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.
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"
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_HVM
32 #define DPRINTF(fmt, ...) \
33 do { fprintf(stderr, "xen: " fmt, ## __VA_ARGS__); } while (0)
35 #define DPRINTF(fmt, ...) \
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 */
45 /* This allows QEMU to build on a system that has Xen 4.5 or earlier
46 * installed. This here (not in hw/xen/xen_common.h) because xen/hvm/ioreq.h
47 * needs to be included before this block and hw/xen/xen_common.h needs to
48 * be included before xen/hvm/ioreq.h
50 #ifndef IOREQ_TYPE_VMWARE_PORT
51 #define IOREQ_TYPE_VMWARE_PORT 3
59 typedef struct vmware_regs vmware_regs_t
;
61 struct shared_vmport_iopage
{
62 struct vmware_regs vcpu_vmport_regs
[1];
64 typedef struct shared_vmport_iopage shared_vmport_iopage_t
;
67 #if __XEN_LATEST_INTERFACE_VERSION__ < 0x0003020a
68 static inline uint32_t xen_vcpu_eport(shared_iopage_t
*shared_page
, int i
)
70 return shared_page
->vcpu_iodata
[i
].vp_eport
;
72 static inline ioreq_t
*xen_vcpu_ioreq(shared_iopage_t
*shared_page
, int vcpu
)
74 return &shared_page
->vcpu_iodata
[vcpu
].vp_ioreq
;
76 # define FMT_ioreq_size PRIx64
78 static inline uint32_t xen_vcpu_eport(shared_iopage_t
*shared_page
, int i
)
80 return shared_page
->vcpu_ioreq
[i
].vp_eport
;
82 static inline ioreq_t
*xen_vcpu_ioreq(shared_iopage_t
*shared_page
, int vcpu
)
84 return &shared_page
->vcpu_ioreq
[vcpu
];
86 # define FMT_ioreq_size "u"
89 #define BUFFER_IO_MAX_DELAY 100
91 typedef struct XenPhysmap
{
97 QLIST_ENTRY(XenPhysmap
) list
;
100 typedef struct XenIOState
{
102 shared_iopage_t
*shared_page
;
103 shared_vmport_iopage_t
*shared_vmport_page
;
104 buffered_iopage_t
*buffered_io_page
;
105 QEMUTimer
*buffered_io_timer
;
106 CPUState
**cpu_by_vcpu_id
;
107 /* the evtchn port for polling the notification, */
108 evtchn_port_t
*ioreq_local_port
;
109 /* evtchn local port for buffered io */
110 evtchn_port_t bufioreq_local_port
;
111 /* the evtchn fd for polling */
112 XenEvtchn xce_handle
;
113 /* which vcpu we are serving */
116 struct xs_handle
*xenstore
;
117 MemoryListener memory_listener
;
118 MemoryListener io_listener
;
119 DeviceListener device_listener
;
120 QLIST_HEAD(, XenPhysmap
) physmap
;
121 hwaddr free_phys_offset
;
122 const XenPhysmap
*log_for_dirtybit
;
129 /* Xen specific function for piix pci */
131 int xen_pci_slot_get_pirq(PCIDevice
*pci_dev
, int irq_num
)
133 return irq_num
+ ((pci_dev
->devfn
>> 3) << 2);
136 void xen_piix3_set_irq(void *opaque
, int irq_num
, int level
)
138 xc_hvm_set_pci_intx_level(xen_xc
, xen_domid
, 0, 0, irq_num
>> 2,
142 void xen_piix_pci_write_config_client(uint32_t address
, uint32_t val
, int len
)
146 /* Scan for updates to PCI link routes (0x60-0x63). */
147 for (i
= 0; i
< len
; i
++) {
148 uint8_t v
= (val
>> (8 * i
)) & 0xff;
153 if (((address
+ i
) >= 0x60) && ((address
+ i
) <= 0x63)) {
154 xc_hvm_set_pci_link_route(xen_xc
, xen_domid
, address
+ i
- 0x60, v
);
159 void xen_hvm_inject_msi(uint64_t addr
, uint32_t data
)
161 xen_xc_hvm_inject_msi(xen_xc
, xen_domid
, addr
, data
);
164 static void xen_suspend_notifier(Notifier
*notifier
, void *data
)
166 xc_set_hvm_param(xen_xc
, xen_domid
, HVM_PARAM_ACPI_S_STATE
, 3);
169 /* Xen Interrupt Controller */
171 static void xen_set_irq(void *opaque
, int irq
, int level
)
173 xc_hvm_set_isa_irq_level(xen_xc
, xen_domid
, irq
, level
);
176 qemu_irq
*xen_interrupt_controller_init(void)
178 return qemu_allocate_irqs(xen_set_irq
, NULL
, 16);
183 static void xen_ram_init(ram_addr_t
*below_4g_mem_size
,
184 ram_addr_t
*above_4g_mem_size
,
185 ram_addr_t ram_size
, MemoryRegion
**ram_memory_p
)
187 MemoryRegion
*sysmem
= get_system_memory();
188 ram_addr_t block_len
;
189 uint64_t user_lowmem
= object_property_get_int(qdev_get_machine(),
190 PC_MACHINE_MAX_RAM_BELOW_4G
,
193 /* Handle the machine opt max-ram-below-4g. It is basically doing
194 * min(xen limit, user limit).
196 if (HVM_BELOW_4G_RAM_END
<= user_lowmem
) {
197 user_lowmem
= HVM_BELOW_4G_RAM_END
;
200 if (ram_size
>= user_lowmem
) {
201 *above_4g_mem_size
= ram_size
- user_lowmem
;
202 *below_4g_mem_size
= user_lowmem
;
204 *above_4g_mem_size
= 0;
205 *below_4g_mem_size
= ram_size
;
207 if (!*above_4g_mem_size
) {
208 block_len
= ram_size
;
211 * Xen does not allocate the memory continuously, it keeps a
212 * hole of the size computed above or passed in.
