If VMLOAD/VMSAVE intercepts are disabled, no respective #VMEXIT to host
happens. Enabling VMLOAD/VMSAVE intercept will cause respective #VMEXIT
to host.
Signed-off-by: Krish Sadhukhan <krish.sadhukhan@xxxxxxxxxx>
---
x86/svm_tests.c | 64 +++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 64 insertions(+)
diff --git a/x86/svm_tests.c b/x86/svm_tests.c
index 29a0b59..7f4e63e 100644
--- a/x86/svm_tests.c
+++ b/x86/svm_tests.c
@@ -2382,6 +2382,69 @@ static void svm_vmrun_errata_test(void)
}
}
+static void vmload_vmsave_guest_main(struct svm_test *test)
+{
+ u64 vmcb_phys = virt_to_phys(vmcb);
+
+ asm volatile ("vmload %0" : : "a"(vmcb_phys));
+ asm volatile ("vmsave %0" : : "a"(vmcb_phys));
+}
+
+static void svm_vmload_vmsave(void)
+{
+ u32 intercept_saved = vmcb->control.intercept;
+
+ test_set_guest(vmload_vmsave_guest_main);
+
+ /*
+ * Disabling intercept for VMLOAD and VMSAVE doesn't cause
+ * respective #VMEXIT to host
+ */
+ vmcb->control.intercept &= ~(1ULL << INTERCEPT_VMLOAD);
+ vmcb->control.intercept &= ~(1ULL << INTERCEPT_VMSAVE);
+ svm_vmrun();
+ report(vmcb->control.exit_code == SVM_EXIT_VMMCALL, "Test "
+ "VMLOAD/VMSAVE intercept: Expected VMMCALL #VMEXIT");
+
+ /*
+ * Enabling intercept for VMLOAD and VMSAVE causes respective
+ * #VMEXIT to host
+ */
+ vmcb->control.intercept |= (1ULL << INTERCEPT_VMLOAD);
+ svm_vmrun();
+ report(vmcb->control.exit_code == SVM_EXIT_VMLOAD, "Test "
+ "VMLOAD/VMSAVE intercept: Expected VMLOAD #VMEXIT");
+ vmcb->control.intercept &= ~(1ULL << INTERCEPT_VMLOAD);
+ vmcb->control.intercept |= (1ULL << INTERCEPT_VMSAVE);
+ svm_vmrun();
+ report(vmcb->control.exit_code == SVM_EXIT_VMSAVE, "Test "
+ "VMLOAD/VMSAVE intercept: Expected VMSAVE #VMEXIT");
+ vmcb->control.intercept &= ~(1ULL << INTERCEPT_VMSAVE);
+ svm_vmrun();
+ report(vmcb->control.exit_code == SVM_EXIT_VMMCALL, "Test "
+ "VMLOAD/VMSAVE intercept: Expected VMMCALL #VMEXIT");
+
+ vmcb->control.intercept |= (1ULL << INTERCEPT_VMLOAD);
+ svm_vmrun();
+ report(vmcb->control.exit_code == SVM_EXIT_VMLOAD, "Test "
+ "VMLOAD/VMSAVE intercept: Expected VMLOAD #VMEXIT");
+ vmcb->control.intercept &= ~(1ULL << INTERCEPT_VMLOAD);
+ svm_vmrun();
+ report(vmcb->control.exit_code == SVM_EXIT_VMMCALL, "Test "
+ "VMLOAD/VMSAVE intercept: Expected VMMCALL #VMEXIT");
+
+ vmcb->control.intercept |= (1ULL << INTERCEPT_VMSAVE);
+ svm_vmrun();
+ report(vmcb->control.exit_code == SVM_EXIT_VMSAVE, "Test "
+ "VMLOAD/VMSAVE intercept: Expected VMSAVE #VMEXIT");
+ vmcb->control.intercept &= ~(1ULL << INTERCEPT_VMSAVE);
+ svm_vmrun();
+ report(vmcb->control.exit_code == SVM_EXIT_VMMCALL, "Test "
+ "VMLOAD/VMSAVE intercept: Expected VMMCALL #VMEXIT");
+
+ vmcb->control.intercept = intercept_saved;
+}
+
struct svm_test svm_tests[] = {
{ "null", default_supported, default_prepare,
default_prepare_gif_clear, null_test,
@@ -2495,5 +2558,6 @@ struct svm_test svm_tests[] = {
TEST(svm_cr4_osxsave_test),
TEST(svm_guest_state_test),
TEST(svm_vmrun_errata_test),
+ TEST(svm_vmload_vmsave),
{ NULL, NULL, NULL, NULL, NULL, NULL, NULL }
};
--
2.27.0
