configure: Drop CONFIG_ATFILE test
[qemu/ar7.git] / xen-all.c
blobbc105f1627b39a8b4f3574f9e29cbcdf2729d4c2
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/pci.h"
14 #include "hw/i386/pc.h"
15 #include "hw/xen/xen_common.h"
16 #include "hw/xen/xen_backend.h"
17 #include "qmp-commands.h"
19 #include "sysemu/char.h"
20 #include "qemu/range.h"
21 #include "sysemu/xen-mapcache.h"
22 #include "trace.h"
23 #include "exec/address-spaces.h"
25 #include <xen/hvm/ioreq.h>
26 #include <xen/hvm/params.h>
27 #include <xen/hvm/e820.h>
29 //#define DEBUG_XEN
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
39 static MemoryRegion ram_memory, ram_640k, ram_lo, ram_hi;
40 static MemoryRegion *framebuffer;
41 static bool xen_in_migration;
43 /* Compatibility with older version */
44 #if __XEN_LATEST_INTERFACE_VERSION__ < 0x0003020a
45 static inline uint32_t xen_vcpu_eport(shared_iopage_t *shared_page, int i)
47 return shared_page->vcpu_iodata[i].vp_eport;
49 static inline ioreq_t *xen_vcpu_ioreq(shared_iopage_t *shared_page, int vcpu)
51 return &shared_page->vcpu_iodata[vcpu].vp_ioreq;
53 # define FMT_ioreq_size PRIx64
54 #else
55 static inline uint32_t xen_vcpu_eport(shared_iopage_t *shared_page, int i)
57 return shared_page->vcpu_ioreq[i].vp_eport;
59 static inline ioreq_t *xen_vcpu_ioreq(shared_iopage_t *shared_page, int vcpu)
61 return &shared_page->vcpu_ioreq[vcpu];
63 # define FMT_ioreq_size "u"
64 #endif
65 #ifndef HVM_PARAM_BUFIOREQ_EVTCHN
66 #define HVM_PARAM_BUFIOREQ_EVTCHN 26
67 #endif
69 #define BUFFER_IO_MAX_DELAY 100
71 typedef struct XenPhysmap {
72 hwaddr start_addr;
73 ram_addr_t size;
74 char *name;
75 hwaddr phys_offset;
77 QLIST_ENTRY(XenPhysmap) list;
78 } XenPhysmap;
80 typedef 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;
86 /* evtchn local port for buffered io */
87 evtchn_port_t bufioreq_local_port;
88 /* the evtchn fd for polling */
89 XenEvtchn xce_handle;
90 /* which vcpu we are serving */
91 int send_vcpu;
93 struct xs_handle *xenstore;
94 MemoryListener memory_listener;
95 QLIST_HEAD(, XenPhysmap) physmap;
96 hwaddr free_phys_offset;
97 const XenPhysmap *log_for_dirtybit;
99 Notifier exit;
100 Notifier suspend;
101 } XenIOState;
103 /* Xen specific function for piix pci */
105 int xen_pci_slot_get_pirq(PCIDevice *pci_dev, int irq_num)
107 return irq_num + ((pci_dev->devfn >> 3) << 2);
110 void xen_piix3_set_irq(void *opaque, int irq_num, int level)
112 xc_hvm_set_pci_intx_level(xen_xc, xen_domid, 0, 0, irq_num >> 2,
113 irq_num & 3, level);
116 void xen_piix_pci_write_config_client(uint32_t address, uint32_t val, int len)
118 int i;
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;
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);
133 void xen_hvm_inject_msi(uint64_t addr, uint32_t data)
135 xen_xc_hvm_inject_msi(xen_xc, xen_domid, addr, data);
138 static void xen_suspend_notifier(Notifier *notifier, void *data)
140 xc_set_hvm_param(xen_xc, xen_domid, HVM_PARAM_ACPI_S_STATE, 3);
143 /* Xen Interrupt Controller */
145 static void xen_set_irq(void *opaque, int irq, int level)
147 xc_hvm_set_isa_irq_level(xen_xc, xen_domid, irq, level);
150 qemu_irq *xen_interrupt_controller_init(void)
152 return qemu_allocate_irqs(xen_set_irq, NULL, 16);
155 /* Memory Ops */
157 static void xen_ram_init(ram_addr_t ram_size)
159 MemoryRegion *sysmem = get_system_memory();
160 ram_addr_t below_4g_mem_size, above_4g_mem_size = 0;
161 ram_addr_t block_len;
163 block_len = ram_size;
164 if (ram_size >= QEMU_BELOW_4G_RAM_END) {
165 /* Xen does not allocate the memory continuously, and keep a hole at
166 * QEMU_BELOW_4G_RAM_END of QEMU_BELOW_4G_MMIO_LENGTH
168 block_len += QEMU_BELOW_4G_MMIO_LENGTH;
170 memory_region_init_ram(&ram_memory, "xen.ram", block_len);
171 vmstate_register_ram_global(&ram_memory);
173 if (ram_size >= QEMU_BELOW_4G_RAM_END) {
174 above_4g_mem_size = ram_size - QEMU_BELOW_4G_RAM_END;
175 below_4g_mem_size = QEMU_BELOW_4G_RAM_END;
176 } else {
177 below_4g_mem_size = ram_size;
180 memory_region_init_alias(&ram_640k, "xen.ram.640k",
181 &ram_memory, 0, 0xa0000);
182 memory_region_add_subregion(sysmem, 0, &ram_640k);
183 /* Skip of the VGA IO memory space, it will be registered later by the VGA
184 * emulated device.
