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 static target_phys_addr_t
xen_phys_offset_to_gaddr(target_phys_addr_t start_addr
,
229 ram_addr_t size
, void *opaque
)
231 target_phys_addr_t addr
= start_addr
& TARGET_PAGE_MASK
;
232 XenIOState
*xen_io_state
= opaque
;
233 XenPhysmap
*physmap
= NULL
;
235 QLIST_FOREACH(physmap
, &xen_io_state
->physmap
, list
) {
236 if (range_covers_byte(physmap
->phys_offset
, physmap
->size
, addr
)) {
237 return physmap
->start_addr
;
244 #if CONFIG_XEN_CTRL_INTERFACE_VERSION >= 340
245 static int xen_add_to_physmap(XenIOState
*state
,
246 target_phys_addr_t start_addr
,
249 target_phys_addr_t offset_within_region
)
253 XenPhysmap
*physmap
= NULL
;
254 target_phys_addr_t pfn
, start_gpfn
;
255 target_phys_addr_t phys_offset
= memory_region_get_ram_addr(mr
);
256 char path
[80], value
[17];
258 if (get_physmapping(state
, start_addr
, size
)) {
265 /* Xen can only handle a single dirty log region for now and we want
266 * the linear framebuffer to be that region.
267 * Avoid tracking any regions that is not videoram and avoid tracking
268 * the legacy vga region. */
269 if (mr
== framebuffer
&& start_addr
> 0xbffff) {
275 DPRINTF("mapping vram to %llx - %llx\n", start_addr
, start_addr
+ size
);
277 pfn
= phys_offset
>> TARGET_PAGE_BITS
;
278 start_gpfn
= start_addr
>> TARGET_PAGE_BITS
;
279 for (i
= 0; i
< size
>> TARGET_PAGE_BITS
; i
++) {
280 unsigned long idx
= pfn
+ i
;
281 xen_pfn_t gpfn
= start_gpfn
+ i
;
283 rc
= xc_domain_add_to_physmap(xen_xc
, xen_domid
, XENMAPSPACE_gmfn
, idx
, gpfn
);
285 DPRINTF("add_to_physmap MFN %"PRI_xen_pfn
" to PFN %"
286 PRI_xen_pfn
" failed: %d\n", idx
, gpfn
, rc
);
291 physmap
= g_malloc(sizeof (XenPhysmap
));
293 physmap
->start_addr
= start_addr
;
294 physmap
->size
= size
;
295 physmap
->name
= (char *)mr
->name
;
296 physmap
->phys_offset
= phys_offset
;
298 QLIST_INSERT_HEAD(&state
->physmap
, physmap
, list
);
300 xc_domain_pin_memory_cacheattr(xen_xc
, xen_domid
,
301 start_addr
>> TARGET_PAGE_BITS
,
302 (start_addr
+ size
) >> TARGET_PAGE_BITS
,
303 XEN_DOMCTL_MEM_CACHEATTR_WB
);
305 snprintf(path
, sizeof(path
),
306 "/local/domain/0/device-model/%d/physmap/%"PRIx64
"/start_addr",
307 xen_domid
, (uint64_t)phys_offset
);
308 snprintf(value
, sizeof(value
), "%"PRIx64
, (uint64_t)start_addr
);
309 if (!xs_write(state
->xenstore
, 0, path
, value
, strlen(value
))) {
312 snprintf(path
, sizeof(path
),
313 "/local/domain/0/device-model/%d/physmap/%"PRIx64
"/size",
314 xen_domid
, (uint64_t)phys_offset
);
315 snprintf(value
, sizeof(value
), "%"PRIx64
, (uint64_t)size
);
316 if (!xs_write(state
->xenstore
, 0, path
, value
, strlen(value
))) {
320 snprintf(path
, sizeof(path
),
321 "/local/domain/0/device-model/%d/physmap/%"PRIx64
"/name",
322 xen_domid
, (uint64_t)phys_offset
);
323 if (!xs_write(state
->xenstore
, 0, path
, mr
->name
, strlen(mr
->name
))) {
331 static int xen_remove_from_physmap(XenIOState
*state
,
332 target_phys_addr_t start_addr
,