214 block_len
= (1ULL << 32) + *above_4g_mem_size
;
216 memory_region_init_ram(&ram_memory
, NULL
, "xen.ram", block_len
,
218 *ram_memory_p
= &ram_memory
;
219 vmstate_register_ram_global(&ram_memory
);
221 memory_region_init_alias(&ram_640k
, NULL
, "xen.ram.640k",
222 &ram_memory
, 0, 0xa0000);
223 memory_region_add_subregion(sysmem
, 0, &ram_640k
);
224 /* Skip of the VGA IO memory space, it will be registered later by the VGA
227 * The area between 0xc0000 and 0x100000 will be used by SeaBIOS to load
228 * the Options ROM, so it is registered here as RAM.
230 memory_region_init_alias(&ram_lo
, NULL
, "xen.ram.lo",
231 &ram_memory
, 0xc0000,
232 *below_4g_mem_size
- 0xc0000);
233 memory_region_add_subregion(sysmem
, 0xc0000, &ram_lo
);
234 if (*above_4g_mem_size
> 0) {
235 memory_region_init_alias(&ram_hi
, NULL
, "xen.ram.hi",
236 &ram_memory
, 0x100000000ULL
,
238 memory_region_add_subregion(sysmem
, 0x100000000ULL
, &ram_hi
);
242 void xen_ram_alloc(ram_addr_t ram_addr
, ram_addr_t size
, MemoryRegion
*mr
)
244 unsigned long nr_pfn
;
248 if (runstate_check(RUN_STATE_INMIGRATE
)) {
249 /* RAM already populated in Xen */
250 fprintf(stderr
, "%s: do not alloc "RAM_ADDR_FMT
251 " bytes of ram at "RAM_ADDR_FMT
" when runstate is INMIGRATE\n",
252 __func__
, size
, ram_addr
);
256 if (mr
== &ram_memory
) {
260 trace_xen_ram_alloc(ram_addr
, size
);
262 nr_pfn
= size
>> TARGET_PAGE_BITS
;
263 pfn_list
= g_malloc(sizeof (*pfn_list
) * nr_pfn
);
265 for (i
= 0; i
< nr_pfn
; i
++) {
266 pfn_list
[i
] = (ram_addr
>> TARGET_PAGE_BITS
) + i
;
269 if (xc_domain_populate_physmap_exact(xen_xc
, xen_domid
, nr_pfn
, 0, 0, pfn_list
)) {
270 hw_error("xen: failed to populate ram at " RAM_ADDR_FMT
, ram_addr
);
276 static XenPhysmap
*get_physmapping(XenIOState
*state
,
277 hwaddr start_addr
, ram_addr_t size
)
279 XenPhysmap
*physmap
= NULL
;
281 start_addr
&= TARGET_PAGE_MASK
;
283 QLIST_FOREACH(physmap
, &state
->physmap
, list
) {
284 if (range_covers_byte(physmap
->start_addr
, physmap
->size
, start_addr
)) {
291 static hwaddr
xen_phys_offset_to_gaddr(hwaddr start_addr
,
292 ram_addr_t size
, void *opaque
)
294 hwaddr addr
= start_addr
& TARGET_PAGE_MASK
;
295 XenIOState
*xen_io_state
= opaque
;
296 XenPhysmap
*physmap
= NULL
;
298 QLIST_FOREACH(physmap
, &xen_io_state
->physmap
, list
) {
299 if (range_covers_byte(physmap
->phys_offset
, physmap
->size
, addr
)) {
300 return physmap
->start_addr
;
307 #if CONFIG_XEN_CTRL_INTERFACE_VERSION >= 340
308 static int xen_add_to_physmap(XenIOState
*state
,
312 hwaddr offset_within_region
)
316 XenPhysmap
*physmap
= NULL
;
317 hwaddr pfn
, start_gpfn
;
318 hwaddr phys_offset
= memory_region_get_ram_addr(mr
);
319 char path
[80], value
[17];
322 if (get_physmapping(state
, start_addr
, size
)) {
329 /* Xen can only handle a single dirty log region for now and we want
330 * the linear framebuffer to be that region.
