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.
15 #include "hw/xen_common.h"
16 #include "hw/xen_backend.h"
19 #include "xen-mapcache.h"
21 #include "exec-memory.h"
23 #include <xen/hvm/ioreq.h>
24 #include <xen/hvm/params.h>
25 #include <xen/hvm/e820.h>
30 #define DPRINTF(fmt, ...) \
31 do { fprintf(stderr, "xen: " fmt, ## __VA_ARGS__); } while (0)
33 #define DPRINTF(fmt, ...) \
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
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"
63 #define BUFFER_IO_MAX_DELAY 100
65 typedef struct XenPhysmap
{
66 target_phys_addr_t start_addr
;
69 target_phys_addr_t phys_offset
;
71 QLIST_ENTRY(XenPhysmap
) list
;
74 typedef struct XenIOState
{
75 shared_iopage_t
*shared_page
;
76 buffered_iopage_t
*buffered_io_page
;
77 QEMUTimer
*buffered_io_timer
;
78 /* the evtchn port for polling the notification, */
79 evtchn_port_t
*ioreq_local_port
;
80 /* the evtchn fd for polling */
82 /* which vcpu we are serving */
85 struct xs_handle
*xenstore
;
86 MemoryListener memory_listener
;
87 QLIST_HEAD(, XenPhysmap
) physmap
;
88 target_phys_addr_t free_phys_offset
;
89 const XenPhysmap
*log_for_dirtybit
;
95 /* Xen specific function for piix pci */
97 int xen_pci_slot_get_pirq(PCIDevice
*pci_dev
, int irq_num
)
99 return irq_num
+ ((pci_dev
->devfn
>> 3) << 2);
102 void xen_piix3_set_irq(void *opaque
, int irq_num
, int level
)
104 xc_hvm_set_pci_intx_level(xen_xc
, xen_domid
, 0, 0, irq_num
>> 2,
108 void xen_piix_pci_write_config_client(uint32_t address
, uint32_t val
, int len
)
112 /* Scan for updates to PCI link routes (0x60-0x63). */
113 for (i
= 0; i
< len
; i
++) {
114 uint8_t v
= (val
>> (8 * i
)) & 0xff;
119 if (((address
+ i
) >= 0x60) && ((address
+ i
) <= 0x63)) {
120 xc_hvm_set_pci_link_route(xen_xc
, xen_domid
, address
+ i
- 0x60, v
);
125 static void xen_suspend_notifier(Notifier
*notifier
, void *data
)
127 xc_set_hvm_param(xen_xc
, xen_domid
, HVM_PARAM_ACPI_S_STATE
, 3);
130 /* Xen Interrupt Controller */
132 static void xen_set_irq(void *opaque
, int irq
, int level
)
134 xc_hvm_set_isa_irq_level(xen_xc
, xen_domid
, irq
, level
);
137 qemu_irq
*xen_interrupt_controller_init(void)
139 return qemu_allocate_irqs(xen_set_irq
, NULL
, 16);
144 static void xen_ram_init(ram_addr_t ram_size
)
146 MemoryRegion
*sysmem
= get_system_memory();
147 ram_addr_t below_4g_mem_size
, above_4g_mem_size
= 0;
148 ram_addr_t block_len
;
150 block_len
= ram_size
;
151 if (ram_size
>= HVM_BELOW_4G_RAM_END
) {
152 /* Xen does not allocate the memory continuously, and keep a hole at
153 * HVM_BELOW_4G_MMIO_START of HVM_BELOW_4G_MMIO_LENGTH
155 block_len
+= HVM_BELOW_4G_MMIO_LENGTH
;
157 memory_region_init_ram(&ram_memory
, "xen.ram", block_len
);
158 vmstate_register_ram_global(&ram_memory
);
160 if (ram_size
>= HVM_BELOW_4G_RAM_END
) {
161 above_4g_mem_size
= ram_size
- HVM_BELOW_4G_RAM_END
;
162 below_4g_mem_size
= HVM_BELOW_4G_RAM_END
;
164 below_4g_mem_size
= ram_size
;
167 memory_region_init_alias(&ram_640k
, "xen.ram.640k",
168 &ram_memory
, 0, 0xa0000);
169 memory_region_add_subregion(sysmem
, 0, &ram_640k
);
170 /* Skip of the VGA IO memory space, it will be registered later by the VGA
173 * The area between 0xc0000 and 0x100000 will be used by SeaBIOS to load
174 * the Options ROM, so it is registered here as RAM.
