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3285cf4f
AP
1/*
2 * Copyright (C) 2010 Citrix Ltd.
3 *
4 * This work is licensed under the terms of the GNU GPL, version 2. See
5 * the COPYING file in the top-level directory.
6 *
6b620ca3
PB
7 * Contributions after 2012-01-13 are licensed under the terms of the
8 * GNU GPL, version 2 or (at your option) any later version.
3285cf4f
AP
9 */
10
9ce94e7c
AS
11#include <sys/mman.h>
12
a2cb15b0 13#include "hw/pci/pci.h"
c9622478 14#include "hw/pc.h"
3285cf4f
AP
15#include "hw/xen_common.h"
16#include "hw/xen_backend.h"
39f42439 17#include "qmp-commands.h"
3285cf4f 18
4ad549e8 19#include "char/char.h"
1de7afc9 20#include "qemu/range.h"
9c17d615 21#include "sysemu/xen-mapcache.h"
432d268c 22#include "trace.h"
022c62cb 23#include "exec/address-spaces.h"
432d268c 24
9ce94e7c
AS
25#include <xen/hvm/ioreq.h>
26#include <xen/hvm/params.h>
8a369e20 27#include <xen/hvm/e820.h>
9ce94e7c
AS
28
29//#define DEBUG_XEN
30
31#ifdef DEBUG_XEN
32#define DPRINTF(fmt, ...) \
33 do { fprintf(stderr, "xen: " fmt, ## __VA_ARGS__); } while (0)
34#else
35#define DPRINTF(fmt, ...) \
36 do { } while (0)
37#endif
38
ce76b8a8 39static MemoryRegion ram_memory, ram_640k, ram_lo, ram_hi;
c65adf9b 40static MemoryRegion *framebuffer;
39f42439 41static bool xen_in_migration;
ce76b8a8 42
9ce94e7c
AS
43/* Compatibility with older version */
44#if __XEN_LATEST_INTERFACE_VERSION__ < 0x0003020a
45static inline uint32_t xen_vcpu_eport(shared_iopage_t *shared_page, int i)
46{
47 return shared_page->vcpu_iodata[i].vp_eport;
48}
49static inline ioreq_t *xen_vcpu_ioreq(shared_iopage_t *shared_page, int vcpu)
50{
51 return &shared_page->vcpu_iodata[vcpu].vp_ioreq;
52}
53# define FMT_ioreq_size PRIx64
54#else
55static inline uint32_t xen_vcpu_eport(shared_iopage_t *shared_page, int i)
56{
57 return shared_page->vcpu_ioreq[i].vp_eport;
58}
59static inline ioreq_t *xen_vcpu_ioreq(shared_iopage_t *shared_page, int vcpu)
60{
61 return &shared_page->vcpu_ioreq[vcpu];
62}
63# define FMT_ioreq_size "u"
64#endif
fda1f768
SS
65#ifndef HVM_PARAM_BUFIOREQ_EVTCHN
66#define HVM_PARAM_BUFIOREQ_EVTCHN 26
67#endif
9ce94e7c
AS
68
69#define BUFFER_IO_MAX_DELAY 100
70
b4dd7802 71typedef struct XenPhysmap {
a8170e5e 72 hwaddr start_addr;
b4dd7802 73 ram_addr_t size;
d1814e08 74 char *name;
a8170e5e 75 hwaddr phys_offset;
b4dd7802
AP
76
77 QLIST_ENTRY(XenPhysmap) list;
78} XenPhysmap;
79
9ce94e7c
AS
80typedef struct XenIOState {
81 shared_iopage_t *shared_page;
82 buffered_iopage_t *buffered_io_page;
83 QEMUTimer *buffered_io_timer;
84 /* the evtchn port for polling the notification, */
85 evtchn_port_t *ioreq_local_port;
fda1f768
SS
86 /* evtchn local port for buffered io */
87 evtchn_port_t bufioreq_local_port;
9ce94e7c
AS
88 /* the evtchn fd for polling */
89 XenEvtchn xce_handle;
90 /* which vcpu we are serving */
91 int send_vcpu;
92
29321335 93 struct xs_handle *xenstore;
20581d20 94 MemoryListener memory_listener;
b4dd7802 95 QLIST_HEAD(, XenPhysmap) physmap;
a8170e5e 96 hwaddr free_phys_offset;
b4dd7802 97 const XenPhysmap *log_for_dirtybit;
29321335 98
9ce94e7c 99 Notifier exit;
da98c8eb 100 Notifier suspend;
9ce94e7c
AS
101} XenIOState;
102
41445300
AP
103/* Xen specific function for piix pci */
104
105int xen_pci_slot_get_pirq(PCIDevice *pci_dev, int irq_num)
106{
107 return irq_num + ((pci_dev->devfn >> 3) << 2);
108}
109
110void xen_piix3_set_irq(void *opaque, int irq_num, int level)
111{
112 xc_hvm_set_pci_intx_level(xen_xc, xen_domid, 0, 0, irq_num >> 2,
113 irq_num & 3, level);
114}
115
116void xen_piix_pci_write_config_client(uint32_t address, uint32_t val, int len)
117{
118 int i;
119
120 /* Scan for updates to PCI link routes (0x60-0x63). */
121 for (i = 0; i < len; i++) {
122 uint8_t v = (val >> (8 * i)) & 0xff;
123 if (v & 0x80) {
124 v = 0;
125 }
126 v &= 0xf;
127 if (((address + i) >= 0x60) && ((address + i) <= 0x63)) {
128 xc_hvm_set_pci_link_route(xen_xc, xen_domid, address + i - 0x60, v);
129 }
130 }
131}
132
f1dbf015
WL
133void xen_hvm_inject_msi(uint64_t addr, uint32_t data)
134{
4c9f8d1b 135 xen_xc_hvm_inject_msi(xen_xc, xen_domid, addr, data);
f1dbf015
WL
136}
137
da98c8eb 138static void xen_suspend_notifier(Notifier *notifier, void *data)
c9622478 139{
da98c8eb 140 xc_set_hvm_param(xen_xc, xen_domid, HVM_PARAM_ACPI_S_STATE, 3);
c9622478
AP
141}
142
9c11a8ac
AP
143/* Xen Interrupt Controller */
144
145static void xen_set_irq(void *opaque, int irq, int level)
146{
147 xc_hvm_set_isa_irq_level(xen_xc, xen_domid, irq, level);
148}
149
150qemu_irq *xen_interrupt_controller_init(void)
151{
152 return qemu_allocate_irqs(xen_set_irq, NULL, 16);
153}
154
432d268c
JN
155/* Memory Ops */
156
157static void xen_ram_init(ram_addr_t ram_size)
158{
ce76b8a8 159 MemoryRegion *sysmem = get_system_memory();
432d268c 160 ram_addr_t below_4g_mem_size, above_4g_mem_size = 0;
ce76b8a8 161 ram_addr_t block_len;
432d268c 162
ce76b8a8 163 block_len = ram_size;
8a369e20
AP
164 if (ram_size >= HVM_BELOW_4G_RAM_END) {
165 /* Xen does not allocate the memory continuously, and keep a hole at
166 * HVM_BELOW_4G_MMIO_START of HVM_BELOW_4G_MMIO_LENGTH
167 */
ce76b8a8 168 block_len += HVM_BELOW_4G_MMIO_LENGTH;
8a369e20 169 }
c5705a77
AK
170 memory_region_init_ram(&ram_memory, "xen.ram", block_len);
171 vmstate_register_ram_global(&ram_memory);
432d268c 172
8a369e20
AP
173 if (ram_size >= HVM_BELOW_4G_RAM_END) {
174 above_4g_mem_size = ram_size - HVM_BELOW_4G_RAM_END;
175 below_4g_mem_size = HVM_BELOW_4G_RAM_END;
432d268c
JN
176 } else {
177 below_4g_mem_size = ram_size;
178 }
179
ce76b8a8
AK
180 memory_region_init_alias(&ram_640k, "xen.ram.640k",
181 &ram_memory, 0, 0xa0000);
182 memory_region_add_subregion(sysmem, 0, &ram_640k);
8a369e20
AP
183 /* Skip of the VGA IO memory space, it will be registered later by the VGA
184 * emulated device.
