root / hw / xen_platform.c @ 416343b1
History | View | Annotate | Download (11 kB)
1 |
/*
|
---|---|
2 |
* XEN platform pci device, formerly known as the event channel device
|
3 |
*
|
4 |
* Copyright (c) 2003-2004 Intel Corp.
|
5 |
* Copyright (c) 2006 XenSource
|
6 |
*
|
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:
|
13 |
*
|
14 |
* The above copyright notice and this permission notice shall be included in
|
15 |
* all copies or substantial portions of the Software.
|
16 |
*
|
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
|
23 |
* THE SOFTWARE.
|
24 |
*/
|
25 |
|
26 |
#include <assert.h> |
27 |
|
28 |
#include "hw.h" |
29 |
#include "pc.h" |
30 |
#include "pci.h" |
31 |
#include "irq.h" |
32 |
#include "xen_common.h" |
33 |
#include "net.h" |
34 |
#include "xen_backend.h" |
35 |
#include "trace.h" |
36 |
#include "exec-memory.h" |
37 |
|
38 |
#include <xenguest.h> |
39 |
|
40 |
//#define DEBUG_PLATFORM
|
41 |
|
42 |
#ifdef DEBUG_PLATFORM
|
43 |
#define DPRINTF(fmt, ...) do { \ |
44 |
fprintf(stderr, "xen_platform: " fmt, ## __VA_ARGS__); \ |
45 |
} while (0) |
46 |
#else
|
47 |
#define DPRINTF(fmt, ...) do { } while (0) |
48 |
#endif
|
49 |
|
50 |
#define PFFLAG_ROM_LOCK 1 /* Sets whether ROM memory area is RW or RO */ |
51 |
|
52 |
typedef struct PCIXenPlatformState { |
53 |
PCIDevice pci_dev; |
54 |
MemoryRegion fixed_io; |
55 |
MemoryRegion bar; |
56 |
MemoryRegion mmio_bar; |
57 |
uint8_t flags; /* used only for version_id == 2 */
|
58 |
int drivers_blacklisted;
|
59 |
uint16_t driver_product_version; |
60 |
|
61 |
/* Log from guest drivers */
|
62 |
char log_buffer[4096]; |
63 |
int log_buffer_off;
|
64 |
} PCIXenPlatformState; |
65 |
|
66 |
#define XEN_PLATFORM_IOPORT 0x10 |
67 |
|
68 |
/* Send bytes to syslog */
|
69 |
static void log_writeb(PCIXenPlatformState *s, char val) |
70 |
{ |
71 |
if (val == '\n' || s->log_buffer_off == sizeof(s->log_buffer) - 1) { |
72 |
/* Flush buffer */
|
73 |
s->log_buffer[s->log_buffer_off] = 0;
|
74 |
trace_xen_platform_log(s->log_buffer); |
75 |
s->log_buffer_off = 0;
|
76 |
} else {
|
77 |
s->log_buffer[s->log_buffer_off++] = val; |
78 |
} |
79 |
} |
80 |
|
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 |
85 |
|
86 |
static void unplug_nic(PCIBus *b, PCIDevice *d) |
87 |
{ |
88 |
if (pci_get_word(d->config + PCI_CLASS_DEVICE) ==
|
89 |
PCI_CLASS_NETWORK_ETHERNET) { |
90 |
qdev_unplug(&(d->qdev)); |
91 |
} |
92 |
} |
93 |
|
94 |
static void pci_unplug_nics(PCIBus *bus) |
95 |
{ |
96 |
pci_for_each_device(bus, 0, unplug_nic);
|
97 |
} |
98 |
|
99 |
static void unplug_disks(PCIBus *b, PCIDevice *d) |
100 |
{ |
101 |
if (pci_get_word(d->config + PCI_CLASS_DEVICE) ==
|
102 |
PCI_CLASS_STORAGE_IDE) { |
103 |
qdev_unplug(&(d->qdev)); |
104 |
} |
105 |
} |
106 |
|
107 |
static void pci_unplug_disks(PCIBus *bus) |
108 |
{ |
109 |
pci_for_each_device(bus, 0, unplug_disks);
|
110 |
} |
111 |
|
112 |
static void platform_fixed_ioport_writew(void *opaque, uint32_t addr, uint32_t val) |