176 memory_region_init_alias(&ram_lo
, "xen.ram.lo",
177 &ram_memory
, 0xc0000, below_4g_mem_size
- 0xc0000);
178 memory_region_add_subregion(sysmem
, 0xc0000, &ram_lo
);
179 if (above_4g_mem_size
> 0) {
180 memory_region_init_alias(&ram_hi
, "xen.ram.hi",
181 &ram_memory
, 0x100000000ULL
,
183 memory_region_add_subregion(sysmem
, 0x100000000ULL
, &ram_hi
);
187 void xen_ram_alloc(ram_addr_t ram_addr
, ram_addr_t size
, MemoryRegion
*mr
)
189 unsigned long nr_pfn
;
193 if (mr
== &ram_memory
) {
197 trace_xen_ram_alloc(ram_addr
, size
);
199 nr_pfn
= size
>> TARGET_PAGE_BITS
;
200 pfn_list
= g_malloc(sizeof (*pfn_list
) * nr_pfn
);
202 for (i
= 0; i
< nr_pfn
; i
++) {
203 pfn_list
[i
] = (ram_addr
>> TARGET_PAGE_BITS
) + i
;
206 if (xc_domain_populate_physmap_exact(xen_xc
, xen_domid
, nr_pfn
, 0, 0, pfn_list
)) {
207 hw_error("xen: failed to populate ram at " RAM_ADDR_FMT
, ram_addr
);
213 static XenPhysmap
*get_physmapping(XenIOState
*state
,
214 target_phys_addr_t start_addr
, ram_addr_t size
)
216 XenPhysmap
*physmap
= NULL
;
218 start_addr
&= TARGET_PAGE_MASK
;
220 QLIST_FOREACH(physmap
, &state
->physmap
, list
) {
221 if (range_covers_byte(physmap
->start_addr
, physmap
->size
, start_addr
)) {
228 #if CONFIG_XEN_CTRL_INTERFACE_VERSION >= 340
229 static int xen_add_to_physmap(XenIOState
*state
,
230 target_phys_addr_t start_addr
,
233 target_phys_addr_t offset_within_region
)
237 XenPhysmap
*physmap
= NULL
;
238 target_phys_addr_t pfn
, start_gpfn
;
239 target_phys_addr_t phys_offset
= memory_region_get_ram_addr(mr
);
240 char path
[80], value
[17];
242 if (get_physmapping(state
, start_addr
, size
)) {
249 /* Xen can only handle a single dirty log region for now and we want
250 * the linear framebuffer to be that region.
251 * Avoid tracking any regions that is not videoram and avoid tracking
252 * the legacy vga region. */
253 if (mr
== framebuffer
&& start_addr
> 0xbffff) {
259 DPRINTF("mapping vram to %llx - %llx\n", start_addr
, start_addr
+ size
);
261 pfn
= phys_offset
>> TARGET_PAGE_BITS
;
262 start_gpfn
= start_addr
>> TARGET_PAGE_BITS
;
263 for (i
= 0; i
< size
>> TARGET_PAGE_BITS
; i
++) {
264 unsigned long idx
= pfn
+ i
;
265 xen_pfn_t gpfn
= start_gpfn
+ i
;
267 rc
= xc_domain_add_to_physmap(xen_xc
, xen_domid
, XENMAPSPACE_gmfn
, idx
, gpfn
);
269 DPRINTF("add_to_physmap MFN %"PRI_xen_pfn
" to PFN %"
270 PRI_xen_pfn
" failed: %d\n", idx
, gpfn
, rc
);
275 physmap
= g_malloc(sizeof (XenPhysmap
));
277 physmap
->start_addr
= start_addr
;
278 physmap
->size
= size
;
279 physmap
->name
= (char *)mr
->name
;
280 physmap
->phys_offset
= phys_offset
;
282 QLIST_INSERT_HEAD(&state
->physmap
, physmap
, list
);
284 xc_domain_pin_memory_cacheattr(xen_xc
, xen_domid
,
285 start_addr
>> TARGET_PAGE_BITS
,
286 (start_addr
+ size
) >> TARGET_PAGE_BITS
,
287 XEN_DOMCTL_MEM_CACHEATTR_WB
);
289 snprintf(path
, sizeof(path
),
290 "/local/domain/0/device-model/%d/physmap/%"PRIx64
