Merge commit '92aa5c6d77ac29574c1717bcf57827fa1e586f31' into upstream-merge
[qemu-kvm.git] / xen-all.c
blobf76b051eee2d9f0a98a0be7d75d5928ac6cc108a
1 /*
2 * Copyright (C) 2010 Citrix Ltd.
4 * This work is licensed under the terms of the GNU GPL, version 2. See
5 * the COPYING file in the top-level directory.
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.
9 */
11 #include <sys/mman.h>
13 #include "hw/pci.h"
14 #include "hw/pc.h"
15 #include "hw/xen_common.h"
16 #include "hw/xen_backend.h"
18 #include "range.h"
19 #include "xen-mapcache.h"
20 #include "trace.h"
21 #include "exec-memory.h"
23 #include <xen/hvm/ioreq.h>
24 #include <xen/hvm/params.h>
25 #include <xen/hvm/e820.h>
27 //#define DEBUG_XEN
29 #ifdef DEBUG_XEN
30 #define DPRINTF(fmt, ...) \
31 do { fprintf(stderr, "xen: " fmt, ## __VA_ARGS__); } while (0)
32 #else
33 #define DPRINTF(fmt, ...) \
34 do { } while (0)
35 #endif
37 static MemoryRegion ram_memory, ram_640k, ram_lo, ram_hi;
38 static MemoryRegion *framebuffer;
40 /* Compatibility with older version */
41 #if __XEN_LATEST_INTERFACE_VERSION__ < 0x0003020a
42 static inline uint32_t xen_vcpu_eport(shared_iopage_t *shared_page, int i)
44 return shared_page->vcpu_iodata[i].vp_eport;
46 static inline ioreq_t *xen_vcpu_ioreq(shared_iopage_t *shared_page, int vcpu)
48 return &shared_page->vcpu_iodata[vcpu].vp_ioreq;
50 # define FMT_ioreq_size PRIx64
51 #else
52 static inline uint32_t xen_vcpu_eport(shared_iopage_t *shared_page, int i)
54 return shared_page->vcpu_ioreq[i].vp_eport;
56 static inline ioreq_t *xen_vcpu_ioreq(shared_iopage_t *shared_page, int vcpu)
58 return &shared_page->vcpu_ioreq[vcpu];
60 # define FMT_ioreq_size "u"
61 #endif
62 #ifndef HVM_PARAM_BUFIOREQ_EVTCHN
63 #define HVM_PARAM_BUFIOREQ_EVTCHN 26
64 #endif
66 #define BUFFER_IO_MAX_DELAY 100
68 typedef struct XenPhysmap {
69 target_phys_addr_t start_addr;
70 ram_addr_t size;
71 char *name;
72 target_phys_addr_t phys_offset;
74 QLIST_ENTRY(XenPhysmap) list;
75 } XenPhysmap;
77 typedef struct XenIOState {
78 shared_iopage_t *shared_page;
79 buffered_iopage_t *buffered_io_page;
80 QEMUTimer *buffered_io_timer;
81 /* the evtchn port for polling the notification, */
82 evtchn_port_t *ioreq_local_port;
83 /* evtchn local port for buffered io */
84 evtchn_port_t bufioreq_local_port;
85 /* the evtchn fd for polling */
86 XenEvtchn xce_handle;
87 /* which vcpu we are serving */
88 int send_vcpu;
90 struct xs_handle *xenstore;
91 MemoryListener memory_listener;
92 QLIST_HEAD(, XenPhysmap) physmap;
93 target_phys_addr_t free_phys_offset;
94 const XenPhysmap *log_for_dirtybit;
96 Notifier exit;
97 Notifier suspend;
98 } XenIOState;
100 /* Xen specific function for piix pci */
102 int xen_pci_slot_get_pirq(PCIDevice *pci_dev, int irq_num)
104 return irq_num + ((pci_dev->devfn >> 3) << 2);
107 void xen_piix3_set_irq(void *opaque, int irq_num, int level)
109 xc_hvm_set_pci_intx_level(xen_xc, xen_domid, 0, 0, irq_num >> 2,
110 irq_num & 3, level);
113 void xen_piix_pci_write_config_client(uint32_t address, uint32_t val, int len)
115 int i;
117 /* Scan for updates to PCI link routes (0x60-0x63). */
118 for (i = 0; i < len; i++) {
119 uint8_t v = (val >> (8 * i)) & 0xff;
120 if (v & 0x80) {
121 v = 0;
123 v &= 0xf;
124 if (((address + i) >= 0x60) && ((address + i) <= 0x63)) {
125 xc_hvm_set_pci_link_route(xen_xc, xen_domid, address + i - 0x60, v);
130 void xen_hvm_inject_msi(uint64_t addr, uint32_t data)
132 xen_xc_hvm_inject_msi(xen_xc, xen_domid, addr, data);
135 static void xen_suspend_notifier(Notifier *notifier, void *data)
137 xc_set_hvm_param(xen_xc, xen_domid, HVM_PARAM_ACPI_S_STATE, 3);
140 /* Xen Interrupt Controller */
142 static void xen_set_irq(void *opaque, int irq, int level)
144 xc_hvm_set_isa_irq_level(xen_xc, xen_domid, irq, level);
147 qemu_irq *xen_interrupt_controller_init(void)