113 |
{ |
114 |
PCIXenPlatformState *s = opaque; |
115 |
|
116 |
switch (addr - XEN_PLATFORM_IOPORT) {
|
117 |
case 0: |
118 |
/* Unplug devices. Value is a bitmask of which devices to
|
119 |
unplug, with bit 0 the IDE devices, bit 1 the network
|
120 |
devices, and bit 2 the non-primary-master IDE devices. */
|
121 |
if (val & UNPLUG_ALL_IDE_DISKS) {
|
122 |
DPRINTF("unplug disks\n");
|
123 |
qemu_aio_flush(); |
124 |
bdrv_flush_all(); |
125 |
pci_unplug_disks(s->pci_dev.bus); |
126 |
} |
127 |
if (val & UNPLUG_ALL_NICS) {
|
128 |
DPRINTF("unplug nics\n");
|
129 |
pci_unplug_nics(s->pci_dev.bus); |
130 |
} |
131 |
if (val & UNPLUG_AUX_IDE_DISKS) {
|
132 |
DPRINTF("unplug auxiliary disks not supported\n");
|
133 |
} |
134 |
break;
|
135 |
case 2: |
136 |
switch (val) {
|
137 |
case 1: |
138 |
DPRINTF("Citrix Windows PV drivers loaded in guest\n");
|
139 |
break;
|
140 |
case 0: |
141 |
DPRINTF("Guest claimed to be running PV product 0?\n");
|
142 |
break;
|
143 |
default:
|
144 |
DPRINTF("Unknown PV product %d loaded in guest\n", val);
|
145 |
break;
|
146 |
} |
147 |
s->driver_product_version = val; |
148 |
break;
|
149 |
} |
150 |
} |
151 |
|
152 |
static void platform_fixed_ioport_writel(void *opaque, uint32_t addr, |
153 |
uint32_t val) |
154 |
{ |
155 |
switch (addr - XEN_PLATFORM_IOPORT) {
|
156 |
case 0: |
157 |
/* PV driver version */
|
158 |
break;
|
159 |
} |
160 |
} |
161 |
|
162 |
static void platform_fixed_ioport_writeb(void *opaque, uint32_t addr, uint32_t val) |
163 |
{ |
164 |
PCIXenPlatformState *s = opaque; |
165 |
|
166 |
switch (addr - XEN_PLATFORM_IOPORT) {
|
167 |
case 0: /* Platform flags */ { |
168 |
hvmmem_type_t mem_type = (val & PFFLAG_ROM_LOCK) ? |
169 |
HVMMEM_ram_ro : HVMMEM_ram_rw; |
170 |
if (xc_hvm_set_mem_type(xen_xc, xen_domid, mem_type, 0xc0, 0x40)) { |
171 |
DPRINTF("unable to change ro/rw state of ROM memory area!\n");
|
172 |
} else {
|
173 |
s->flags = val & PFFLAG_ROM_LOCK; |
174 |
DPRINTF("changed ro/rw state of ROM memory area. now is %s state.\n",
|
175 |
(mem_type == HVMMEM_ram_ro ? "ro":"rw")); |
176 |
} |
177 |
break;
|
178 |
} |
179 |
case 2: |
180 |
log_writeb(s, val); |
181 |
break;
|
182 |
} |
183 |
} |
184 |
|
185 |
static uint32_t platform_fixed_ioport_readw(void *opaque, uint32_t addr) |
186 |
{ |
187 |
PCIXenPlatformState *s = opaque; |
188 |
|
189 |
switch (addr - XEN_PLATFORM_IOPORT) {
|
190 |
case 0: |
191 |
if (s->drivers_blacklisted) {
|
192 |
/* The drivers will recognise this magic number and refuse
|
193 |
* to do anything. */
|
194 |
return 0xd249; |
195 |
} else {
|
196 |
/* Magic value so that you can identify the interface. */
|
197 |
return 0x49d2; |
198 |
} |
199 |
default:
|
200 |
return 0xffff; |
201 |
} |
202 |
} |
203 |
|
204 |
static uint32_t platform_fixed_ioport_readb(void *opaque, uint32_t addr) |
205 |
{ |
206 |
PCIXenPlatformState *s = opaque; |
207 |
|
208 |
switch (addr - XEN_PLATFORM_IOPORT) {
|
209 |
case 0: |
210 |
/* Platform flags */