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.
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);
192 if (above_4g_mem_size > 0) {
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);
200 void xen_ram_alloc(ram_addr_t ram_addr, ram_addr_t size, MemoryRegion *mr)
202 unsigned long nr_pfn;
203 xen_pfn_t *pfn_list;
204 int i;
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;
214 if (mr == &ram_memory) {
215 return;
218 trace_xen_ram_alloc(ram_addr, size);
220 nr_pfn = size >> TARGET_PAGE_BITS;
221 pfn_list = g_malloc(sizeof (*pfn_list) * nr_pfn);
223 for (i = 0; i < nr_pfn; i++) {
224 pfn_list[i] = (ram_addr >> TARGET_PAGE_BITS) + i;
227 if (xc_domain_populate_physmap_exact(xen_xc, xen_domid, nr_pfn, 0, 0, pfn_list)) {
228 hw_error("xen: failed to populate ram at " RAM_ADDR_FMT, ram_addr);
231 g_free(pfn_list);
234 static XenPhysmap *get_physmapping(XenIOState *state,
235 hwaddr start_addr, ram_addr_t size)
237 XenPhysmap *physmap = NULL;
239 start_addr &= TARGET_PAGE_MASK;
241 QLIST_FOREACH(physmap, &state->physmap, list) {
242 if (range_covers_byte(physmap->start_addr, physmap->size, start_addr)) {
243 return physmap;
246 return NULL;
249 static hwaddr xen_phys_offset_to_gaddr(hwaddr start_addr,
250 ram_addr_t size, void *opaque)
252 hwaddr addr = start_addr & TARGET_PAGE_MASK;
253 XenIOState *xen_io_state = opaque;
254 XenPhysmap *physmap = NULL;
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;
262 return start_addr;
265 #if CONFIG_XEN_CTRL_INTERFACE_VERSION >= 340
266 static int xen_add_to_physmap(XenIOState *state,
267 hwaddr start_addr,
268 ram_addr_t size,
269 MemoryRegion *mr,
270 hwaddr offset_within_region)
272 unsigned long i = 0;
273 int rc = 0;
274 XenPhysmap *physmap = NULL;
275 hwaddr pfn, start_gpfn;
276 hwaddr phys_offset = memory_region_get_ram_addr(mr);
277 char path[80], value[17];
279 if (get_physmapping(state, start_addr, size)) {
280 return 0;
282 if (size <= 0) {
283 return -1;
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. */
290 if (mr == framebuffer && start_addr > 0xbffff) {
291 goto go_physmap;
293 return -1;
295 go_physmap:
296 DPRINTF("mapping vram to %"HWADDR_PRIx" - %"HWADDR_PRIx"\n",
297 start_addr, start_addr + size);
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;
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;
313 physmap = g_malloc(sizeof (XenPhysmap));
315 physmap->start_addr = start_addr;
316 physmap->size = size;
317 physmap->name = (char *)mr->name;
318 physmap->phys_offset = phys_offset;
320 QLIST_INSERT_HEAD(&state->physmap, physmap, list);
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);
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;
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;
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;
350 return 0;
353 static int xen_remove_from_physmap(XenIOState *state,
354 hwaddr start_addr,
355 ram_addr_t size)
357 unsigned long i = 0;
358 int rc = 0;
359 XenPhysmap *physmap = NULL;
360 hwaddr phys_offset = 0;
362 physmap = get_physmapping(state, start_addr, size);
363 if (physmap == NULL) {
364 return -1;
367 phys_offset = physmap->phys_offset;
368 size = physmap->size;
370 DPRINTF("unmapping vram to %"HWADDR_PRIx" - %"HWADDR_PRIx", from ",
371 "%"HWADDR_PRIx"\n", phys_offset, phys_offset + size, start_addr);
