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.
13 #include "hw/xen_common.h"
14 #include "hw/xen_backend.h"
17 #include "xen-mapcache.h"
19 #include "exec-memory.h"
21 #include <xen/hvm/ioreq.h>
22 #include <xen/hvm/params.h>
23 #include <xen/hvm/e820.h>
28 #define DPRINTF(fmt, ...) \
29 do { fprintf(stderr, "xen: " fmt, ## __VA_ARGS__); } while (0)
31 #define DPRINTF(fmt, ...) \
35 static MemoryRegion ram_memory
, ram_640k
, ram_lo
, ram_hi
;
37 /* Compatibility with older version */
38 #if __XEN_LATEST_INTERFACE_VERSION__ < 0x0003020a
39 static inline uint32_t xen_vcpu_eport(shared_iopage_t
*shared_page
, int i
)
41 return shared_page
->vcpu_iodata
[i
].vp_eport
;
43 static inline ioreq_t
*xen_vcpu_ioreq(shared_iopage_t
*shared_page
, int vcpu
)
45 return &shared_page
->vcpu_iodata
[vcpu
].vp_ioreq
;
47 # define FMT_ioreq_size PRIx64
49 static inline uint32_t xen_vcpu_eport(shared_iopage_t
*shared_page
, int i
)
51 return shared_page
->vcpu_ioreq
[i
].vp_eport
;
53 static inline ioreq_t
*xen_vcpu_ioreq(shared_iopage_t
*shared_page
, int vcpu
)
55 return &shared_page
->vcpu_ioreq
[vcpu
];
57 # define FMT_ioreq_size "u"
60 #define BUFFER_IO_MAX_DELAY 100
62 typedef struct XenPhysmap
{
63 target_phys_addr_t start_addr
;
65 target_phys_addr_t phys_offset
;
67 QLIST_ENTRY(XenPhysmap
) list
;
70 typedef struct XenIOState
{
71 shared_iopage_t
*shared_page
;
72 buffered_iopage_t
*buffered_io_page
;
73 QEMUTimer
*buffered_io_timer
;
74 /* the evtchn port for polling the notification, */
75 evtchn_port_t
*ioreq_local_port
;
76 /* the evtchn fd for polling */
78 /* which vcpu we are serving */
81 struct xs_handle
*xenstore
;
82 CPUPhysMemoryClient client
;
83 QLIST_HEAD(, XenPhysmap
) physmap
;
84 const XenPhysmap
*log_for_dirtybit
;
89 /* Xen specific function for piix pci */
91 int xen_pci_slot_get_pirq(PCIDevice
*pci_dev
, int irq_num
)
93 return irq_num
+ ((pci_dev
->devfn
>> 3) << 2);
96 void xen_piix3_set_irq(void *opaque
, int irq_num
, int level
)
98 xc_hvm_set_pci_intx_level(xen_xc
, xen_domid
, 0, 0, irq_num
>> 2,
102 void xen_piix_pci_write_config_client(uint32_t address
, uint32_t val
, int len
)
106 /* Scan for updates to PCI link routes (0x60-0x63). */
107 for (i
= 0; i
< len
; i
++) {
108 uint8_t v
= (val
>> (8 * i
)) & 0xff;
113 if (((address
+ i
) >= 0x60) && ((address
+ i
) <= 0x63)) {
114 xc_hvm_set_pci_link_route(xen_xc
, xen_domid
, address
+ i
- 0x60, v
);
119 void xen_cmos_set_s3_resume(void *opaque
, int irq
, int level
)
121 pc_cmos_set_s3_resume(opaque
, irq
, level
);
123 xc_set_hvm_param(xen_xc
, xen_domid
, HVM_PARAM_ACPI_S_STATE
, 3);
127 /* Xen Interrupt Controller */
129 static void xen_set_irq(void *opaque
, int irq
, int level
)
131 xc_hvm_set_isa_irq_level(xen_xc
, xen_domid
, irq
, level
);
134 qemu_irq