149 return qemu_allocate_irqs(xen_set_irq, NULL, 16);
152 /* Memory Ops */
154 static void xen_ram_init(ram_addr_t ram_size)
156 MemoryRegion *sysmem = get_system_memory();
157 ram_addr_t below_4g_mem_size, above_4g_mem_size = 0;
158 ram_addr_t block_len;
160 block_len = ram_size;
161 if (ram_size >= HVM_BELOW_4G_RAM_END) {
162 /* Xen does not allocate the memory continuously, and keep a hole at
163 * HVM_BELOW_4G_MMIO_START of HVM_BELOW_4G_MMIO_LENGTH
165 block_len += HVM_BELOW_4G_MMIO_LENGTH;
167 memory_region_init_ram(&ram_memory, "xen.ram", block_len);
168 vmstate_register_ram_global(&ram_memory);
170 if (ram_size >= HVM_BELOW_4G_RAM_END) {
171 above_4g_mem_size = ram_size - HVM_BELOW_4G_RAM_END;
172 below_4g_mem_size = HVM_BELOW_4G_RAM_END;
173 } else {
174 below_4g_mem_size = ram_size;
177 memory_region_init_alias(&ram_640k, "xen.ram.640k",
178 &ram_memory, 0, 0xa0000);
179 memory_region_add_subregion(sysmem, 0, &ram_640k);
180 /* Skip of the VGA IO memory space, it will be registered later by the VGA
181 * emulated device.
183 * The area between 0xc0000 and 0x100000 will be used by SeaBIOS to load
184 * the Options ROM, so it is registered here as RAM.
186 memory_region_init_alias(&ram_lo, "xen.ram.lo",
187 &ram_memory, 0xc0000, below_4g_mem_size - 0xc0000);
188 memory_region_add_subregion(sysmem, 0xc0000, &ram_lo);
189 if (above_4g_mem_size > 0) {
190 memory_region_init_alias(&ram_hi, "xen.ram.hi",
191 &ram_memory, 0x100000000ULL,
192 above_4g_mem_size);
193 memory_region_add_subregion(sysmem, 0x100000000ULL, &ram_hi);
197 void xen_ram_alloc(ram_addr_t ram_addr, ram_addr_t size, MemoryRegion *mr)
199 unsigned long nr_pfn;
200 xen_pfn_t *pfn_list;
201 int i;
203 if (runstate_check(RUN_STATE_INMIGRATE)) {
204 /* RAM already populated in Xen */
205 fprintf(stderr, "%s: do not alloc "RAM_ADDR_FMT
206 " bytes of ram at "RAM_ADDR_FMT" when runstate is INMIGRATE\n",
207 __func__, size, ram_addr);
208 return;
211 if (mr == &ram_memory) {
212 return;
215 trace_xen_ram_alloc(ram_addr, size);
217 nr_pfn = size >> TARGET_PAGE_BITS;
218 pfn_list = g_malloc(sizeof (*pfn_list) * nr_pfn);
220 for (i = 0; i < nr_pfn; i++) {
221 pfn_list[i] = (ram_addr >> TARGET_PAGE_BITS) + i;
224 if (xc_domain_populate_physmap_exact(xen_xc, xen_domid, nr_pfn, 0, 0, pfn_list)) {
225 hw_error("xen: failed to populate ram at " RAM_ADDR_FMT, ram_addr);
228 g_free(pfn_list);
231 static XenPhysmap *get_physmapping(XenIOState *state,
232 target_phys_addr_t start_addr, ram_addr_t size)
234 XenPhysmap *physmap = NULL;
236 start_addr &= TARGET_PAGE_MASK;
238 QLIST_FOREACH(physmap, &state->physmap, list) {
239 if (range_covers_byte(physmap->start_addr, physmap->size, start_addr)) {
240 return physmap;
243 return NULL;
246 static target_phys_addr_t xen_phys_offset_to_gaddr(target_phys_addr_t start_addr,
247 ram_addr_t size, void *opaque)
249 target_phys_addr_t addr = start_addr & TARGET_PAGE_MASK;
250 XenIOState *xen_io_state = opaque;
251 XenPhysmap *physmap = NULL;
253 QLIST_FOREACH(physmap, &xen_io_state->physmap, list) {
254 if (range_covers_byte(physmap->phys_offset, physmap->size, addr)) {
255 return physmap->start_addr;
259 return start_addr;
262 #if CONFIG_XEN_CTRL_INTERFACE_VERSION >= 340
263 static int xen_add_to_physmap(XenIOState *state,
264 target_phys_addr_t start_addr,
265 ram_addr_t size,
266 MemoryRegion *mr,
267 target_phys_addr_t offset_within_region)
269 unsigned long i = 0;
270 int rc = 0;
271 XenPhysmap *physmap = NULL;
272 target_phys_addr_t pfn, start_gpfn;
273 target_phys_addr_t phys_offset = memory_region_get_ram_addr(mr);
274 char path[80], value[17];
276 if (get_physmapping(state, start_addr, size)) {
277 return 0;
279 if (size <= 0) {
280 return -1;
283 /* Xen can only handle a single dirty log region for now and we want
284 * the linear framebuffer to be that region.
