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26#include "qemu/osdep.h"
27#include "qapi/error.h"
28#include "hw/hw.h"
29#include "hw/i386/pc.h"
30#include "hw/ide.h"
31#include "hw/pci/pci.h"
32#include "hw/irq.h"
33#include "hw/xen/xen_common.h"
34#include "hw/xen/xen_backend.h"
35#include "trace.h"
36#include "exec/address-spaces.h"
37#include "sysemu/block-backend.h"
38#include "qemu/error-report.h"
39
40#include <xenguest.h>
41
42
43
44#ifdef DEBUG_PLATFORM
45#define DPRINTF(fmt, ...) do { \
46 fprintf(stderr, "xen_platform: " fmt, ## __VA_ARGS__); \
47} while (0)
48#else
49#define DPRINTF(fmt, ...) do { } while (0)
50#endif
51
52#define PFFLAG_ROM_LOCK 1
53
54typedef struct PCIXenPlatformState {
55
56 PCIDevice parent_obj;
57
58
59 MemoryRegion fixed_io;
60 MemoryRegion bar;
61 MemoryRegion mmio_bar;
62 uint8_t flags;
63 int drivers_blacklisted;
64 uint16_t driver_product_version;
65
66
67 char log_buffer[4096];
68 int log_buffer_off;
69} PCIXenPlatformState;
70
71#define TYPE_XEN_PLATFORM "xen-platform"
72#define XEN_PLATFORM(obj) \
73 OBJECT_CHECK(PCIXenPlatformState, (obj), TYPE_XEN_PLATFORM)
74
75#define XEN_PLATFORM_IOPORT 0x10
76
77
78static void log_writeb(PCIXenPlatformState *s, char val)
79{
80 if (val == '\n' || s->log_buffer_off == sizeof(s->log_buffer) - 1) {
81
82 s->log_buffer[s->log_buffer_off] = 0;
83 trace_xen_platform_log(s->log_buffer);
84 s->log_buffer_off = 0;
85 } else {
86 s->log_buffer[s->log_buffer_off++] = val;
87 }
88}
89
90
91#define UNPLUG_ALL_IDE_DISKS 1
92#define UNPLUG_ALL_NICS 2
93#define UNPLUG_AUX_IDE_DISKS 4
94
95static void unplug_nic(PCIBus *b, PCIDevice *d, void *o)
96{
97
98 if (pci_get_word(d->config + PCI_CLASS_DEVICE) ==
99 PCI_CLASS_NETWORK_ETHERNET
100 && strcmp(d->name, "xen-pci-passthrough") != 0) {
101 object_unparent(OBJECT(d));
102 }
103}
104
105static void pci_unplug_nics(PCIBus *bus)
106{
107 pci_for_each_device(bus, 0, unplug_nic, NULL);
108}
109
110static void unplug_disks(PCIBus *b, PCIDevice *d, void *o)
111{
112
113 if (pci_get_word(d->config + PCI_CLASS_DEVICE) ==
114 PCI_CLASS_STORAGE_IDE
115 && strcmp(d->name, "xen-pci-passthrough") != 0) {
116 pci_piix3_xen_ide_unplug(DEVICE(d));
117 }
118}
119
120static void pci_unplug_disks(PCIBus *bus)
121{
122 pci_for_each_device(bus, 0, unplug_disks, NULL);
123}
124
125static void platform_fixed_ioport_writew(void *opaque, uint32_t addr, uint32_t val)
126{
127 PCIXenPlatformState *s = opaque;
128
129 switch (addr) {
130 case 0: {
131 PCIDevice *pci_dev = PCI_DEVICE(s);
132
133
134
135 if (val & UNPLUG_ALL_IDE_DISKS) {
136 DPRINTF("unplug disks\n");
137 blk_drain_all();
138 blk_flush_all();
139 pci_unplug_disks(pci_dev->bus);
140 }
141 if (val & UNPLUG_ALL_NICS) {
142 DPRINTF("unplug nics\n");
143 pci_unplug_nics(pci_dev->bus);
144 }
145 if (val & UNPLUG_AUX_IDE_DISKS) {
146 DPRINTF("unplug auxiliary disks not supported\n");
147 }
148 break;
149 }
150 case 2:
151 switch (val) {
152 case 1:
153 DPRINTF("Citrix Windows PV drivers loaded in guest\n");
154 break;
155 case 0:
156 DPRINTF("Guest claimed to be running PV product 0?\n");
157 break;
158 default:
159 DPRINTF("Unknown PV product %d loaded in guest\n", val);
160 break;
161 }
162 s->driver_product_version = val;
163 break;
164 }
165}
166
167static void platform_fixed_ioport_writel(void *opaque, uint32_t addr,
168 uint32_t val)
169{
170 switch (addr) {
171 case 0:
172
173 break;
174 }
175}
176
177static void platform_fixed_ioport_writeb(void *opaque, uint32_t addr, uint32_t val)
178{
179 PCIXenPlatformState *s = opaque;
180
181 switch (addr) {
182 case 0: {
183 hvmmem_type_t mem_type = (val & PFFLAG_ROM_LOCK) ?