331 * Avoid tracking any regions that is not videoram and avoid tracking
332 * the legacy vga region. */
333 if (mr
== framebuffer
&& start_addr
> 0xbffff) {
339 DPRINTF("mapping vram to %"HWADDR_PRIx
" - %"HWADDR_PRIx
"\n",
340 start_addr
, start_addr
+ size
);
342 pfn
= phys_offset
>> TARGET_PAGE_BITS
;
343 start_gpfn
= start_addr
>> TARGET_PAGE_BITS
;
344 for (i
= 0; i
< size
>> TARGET_PAGE_BITS
; i
++) {
345 unsigned long idx
= pfn
+ i
;
346 xen_pfn_t gpfn
= start_gpfn
+ i
;
348 rc
= xc_domain_add_to_physmap(xen_xc
, xen_domid
, XENMAPSPACE_gmfn
, idx
, gpfn
);
350 DPRINTF("add_to_physmap MFN %"PRI_xen_pfn
" to PFN %"
351 PRI_xen_pfn
" failed: %d\n", idx
, gpfn
, rc
);
356 mr_name
= memory_region_name(mr
);
358 physmap
= g_malloc(sizeof (XenPhysmap
));
360 physmap
->start_addr
= start_addr
;
361 physmap
->size
= size
;
362 physmap
->name
= mr_name
;
363 physmap
->phys_offset
= phys_offset
;
365 QLIST_INSERT_HEAD(&state
->physmap
, physmap
, list
);
367 xc_domain_pin_memory_cacheattr(xen_xc
, xen_domid
,
368 start_addr
>> TARGET_PAGE_BITS
,
369 (start_addr
+ size
- 1) >> TARGET_PAGE_BITS
,
370 XEN_DOMCTL_MEM_CACHEATTR_WB
);
372 snprintf(path
, sizeof(path
),
373 "/local/domain/0/device-model/%d/physmap/%"PRIx64
"/start_addr",
374 xen_domid
, (uint64_t)phys_offset
);
375 snprintf(value
, sizeof(value
), "%"PRIx64
, (uint64_t)start_addr
);
376 if (!xs_write(state
->xenstore
, 0, path
, value
, strlen(value
))) {
379 snprintf(path
, sizeof(path
),
380 "/local/domain/0/device-model/%d/physmap/%"PRIx64
"/size",
381 xen_domid
, (uint64_t)phys_offset
);
382 snprintf(value
, sizeof(value
), "%"PRIx64
, (uint64_t)size
);
383 if (!xs_write(state
->xenstore
, 0, path
, value
, strlen(value
))) {
387 snprintf(path
, sizeof(path
),
388 "/local/domain/0/device-model/%d/physmap/%"PRIx64
"/name",
389 xen_domid
, (uint64_t)phys_offset
);
390 if (!xs_write(state
->xenstore
, 0, path
, mr_name
, strlen(mr_name
))) {
398 static int xen_remove_from_physmap(XenIOState
*state
,
404 XenPhysmap
*physmap
= NULL
;
405 hwaddr phys_offset
= 0;
407 physmap
= get_physmapping(state
, start_addr
, size
);
408 if (physmap
== NULL
) {
412 phys_offset
= physmap
->phys_offset
;
413 size
= physmap
->size
;
415 DPRINTF("unmapping vram to %"HWADDR_PRIx
" - %"HWADDR_PRIx
", at "
416 "%"HWADDR_PRIx
"\n", start_addr
, start_addr
+ size
, phys_offset
);
418 size
>>= TARGET_PAGE_BITS
;
419 start_addr
>>= TARGET_PAGE_BITS
;
420 phys_offset
>>= TARGET_PAGE_BITS
;
421 for (i
= 0; i
< size
; i
++) {
422 xen_pfn_t idx
= start_addr
+ i
;
423 xen_pfn_t gpfn
= phys_offset
+ i
;
425 rc
= xc_domain_add_to_physmap(xen_xc
, xen_domid
, XENMAPSPACE_gmfn
, idx
, gpfn
);
427 fprintf(stderr
, "add_to_physmap MFN %"PRI_xen_pfn
" to PFN %"
428 PRI_xen_pfn
" failed: %d\n", idx
, gpfn
, rc
);
433 QLIST_REMOVE(physmap
, list
);
434 if (state
->log_for_dirtybit
== physmap
) {
435 state
->log_for_dirtybit
= NULL
;
443 static int xen_add_to_physmap(XenIOState
*state
,
447 hwaddr offset_within_region
)
452 static int xen_remove_from_physmap(XenIOState
*state
,
460 static void xen_set_memory(struct MemoryListener
*listener
,
461 MemoryRegionSection
*section
,
464 XenIOState
*state
= container_of(listener
, XenIOState
, memory_listener
);
465 hwaddr start_addr
= section
->offset_within_address_space
;
466 ram_addr_t size
= int128_get64(section
->size
);
467 bool log_dirty
= memory_region_is_logging(section
->mr
, DIRTY_MEMORY_VGA
);
468 hvmmem_type_t mem_type
;
470 if (section
->mr
== &ram_memory
) {
474 xen_map_memory_section(xen_xc
, xen_domid
, state
->ioservid
,
477 xen_unmap_memory_section(xen_xc
, xen_domid
, state
->ioservid
,
482 if (!memory_region_is_ram(section
->mr
)) {
486 if (log_dirty
!= add
) {
490 trace_xen_client_set_memory(start_addr
, size
, log_dirty
);
492 start_addr
&= TARGET_PAGE_MASK
;
493 size
= TARGET_PAGE_ALIGN(size
);
496 if (!memory_region_is_rom(section
->mr
)) {
497 xen_add_to_physmap(state
, start_addr
, size
,
498 section
->mr
, section
->offset_within_region
);
500 mem_type
= HVMMEM_ram_ro
;
501 if (xc_hvm_set_mem_type(xen_xc
, xen_domid
, mem_type
,
502 start_addr
>> TARGET_PAGE_BITS
,
503 size
>> TARGET_PAGE_BITS
)) {
504 DPRINTF("xc_hvm_set_mem_type error, addr: "TARGET_FMT_plx
"\n",
509 if (xen_remove_from_physmap(state
, start_addr
, size
) < 0) {
510 DPRINTF("physmapping does not exist at "TARGET_FMT_plx
"\n", start_addr
);
515 static void xen_region_add(MemoryListener
*listener
,
516 MemoryRegionSection
*section
)
518 memory_region_ref(section
->mr
);
519 xen_set_memory(listener
, section
, true);
522 static void xen_region_del(MemoryListener
*listener
,
523 MemoryRegionSection
*section
)
525 xen_set_memory(listener
, section
, false);
526 memory_region_unref(section
->mr
);
529 static void xen_io_add(MemoryListener
*listener
,
530 MemoryRegionSection
*section
)
532 XenIOState
*state
= container_of(listener
, XenIOState
, io_listener
);
534 memory_region_ref(section
->mr
);
536 xen_map_io_section(xen_xc
, xen_domid
, state
->ioservid
, section
);
539 static void xen_io_del(MemoryListener
*listener
,
540 MemoryRegionSection
*section
)
542 XenIOState
*state
= container_of(listener
, XenIOState
, io_listener
);
544 xen_unmap_io_section(xen_xc
, xen_domid
, state
->ioservid
, section
);
546 memory_region_unref(section
->mr
);
549 static void xen_device_realize(DeviceListener