337 XenPhysmap
*physmap
= NULL
;
338 target_phys_addr_t phys_offset
= 0;
340 physmap
= get_physmapping(state
, start_addr
, size
);
341 if (physmap
== NULL
) {
345 phys_offset
= physmap
->phys_offset
;
346 size
= physmap
->size
;
348 DPRINTF("unmapping vram to %llx - %llx, from %llx\n",
349 phys_offset
, phys_offset
+ size
, start_addr
);
351 size
>>= TARGET_PAGE_BITS
;
352 start_addr
>>= TARGET_PAGE_BITS
;
353 phys_offset
>>= TARGET_PAGE_BITS
;
354 for (i
= 0; i
< size
; i
++) {
355 unsigned long idx
= start_addr
+ i
;
356 xen_pfn_t gpfn
= phys_offset
+ i
;
358 rc
= xc_domain_add_to_physmap(xen_xc
, xen_domid
, XENMAPSPACE_gmfn
, idx
, gpfn
);
360 fprintf(stderr
, "add_to_physmap MFN %"PRI_xen_pfn
" to PFN %"
361 PRI_xen_pfn
" failed: %d\n", idx
, gpfn
, rc
);
366 QLIST_REMOVE(physmap
, list
);
367 if (state
->log_for_dirtybit
== physmap
) {
368 state
->log_for_dirtybit
= NULL
;
376 static int xen_add_to_physmap(XenIOState
*state
,
377 target_phys_addr_t start_addr
,
380 target_phys_addr_t offset_within_region
)
385 static int xen_remove_from_physmap(XenIOState
*state
,
386 target_phys_addr_t start_addr
,
393 static void xen_set_memory(struct MemoryListener
*listener
,
394 MemoryRegionSection
*section
,
397 XenIOState
*state
= container_of(listener
, XenIOState
, memory_listener
);
398 target_phys_addr_t start_addr
= section
->offset_within_address_space
;
399 ram_addr_t size
= section
->size
;
400 bool log_dirty
= memory_region_is_logging(section
->mr
);
401 hvmmem_type_t mem_type
;
403 if (!memory_region_is_ram(section
->mr
)) {
407 if (!(section
->mr
!= &ram_memory
408 && ( (log_dirty
&& add
) || (!log_dirty
&& !add
)))) {
412 trace_xen_client_set_memory(start_addr
, size
, log_dirty
);
414 start_addr
&= TARGET_PAGE_MASK
;
415 size
= TARGET_PAGE_ALIGN(size
);
418 if (!memory_region_is_rom(section
->mr
)) {
419 xen_add_to_physmap(state
, start_addr
, size
,
420 section
->mr
, section
->offset_within_region
);
422 mem_type
= HVMMEM_ram_ro
;
423 if (xc_hvm_set_mem_type(xen_xc
, xen_domid
, mem_type
,
424 start_addr
>> TARGET_PAGE_BITS
,
425 size
>> TARGET_PAGE_BITS
)) {
426 DPRINTF("xc_hvm_set_mem_type error, addr: "TARGET_FMT_plx
"\n",
431 if (xen_remove_from_physmap(state
, start_addr
, size
) < 0) {
432 DPRINTF("physmapping does not exist at "TARGET_FMT_plx
"\n", start_addr
);
437 static void xen_region_add(MemoryListener
*listener
,
438 MemoryRegionSection
*section
)
440 xen_set_memory(listener
, section
, true);
443 static void xen_region_del(MemoryListener
*listener
,
444 MemoryRegionSection
*section
)
446 xen_set_memory(listener
, section
, false);
449 static void xen_sync_dirty_bitmap(XenIOState
*state
,
450 target_phys_addr_t start_addr
,
453 target_phys_addr_t npages
= size
>> TARGET_PAGE_BITS
;
454 const int width
= sizeof(unsigned long) * 8;
455 unsigned long bitmap
[(npages
+ width
- 1) / width
];
457 const XenPhysmap
*physmap
= NULL
;
459 physmap
= get_physmapping(state
, start_addr
, size
);
460 if (physmap
== NULL
) {