*xen_interrupt_controller_init(void)
136 return qemu_allocate_irqs(xen_set_irq
, NULL
, 16);
141 static void xen_ram_init(ram_addr_t ram_size
)
143 MemoryRegion
*sysmem
= get_system_memory();
144 ram_addr_t below_4g_mem_size
, above_4g_mem_size
= 0;
145 ram_addr_t block_len
;
147 block_len
= ram_size
;
148 if (ram_size
>= HVM_BELOW_4G_RAM_END
) {
149 /* Xen does not allocate the memory continuously, and keep a hole at
150 * HVM_BELOW_4G_MMIO_START of HVM_BELOW_4G_MMIO_LENGTH
152 block_len
+= HVM_BELOW_4G_MMIO_LENGTH
;
154 memory_region_init_ram(&ram_memory
, NULL
, "xen.ram", block_len
);
156 if (ram_size
>= HVM_BELOW_4G_RAM_END
) {
157 above_4g_mem_size
= ram_size
- HVM_BELOW_4G_RAM_END
;
158 below_4g_mem_size
= HVM_BELOW_4G_RAM_END
;
160 below_4g_mem_size
= ram_size
;
163 memory_region_init_alias(&ram_640k
, "xen.ram.640k",
164 &ram_memory
, 0, 0xa0000);
165 memory_region_add_subregion(sysmem
, 0, &ram_640k
);
166 /* Skip of the VGA IO memory space, it will be registered later by the VGA
169 * The area between 0xc0000 and 0x100000 will be used by SeaBIOS to load
170 * the Options ROM, so it is registered here as RAM.
172 memory_region_init_alias(&ram_lo
, "xen.ram.lo",
173 &ram_memory
, 0xc0000, below_4g_mem_size
- 0xc0000);
174 memory_region_add_subregion(sysmem
, 0xc0000, &ram_lo
);
175 if (above_4g_mem_size
> 0) {
176 memory_region_init_alias(&ram_hi
, "xen.ram.hi",
177 &ram_memory
, 0x100000000ULL
,
179 memory_region_add_subregion(sysmem
, 0x100000000ULL
, &ram_hi
);
183 void xen_ram_alloc(ram_addr_t ram_addr
, ram_addr_t size
, MemoryRegion
*mr
)
185 unsigned long nr_pfn
;
189 if (mr
== &ram_memory
) {
193 trace_xen_ram_alloc(ram_addr
, size
);
195 nr_pfn
= size
>> TARGET_PAGE_BITS
;
196 pfn_list
= g_malloc(sizeof (*pfn_list
) * nr_pfn
);
198 for (i
= 0; i
< nr_pfn
; i
++) {
199 pfn_list
[i
] = (ram_addr
>> TARGET_PAGE_BITS
) + i
;
202 if (xc_domain_populate_physmap_exact(xen_xc
, xen_domid
, nr_pfn
, 0, 0, pfn_list
)) {
203 hw_error("xen: failed to populate ram at " RAM_ADDR_FMT
, ram_addr
);
209 static XenPhysmap
*get_physmapping(XenIOState
*state
,
210 target_phys_addr_t start_addr
, ram_addr_t size
)
212 XenPhysmap
*physmap
= NULL
;
214 start_addr
&= TARGET_PAGE_MASK
;
216 QLIST_FOREACH(physmap
, &state
->physmap
, list
) {
217 if (range_covers_byte(physmap
->start_addr
, physmap
->size
, start_addr
)) {
224 #if CONFIG_XEN_CTRL_INTERFACE_VERSION >= 340
225 static int xen_add_to_physmap(XenIOState
*state
,
226 target_phys_addr_t start_addr
,
228 target_phys_addr_t phys_offset
)
232 XenPhysmap
*physmap
= NULL
;
233 target_phys_addr_t pfn
, start_gpfn
;
236 if (get_physmapping(state
, start_addr
, size
)) {
243 /* Xen can only handle a single dirty log region for now and we want
244 * the linear framebuffer to be that region.