"/start_addr",
291 xen_domid
, (uint64_t)phys_offset
);
292 snprintf(value
, sizeof(value
), "%"PRIx64
, (uint64_t)start_addr
);
293 if (!xs_write(state
->xenstore
, 0, path
, value
, strlen(value
))) {
296 snprintf(path
, sizeof(path
),
297 "/local/domain/0/device-model/%d/physmap/%"PRIx64
"/size",
298 xen_domid
, (uint64_t)phys_offset
);
299 snprintf(value
, sizeof(value
), "%"PRIx64
, (uint64_t)size
);
300 if (!xs_write(state
->xenstore
, 0, path
, value
, strlen(value
))) {
304 snprintf(path
, sizeof(path
),
305 "/local/domain/0/device-model/%d/physmap/%"PRIx64
"/name",
306 xen_domid
, (uint64_t)phys_offset
);
307 if (!xs_write(state
->xenstore
, 0, path
, mr
->name
, strlen(mr
->name
))) {
315 static int xen_remove_from_physmap(XenIOState
*state
,
316 target_phys_addr_t start_addr
,
321 XenPhysmap
*physmap
= NULL
;
322 target_phys_addr_t phys_offset
= 0;
324 physmap
= get_physmapping(state
, start_addr
, size
);
325 if (physmap
== NULL
) {
329 phys_offset
= physmap
->phys_offset
;
330 size
= physmap
->size
;
332 DPRINTF("unmapping vram to %llx - %llx, from %llx\n",
333 phys_offset
, phys_offset
+ size
, start_addr
);
335 size
>>= TARGET_PAGE_BITS
;
336 start_addr
>>= TARGET_PAGE_BITS
;
337 phys_offset
>>= TARGET_PAGE_BITS
;
338 for (i
= 0; i
< size
; i
++) {
339 unsigned long idx
= start_addr
+ i
;
340 xen_pfn_t gpfn
= phys_offset
+ i
;
342 rc
= xc_domain_add_to_physmap(xen_xc
, xen_domid
, XENMAPSPACE_gmfn
, idx
, gpfn
);
344 fprintf(stderr
, "add_to_physmap MFN %"PRI_xen_pfn
" to PFN %"
345 PRI_xen_pfn
" failed: %d\n", idx
, gpfn
, rc
);
350 QLIST_REMOVE(physmap
, list
);
351 if (state
->log_for_dirtybit
== physmap
) {
352 state
->log_for_dirtybit
= NULL
;
360 static int xen_add_to_physmap(XenIOState
*state
,
361 target_phys_addr_t start_addr
,
364 target_phys_addr_t offset_within_region
)
369 static int xen_remove_from_physmap(XenIOState
*state
,
370 target_phys_addr_t start_addr
,
377 static void xen_set_memory(struct MemoryListener
*listener
,
378 MemoryRegionSection
*section
,
381 XenIOState
*state
= container_of(listener
, XenIOState
, memory_listener
);
382 target_phys_addr_t start_addr
= section
->offset_within_address_space
;
383 ram_addr_t size
= section
->size
;
384 bool log_dirty
= memory_region_is_logging(section
->mr
);
385 hvmmem_type_t mem_type
;
387 if (!memory_region_is_ram(section
->mr
)) {
391 if (!(section
->mr
!= &ram_memory
392 && ( (log_dirty
&& add
) || (!log_dirty
&& !add
)))) {
396 trace_xen_client_set_memory(start_addr
, size
, log_dirty
);
398 start_addr
&= TARGET_PAGE_MASK
;
399 size
= TARGET_PAGE_ALIGN(size
);
402 if (!memory_region_is_rom(section
->mr
)) {
403 xen_add_to_physmap(state
, start_addr
, size
,
404 section
->mr
, section
->offset_within_region
);
406 mem_type
= HVMMEM_ram_ro
;
407 if (xc_hvm_set_mem_type(xen_xc
, xen_domid
, mem_type
,
408 start_addr
>> TARGET_PAGE_BITS
,
409 size
>> TARGET_PAGE_BITS
)) {
