4 * Copyright (C) 2018, Google LLC.
6 * This work is licensed under the terms of the GNU GPL, version 2.
8 * This is a regression test for the bug fixed by the following commit:
9 * d3802286fa0f ("kvm: x86: Disallow illegal IA32_APIC_BASE MSR values")
11 * That bug allowed a user-mode program that called the KVM_SET_SREGS
12 * ioctl to put a VCPU's local APIC into an invalid state.
15 #define _GNU_SOURCE /* for program_invocation_short_name */
20 #include <sys/ioctl.h>
22 #include "test_util.h"
29 int main(int argc, char *argv[])
31 struct kvm_sregs sregs;
35 /* Tell stdout not to buffer its content */
39 vm = vm_create_default(VCPU_ID, 0, NULL);
41 vcpu_sregs_get(vm, VCPU_ID, &sregs);
42 sregs.apic_base = 1 << 10;
43 rc = _vcpu_sregs_set(vm, VCPU_ID, &sregs);
44 TEST_ASSERT(rc, "Set IA32_APIC_BASE to %llx (invalid)",
46 sregs.apic_base = 1 << 11;
47 rc = _vcpu_sregs_set(vm, VCPU_ID, &sregs);
48 TEST_ASSERT(!rc, "Couldn't set IA32_APIC_BASE to %llx (valid)",