285 * Avoid tracking any regions that is not videoram and avoid tracking
286 * the legacy vga region. */
287 if (mr == framebuffer && start_addr > 0xbffff) {
288 goto go_physmap;
290 return -1;
292 go_physmap:
293 DPRINTF("mapping vram to %llx - %llx\n", start_addr, start_addr + size);
295 pfn = phys_offset >> TARGET_PAGE_BITS;
296 start_gpfn = start_addr >> TARGET_PAGE_BITS;
297 for (i = 0; i < size >> TARGET_PAGE_BITS; i++) {
298 unsigned long idx = pfn + i;
299 xen_pfn_t gpfn = start_gpfn + i;
301 rc = xc_domain_add_to_physmap(xen_xc, xen_domid, XENMAPSPACE_gmfn, idx, gpfn);
302 if (rc) {
303 DPRINTF("add_to_physmap MFN %"PRI_xen_pfn" to PFN %"
304 PRI_xen_pfn" failed: %d\n", idx, gpfn, rc);
305 return -rc;
309 physmap = g_malloc(sizeof (XenPhysmap));
311 physmap->start_addr = start_addr;
312 physmap->size = size;
313 physmap->name = (char *)mr->name;
314 physmap->phys_offset = phys_offset;
316 QLIST_INSERT_HEAD(&state->physmap, physmap, list);
318 xc_domain_pin_memory_cacheattr(xen_xc, xen_domid,
319 start_addr >> TARGET_PAGE_BITS,
320 (start_addr + size) >> TARGET_PAGE_BITS,
321 XEN_DOMCTL_MEM_CACHEATTR_WB);
323 snprintf(path, sizeof(path),
324 "/local/domain/0/device-model/%d/physmap/%"PRIx64"/start_addr",
325 xen_domid, (uint64_t)phys_offset);
326 snprintf(value, sizeof(value), "%"PRIx64, (uint64_t)start_addr);
327 if (!xs_write(state->xenstore, 0, path, value, strlen(value))) {
328 return -1;
330 snprintf(path, sizeof(path),
331 "/local/domain/0/device-model/%d/physmap/%"PRIx64"/size",
332 xen_domid, (uint64_t)phys_offset);
333 snprintf(value, sizeof(value), "%"PRIx64, (uint64_t)size);
334 if (!xs_write(state->xenstore, 0, path, value, strlen(value))) {
335 return -1;
337 if (mr->name) {
338 snprintf(path, sizeof(path),
339 "/local/domain/0/device-model/%d/physmap/%"PRIx64"/name",
340 xen_domid, (uint64_t)phys_offset);
341 if (!xs_write(state->xenstore, 0, path, mr->name, strlen(mr->name))) {
342 return -1;
346 return 0;
349 static int xen_remove_from_physmap(XenIOState *state,
350 target_phys_addr_t start_addr,
351 ram_addr_t size)
353 unsigned long i = 0;
354 int rc = 0;
355 XenPhysmap *physmap = NULL;
356 target_phys_addr_t phys_offset = 0;
358 physmap = get_physmapping(state, start_addr, size);
359 if (physmap == NULL) {
360 return -1;
363 phys_offset = physmap->phys_offset;
364 size = physmap->size;
366 DPRINTF("unmapping vram to %llx - %llx, from %llx\n",
367 phys_offset, phys_offset + size, start_addr);
369 size >>= TARGET_PAGE_BITS;
370 start_addr >>= TARGET_PAGE_BITS;
371 phys_offset >>= TARGET_PAGE_BITS;
372 for (i = 0; i < size; i++) {
373 unsigned long idx = start_addr + i;
374 xen_pfn_t gpfn = phys_offset + i;
376 rc = xc_domain_add_to_physmap(xen_xc, xen_domid, XENMAPSPACE_gmfn, idx, gpfn);
377 if (rc) {
378 fprintf(stderr, "add_to_physmap MFN %"PRI_xen_pfn" to PFN %"
379 PRI_xen_pfn" failed: %d\n", idx, gpfn, rc);
380 return -rc;
384 QLIST_REMOVE(physmap, list);
385 if (state->log_for_dirtybit == physmap) {
386 state->log_for_dirtybit = NULL;
388 free(physmap);
390 return 0;
393 #else
394 static int xen_add_to_physmap(XenIOState *state,
395 target_phys_addr_t start_addr,
396 ram_addr_t size,
397 MemoryRegion *mr,
398 target_phys_addr_t offset_within_region)
400 return -ENOSYS;
403 static int xen_remove_from_physmap(XenIOState *state,
404 target_phys_addr_t start_addr,
405 ram_addr_t size)
407 return -ENOSYS;
409 #endif