*listener
,
552 XenIOState
*state
= container_of(listener
, XenIOState
, device_listener
);
554 if (object_dynamic_cast(OBJECT(dev
), TYPE_PCI_DEVICE
)) {
555 PCIDevice
*pci_dev
= PCI_DEVICE(dev
);
557 xen_map_pcidev(xen_xc
, xen_domid
, state
->ioservid
, pci_dev
);
561 static void xen_device_unrealize(DeviceListener
*listener
,
564 XenIOState
*state
= container_of(listener
, XenIOState
, device_listener
);
566 if (object_dynamic_cast(OBJECT(dev
), TYPE_PCI_DEVICE
)) {
567 PCIDevice
*pci_dev
= PCI_DEVICE(dev
);
569 xen_unmap_pcidev(xen_xc
, xen_domid
, state
->ioservid
, pci_dev
);
573 static void xen_sync_dirty_bitmap(XenIOState
*state
,
577 hwaddr npages
= size
>> TARGET_PAGE_BITS
;
578 const int width
= sizeof(unsigned long) * 8;
579 unsigned long bitmap
[(npages
+ width
- 1) / width
];
581 const XenPhysmap
*physmap
= NULL
;
583 physmap
= get_physmapping(state
, start_addr
, size
);
584 if (physmap
== NULL
) {
589 if (state
->log_for_dirtybit
== NULL
) {
590 state
->log_for_dirtybit
= physmap
;
591 } else if (state
->log_for_dirtybit
!= physmap
) {
592 /* Only one range for dirty bitmap can be tracked. */
596 rc
= xc_hvm_track_dirty_vram(xen_xc
, xen_domid
,
597 start_addr
>> TARGET_PAGE_BITS
, npages
,
601 #define ENODATA ENOENT
603 if (errno
== ENODATA
) {
604 memory_region_set_dirty(framebuffer
, 0, size
);
605 DPRINTF("xen: track_dirty_vram failed (0x" TARGET_FMT_plx
606 ", 0x" TARGET_FMT_plx
"): %s\n",
607 start_addr
, start_addr
+ size
, strerror(errno
));
612 for (i
= 0; i
< ARRAY_SIZE(bitmap
); i
++) {
613 unsigned long map
= bitmap
[i
];
617 memory_region_set_dirty(framebuffer
,
618 (i
* width
+ j
) * TARGET_PAGE_SIZE
,
624 static void xen_log_start(MemoryListener
*listener
,
625 MemoryRegionSection
*section
,
628 XenIOState
*state
= container_of(listener
, XenIOState
, memory_listener
);
630 if (new & ~old
& (1 << DIRTY_MEMORY_VGA
)) {
631 xen_sync_dirty_bitmap(state
, section
->offset_within_address_space
,
632 int128_get64(section
->size
));
636 static void xen_log_stop(MemoryListener
*listener
, MemoryRegionSection
*section
,
639 XenIOState
*state
= container_of(listener
, XenIOState
, memory_listener
);
641 if (old
& ~new & (1 << DIRTY_MEMORY_VGA
)) {
642 state
->log_for_dirtybit
= NULL
;
643 /* Disable dirty bit tracking */
644 xc_hvm_track_dirty_vram(xen_xc
, xen_domid
, 0, 0, NULL
);
648 static void xen_log_sync(MemoryListener
*listener
, MemoryRegionSection
*section
)
650 XenIOState
*state
= container_of(listener
, XenIOState
, memory_listener
);
652 xen_sync_dirty_bitmap(state
, section
->offset_within_address_space
,
653 int128_get64(section
->size
));
656 static void xen_log_global_start(MemoryListener
*listener
)
659 xen_in_migration
= true;
663 static void xen_log_global_stop(MemoryListener
*listener
)
665 xen_in_migration
= false;
668 static MemoryListener xen_memory_listener
= {
669 .region_add
= xen_region_add
,
670 .region_del
= xen_region_del
,
671 .log_start
= xen_log_start
,
672 .log_stop
= xen_log_stop
,
673 .log_sync
= xen_log_sync
,
674 .log_global_start
= xen_log_global_start
,
675 .log_global_stop
= xen_log_global_stop
,
679 static MemoryListener xen_io_listener
= {
680 .region_add
= xen_io_add
,
681 .region_del
= xen_io_del
,
685 static DeviceListener xen_device_listener
= {
686 .realize
= xen_device_realize
,
687 .unrealize
= xen_device_unrealize
,
690 /* get the ioreq packets from share mem */
691 static ioreq_t
*cpu_get_ioreq_from_shared_memory(XenIOState
*state
, int vcpu
)
693 ioreq_t
*req
= xen_vcpu_ioreq(state
->shared_page
, vcpu
);
695 if (req
->state
!= STATE_IOREQ_READY
) {
696 DPRINTF("I/O request not ready: "
697 "%x, ptr: %x, port: %"PRIx64
", "
698 "data: %"PRIx64
", count: %" FMT_ioreq_size
", size: %" FMT_ioreq_size
"\n",
699 req
->state
, req
->data_is_ptr
, req
->addr
,
700 req
->data
, req
->count
, req
->size
);
704 xen_rmb(); /* see IOREQ_READY /then/ read contents of ioreq */
706 req
->state
= STATE_IOREQ_INPROCESS
;
710 /* use poll to get the port notification */
711 /* ioreq_vec--out,the */
712 /* retval--the number of ioreq packet */
713 static ioreq_t
*cpu_get_ioreq(XenIOState
*state
)
718 port
= xc_evtchn_pending(state
->xce_handle
);
719 if (port
== state
->bufioreq_local_port
) {
720 timer_mod(state
->buffered_io_timer
,
721 BUFFER_IO_MAX_DELAY
+ qemu_clock_get_ms(QEMU_CLOCK_REALTIME
));
726 for (i
= 0; i
< max_cpus
; i
++) {
727 if (state
->ioreq_local_port
[i
] == port
) {
733 hw_error("Fatal error while trying to get io event!\n");
736 /* unmask the wanted port again */
737 xc_evtchn_unmask(state
->xce_handle
, port
);
739 /* get the io packet from shared memory */
740 state
->send_vcpu
= i
;
741 return cpu_get_ioreq_from_shared_memory(state
, i
);
744 /* read error or read nothing */
748 static uint32_t do_inp(pio_addr_t addr
, unsigned long size
)
752 return cpu_inb(addr
);
754 return cpu_inw(addr
);
756 return cpu_inl(addr
);
758 hw_error("inp: bad size: %04"FMT_pioaddr
" %lx", addr
, size
);
762 static void do_outp(pio_addr_t addr
,
763 unsigned long size
, uint32_t val
)
767 return cpu_outb(addr
, val
);
769 return cpu_outw(addr
, val
);
771 return cpu_outl(addr
, val
);
773 hw_error("outp: bad size: %04"FMT_pioaddr
" %lx", addr
, size
);
778 * Helper functions which read/write an object from/to physical guest
779 * memory, as part of the implementation of an ioreq.