184 HVMMEM_ram_ro : HVMMEM_ram_rw;
185 if (xc_hvm_set_mem_type(xen_xc, xen_domid, mem_type, 0xc0, 0x40)) {
186 DPRINTF("unable to change ro/rw state of ROM memory area!\n");
187 } else {
188 s->flags = val & PFFLAG_ROM_LOCK;
189 DPRINTF("changed ro/rw state of ROM memory area. now is %s state.\n",
190 (mem_type == HVMMEM_ram_ro ? "ro":"rw"));
191 }
192 break;
193 }
194 case 2:
195 log_writeb(s, val);
196 break;
197 }
198}
199
200static uint32_t platform_fixed_ioport_readw(void *opaque, uint32_t addr)
201{
202 PCIXenPlatformState *s = opaque;
203
204 switch (addr) {
205 case 0:
206 if (s->drivers_blacklisted) {
207
208
209 return 0xd249;
210 } else {
211
212 return 0x49d2;
213 }
214 default:
215 return 0xffff;
216 }
217}
218
219static uint32_t platform_fixed_ioport_readb(void *opaque, uint32_t addr)
220{
221 PCIXenPlatformState *s = opaque;
222
223 switch (addr) {
224 case 0:
225
226 return s->flags;
227 case 2:
228
229 return 1;
230 default:
231 return 0xff;
232 }
233}
234
235static void platform_fixed_ioport_reset(void *opaque)
236{
237 PCIXenPlatformState *s = opaque;
238
239 platform_fixed_ioport_writeb(s, 0, 0);
240}
241
242static uint64_t platform_fixed_ioport_read(void *opaque,
243 hwaddr addr,
244 unsigned size)
245{
246 switch (size) {
247 case 1:
248 return platform_fixed_ioport_readb(opaque, addr);
249 case 2:
250 return platform_fixed_ioport_readw(opaque, addr);
251 default:
252 return -1;
253 }
254}
255
256static void platform_fixed_ioport_write(void *opaque, hwaddr addr,
257
258 uint64_t val, unsigned size)
259{
260 switch (size) {
261 case 1:
262 platform_fixed_ioport_writeb(opaque, addr, val);
263 break;
264 case 2:
265 platform_fixed_ioport_writew(opaque, addr, val);
266 break;
267 case 4:
268 platform_fixed_ioport_writel(opaque, addr, val);
269 break;
270 }
271}
272
273
274static const MemoryRegionOps platform_fixed_io_ops = {
275 .read = platform_fixed_ioport_read,
276 .write = platform_fixed_ioport_write,
277 .valid = {
278 .unaligned = true,
279 },
280 .impl = {
281 .min_access_size = 1,
282 .max_access_size = 4,
283 .unaligned = true,
284 },
285 .endianness = DEVICE_LITTLE_ENDIAN,
286};
287
288static void platform_fixed_ioport_init(PCIXenPlatformState* s)
289{
290 memory_region_init_io(&s->fixed_io, OBJECT(s), &platform_fixed_io_ops, s,
291 "xen-fixed", 16);
292 memory_region_add_subregion(get_system_io(), XEN_PLATFORM_IOPORT,
293 &s->fixed_io);
294}
295
296
297
298static uint64_t xen_platform_ioport_readb(void *opaque, hwaddr addr,
299 unsigned int size)
300{
301 if (addr == 0) {
302 return platform_fixed_ioport_readb(opaque, 0);
303 } else {
304 return ~0u;
305 }
306}
307
308static void xen_platform_ioport_writeb(void *opaque, hwaddr addr,
309 uint64_t val, unsigned int size)
310{
311 PCIXenPlatformState *s = opaque;
312
313 switch (addr) {
314 case 0:
315 platform_fixed_ioport_writeb(opaque, 0, (uint32_t)val);
316 break;
317 case 8:
318 log_writeb(s, (uint32_t)val);
319 break;
320 default:
321 break;
322 }
323}
324
325static const MemoryRegionOps xen_pci_io_ops = {
326 .read = xen_platform_ioport_readb,
327 .write = xen_platform_ioport_writeb,
328 .impl.min_access_size = 1,
329 .impl.max_access_size = 1,
330};
331
332static void platform_ioport_bar_setup(PCIXenPlatformState *d)
333{
334 memory_region_init_io(&d->bar, OBJECT(d), &xen_pci_io_ops, d,
