text: /*
   * KVM_SET_SREGS tests
   *
   * Copyright (C) 2018, Google LLC.
   *
   * This work is licensed under the terms of the GNU GPL, version 2.
   *
   * This is a regression test for the bug fixed by the following commit:
   * d3802286fa0f ("kvm: x86: Disallow illegal IA32_APIC_BASE MSR values")
   *
   * That bug allowed a user-mode program that called the KVM_SET_SREGS
   * ioctl to put a VCPU's local APIC into an invalid state.
   *
   */
  #define _GNU_SOURCE /* for program_invocation_short_name */
  #include <fcntl.h>
  #include <stdio.h>
  #include <stdlib.h>
  #include <string.h>
  #include <sys/ioctl.h>
  
  #include "test_util.h"
  
  #include "kvm_util.h"
  #include "processor.h"
  
  #define VCPU_ID                  5
  
  int main(int argc, char *argv[])
  {
  	struct kvm_sregs sregs;
  	struct kvm_vm *vm;
  	int rc;
  
  	/* Tell stdout not to buffer its content */
  	setbuf(stdout, NULL);
  
  	/* Create VM */
  	vm = vm_create_default(VCPU_ID, 0, NULL);
  
  	vcpu_sregs_get(vm, VCPU_ID, &sregs);
  	sregs.apic_base = 1 << 10;
  	rc = _vcpu_sregs_set(vm, VCPU_ID, &sregs);
  	TEST_ASSERT(rc, "Set IA32_APIC_BASE to %llx (invalid)",
  		    sregs.apic_base);
  	sregs.apic_base = 1 << 11;
  	rc = _vcpu_sregs_set(vm, VCPU_ID, &sregs);
  	TEST_ASSERT(!rc, "Couldn't set IA32_APIC_BASE to %llx (valid)",
  		    sregs.apic_base);
  
  	kvm_vm_free(vm);
  
  	return 0;
  }
  