782 * cpu_physical_memory_rw(addr + (req->df ? -1 : +1) * req->size * i,
783 * val, req->size, 0/1)
784 * except without the integer overflow problems.
786 static void rw_phys_req_item(hwaddr addr
,
787 ioreq_t
*req
, uint32_t i
, void *val
, int rw
)
789 /* Do everything unsigned so overflow just results in a truncated result
790 * and accesses to undesired parts of guest memory, which is up
792 hwaddr offset
= (hwaddr
)req
->size
* i
;
798 cpu_physical_memory_rw(addr
, val
, req
->size
, rw
);
801 static inline void read_phys_req_item(hwaddr addr
,
802 ioreq_t
*req
, uint32_t i
, void *val
)
804 rw_phys_req_item(addr
, req
, i
, val
, 0);
806 static inline void write_phys_req_item(hwaddr addr
,
807 ioreq_t
*req
, uint32_t i
, void *val
)
809 rw_phys_req_item(addr
, req
, i
, val
, 1);
813 static void cpu_ioreq_pio(ioreq_t
*req
)
817 if (req
->dir
== IOREQ_READ
) {
818 if (!req
->data_is_ptr
) {
819 req
->data
= do_inp(req
->addr
, req
->size
);
823 for (i
= 0; i
< req
->count
; i
++) {
824 tmp
= do_inp(req
->addr
, req
->size
);
825 write_phys_req_item(req
->data
, req
, i
, &tmp
);
828 } else if (req
->dir
== IOREQ_WRITE
) {
829 if (!req
->data_is_ptr
) {
830 do_outp(req
->addr
, req
->size
, req
->data
);
832 for (i
= 0; i
< req
->count
; i
++) {
835 read_phys_req_item(req
->data
, req
, i
, &tmp
);
836 do_outp(req
->addr
, req
->size
, tmp
);
842 static void cpu_ioreq_move(ioreq_t
*req
)
846 if (!req
->data_is_ptr
) {
847 if (req
->dir
== IOREQ_READ
) {
848 for (i
= 0; i
< req
->count
; i
++) {
849 read_phys_req_item(req
->addr
, req
, i
, &req
->data
);
851 } else if (req
->dir
== IOREQ_WRITE
) {
852 for (i
= 0; i
< req
->count
; i
++) {
853 write_phys_req_item(req
->addr
, req
, i
, &req
->data
);
859 if (req
->dir
== IOREQ_READ
) {
860 for (i
= 0; i
< req
->count
; i
++) {
861 read_phys_req_item(req
->addr
, req
, i
, &tmp
);
862 write_phys_req_item(req
->data
, req
, i
, &tmp
);
864 } else if (req
->dir
== IOREQ_WRITE
) {
865 for (i
= 0; i
< req
->count
; i
++) {
866 read_phys_req_item(req
->data
, req
, i
, &tmp
);
867 write_phys_req_item(req
->addr
, req
, i
, &tmp
);
873 static void regs_to_cpu(vmware_regs_t
*vmport_regs
, ioreq_t
*req
)
878 cpu
= X86_CPU(current_cpu
);
880 env
->regs
[R_EAX
] = req
->data
;
881 env
->regs
[R_EBX
] = vmport_regs
->ebx
;
882 env
->regs
[R_ECX
] = vmport_regs
->ecx
;
883 env
->regs
[R_EDX
] = vmport_regs
->edx
;
884 env
->regs
[R_ESI
] = vmport_regs
->esi
;
885 env
->regs
[R_EDI
] = vmport_regs
->edi
;
888 static void regs_from_cpu(vmware_regs_t
*vmport_regs
)
890 X86CPU
*cpu
= X86_CPU(current_cpu
);
891 CPUX86State
*env
= &cpu
->env
;
893 vmport_regs
->ebx
= env
->regs
[R_EBX
];
894 vmport_regs
->ecx
= env
->regs
[R_ECX
];
895 vmport_regs
->edx
= env
->regs
[R_EDX
];
896 vmport_regs
->esi
= env
->regs
[R_ESI
];
897 vmport_regs
->edi
= env
->regs
[R_EDI
];
900 static void handle_vmport_ioreq(XenIOState
*state
, ioreq_t
*req
)
902 vmware_regs_t
*vmport_regs
;
904 assert(state
->shared_vmport_page
);
906 &state
->shared_vmport_page
->vcpu_vmport_regs
[state
->send_vcpu
];
907 QEMU_BUILD_BUG_ON(sizeof(*req
) < sizeof(*vmport_regs
));
909 current_cpu
= state
->cpu_by_vcpu_id
[state
->send_vcpu
];
910 regs_to_cpu(vmport_regs
, req
);
912 regs_from_cpu(vmport_regs
);
916 static void handle_ioreq(XenIOState
*state
, ioreq_t
*req
)
918 if (!req
->data_is_ptr
&& (req
->dir
== IOREQ_WRITE
) &&
919 (req
->size
< sizeof (target_ulong
))) {
920 req
->data
&= ((target_ulong
) 1 << (8 * req
->size
)) - 1;
927 case IOREQ_TYPE_COPY
:
930 case IOREQ_TYPE_VMWARE_PORT
:
931 handle_vmport_ioreq(state
, req
);
933 case IOREQ_TYPE_TIMEOFFSET
:
935 case IOREQ_TYPE_INVALIDATE
:
936 xen_invalidate_map_cache();
938 case IOREQ_TYPE_PCI_CONFIG
: {
939 uint32_t sbdf
= req
->addr
>> 32;
942 /* Fake a write to port 0xCF8 so that
943 * the config space access will target the
944 * correct device model.