185 *
186 * The area between 0xc0000 and 0x100000 will be used by SeaBIOS to load
187 * the Options ROM, so it is registered here as RAM.
188 */
ce76b8a8
AK
189 memory_region_init_alias(&ram_lo, "xen.ram.lo",
190 &ram_memory, 0xc0000, below_4g_mem_size - 0xc0000);
191 memory_region_add_subregion(sysmem, 0xc0000, &ram_lo);
432d268c 192 if (above_4g_mem_size > 0) {
ce76b8a8
AK
193 memory_region_init_alias(&ram_hi, "xen.ram.hi",
194 &ram_memory, 0x100000000ULL,
195 above_4g_mem_size);
196 memory_region_add_subregion(sysmem, 0x100000000ULL, &ram_hi);
432d268c 197 }
432d268c
JN
198}
199
fce537d4 200void xen_ram_alloc(ram_addr_t ram_addr, ram_addr_t size, MemoryRegion *mr)
432d268c
JN
201{
202 unsigned long nr_pfn;
203 xen_pfn_t *pfn_list;
204 int i;
205
c234572d
AP
206 if (runstate_check(RUN_STATE_INMIGRATE)) {
207 /* RAM already populated in Xen */
208 fprintf(stderr, "%s: do not alloc "RAM_ADDR_FMT
209 " bytes of ram at "RAM_ADDR_FMT" when runstate is INMIGRATE\n",
210 __func__, size, ram_addr);
211 return;
212 }
213
ce76b8a8
AK
214 if (mr == &ram_memory) {
215 return;
216 }
217
432d268c
JN
218 trace_xen_ram_alloc(ram_addr, size);
219
220 nr_pfn = size >> TARGET_PAGE_BITS;
7267c094 221 pfn_list = g_malloc(sizeof (*pfn_list) * nr_pfn);
432d268c
JN
222
223 for (i = 0; i < nr_pfn; i++) {
224 pfn_list[i] = (ram_addr >> TARGET_PAGE_BITS) + i;
225 }
226
227 if (xc_domain_populate_physmap_exact(xen_xc, xen_domid, nr_pfn, 0, 0, pfn_list)) {
f15fbc4b 228 hw_error("xen: failed to populate ram at " RAM_ADDR_FMT, ram_addr);
432d268c
JN
229 }
230
7267c094 231 g_free(pfn_list);
432d268c
JN
232}
233
b4dd7802 234static XenPhysmap *get_physmapping(XenIOState *state,
a8170e5e 235 hwaddr start_addr, ram_addr_t size)
b4dd7802
AP
236{
237 XenPhysmap *physmap = NULL;
238
239 start_addr &= TARGET_PAGE_MASK;
240
241 QLIST_FOREACH(physmap, &state->physmap, list) {
242 if (range_covers_byte(physmap->start_addr, physmap->size, start_addr)) {
243 return physmap;
244 }
245 }
246 return NULL;
247}
248
a8170e5e 249static hwaddr xen_phys_offset_to_gaddr(hwaddr start_addr,
cd1ba7de
AP
250 ram_addr_t size, void *opaque)
251{
a8170e5e 252 hwaddr addr = start_addr & TARGET_PAGE_MASK;
cd1ba7de
AP
253 XenIOState *xen_io_state = opaque;
254 XenPhysmap *physmap = NULL;
255
256 QLIST_FOREACH(physmap, &xen_io_state->physmap, list) {
257 if (range_covers_byte(physmap->phys_offset, physmap->size, addr)) {
258 return physmap->start_addr;
259 }
260 }
261
262 return start_addr;
263}
264
b4dd7802
AP
265#if CONFIG_XEN_CTRL_INTERFACE_VERSION >= 340
266static int xen_add_to_physmap(XenIOState *state,
a8170e5e 267 hwaddr start_addr,
b4dd7802 268 ram_addr_t size,
20581d20 269 MemoryRegion *mr,
a8170e5e 270 hwaddr offset_within_region)
b4dd7802
AP
271{
272 unsigned long i = 0;
273 int rc = 0;
274 XenPhysmap *physmap = NULL;
a8170e5e
AK
275 hwaddr pfn, start_gpfn;
276 hwaddr phys_offset = memory_region_get_ram_addr(mr);
d1814e08 277 char path[80], value[17];
b4dd7802
AP
278
279 if (get_physmapping(state, start_addr, size)) {
280 return 0;
281 }
282 if (size <= 0) {
283 return -1;
284 }
285
ebed8505
SS
286 /* Xen can only handle a single dirty log region for now and we want
287 * the linear framebuffer to be that region.
