao.gao@intel.com>]

This patch leverages existing "interrupt" tests. What the patch does is L1
puts L2 in halt state and injects an event to L2. Then check a flag to
identify whether event injection succeeds or not.

Cc: Liran Alon <liran.alon@oracle.com>
Signed-off-by: Chao Gao <chao.gao@intel.com>
---
 x86/vmx_tests.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/x86/vmx_tests.c b/x86/vmx_tests.c
index 0c3b5a7..3c46d3a 100644
--- a/x86/vmx_tests.c
+++ b/x86/vmx_tests.c
@@ -1584,6 +1584,12 @@ static void interrupt_main(void)
 	for (loops = 0; loops < 10000000 && !timer_fired; loops++)
 		asm volatile ("nop");
 	report("running a guest with interrupt acknowledgement set", timer_fired);
+
+	apic_write(APIC_TMICT, 0);
+	irq_enable();
+	timer_fired = false;
+	vmcall();
+	report("Inject an event to a halted guest", timer_fired);
 }
 
 static int interrupt_exit_handler(void)
@@ -1615,6 +1621,12 @@ static int interrupt_exit_handler(void)
 		case 6:
 			vmcs_write(GUEST_ACTV_STATE, ACTV_HLT);
 			break;
+
+		case 8:
+			vmcs_write(GUEST_ACTV_STATE, ACTV_HLT);
+			vmcs_write(ENT_INTR_INFO,
+				   TIMER_VECTOR | INTR_INFO_VALID_MASK);
+			break;
 		}
 		vmx_inc_test_stage();
 		vmcs_write(GUEST_RIP, guest_rip + insn_len);
-- 
1.9.1