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.
11 #include "qemu/osdep.h"
14 #include "hw/pci/pci.h"
15 #include "hw/i386/pc.h"
16 #include "hw/i386/apic-msidef.h"
17 #include "hw/xen/xen_common.h"
18 #include "hw/xen/xen_backend.h"
19 #include "qapi/error.h"
20 #include "qapi/qapi-commands-misc.h"
21 #include "qemu/error-report.h"
22 #include "qemu/range.h"
23 #include "sysemu/xen-mapcache.h"
25 #include "exec/address-spaces.h"
27 #include <xen/hvm/ioreq.h>
28 #include <xen/hvm/params.h>
29 #include <xen/hvm/e820.h>
31 //#define DEBUG_XEN_HVM
34 #define DPRINTF(fmt, ...) \
35 do { fprintf(stderr, "xen: " fmt, ## __VA_ARGS__); } while (0)
37 #define DPRINTF(fmt, ...) \
41 static MemoryRegion ram_memory
, ram_640k
, ram_lo
, ram_hi
;
42 static MemoryRegion
*framebuffer
;
43 static bool xen_in_migration
;
45 /* Compatibility with older version */
47 /* This allows QEMU to build on a system that has Xen 4.5 or earlier
48 * installed. This here (not in hw/xen/xen_common.h) because xen/hvm/ioreq.h
49 * needs to be included before this block and hw/xen/xen_common.h needs to
50 * be included before xen/hvm/ioreq.h
52 #ifndef IOREQ_TYPE_VMWARE_PORT
53 #define IOREQ_TYPE_VMWARE_PORT 3
61 typedef struct vmware_regs vmware_regs_t
;
63 struct shared_vmport_iopage
{
64 struct vmware_regs vcpu_vmport_regs
[1];
66 typedef struct shared_vmport_iopage shared_vmport_iopage_t
;
69 static inline uint32_t xen_vcpu_eport(shared_iopage_t
*shared_page
, int i
)
71 return shared_page
->vcpu_ioreq
[i
].vp_eport
;
73 static inline ioreq_t
*xen_vcpu_ioreq(shared_iopage_t
*shared_page
, int vcpu
)
75 return &shared_page
->vcpu_ioreq
[vcpu
];
78 #define BUFFER_IO_MAX_DELAY 100
80 typedef struct XenPhysmap
{
86 QLIST_ENTRY(XenPhysmap
) list
;
89 static QLIST_HEAD(, XenPhysmap
) xen_physmap
;
91 typedef struct XenIOState
{
93 shared_iopage_t
*shared_page
;
94 shared_vmport_iopage_t
*shared_vmport_page
;
95 buffered_iopage_t
*buffered_io_page
;
96 QEMUTimer
*buffered_io_timer
;
97 CPUState
**cpu_by_vcpu_id
;
98 /* the evtchn port for polling the notification, */
99 evtchn_port_t
*ioreq_local_port
;
100 /* evtchn remote and local ports for buffered io */
101 evtchn_port_t bufioreq_remote_port
;
102 evtchn_port_t bufioreq_local_port
;
103 /* the evtchn fd for polling */
104 xenevtchn_handle
*xce_handle
;
105 /* which vcpu we are serving */
108 struct xs_handle
*xenstore
;
109 MemoryListener memory_listener
;
110 MemoryListener io_listener
;
111 DeviceListener device_listener
;
112 hwaddr free_phys_offset
;
113 const XenPhysmap
*log_for_dirtybit
;
120 /* Xen specific function for piix pci */
122 int xen_pci_slot_get_pirq(PCIDevice
*pci_dev
, int irq_num
)
124 return irq_num
+ ((pci_dev
->devfn
>> 3) << 2);