|
211 |
return s->flags;
|
212 |
case 2: |
213 |
/* Version number */
|
214 |
return 1; |
215 |
default:
|
216 |
return 0xff; |
217 |
} |
218 |
} |
219 |
|
220 |
static void platform_fixed_ioport_reset(void *opaque) |
221 |
{ |
222 |
PCIXenPlatformState *s = opaque; |
223 |
|
224 |
platform_fixed_ioport_writeb(s, XEN_PLATFORM_IOPORT, 0);
|
225 |
} |
226 |
|
227 |
const MemoryRegionPortio xen_platform_ioport[] = {
|
228 |
{ 0, 16, 4, .write = platform_fixed_ioport_writel, }, |
229 |
{ 0, 16, 2, .write = platform_fixed_ioport_writew, }, |
230 |
{ 0, 16, 1, .write = platform_fixed_ioport_writeb, }, |
231 |
{ 0, 16, 2, .read = platform_fixed_ioport_readw, }, |
232 |
{ 0, 16, 1, .read = platform_fixed_ioport_readb, }, |
233 |
PORTIO_END_OF_LIST() |
234 |
}; |
235 |
|
236 |
static const MemoryRegionOps platform_fixed_io_ops = { |
237 |
.old_portio = xen_platform_ioport, |
238 |
.endianness = DEVICE_NATIVE_ENDIAN, |
239 |
}; |
240 |
|
241 |
static void platform_fixed_ioport_init(PCIXenPlatformState* s) |
242 |
{ |
243 |
memory_region_init_io(&s->fixed_io, &platform_fixed_io_ops, s, |
244 |
"xen-fixed", 16); |
245 |
memory_region_add_subregion(get_system_io(), XEN_PLATFORM_IOPORT, |
246 |
&s->fixed_io); |
247 |
} |
248 |
|
249 |
/* Xen Platform PCI Device */
|
250 |
|
251 |
static uint32_t xen_platform_ioport_readb(void *opaque, uint32_t addr) |
252 |
{ |
253 |
if (addr == 0) { |
254 |
return platform_fixed_ioport_readb(opaque, XEN_PLATFORM_IOPORT);
|
255 |
} else {
|
256 |
return ~0u; |
257 |
} |
258 |
} |
259 |
|
260 |
static void xen_platform_ioport_writeb(void *opaque, uint32_t addr, uint32_t val) |
261 |
{ |
262 |
PCIXenPlatformState *s = opaque; |
263 |
|
264 |
switch (addr) {
|
265 |
case 0: /* Platform flags */ |
266 |
platform_fixed_ioport_writeb(opaque, XEN_PLATFORM_IOPORT, val); |
267 |
break;
|
268 |
case 8: |
269 |
log_writeb(s, val); |
270 |
break;
|
271 |
default:
|
272 |
break;
|
273 |
} |
274 |
} |
275 |
|
276 |
static MemoryRegionPortio xen_pci_portio[] = {
|
277 |
{ 0, 0x100, 1, .read = xen_platform_ioport_readb, }, |
278 |
{ 0, 0x100, 1, .write = xen_platform_ioport_writeb, }, |
279 |
PORTIO_END_OF_LIST() |
280 |
}; |
281 |
|
282 |
static const MemoryRegionOps xen_pci_io_ops = { |
283 |
.old_portio = xen_pci_portio, |
284 |
}; |
285 |
|
286 |
static void platform_ioport_bar_setup(PCIXenPlatformState *d) |
287 |
{ |
288 |
memory_region_init_io(&d->bar, &xen_pci_io_ops, d, "xen-pci", 0x100); |
289 |
} |
290 |
|
291 |
static uint64_t platform_mmio_read(void *opaque, target_phys_addr_t addr, |
292 |
unsigned size)
|
293 |
{ |
294 |
DPRINTF("Warning: attempted read from physical address "
|
295 |
"0x" TARGET_FMT_plx " in xen platform mmio space\n", addr); |
296 |
|
297 |
return 0; |
298 |
} |
299 |
|
300 |
static void platform_mmio_write(void *opaque, target_phys_addr_t addr, |
301 |
uint64_t val, unsigned size)
|
302 |
{ |
303 |
DPRINTF("Warning: attempted write of 0x%"PRIx64" to physical " |
304 |