410 DPRINTF("xc_hvm_set_mem_type error, addr: "TARGET_FMT_plx
"\n",
415 if (xen_remove_from_physmap(state
, start_addr
, size
) < 0) {
416 DPRINTF("physmapping does not exist at "TARGET_FMT_plx
"\n", start_addr
);
421 static void xen_region_add(MemoryListener
*listener
,
422 MemoryRegionSection
*section
)
424 xen_set_memory(listener
, section
, true);
427 static void xen_region_del(MemoryListener
*listener
,
428 MemoryRegionSection
*section
)
430 xen_set_memory(listener
, section
, false);
433 static void xen_sync_dirty_bitmap(XenIOState
*state
,
434 target_phys_addr_t start_addr
,
437 target_phys_addr_t npages
= size
>> TARGET_PAGE_BITS
;
438 const int width
= sizeof(unsigned long) * 8;
439 unsigned long bitmap
[(npages
+ width
- 1) / width
];
441 const XenPhysmap
*physmap
= NULL
;
443 physmap
= get_physmapping(state
, start_addr
, size
);
444 if (physmap
== NULL
) {
449 if (state
->log_for_dirtybit
== NULL
) {
450 state
->log_for_dirtybit
= physmap
;
451 } else if (state
->log_for_dirtybit
!= physmap
) {
452 /* Only one range for dirty bitmap can be tracked. */
456 rc
= xc_hvm_track_dirty_vram(xen_xc
, xen_domid
,
457 start_addr
>> TARGET_PAGE_BITS
, npages
,
460 if (rc
!= -ENODATA
) {
461 fprintf(stderr
, "xen: track_dirty_vram failed (0x" TARGET_FMT_plx
462 ", 0x" TARGET_FMT_plx
"): %s\n",
463 start_addr
, start_addr
+ size
, strerror(-rc
));
468 for (i
= 0; i
< ARRAY_SIZE(bitmap
); i
++) {
469 unsigned long map
= bitmap
[i
];
473 memory_region_set_dirty(framebuffer
,
474 (i
* width
+ j
) * TARGET_PAGE_SIZE
,
480 static void xen_log_start(MemoryListener
*listener
,
481 MemoryRegionSection
*section
)
483 XenIOState
*state
= container_of(listener
, XenIOState
, memory_listener
);
485 xen_sync_dirty_bitmap(state
, section
->offset_within_address_space
,
489 static void xen_log_stop(MemoryListener
*listener
, MemoryRegionSection
*section
)
491 XenIOState
*state
= container_of(listener
, XenIOState
, memory_listener
);
493 state
->log_for_dirtybit
= NULL
;
494 /* Disable dirty bit tracking */
495 xc_hvm_track_dirty_vram(xen_xc
, xen_domid
, 0, 0, NULL
);
498 static void xen_log_sync(MemoryListener
*listener
, MemoryRegionSection
*section
)
500 XenIOState
*state
= container_of(listener
, XenIOState
, memory_listener
);
502 xen_sync_dirty_bitmap(state
, section
->offset_within_address_space
,
506 static void xen_log_global_start(MemoryListener
*listener
)
510 static void xen_log_global_stop(MemoryListener
*listener
)
514 static MemoryListener xen_memory_listener
= {
515 .region_add
= xen_region_add
,
516 .region_del
= xen_region_del
,
517 .log_start
= xen_log_start
,
518 .log_stop
= xen_log_stop
,
519 .log_sync
= xen_log_sync
,
520 .log_global_start
= xen_log_global_start
,
521 .log_global_stop
= xen_log_global_stop
,
524 /* VCPU Operations, MMIO, IO ring ... */
526 static void xen_reset_vcpu(void *opaque
)
528 CPUState
*env
= opaque
;
533 void xen_vcpu_init(void)
537 if ((first_cpu