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;
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;
388 QLIST_REMOVE(physmap, list);
389 if (state->log_for_dirtybit == physmap) {
390 state->log_for_dirtybit = NULL;
392 free(physmap);
394 return 0;
397 #else
398 static int xen_add_to_physmap(XenIOState *state,
399 hwaddr start_addr,
400 ram_addr_t size,
401 MemoryRegion *mr,
402 hwaddr offset_within_region)
404 return -ENOSYS;
407 static int xen_remove_from_physmap(XenIOState *state,
408 hwaddr start_addr,
409 ram_addr_t size)
411 return -ENOSYS;
413 #endif
415 static void xen_set_memory(struct MemoryListener *listener,
416 MemoryRegionSection *section,
417 bool add)
419 XenIOState *state = container_of(listener, XenIOState, memory_listener);
420 hwaddr start_addr = section->offset_within_address_space;
421 ram_addr_t size = section->size;
422 bool log_dirty = memory_region_is_logging(section->mr);
423 hvmmem_type_t mem_type;
425 if (!memory_region_is_ram(section->mr)) {
426 return;
429 if (!(section->mr != &ram_memory
430 && ( (log_dirty && add) || (!log_dirty && !add)))) {
431 return;
434 trace_xen_client_set_memory(start_addr, size, log_dirty);
436 start_addr &= TARGET_PAGE_MASK;
437 size = TARGET_PAGE_ALIGN(size);
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);
452 } else {
453 if (xen_remove_from_physmap(state, start_addr, size) < 0) {
454 DPRINTF("physmapping does not exist at "TARGET_FMT_plx"\n", start_addr);
459 static void xen_region_add(MemoryListener *listener,
460 MemoryRegionSection *section)
462 xen_set_memory(listener, section, true);
465 static void xen_region_del(MemoryListener *listener,
466 MemoryRegionSection *section)
468 xen_set_memory(listener, section, false);
471 static void xen_sync_dirty_bitmap(XenIOState *state,
472 hwaddr start_addr,
473 ram_addr_t size)
475 hwaddr npages = size >> TARGET_PAGE_BITS;
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;
481 physmap = get_physmapping(state, start_addr, size);
482 if (physmap == NULL) {
483 /* not handled */
484 return;
487 if (state->log_for_dirtybit == NULL) {
488 state->log_for_dirtybit = physmap;
489 } else if (state->log_for_dirtybit != physmap) {
490 /* Only one range for dirty bitmap can be tracked. */
491 return;
494 rc = xc_hvm_track_dirty_vram(xen_xc, xen_domid,
495 start_addr >> TARGET_PAGE_BITS, npages,
496 bitmap);
497 if (rc < 0) {
498 if (rc != -ENODATA) {
499 memory_region_set_dirty(framebuffer, 0, size);
500 DPRINTF("xen: track_dirty_vram failed (0x" TARGET_FMT_plx
501 ", 0x" TARGET_FMT_plx "): %s\n",
502 start_addr, start_addr + size, strerror(-rc));
504 return;
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);
512 memory_region_set_dirty(framebuffer,
513 (i * width + j) * TARGET_PAGE_SIZE,
514 TARGET_PAGE_SIZE);
519 static void xen_log_start(MemoryListener *listener,
520 MemoryRegionSection *section)
522 XenIOState *state = container_of(listener, XenIOState, memory_listener);
524 xen_sync_dirty_bitmap(state, section->offset_within_address_space,
525 section->size);
528 static void xen_log_stop(MemoryListener *listener, MemoryRegionSection *section)
530 XenIOState *state = container_of(listener, XenIOState, memory_listener);
532 state->log_for_dirtybit = NULL;
533 /* Disable dirty bit tracking */
534 xc_hvm_track_dirty_vram(xen_xc, xen_domid, 0, 0, NULL);