465 if (state
->log_for_dirtybit
== NULL
) {
466 state
->log_for_dirtybit
= physmap
;
467 } else if (state
->log_for_dirtybit
!= physmap
) {
468 /* Only one range for dirty bitmap can be tracked. */
472 rc
= xc_hvm_track_dirty_vram(xen_xc
, xen_domid
,
473 start_addr
>> TARGET_PAGE_BITS
, npages
,
476 if (rc
!= -ENODATA
) {
477 fprintf(stderr
, "xen: track_dirty_vram failed (0x" TARGET_FMT_plx
478 ", 0x" TARGET_FMT_plx
"): %s\n",
479 start_addr
, start_addr
+ size
, strerror(-rc
));
484 for (i
= 0; i
< ARRAY_SIZE(bitmap
); i
++) {
485 unsigned long map
= bitmap
[i
];
489 memory_region_set_dirty(framebuffer
,
490 (i
* width
+ j
) * TARGET_PAGE_SIZE
,
496 static void xen_log_start(MemoryListener
*listener
,
497 MemoryRegionSection
*section
)
499 XenIOState
*state
= container_of(listener
, XenIOState
, memory_listener
);
501 xen_sync_dirty_bitmap(state
, section
->offset_within_address_space
,
505 static void xen_log_stop(MemoryListener
*listener
, MemoryRegionSection
*section
)
507 XenIOState
*state
= container_of(listener
, XenIOState
, memory_listener
);
509 state
->log_for_dirtybit
= NULL
;
510 /* Disable dirty bit tracking */
511 xc_hvm_track_dirty_vram(xen_xc
, xen_domid
, 0, 0, NULL
);
514 static void xen_log_sync(MemoryListener
*listener
, MemoryRegionSection
*section
)
516 XenIOState
*state
= container_of(listener
, XenIOState
, memory_listener
);
518 xen_sync_dirty_bitmap(state
, section
->offset_within_address_space
,
522 static void xen_log_global_start(MemoryListener
*listener
)
526 static void xen_log_global_stop(MemoryListener
*listener
)
530 static MemoryListener xen_memory_listener
= {
531 .region_add
= xen_region_add
,
532 .region_del
= xen_region_del
,
533 .log_start
= xen_log_start
,
534 .log_stop
= xen_log_stop
,
535 .log_sync
= xen_log_sync
,
536 .log_global_start
= xen_log_global_start
,
537 .log_global_stop
= xen_log_global_stop
,
540 /* VCPU Operations, MMIO, IO ring ... */
542 static void xen_reset_vcpu(void *opaque
)
544 CPUState
*env
= opaque
;
549 void xen_vcpu_init(void)
553 if ((first_cpu
= qemu_get_cpu(0))) {
554 qemu_register_reset(xen_reset_vcpu
, first_cpu
);
555 xen_reset_vcpu(first_cpu
);
559 /* get the ioreq packets from share mem */
560 static ioreq_t
*cpu_get_ioreq_from_shared_memory(XenIOState
*state
, int vcpu
)
562 ioreq_t
*req
= xen_vcpu_ioreq(state
->shared_page
, vcpu
);
564 if (req
->state
!= STATE_IOREQ_READY
) {
565 DPRINTF("I/O request not ready: "
566 "%x, ptr: %x, port: %"PRIx64
", "
567 "data: %"PRIx64
", count: %" FMT_ioreq_size
", size: %" FMT_ioreq_size
"\n",
568 req
->state
, req
->data_is_ptr
, req
->addr
,
569 req
->data
, req
->count
, req
->size
);
573 xen_rmb(); /* see IOREQ_READY /then/ read contents of ioreq */
575 req
->state
= STATE_IOREQ_INPROCESS
;
579 /* use poll to get the port notification */
580 /* ioreq_vec--out,the */
581 /* retval--the number of ioreq packet */
582 static ioreq_t
*cpu_get_ioreq(XenIOState
*state
)
587 port
= xc_evtchn_pending(state
->xce_handle
);
589 for (i