"address 0x" TARGET_FMT_plx " in xen platform mmio space\n", |
305 |
val, addr); |
306 |
} |
307 |
|
308 |
static const MemoryRegionOps platform_mmio_handler = { |
309 |
.read = &platform_mmio_read, |
310 |
.write = &platform_mmio_write, |
311 |
.endianness = DEVICE_NATIVE_ENDIAN, |
312 |
}; |
313 |
|
314 |
static void platform_mmio_setup(PCIXenPlatformState *d) |
315 |
{ |
316 |
memory_region_init_io(&d->mmio_bar, &platform_mmio_handler, d, |
317 |
"xen-mmio", 0x1000000); |
318 |
} |
319 |
|
320 |
static int xen_platform_post_load(void *opaque, int version_id) |
321 |
{ |
322 |
PCIXenPlatformState *s = opaque; |
323 |
|
324 |
platform_fixed_ioport_writeb(s, XEN_PLATFORM_IOPORT, s->flags); |
325 |
|
326 |
return 0; |
327 |
} |
328 |
|
329 |
static const VMStateDescription vmstate_xen_platform = { |
330 |
.name = "platform",
|
331 |
.version_id = 4,
|
332 |
.minimum_version_id = 4,
|
333 |
.minimum_version_id_old = 4,
|
334 |
.post_load = xen_platform_post_load, |
335 |
.fields = (VMStateField []) { |
336 |
VMSTATE_PCI_DEVICE(pci_dev, PCIXenPlatformState), |
337 |
VMSTATE_UINT8(flags, PCIXenPlatformState), |
338 |
VMSTATE_END_OF_LIST() |
339 |
} |
340 |
}; |
341 |
|
342 |
static int xen_platform_initfn(PCIDevice *dev) |
343 |
{ |
344 |
PCIXenPlatformState *d = DO_UPCAST(PCIXenPlatformState, pci_dev, dev); |
345 |
uint8_t *pci_conf; |
346 |
|
347 |
pci_conf = d->pci_dev.config; |
348 |
|
349 |
pci_set_word(pci_conf + PCI_COMMAND, PCI_COMMAND_IO | PCI_COMMAND_MEMORY); |
350 |
|
351 |
pci_config_set_prog_interface(pci_conf, 0);
|
352 |
|
353 |
pci_conf[PCI_INTERRUPT_PIN] = 1;
|
354 |
|
355 |
platform_ioport_bar_setup(d); |
356 |
pci_register_bar(&d->pci_dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &d->bar);
|
357 |
|
358 |
/* reserve 16MB mmio address for share memory*/
|
359 |
platform_mmio_setup(d); |
360 |
pci_register_bar(&d->pci_dev, 1, PCI_BASE_ADDRESS_MEM_PREFETCH,
|
361 |
&d->mmio_bar); |
362 |
|
363 |
platform_fixed_ioport_init(d); |
364 |
|
365 |
return 0; |
366 |
} |
367 |
|
368 |
static void platform_reset(DeviceState *dev) |
369 |
{ |
370 |
PCIXenPlatformState *s = DO_UPCAST(PCIXenPlatformState, pci_dev.qdev, dev); |
371 |
|
372 |
platform_fixed_ioport_reset(s); |
373 |
} |
374 |
|
375 |
static PCIDeviceInfo xen_platform_info = {
|
376 |
.init = xen_platform_initfn, |
377 |
.qdev.name = "xen-platform",
|
378 |
.qdev.desc = "XEN platform pci device",
|
379 |
.qdev.size = sizeof(PCIXenPlatformState),
|
380 |
.qdev.vmsd = &vmstate_xen_platform, |
381 |
.qdev.reset = platform_reset, |
382 |
|
383 |
.vendor_id = PCI_VENDOR_ID_XEN, |
384 |
.device_id = PCI_DEVICE_ID_XEN_PLATFORM, |
385 |
.class_id = PCI_CLASS_OTHERS << 8 | 0x80, |
386 |
.subsystem_vendor_id = PCI_VENDOR_ID_XEN, |
387 |
.subsystem_id = PCI_DEVICE_ID_XEN_PLATFORM, |
388 |
.revision = 1,
|
389 |
}; |
390 |
|
391 |
static void xen_platform_register(void) |
392 |
{ |
393 |
pci_qdev_register(&xen_platform_info); |
394 |
} |
395 |
|
396 |
device_init(xen_platform_register); |