= qemu_get_cpu(0))) {
538 qemu_register_reset(xen_reset_vcpu
, first_cpu
);
539 xen_reset_vcpu(first_cpu
);
543 /* get the ioreq packets from share mem */
544 static ioreq_t
*cpu_get_ioreq_from_shared_memory(XenIOState
*state
, int vcpu
)
546 ioreq_t
*req
= xen_vcpu_ioreq(state
->shared_page
, vcpu
);
548 if (req
->state
!= STATE_IOREQ_READY
) {
549 DPRINTF("I/O request not ready: "
550 "%x, ptr: %x, port: %"PRIx64
", "
551 "data: %"PRIx64
", count: %" FMT_ioreq_size
", size: %" FMT_ioreq_size
"\n",
552 req
->state
, req
->data_is_ptr
, req
->addr
,
553 req
->data
, req
->count
, req
->size
);
557 xen_rmb(); /* see IOREQ_READY /then/ read contents of ioreq */
559 req
->state
= STATE_IOREQ_INPROCESS
;
563 /* use poll to get the port notification */
564 /* ioreq_vec--out,the */
565 /* retval--the number of ioreq packet */
566 static ioreq_t
*cpu_get_ioreq(XenIOState
*state
)
571 port
= xc_evtchn_pending(state
->xce_handle
);
573 for (i
= 0; i
< smp_cpus
; i
++) {
574 if (state
->ioreq_local_port
[i
] == port
) {
580 hw_error("Fatal error while trying to get io event!\n");
583 /* unmask the wanted port again */
584 xc_evtchn_unmask(state
->xce_handle
, port
);
586 /* get the io packet from shared memory */
587 state
->send_vcpu
= i
;
588 return cpu_get_ioreq_from_shared_memory(state
, i
);
591 /* read error or read nothing */
595 static uint32_t do_inp(pio_addr_t addr
, unsigned long size
)
599 return cpu_inb(addr
);
601 return cpu_inw(addr
);
603 return cpu_inl(addr
);
605 hw_error("inp: bad size: %04"FMT_pioaddr
" %lx", addr
, size
);
609 static void do_outp(pio_addr_t addr
,
610 unsigned long size
, uint32_t val
)
614 return cpu_outb(addr
, val
);
616 return cpu_outw(addr
, val
);
618 return cpu_outl(addr
, val
);
620 hw_error("outp: bad size: %04"FMT_pioaddr
" %lx", addr
, size
);
624 static void cpu_ioreq_pio(ioreq_t
*req
)
628 sign
= req
->df
? -1 : 1;
630 if (req
->dir
== IOREQ_READ
) {
631 if (!req
->data_is_ptr
) {
632 req
->data
= do_inp(req
->addr
, req
->size
);
636 for (i
= 0; i
< req
->count
; i
++) {
637 tmp
= do_inp(req
->addr
, req
->size
);
638 cpu_physical_memory_write(req
->data
+ (sign
* i
* req
->size
),
639 (uint8_t *) &tmp
, req
->size
);
642 } else if (req
->dir
== IOREQ_WRITE
) {
643 if (!req
->data_is_ptr
) {
644 do_outp(req
->addr
, req
->size
, req
->data
);
646 for (i
= 0; i
< req
->count
; i
++) {
649 cpu_physical_memory_read(req
->data
+ (sign
* i
* req
->size
),
650 (uint8_t*) &tmp
, req
->size
);
651 do_outp(req
->addr
, req
->size
, tmp
);
657 static void cpu_ioreq_move(ioreq_t
*req
)
661 sign
= req
->df
? -1 : 1;
663 if (!req
->data_is_ptr
) {
664 if (req
->dir
== IOREQ_READ
) {
665 for (i
= 0; i
< req
->count
; i
++) {
666 cpu_physical_memory_read(req
->addr
+ (sign
* i
* req
->size
),
667 (uint8_t *) &req
->data
, req
->size
);
669 } else if (req
->dir
== IOREQ_WRITE
) {
670 for (i
= 0; i
< req
->count
; i
++) {
671 cpu_physical_memory_write(req