245 * Avoid tracking any regions that is not videoram and avoid tracking
246 * the legacy vga region. */
247 QLIST_FOREACH(block
, &ram_list
.blocks
, next
) {
248 if (!strcmp(block
->idstr
, "vga.vram") && block
->offset
== phys_offset
249 && start_addr
> 0xbffff) {
256 DPRINTF("mapping vram to %llx - %llx, from %llx\n",
257 start_addr
, start_addr
+ size
, phys_offset
);
259 pfn
= phys_offset
>> TARGET_PAGE_BITS
;
260 start_gpfn
= start_addr
>> TARGET_PAGE_BITS
;
261 for (i
= 0; i
< size
>> TARGET_PAGE_BITS
; i
++) {
262 unsigned long idx
= pfn
+ i
;
263 xen_pfn_t gpfn
= start_gpfn
+ i
;
265 rc
= xc_domain_add_to_physmap(xen_xc
, xen_domid
, XENMAPSPACE_gmfn
, idx
, gpfn
);
267 DPRINTF("add_to_physmap MFN %"PRI_xen_pfn
" to PFN %"
268 PRI_xen_pfn
" failed: %d\n", idx
, gpfn
, rc
);
273 physmap
= g_malloc(sizeof (XenPhysmap
));
275 physmap
->start_addr
= start_addr
;
276 physmap
->size
= size
;
277 physmap
->phys_offset
= phys_offset
;
279 QLIST_INSERT_HEAD(&state
->physmap
, physmap
, list
);
281 xc_domain_pin_memory_cacheattr(xen_xc
, xen_domid
,
282 start_addr
>> TARGET_PAGE_BITS
,
283 (start_addr
+ size
) >> TARGET_PAGE_BITS
,
284 XEN_DOMCTL_MEM_CACHEATTR_WB
);
288 static int xen_remove_from_physmap(XenIOState
*state
,
289 target_phys_addr_t start_addr
,
294 XenPhysmap
*physmap
= NULL
;
295 target_phys_addr_t phys_offset
= 0;
297 physmap
= get_physmapping(state
, start_addr
, size
);
298 if (physmap
== NULL
) {
302 phys_offset
= physmap
->phys_offset
;
303 size
= physmap
->size
;
305 DPRINTF("unmapping vram to %llx - %llx, from %llx\n",
306 phys_offset
, phys_offset
+ size
, start_addr
);
308 size
>>= TARGET_PAGE_BITS
;
309 start_addr
>>= TARGET_PAGE_BITS
;
310 phys_offset
>>= TARGET_PAGE_BITS
;
311 for (i
= 0; i
< size
; i
++) {
312 unsigned long idx
= start_addr
+ i
;
313 xen_pfn_t gpfn
= phys_offset
+ i
;
315 rc
= xc_domain_add_to_physmap(xen_xc
, xen_domid
, XENMAPSPACE_gmfn
, idx
, gpfn
);
317 fprintf(stderr
, "add_to_physmap MFN %"PRI_xen_pfn
" to PFN %"
318 PRI_xen_pfn
" failed: %d\n", idx
, gpfn
, rc
);
323 QLIST_REMOVE(physmap
, list
);
324 if (state
->log_for_dirtybit
== physmap
) {
325 state
->log_for_dirtybit
= NULL
;
333 static int xen_add_to_physmap(XenIOState
*state
,
334 target_phys_addr_t start_addr
,
336 target_phys_addr_t phys_offset
)
341 static int xen_remove_from_physmap(XenIOState
*state
,
342 target_phys_addr_t start_addr
,
349 static void xen_client_set_memory(struct CPUPhysMemoryClient
*client
,
350 target_phys_addr_t start_addr
,
352 ram_addr_t phys_offset
,
355 XenIOState
*state
= container_of(client
, XenIOState
, client
);
356 ram_addr_t flags
= phys_offset
& ~TARGET_PAGE_MASK
;
357 hvmmem_type_t mem_type
;
359 if (!(start_addr
!= phys_offset
360 && ( (log_dirty
&& flags
< IO_MEM_UNASSIGNED
)
361 || (!log_dirty
&& flags
== IO_MEM_UNASSIGNED
)))) {
365 trace_xen_client_set_memory(start_addr
, size
, phys_offset