411 static void xen_set_memory(struct MemoryListener *listener,
412 MemoryRegionSection *section,
413 bool add)
415 XenIOState *state = container_of(listener, XenIOState, memory_listener);
416 target_phys_addr_t start_addr = section->offset_within_address_space;
417 ram_addr_t size = section->size;
418 bool log_dirty = memory_region_is_logging(section->mr);
419 hvmmem_type_t mem_type;
421 if (!memory_region_is_ram(section->mr)) {
422 return;
425 if (!(section->mr != &ram_memory
426 && ( (log_dirty && add) || (!log_dirty && !add)))) {
427 return;
430 trace_xen_client_set_memory(start_addr, size, log_dirty);
432 start_addr &= TARGET_PAGE_MASK;
433 size = TARGET_PAGE_ALIGN(size);
435 if (add) {
436 if (!memory_region_is_rom(section->mr)) {
437 xen_add_to_physmap(state, start_addr, size,
438 section->mr, section->offset_within_region);
439 } else {
440 mem_type = HVMMEM_ram_ro;
441 if (xc_hvm_set_mem_type(xen_xc, xen_domid, mem_type,
442 start_addr >> TARGET_PAGE_BITS,
443 size >> TARGET_PAGE_BITS)) {
444 DPRINTF("xc_hvm_set_mem_type error, addr: "TARGET_FMT_plx"\n",
445 start_addr);
448 } else {
449 if (xen_remove_from_physmap(state, start_addr, size) < 0) {
450 DPRINTF("physmapping does not exist at "TARGET_FMT_plx"\n", start_addr);
455 static void xen_begin(MemoryListener *listener)
459 static void xen_commit(MemoryListener *listener)
463 static void xen_region_add(MemoryListener *listener,
464 MemoryRegionSection *section)
466 xen_set_memory(listener, section, true);
469 static void xen_region_del(MemoryListener *listener,
470 MemoryRegionSection *section)
472 xen_set_memory(listener, section, false);
475 static void xen_region_nop(MemoryListener *listener,
476 MemoryRegionSection *section)
480 static void xen_sync_dirty_bitmap(XenIOState *state,
481 target_phys_addr_t start_addr,
482 ram_addr_t size)
484 target_phys_addr_t npages = size >> TARGET_PAGE_BITS;
485 const int width = sizeof(unsigned long) * 8;
486 unsigned long bitmap[(npages + width - 1) / width];
487 int rc, i, j;
488 const XenPhysmap *physmap = NULL;
490 physmap = get_physmapping(state, start_addr, size);
491 if (physmap == NULL) {
492 /* not handled */
493 return;
496 if (state->log_for_dirtybit == NULL) {
497 state->log_for_dirtybit = physmap;
498 } else if (state->log_for_dirtybit != physmap) {
499 /* Only one range for dirty bitmap can be tracked. */
500 return;
503 rc = xc_hvm_track_dirty_vram(xen_xc, xen_domid,
504 start_addr >> TARGET_PAGE_BITS, npages,
505 bitmap);
506 if (rc < 0) {
507 if (rc != -ENODATA) {
508 fprintf(stderr, "xen: track_dirty_vram failed (0x" TARGET_FMT_plx
509 ", 0x" TARGET_FMT_plx "): %s\n",
510 start_addr, start_addr + size, strerror(-rc));
512 return;
515 for (i = 0; i < ARRAY_SIZE(bitmap); i++) {
516 unsigned long map = bitmap[i];
517 while (map != 0) {
518 j = ffsl(map) - 1;
519 map &= ~(1ul << j);
520 memory_region_set_dirty(framebuffer,
521 (i * width + j) * TARGET_PAGE_SIZE,
522 TARGET_PAGE_SIZE);
527 static void xen_log_start(MemoryListener *listener,
528 MemoryRegionSection *section)
530 XenIOState *state = container_of(listener, XenIOState, memory_listener);
532 xen_sync_dirty_bitmap(state, section->offset_within_address_space,
533 section->size);
536 static void xen_log_stop(MemoryListener *listener, MemoryRegionSection *section)
538 XenIOState *state = container_of(listener, XenIOState, memory_listener);
540 state->log_for_dirtybit = NULL;
541 /* Disable dirty bit tracking */