537 static void xen_log_sync(MemoryListener *listener, MemoryRegionSection *section)
539 XenIOState *state = container_of(listener, XenIOState, memory_listener);
541 xen_sync_dirty_bitmap(state, section->offset_within_address_space,
542 section->size);
545 static void xen_log_global_start(MemoryListener *listener)
547 if (xen_enabled()) {
548 xen_in_migration = true;
552 static void xen_log_global_stop(MemoryListener *listener)
554 xen_in_migration = false;
557 static MemoryListener xen_memory_listener = {
558 .region_add = xen_region_add,
559 .region_del = xen_region_del,
560 .log_start = xen_log_start,
561 .log_stop = xen_log_stop,
562 .log_sync = xen_log_sync,
563 .log_global_start = xen_log_global_start,
564 .log_global_stop = xen_log_global_stop,
565 .priority = 10,
568 void qmp_xen_set_global_dirty_log(bool enable, Error **errp)
570 if (enable) {
571 memory_global_dirty_log_start();
572 } else {
573 memory_global_dirty_log_stop();
577 /* get the ioreq packets from share mem */
578 static ioreq_t *cpu_get_ioreq_from_shared_memory(XenIOState *state, int vcpu)
580 ioreq_t *req = xen_vcpu_ioreq(state->shared_page, vcpu);
582 if (req->state != STATE_IOREQ_READY) {
583 DPRINTF("I/O request not ready: "
584 "%x, ptr: %x, port: %"PRIx64", "
585 "data: %"PRIx64", count: %" FMT_ioreq_size ", size: %" FMT_ioreq_size "\n",
586 req->state, req->data_is_ptr, req->addr,
587 req->data, req->count, req->size);
588 return NULL;
591 xen_rmb(); /* see IOREQ_READY /then/ read contents of ioreq */
593 req->state = STATE_IOREQ_INPROCESS;
594 return req;
597 /* use poll to get the port notification */
598 /* ioreq_vec--out,the */
599 /* retval--the number of ioreq packet */
600 static ioreq_t *cpu_get_ioreq(XenIOState *state)
602 int i;
603 evtchn_port_t port;
605 port = xc_evtchn_pending(state->xce_handle);
606 if (port == state->bufioreq_local_port) {
607 qemu_mod_timer(state->buffered_io_timer,
608 BUFFER_IO_MAX_DELAY + qemu_get_clock_ms(rt_clock));
609 return NULL;
612 if (port != -1) {
613 for (i = 0; i < smp_cpus; i++) {
614 if (state->ioreq_local_port[i] == port) {
615 break;
619 if (i == smp_cpus) {
620 hw_error("Fatal error while trying to get io event!\n");
623 /* unmask the wanted port again */
624 xc_evtchn_unmask(state->xce_handle, port);
626 /* get the io packet from shared memory */
627 state->send_vcpu = i;
628 return cpu_get_ioreq_from_shared_memory(state, i);
631 /* read error or read nothing */
632 return NULL;
635 static uint32_t do_inp(pio_addr_t addr, unsigned long size)
637 switch (size) {
638 case 1:
639 return cpu_inb(addr);
640 case 2:
641 return cpu_inw(addr);
642 case 4:
643 return cpu_inl(addr);
644 default:
645 hw_error("inp: bad size: %04"FMT_pioaddr" %lx", addr, size);
649 static void do_outp(pio_addr_t addr,
650 unsigned long size, uint32_t val)
652 switch (size) {
653 case 1:
654 return cpu_outb(addr, val);
655 case 2:
656 return cpu_outw(addr, val);
657 case 4:
658 return cpu_outl(addr, val);
659 default:
660 hw_error("outp: bad size: %04"FMT_pioaddr" %lx", addr, size);
665 * Helper functions which read/write an object from/to physical guest
666 * memory, as part of the implementation of an ioreq.
668 * Equivalent to
669 * cpu_physical_memory_rw(addr + (req->df ? -1 : +1) * req->size * i,
670 * val, req->size, 0/1)
671 * except without the integer overflow problems.
