[1/7] svm: Add test for selective cr0 intercept

Commit Message

Joerg Roedel Sept. 10, 2010, 3:34 p.m. UTC

None

Patch

diff --git a/x86/svm.c b/x86/svm.c
index 2f1c900..e65360e 100644
--- a/x86/svm.c
+++ b/x86/svm.c
@@ -357,6 +357,40 @@  static bool check_asid_zero(struct test *test)
     return test->vmcb->control.exit_code == SVM_EXIT_ERR;
 }
 
+static void sel_cr0_prepare(struct test *test)
+{
+    vmcb_ident(test->vmcb);
+    test->vmcb->control.intercept |= (1ULL << INTERCEPT_SELECTIVE_CR0);
+}
+
+static bool sel_cr0_finished(struct test *test)
+{
+	return true;
+}
+
+static void sel_cr0_test(struct test *test)
+{
+	unsigned long cr0;
+
+	/* read cr0, clear CD, and write back */
+	cr0  = read_cr0();
+	cr0 |= (1UL << 30);
+	write_cr0(cr0);
+
+	/*
+	 * If we are here the test failed, not sure what to do now because we
+	 * are not in guest-mode anymore so we can't trigger an intercept.
+	 * Trigger a tripple-fault for now.
+	 */
+	printf("sel_cr0 test failed. Can not recover from this - exiting\n");
+	exit(1);
+}
+
+static bool sel_cr0_check(struct test *test)
+{
+    return test->vmcb->control.exit_code == SVM_EXIT_CR0_SEL_WRITE;
+}
+
 static struct test tests[] = {
     { "null", default_supported, default_prepare, null_test,
       default_finished, null_check },
@@ -377,7 +411,8 @@  static struct test tests[] = {
        mode_switch_finished, check_mode_switch },
     { "asid_zero", default_supported, prepare_asid_zero, test_asid_zero,
        default_finished, check_asid_zero },
-
+    { "sel_cr0", default_supported, sel_cr0_prepare, sel_cr0_test,
+       sel_cr0_finished, sel_cr0_check },
 };
 
 int main(int ac, char **av)