= 0; i
< smp_cpus
; i
++) {
590 if (state
->ioreq_local_port
[i
] == port
) {
596 hw_error("Fatal error while trying to get io event!\n");
599 /* unmask the wanted port again */
600 xc_evtchn_unmask(state
->xce_handle
, port
);
602 /* get the io packet from shared memory */
603 state
->send_vcpu
= i
;
604 return cpu_get_ioreq_from_shared_memory(state
, i
);
607 /* read error or read nothing */
611 static uint32_t do_inp(pio_addr_t addr
, unsigned long size
)
615 return cpu_inb(addr
);
617 return cpu_inw(addr
);
619 return cpu_inl(addr
);
621 hw_error("inp: bad size: %04"FMT_pioaddr
" %lx", addr
, size
);
625 static void do_outp(pio_addr_t addr
,
626 unsigned long size
, uint32_t val
)
630 return cpu_outb(addr
, val
);
632 return cpu_outw(addr
, val
);
634 return cpu_outl(addr
, val
);
636 hw_error("outp: bad size: %04"FMT_pioaddr
" %lx", addr
, size
);
640 static void cpu_ioreq_pio(ioreq_t
*req
)
644 sign
= req
->df
? -1 : 1;
646 if (req
->dir
== IOREQ_READ
) {
647 if (!req
->data_is_ptr
) {
648 req
->data
= do_inp(req
->addr
, req
->size
);
652 for (i
= 0; i
< req
->count
; i
++) {
653 tmp
= do_inp(req
->addr
, req
->size
);
654 cpu_physical_memory_write(req
->data
+ (sign
* i
* req
->size
),
655 (uint8_t *) &tmp
, req
->size
);
658 } else if (req
->dir
== IOREQ_WRITE
) {
659 if (!req
->data_is_ptr
) {
660 do_outp(req
->addr
, req
->size
, req
->data
);
662 for (i
= 0; i
< req
->count
; i
++) {
665 cpu_physical_memory_read(req
->data
+ (sign
* i
* req
->size
),
666 (uint8_t*) &tmp
, req
->size
);
667 do_outp(req
->addr
, req
->size
, tmp
);
673 static void cpu_ioreq_move(ioreq_t
*req
)
677 sign
= req
->df
? -1 : 1;
679 if (!req
->data_is_ptr
) {
680 if (req
->dir
== IOREQ_READ
) {
681 for (i
= 0; i
< req
->count
; i
++) {
682 cpu_physical_memory_read(req
->addr
+ (sign
* i
* req
->size
),
683 (uint8_t *) &req
->data
, req
->size
);
685 } else if (req
->dir
== IOREQ_WRITE
) {
686 for (i
= 0; i
< req
->count
; i
++) {
687 cpu_physical_memory_write(req
->addr
+ (sign
* i
* req
->size
),
688 (uint8_t *) &req
->data
, req
->size
);
694 if (req
->dir
== IOREQ_READ
) {
695 for (i
= 0; i
< req
->count
; i
++) {
696 cpu_physical_memory_read(req
->addr
+ (sign
* i
* req
->size
),
697 (uint8_t*) &tmp
, req
->size
);
698 cpu_physical_memory_write(req
->data
+ (sign
* i
* req
->size
),
699 (uint8_t*) &tmp
, req
->size
);
701 } else if (req
->dir
== IOREQ_WRITE
) {
702 for (i
= 0; i
< req
->count
; i
++) {
703 cpu_physical_memory_read(req
->data
+ (sign
* i
* req
->size
),
704 (uint8_t*) &tmp
, req
->size
);
705 cpu_physical_memory_write(req
->addr
+ (sign
* i
* req
->size
),
706 (uint8_t*) &tmp
, req
->size
);
712 static void handle_ioreq(ioreq_t
*req
)
714 if (!req
->data_is_ptr
&& (req
->dir
== IOREQ_WRITE
) &&
715 (req
->size
< sizeof (target_ulong
))) {
716 req
->data
&= ((target_ulong
) 1 << (8 * req
->size
)) - 1;
723 case IOREQ_TYPE_COPY
:
726 case IOREQ_TYPE_TIMEOFFSET
:
728 case IOREQ_TYPE_INVALIDATE
:
729 xen_invalidate_map_cache();