542 xc_hvm_track_dirty_vram(xen_xc, xen_domid, 0, 0, NULL);
545 static void xen_log_sync(MemoryListener *listener, MemoryRegionSection *section)
547 XenIOState *state = container_of(listener, XenIOState, memory_listener);
549 xen_sync_dirty_bitmap(state, section->offset_within_address_space,
550 section->size);
553 static void xen_log_global_start(MemoryListener *listener)
557 static void xen_log_global_stop(MemoryListener *listener)
561 static void xen_eventfd_add(MemoryListener *listener,
562 MemoryRegionSection *section,
563 bool match_data, uint64_t data,
564 EventNotifier *e)
568 static void xen_eventfd_del(MemoryListener *listener,
569 MemoryRegionSection *section,
570 bool match_data, uint64_t data,
571 EventNotifier *e)
575 static MemoryListener xen_memory_listener = {
576 .begin = xen_begin,
577 .commit = xen_commit,
578 .region_add = xen_region_add,
579 .region_del = xen_region_del,
580 .region_nop = xen_region_nop,
581 .log_start = xen_log_start,
582 .log_stop = xen_log_stop,
583 .log_sync = xen_log_sync,
584 .log_global_start = xen_log_global_start,
585 .log_global_stop = xen_log_global_stop,
586 .eventfd_add = xen_eventfd_add,
587 .eventfd_del = xen_eventfd_del,
588 .priority = 10,
591 /* VCPU Operations, MMIO, IO ring ... */
593 static void xen_reset_vcpu(void *opaque)
595 CPUArchState *env = opaque;
597 env->halted = 1;
600 void xen_vcpu_init(void)
602 CPUArchState *first_cpu;
604 if ((first_cpu = qemu_get_cpu(0))) {
605 qemu_register_reset(xen_reset_vcpu, first_cpu);
606 xen_reset_vcpu(first_cpu);
608 /* if rtc_clock is left to default (host_clock), disable it */
609 if (rtc_clock == host_clock) {
610 qemu_clock_enable(rtc_clock, false);
614 /* get the ioreq packets from share mem */
615 static ioreq_t *cpu_get_ioreq_from_shared_memory(XenIOState *state, int vcpu)
617 ioreq_t *req = xen_vcpu_ioreq(state->shared_page, vcpu);
619 if (req->state != STATE_IOREQ_READY) {
620 DPRINTF("I/O request not ready: "
621 "%x, ptr: %x, port: %"PRIx64", "
622 "data: %"PRIx64", count: %" FMT_ioreq_size ", size: %" FMT_ioreq_size "\n",
623 req->state, req->data_is_ptr, req->addr,
624 req->data, req->count, req->size);
625 return NULL;
628 xen_rmb(); /* see IOREQ_READY /then/ read contents of ioreq */
630 req->state = STATE_IOREQ_INPROCESS;
631 return req;
634 /* use poll to get the port notification */
635 /* ioreq_vec--out,the */
636 /* retval--the number of ioreq packet */
637 static ioreq_t *cpu_get_ioreq(XenIOState *state)
639 int i;
640 evtchn_port_t port;
642 port = xc_evtchn_pending(state->xce_handle);
643 if (port == state->bufioreq_local_port) {
644 qemu_mod_timer(state->buffered_io_timer,
645 BUFFER_IO_MAX_DELAY + qemu_get_clock_ms(rt_clock));
646 return NULL;
649 if (port != -1) {
650 for (i = 0; i < smp_cpus; i++) {
651 if (state->ioreq_local_port[i] == port) {
652 break;
656 if (i == smp_cpus) {
657 hw_error("Fatal error while trying to get io event!\n");
660 /* unmask the wanted port again */
661 xc_evtchn_unmask(state->xce_handle, port);
663 /* get the io packet from shared memory */
664 state->send_vcpu = i;
665 return cpu_get_ioreq_from_shared_memory(state, i);
668 /* read error or read nothing */
669 return NULL;
672 static uint32_t do_inp(pio_addr_t addr, unsigned long size)
674 switch (size) {
675 case 1:
676 return cpu_inb(addr);
677 case 2:
678 return cpu_inw(addr);
679 case 4:
680 return cpu_inl(addr);
681 default:
682 hw_error("inp: bad size: %04"FMT_pioaddr" %lx", addr, size);