127 void xen_piix3_set_irq(void *opaque
, int irq_num
, int level
)
129 xen_set_pci_intx_level(xen_domid
, 0, 0, irq_num
>> 2,
133 void xen_piix_pci_write_config_client(uint32_t address
, uint32_t val
, int len
)
137 /* Scan for updates to PCI link routes (0x60-0x63). */
138 for (i
= 0; i
< len
; i
++) {
139 uint8_t v
= (val
>> (8 * i
)) & 0xff;
144 if (((address
+ i
) >= 0x60) && ((address
+ i
) <= 0x63)) {
145 xen_set_pci_link_route(xen_domid
, address
+ i
- 0x60, v
);
150 int xen_is_pirq_msi(uint32_t msi_data
)
152 /* If vector is 0, the msi is remapped into a pirq, passed as
155 return ((msi_data
& MSI_DATA_VECTOR_MASK
) >> MSI_DATA_VECTOR_SHIFT
) == 0;
158 void xen_hvm_inject_msi(uint64_t addr
, uint32_t data
)
160 xen_inject_msi(xen_domid
, addr
, data
);
163 static void xen_suspend_notifier(Notifier
*notifier
, void *data
)
165 xc_set_hvm_param(xen_xc
, xen_domid
, HVM_PARAM_ACPI_S_STATE
, 3);
168 /* Xen Interrupt Controller */
170 static void xen_set_irq(void *opaque
, int irq
, int level
)
172 xen_set_isa_irq_level(xen_domid
, irq
, level
);
175 qemu_irq
*xen_interrupt_controller_init(void)
177 return qemu_allocate_irqs(xen_set_irq
, NULL
, 16);
182 static void xen_ram_init(PCMachineState
*pcms
,
183 ram_addr_t ram_size
, MemoryRegion
**ram_memory_p
)
185 MemoryRegion
*sysmem
= get_system_memory();
186 ram_addr_t block_len
;
187 uint64_t user_lowmem
= object_property_get_uint(qdev_get_machine(),
188 PC_MACHINE_MAX_RAM_BELOW_4G
,
191 /* Handle the machine opt max-ram-below-4g. It is basically doing
192 * min(xen limit, user limit).
195 user_lowmem
= HVM_BELOW_4G_RAM_END
; /* default */
197 if (HVM_BELOW_4G_RAM_END
<= user_lowmem
) {
198 user_lowmem
= HVM_BELOW_4G_RAM_END
;
201 if (ram_size
>= user_lowmem
) {
202 pcms
->above_4g_mem_size
= ram_size
- user_lowmem
;
203 pcms
->below_4g_mem_size
= user_lowmem
;
205 pcms
->above_4g_mem_size
= 0;
206 pcms
->below_4g_mem_size
= ram_size
;
208 if (!pcms
->above_4g_mem_size
) {
209 block_len
= ram_size
;
212 * Xen does not allocate the memory continuously, it keeps a
213 * hole of the size computed above or passed in.
215 block_len
= (1ULL << 32) + pcms
->above_4g_mem_size
;
217 memory_region_init_ram(&ram_memory
, NULL
, "xen.ram", block_len
,
219 *ram_memory_p
= &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 pcms
->below_4g_mem_size
- 0xc0000);
233 memory_region_add_subregion(sysmem
, 0xc0000, &ram_lo
);
234 if (pcms
->above_4g_mem_size
> 0) {
235 memory_region_init_alias(&ram_hi
, NULL
, "xen.ram.hi",
236 &ram_memory
, 0x100000000ULL
,
237 pcms
->above_4g_mem_size
);
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
,
245 unsigned long nr_pfn
;
249 if (runstate_check(RUN_STATE_INMIGRATE
)) {