673 static void rw_phys_req_item(hwaddr addr,
674 ioreq_t *req, uint32_t i, void *val, int rw)
676 /* Do everything unsigned so overflow just results in a truncated result
677 * and accesses to undesired parts of guest memory, which is up
678 * to the guest */
679 hwaddr offset = (hwaddr)req->size * i;
680 if (req->df) {
681 addr -= offset;
682 } else {
683 addr += offset;
685 cpu_physical_memory_rw(addr, val, req->size, rw);
688 static inline void read_phys_req_item(hwaddr addr,
689 ioreq_t *req, uint32_t i, void *val)
691 rw_phys_req_item(addr, req, i, val, 0);
693 static inline void write_phys_req_item(hwaddr addr,
694 ioreq_t *req, uint32_t i, void *val)
696 rw_phys_req_item(addr, req, i, val, 1);
700 static void cpu_ioreq_pio(ioreq_t *req)
702 uint32_t i;
704 if (req->dir == IOREQ_READ) {
705 if (!req->data_is_ptr) {
706 req->data = do_inp(req->addr, req->size);
707 } else {
708 uint32_t tmp;
710 for (i = 0; i < req->count; i++) {
711 tmp = do_inp(req->addr, req->size);
712 write_phys_req_item(req->data, req, i, &tmp);
715 } else if (req->dir == IOREQ_WRITE) {
716 if (!req->data_is_ptr) {
717 do_outp(req->addr, req->size, req->data);
718 } else {
719 for (i = 0; i < req->count; i++) {
720 uint32_t tmp = 0;
722 read_phys_req_item(req->data, req, i, &tmp);
723 do_outp(req->addr, req->size, tmp);
729 static void cpu_ioreq_move(ioreq_t *req)
731 uint32_t i;
733 if (!req->data_is_ptr) {
734 if (req->dir == IOREQ_READ) {
735 for (i = 0; i < req->count; i++) {
736 read_phys_req_item(req->addr, req, i, &req->data);
738 } else if (req->dir == IOREQ_WRITE) {
739 for (i = 0; i < req->count; i++) {
740 write_phys_req_item(req->addr, req, i, &req->data);
743 } else {
744 uint64_t tmp;
746 if (req->dir == IOREQ_READ) {
747 for (i = 0; i < req->count; i++) {
748 read_phys_req_item(req->addr, req, i, &tmp);
749 write_phys_req_item(req->data, req, i, &tmp);
751 } else if (req->dir == IOREQ_WRITE) {
752 for (i = 0; i < req->count; i++) {
753 read_phys_req_item(req->data, req, i, &tmp);
754 write_phys_req_item(req->addr, req, i, &tmp);
760 static void handle_ioreq(ioreq_t *req)
762 if (!req->data_is_ptr && (req->dir == IOREQ_WRITE) &&
763 (req->size < sizeof (target_ulong))) {
764 req->data &= ((target_ulong) 1 << (8 * req->size)) - 1;
767 switch (req->type) {
768 case IOREQ_TYPE_PIO:
769 cpu_ioreq_pio(req);
770 break;
771 case IOREQ_TYPE_COPY:
772 cpu_ioreq_move(req);
773 break;
774 case IOREQ_TYPE_TIMEOFFSET:
775 break;
776 case IOREQ_TYPE_INVALIDATE:
777 xen_invalidate_map_cache();
778 break;
779 default:
780 hw_error("Invalid ioreq type 0x%x\n", req->type);
784 static int handle_buffered_iopage(XenIOState *state)
786 buf_ioreq_t *buf_req = NULL;
787 ioreq_t req;
788 int qw;
790 if (!state->buffered_io_page) {
791 return 0;
794 memset(&req, 0x00, sizeof(req));
796 while (state->buffered_io_page->read_pointer != state->buffered_io_page->write_pointer) {
797 buf_req = &state->buffered_io_page->buf_ioreq[
798 state->buffered_io_page->read_pointer % IOREQ_BUFFER_SLOT_NUM];
799 req.size = 1UL << buf_req->size;
800 req.count = 1;
801 req.addr = buf_req->addr;
802 req.data = buf_req->data;
803 req.state = STATE_IOREQ_READY;
804 req.dir = buf_req->dir;
805 req.df = 1;
806 req.type = buf_req->type;
807 req.data_is_ptr = 0;
808 qw = (req.size == 8);
809 if (qw) {
810 buf_req = &state->buffered_io_page->buf_ioreq[
811 (state->buffered_io_page->read_pointer + 1) % IOREQ_BUFFER_SLOT_NUM];
812 req.data |= ((uint64_t)buf_req->data) << 32;
815 handle_ioreq(&req);
817 xen_mb();
818 state->buffered_io_page->read_pointer += qw ? 2 : 1;
821 return req.count;
824 static void handle_buffered_io(void *opaque)
826 XenIOState *state = opaque;
828 if (handle_buffered_iopage(state)) {
829 qemu_mod_timer(state->buffered_io_timer,
830 BUFFER_IO_MAX_DELAY + qemu_get_clock_ms(rt_clock));
831 } else {
832 qemu_del_timer(state->buffered_io_timer);
833 xc_evtchn_unmask(state->xce_handle, state->bufioreq_local_port);
837 static void cpu_handle_ioreq(void *opaque)
839 XenIOState *state = opaque;
840 ioreq_t *req = cpu_get_ioreq(state);
842 handle_buffered_iopage(state);
843 if (req) {
844 handle_ioreq(req);
846 if (req->state != STATE_IOREQ_INPROCESS) {
847 fprintf(stderr, "Badness in I/O request ... not in service?!: "
848 "%x, ptr: %x, port: %"PRIx64", "
849 "data: %"PRIx64", count: %" FMT_ioreq_size ", size: %" FMT_ioreq_size "\n",
850 req->state, req->data_is_ptr, req->addr,
851 req->data, req->count, req->size);
852 destroy_hvm_domain(false);
853 return;
856 xen_wmb(); /* Update ioreq contents /then/ update state. */
859 * We do this before we send the response so that the tools
860 * have the opportunity to pick up on the reset before the
861 * guest resumes and does a hlt with interrupts disabled which
862 * causes Xen to powerdown the domain.
