On 08/06/20 14:28, Cathy Avery wrote:
> INIT vcpu 2 and intercept the INIT. This test
> will leave the vcpu in an unusable state.
>
> Signed-off-by: Cathy Avery <cavery@xxxxxxxxxx>
It should be possible to reinitialize the vCPU using a SIPI interrupt, like
old = cpu_online_count--;
apic_icr_write(APIC_DEST_PHYSICAL | APIC_DEST_SIPI,
id_map[cpu]);
while (cpu_online_count != old)
cpu_relax();
You can test this by using vCPU 1 to run this test.
Paolo
> ---
> 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 }
> };
>