335 "xen-pci", 0x100);
336}
337
338static uint64_t platform_mmio_read(void *opaque, hwaddr addr,
339 unsigned size)
340{
341 DPRINTF("Warning: attempted read from physical address "
342 "0x" TARGET_FMT_plx " in xen platform mmio space\n", addr);
343
344 return 0;
345}
346
347static void platform_mmio_write(void *opaque, hwaddr addr,
348 uint64_t val, unsigned size)
349{
350 DPRINTF("Warning: attempted write of 0x%"PRIx64" to physical "
351 "address 0x" TARGET_FMT_plx " in xen platform mmio space\n",
352 val, addr);
353}
354
355static const MemoryRegionOps platform_mmio_handler = {
356 .read = &platform_mmio_read,
357 .write = &platform_mmio_write,
358 .endianness = DEVICE_NATIVE_ENDIAN,
359};
360
361static void platform_mmio_setup(PCIXenPlatformState *d)
362{
363 memory_region_init_io(&d->mmio_bar, OBJECT(d), &platform_mmio_handler, d,
364 "xen-mmio", 0x1000000);
365}
366
367static int xen_platform_post_load(void *opaque, int version_id)
368{
369 PCIXenPlatformState *s = opaque;
370
371 platform_fixed_ioport_writeb(s, 0, s->flags);
372
373 return 0;
374}
375
376static const VMStateDescription vmstate_xen_platform = {
377 .name = "platform",
378 .version_id = 4,
379 .minimum_version_id = 4,
380 .post_load = xen_platform_post_load,
381 .fields = (VMStateField[]) {
382 VMSTATE_PCI_DEVICE(parent_obj, PCIXenPlatformState),
383 VMSTATE_UINT8(flags, PCIXenPlatformState),
384 VMSTATE_END_OF_LIST()
385 }
386};
387
388static void xen_platform_realize(PCIDevice *dev, Error **errp)
389{
390 PCIXenPlatformState *d = XEN_PLATFORM(dev);
391 uint8_t *pci_conf;
392
393
394 if (!xen_enabled()) {
395 error_setg(errp, "xen-platform device requires the Xen accelerator");
396 return;
397 }
398
399 pci_conf = dev->config;
400
401 pci_set_word(pci_conf + PCI_COMMAND, PCI_COMMAND_IO | PCI_COMMAND_MEMORY);
402
403 pci_config_set_prog_interface(pci_conf, 0);
404
405 pci_conf[PCI_INTERRUPT_PIN] = 1;
406
407 platform_ioport_bar_setup(d);
408 pci_register_bar(dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &d->bar);
409
410
411 platform_mmio_setup(d);
412 pci_register_bar(dev, 1, PCI_BASE_ADDRESS_MEM_PREFETCH,
413 &d->mmio_bar);
414
415 platform_fixed_ioport_init(d);
416}
417
418static void platform_reset(DeviceState *dev)
419{
420 PCIXenPlatformState *s = XEN_PLATFORM(dev);
421
422 platform_fixed_ioport_reset(s);
423}
424
425static void xen_platform_class_init(ObjectClass *klass, void *data)
426{
427 DeviceClass *dc = DEVICE_CLASS(klass);
428 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
429
430 k->realize = xen_platform_realize;
431 k->vendor_id = PCI_VENDOR_ID_XEN;
432 k->device_id = PCI_DEVICE_ID_XEN_PLATFORM;
433 k->class_id = PCI_CLASS_OTHERS << 8 | 0x80;
434 k->subsystem_vendor_id = PCI_VENDOR_ID_XEN;
435 k->subsystem_id = PCI_DEVICE_ID_XEN_PLATFORM;
436 k->revision = 1;
437 set_bit(DEVICE_CATEGORY_MISC, dc->categories);
438 dc->desc = "XEN platform pci device";
439 dc->reset = platform_reset;
440 dc->vmsd = &vmstate_xen_platform;
441}
442
443static const TypeInfo xen_platform_info = {
444 .name = TYPE_XEN_PLATFORM,
445 .parent = TYPE_PCI_DEVICE,
446 .instance_size = sizeof(PCIXenPlatformState),
447 .class_init = xen_platform_class_init,
448};
449
450static void xen_platform_register_types(void)
451{
452 type_register_static(&xen_platform_info);
453}
454
455type_init(xen_platform_register_types)
456
