1 /*
2 * QEMU ARM Xen PVH Machine
3 *
4 * SPDX-License-Identifier: MIT
5 */
6
7 #include "qemu/osdep.h"
8 #include "qemu/error-report.h"
9 #include "qapi/qapi-commands-migration.h"
10 #include "hw/boards.h"
11 #include "system/system.h"
12 #include "hw/xen/xen-pvh-common.h"
13
14 #define TYPE_XEN_ARM MACHINE_TYPE_NAME("xenpvh")
15
16 /*
17 * VIRTIO_MMIO_DEV_SIZE is imported from tools/libs/light/libxl_arm.c under Xen
18 * repository.
19 *
20 * Origin: git://xenbits.xen.org/xen.git 2128143c114c
21 */
22 #define VIRTIO_MMIO_DEV_SIZE 0x200
23
24 #define NR_VIRTIO_MMIO_DEVICES \
25 (GUEST_VIRTIO_MMIO_SPI_LAST - GUEST_VIRTIO_MMIO_SPI_FIRST)
26
xen_arm_instance_init(Object * obj)27 static void xen_arm_instance_init(Object *obj)
28 {
29 XenPVHMachineState *s = XEN_PVH_MACHINE(obj);
30
31 /* Default values. */
32 s->cfg.ram_low = (MemMapEntry) { GUEST_RAM0_BASE, GUEST_RAM0_SIZE };
33 s->cfg.ram_high = (MemMapEntry) { GUEST_RAM1_BASE, GUEST_RAM1_SIZE };
34
35 s->cfg.virtio_mmio_num = NR_VIRTIO_MMIO_DEVICES;
36 s->cfg.virtio_mmio_irq_base = GUEST_VIRTIO_MMIO_SPI_FIRST;
37 s->cfg.virtio_mmio = (MemMapEntry) { GUEST_VIRTIO_MMIO_BASE,
38 VIRTIO_MMIO_DEV_SIZE };
39 }
40
xen_pvh_set_pci_intx_irq(void * opaque,int intx_irq,int level)41 static void xen_pvh_set_pci_intx_irq(void *opaque, int intx_irq, int level)
42 {
43 XenPVHMachineState *s = XEN_PVH_MACHINE(opaque);
44 int irq = s->cfg.pci_intx_irq_base + intx_irq;
45
46 if (xendevicemodel_set_irq_level(xen_dmod, xen_domid, irq, level)) {
47 error_report("xendevicemodel_set_pci_intx_level failed");
48 }
49 }
50
xen_arm_machine_class_init(ObjectClass * oc,const void * data)51 static void xen_arm_machine_class_init(ObjectClass *oc, const void *data)
52 {
53 XenPVHMachineClass *xpc = XEN_PVH_MACHINE_CLASS(oc);
54 MachineClass *mc = MACHINE_CLASS(oc);
55
56 mc->desc = "Xen PVH ARM machine";
57
58 /*
59 * mc->max_cpus holds the MAX value allowed in the -smp command-line opts.
60 *
61 * 1. If users don't pass any -smp option:
62 * ms->smp.cpus will default to 1.
63 * ms->smp.max_cpus will default to 1.
64 *
65 * 2. If users pass -smp X:
66 * ms->smp.cpus will be set to X.
67 * ms->smp.max_cpus will also be set to X.
68 *
69 * 3. If users pass -smp X,maxcpus=Y:
70 * ms->smp.cpus will be set to X.
71 * ms->smp.max_cpus will be set to Y.
72 *
73 * In scenarios 2 and 3, if X or Y are set to something larger than
74 * mc->max_cpus, QEMU will bail out with an error message.
75 */
76 mc->max_cpus = GUEST_MAX_VCPUS;
77
78 /* Xen/ARM does not use buffered IOREQs. */
79 xpc->handle_bufioreq = HVM_IOREQSRV_BUFIOREQ_OFF;
80
81 /* PCI INTX delivery. */
82 xpc->set_pci_intx_irq = xen_pvh_set_pci_intx_irq;
83
84 /* List of supported features known to work on PVH ARM. */
85 xpc->has_pci = true;
86 xpc->has_tpm = true;
87 xpc->has_virtio_mmio = true;
88
89 xen_pvh_class_setup_common_props(xpc);
90 }
91
92 static const TypeInfo xen_arm_machine_type = {
93 .name = TYPE_XEN_ARM,
94 .parent = TYPE_XEN_PVH_MACHINE,
95 .class_init = xen_arm_machine_class_init,
96 .instance_size = sizeof(XenPVHMachineState),
97 .instance_init = xen_arm_instance_init,
98 };
99
xen_arm_machine_register_types(void)100 static void xen_arm_machine_register_types(void)
101 {
102 type_register_static(&xen_arm_machine_type);
103 }
104
105 type_init(xen_arm_machine_register_types)
106