864 if (runstate_is_running()) {
865 if (qemu_shutdown_requested_get()) {
866 destroy_hvm_domain(false);
868 if (qemu_reset_requested_get()) {
869 qemu_system_reset(VMRESET_REPORT);
870 destroy_hvm_domain(true);
874 req->state = STATE_IORESP_READY;
875 xc_evtchn_notify(state->xce_handle, state->ioreq_local_port[state->send_vcpu]);
879 static int store_dev_info(int domid, CharDriverState *cs, const char *string)
881 struct xs_handle *xs = NULL;
882 char *path = NULL;
883 char *newpath = NULL;
884 char *pts = NULL;
885 int ret = -1;
887 /* Only continue if we're talking to a pty. */
888 if (strncmp(cs->filename, "pty:", 4)) {
889 return 0;
891 pts = cs->filename + 4;
893 /* We now have everything we need to set the xenstore entry. */
894 xs = xs_open(0);
895 if (xs == NULL) {
896 fprintf(stderr, "Could not contact XenStore\n");
897 goto out;
900 path = xs_get_domain_path(xs, domid);
901 if (path == NULL) {
902 fprintf(stderr, "xs_get_domain_path() error\n");
903 goto out;
905 newpath = realloc(path, (strlen(path) + strlen(string) +
906 strlen("/tty") + 1));
907 if (newpath == NULL) {
908 fprintf(stderr, "realloc error\n");
909 goto out;
911 path = newpath;
913 strcat(path, string);
914 strcat(path, "/tty");
915 if (!xs_write(xs, XBT_NULL, path, pts, strlen(pts))) {
916 fprintf(stderr, "xs_write for '%s' fail", string);
917 goto out;
919 ret = 0;
921 out:
922 free(path);
923 xs_close(xs);
925 return ret;
928 void xenstore_store_pv_console_info(int i, CharDriverState *chr)
930 if (i == 0) {
931 store_dev_info(xen_domid, chr, "/console");
932 } else {
933 char buf[32];
934 snprintf(buf, sizeof(buf), "/device/console/%d", i);
935 store_dev_info(xen_domid, chr, buf);
939 static void xenstore_record_dm_state(struct xs_handle *xs, const char *state)
941 char path[50];
943 if (xs == NULL) {
944 fprintf(stderr, "xenstore connection not initialized\n");
945 exit(1);
948 snprintf(path, sizeof (path), "/local/domain/0/device-model/%u/state", xen_domid);
949 if (!xs_write(xs, XBT_NULL, path, state, strlen(state))) {
950 fprintf(stderr, "error recording dm state\n");
951 exit(1);
955 static void xen_main_loop_prepare(XenIOState *state)
957 int evtchn_fd = -1;
959 if (state->xce_handle != XC_HANDLER_INITIAL_VALUE) {
960 evtchn_fd = xc_evtchn_fd(state->xce_handle);
963 state->buffered_io_timer = qemu_new_timer_ms(rt_clock, handle_buffered_io,
964 state);
966 if (evtchn_fd != -1) {
967 qemu_set_fd_handler(evtchn_fd, cpu_handle_ioreq, NULL, state);
972 /* Initialise Xen */
974 static void xen_change_state_handler(void *opaque, int running,
975 RunState state)
977 if (running) {
978 /* record state running */
979 xenstore_record_dm_state(xenstore, "running");
983 static void xen_hvm_change_state_handler(void *opaque, int running,
984 RunState rstate)
986 XenIOState *xstate = opaque;
987 if (running) {
988 xen_main_loop_prepare(xstate);
992 static void xen_exit_notifier(Notifier *n, void *data)
994 XenIOState *state = container_of(n, XenIOState, exit);
996 xc_evtchn_close(state->xce_handle);
997 xs_daemon_close(state->xenstore);
1000 int xen_init(void)
1002 xen_xc = xen_xc_interface_open(0, 0, 0);