, log_dirty
);
367 start_addr
&= TARGET_PAGE_MASK
;
368 size
= TARGET_PAGE_ALIGN(size
);
369 phys_offset
&= TARGET_PAGE_MASK
;
373 xen_add_to_physmap(state
, start_addr
, size
, phys_offset
);
376 mem_type
= HVMMEM_ram_ro
;
377 if (xc_hvm_set_mem_type(xen_xc
, xen_domid
, mem_type
,
378 start_addr
>> TARGET_PAGE_BITS
,
379 size
>> TARGET_PAGE_BITS
)) {
380 DPRINTF("xc_hvm_set_mem_type error, addr: "TARGET_FMT_plx
"\n",
384 case IO_MEM_UNASSIGNED
:
385 if (xen_remove_from_physmap(state
, start_addr
, size
) < 0) {
386 DPRINTF("physmapping does not exist at "TARGET_FMT_plx
"\n", start_addr
);
392 static int xen_sync_dirty_bitmap(XenIOState
*state
,
393 target_phys_addr_t start_addr
,
396 target_phys_addr_t npages
= size
>> TARGET_PAGE_BITS
;
397 target_phys_addr_t vram_offset
= 0;
398 const int width
= sizeof(unsigned long) * 8;
399 unsigned long bitmap
[(npages
+ width
- 1) / width
];
401 const XenPhysmap
*physmap
= NULL
;
403 physmap
= get_physmapping(state
, start_addr
, size
);
404 if (physmap
== NULL
) {
409 if (state
->log_for_dirtybit
== NULL
) {
410 state
->log_for_dirtybit
= physmap
;
411 } else if (state
->log_for_dirtybit
!= physmap
) {
414 vram_offset
= physmap
->phys_offset
;
416 rc
= xc_hvm_track_dirty_vram(xen_xc
, xen_domid
,
417 start_addr
>> TARGET_PAGE_BITS
, npages
,
423 for (i
= 0; i
< ARRAY_SIZE(bitmap
); i
++) {
424 unsigned long map
= bitmap
[i
];
428 cpu_physical_memory_set_dirty(vram_offset
+ (i
* width
+ j
) * TARGET_PAGE_SIZE
);
435 static int xen_log_start(CPUPhysMemoryClient
*client
, target_phys_addr_t phys_addr
, ram_addr_t size
)
437 XenIOState
*state
= container_of(client
, XenIOState
, client
);
439 return xen_sync_dirty_bitmap(state
, phys_addr
, size
);
442 static int xen_log_stop(CPUPhysMemoryClient
*client
, target_phys_addr_t phys_addr
, ram_addr_t size
)
444 XenIOState
*state
= container_of(client
, XenIOState
, client
);
446 state
->log_for_dirtybit
= NULL
;
447 /* Disable dirty bit tracking */
448 return xc_hvm_track_dirty_vram(xen_xc
, xen_domid
, 0, 0, NULL
);
451 static int xen_client_sync_dirty_bitmap(struct CPUPhysMemoryClient
*client
,
452 target_phys_addr_t start_addr
,
453 target_phys_addr_t end_addr
)
455 XenIOState
*state
= container_of(client
, XenIOState
, client
);
457 return xen_sync_dirty_bitmap(state
, start_addr
, end_addr
- start_addr
);
460 static int xen_client_migration_log(struct CPUPhysMemoryClient
*client
,
466 static CPUPhysMemoryClient xen_cpu_phys_memory_client
= {
467 .set_memory
= xen_client_set_memory
,
468 .sync_dirty_bitmap
= xen_client_sync_dirty_bitmap
,
469 .migration_log
= xen_client_migration_log
,
470 .log_start
= xen_log_start
,
471 .log_stop
= xen_log_stop
,
474 /* VCPU Operations, MMIO, IO ring ... */
476 static void xen_reset_vcpu(void *opaque
)
478 CPUState
*env
= opaque
;
483 void xen_vcpu_init(void)
487 if ((first_cpu
= qemu_get_cpu(0))) {
488 qemu_register_reset(xen_reset_vcpu
