machine: query kernel-irqchip property

Running
    x86_64-softmmu/qemu-system-x86_64 -machine pc,kernel_irqchip=on -enable-kvm
leads to crash:
    qemu-system-x86_64: qemu/util/qemu-option.c:387: qemu_opt_get_bool_helper:
    Assertion `opt->desc && opt->desc->type == QEMU_OPT_BOOL' failed.  Aborted
    (core dumped)

This happens because the commit e79d5a6 ("machine: remove qemu_machine_opts
global list") removed the global option descriptions and moved them to
MachineState's QOM properties.

Fix this by querying machine properties through designated wrappers.

Signed-off-by: Marcel Apfelbaum <marcel@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

hw/ppc/e500.c

@@ -734,8 +734,8 @@ static DeviceState *ppce500_init_mpic_kvm(PPCE500Params *params,
     return dev;
 }
 
-static qemu_irq *ppce500_init_mpic(PPCE500Params *params, MemoryRegion *ccsr,
-                                   qemu_irq **irqs)
+static qemu_irq *ppce500_init_mpic(MachineState *machine, PPCE500Params *params,
+                                   MemoryRegion *ccsr, qemu_irq **irqs)
 {
     qemu_irq *mpic;
     DeviceState *dev = NULL;
@@ -745,17 +745,12 @@ static qemu_irq *ppce500_init_mpic(PPCE500Params *params, MemoryRegion *ccsr,
     mpic = g_new0(qemu_irq, 256);
 
     if (kvm_enabled()) {
-        QemuOpts *machine_opts = qemu_get_machine_opts();
-        bool irqchip_allowed = qemu_opt_get_bool(machine_opts,
-                                                "kernel_irqchip", true);
-        bool irqchip_required = qemu_opt_get_bool(machine_opts,
-                                                  "kernel_irqchip", false);
         Error *err = NULL;
 
-        if (irqchip_allowed) {
+        if (machine_kernel_irqchip_allowed(machine)) {
             dev = ppce500_init_mpic_kvm(params, irqs, &err);
         }
-        if (irqchip_required && !dev) {
+        if (machine_kernel_irqchip_required(machine) && !dev) {
             error_report("kernel_irqchip requested but unavailable: %s",
                          error_get_pretty(err));
             exit(1);
@@ -879,7 +874,7 @@ void ppce500_init(MachineState *machine, PPCE500Params *params)
     memory_region_add_subregion(address_space_mem, params->ccsrbar_base,
                                 ccsr_addr_space);
 
-    mpic = ppce500_init_mpic(params, ccsr_addr_space, irqs);
+    mpic = ppce500_init_mpic(machine, params, ccsr_addr_space, irqs);
 
     /* Serial */
     if (serial_hds[0]) {

hw/ppc/spapr.c

@@ -127,22 +127,18 @@ static XICSState *try_create_xics(const char *type, int nr_servers,
     return XICS_COMMON(dev);
 }
 
-static XICSState *xics_system_init(int nr_servers, int nr_irqs)
+static XICSState *xics_system_init(MachineState *machine,
+                                   int nr_servers, int nr_irqs)
 {
     XICSState *icp = NULL;
 
     if (kvm_enabled()) {
-        QemuOpts *machine_opts = qemu_get_machine_opts();
-        bool irqchip_allowed = qemu_opt_get_bool(machine_opts,
-                                                "kernel_irqchip", true);
-        bool irqchip_required = qemu_opt_get_bool(machine_opts,
-                                                  "kernel_irqchip", false);
         Error *err = NULL;
 
-        if (irqchip_allowed) {
+        if (machine_kernel_irqchip_allowed(machine)) {
             icp = try_create_xics(TYPE_KVM_XICS, nr_servers, nr_irqs, &err);
         }
-        if (irqchip_required && !icp) {
+        if (machine_kernel_irqchip_required(machine) && !icp) {
             error_report("kernel_irqchip requested but unavailable: %s",
                          error_get_pretty(err));
         }
@@ -1455,7 +1451,8 @@ static void ppc_spapr_init(MachineState *machine)
     }
 
     /* Set up Interrupt Controller before we create the VCPUs */
-    spapr->icp = xics_system_init(smp_cpus * kvmppc_smt_threads() / smp_threads,
+    spapr->icp = xics_system_init(machine,
+                                  smp_cpus * kvmppc_smt_threads() / smp_threads,
                                   XICS_IRQS);
 
     /* init CPUs */

kvm-all.c

@@ -1360,11 +1360,11 @@ int kvm_irqchip_remove_irqfd_notifier(KVMState *s, EventNotifier *n, int virq)
            false);
 }
 
-static int kvm_irqchip_create(KVMState *s)
+static int kvm_irqchip_create(MachineState *machine, KVMState *s)
 {
     int ret;
 
-    if (!qemu_opt_get_bool(qemu_get_machine_opts(), "kernel_irqchip", true) ||
+    if (!machine_kernel_irqchip_allowed(machine) ||
         (!kvm_check_extension(s, KVM_CAP_IRQCHIP) &&
          (kvm_vm_enable_cap(s, KVM_CAP_S390_IRQCHIP, 0) < 0))) {
         return 0;
@@ -1603,7 +1603,7 @@ static int kvm_init(MachineState *ms)
         goto err;
     }
 
-    ret = kvm_irqchip_create(s);
+    ret = kvm_irqchip_create(ms, s);
     if (ret < 0) {
         goto err;
     }