732 hw_error("Invalid ioreq type 0x%x\n", req
->type
);
736 static void handle_buffered_iopage(XenIOState
*state
)
738 buf_ioreq_t
*buf_req
= NULL
;
742 if (!state
->buffered_io_page
) {
746 while (state
->buffered_io_page
->read_pointer
!= state
->buffered_io_page
->write_pointer
) {
747 buf_req
= &state
->buffered_io_page
->buf_ioreq
[
748 state
->buffered_io_page
->read_pointer
% IOREQ_BUFFER_SLOT_NUM
];
749 req
.size
= 1UL << buf_req
->size
;
751 req
.addr
= buf_req
->addr
;
752 req
.data
= buf_req
->data
;
753 req
.state
= STATE_IOREQ_READY
;
754 req
.dir
= buf_req
->dir
;
756 req
.type
= buf_req
->type
;
758 qw
= (req
.size
== 8);
760 buf_req
= &state
->buffered_io_page
->buf_ioreq
[
761 (state
->buffered_io_page
->read_pointer
+ 1) % IOREQ_BUFFER_SLOT_NUM
];
762 req
.data
|= ((uint64_t)buf_req
->data
) << 32;
768 state
->buffered_io_page
->read_pointer
+= qw
? 2 : 1;
772 static void handle_buffered_io(void *opaque
)
774 XenIOState
*state
= opaque
;
776 handle_buffered_iopage(state
);
777 qemu_mod_timer(state
->buffered_io_timer
,
778 BUFFER_IO_MAX_DELAY
+ qemu_get_clock_ms(rt_clock
));
781 static void cpu_handle_ioreq(void *opaque
)
783 XenIOState
*state
= opaque
;
784 ioreq_t
*req
= cpu_get_ioreq(state
);
786 handle_buffered_iopage(state
);
790 if (req
->state
!= STATE_IOREQ_INPROCESS
) {
791 fprintf(stderr
, "Badness in I/O request ... not in service?!: "
792 "%x, ptr: %x, port: %"PRIx64
", "
793 "data: %"PRIx64
", count: %" FMT_ioreq_size
", size: %" FMT_ioreq_size
"\n",
794 req
->state
, req
->data_is_ptr
, req
->addr
,
795 req
->data
, req
->count
, req
->size
);
796 destroy_hvm_domain();
800 xen_wmb(); /* Update ioreq contents /then/ update state. */
803 * We do this before we send the response so that the tools
804 * have the opportunity to pick up on the reset before the
805 * guest resumes and does a hlt with interrupts disabled which
806 * causes Xen to powerdown the domain.
808 if (runstate_is_running()) {
809 if (qemu_shutdown_requested_get()) {
810 destroy_hvm_domain();
812 if (qemu_reset_requested_get()) {
813 qemu_system_reset(VMRESET_REPORT
);
817 req
->state
= STATE_IORESP_READY
;
818 xc_evtchn_notify(state
->xce_handle
, state
->ioreq_local_port
[state
->send_vcpu
]);
822 static int store_dev_info(int domid
, CharDriverState
*cs
, const char *string
)
824 struct xs_handle
*xs
= NULL
;
826 char *newpath
= NULL
;
830 /* Only continue if we're talking to a pty. */
831 if (strncmp(cs
->filename
, "pty:", 4)) {
834 pts
= cs
->filename
+ 4;
836 /* We now have everything we need to set the xenstore entry. */
839 fprintf(stderr
, "Could not contact XenStore\n");
843 path
= xs_get_domain_path(xs
, domid
);
845 fprintf(stderr
, "xs_get_domain_path() error\n");
848 newpath
= realloc(path
, (strlen(path
) + strlen(string
) +
849 strlen("/tty") + 1));
850 if (newpath
== NULL
) {
851 fprintf(stderr
, "realloc error\n");
856 strcat(path
, string
);
857 strcat(path
, "/tty");
858 if (!xs_write(xs
, XBT_NULL
, path
, pts
, strlen(pts
))) {
