// 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; vm_vaddr_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); vm_init_descriptor_tables(vm); vcpu_init_descriptor_tables(vcpu); vcpu_alloc_svm(vm, &svm_gva); vcpu_args_set(vcpu, 2, svm_gva, vm->idt); vcpu_run(vcpu); TEST_ASSERT_KVM_EXIT_REASON(vcpu, KVM_EXIT_SHUTDOWN); kvm_vm_free(vm); }