686 static void do_outp(pio_addr_t addr,
687 unsigned long size, uint32_t val)
689 switch (size) {
690 case 1:
691 return cpu_outb(addr, val);
692 case 2:
693 return cpu_outw(addr, val);
694 case 4:
695 return cpu_outl(addr, val);
696 default:
697 hw_error("outp: bad size: %04"FMT_pioaddr" %lx", addr, size);
701 static void cpu_ioreq_pio(ioreq_t *req)
703 int i, sign;
705 sign = req->df ? -1 : 1;
707 if (req->dir == IOREQ_READ) {
708 if (!req->data_is_ptr) {
709 req->data = do_inp(req->addr, req->size);
710 } else {
711 uint32_t tmp;
713 for (i = 0; i < req->count; i++) {
714 tmp = do_inp(req->addr, req->size);
715 cpu_physical_memory_write(
716 req->data + (sign * i * (int64_t)req->size),
717 (uint8_t *) &tmp, req->size);
720 } else if (req->dir == IOREQ_WRITE) {
721 if (!req->data_is_ptr) {
722 do_outp(req->addr, req->size, req->data);
723 } else {
724 for (i = 0; i < req->count; i++) {
725 uint32_t tmp = 0;
727 cpu_physical_memory_read(
728 req->data + (sign * i * (int64_t)req->size),
729 (uint8_t*) &tmp, req->size);
730 do_outp(req->addr, req->size, tmp);
736 static void cpu_ioreq_move(ioreq_t *req)
738 int i, sign;
740 sign = req->df ? -1 : 1;
742 if (!req->data_is_ptr) {
743 if (req->dir == IOREQ_READ) {
744 for (i = 0; i < req->count; i++) {
745 cpu_physical_memory_read(
746 req->addr + (sign * i * (int64_t)req->size),
747 (uint8_t *) &req->data, req->size);
749 } else if (req->dir == IOREQ_WRITE) {
750 for (i = 0; i < req->count; i++) {
751 cpu_physical_memory_write(
752 req->addr + (sign * i * (int64_t)req->size),
753 (uint8_t *) &req->data, req->size);
756 } else {
757 uint64_t tmp;
759 if (req->dir == IOREQ_READ) {
760 for (i = 0; i < req->count; i++) {
761 cpu_physical_memory_read(
762 req->addr + (sign * i * (int64_t)req->size),
763 (uint8_t*) &tmp, req->size);
764 cpu_physical_memory_write(
765 req->data + (sign * i * (int64_t)req->size),
766 (uint8_t*) &tmp, req->size);
768 } else if (req->dir == IOREQ_WRITE) {
769 for (i = 0; i < req->count; i++) {
770 cpu_physical_memory_read(
771 req->data + (sign * i * (int64_t)req->size),
772 (uint8_t*) &tmp, req->size);
773 cpu_physical_memory_write(
774 req->addr + (sign * i * (int64_t)req->size),
775 (uint8_t*) &tmp, req->size);
781 static void handle_ioreq(ioreq_t *req)
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;
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:
798 xen_invalidate_map_cache();
799 break;
800 default:
801 hw_error("Invalid ioreq type 0x%x\n", req->type);
805 static int handle_buffered_iopage(XenIOState *state)
807 buf_ioreq_t *buf_req = NULL;
808 ioreq_t req;
809 int qw;
811 if (!state->buffered_io_page) {
812 return 0;
815 memset(&req, 0x00, sizeof(req));
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;
836 handle_ioreq(&req);
838 xen_mb();
839 state->buffered_io_page->read_pointer += qw ? 2 : 1;
842 return req.count;
845 static void handle_buffered_io(void *opaque)
847 XenIOState *state = opaque;
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);
858 static void cpu_handle_ioreq(void *opaque)
860 XenIOState *state = opaque;
861 ioreq_t *req = cpu_get_ioreq(state);
863 handle_buffered_iopage(state);
864 if (req) {
865 handle_ioreq(req);
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);
873 destroy_hvm_domain(false);
874 return;
877 xen_wmb(); /* Update ioreq contents /then/ update state. */
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.