288 * Avoid tracking any regions that is not videoram and avoid tracking
289 * the legacy vga region. */
20581d20
AK
290 if (mr == framebuffer && start_addr > 0xbffff) {
291 goto go_physmap;
ebed8505
SS
292 }
293 return -1;
294
295go_physmap:
f1b8caf1
SE
296 DPRINTF("mapping vram to %"HWADDR_PRIx" - %"HWADDR_PRIx"\n",
297 start_addr, start_addr + size);
b4dd7802
AP
298
299 pfn = phys_offset >> TARGET_PAGE_BITS;
300 start_gpfn = start_addr >> TARGET_PAGE_BITS;
301 for (i = 0; i < size >> TARGET_PAGE_BITS; i++) {
302 unsigned long idx = pfn + i;
303 xen_pfn_t gpfn = start_gpfn + i;
304
305 rc = xc_domain_add_to_physmap(xen_xc, xen_domid, XENMAPSPACE_gmfn, idx, gpfn);
306 if (rc) {
307 DPRINTF("add_to_physmap MFN %"PRI_xen_pfn" to PFN %"
308 PRI_xen_pfn" failed: %d\n", idx, gpfn, rc);
309 return -rc;
310 }
311 }
312
7267c094 313 physmap = g_malloc(sizeof (XenPhysmap));
b4dd7802
AP
314
315 physmap->start_addr = start_addr;
316 physmap->size = size;
d1814e08 317 physmap->name = (char *)mr->name;
b4dd7802
AP
318 physmap->phys_offset = phys_offset;
319
320 QLIST_INSERT_HEAD(&state->physmap, physmap, list);
321
322 xc_domain_pin_memory_cacheattr(xen_xc, xen_domid,
323 start_addr >> TARGET_PAGE_BITS,
324 (start_addr + size) >> TARGET_PAGE_BITS,
325 XEN_DOMCTL_MEM_CACHEATTR_WB);
d1814e08
SS
326
327 snprintf(path, sizeof(path),
328 "/local/domain/0/device-model/%d/physmap/%"PRIx64"/start_addr",
329 xen_domid, (uint64_t)phys_offset);
330 snprintf(value, sizeof(value), "%"PRIx64, (uint64_t)start_addr);
331 if (!xs_write(state->xenstore, 0, path, value, strlen(value))) {
332 return -1;
333 }
334 snprintf(path, sizeof(path),
335 "/local/domain/0/device-model/%d/physmap/%"PRIx64"/size",
336 xen_domid, (uint64_t)phys_offset);
337 snprintf(value, sizeof(value), "%"PRIx64, (uint64_t)size);
338 if (!xs_write(state->xenstore, 0, path, value, strlen(value))) {
339 return -1;
340 }
341 if (mr->name) {
342 snprintf(path, sizeof(path),
343 "/local/domain/0/device-model/%d/physmap/%"PRIx64"/name",
344 xen_domid, (uint64_t)phys_offset);
345 if (!xs_write(state->xenstore, 0, path, mr->name, strlen(mr->name))) {
346 return -1;
347 }
348 }
349
b4dd7802
AP
350 return 0;
351}
352
353static int xen_remove_from_physmap(XenIOState *state,
a8170e5e 354 hwaddr start_addr,
b4dd7802
AP
355 ram_addr_t size)
356{
357 unsigned long i = 0;
358 int rc = 0;
359 XenPhysmap *physmap = NULL;
a8170e5e 360 hwaddr phys_offset = 0;
b4dd7802
AP
361
362 physmap = get_physmapping(state, start_addr, size);
363 if (physmap == NULL) {
364 return -1;
365 }
366
367 phys_offset = physmap->phys_offset;
368 size = physmap->size;
369
f1b8caf1
SE
370 DPRINTF("unmapping vram to %"HWADDR_PRIx" - %"HWADDR_PRIx", from ",
371 "%"HWADDR_PRIx"\n", phys_offset, phys_offset + size, start_addr);
b4dd7802
AP
372
373 size >>= TARGET_PAGE_BITS;
374 start_addr >>= TARGET_PAGE_BITS;
375 phys_offset >>= TARGET_PAGE_BITS;
376 for (i = 0; i < size; i++) {
377 unsigned long idx = start_addr + i;
378 xen_pfn_t gpfn = phys_offset + i;
379
380 rc = xc_domain_add_to_physmap(xen_xc, xen_domid, XENMAPSPACE_gmfn, idx, gpfn);
381 if (rc) {
382 fprintf(stderr, "add_to_physmap MFN %"PRI_xen_pfn" to PFN %"
383 PRI_xen_pfn" failed: %d\n", idx, gpfn, rc);
384 return -rc;
385 }
386 }
387
388 QLIST_REMOVE(physmap, list);
389 if (state->log_for_dirtybit == physmap) {
390 state->log_for_dirtybit = NULL;
391 }
392 free(physmap);
393
394 return 0;
395}
396
397#else
398static int xen_add_to_physmap(XenIOState *state,
a8170e5e 399 hwaddr start_addr,
b4dd7802 400 ram_addr_t size,
20581d20 401 MemoryRegion *mr,
a8170e5e 402 hwaddr offset_within_region)
b4dd7802
AP
403{
404 return -ENOSYS;
405}
406
407static int xen_remove_from_physmap(XenIOState *state,
a8170e5e 408 hwaddr start_addr,
b4dd7802
AP
409 ram_addr_t size)
410{
411 return -ENOSYS;
412}
413#endif
414
20581d20
AK
415static void xen_set_memory(struct MemoryListener *listener,
416 MemoryRegionSection *section,
417 bool add)
b4dd7802 418{
20581d20 419 XenIOState *state = container_of(listener, XenIOState, memory_listener);
a8170e5e 420 hwaddr start_addr = section->offset_within_address_space;
20581d20
AK
421 ram_addr_t size = section->size;
422 bool log_dirty = memory_region_is_logging(section->mr);
b4dd7802
AP
423 hvmmem_type_t mem_type;
424
20581d20 425 if (!memory_region_is_ram(section->mr)) {
b4dd7802
AP
426 return;
427 }
428
20581d20
AK
429 if (!(section->mr != &ram_memory
430 && ( (log_dirty && add) || (!log_dirty && !add)))) {
431 return;
432 }
433
434 trace_xen_client_set_memory(start_addr, size, log_dirty);
b4dd7802
AP
435
436 start_addr &= TARGET_PAGE_MASK;
437 size = TARGET_PAGE_ALIGN(size);
20581d20
AK
438
439 if (add) {
440 if (!memory_region_is_rom(section->mr)) {
441 xen_add_to_physmap(state, start_addr, size,