->addr
+ (sign
* i
* req
->size
),
672 (uint8_t *) &req
->data
, req
->size
);
678 if (req
->dir
== IOREQ_READ
) {
679 for (i
= 0; i
< req
->count
; i
++) {
680 cpu_physical_memory_read(req
->addr
+ (sign
* i
* req
->size
),
681 (uint8_t*) &tmp
, req
->size
);
682 cpu_physical_memory_write(req
->data
+ (sign
* i
* req
->size
),
683 (uint8_t*) &tmp
, req
->size
);
685 } else if (req
->dir
== IOREQ_WRITE
) {
686 for (i
= 0; i
< req
->count
; i
++) {
687 cpu_physical_memory_read(req
->data
+ (sign
* i
* req
->size
),
688 (uint8_t*) &tmp
, req
->size
);
689 cpu_physical_memory_write(req
->addr
+ (sign
* i
* req
->size
),
690 (uint8_t*) &tmp
, req
->size
);
696 static void handle_ioreq(ioreq_t
*req
)
698 if (!req
->data_is_ptr
&& (req
->dir
== IOREQ_WRITE
) &&
699 (req
->size
< sizeof (target_ulong
))) {
700 req
->data
&= ((target_ulong
) 1 << (8 * req
->size
)) - 1;
707 case IOREQ_TYPE_COPY
:
710 case IOREQ_TYPE_TIMEOFFSET
:
712 case IOREQ_TYPE_INVALIDATE
:
713 xen_invalidate_map_cache();
716 hw_error("Invalid ioreq type 0x%x\n", req
->type
);
720 static void handle_buffered_iopage(XenIOState
*state
)
722 buf_ioreq_t
*buf_req
= NULL
;
726 if (!state
->buffered_io_page
) {
730 while (state
->buffered_io_page
->read_pointer
!= state
->buffered_io_page
->write_pointer
) {
731 buf_req
= &state
->buffered_io_page
->buf_ioreq
[
732 state
->buffered_io_page
->read_pointer
% IOREQ_BUFFER_SLOT_NUM
];
733 req
.size
= 1UL << buf_req
->size
;
735 req
.addr
= buf_req
->addr
;
736 req
.data
= buf_req
->data
;
737 req
.state
= STATE_IOREQ_READY
;
738 req
.dir
= buf_req
->dir
;
740 req
.type
= buf_req
->type
;
742 qw
= (req
.size
== 8);
744 buf_req
= &state
->buffered_io_page
->buf_ioreq
[
745 (state
->buffered_io_page
->read_pointer
+ 1) % IOREQ_BUFFER_SLOT_NUM
];
746 req
.data
|= ((uint64_t)buf_req
->data
) << 32;
752 state
->buffered_io_page
->read_pointer
+= qw
? 2 : 1;
756 static void handle_buffered_io(void *opaque
)
758 XenIOState
*state
= opaque
;
760 handle_buffered_iopage(state
);
761 qemu_mod_timer(state
->buffered_io_timer
,
762 BUFFER_IO_MAX_DELAY
+ qemu_get_clock_ms(rt_clock
));
765 static void cpu_handle_ioreq(void *opaque
)
767 XenIOState
*state
= opaque
;
768 ioreq_t
*req
= cpu_get_ioreq(state
);
770 handle_buffered_iopage(state
);
774 if (req
->state
!= STATE_IOREQ_INPROCESS
) {
775 fprintf(stderr
, "Badness in I/O request ... not in service?!: "
776 "%x, ptr: %x, port: %"PRIx64
", "
777 "data: %"PRIx64
", count: %" FMT_ioreq_size
", size: %" FMT_ioreq_size
"\n",
778 req
->state
, req
->data_is_ptr
, req
->addr
,
779 req
->data
, req
->count
, req
->size
);
780 destroy_hvm_domain();
784 xen_wmb(); /* Update ioreq contents /then/ update state. */
787 * We do this before we send the response so that the tools
788 * have the opportunity to pick up on the reset before the
789 * guest resumes and does a hlt with interrupts disabled which
790 * causes Xen to powerdown the domain.