, first_cpu
);
489 xen_reset_vcpu(first_cpu
);
493 /* get the ioreq packets from share mem */
494 static ioreq_t
*cpu_get_ioreq_from_shared_memory(XenIOState
*state
, int vcpu
)
496 ioreq_t
*req
= xen_vcpu_ioreq(state
->shared_page
, vcpu
);
498 if (req
->state
!= STATE_IOREQ_READY
) {
499 DPRINTF("I/O request not ready: "
500 "%x, ptr: %x, port: %"PRIx64
", "
501 "data: %"PRIx64
", count: %" FMT_ioreq_size
", size: %" FMT_ioreq_size
"\n",
502 req
->state
, req
->data_is_ptr
, req
->addr
,
503 req
->data
, req
->count
, req
->size
);
507 xen_rmb(); /* see IOREQ_READY /then/ read contents of ioreq */
509 req
->state
= STATE_IOREQ_INPROCESS
;
513 /* use poll to get the port notification */
514 /* ioreq_vec--out,the */
515 /* retval--the number of ioreq packet */
516 static ioreq_t
*cpu_get_ioreq(XenIOState
*state
)
521 port
= xc_evtchn_pending(state
->xce_handle
);
523 for (i
= 0; i
< smp_cpus
; i
++) {
524 if (state
->ioreq_local_port
[i
] == port
) {
530 hw_error("Fatal error while trying to get io event!\n");
533 /* unmask the wanted port again */
534 xc_evtchn_unmask(state
->xce_handle
, port
);
536 /* get the io packet from shared memory */
537 state
->send_vcpu
= i
;
538 return cpu_get_ioreq_from_shared_memory(state
, i
);
541 /* read error or read nothing */
545 static uint32_t do_inp(pio_addr_t addr
, unsigned long size
)
549 return cpu_inb(addr
);
551 return cpu_inw(addr
);
553 return cpu_inl(addr
);
555 hw_error("inp: bad size: %04"FMT_pioaddr
" %lx", addr
, size
);
559 static void do_outp(pio_addr_t addr
,
560 unsigned long size
, uint32_t val
)
564 return cpu_outb(addr
, val
);
566 return cpu_outw(addr
, val
);
568 return cpu_outl(addr
, val
);
570 hw_error("outp: bad size: %04"FMT_pioaddr
" %lx", addr
, size
);
574 static void cpu_ioreq_pio(ioreq_t
*req
)
578 sign
= req
->df
? -1 : 1;
580 if (req
->dir
== IOREQ_READ
) {
581 if (!req
->data_is_ptr
) {
582 req
->data
= do_inp(req
->addr
, req
->size
);
586 for (i
= 0; i
< req
->count
; i
++) {
587 tmp
= do_inp(req
->addr
, req
->size
);
588 cpu_physical_memory_write(req
->data
+ (sign
* i
* req
->size
),
589 (uint8_t *) &tmp
, req
->size
);
592 } else if (req
->dir
== IOREQ_WRITE
) {
593 if (!req
->data_is_ptr
) {
594 do_outp(req
->addr
, req
->size
, req
->data
);
596 for (i
= 0; i
< req
->count
; i
++) {
599 cpu_physical_memory_read(req
->data
+ (sign
* i
* req
->size
),
600 (uint8_t*) &tmp
, req
->size
);
601 do_outp(req
->addr
, req
->size
, tmp
);
607 static void cpu_ioreq_move(ioreq_t
*req
)
611 sign
= req
->df
? -1 : 1;
613 if (!req
->data_is_ptr
) {
614 if (req
->dir
== IOREQ_READ
) {
615 for (i
= 0; i
< req
->count
; i
++) {
616 cpu_physical_memory_read(req
->addr
+ (sign
* i
* req
->size
),
617 (uint8_t *) &req
->data
, req
->size
);
619 } else if (req
->dir
== IOREQ_WRITE
) {
620 for (i
= 0; i
< req
->count
; i
++) {
621 cpu_physical_memory_write(req
->addr
+ (sign
* i
* req
