// SPDX-License-Identifier: GPL-2.0-only
/*
 * svm_nested_shutdown_test
 *
 * Copyright (C) 2022, Red Hat, Inc.
 *
 * Nested SVM testing: test that unintercepted shutdown in L2 doesn't crash the host
 */

#include "test_util.h"
#include "kvm_util.h"
#include "processor.h"
#include "svm_util.h"

static void l2_guest_code(struct svm_test_data *svm)
{
        __asm__ __volatile__("ud2");
}

static void l1_guest_code(struct svm_test_data *svm, struct idt_entry *idt)
{
        #define L2_GUEST_STACK_SIZE 64
        unsigned long l2_guest_stack[L2_GUEST_STACK_SIZE];
        struct vmcb *vmcb = svm->vmcb;

        generic_svm_setup(svm, l2_guest_code,
                          &l2_guest_stack[L2_GUEST_STACK_SIZE]);

        vmcb->control.intercept &= ~(BIT(INTERCEPT_SHUTDOWN));

        idt[6].p   = 0; // #UD is intercepted but its injection will cause #NP
        idt[11].p  = 0; // #NP is not intercepted and will cause another
                        // #NP that will be converted to #DF
        idt[8].p   = 0; // #DF will cause #NP which will cause SHUTDOWN

        run_guest(vmcb, svm->vmcb_gpa);

        /* should not reach here */
        GUEST_ASSERT(0);
}

int main(int argc, char *argv[])
{
        struct kvm_vcpu *vcpu;
        gva_t svm_gva;
        struct kvm_vm *vm;

        TEST_REQUIRE(kvm_cpu_has(X86_FEATURE_SVM));

        vm = vm_create_with_one_vcpu(&vcpu, l1_guest_code);
        vcpu_alloc_svm(vm, &svm_gva);

        vcpu_args_set(vcpu, 2, svm_gva, vm->arch.idt);

        vcpu_run(vcpu);
        TEST_ASSERT_KVM_EXIT_REASON(vcpu, KVM_EXIT_SHUTDOWN);

        kvm_vm_free(vm);
}