1003 if (xen_xc == XC_HANDLER_INITIAL_VALUE) {
1004 xen_be_printf(NULL, 0, "can't open xen interface\n");
1005 return -1;
1007 qemu_add_vm_change_state_handler(xen_change_state_handler, NULL);
1009 return 0;
1012 static void xen_read_physmap(XenIOState *state)
1014 XenPhysmap *physmap = NULL;
1015 unsigned int len, num, i;
1016 char path[80], *value = NULL;
1017 char **entries = NULL;
1019 snprintf(path, sizeof(path),
1020 "/local/domain/0/device-model/%d/physmap", xen_domid);
1021 entries = xs_directory(state->xenstore, 0, path, &num);
1022 if (entries == NULL)
1023 return;
1025 for (i = 0; i < num; i++) {
1026 physmap = g_malloc(sizeof (XenPhysmap));
1027 physmap->phys_offset = strtoull(entries[i], NULL, 16);
1028 snprintf(path, sizeof(path),
1029 "/local/domain/0/device-model/%d/physmap/%s/start_addr",
1030 xen_domid, entries[i]);
1031 value = xs_read(state->xenstore, 0, path, &len);
1032 if (value == NULL) {
1033 free(physmap);
1034 continue;
1036 physmap->start_addr = strtoull(value, NULL, 16);
1037 free(value);
1039 snprintf(path, sizeof(path),
1040 "/local/domain/0/device-model/%d/physmap/%s/size",
1041 xen_domid, entries[i]);
1042 value = xs_read(state->xenstore, 0, path, &len);
1043 if (value == NULL) {
1044 free(physmap);
1045 continue;
1047 physmap->size = strtoull(value, NULL, 16);
1048 free(value);
1050 snprintf(path, sizeof(path),
1051 "/local/domain/0/device-model/%d/physmap/%s/name",
1052 xen_domid, entries[i]);
1053 physmap->name = xs_read(state->xenstore, 0, path, &len);
1055 QLIST_INSERT_HEAD(&state->physmap, physmap, list);
1057 free(entries);
1060 int xen_hvm_init(void)
1062 int i, rc;
1063 unsigned long ioreq_pfn;
1064 unsigned long bufioreq_evtchn;
1065 XenIOState *state;
1067 state = g_malloc0(sizeof (XenIOState));
1069 state->xce_handle = xen_xc_evtchn_open(NULL, 0);
1070 if (state->xce_handle == XC_HANDLER_INITIAL_VALUE) {
1071 perror("xen: event channel open");
1072 return -errno;
1075 state->xenstore = xs_daemon_open();
1076 if (state->xenstore == NULL) {
1077 perror("xen: xenstore open");
1078 return -errno;
1081 state->exit.notify = xen_exit_notifier;
1082 qemu_add_exit_notifier(&state->exit);
1084 state->suspend.notify = xen_suspend_notifier;
1085 qemu_register_suspend_notifier(&state->suspend);
1087 xc_get_hvm_param(xen_xc, xen_domid, HVM_PARAM_IOREQ_PFN, &ioreq_pfn);
1088 DPRINTF("shared page at pfn %lx\n", ioreq_pfn);
1089 state->shared_page = xc_map_foreign_range(xen_xc, xen_domid, XC_PAGE_SIZE,
1090 PROT_READ|PROT_WRITE, ioreq_pfn);
1091 if (state->shared_page == NULL) {
1092 hw_error("map shared IO page returned error %d handle=" XC_INTERFACE_FMT,
1093 errno, xen_xc);
1096 xc_get_hvm_param(xen_xc, xen_domid, HVM_PARAM_BUFIOREQ_PFN, &ioreq_pfn);
1097 DPRINTF("buffered io page at pfn %lx\n", ioreq_pfn);
1098 state->buffered_io_page = xc_map_foreign_range(xen_xc, xen_domid, XC_PAGE_SIZE,
1099 PROT_READ|PROT_WRITE, ioreq_pfn);
1100 if (state->buffered_io_page == NULL) {
1101 hw_error("map buffered IO page returned error %d", errno);
1104 state->ioreq_local_port = g_malloc0(smp_cpus * sizeof (evtchn_port_t));