442 section->mr, section->offset_within_region);
443 } else {
444 mem_type = HVMMEM_ram_ro;
445 if (xc_hvm_set_mem_type(xen_xc, xen_domid, mem_type,
446 start_addr >> TARGET_PAGE_BITS,
447 size >> TARGET_PAGE_BITS)) {
448 DPRINTF("xc_hvm_set_mem_type error, addr: "TARGET_FMT_plx"\n",
449 start_addr);
450 }
b4dd7802 451 }
20581d20 452 } else {
b4dd7802
AP
453 if (xen_remove_from_physmap(state, start_addr, size) < 0) {
454 DPRINTF("physmapping does not exist at "TARGET_FMT_plx"\n", start_addr);
455 }
b4dd7802
AP
456 }
457}
458
20581d20
AK
459static void xen_region_add(MemoryListener *listener,
460 MemoryRegionSection *section)
461{
462 xen_set_memory(listener, section, true);
463}
464
465static void xen_region_del(MemoryListener *listener,
466 MemoryRegionSection *section)
467{
468 xen_set_memory(listener, section, false);
469}
470
b18620cf 471static void xen_sync_dirty_bitmap(XenIOState *state,
a8170e5e 472 hwaddr start_addr,
b18620cf 473 ram_addr_t size)
b4dd7802 474{
a8170e5e 475 hwaddr npages = size >> TARGET_PAGE_BITS;
b4dd7802
AP
476 const int width = sizeof(unsigned long) * 8;
477 unsigned long bitmap[(npages + width - 1) / width];
478 int rc, i, j;
479 const XenPhysmap *physmap = NULL;
480
481 physmap = get_physmapping(state, start_addr, size);
482 if (physmap == NULL) {
483 /* not handled */
b18620cf 484 return;
b4dd7802
AP
485 }
486
487 if (state->log_for_dirtybit == NULL) {
488 state->log_for_dirtybit = physmap;
489 } else if (state->log_for_dirtybit != physmap) {
b18620cf
AP
490 /* Only one range for dirty bitmap can be tracked. */
491 return;
b4dd7802 492 }
b4dd7802
AP
493
494 rc = xc_hvm_track_dirty_vram(xen_xc, xen_domid,
495 start_addr >> TARGET_PAGE_BITS, npages,
496 bitmap);
b18620cf
AP
497 if (rc < 0) {
498 if (rc != -ENODATA) {
8aba7dc0
AP
499 memory_region_set_dirty(framebuffer, 0, size);
500 DPRINTF("xen: track_dirty_vram failed (0x" TARGET_FMT_plx
b18620cf
AP
501 ", 0x" TARGET_FMT_plx "): %s\n",
502 start_addr, start_addr + size, strerror(-rc));
503 }
504 return;
b4dd7802
AP
505 }
506
507 for (i = 0; i < ARRAY_SIZE(bitmap); i++) {
508 unsigned long map = bitmap[i];
509 while (map != 0) {
510 j = ffsl(map) - 1;
511 map &= ~(1ul << j);
5a97065b 512 memory_region_set_dirty(framebuffer,
fd4aa979
BS
513 (i * width + j) * TARGET_PAGE_SIZE,
514 TARGET_PAGE_SIZE);
b4dd7802
AP
515 };
516 }
b4dd7802
AP
517}
518
20581d20
AK
519static void xen_log_start(MemoryListener *listener,
520 MemoryRegionSection *section)
b4dd7802 521{
20581d20 522 XenIOState *state = container_of(listener, XenIOState, memory_listener);
b4dd7802 523
b18620cf
AP
524 xen_sync_dirty_bitmap(state, section->offset_within_address_space,
525 section->size);
b4dd7802
AP
526}
527
20581d20 528static void xen_log_stop(MemoryListener *listener, MemoryRegionSection *section)
b4dd7802 529{
20581d20 530 XenIOState *state = container_of(listener, XenIOState, memory_listener);
b4dd7802
AP
531
532 state->log_for_dirtybit = NULL;
533 /* Disable dirty bit tracking */
b18620cf 534 xc_hvm_track_dirty_vram(xen_xc, xen_domid, 0, 0, NULL);
b4dd7802
AP
535}
536
20581d20 537static void xen_log_sync(MemoryListener *listener, MemoryRegionSection *section)
b4dd7802 538{
20581d20 539 XenIOState *state = container_of(listener, XenIOState, memory_listener);
b4dd7802 540
b18620cf
AP
541 xen_sync_dirty_bitmap(state, section->offset_within_address_space,
542 section->size);
b4dd7802
AP
543}
544
20581d20
AK
545static void xen_log_global_start(MemoryListener *listener)
546{
39f42439
AP
547 if (xen_enabled()) {
548 xen_in_migration = true;
549 }
20581d20
AK
550}
551
552static void xen_log_global_stop(MemoryListener *listener)
b4dd7802 553{
39f42439 554 xen_in_migration = false;
b4dd7802
AP
555}
556
20581d20
AK
557static MemoryListener xen_memory_listener = {
558 .region_add = xen_region_add,
559 .region_del = xen_region_del,
b4dd7802
AP
560 .log_start = xen_log_start,
561 .log_stop = xen_log_stop,
20581d20
AK
562 .log_sync = xen_log_sync,
563 .log_global_start = xen_log_global_start,
564 .log_global_stop = xen_log_global_stop,
72e22d2f 565 .priority = 10,
b4dd7802 566};
432d268c 567
39f42439
AP
568void qmp_xen_set_global_dirty_log(bool enable, Error **errp)
569{
570 if (enable) {
571 memory_global_dirty_log_start();
572 } else {
573 memory_global_dirty_log_stop();
574 }
575}
576
29d3ccde
AP
577/* VCPU Operations, MMIO, IO ring ... */
578
579static void xen_reset_vcpu(void *opaque)
580{
9349b4f9 581 CPUArchState *env = opaque;
29d3ccde
AP
582
583 env->halted = 1;
584}
585
586void xen_vcpu_init(void)
587{
4a1e40b5 588 if (first_cpu != NULL) {
29d3ccde
AP
589 qemu_register_reset(xen_reset_vcpu, first_cpu);
590 xen_reset_vcpu(first_cpu);
591 }
95d5d75e
SS
592 /* if rtc_clock is left to default (host_clock), disable it */