947 ((req
->addr
& 0x0f00) << 16) |
948 ((sbdf
& 0xffff) << 8) |
950 do_outp(0xcf8, 4, val
);
952 /* Now issue the config space access via
955 req
->addr
= 0xcfc | (req
->addr
& 0x03);
960 hw_error("Invalid ioreq type 0x%x\n", req
->type
);
964 static int handle_buffered_iopage(XenIOState
*state
)
966 buf_ioreq_t
*buf_req
= NULL
;
970 if (!state
->buffered_io_page
) {
974 memset(&req
, 0x00, sizeof(req
));
976 while (state
->buffered_io_page
->read_pointer
!= state
->buffered_io_page
->write_pointer
) {
977 buf_req
= &state
->buffered_io_page
->buf_ioreq
[
978 state
->buffered_io_page
->read_pointer
% IOREQ_BUFFER_SLOT_NUM
];
979 req
.size
= 1UL << buf_req
->size
;
981 req
.addr
= buf_req
->addr
;
982 req
.data
= buf_req
->data
;
983 req
.state
= STATE_IOREQ_READY
;
984 req
.dir
= buf_req
->dir
;
986 req
.type
= buf_req
->type
;
988 qw
= (req
.size
== 8);
990 buf_req
= &state
->buffered_io_page
->buf_ioreq
[
991 (state
->buffered_io_page
->read_pointer
+ 1) % IOREQ_BUFFER_SLOT_NUM
];
992 req
.data
|= ((uint64_t)buf_req
->data
) << 32;
995 handle_ioreq(state
, &req
);
998 state
->buffered_io_page
->read_pointer
+= qw
? 2 : 1;
1004 static void handle_buffered_io(void *opaque
)
1006 XenIOState
*state
= opaque
;
1008 if (handle_buffered_iopage(state
)) {
1009 timer_mod(state
->buffered_io_timer
,
1010 BUFFER_IO_MAX_DELAY
+ qemu_clock_get_ms(QEMU_CLOCK_REALTIME
));
1012 timer_del(state
->buffered_io_timer
);
1013 xc_evtchn_unmask(state
->xce_handle
, state
->bufioreq_local_port
);
1017 static void cpu_handle_ioreq(void *opaque
)
1019 XenIOState
*state
= opaque
;
1020 ioreq_t
*req
= cpu_get_ioreq(state
);
1022 handle_buffered_iopage(state
);
1024 handle_ioreq(state
, req
);
1026 if (req
->state
!= STATE_IOREQ_INPROCESS
) {
1027 fprintf(stderr
, "Badness in I/O request ... not in service?!: "
1028 "%x, ptr: %x, port: %"PRIx64
", "
1029 "data: %"PRIx64
", count: %" FMT_ioreq_size
1030 ", size: %" FMT_ioreq_size
1031 ", type: %"FMT_ioreq_size
"\n",
1032 req
->state
, req
->data_is_ptr
, req
->addr
,
1033 req
->data
, req
->count
, req
->size
, req
->type
);
1034 destroy_hvm_domain(false);
1038 xen_wmb(); /* Update ioreq contents /then/ update state. */
1041 * We do this before we send the response so that the tools
1042 * have the opportunity to pick up on the reset before the
1043 * guest resumes and does a hlt with interrupts disabled which
1044 * causes Xen to powerdown the domain.