885 if (runstate_is_running()) {
886 if (qemu_shutdown_requested_get()) {
887 destroy_hvm_domain(false);
889 if (qemu_reset_requested_get()) {
890 qemu_system_reset(VMRESET_REPORT);
891 destroy_hvm_domain(true);
895 req->state = STATE_IORESP_READY;
896 xc_evtchn_notify(state->xce_handle, state->ioreq_local_port[state->send_vcpu]);
900 static int store_dev_info(int domid, CharDriverState *cs, const char *string)
902 struct xs_handle *xs = NULL;
903 char *path = NULL;
904 char *newpath = NULL;
905 char *pts = NULL;
906 int ret = -1;
908 /* Only continue if we're talking to a pty. */
909 if (strncmp(cs->filename, "pty:", 4)) {
910 return 0;
912 pts = cs->filename + 4;
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;
921 path = xs_get_domain_path(xs, domid);
922 if (path == NULL) {
923 fprintf(stderr, "xs_get_domain_path() error\n");
924 goto out;
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;
932 path = newpath;
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;
940 ret = 0;
942 out:
943 free(path);
944 xs_close(xs);
946 return ret;
949 void xenstore_store_pv_console_info(int i, CharDriverState *chr)
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);
960 static void xenstore_record_dm_state(struct xs_handle *xs, const char *state)
962 char path[50];
964 if (xs == NULL) {
965 fprintf(stderr, "xenstore connection not initialized\n");
966 exit(1);
969 snprintf(path, sizeof (path), "/local/domain/0/device-model/%u/state", xen_domid);
970 if (!xs_write(xs, XBT_NULL, path, state, strlen(state))) {
971 fprintf(stderr, "error recording dm state\n");
972 exit(1);
976 static void xen_main_loop_prepare(XenIOState *state)
978 int evtchn_fd = -1;
980 if (state->xce_handle != XC_HANDLER_INITIAL_VALUE) {
981 evtchn_fd = xc_evtchn_fd(state->xce_handle);
984 state->buffered_io_timer = qemu_new_timer_ms(rt_clock, handle_buffered_io,
985 state);
987 if (evtchn_fd != -1) {
988 qemu_set_fd_handler(evtchn_fd, cpu_handle_ioreq, NULL, state);
993 /* Initialise Xen */
995 static void xen_change_state_handler(void *opaque, int running,
996 RunState state)
998 if (running) {
999 /* record state running */
1000 xenstore_record_dm_state(xenstore, "running");
1004 static void xen_hvm_change_state_handler(void *opaque, int running,
1005 RunState rstate)
1007 XenIOState *xstate = opaque;
1008 if (running) {
1009 xen_main_loop_prepare(xstate);
1013 static void xen_exit_notifier(Notifier *n, void *data)
1015 XenIOState *state = container_of(n, XenIOState, exit);
1017 xc_evtchn_close(state->xce_handle);
1018 xs_daemon_close(state->xenstore);
1021 int xen_init(void)
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;
1028 qemu_add_vm_change_state_handler(xen_change_state_handler, NULL);
1030 return 0;
1033 static void xen_read_physmap(XenIOState *state)
1035 XenPhysmap *physmap = NULL;
1036 unsigned int len, num, i;
1037 char path[80], *value = NULL;
1038 char **entries = NULL;
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;
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;
1057 physmap->start_addr = strtoull(value, NULL, 16);
1058 free(value);
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;
1068 physmap->size = strtoull(value, NULL, 16);
1069 free(value);
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);
1076 QLIST_INSERT_HEAD(&state->physmap, physmap, list);
1078 free(entries);
1079 return;
1082 int xen_hvm_init(void)
1084 int i, rc;
1085 unsigned long ioreq_pfn;
1086 unsigned long bufioreq_evtchn;
1087 XenIOState *state;
1089 state = g_malloc0(sizeof (XenIOState));
1091 state->xce_handle = xen_xc_evtchn_open(NULL, 0);
1092 if (state->xce_handle == XC_HANDLER_INITIAL_VALUE) {
1093 perror("xen: event channel open");
1094 return -errno;