250 /* RAM already populated in Xen */
251 fprintf(stderr
, "%s: do not alloc "RAM_ADDR_FMT
252 " bytes of ram at "RAM_ADDR_FMT
" when runstate is INMIGRATE\n",
253 __func__
, size
, ram_addr
);
257 if (mr
== &ram_memory
) {
261 trace_xen_ram_alloc(ram_addr
, size
);
263 nr_pfn
= size
>> TARGET_PAGE_BITS
;
264 pfn_list
= g_malloc(sizeof (*pfn_list
) * nr_pfn
);
266 for (i
= 0; i
< nr_pfn
; i
++) {
267 pfn_list
[i
] = (ram_addr
>> TARGET_PAGE_BITS
) + i
;
270 if (xc_domain_populate_physmap_exact(xen_xc
, xen_domid
, nr_pfn
, 0, 0, pfn_list
)) {
271 error_setg(errp
, "xen: failed to populate ram at " RAM_ADDR_FMT
,
278 static XenPhysmap
*get_physmapping(hwaddr start_addr
, ram_addr_t size
)
280 XenPhysmap
*physmap
= NULL
;
282 start_addr
&= TARGET_PAGE_MASK
;
284 QLIST_FOREACH(physmap
, &xen_physmap
, list
) {
285 if (range_covers_byte(physmap
->start_addr
, physmap
->size
, start_addr
)) {
292 static hwaddr
xen_phys_offset_to_gaddr(hwaddr phys_offset
, ram_addr_t size
)
294 hwaddr addr
= phys_offset
& TARGET_PAGE_MASK
;
295 XenPhysmap
*physmap
= NULL
;
297 QLIST_FOREACH(physmap
, &xen_physmap
, list
) {
298 if (range_covers_byte(physmap
->phys_offset
, physmap
->size
, addr
)) {
299 return physmap
->start_addr
+ (phys_offset
- physmap
->phys_offset
);
306 #ifdef XEN_COMPAT_PHYSMAP
307 static int xen_save_physmap(XenIOState
*state
, XenPhysmap
*physmap
)
309 char path
[80], value
[17];
311 snprintf(path
, sizeof(path
),
312 "/local/domain/0/device-model/%d/physmap/%"PRIx64
"/start_addr",
313 xen_domid
, (uint64_t)physmap
->phys_offset
);
314 snprintf(value
, sizeof(value
), "%"PRIx64
, (uint64_t)physmap
->start_addr
);
315 if (!xs_write(state
->xenstore
, 0, path
, value
, strlen(value
))) {
318 snprintf(path
, sizeof(path
),
319 "/local/domain/0/device-model/%d/physmap/%"PRIx64
"/size",
320 xen_domid
, (uint64_t)physmap
->phys_offset
);
321 snprintf(value
, sizeof(value
), "%"PRIx64
, (uint64_t)physmap
->size
);
322 if (!xs_write(state
->xenstore
, 0, path
, value
, strlen(value
))) {
326 snprintf(path
, sizeof(path
),
327 "/local/domain/0/device-model/%d/physmap/%"PRIx64
"/name",
328 xen_domid
, (uint64_t)physmap
->phys_offset
);
329 if (!xs_write(state
->xenstore
, 0, path
,
330 physmap
->name
, strlen(physmap
->name
))) {
337 static int xen_save_physmap(XenIOState
*state
, XenPhysmap
*physmap
)
343 static int xen_add_to_physmap(XenIOState
*state
,
347 hwaddr offset_within_region
)
349 unsigned long nr_pages
;
351 XenPhysmap
*physmap
= NULL
;
352 hwaddr pfn
, start_gpfn
;
353 hwaddr phys_offset
= memory_region_get_ram_addr(mr
);
356 if (get_physmapping(start_addr
, size
)) {
363 /* Xen can only handle a single dirty log region for now and we want
364 * the linear framebuffer to be that region.
