/* Is this a vmm specific thing? or generic?
*
* what do we do when we want to kill the vm? what are our other options? */
bool handle_vmexit(struct guest_thread *gth)
{
struct vm_trapframe *vm_tf = gth_to_vmtf(gth);
switch (vm_tf->tf_exit_reason) {
case EXIT_REASON_EPT_VIOLATION:
return handle_ept_fault(gth);
case EXIT_REASON_VMCALL:
return handle_vmcall(gth);
case EXIT_REASON_IO_INSTRUCTION:
return handle_io(gth);
case EXIT_REASON_MSR_WRITE:
case EXIT_REASON_MSR_READ:
return handle_msr(gth);
case EXIT_REASON_APIC_ACCESS:
return handle_apic_access(gth);
case EXIT_REASON_HLT:
return handle_halt(gth);
case EXIT_REASON_MWAIT_INSTRUCTION:
return handle_mwait(gth);
case EXIT_REASON_EXTERNAL_INTERRUPT:
case EXIT_REASON_APIC_WRITE:
/* TODO: just ignore these? */
return TRUE;
default:
fprintf(stderr, "Don't know how to handle exit %d\n",
vm_tf->tf_exit_reason);
fprintf(stderr, "RIP %p, shutdown 0x%x\n", vm_tf->tf_rip,
vm_tf->tf_exit_reason);
return FALSE;
}
}
/*
* System call handler
*
* retrieves system call number from user space
* and invokes the requested method
*/
static void
syscall_handler (struct intr_frame *f)
{
/* retrieve system call number
and switch to corresponding method */
unsigned int syscall_number = *((unsigned int*) syscall_get_kernel_address(f->esp));
switch(syscall_number)
{
/* process system calls */
case SYS_HALT:
handle_halt(f);
break;
case SYS_EXIT:
handle_exit(f);
break;
case SYS_EXEC:
handle_exec(f);
break;
case SYS_WAIT:
handle_wait(f);
break;
/* file system calls */
case SYS_CREATE:
handle_create(f);
break;
case SYS_REMOVE:
handle_remove(f);
break;
case SYS_OPEN:
handle_open(f);
break;
case SYS_FILESIZE:
handle_filesize(f);
break;
case SYS_READ:
handle_read(f);
break;
case SYS_WRITE:
handle_write(f);
break;
case SYS_SEEK:
handle_seek(f);
break;
case SYS_TELL:
handle_tell(f);
break;
case SYS_CLOSE:
handle_close(f);
break;
case SYS_CHDIR:
handle_chdir(f);
break;
case SYS_MKDIR:
handle_mkdir(f);
break;
case SYS_READDIR:
handle_readdir(f);
break;
case SYS_ISDIR:
handle_isdir(f);
break;
case SYS_INUMBER:
handle_inumber(f);
break;
default: /* SYSCALL_ERROR: */
handle_no_such_syscall(f);
break;
}
}
int kvm_run(kvm_context_t kvm, int vcpu)
{
int r;
int fd = kvm->vcpu_fd[vcpu];
struct kvm_run *run = kvm->run[vcpu];
/*if (kvm_abi == 10)
return kvm_run_abi10(kvm, vcpu);*/
again:
// if (!kvm->irqchip_in_kernel)
// run->request_interrupt_window = try_push_interrupts(kvm);
//r = pre_kvm_run(kvm, vcpu);
//if (r)
// return r;
r = ioctl(fd, KVM_RUN, 0);
printf("here\n");
//post_kvm_run(kvm, vcpu);
if (r == -1 && errno != EINTR && errno != EAGAIN) {
r = -errno;
printf("kvm_run: %m\n");
return r;
}
if (r == -1) {
r = handle_io_window(kvm);
goto more;
}
if (1) {
switch (run->exit_reason) {
case KVM_EXIT_UNKNOWN:
fprintf(stderr, "unhandled vm exit: 0x%x\n",
(unsigned)run->hw.hardware_exit_reason);
kvm_show_regs(kvm, vcpu);
abort();
break;
case KVM_EXIT_FAIL_ENTRY:
fprintf(stderr, "kvm_run: failed entry, reason %u\n",
(unsigned)run->fail_entry.hardware_entry_failure_reason & 0xffff);
return -ENOEXEC;
break;
case KVM_EXIT_EXCEPTION:
fprintf(stderr, "exception %d (%x)\n",
run->ex.exception,
run->ex.error_code);
kvm_show_regs(kvm, vcpu);
kvm_show_code(kvm, vcpu);
abort();
break;
case KVM_EXIT_IO:
r = handle_io(kvm, run, vcpu);
break;
case KVM_EXIT_DEBUG:
r = handle_debug(kvm, vcpu);
break;
case KVM_EXIT_MMIO:
r = handle_mmio(kvm, run);
break;
case KVM_EXIT_HLT:
r = handle_halt(kvm, vcpu);
break;
case KVM_EXIT_IRQ_WINDOW_OPEN:
break;
case KVM_EXIT_SHUTDOWN:
r = handle_shutdown(kvm, vcpu);
break;
case KVM_EXIT_SET_TPR:
break;
default:
fprintf(stderr, "unhandled vm exit: 0x%x\n", run->exit_reason);
kvm_show_regs(kvm, vcpu);
abort();
break;
}
}
more:
if (!r)
goto again;
return r;
}
int __cdecl kvm_run(kvm_context_t kvm, int vcpu)
{
int r = 0;
int fd = kvm->vcpu_fd[vcpu];
struct kvm_run kvm_run;
int retlen;
BOOL ret = FALSE;
kvm_run.emulated = 0;
kvm_run.mmio_completed = 0;
kvm_run.vcpu_fd = fd;
again:
kvm_run.request_interrupt_window = try_push_interrupts(kvm);
pre_kvm_run(kvm, &kvm_run);
/* r = ioctl(fd, KVM_RUN, &kvm_run); */
ret = DeviceIoControl(
kvm->hnd,
KVM_RUN,
&kvm_run,
sizeof(kvm_run),
&kvm_run,
sizeof(kvm_run),
&retlen,
NULL);
if (retlen != sizeof(kvm_run)) {
fprintf(stderr, "kvm_run: invalid return value\n");
return r;
}
post_kvm_run(kvm, &kvm_run);
kvm_run.emulated = 0;
kvm_run.mmio_completed = 0;
if (!ret) {
fprintf(stderr, "kvm_run: failed\n");
return -1;
}
if (kvm_run.ioctl_r == -1 && kvm_run._errno != EINTR) {
r = -(kvm_run._errno);
fprintf(stderr, "kvm_run: %d\n", kvm_run._errno);
return r;
}
if (kvm_run.ioctl_r == -1) {
r = handle_io_window(kvm, &kvm_run);
goto more;
}
/*
if (kvm_run.ioctl_r == -EINTR) {
r = handle_io_window(kvm, &kvm_run);
r = 1;
goto more;
}
*/
switch (kvm_run.exit_type) {
case KVM_EXIT_TYPE_FAIL_ENTRY:
fprintf(stderr, "kvm_run: failed entry, reason %u\n",
kvm_run.exit_reason & 0xffff);
return -ENOEXEC;
break;
case KVM_EXIT_TYPE_VM_EXIT:
switch (kvm_run.exit_reason) {
case KVM_EXIT_UNKNOWN:
fprintf(stderr, "unhandled vm exit: 0x%x\n",
kvm_run.hw.hardware_exit_reason);
kvm_show_regs(kvm, vcpu);
abort();
break;
case KVM_EXIT_EXCEPTION:
fprintf(stderr, "exception %d (%x)\n",
kvm_run.ex.exception,
kvm_run.ex.error_code);
kvm_show_regs(kvm, vcpu);
abort();
break;
case KVM_EXIT_IO:
r = handle_io(kvm, &kvm_run, vcpu);
break;
case KVM_EXIT_CPUID:
r = handle_cpuid(kvm, &kvm_run, vcpu);
break;
case KVM_EXIT_DEBUG:
r = handle_debug(kvm, &kvm_run, vcpu);
break;
case KVM_EXIT_MMIO:
r = handle_mmio(kvm, &kvm_run);
break;
case KVM_EXIT_HLT:
r = handle_halt(kvm, &kvm_run, vcpu);
break;
case KVM_EXIT_IRQ_WINDOW_OPEN:
break;
case KVM_EXIT_SHUTDOWN:
r = handle_shutdown(kvm, &kvm_run, vcpu);
break;
default:
fprintf(stderr, "unhandled vm exit: 0x%x\n", kvm_run.exit_reason);
kvm_show_regs(kvm, vcpu);
abort();
break;
}
}
more:
if (!r)
goto again;
return r;
}