593 if (rtc_clock == host_clock) {
594 qemu_clock_enable(rtc_clock, false);
595 }
29d3ccde
AP
596}
597
9ce94e7c
AS
598/* get the ioreq packets from share mem */
599static ioreq_t *cpu_get_ioreq_from_shared_memory(XenIOState *state, int vcpu)
600{
601 ioreq_t *req = xen_vcpu_ioreq(state->shared_page, vcpu);
602
603 if (req->state != STATE_IOREQ_READY) {
604 DPRINTF("I/O request not ready: "
605 "%x, ptr: %x, port: %"PRIx64", "
606 "data: %"PRIx64", count: %" FMT_ioreq_size ", size: %" FMT_ioreq_size "\n",
607 req->state, req->data_is_ptr, req->addr,
608 req->data, req->count, req->size);
609 return NULL;
610 }
611
612 xen_rmb(); /* see IOREQ_READY /then/ read contents of ioreq */
613
614 req->state = STATE_IOREQ_INPROCESS;
615 return req;
616}
617
618/* use poll to get the port notification */
619/* ioreq_vec--out,the */
620/* retval--the number of ioreq packet */
621static ioreq_t *cpu_get_ioreq(XenIOState *state)
622{
623 int i;
624 evtchn_port_t port;
625
626 port = xc_evtchn_pending(state->xce_handle);
fda1f768
SS
627 if (port == state->bufioreq_local_port) {
628 qemu_mod_timer(state->buffered_io_timer,
629 BUFFER_IO_MAX_DELAY + qemu_get_clock_ms(rt_clock));
630 return NULL;
631 }
632
9ce94e7c
AS
633 if (port != -1) {
634 for (i = 0; i < smp_cpus; i++) {
635 if (state->ioreq_local_port[i] == port) {
636 break;
637 }
638 }
639
640 if (i == smp_cpus) {
641 hw_error("Fatal error while trying to get io event!\n");
642 }
643
644 /* unmask the wanted port again */
645 xc_evtchn_unmask(state->xce_handle, port);
646
647 /* get the io packet from shared memory */
648 state->send_vcpu = i;
649 return cpu_get_ioreq_from_shared_memory(state, i);
650 }
651
652 /* read error or read nothing */
653 return NULL;
654}
655
656static uint32_t do_inp(pio_addr_t addr, unsigned long size)
657{
658 switch (size) {
659 case 1:
660 return cpu_inb(addr);
661 case 2:
662 return cpu_inw(addr);
663 case 4:
664 return cpu_inl(addr);
665 default:
666 hw_error("inp: bad size: %04"FMT_pioaddr" %lx", addr, size);
667 }
668}
669
670static void do_outp(pio_addr_t addr,
671 unsigned long size, uint32_t val)
672{
673 switch (size) {
674 case 1:
675 return cpu_outb(addr, val);
676 case 2:
677 return cpu_outw(addr, val);
678 case 4:
679 return cpu_outl(addr, val);
680 default:
681 hw_error("outp: bad size: %04"FMT_pioaddr" %lx", addr, size);
682 }
683}
684
a3864829
IJ
685/*
686 * Helper functions which read/write an object from/to physical guest
687 * memory, as part of the implementation of an ioreq.
688 *
689 * Equivalent to
690 * cpu_physical_memory_rw(addr + (req->df ? -1 : +1) * req->size * i,
691 * val, req->size, 0/1)
692 * except without the integer overflow problems.
693 */
694static void rw_phys_req_item(hwaddr addr,
695 ioreq_t *req, uint32_t i, void *val, int rw)
696{
697 /* Do everything unsigned so overflow just results in a truncated result
698 * and accesses to undesired parts of guest memory, which is up
699 * to the guest */
700 hwaddr offset = (hwaddr)req->size * i;
701 if (req->df) {
702 addr -= offset;
703 } else {
704 addr += offset;
705 }
706 cpu_physical_memory_rw(addr, val, req->size, rw);
707}
708
709static inline void read_phys_req_item(hwaddr addr,
710 ioreq_t *req, uint32_t i, void *val)
9ce94e7c 711{
a3864829
IJ
712 rw_phys_req_item(addr, req, i, val, 0);
713}
714static inline void write_phys_req_item(hwaddr addr,
715 ioreq_t *req, uint32_t i, void *val)
716{
717 rw_phys_req_item(addr, req, i, val, 1);
718}
9ce94e7c 719
a3864829
IJ
720
721static void cpu_ioreq_pio(ioreq_t *req)
722{
249e7e0f 723 uint32_t i;
9ce94e7c
AS
724
725 if (req->dir == IOREQ_READ) {
726 if (!req->data_is_ptr) {
727 req->data = do_inp(req->addr, req->size);
728 } else {
729 uint32_t tmp;
730
731 for (i = 0; i < req->count; i++) {
732 tmp = do_inp(req->addr, req->size);
a3864829 733 write_phys_req_item(req->data, req, i, &tmp);
9ce94e7c
AS
734 }
735 }
736 } else if (req->dir == IOREQ_WRITE) {
737 if (!req->data_is_ptr) {
738 do_outp(req->addr, req->size, req->data);
739 } else {
740 for (i = 0; i < req->count; i++) {
741 uint32_t tmp = 0;
742
a3864829 743 read_phys_req_item(req->data, req, i, &tmp);
9ce94e7c
AS
744 do_outp(req->addr, req->size, tmp);
745 }
746 }
747 }
748}
749
750static void cpu_ioreq_move(ioreq_t *req)
751{
249e7e0f 752 uint32_t i;
9ce94e7c
AS
753
754 if (!req->data_is_ptr) {
755 if (req->dir == IOREQ_READ) {
756 for (i = 0; i < req->count; i++) {
a3864829 757 read_phys_req_item(req->addr, req, i, &req->data);
9ce94e7c
AS
758 }
759 } else if (req->dir == IOREQ_WRITE) {
760 for (i = 0; i < req->count; i++) {
a3864829 761 write_phys_req_item(req->addr, req, i, &req->data);
9ce94e7c
AS
762 }
763 }
764 } else {
2b734340 765 uint64_t tmp;
9ce94e7c
AS
766