365 * Avoid tracking any regions that is not videoram and avoid tracking
366 * the legacy vga region. */
367 if (mr
== framebuffer
&& start_addr
> 0xbffff) {
373 DPRINTF("mapping vram to %"HWADDR_PRIx
" - %"HWADDR_PRIx
"\n",
374 start_addr
, start_addr
+ size
);
376 mr_name
= memory_region_name(mr
);
378 physmap
= g_malloc(sizeof(XenPhysmap
));
380 physmap
->start_addr
= start_addr
;
381 physmap
->size
= size
;
382 physmap
->name
= mr_name
;
383 physmap
->phys_offset
= phys_offset
;
385 QLIST_INSERT_HEAD(&xen_physmap
, physmap
, list
);
387 if (runstate_check(RUN_STATE_INMIGRATE
)) {
388 /* Now when we have a physmap entry we can replace a dummy mapping with
389 * a real one of guest foreign memory. */
390 uint8_t *p
= xen_replace_cache_entry(phys_offset
, start_addr
, size
);
391 assert(p
&& p
== memory_region_get_ram_ptr(mr
));
396 pfn
= phys_offset
>> TARGET_PAGE_BITS
;
397 start_gpfn
= start_addr
>> TARGET_PAGE_BITS
;
398 nr_pages
= size
>> TARGET_PAGE_BITS
;
399 rc
= xendevicemodel_relocate_memory(xen_dmod
, xen_domid
, nr_pages
, pfn
,
402 int saved_errno
= errno
;
404 error_report("relocate_memory %lu pages from GFN %"HWADDR_PRIx
405 " to GFN %"HWADDR_PRIx
" failed: %s",
406 nr_pages
, pfn
, start_gpfn
, strerror(saved_errno
));
411 rc
= xendevicemodel_pin_memory_cacheattr(xen_dmod
, xen_domid
,
412 start_addr
>> TARGET_PAGE_BITS
,
413 (start_addr
+ size
- 1) >> TARGET_PAGE_BITS
,
414 XEN_DOMCTL_MEM_CACHEATTR_WB
);
416 error_report("pin_memory_cacheattr failed: %s", strerror(errno
));
418 return xen_save_physmap(state
, physmap
);
421 static int xen_remove_from_physmap(XenIOState
*state
,
426 XenPhysmap
*physmap
= NULL
;
427 hwaddr phys_offset
= 0;
429 physmap
= get_physmapping(start_addr
, size
);
430 if (physmap
== NULL
) {
434 phys_offset
= physmap
->phys_offset
;
435 size
= physmap
->size
;
437 DPRINTF("unmapping vram to %"HWADDR_PRIx
" - %"HWADDR_PRIx
", at "
438 "%"HWADDR_PRIx
"\n", start_addr
, start_addr
+ size
, phys_offset
);
440 size
>>= TARGET_PAGE_BITS
;
441 start_addr
>>= TARGET_PAGE_BITS
;
442 phys_offset
>>= TARGET_PAGE_BITS
;
443 rc
= xendevicemodel_relocate_memory(xen_dmod
, xen_domid
, size
, start_addr
,
446 int saved_errno
= errno
;
448 error_report("relocate_memory "RAM_ADDR_FMT
" pages"
449 " from GFN %"HWADDR_PRIx
450 " to GFN %"HWADDR_PRIx
" failed: %s",
451 size
, start_addr
, phys_offset
, strerror(saved_errno
));
456 QLIST_REMOVE(physmap
, list
);
457 if (state
->log_for_dirtybit
== physmap
) {
458 state
->log_for_dirtybit
= NULL
;
465 static void xen_set_memory(struct MemoryListener
*listener
,
466 MemoryRegionSection
*section
,
469 XenIOState
*state
= container_of(listener
, XenIOState
, memory_listener
);
470 hwaddr start_addr
= section
->offset_within_address_space
;
471 ram_addr_t size
= int128_get64(section
->size
);
472 bool log_dirty
= memory_region_is_logging(section
->mr
, DIRTY_MEMORY_VGA
);
473 hvmmem_type_t mem_type
;
475 if (section
->mr
== &ram_memory
) {
479 xen_map_memory_section(xen_domid
, state
->ioservid
,
482 xen_unmap_memory_section(xen_domid
, state
->ioservid
,
487 if (!memory_region_is_ram(section
->mr
)) {
491 if (log_dirty
!= add