1046 if (runstate_is_running()) {
1047 if (qemu_shutdown_requested_get()) {
1048 destroy_hvm_domain(false);
1050 if (qemu_reset_requested_get()) {
1051 qemu_system_reset(VMRESET_REPORT
);
1052 destroy_hvm_domain(true);
1056 req
->state
= STATE_IORESP_READY
;
1057 xc_evtchn_notify(state
->xce_handle
, state
->ioreq_local_port
[state
->send_vcpu
]);
1061 static void xen_main_loop_prepare(XenIOState
*state
)
1065 if (state
->xce_handle
!= XC_HANDLER_INITIAL_VALUE
) {
1066 evtchn_fd
= xc_evtchn_fd(state
->xce_handle
);
1069 state
->buffered_io_timer
= timer_new_ms(QEMU_CLOCK_REALTIME
, handle_buffered_io
,
1072 if (evtchn_fd
!= -1) {
1073 CPUState
*cpu_state
;
1075 DPRINTF("%s: Init cpu_by_vcpu_id\n", __func__
);
1076 CPU_FOREACH(cpu_state
) {
1077 DPRINTF("%s: cpu_by_vcpu_id[%d]=%p\n",
1078 __func__
, cpu_state
->cpu_index
, cpu_state
);
1079 state
->cpu_by_vcpu_id
[cpu_state
->cpu_index
] = cpu_state
;
1081 qemu_set_fd_handler(evtchn_fd
, cpu_handle_ioreq
, NULL
, state
);
1086 static void xen_hvm_change_state_handler(void *opaque
, int running
,
1089 XenIOState
*state
= opaque
;
1092 xen_main_loop_prepare(state
);
1095 xen_set_ioreq_server_state(xen_xc
, xen_domid
,
1097 (rstate
== RUN_STATE_RUNNING
));
1100 static void xen_exit_notifier(Notifier
*n
, void *data
)
1102 XenIOState
*state
= container_of(n
, XenIOState
, exit
);
1104 xc_evtchn_close(state
->xce_handle
);
1105 xs_daemon_close(state
->xenstore
);
1108 static void xen_read_physmap(XenIOState
*state
)
1110 XenPhysmap
*physmap
= NULL
;
1111 unsigned int len
, num
, i
;
1112 char path
[80], *value
= NULL
;
1113 char **entries
= NULL
;
1115 snprintf(path
, sizeof(path
),
1116 "/local/domain/0/device-model/%d/physmap", xen_domid
);
1117 entries
= xs_directory(state
->xenstore
, 0, path
, &num
);
1118 if (entries
== NULL
)
1121 for (i
= 0; i
< num
; i
++) {
1122 physmap
= g_malloc(sizeof (XenPhysmap
));
1123 physmap
->phys_offset
= strtoull(entries
[i
], NULL
, 16);
1124 snprintf(path
, sizeof(path
),
1125 "/local/domain/0/device-model/%d/physmap/%s/start_addr",
1126 xen_domid
, entries
[i
]);
1127 value
= xs_read(state
->xenstore
, 0, path
, &len
);
1128 if (value
== NULL
) {
1132 physmap
->start_addr
= strtoull(value
, NULL
, 16);
1135 snprintf(path
, sizeof(path
),
1136 "/local/domain/0/device-model/%d/physmap/%s/size",
1137 xen_domid
, entries
[i
]);
1138 value
= xs_read(state
->xenstore
, 0, path
, &len
);
1139 if (value
== NULL
) {
1143 physmap
->size
= strtoull(value
, NULL
, 16);
1146 snprintf(path
, sizeof(path
),
1147 "/local/domain/0/device-model/%d/physmap/%s/name",
1148 xen_domid
, entries
[i
]);
1149 physmap
->name
= xs_read(state
->xenstore
, 0, path
, &len
);
1151 QLIST_INSERT_HEAD(&state
->physmap
, physmap
, list
);
1156 static void xen_wakeup_notifier(Notifier
*notifier
, void *data
)
1158 xc_set_hvm_param(xen_xc
, xen_domid
, HVM_PARAM_ACPI_S_STATE
, 0);
1161 /* return 0 means OK, or -1 means critical issue -- will exit(1) */
1162 int xen_hvm_init(ram_addr_t
*below_4g_mem_size
, ram_addr_t
*above_4g_mem_size
,
1163 MemoryRegion
**ram_memory
)
1166 xen_pfn_t ioreq_pfn
;
1167 xen_pfn_t bufioreq_pfn
;
1168 evtchn_port_t bufioreq_evtchn
;
1171 state
= g_malloc0(sizeof (XenIOState
));
1173 state
->xce_handle
= xen_xc_evtchn_open(NULL
, 0);
1174 if (state
->xce_handle
== XC_HANDLER_INITIAL_VALUE
) {
1175 perror("xen: event channel open");
1179 state
->xenstore
= xs_daemon_open();
1180 if (state
->xenstore
== NULL
) {
1181 perror("xen: xenstore open");
1185 rc
= xen_create_ioreq_server(xen_xc
, xen_domid
, &state
->ioservid
);
1187 perror("xen: ioreq server create");
1191 state
->exit
.notify
= xen_exit_notifier
;
1192 qemu_add_exit_notifier(&state
->exit
);
1194 state
->suspend
.notify
= xen_suspend_notifier
;
1195 qemu_register_suspend_notifier(&state
->suspend
);
1197 state
->wakeup
.notify
= xen_wakeup_notifier
;
1198 qemu_register_wakeup_notifier(&state
->wakeup
);
1200 rc
= xen_get_ioreq_server_info(xen_xc
, xen_domid
, state
->ioservid
,
1201 &ioreq_pfn
, &bufioreq_pfn
,
1204 hw_error("failed to get ioreq server info: error %d handle=" XC_INTERFACE_FMT
,
1208 DPRINTF("shared page at pfn %lx\n", ioreq_pfn
);
1209 DPRINTF("buffered io page at pfn %lx\n", bufioreq_pfn
);
1210 DPRINTF("buffered io evtchn is %x\n", bufioreq_evtchn
);
1212 state
->shared_page
= xc_map_foreign_range(xen_xc
, xen_domid