767 if (req->dir == IOREQ_READ) {
768 for (i = 0; i < req->count; i++) {
a3864829
IJ
769 read_phys_req_item(req->addr, req, i, &tmp);
770 write_phys_req_item(req->data, req, i, &tmp);
9ce94e7c
AS
771 }
772 } else if (req->dir == IOREQ_WRITE) {
773 for (i = 0; i < req->count; i++) {
a3864829
IJ
774 read_phys_req_item(req->data, req, i, &tmp);
775 write_phys_req_item(req->addr, req, i, &tmp);
9ce94e7c
AS
776 }
777 }
778 }
779}
780
781static void handle_ioreq(ioreq_t *req)
782{
783 if (!req->data_is_ptr && (req->dir == IOREQ_WRITE) &&
784 (req->size < sizeof (target_ulong))) {
785 req->data &= ((target_ulong) 1 << (8 * req->size)) - 1;
786 }
787
788 switch (req->type) {
789 case IOREQ_TYPE_PIO:
790 cpu_ioreq_pio(req);
791 break;
792 case IOREQ_TYPE_COPY:
793 cpu_ioreq_move(req);
794 break;
795 case IOREQ_TYPE_TIMEOFFSET:
796 break;
797 case IOREQ_TYPE_INVALIDATE:
e41d7c69 798 xen_invalidate_map_cache();
9ce94e7c
AS
799 break;
800 default:
801 hw_error("Invalid ioreq type 0x%x\n", req->type);
802 }
803}
804
fda1f768 805static int handle_buffered_iopage(XenIOState *state)
9ce94e7c
AS
806{
807 buf_ioreq_t *buf_req = NULL;
808 ioreq_t req;
809 int qw;
810
811 if (!state->buffered_io_page) {
fda1f768 812 return 0;
9ce94e7c
AS
813 }
814
fda1f768
SS
815 memset(&req, 0x00, sizeof(req));
816
9ce94e7c
AS
817 while (state->buffered_io_page->read_pointer != state->buffered_io_page->write_pointer) {
818 buf_req = &state->buffered_io_page->buf_ioreq[
819 state->buffered_io_page->read_pointer % IOREQ_BUFFER_SLOT_NUM];
820 req.size = 1UL << buf_req->size;
821 req.count = 1;
822 req.addr = buf_req->addr;
823 req.data = buf_req->data;
824 req.state = STATE_IOREQ_READY;
825 req.dir = buf_req->dir;
826 req.df = 1;
827 req.type = buf_req->type;
828 req.data_is_ptr = 0;
829 qw = (req.size == 8);
830 if (qw) {
831 buf_req = &state->buffered_io_page->buf_ioreq[
832 (state->buffered_io_page->read_pointer + 1) % IOREQ_BUFFER_SLOT_NUM];
833 req.data |= ((uint64_t)buf_req->data) << 32;
834 }
835
836 handle_ioreq(&req);
837
838 xen_mb();
839 state->buffered_io_page->read_pointer += qw ? 2 : 1;
840 }
fda1f768
SS
841
842 return req.count;
9ce94e7c
AS
843}
844
845static void handle_buffered_io(void *opaque)
846{
847 XenIOState *state = opaque;
848
fda1f768
SS
849 if (handle_buffered_iopage(state)) {
850 qemu_mod_timer(state->buffered_io_timer,
851 BUFFER_IO_MAX_DELAY + qemu_get_clock_ms(rt_clock));
852 } else {
853 qemu_del_timer(state->buffered_io_timer);
854 xc_evtchn_unmask(state->xce_handle, state->bufioreq_local_port);
855 }
9ce94e7c
AS
856}
857
858static void cpu_handle_ioreq(void *opaque)
859{
860 XenIOState *state = opaque;
861 ioreq_t *req = cpu_get_ioreq(state);
862
863 handle_buffered_iopage(state);
864 if (req) {
865 handle_ioreq(req);
866
867 if (req->state != STATE_IOREQ_INPROCESS) {
868 fprintf(stderr, "Badness in I/O request ... not in service?!: "
869 "%x, ptr: %x, port: %"PRIx64", "
870 "data: %"PRIx64", count: %" FMT_ioreq_size ", size: %" FMT_ioreq_size "\n",
871 req->state, req->data_is_ptr, req->addr,
872 req->data, req->count, req->size);
180640ea 873 destroy_hvm_domain(false);
9ce94e7c
AS
874 return;
875 }
876
877 xen_wmb(); /* Update ioreq contents /then/ update state. */
878
879 /*
880 * We do this before we send the response so that the tools
881 * have the opportunity to pick up on the reset before the
882 * guest resumes and does a hlt with interrupts disabled which
883 * causes Xen to powerdown the domain.
884 */
1354869c 885 if (runstate_is_running()) {
9ce94e7c 886 if (qemu_shutdown_requested_get()) {
180640ea 887 destroy_hvm_domain(false);
9ce94e7c
AS
888 }
889 if (qemu_reset_requested_get()) {
e063eb1f 890 qemu_system_reset(VMRESET_REPORT);
180640ea 891 destroy_hvm_domain(true);
9ce94e7c
AS
892 }
893 }
894
895 req->state = STATE_IORESP_READY;
896 xc_evtchn_notify(state->xce_handle, state->ioreq_local_port[state->send_vcpu]);
897 }
898}
899
0f51726a
SS
900static int store_dev_info(int domid, CharDriverState *cs, const char *string)
901{
902 struct xs_handle *xs = NULL;
903 char *path = NULL;
904 char *newpath = NULL;
905 char *pts = NULL;
906 int ret = -1;
907
908 /* Only continue if we're talking to a pty. */
909 if (strncmp(cs->filename, "pty:", 4)) {
910 return 0;
911 }
912 pts = cs->filename + 4;
913
914 /* We now have everything we need to set the xenstore entry. */
915 xs = xs_open(0);
916 if (xs == NULL) {
917 fprintf(stderr, "Could not contact XenStore\n");
918 goto out;
919 }
920
921 path = xs_get_domain_path(xs, domid);
922 if (path == NULL) {
923 fprintf(stderr, "xs_get_domain_path() error\n");
924 goto out;
925 }
926 newpath = realloc(path, (strlen(path) + strlen(string) +
927 strlen("/tty") + 1));
928 if (newpath == NULL) {
929 fprintf(stderr, "realloc error\n");
