2 * XEN platform pci device, formerly known as the event channel device
4 * Copyright (c) 2003-2004 Intel Corp.
5 * Copyright (c) 2006 XenSource
7 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 * of this software and associated documentation files (the "Software"), to deal
9 * in the Software without restriction, including without limitation the rights
10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11 * copies of the Software, and to permit persons to whom the Software is
12 * furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
32 #include "xen_common.h"
34 #include "xen_backend.h"
36 #include "exec-memory.h"
40 //#define DEBUG_PLATFORM
43 #define DPRINTF(fmt, ...) do { \
44 fprintf(stderr, "xen_platform: " fmt, ## __VA_ARGS__); \
47 #define DPRINTF(fmt, ...) do { } while (0)
50 #define PFFLAG_ROM_LOCK 1 /* Sets whether ROM memory area is RW or RO */
52 typedef struct PCIXenPlatformState {
54 MemoryRegion fixed_io;
56 MemoryRegion mmio_bar;
57 uint8_t flags; /* used only for version_id == 2 */
58 int drivers_blacklisted;
59 uint16_t driver_product_version;
61 /* Log from guest drivers */
62 char log_buffer[4096];
64 } PCIXenPlatformState;
66 #define XEN_PLATFORM_IOPORT 0x10
68 /* Send bytes to syslog */
69 static void log_writeb(PCIXenPlatformState *s, char val)
71 if (val == '\n' || s->log_buffer_off == sizeof(s->log_buffer) - 1) {
73 s->log_buffer[s->log_buffer_off] = 0;
74 trace_xen_platform_log(s->log_buffer);
75 s->log_buffer_off = 0;
77 s->log_buffer[s->log_buffer_off++] = val;
81 /* Xen Platform, Fixed IOPort */
82 #define UNPLUG_ALL_IDE_DISKS 1
83 #define UNPLUG_ALL_NICS 2
84 #define UNPLUG_AUX_IDE_DISKS 4
86 static void unplug_nic(PCIBus *b, PCIDevice *d, void *o)
88 /* We have to ignore passthrough devices */
89 if (pci_get_word(d->config + PCI_CLASS_DEVICE) ==
90 PCI_CLASS_NETWORK_ETHERNET
91 && strcmp(d->name, "xen-pci-passthrough") != 0) {
96 static void pci_unplug_nics(PCIBus *bus)
98 pci_for_each_device(bus, 0, unplug_nic, NULL);
101 static void unplug_disks(PCIBus *b, PCIDevice *d, void *o)
103 /* We have to ignore passthrough devices */
104 if (pci_get_word(d->config + PCI_CLASS_DEVICE) ==
105 PCI_CLASS_STORAGE_IDE
106 && strcmp(d->name, "xen-pci-passthrough") != 0) {
107 qdev_unplug(&(d->qdev), NULL);
111 static void pci_unplug_disks(PCIBus *bus)
113 pci_for_each_device(bus, 0, unplug_disks, NULL);
116 static void platform_fixed_ioport_writew(void *opaque, uint32_t addr, uint32_t val)
118 PCIXenPlatformState *s = opaque;
122 /* Unplug devices. Value is a bitmask of which devices to
123 unplug, with bit 0 the IDE devices, bit 1 the network
124 devices, and bit 2 the non-primary-master IDE devices. */
125 if (val & UNPLUG_ALL_IDE_DISKS) {
126 DPRINTF("unplug disks\n");
129 pci_unplug_disks(s->pci_dev.bus);
131 if (val & UNPLUG_ALL_NICS) {
132 DPRINTF("unplug nics\n");
133 pci_unplug_nics(s->pci_dev.bus);
135 if (val & UNPLUG_AUX_IDE_DISKS) {
136 DPRINTF("unplug auxiliary disks not supported\n");
142 DPRINTF("Citrix Windows PV drivers loaded in guest\n");
145 DPRINTF("Guest claimed to be running PV product 0?\n");
148 DPRINTF("Unknown PV product %d loaded in guest\n", val);
151 s->driver_product_version = val;
156 static void platform_fixed_ioport_writel(void *opaque, uint32_t addr,
161 /* PV driver version */
166 static void platform_fixed_ioport_writeb(void *opaque, uint32_t addr, uint32_t val)
168 PCIXenPlatformState *s = opaque;
171 case 0: /* Platform flags */ {
172 hvmmem_type_t mem_type = (val & PFFLAG_ROM_LOCK) ?
