linux-kernel - [PATCH kvm-unit-tests 2/2] svm: INIT intercept test

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Message-Id: <20200608122800.6315-3-cavery@redhat.com>
Date:   Mon,  8 Jun 2020 08:28:00 -0400
From:   Cathy Avery <cavery@...hat.com>
To:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        pbonzini@...hat.com
Subject: [PATCH kvm-unit-tests 2/2] svm: INIT intercept test

INIT vcpu 2 and intercept the INIT. This test
will leave the vcpu in an unusable state.

Signed-off-by: Cathy Avery <cavery@...hat.com>
---
 x86/svm_tests.c | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)

diff --git a/x86/svm_tests.c b/x86/svm_tests.c
index c1abd55..a4dbe91 100644
--- a/x86/svm_tests.c
+++ b/x86/svm_tests.c
@@ -1789,6 +1789,43 @@ static bool virq_inject_check(struct svm_test *test)
     return get_test_stage(test) == 5;
 }
 
+static volatile bool init_intercept;
+
+static void init_signal_intercept_prepare(struct svm_test *test)
+{
+
+    vmcb_ident(vmcb);
+    vmcb->control.intercept |= (1ULL << INTERCEPT_INIT);
+    init_intercept = false;
+}
+
+static void init_signal_test(struct svm_test *test)
+{
+    apic_icr_write(APIC_DEST_SELF | APIC_DEST_PHYSICAL | APIC_DM_INIT | APIC_INT_ASSERT, 0);
+}
+
+static bool init_signal_finished(struct svm_test *test)
+{
+    vmcb->save.rip += 3;
+
+    if (vmcb->control.exit_code != SVM_EXIT_INIT) {
+        report(false, "VMEXIT not due to init intercept. Exit reason 0x%x",
+               vmcb->control.exit_code);
+        return true;
+        }
+
+    init_intercept = true;
+
+    report(true, "INIT to vcpu intercepted");
+
+    return true;
+}
+
+static bool init_signal_check(struct svm_test *test)
+{
+    return init_intercept;
+}
+
 #define TEST(name) { #name, .v2 = name }
 
 /*
@@ -1950,6 +1987,9 @@ struct svm_test svm_tests[] = {
     { "virq_inject", default_supported, virq_inject_prepare,
       default_prepare_gif_clear, virq_inject_test,
       virq_inject_finished, virq_inject_check },
+    { "svm_init_signal_intercept_test", default_supported, init_signal_intercept_prepare,
+      default_prepare_gif_clear, init_signal_test,
+      init_signal_finished, init_signal_check, .on_vcpu = 2 },
     TEST(svm_guest_state_test),
     { NULL, NULL, NULL, NULL, NULL, NULL, NULL }
 };
-- 
2.20.1