930 goto out;
931 }
932 path = newpath;
933
934 strcat(path, string);
935 strcat(path, "/tty");
936 if (!xs_write(xs, XBT_NULL, path, pts, strlen(pts))) {
937 fprintf(stderr, "xs_write for '%s' fail", string);
938 goto out;
939 }
940 ret = 0;
941
942out:
943 free(path);
944 xs_close(xs);
945
946 return ret;
947}
948
949void xenstore_store_pv_console_info(int i, CharDriverState *chr)
950{
951 if (i == 0) {
952 store_dev_info(xen_domid, chr, "/console");
953 } else {
954 char buf[32];
955 snprintf(buf, sizeof(buf), "/device/console/%d", i);
956 store_dev_info(xen_domid, chr, buf);
957 }
958}
959
fb4bb2b5 960static void xenstore_record_dm_state(struct xs_handle *xs, const char *state)
29321335
AP
961{
962 char path[50];
963
fb4bb2b5
AP
964 if (xs == NULL) {
965 fprintf(stderr, "xenstore connection not initialized\n");
966 exit(1);
967 }
968
29321335 969 snprintf(path, sizeof (path), "/local/domain/0/device-model/%u/state", xen_domid);
fb4bb2b5 970 if (!xs_write(xs, XBT_NULL, path, state, strlen(state))) {
29321335
AP
971 fprintf(stderr, "error recording dm state\n");
972 exit(1);
973 }
974}
975
9ce94e7c
AS
976static void xen_main_loop_prepare(XenIOState *state)
977{
978 int evtchn_fd = -1;
979
980 if (state->xce_handle != XC_HANDLER_INITIAL_VALUE) {
981 evtchn_fd = xc_evtchn_fd(state->xce_handle);
982 }
983
984 state->buffered_io_timer = qemu_new_timer_ms(rt_clock, handle_buffered_io,
985 state);
9ce94e7c
AS
986
987 if (evtchn_fd != -1) {
988 qemu_set_fd_handler(evtchn_fd, cpu_handle_ioreq, NULL, state);
989 }
990}
991
992
3285cf4f
AP
993/* Initialise Xen */
994
1dfb4dd9
LC
995static void xen_change_state_handler(void *opaque, int running,
996 RunState state)
fb4bb2b5
AP
997{
998 if (running) {
999 /* record state running */
1000 xenstore_record_dm_state(xenstore, "running");
1001 }
1002}
1003
1dfb4dd9
LC
1004static void xen_hvm_change_state_handler(void *opaque, int running,
1005 RunState rstate)
9ce94e7c 1006{
1dfb4dd9 1007 XenIOState *xstate = opaque;
9ce94e7c 1008 if (running) {
1dfb4dd9 1009 xen_main_loop_prepare(xstate);
9ce94e7c
AS
1010 }
1011}
1012
9e8dd451 1013static void xen_exit_notifier(Notifier *n, void *data)
9ce94e7c
AS
1014{
1015 XenIOState *state = container_of(n, XenIOState, exit);
1016
1017 xc_evtchn_close(state->xce_handle);
29321335 1018 xs_daemon_close(state->xenstore);
9ce94e7c
AS
1019}
1020
3285cf4f
AP
1021int xen_init(void)
1022{
1023 xen_xc = xen_xc_interface_open(0, 0, 0);
1024 if (xen_xc == XC_HANDLER_INITIAL_VALUE) {
1025 xen_be_printf(NULL, 0, "can't open xen interface\n");
1026 return -1;
1027 }
fb4bb2b5 1028 qemu_add_vm_change_state_handler(xen_change_state_handler, NULL);
3285cf4f
AP
1029
1030 return 0;
1031}
29d3ccde 1032
d1814e08
SS
1033static void xen_read_physmap(XenIOState *state)
1034{
1035 XenPhysmap *physmap = NULL;
1036 unsigned int len, num, i;
1037 char path[80], *value = NULL;
1038 char **entries = NULL;
1039
1040 snprintf(path, sizeof(path),
1041 "/local/domain/0/device-model/%d/physmap", xen_domid);
1042 entries = xs_directory(state->xenstore, 0, path, &num);
1043 if (entries == NULL)
1044 return;
1045
1046 for (i = 0; i < num; i++) {
1047 physmap = g_malloc(sizeof (XenPhysmap));
1048 physmap->phys_offset = strtoull(entries[i], NULL, 16);
1049 snprintf(path, sizeof(path),
1050 "/local/domain/0/device-model/%d/physmap/%s/start_addr",
1051 xen_domid, entries[i]);
1052 value = xs_read(state->xenstore, 0, path, &len);
1053 if (value == NULL) {
1054 free(physmap);
1055 continue;
1056 }
1057 physmap->start_addr = strtoull(value, NULL, 16);
1058 free(value);
1059
1060 snprintf(path, sizeof(path),
1061 "/local/domain/0/device-model/%d/physmap/%s/size",
1062 xen_domid, entries[i]);
1063 value = xs_read(state->xenstore, 0, path, &len);
1064 if (value == NULL) {
1065 free(physmap);
1066 continue;
1067 }
1068 physmap->size = strtoull(value, NULL, 16);
1069 free(value);
1070
1071 snprintf(path, sizeof(path),
1072 "/local/domain/0/device-model/%d/physmap/%s/name",
1073 xen_domid, entries[i]);
1074 physmap->name = xs_read(state->xenstore, 0, path, &len);
1075
1076 QLIST_INSERT_HEAD(&state->physmap, physmap, list);
1077 }
1078 free(entries);
d1814e08
SS
1079}
1080
29d3ccde
AP
1081int xen_hvm_init(void)
1082{
9ce94e7c
AS
1083 int i, rc;
1084 unsigned long ioreq_pfn;
fda1f768 1085 unsigned long bufioreq_evtchn;
9ce94e7c
AS
1086 XenIOState *state;
1087
7267c094 1088 state = g_malloc0(sizeof (XenIOState));
9ce94e7c
AS
1089
1090 state->xce_handle = xen_xc_evtchn_open(NULL, 0);
1091 if (state->xce_handle == XC_HANDLER_INITIAL_VALUE) {
1092 perror("xen: event channel open");
1093 return -errno;
1094 }
1095
29321335
AP
1096 state->xenstore = xs_daemon_open();
1097 if (state->xenstore == NULL) {
1098 perror("xen: xenstore open");