->size
),
622 (uint8_t *) &req
->data
, req
->size
);
628 if (req
->dir
== IOREQ_READ
) {
629 for (i
= 0; i
< req
->count
; i
++) {
630 cpu_physical_memory_read(req
->addr
+ (sign
* i
* req
->size
),
631 (uint8_t*) &tmp
, req
->size
);
632 cpu_physical_memory_write(req
->data
+ (sign
* i
* req
->size
),
633 (uint8_t*) &tmp
, req
->size
);
635 } else if (req
->dir
== IOREQ_WRITE
) {
636 for (i
= 0; i
< req
->count
; i
++) {
637 cpu_physical_memory_read(req
->data
+ (sign
* i
* req
->size
),
638 (uint8_t*) &tmp
, req
->size
);
639 cpu_physical_memory_write(req
->addr
+ (sign
* i
* req
->size
),
640 (uint8_t*) &tmp
, req
->size
);
646 static void handle_ioreq(ioreq_t
*req
)
648 if (!req
->data_is_ptr
&& (req
->dir
== IOREQ_WRITE
) &&
649 (req
->size
< sizeof (target_ulong
))) {
650 req
->data
&= ((target_ulong
) 1 << (8 * req
->size
)) - 1;
657 case IOREQ_TYPE_COPY
:
660 case IOREQ_TYPE_TIMEOFFSET
:
662 case IOREQ_TYPE_INVALIDATE
:
663 xen_invalidate_map_cache();
666 hw_error("Invalid ioreq type 0x%x\n", req
->type
);
670 static void handle_buffered_iopage(XenIOState
*state
)
672 buf_ioreq_t
*buf_req
= NULL
;
676 if (!state
->buffered_io_page
) {
680 while (state
->buffered_io_page
->read_pointer
!= state
->buffered_io_page
->write_pointer
) {
681 buf_req
= &state
->buffered_io_page
->buf_ioreq
[
682 state
->buffered_io_page
->read_pointer
% IOREQ_BUFFER_SLOT_NUM
];
683 req
.size
= 1UL << buf_req
->size
;
685 req
.addr
= buf_req
->addr
;
686 req
.data
= buf_req
->data
;
687 req
.state
= STATE_IOREQ_READY
;
688 req
.dir
= buf_req
->dir
;
690 req
.type
= buf_req
->type
;
692 qw
= (req
.size
== 8);
694 buf_req
= &state
->buffered_io_page
->buf_ioreq
[
695 (state
->buffered_io_page
->read_pointer
+ 1) % IOREQ_BUFFER_SLOT_NUM
];
696 req
.data
|= ((uint64_t)buf_req
->data
) << 32;
702 state
->buffered_io_page
->read_pointer
+= qw
? 2 : 1;
706 static void handle_buffered_io(void *opaque
)
708 XenIOState
*state
= opaque
;
710 handle_buffered_iopage(state
);
711 qemu_mod_timer(state
->buffered_io_timer
,
712 BUFFER_IO_MAX_DELAY
+ qemu_get_clock_ms(rt_clock
));
715 static void cpu_handle_ioreq(void *opaque
)
717 XenIOState
*state
= opaque
;
718 ioreq_t
*req
= cpu_get_ioreq(state
);
720 handle_buffered_iopage(state
);
724 if (req
->state
!= STATE_IOREQ_INPROCESS
) {
725 fprintf(stderr
, "Badness in I/O request ... not in service?!: "
726 "%x, ptr: %x, port: %"PRIx64
", "
727 "data: %"PRIx64
", count: %" FMT_ioreq_size
", size: %" FMT_ioreq_size
"\n",
728 req
->state
, req
->data_is_ptr
, req
->addr
,
729 req
->data
, req
->count
, req
->size
);
730 destroy_hvm_domain();
734 xen_wmb(); /* Update ioreq contents /then/ update state. */
737 * We do this before we send the response so that the tools
738 * have the opportunity to pick up on the reset before the
739 * guest resumes and does a hlt with interrupts disabled which
740 * causes Xen to powerdown the domain.