859 fprintf(stderr
, "xs_write for '%s' fail", string
);
871 void xenstore_store_pv_console_info(int i
, CharDriverState
*chr
)
874 store_dev_info(xen_domid
, chr
, "/console");
877 snprintf(buf
, sizeof(buf
), "/device/console/%d", i
);
878 store_dev_info(xen_domid
, chr
, buf
);
882 static void xenstore_record_dm_state(struct xs_handle
*xs
, const char *state
)
887 fprintf(stderr
, "xenstore connection not initialized\n");
891 snprintf(path
, sizeof (path
), "/local/domain/0/device-model/%u/state", xen_domid
);
892 if (!xs_write(xs
, XBT_NULL
, path
, state
, strlen(state
))) {
893 fprintf(stderr
, "error recording dm state\n");
898 static void xen_main_loop_prepare(XenIOState
*state
)
902 if (state
->xce_handle
!= XC_HANDLER_INITIAL_VALUE
) {
903 evtchn_fd
= xc_evtchn_fd(state
->xce_handle
);
906 state
->buffered_io_timer
= qemu_new_timer_ms(rt_clock
, handle_buffered_io
,
908 qemu_mod_timer(state
->buffered_io_timer
, qemu_get_clock_ms(rt_clock
));
910 if (evtchn_fd
!= -1) {
911 qemu_set_fd_handler(evtchn_fd
, cpu_handle_ioreq
, NULL
, state
);
918 static void xen_change_state_handler(void *opaque
, int running
,
922 /* record state running */
923 xenstore_record_dm_state(xenstore
, "running");
927 static void xen_hvm_change_state_handler(void *opaque
, int running
,
930 XenIOState
*xstate
= opaque
;
932 xen_main_loop_prepare(xstate
);
936 static void xen_exit_notifier(Notifier
*n
, void *data
)
938 XenIOState
*state
= container_of(n
, XenIOState
, exit
);
940 xc_evtchn_close(state
->xce_handle
);
941 xs_daemon_close(state
->xenstore
);
946 xen_xc
= xen_xc_interface_open(0, 0, 0);
947 if (xen_xc
== XC_HANDLER_INITIAL_VALUE
) {
948 xen_be_printf(NULL
, 0, "can't open xen interface\n");
951 qemu_add_vm_change_state_handler(xen_change_state_handler
, NULL
);
956 static void xen_read_physmap(XenIOState
*state
)
958 XenPhysmap
*physmap
= NULL
;
959 unsigned int len
, num
, i
;
960 char path
[80], *value
= NULL
;
961 char **entries
= NULL
;
963 snprintf(path
, sizeof(path
),
964 "/local/domain/0/device-model/%d/physmap", xen_domid
);
965 entries
= xs_directory(state
->xenstore
, 0, path
, &num
);
969 for (i
= 0; i
< num
; i
++) {
970 physmap
= g_malloc(sizeof (XenPhysmap
));
971 physmap
->phys_offset
= strtoull(entries
[i
], NULL
, 16);
972 snprintf(path
, sizeof(path
),
973 "/local/domain/0/device-model/%d/physmap/%s/start_addr",
974 xen_domid
, entries
[i
]);
975 value
= xs_read(state
->xenstore
, 0, path
, &len
);
980 physmap
->start_addr
= strtoull(value
, NULL
, 16);
983 snprintf(path
, sizeof(path
),
984 "/local/domain/0/device-model/%d/physmap/%s/size",
985 xen_domid
, entries
[i
]);
986 value
= xs_read(state
->xenstore
, 0, path
, &len
);
991 physmap
->size
= strtoull(value
, NULL
, 16);
994 snprintf(path
, sizeof(path
),
995 "/local/domain/0/device-model/%d/physmap/%s/name",
996 xen_domid
, entries
[i
]);
997 physmap
->name
= xs_read(state
->xenstore
, 0, path
, &len
);
999 QLIST_INSERT_HEAD(&state
->physmap
, physmap
, list
);