, XC_PAGE_SIZE
,
1213 PROT_READ
|PROT_WRITE
, ioreq_pfn
);
1214 if (state
->shared_page
== NULL
) {
1215 hw_error("map shared IO page returned error %d handle=" XC_INTERFACE_FMT
,
1219 rc
= xen_get_vmport_regs_pfn(xen_xc
, xen_domid
, &ioreq_pfn
);
1221 DPRINTF("shared vmport page at pfn %lx\n", ioreq_pfn
);
1222 state
->shared_vmport_page
=
1223 xc_map_foreign_range(xen_xc
, xen_domid
, XC_PAGE_SIZE
,
1224 PROT_READ
|PROT_WRITE
, ioreq_pfn
);
1225 if (state
->shared_vmport_page
== NULL
) {
1226 hw_error("map shared vmport IO page returned error %d handle="
1227 XC_INTERFACE_FMT
, errno
, xen_xc
);
1229 } else if (rc
!= -ENOSYS
) {
1230 hw_error("get vmport regs pfn returned error %d, rc=%d", errno
, rc
);
1233 state
->buffered_io_page
= xc_map_foreign_range(xen_xc
, xen_domid
,
1235 PROT_READ
|PROT_WRITE
,
1237 if (state
->buffered_io_page
== NULL
) {
1238 hw_error("map buffered IO page returned error %d", errno
);
1241 /* Note: cpus is empty at this point in init */
1242 state
->cpu_by_vcpu_id
= g_malloc0(max_cpus
* sizeof(CPUState
*));
1244 rc
= xen_set_ioreq_server_state(xen_xc
, xen_domid
, state
->ioservid
, true);
1246 hw_error("failed to enable ioreq server info: error %d handle=" XC_INTERFACE_FMT
,
1250 state
->ioreq_local_port
= g_malloc0(max_cpus
* sizeof (evtchn_port_t
));
1252 /* FIXME: how about if we overflow the page here? */
1253 for (i
= 0; i
< max_cpus
; i
++) {
1254 rc
= xc_evtchn_bind_interdomain(state
->xce_handle
, xen_domid
,
1255 xen_vcpu_eport(state
->shared_page
, i
));
1257 fprintf(stderr
, "shared evtchn %d bind error %d\n", i
, errno
);
1260 state
->ioreq_local_port
[i
] = rc
;
1263 rc
= xc_evtchn_bind_interdomain(state
->xce_handle
, xen_domid
,
1266 fprintf(stderr
, "buffered evtchn bind error %d\n", errno
);
1269 state
->bufioreq_local_port
= rc
;
1271 /* Init RAM management */
1272 xen_map_cache_init(xen_phys_offset_to_gaddr
, state
);
1273 xen_ram_init(below_4g_mem_size
, above_4g_mem_size
, ram_size
, ram_memory
);
1275 qemu_add_vm_change_state_handler(xen_hvm_change_state_handler
, state
);
1277 state
->memory_listener
= xen_memory_listener
;
1278 QLIST_INIT(&state
->physmap
);
1279 memory_listener_register(&state
->memory_listener
, &address_space_memory
);
1280 state
->log_for_dirtybit
= NULL
;
1282 state
->io_listener
= xen_io_listener
;
1283 memory_listener_register(&state
->io_listener
, &address_space_io
);
1285 state
->device_listener
= xen_device_listener
;
1286 device_listener_register(&state
->device_listener
);
1288 /* Initialize backend core & drivers */
1289 if (xen_be_init() != 0) {
1290 fprintf(stderr
, "%s: xen backend core setup failed\n", __FUNCTION__
);
1293 xen_be_register("console", &xen_console_ops
);
1294 xen_be_register("vkbd", &xen_kbdmouse_ops
);
1295 xen_be_register("qdisk", &xen_blkdev_ops
);
1296 xen_read_physmap(state
);
1301 void destroy_hvm_domain(bool reboot
)
1306 xc_handle
= xen_xc_interface_open(0, 0, 0);
1307 if (xc_handle
== XC_HANDLER_INITIAL_VALUE
) {
1308 fprintf(stderr
, "Cannot acquire xenctrl handle\n");
1310 sts
= xc_domain_shutdown(xc_handle
, xen_domid
,
1311 reboot
? SHUTDOWN_reboot
: SHUTDOWN_poweroff
);
1313 fprintf(stderr
, "xc_domain_shutdown failed to issue %s, "
1314 "sts %d, %s\n", reboot
? "reboot" : "poweroff",
1315 sts
, strerror(errno
));
1317 fprintf(stderr
, "Issued domain %d %s\n", xen_domid
,
1318 reboot
? "reboot" : "poweroff");
1320 xc_interface_close(xc_handle
);
1324 void xen_register_framebuffer(MemoryRegion
*mr
)
1329 void xen_shutdown_fatal_error(const char *fmt
, ...)
1334 vfprintf(stderr
, fmt
, ap
);
1336 fprintf(stderr
, "Will destroy the domain.\n");
1337 /* destroy the domain */
1338 qemu_system_shutdown_request();
1341 void xen_modified_memory(ram_addr_t start
, ram_addr_t length
)
1343 if (unlikely(xen_in_migration
)) {
1345 ram_addr_t start_pfn
, nb_pages
;
1348 length
= TARGET_PAGE_SIZE
;
1350 start_pfn
= start
>> TARGET_PAGE_BITS
;
1351 nb_pages
= ((start
+ length
+ TARGET_PAGE_SIZE
- 1) >> TARGET_PAGE_BITS
)
1353 rc
= xc_hvm_modified_memory(xen_xc
, xen_domid
, start_pfn
, nb_pages
);
1356 "%s failed for "RAM_ADDR_FMT
" ("RAM_ADDR_FMT
"): %i, %s\n",
1357 __func__
, start
, nb_pages
, rc
, strerror(-rc
));
1362 void qmp_xen_set_global_dirty_log(bool enable
, Error
**errp
)
1365 memory_global_dirty_log_start();
1367 memory_global_dirty_log_stop();