742 if (runstate_is_running()) {
743 if (qemu_shutdown_requested_get()) {
744 destroy_hvm_domain();
746 if (qemu_reset_requested_get()) {
747 qemu_system_reset(VMRESET_REPORT
);
751 req
->state
= STATE_IORESP_READY
;
752 xc_evtchn_notify(state
->xce_handle
, state
->ioreq_local_port
[state
->send_vcpu
]);
756 static int store_dev_info(int domid
, CharDriverState
*cs
, const char *string
)
758 struct xs_handle
*xs
= NULL
;
760 char *newpath
= NULL
;
764 /* Only continue if we're talking to a pty. */
765 if (strncmp(cs
->filename
, "pty:", 4)) {
768 pts
= cs
->filename
+ 4;
770 /* We now have everything we need to set the xenstore entry. */
773 fprintf(stderr
, "Could not contact XenStore\n");
777 path
= xs_get_domain_path(xs
, domid
);
779 fprintf(stderr
, "xs_get_domain_path() error\n");
782 newpath
= realloc(path
, (strlen(path
) + strlen(string
) +
783 strlen("/tty") + 1));
784 if (newpath
== NULL
) {
785 fprintf(stderr
, "realloc error\n");
790 strcat(path
, string
);
791 strcat(path
, "/tty");
792 if (!xs_write(xs
, XBT_NULL
, path
, pts
, strlen(pts
))) {
793 fprintf(stderr
, "xs_write for '%s' fail", string
);
805 void xenstore_store_pv_console_info(int i
, CharDriverState
*chr
)
808 store_dev_info(xen_domid
, chr
, "/console");
811 snprintf(buf
, sizeof(buf
), "/device/console/%d", i
);
812 store_dev_info(xen_domid
, chr
, buf
);
816 static void xenstore_record_dm_state(struct xs_handle
*xs
, const char *state
)
821 fprintf(stderr
, "xenstore connection not initialized\n");
825 snprintf(path
, sizeof (path
), "/local/domain/0/device-model/%u/state", xen_domid
);
826 if (!xs_write(xs
, XBT_NULL
, path
, state
, strlen(state
))) {
827 fprintf(stderr
, "error recording dm state\n");
832 static void xen_main_loop_prepare(XenIOState
*state
)
836 if (state
->xce_handle
!= XC_HANDLER_INITIAL_VALUE
) {
837 evtchn_fd
= xc_evtchn_fd(state
->xce_handle
);
840 state
->buffered_io_timer
= qemu_new_timer_ms(rt_clock
, handle_buffered_io
,
842 qemu_mod_timer(state
->buffered_io_timer
, qemu_get_clock_ms(rt_clock
));
844 if (evtchn_fd
!= -1) {
845 qemu_set_fd_handler(evtchn_fd
, cpu_handle_ioreq
, NULL
, state
);
852 static void xen_change_state_handler(void *opaque
, int running
,
856 /* record state running */
857 xenstore_record_dm_state(xenstore
, "running");
861 static void xen_hvm_change_state_handler(void *opaque
, int running
,
864 XenIOState
*xstate
= opaque
;
866 xen_main_loop_prepare(xstate
);
870 static void xen_exit_notifier(Notifier
*n
, void *data
)
872 XenIOState
*state
= container_of(n
, XenIOState
, exit
);
874 xc_evtchn_close(state
->xce_handle
);
875 xs_daemon_close(state
->xenstore
);
880 xen_xc
= xen_xc_interface_open(0, 0, 0);
881 if (xen_xc
== XC_HANDLER_INITIAL_VALUE
) {
882 xen_be_printf(NULL
, 0, "can't open xen interface\n");