1099 return -errno;
1100 }
1101
9ce94e7c
AS
1102 state->exit.notify = xen_exit_notifier;
1103 qemu_add_exit_notifier(&state->exit);
1104
da98c8eb
GH
1105 state->suspend.notify = xen_suspend_notifier;
1106 qemu_register_suspend_notifier(&state->suspend);
1107
9ce94e7c
AS
1108 xc_get_hvm_param(xen_xc, xen_domid, HVM_PARAM_IOREQ_PFN, &ioreq_pfn);
1109 DPRINTF("shared page at pfn %lx\n", ioreq_pfn);
1110 state->shared_page = xc_map_foreign_range(xen_xc, xen_domid, XC_PAGE_SIZE,
1111 PROT_READ|PROT_WRITE, ioreq_pfn);
1112 if (state->shared_page == NULL) {
1113 hw_error("map shared IO page returned error %d handle=" XC_INTERFACE_FMT,
1114 errno, xen_xc);
1115 }
1116
1117 xc_get_hvm_param(xen_xc, xen_domid, HVM_PARAM_BUFIOREQ_PFN, &ioreq_pfn);
1118 DPRINTF("buffered io page at pfn %lx\n", ioreq_pfn);
1119 state->buffered_io_page = xc_map_foreign_range(xen_xc, xen_domid, XC_PAGE_SIZE,
1120 PROT_READ|PROT_WRITE, ioreq_pfn);
1121 if (state->buffered_io_page == NULL) {
1122 hw_error("map buffered IO page returned error %d", errno);
1123 }
1124
7267c094 1125 state->ioreq_local_port = g_malloc0(smp_cpus * sizeof (evtchn_port_t));
9ce94e7c
AS
1126
1127 /* FIXME: how about if we overflow the page here? */
1128 for (i = 0; i < smp_cpus; i++) {
1129 rc = xc_evtchn_bind_interdomain(state->xce_handle, xen_domid,
1130 xen_vcpu_eport(state->shared_page, i));
1131 if (rc == -1) {
1132 fprintf(stderr, "bind interdomain ioctl error %d\n", errno);
1133 return -1;
1134 }
1135 state->ioreq_local_port[i] = rc;
1136 }
1137
fda1f768
SS
1138 rc = xc_get_hvm_param(xen_xc, xen_domid, HVM_PARAM_BUFIOREQ_EVTCHN,
1139 &bufioreq_evtchn);
1140 if (rc < 0) {
1141 fprintf(stderr, "failed to get HVM_PARAM_BUFIOREQ_EVTCHN\n");
1142 return -1;
1143 }
1144 rc = xc_evtchn_bind_interdomain(state->xce_handle, xen_domid,
1145 (uint32_t)bufioreq_evtchn);
1146 if (rc == -1) {
1147 fprintf(stderr, "bind interdomain ioctl error %d\n", errno);
1148 return -1;
1149 }
1150 state->bufioreq_local_port = rc;
1151
432d268c 1152 /* Init RAM management */
cd1ba7de 1153 xen_map_cache_init(xen_phys_offset_to_gaddr, state);
432d268c
JN
1154 xen_ram_init(ram_size);
1155
fb4bb2b5 1156 qemu_add_vm_change_state_handler(xen_hvm_change_state_handler, state);
9ce94e7c 1157
20581d20 1158 state->memory_listener = xen_memory_listener;
b4dd7802 1159 QLIST_INIT(&state->physmap);
f6790af6 1160 memory_listener_register(&state->memory_listener, &address_space_memory);
b4dd7802
AP
1161 state->log_for_dirtybit = NULL;
1162
ad35a7da
SS
1163 /* Initialize backend core & drivers */
1164 if (xen_be_init() != 0) {
1165 fprintf(stderr, "%s: xen backend core setup failed\n", __FUNCTION__);
1166 exit(1);
1167 }
1168 xen_be_register("console", &xen_console_ops);
37cdfcf1 1169 xen_be_register("vkbd", &xen_kbdmouse_ops);
ad35a7da 1170 xen_be_register("qdisk", &xen_blkdev_ops);
d1814e08 1171 xen_read_physmap(state);
ad35a7da 1172
29d3ccde
AP
1173 return 0;
1174}
9ce94e7c 1175
180640ea 1176void destroy_hvm_domain(bool reboot)
9ce94e7c
AS
1177{
1178 XenXC xc_handle;
1179 int sts;
1180
1181 xc_handle = xen_xc_interface_open(0, 0, 0);
1182 if (xc_handle == XC_HANDLER_INITIAL_VALUE) {
1183 fprintf(stderr, "Cannot acquire xenctrl handle\n");
1184 } else {
180640ea
JB
1185 sts = xc_domain_shutdown(xc_handle, xen_domid,
1186 reboot ? SHUTDOWN_reboot : SHUTDOWN_poweroff);
9ce94e7c 1187 if (sts != 0) {
180640ea
JB
1188 fprintf(stderr, "xc_domain_shutdown failed to issue %s, "
1189 "sts %d, %s\n", reboot ? "reboot" : "poweroff",
1190 sts, strerror(errno));
9ce94e7c 1191 } else {
180640ea
JB
1192 fprintf(stderr, "Issued domain %d %s\n", xen_domid,
1193 reboot ? "reboot" : "poweroff");
9ce94e7c
AS
1194 }
1195 xc_interface_close(xc_handle);
1196 }
1197}
c65adf9b
AK
1198
1199void xen_register_framebuffer(MemoryRegion *mr)
1200{
1201 framebuffer = mr;
1202}
eaab4d60
AK
1203
1204void xen_shutdown_fatal_error(const char *fmt, ...)
1205{
1206 va_list ap;
1207
1208 va_start(ap, fmt);
1209 vfprintf(stderr, fmt, ap);
1210 va_end(ap);
1211 fprintf(stderr, "Will destroy the domain.\n");
1212 /* destroy the domain */
1213 qemu_system_shutdown_request();
1214}
910b38e4
AP
1215
1216void xen_modified_memory(ram_addr_t start, ram_addr_t length)
1217{
1218 if (unlikely(xen_in_migration)) {
1219 int rc;
1220 ram_addr_t start_pfn, nb_pages;
1221
1222 if (length == 0) {
1223 length = TARGET_PAGE_SIZE;
1224 }
1225 start_pfn = start >> TARGET_PAGE_BITS;
1226 nb_pages = ((start + length + TARGET_PAGE_SIZE - 1) >> TARGET_PAGE_BITS)
1227 - start_pfn;
1228 rc = xc_hvm_modified_memory(xen_xc, xen_domid, start_pfn, nb_pages);
1229 if (rc) {
1230 fprintf(stderr,
1231 "%s failed for "RAM_ADDR_FMT" ("RAM_ADDR_FMT"): %i, %s\n",
1232 __func__, start, nb_pages, rc, strerror(-rc));
1233 }
1234 }
1235}