) {
495 trace_xen_client_set_memory(start_addr
, size
, log_dirty
);
497 start_addr
&= TARGET_PAGE_MASK
;
498 size
= TARGET_PAGE_ALIGN(size
);
501 if (!memory_region_is_rom(section
->mr
)) {
502 xen_add_to_physmap(state
, start_addr
, size
,
503 section
->mr
, section
->offset_within_region
);
505 mem_type
= HVMMEM_ram_ro
;
506 if (xen_set_mem_type(xen_domid
, mem_type
,
507 start_addr
>> TARGET_PAGE_BITS
,
508 size
>> TARGET_PAGE_BITS
)) {
509 DPRINTF("xen_set_mem_type error, addr: "TARGET_FMT_plx
"\n",
514 if (xen_remove_from_physmap(state
, start_addr
, size
) < 0) {
515 DPRINTF("physmapping does not exist at "TARGET_FMT_plx
"\n", start_addr
);
520 static void xen_region_add(MemoryListener
*listener
,
521 MemoryRegionSection
*section
)
523 memory_region_ref(section
->mr
);
524 xen_set_memory(listener
, section
, true);
527 static void xen_region_del(MemoryListener
*listener
,
528 MemoryRegionSection
*section
)
530 xen_set_memory(listener
, section
, false);
531 memory_region_unref(section
->mr
);
534 static void xen_io_add(MemoryListener
*listener
,
535 MemoryRegionSection
*section
)
537 XenIOState
*state
= container_of(listener
, XenIOState
, io_listener
);
538 MemoryRegion
*mr
= section
->mr
;
540 if (mr
->ops
== &unassigned_io_ops
) {
544 memory_region_ref(mr
);
546 xen_map_io_section(xen_domid
, state
->ioservid
, section
);
549 static void xen_io_del(MemoryListener
*listener
,
550 MemoryRegionSection
*section
)
552 XenIOState
*state
= container_of(listener
, XenIOState
, io_listener
);
553 MemoryRegion
*mr
= section
->mr
;
555 if (mr
->ops
== &unassigned_io_ops
) {
559 xen_unmap_io_section(xen_domid
, state
->ioservid
, section
);
561 memory_region_unref(mr
);
564 static void xen_device_realize(DeviceListener
*listener
,
567 XenIOState
*state
= container_of(listener
, XenIOState
, device_listener
);
569 if (object_dynamic_cast(OBJECT(dev
), TYPE_PCI_DEVICE
)) {
570 PCIDevice
*pci_dev
= PCI_DEVICE(dev
);
572 xen_map_pcidev(xen_domid
, state
->ioservid
, pci_dev
);
576 static void xen_device_unrealize(DeviceListener
*listener
,
579 XenIOState
*state
= container_of(listener
, XenIOState
, device_listener
);
581 if (object_dynamic_cast(OBJECT(dev
), TYPE_PCI_DEVICE
)) {
582 PCIDevice
*pci_dev
= PCI_DEVICE(dev
);
584 xen_unmap_pcidev(xen_domid
, state
->ioservid
, pci_dev
);
588 static void xen_sync_dirty_bitmap(XenIOState
*state
,
592 hwaddr npages
= size
>> TARGET_PAGE_BITS
;
593 const int width
= sizeof(unsigned long) * 8;
594 unsigned long bitmap
[DIV_ROUND_UP(npages
, width
)];
596 const XenPhysmap
*physmap
= NULL
;
598 physmap
= get_physmapping(start_addr
, size
);
599 if (physmap
== NULL
) {
604 if (state
->log_for_dirtybit
== NULL
) {
605 state
->log_for_dirtybit
= physmap
;
606 } else if (state
->log_for_dirtybit
!= physmap
) {
607 /* Only one range for dirty bitmap can be tracked. */
611 rc
= xen_track_dirty_vram(xen_domid
, start_addr
>> TARGET_PAGE_BITS
,
615 #define ENODATA ENOENT
617 if (errno
== ENODATA
) {
618 memory_region_set_dirty(framebuffer
, 0, size
);
619 DPRINTF("xen: track_dirty_vram failed (0x" TARGET_FMT_plx
620 ", 0x" TARGET_FMT_plx
"): %s\n",
621 start_addr