173 HVMMEM_ram_ro : HVMMEM_ram_rw;
174 if (xc_hvm_set_mem_type(xen_xc, xen_domid, mem_type, 0xc0, 0x40)) {
175 DPRINTF("unable to change ro/rw state of ROM memory area!\n");
177 s->flags = val & PFFLAG_ROM_LOCK;
178 DPRINTF("changed ro/rw state of ROM memory area. now is %s state.\n",
179 (mem_type == HVMMEM_ram_ro ? "ro":"rw"));
189 static uint32_t platform_fixed_ioport_readw(void *opaque, uint32_t addr)
191 PCIXenPlatformState *s = opaque;
195 if (s->drivers_blacklisted) {
196 /* The drivers will recognise this magic number and refuse
200 /* Magic value so that you can identify the interface. */
208 static uint32_t platform_fixed_ioport_readb(void *opaque, uint32_t addr)
210 PCIXenPlatformState *s = opaque;
224 static void platform_fixed_ioport_reset(void *opaque)
226 PCIXenPlatformState *s = opaque;
228 platform_fixed_ioport_writeb(s, 0, 0);
231 const MemoryRegionPortio xen_platform_ioport[] = {
232 { 0, 16, 4, .write = platform_fixed_ioport_writel, },
233 { 0, 16, 2, .write = platform_fixed_ioport_writew, },
234 { 0, 16, 1, .write = platform_fixed_ioport_writeb, },
235 { 0, 16, 2, .read = platform_fixed_ioport_readw, },
236 { 0, 16, 1, .read = platform_fixed_ioport_readb, },
240 static const MemoryRegionOps platform_fixed_io_ops = {
241 .old_portio = xen_platform_ioport,
242 .endianness = DEVICE_NATIVE_ENDIAN,
245 static void platform_fixed_ioport_init(PCIXenPlatformState* s)
247 memory_region_init_io(&s->fixed_io, &platform_fixed_io_ops, s,
249 memory_region_add_subregion(get_system_io(), XEN_PLATFORM_IOPORT,
253 /* Xen Platform PCI Device */
255 static uint32_t xen_platform_ioport_readb(void *opaque, uint32_t addr)
258 return platform_fixed_ioport_readb(opaque, 0);
264 static void xen_platform_ioport_writeb(void *opaque, uint32_t addr, uint32_t val)
266 PCIXenPlatformState *s = opaque;
269 case 0: /* Platform flags */
270 platform_fixed_ioport_writeb(opaque, 0, val);
280 static MemoryRegionPortio xen_pci_portio[] = {
281 { 0, 0x100, 1, .read = xen_platform_ioport_readb, },
282 { 0, 0x100, 1, .write = xen_platform_ioport_writeb, },
286 static const MemoryRegionOps xen_pci_io_ops = {
287 .old_portio = xen_pci_portio,
290 static void platform_ioport_bar_setup(PCIXenPlatformState *d)
292 memory_region_init_io(&d->bar, &xen_pci_io_ops, d, "xen-pci", 0x100);
295 static uint64_t platform_mmio_read(void *opaque, target_phys_addr_t addr,
298 DPRINTF("Warning: attempted read from physical address "
299 "0x" TARGET_FMT_plx " in xen platform mmio space\n", addr);
304 static void platform_mmio_write(void *opaque, target_phys_addr_t addr,
305 uint64_t val, unsigned size)
307 DPRINTF("Warning: attempted write of 0x%"PRIx64" to physical "
308 "address 0x" TARGET_FMT_plx " in xen platform mmio space\n",
312 static const MemoryRegionOps platform_mmio_handler = {
313 .read = &platform_mmio_read,
314 .write = &platform_mmio_write,
315 .endianness = DEVICE_NATIVE_ENDIAN,
318 static void platform_mmio_setup(PCIXenPlatformState *d)
320 memory_region_init_io(&d->mmio_bar, &platform_mmio_handler, d,
321 "xen-mmio", 0x1000000);
324 static int xen_platform_post_load(void *opaque, int version_id)
326 PCIXenPlatformState *s = opaque;
328 platform_fixed_ioport_writeb(s, 0, s->flags);
333 static const VMStateDescription vmstate_xen_platform = {
336 .minimum_version_id = 4,
337 .minimum_version_id_old = 4,
338 .post_load = xen_platform_post_load,
339 .fields = (VMStateField []) {
340 VMSTATE_PCI_DEVICE(pci_dev, PCIXenPlatformState),
341 VMSTATE_UINT8(flags, PCIXenPlatformState),
342 VMSTATE_END_OF_LIST()
346 static int xen_platform_initfn(PCIDevice *dev)
348 PCIXenPlatformState *d = DO_UPCAST(PCIXenPlatformState, pci_dev, dev);
351 pci_conf = d->pci_dev.config;
353 pci_set_word(pci_conf + PCI_COMMAND, PCI_COMMAND_IO | PCI_COMMAND_MEMORY);
355 pci_config_set_prog_interface(pci_conf, 0);
357 pci_conf[PCI_INTERRUPT_PIN] = 1;
359 platform_ioport_bar_setup(d);
360 pci_register_bar(&d->pci_dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &d->bar);
362 /* reserve 16MB mmio address for share memory*/
363 platform_mmio_setup(d);
364 pci_register_bar(&d->pci_dev, 1, PCI_BASE_ADDRESS_MEM_PREFETCH,
367 platform_fixed_ioport_init(d);
372 static void platform_reset(DeviceState *dev)
374 PCIXenPlatformState *s = DO_UPCAST(PCIXenPlatformState, pci_dev.qdev, dev);
376 platform_fixed_ioport_reset(s);
379 static void xen_platform_class_init(ObjectClass *klass, void *data)
381 DeviceClass *dc = DEVICE_CLASS(klass);
382 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
384 k->init = xen_platform_initfn;
385 k->vendor_id = PCI_VENDOR_ID_XEN;
386 k->device_id = PCI_DEVICE_ID_XEN_PLATFORM;
387 k->class_id = PCI_CLASS_OTHERS << 8 | 0x80;
388 k->subsystem_vendor_id = PCI_VENDOR_ID_XEN;
389 k->subsystem_id = PCI_DEVICE_ID_XEN_PLATFORM;
391 dc->desc = "XEN platform pci device";
392 dc->reset = platform_reset;
393 dc->vmsd = &vmstate_xen_platform;
396 static TypeInfo xen_platform_info = {
397 .name = "xen-platform",
398 .parent = TYPE_PCI_DEVICE,
399 .instance_size = sizeof(PCIXenPlatformState),
400 .class_init = xen_platform_class_init,
403 static void xen_platform_register_types(void)
405 type_register_static(&xen_platform_info);
408 type_init(xen_platform_register_types)