885 qemu_add_vm_change_state_handler(xen_change_state_handler
, NULL
);
890 int xen_hvm_init(void)
893 unsigned long ioreq_pfn
;
896 state
= g_malloc0(sizeof (XenIOState
));
898 state
->xce_handle
= xen_xc_evtchn_open(NULL
, 0);
899 if (state
->xce_handle
== XC_HANDLER_INITIAL_VALUE
) {
900 perror("xen: event channel open");
904 state
->xenstore
= xs_daemon_open();
905 if (state
->xenstore
== NULL
) {
906 perror("xen: xenstore open");
910 state
->exit
.notify
= xen_exit_notifier
;
911 qemu_add_exit_notifier(&state
->exit
);
913 xc_get_hvm_param(xen_xc
, xen_domid
, HVM_PARAM_IOREQ_PFN
, &ioreq_pfn
);
914 DPRINTF("shared page at pfn %lx\n", ioreq_pfn
);
915 state
->shared_page
= xc_map_foreign_range(xen_xc
, xen_domid
, XC_PAGE_SIZE
,
916 PROT_READ
|PROT_WRITE
, ioreq_pfn
);
917 if (state
->shared_page
== NULL
) {
918 hw_error("map shared IO page returned error %d handle=" XC_INTERFACE_FMT
,
922 xc_get_hvm_param(xen_xc
, xen_domid
, HVM_PARAM_BUFIOREQ_PFN
, &ioreq_pfn
);
923 DPRINTF("buffered io page at pfn %lx\n", ioreq_pfn
);
924 state
->buffered_io_page
= xc_map_foreign_range(xen_xc
, xen_domid
, XC_PAGE_SIZE
,
925 PROT_READ
|PROT_WRITE
, ioreq_pfn
);
926 if (state
->buffered_io_page
== NULL
) {
927 hw_error("map buffered IO page returned error %d", errno
);
930 state
->ioreq_local_port
= g_malloc0(smp_cpus
* sizeof (evtchn_port_t
));
932 /* FIXME: how about if we overflow the page here? */
933 for (i
= 0; i
< smp_cpus
; i
++) {
934 rc
= xc_evtchn_bind_interdomain(state
->xce_handle
, xen_domid
,
935 xen_vcpu_eport(state
->shared_page
, i
));
937 fprintf(stderr
, "bind interdomain ioctl error %d\n", errno
);
940 state
->ioreq_local_port
[i
] = rc
;
943 /* Init RAM management */
944 xen_map_cache_init();
945 xen_ram_init(ram_size
);
947 qemu_add_vm_change_state_handler(xen_hvm_change_state_handler
, state
);
949 state
->client
= xen_cpu_phys_memory_client
;
950 QLIST_INIT(&state
->physmap
);
951 cpu_register_phys_memory_client(&state
->client
);
952 state
->log_for_dirtybit
= NULL
;
954 /* Initialize backend core & drivers */
955 if (xen_be_init() != 0) {
956 fprintf(stderr
, "%s: xen backend core setup failed\n", __FUNCTION__
);
959 xen_be_register("console", &xen_console_ops
);
960 xen_be_register("vkbd", &xen_kbdmouse_ops
);
961 xen_be_register("qdisk", &xen_blkdev_ops
);
966 void destroy_hvm_domain(void)
971 xc_handle
= xen_xc_interface_open(0, 0, 0);
972 if (xc_handle
== XC_HANDLER_INITIAL_VALUE
) {
973 fprintf(stderr
, "Cannot acquire xenctrl handle\n");
975 sts
= xc_domain_shutdown(xc_handle
, xen_domid
, SHUTDOWN_poweroff
);
977 fprintf(stderr
, "? xc_domain_shutdown failed to issue poweroff, "
978 "sts %d, %s\n", sts
, strerror(errno
));
980 fprintf(stderr
, "Issued domain %d poweroff\n", xen_domid
);
982 xc_interface_close(xc_handle
);