1097 state->xenstore = xs_daemon_open();
1098 if (state->xenstore == NULL) {
1099 perror("xen: xenstore open");
1100 return -errno;
1103 state->exit.notify = xen_exit_notifier;
1104 qemu_add_exit_notifier(&state->exit);
1106 state->suspend.notify = xen_suspend_notifier;
1107 qemu_register_suspend_notifier(&state->suspend);
1109 xc_get_hvm_param(xen_xc, xen_domid, HVM_PARAM_IOREQ_PFN, &ioreq_pfn);
1110 DPRINTF("shared page at pfn %lx\n", ioreq_pfn);
1111 state->shared_page = xc_map_foreign_range(xen_xc, xen_domid, XC_PAGE_SIZE,
1112 PROT_READ|PROT_WRITE, ioreq_pfn);
1113 if (state->shared_page == NULL) {
1114 hw_error("map shared IO page returned error %d handle=" XC_INTERFACE_FMT,
1115 errno, xen_xc);
1118 xc_get_hvm_param(xen_xc, xen_domid, HVM_PARAM_BUFIOREQ_PFN, &ioreq_pfn);
1119 DPRINTF("buffered io page at pfn %lx\n", ioreq_pfn);
1120 state->buffered_io_page = xc_map_foreign_range(xen_xc, xen_domid, XC_PAGE_SIZE,
1121 PROT_READ|PROT_WRITE, ioreq_pfn);
1122 if (state->buffered_io_page == NULL) {
1123 hw_error("map buffered IO page returned error %d", errno);
1126 state->ioreq_local_port = g_malloc0(smp_cpus * sizeof (evtchn_port_t));
1128 /* FIXME: how about if we overflow the page here? */
1129 for (i = 0; i < smp_cpus; i++) {
1130 rc = xc_evtchn_bind_interdomain(state->xce_handle, xen_domid,
1131 xen_vcpu_eport(state->shared_page, i));
1132 if (rc == -1) {
1133 fprintf(stderr, "bind interdomain ioctl error %d\n", errno);
1134 return -1;
1136 state->ioreq_local_port[i] = rc;
1139 rc = xc_get_hvm_param(xen_xc, xen_domid, HVM_PARAM_BUFIOREQ_EVTCHN,
1140 &bufioreq_evtchn);
1141 if (rc < 0) {
1142 fprintf(stderr, "failed to get HVM_PARAM_BUFIOREQ_EVTCHN\n");
1143 return -1;
1145 rc = xc_evtchn_bind_interdomain(state->xce_handle, xen_domid,
1146 (uint32_t)bufioreq_evtchn);
1147 if (rc == -1) {
1148 fprintf(stderr, "bind interdomain ioctl error %d\n", errno);
1149 return -1;
1151 state->bufioreq_local_port = rc;
1153 /* Init RAM management */
1154 xen_map_cache_init(xen_phys_offset_to_gaddr, state);
1155 xen_ram_init(ram_size);
1157 qemu_add_vm_change_state_handler(xen_hvm_change_state_handler, state);
1159 state->memory_listener = xen_memory_listener;
1160 QLIST_INIT(&state->physmap);
1161 memory_listener_register(&state->memory_listener, get_system_memory());
1162 state->log_for_dirtybit = NULL;
1164 /* Initialize backend core & drivers */
1165 if (xen_be_init() != 0) {
1166 fprintf(stderr, "%s: xen backend core setup failed\n", __FUNCTION__);
1167 exit(1);
1169 xen_be_register("console", &xen_console_ops);
1170 xen_be_register("vkbd", &xen_kbdmouse_ops);
1171 xen_be_register("qdisk", &xen_blkdev_ops);
1172 xen_read_physmap(state);
1174 return 0;
1177 void destroy_hvm_domain(bool reboot)
1179 XenXC xc_handle;
1180 int sts;
1182 xc_handle = xen_xc_interface_open(0, 0, 0);
1183 if (xc_handle == XC_HANDLER_INITIAL_VALUE) {
1184 fprintf(stderr, "Cannot acquire xenctrl handle\n");
1185 } else {
1186 sts = xc_domain_shutdown(xc_handle, xen_domid,
1187 reboot ? SHUTDOWN_reboot : SHUTDOWN_poweroff);
1188 if (sts != 0) {
1189 fprintf(stderr, "xc_domain_shutdown failed to issue %s, "
1190 "sts %d, %s\n", reboot ? "reboot" : "poweroff",
1191 sts, strerror(errno));
1192 } else {
1193 fprintf(stderr, "Issued domain %d %s\n", xen_domid,
1194 reboot ? "reboot" : "poweroff");
1196 xc_interface_close(xc_handle);
1200 void xen_register_framebuffer(MemoryRegion *mr)
1202 framebuffer = mr;
1205 void xen_shutdown_fatal_error(const char *fmt, ...)
1207 va_list ap;
1209 va_start(ap, fmt);
1210 vfprintf(stderr, fmt, ap);
1211 va_end(ap);
1212 fprintf(stderr, "Will destroy the domain.\n");
1213 /* destroy the domain */
1214 qemu_system_shutdown_request();