96 lines
2.2 KiB
C
96 lines
2.2 KiB
C
/*
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* Xen basic APIC support
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*
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* Copyright (c) 2012 Citrix
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*
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* Authors:
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* Wei Liu <wei.liu2@citrix.com>
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*
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* This work is licensed under the terms of the GNU GPL version 2 or
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* later. See the COPYING file in the top-level directory.
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*/
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#include "hw/i386/apic_internal.h"
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#include "hw/pci/msi.h"
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#include "hw/xen/xen.h"
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static uint64_t xen_apic_mem_read(void *opaque, hwaddr addr,
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unsigned size)
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{
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return ~(uint64_t)0;
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}
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static void xen_apic_mem_write(void *opaque, hwaddr addr,
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uint64_t data, unsigned size)
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{
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if (size != sizeof(uint32_t)) {
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fprintf(stderr, "Xen: APIC write data size = %d, invalid\n", size);
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return;
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}
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xen_hvm_inject_msi(addr, data);
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}
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static const MemoryRegionOps xen_apic_io_ops = {
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.read = xen_apic_mem_read,
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.write = xen_apic_mem_write,
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.endianness = DEVICE_NATIVE_ENDIAN,
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};
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static void xen_apic_init(APICCommonState *s)
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{
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memory_region_init_io(&s->io_memory, OBJECT(s), &xen_apic_io_ops, s,
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"xen-apic-msi", APIC_SPACE_SIZE);
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#if defined(CONFIG_XEN_CTRL_INTERFACE_VERSION) \
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&& CONFIG_XEN_CTRL_INTERFACE_VERSION >= 420
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msi_supported = true;
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#endif
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}
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static void xen_apic_set_base(APICCommonState *s, uint64_t val)
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{
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}
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static void xen_apic_set_tpr(APICCommonState *s, uint8_t val)
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{
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}
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static uint8_t xen_apic_get_tpr(APICCommonState *s)
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{
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return 0;
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}
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static void xen_apic_vapic_base_update(APICCommonState *s)
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{
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}
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static void xen_apic_external_nmi(APICCommonState *s)
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{
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}
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static void xen_apic_class_init(ObjectClass *klass, void *data)
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{
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APICCommonClass *k = APIC_COMMON_CLASS(klass);
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k->init = xen_apic_init;
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k->set_base = xen_apic_set_base;
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k->set_tpr = xen_apic_set_tpr;
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k->get_tpr = xen_apic_get_tpr;
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k->vapic_base_update = xen_apic_vapic_base_update;
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k->external_nmi = xen_apic_external_nmi;
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}
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static const TypeInfo xen_apic_info = {
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.name = "xen-apic",
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.parent = TYPE_APIC_COMMON,
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.instance_size = sizeof(APICCommonState),
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.class_init = xen_apic_class_init,
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};
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static void xen_apic_register_types(void)
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{
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type_register_static(&xen_apic_info);
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}
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type_init(xen_apic_register_types)
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