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// 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);
}
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