792 if (runstate_is_running()) {
793 if (qemu_shutdown_requested_get()) {
794 destroy_hvm_domain();
796 if (qemu_reset_requested_get()) {
797 qemu_system_reset(VMRESET_REPORT
);
801 req
->state
= STATE_IORESP_READY
;
802 xc_evtchn_notify(state
->xce_handle
, state
->ioreq_local_port
[state
->send_vcpu
]);
806 static int store_dev_info(int domid
, CharDriverState
*cs
, const char *string
)
808 struct xs_handle
*xs
= NULL
;
810 char *newpath
= NULL
;
814 /* Only continue if we're talking to a pty. */
815 if (strncmp(cs
->filename
, "pty:", 4)) {
818 pts
= cs
->filename
+ 4;
820 /* We now have everything we need to set the xenstore entry. */
823 fprintf(stderr
, "Could not contact XenStore\n");
827 path
= xs_get_domain_path(xs
, domid
);
829 fprintf(stderr
, "xs_get_domain_path() error\n");
832 newpath
= realloc(path
, (strlen(path
) + strlen(string
) +
833 strlen("/tty") + 1));
834 if (newpath
== NULL
) {
835 fprintf(stderr
, "realloc error\n");
840 strcat(path
, string
);
841 strcat(path
, "/tty");
842 if (!xs_write(xs
, XBT_NULL
, path
, pts
, strlen(pts
))) {
843 fprintf(stderr
, "xs_write for '%s' fail", string
);
855 void xenstore_store_pv_console_info(int i
, CharDriverState
*chr
)
858 store_dev_info(xen_domid
, chr
, "/console");
861 snprintf(buf
, sizeof(buf
), "/device/console/%d", i
);
862 store_dev_info(xen_domid
, chr
, buf
);
866 static void xenstore_record_dm_state(struct xs_handle
*xs
, const char *state
)
871 fprintf(stderr
, "xenstore connection not initialized\n");
875 snprintf(path
, sizeof (path
), "/local/domain/0/device-model/%u/state", xen_domid
);
876 if (!xs_write(xs
, XBT_NULL
, path
, state
, strlen(state
))) {
877 fprintf(stderr
, "error recording dm state\n");
882 static void xen_main_loop_prepare(XenIOState
*state
)
886 if (state
->xce_handle
!= XC_HANDLER_INITIAL_VALUE
) {
887 evtchn_fd
= xc_evtchn_fd(state
->xce_handle
);
890 state
->buffered_io_timer
= qemu_new_timer_ms(rt_clock
, handle_buffered_io
,
892 qemu_mod_timer(state
->buffered_io_timer
, qemu_get_clock_ms(rt_clock
));
894 if (evtchn_fd
!= -1) {
895 qemu_set_fd_handler(evtchn_fd
, cpu_handle_ioreq
, NULL
, state
);
902 static void xen_change_state_handler(void *opaque
, int running
,
906 /* record state running */
907 xenstore_record_dm_state(xenstore
, "running");
911 static void xen_hvm_change_state_handler(void *opaque
, int running
,
914 XenIOState
*xstate
= opaque
;
916 xen_main_loop_prepare(xstate
);
920 static void xen_exit_notifier(Notifier
*n
, void *data
)
922 XenIOState
*state
= container_of(n
, XenIOState
, exit
);
924 xc_evtchn_close(state
->xce_handle
);
925 xs_daemon_close(state
->xenstore
);
930 xen_xc
= xen_xc_interface_open(0, 0, 0);
931 if (xen_xc
== XC_HANDLER_INITIAL_VALUE
) {
932 xen_be_printf(NULL
, 0, "can't open xen interface\n");
935 qemu_add_vm_change_state_handler(xen_change_state_handler
, NULL
);
940 static void xen_read_physmap(XenIOState
*state
)
942 XenPhysmap
*physmap
= NULL
;
943 unsigned int len
, num
, i
;
944 char path
[80], *value
= NULL
;
945 char **entries
= NULL
;
947 snprintf(path
, sizeof(path
),
948 "/local/domain/0/device-model/%d/physmap", xen_domid
);
949 entries
= xs_directory(state
->xenstore
, 0, path
, &num
);
953 for (i
= 0; i
< num
; i
++) {
954 physmap
= g_malloc(sizeof (XenPhysmap
));
955 physmap
->phys_offset
= strtoull(entries
[i
], NULL
, 16);
956 snprintf(path
, sizeof(path
),
957 "/local/domain/0/device-model/%d/physmap/%s/start_addr",
958 xen_domid
, entries
[i
]);
959 value
= xs_read(state
->xenstore