1106 /* FIXME: how about if we overflow the page here? */
1107 for (i = 0; i < smp_cpus; i++) {
1108 rc = xc_evtchn_bind_interdomain(state->xce_handle, xen_domid,
1109 xen_vcpu_eport(state->shared_page, i));
1110 if (rc == -1) {
1111 fprintf(stderr, "bind interdomain ioctl error %d\n", errno);
1112 return -1;
1114 state->ioreq_local_port[i] = rc;
1117 rc = xc_get_hvm_param(xen_xc, xen_domid, HVM_PARAM_BUFIOREQ_EVTCHN,
1118 &bufioreq_evtchn);
1119 if (rc < 0) {
1120 fprintf(stderr, "failed to get HVM_PARAM_BUFIOREQ_EVTCHN\n");
1121 return -1;
1123 rc = xc_evtchn_bind_interdomain(state->xce_handle, xen_domid,
1124 (uint32_t)bufioreq_evtchn);
1125 if (rc == -1) {
1126 fprintf(stderr, "bind interdomain ioctl error %d\n", errno);
1127 return -1;
1129 state->bufioreq_local_port = rc;
1131 /* Init RAM management */
1132 xen_map_cache_init(xen_phys_offset_to_gaddr, state);
1133 xen_ram_init(ram_size);
1135 qemu_add_vm_change_state_handler(xen_hvm_change_state_handler, state);
1137 state->memory_listener = xen_memory_listener;
1138 QLIST_INIT(&state->physmap);
1139 memory_listener_register(&state->memory_listener, &address_space_memory);
1140 state->log_for_dirtybit = NULL;
1142 /* Initialize backend core & drivers */
1143 if (xen_be_init() != 0) {
1144 fprintf(stderr, "%s: xen backend core setup failed\n", __FUNCTION__);
1145 exit(1);
1147 xen_be_register("console", &xen_console_ops);
1148 xen_be_register("vkbd", &xen_kbdmouse_ops);
1149 xen_be_register("qdisk", &xen_blkdev_ops);
1150 xen_read_physmap(state);
1152 return 0;
1155 void destroy_hvm_domain(bool reboot)
1157 XenXC xc_handle;
1158 int sts;
1160 xc_handle = xen_xc_interface_open(0, 0, 0);
1161 if (xc_handle == XC_HANDLER_INITIAL_VALUE) {
1162 fprintf(stderr, "Cannot acquire xenctrl handle\n");
1163 } else {
1164 sts = xc_domain_shutdown(xc_handle, xen_domid,
1165 reboot ? SHUTDOWN_reboot : SHUTDOWN_poweroff);
1166 if (sts != 0) {
1167 fprintf(stderr, "xc_domain_shutdown failed to issue %s, "
1168 "sts %d, %s\n", reboot ? "reboot" : "poweroff",
1169 sts, strerror(errno));
1170 } else {
1171 fprintf(stderr, "Issued domain %d %s\n", xen_domid,
1172 reboot ? "reboot" : "poweroff");
1174 xc_interface_close(xc_handle);
1178 void xen_register_framebuffer(MemoryRegion *mr)
1180 framebuffer = mr;
1183 void xen_shutdown_fatal_error(const char *fmt, ...)
1185 va_list ap;
1187 va_start(ap, fmt);
1188 vfprintf(stderr, fmt, ap);
1189 va_end(ap);
1190 fprintf(stderr, "Will destroy the domain.\n");
1191 /* destroy the domain */
1192 qemu_system_shutdown_request();
1195 void xen_modified_memory(ram_addr_t start, ram_addr_t length)
1197 if (unlikely(xen_in_migration)) {
1198 int rc;
1199 ram_addr_t start_pfn, nb_pages;
1201 if (length == 0) {
1202 length = TARGET_PAGE_SIZE;
1204 start_pfn = start >> TARGET_PAGE_BITS;
1205 nb_pages = ((start + length + TARGET_PAGE_SIZE - 1) >> TARGET_PAGE_BITS)
1206 - start_pfn;
1207 rc = xc_hvm_modified_memory(xen_xc, xen_domid, start_pfn, nb_pages);
1208 if (rc) {
1209 fprintf(stderr,
1210 "%s failed for "RAM_ADDR_FMT" ("RAM_ADDR_FMT"): %i, %s\n",
1211 __func__, start, nb_pages, rc, strerror(-rc));