1005 int xen_hvm_init(void)
1008 unsigned long ioreq_pfn
;
1011 state
= g_malloc0(sizeof (XenIOState
));
1013 state
->xce_handle
= xen_xc_evtchn_open(NULL
, 0);
1014 if (state
->xce_handle
== XC_HANDLER_INITIAL_VALUE
) {
1015 perror("xen: event channel open");
1019 state
->xenstore
= xs_daemon_open();
1020 if (state
->xenstore
== NULL
) {
1021 perror("xen: xenstore open");
1025 state
->exit
.notify
= xen_exit_notifier
;
1026 qemu_add_exit_notifier(&state
->exit
);
1028 state
->suspend
.notify
= xen_suspend_notifier
;
1029 qemu_register_suspend_notifier(&state
->suspend
);
1031 xc_get_hvm_param(xen_xc
, xen_domid
, HVM_PARAM_IOREQ_PFN
, &ioreq_pfn
);
1032 DPRINTF("shared page at pfn %lx\n", ioreq_pfn
);
1033 state
->shared_page
= xc_map_foreign_range(xen_xc
, xen_domid
, XC_PAGE_SIZE
,
1034 PROT_READ
|PROT_WRITE
, ioreq_pfn
);
1035 if (state
->shared_page
== NULL
) {
1036 hw_error("map shared IO page returned error %d handle=" XC_INTERFACE_FMT
,
1040 xc_get_hvm_param(xen_xc
, xen_domid
, HVM_PARAM_BUFIOREQ_PFN
, &ioreq_pfn
);
1041 DPRINTF("buffered io page at pfn %lx\n", ioreq_pfn
);
1042 state
->buffered_io_page
= xc_map_foreign_range(xen_xc
, xen_domid
, XC_PAGE_SIZE
,
1043 PROT_READ
|PROT_WRITE
, ioreq_pfn
);
1044 if (state
->buffered_io_page
== NULL
) {
1045 hw_error("map buffered IO page returned error %d", errno
);
1048 state
->ioreq_local_port
= g_malloc0(smp_cpus
* sizeof (evtchn_port_t
));
1050 /* FIXME: how about if we overflow the page here? */
1051 for (i
= 0; i
< smp_cpus
; i
++) {
1052 rc
= xc_evtchn_bind_interdomain(state
->xce_handle
, xen_domid
,
1053 xen_vcpu_eport(state
->shared_page
, i
));
1055 fprintf(stderr
, "bind interdomain ioctl error %d\n", errno
);
1058 state
->ioreq_local_port
[i
] = rc
;
1061 /* Init RAM management */
1062 xen_map_cache_init(xen_phys_offset_to_gaddr
, state
);
1063 xen_ram_init(ram_size
);
1065 qemu_add_vm_change_state_handler(xen_hvm_change_state_handler
, state
);
1067 state
->memory_listener
= xen_memory_listener
;
1068 QLIST_INIT(&state
->physmap
);
1069 memory_listener_register(&state
->memory_listener
);
1070 state
->log_for_dirtybit
= NULL
;
1072 /* Initialize backend core & drivers */
1073 if (xen_be_init() != 0) {
1074 fprintf(stderr
, "%s: xen backend core setup failed\n", __FUNCTION__
);
1077 xen_be_register("console", &xen_console_ops
);
1078 xen_be_register("vkbd", &xen_kbdmouse_ops
);
1079 xen_be_register("qdisk", &xen_blkdev_ops
);
1080 xen_read_physmap(state
);
1085 void destroy_hvm_domain(void)
1090 xc_handle
= xen_xc_interface_open(0, 0, 0);
1091 if (xc_handle
== XC_HANDLER_INITIAL_VALUE
) {
1092 fprintf(stderr
, "Cannot acquire xenctrl handle\n");
1094 sts
= xc_domain_shutdown(xc_handle
, xen_domid
, SHUTDOWN_poweroff
);
1096 fprintf(stderr
, "? xc_domain_shutdown failed to issue poweroff, "
1097 "sts %d, %s\n", sts
, strerror(errno
));
1099 fprintf(stderr
, "Issued domain %d poweroff\n", xen_domid
);
1101 xc_interface_close(xc_handle
);
1105 void xen_register_framebuffer(MemoryRegion
*mr
)