, 0, path
, &len
);
964 physmap
->start_addr
= strtoull(value
, NULL
, 16);
967 snprintf(path
, sizeof(path
),
968 "/local/domain/0/device-model/%d/physmap/%s/size",
969 xen_domid
, entries
[i
]);
970 value
= xs_read(state
->xenstore
, 0, path
, &len
);
975 physmap
->size
= strtoull(value
, NULL
, 16);
978 snprintf(path
, sizeof(path
),
979 "/local/domain/0/device-model/%d/physmap/%s/name",
980 xen_domid
, entries
[i
]);
981 physmap
->name
= xs_read(state
->xenstore
, 0, path
, &len
);
983 QLIST_INSERT_HEAD(&state
->physmap
, physmap
, list
);
989 int xen_hvm_init(void)
992 unsigned long ioreq_pfn
;
995 state
= g_malloc0(sizeof (XenIOState
));
997 state
->xce_handle
= xen_xc_evtchn_open(NULL
, 0);
998 if (state
->xce_handle
== XC_HANDLER_INITIAL_VALUE
) {
999 perror("xen: event channel open");
1003 state
->xenstore
= xs_daemon_open();
1004 if (state
->xenstore
== NULL
) {
1005 perror("xen: xenstore open");
1009 state
->exit
.notify
= xen_exit_notifier
;
1010 qemu_add_exit_notifier(&state
->exit
);
1012 state
->suspend
.notify
= xen_suspend_notifier
;
1013 qemu_register_suspend_notifier(&state
->suspend
);
1015 xc_get_hvm_param(xen_xc
, xen_domid
, HVM_PARAM_IOREQ_PFN
, &ioreq_pfn
);
1016 DPRINTF("shared page at pfn %lx\n", ioreq_pfn
);
1017 state
->shared_page
= xc_map_foreign_range(xen_xc
, xen_domid
, XC_PAGE_SIZE
,
1018 PROT_READ
|PROT_WRITE
, ioreq_pfn
);
1019 if (state
->shared_page
== NULL
) {
1020 hw_error("map shared IO page returned error %d handle=" XC_INTERFACE_FMT
,
1024 xc_get_hvm_param(xen_xc
, xen_domid
, HVM_PARAM_BUFIOREQ_PFN
, &ioreq_pfn
);
1025 DPRINTF("buffered io page at pfn %lx\n", ioreq_pfn
);
1026 state
->buffered_io_page
= xc_map_foreign_range(xen_xc
, xen_domid
, XC_PAGE_SIZE
,
1027 PROT_READ
|PROT_WRITE
, ioreq_pfn
);
1028 if (state
->buffered_io_page
== NULL
) {
1029 hw_error("map buffered IO page returned error %d", errno
);
1032 state
->ioreq_local_port
= g_malloc0(smp_cpus
* sizeof (evtchn_port_t
));
1034 /* FIXME: how about if we overflow the page here? */
1035 for (i
= 0; i
< smp_cpus
; i
++) {
1036 rc
= xc_evtchn_bind_interdomain(state
->xce_handle
, xen_domid
,
1037 xen_vcpu_eport(state
->shared_page
, i
));
1039 fprintf(stderr
, "bind interdomain ioctl error %d\n", errno
);
1042 state
->ioreq_local_port
[i
] = rc
;
1045 /* Init RAM management */
1046 xen_map_cache_init();
1047 xen_ram_init(ram_size
);
1049 qemu_add_vm_change_state_handler(xen_hvm_change_state_handler
, state
);
1051 state
->memory_listener
= xen_memory_listener
;
1052 QLIST_INIT(&state
->physmap
);
1053 memory_listener_register(&state
->memory_listener
);
1054 state
->log_for_dirtybit
= NULL
;
1056 /* Initialize backend core & drivers */
1057 if (xen_be_init() != 0) {
1058 fprintf(stderr
, "%s: xen backend core setup failed\n", __FUNCTION__
);
1061 xen_be_register("console", &xen_console_ops
);
1062 xen_be_register("vkbd", &xen_kbdmouse_ops
);
1063 xen_be_register("qdisk", &xen_blkdev_ops
);
1064 xen_read_physmap(state
);
1069 void destroy_hvm_domain(void)
1074 xc_handle
= xen_xc_interface_open(0, 0, 0);
1075 if (xc_handle
== XC_HANDLER_INITIAL_VALUE
) {
1076 fprintf(stderr
, "Cannot acquire xenctrl handle\n");
1078 sts
= xc_domain_shutdown(xc_handle
, xen_domid
, SHUTDOWN_poweroff
);
1080 fprintf(stderr
, "? xc_domain_shutdown failed to issue poweroff, "
1081 "sts %d, %s\n", sts
, strerror(errno
));
1083 fprintf(stderr
, "Issued domain %d poweroff\n", xen_domid
);
1085 xc_interface_close(xc_handle
);
1089 void xen_register_framebuffer(MemoryRegion
*mr
)