[kvm-unit-tests PATCH 08/16] svm: add nested shutdown test.

[Maxim Levitsky <mlevitsk@xxxxxxxxxx>]

Test that if L2 triggers a shutdown, this VM exits to L1
and doesn't crash the host.

Signed-off-by: Maxim Levitsky <mlevitsk@xxxxxxxxxx>
---
 x86/svm_tests.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 51 insertions(+)

diff --git a/x86/svm_tests.c b/x86/svm_tests.c
index 19b35e95..2c29c2b0 100644
--- a/x86/svm_tests.c
+++ b/x86/svm_tests.c
@@ -10,6 +10,7 @@
 #include "isr.h"
 #include "apic.h"
 #include "delay.h"
+#include "vmalloc.h"
 
 #define SVM_EXIT_MAX_DR_INTERCEPT 0x3f
 
@@ -3270,6 +3271,55 @@ static void svm_intr_intercept_mix_smi(void)
 	svm_intr_intercept_mix_run_guest(NULL, SVM_EXIT_SMI);
 }
 
+
+static void shutdown_intercept_test_guest(struct svm_test *test)
+{
+	asm volatile ("int3");
+	report_fail("should not reach here\n");
+
+}
+
+static void shutdown_intercept_test_guest2(struct svm_test *test)
+{
+	asm volatile ("ud2");
+	report_fail("should not reach here\n");
+
+}
+
+static void svm_shutdown_intercept_test(void)
+{
+	void* unmapped_address = alloc_vpage();
+
+	/*
+	 * Test that shutdown vm exit doesn't crash L0
+	 *
+	 * Test both native and emulated triple fault
+	 * (due to exception merging)
+	 */
+
+
+	/*
+	 * This will usually cause native SVM_EXIT_SHUTDOWN
+	 * (KVM usually doesn't intercept #PF)
+	 * */
+	test_set_guest(shutdown_intercept_test_guest);
+	vmcb->save.idtr.base = (u64)unmapped_address;
+	vmcb->control.intercept |= (1ULL << INTERCEPT_SHUTDOWN);
+	svm_vmrun();
+	report (vmcb->control.exit_code == SVM_EXIT_SHUTDOWN, "shutdown (BP->PF->DF->TRIPLE_FAULT) test passed");
+
+	/*
+	 * This will usually cause emulated SVM_EXIT_SHUTDOWN
+	 * (KVM usually intercepts #UD)
+	 */
+	test_set_guest(shutdown_intercept_test_guest2);
+	vmcb_ident(vmcb);
+	vmcb->save.idtr.limit = 0;
+	vmcb->control.intercept |= (1ULL << INTERCEPT_SHUTDOWN);
+	svm_vmrun();
+	report (vmcb->control.exit_code == SVM_EXIT_SHUTDOWN, "shutdown (UD->DF->TRIPLE_FAULT) test passed");
+}
+
 struct svm_test svm_tests[] = {
 	{ "null", default_supported, default_prepare,
 	  default_prepare_gif_clear, null_test,
@@ -3382,6 +3432,7 @@ struct svm_test svm_tests[] = {
 	TEST(svm_intr_intercept_mix_smi),
 	TEST(svm_tsc_scale_test),
 	TEST(pause_filter_test),
+	TEST(svm_shutdown_intercept_test),
 	{ NULL, NULL, NULL, NULL, NULL, NULL, NULL }
 };
 
-- 
2.26.3