, start_addr
+ size
, strerror(errno
));
626 for (i
= 0; i
< ARRAY_SIZE(bitmap
); i
++) {
627 unsigned long map
= bitmap
[i
];
631 memory_region_set_dirty(framebuffer
,
632 (i
* width
+ j
) * TARGET_PAGE_SIZE
,
638 static void xen_log_start(MemoryListener
*listener
,
639 MemoryRegionSection
*section
,
642 XenIOState
*state
= container_of(listener
, XenIOState
, memory_listener
);
644 if (new & ~old
& (1 << DIRTY_MEMORY_VGA
)) {
645 xen_sync_dirty_bitmap(state
, section
->offset_within_address_space
,
646 int128_get64(section
->size
));
650 static void xen_log_stop(MemoryListener
*listener
, MemoryRegionSection
*section
,
653 XenIOState
*state
= container_of(listener
, XenIOState
, memory_listener
);
655 if (old
& ~new & (1 << DIRTY_MEMORY_VGA
)) {
656 state
->log_for_dirtybit
= NULL
;
657 /* Disable dirty bit tracking */
658 xen_track_dirty_vram(xen_domid
, 0, 0, NULL
);
662 static void xen_log_sync(MemoryListener
*listener
, MemoryRegionSection
*section
)
664 XenIOState
*state
= container_of(listener
, XenIOState
, memory_listener
);
666 xen_sync_dirty_bitmap(state
, section
->offset_within_address_space
,
667 int128_get64(section
->size
));
670 static void xen_log_global_start(MemoryListener
*listener
)
673 xen_in_migration
= true;
677 static void xen_log_global_stop(MemoryListener
*listener
)
679 xen_in_migration
= false;
682 static MemoryListener xen_memory_listener
= {
683 .region_add
= xen_region_add
,
684 .region_del
= xen_region_del
,
685 .log_start
= xen_log_start
,
686 .log_stop
= xen_log_stop
,
687 .log_sync
= xen_log_sync
,
688 .log_global_start
= xen_log_global_start
,
689 .log_global_stop
= xen_log_global_stop
,
693 static MemoryListener xen_io_listener
= {
694 .region_add
= xen_io_add
,
695 .region_del
= xen_io_del
,
699 static DeviceListener xen_device_listener
= {
700 .realize
= xen_device_realize
,
701 .unrealize
= xen_device_unrealize
,
704 /* get the ioreq packets from share mem */
705 static ioreq_t
*cpu_get_ioreq_from_shared_memory(XenIOState
*state
, int vcpu
)
707 ioreq_t
*req
= xen_vcpu_ioreq(state
->shared_page
, vcpu
);
709 if (req
->state
!= STATE_IOREQ_READY
) {
710 DPRINTF("I/O request not ready: "
711 "%x, ptr: %x, port: %"PRIx64
", "
712 "data: %"PRIx64
", count: %u, size: %u\n",
713 req
->state
, req
->data_is_ptr
, req
->addr
,
714 req
->data
, req
->count
, req
->size
);
718 xen_rmb(); /* see IOREQ_READY /then/ read contents of ioreq */
720 req
->state
= STATE_IOREQ_INPROCESS
;
724 /* use poll to get the port notification */
725 /* ioreq_vec--out,the */
726 /* retval--the number of ioreq packet */
727 static ioreq_t
*cpu_get_ioreq(XenIOState
*state
)
732 port
= xenevtchn_pending(state
->xce_handle
);
733 if (port
== state
->bufioreq_local_port
) {
734 timer_mod(state
->buffered_io_timer
,
735 BUFFER_IO_MAX_DELAY
+ qemu_clock_get_ms(QEMU_CLOCK_REALTIME
));
740 for (i
= 0; i
< max_cpus
; i
++) {
741 if (state
->ioreq_local_port
[i
] == port
) {
747 hw_error("Fatal error while trying to get io event!\n");
750 /* unmask the wanted port again */
751 xenevtchn_unmask(state
->xce_handle
, port
);
753 /* get the io packet from shared memory */
754 state
->send_vcpu
= i
;
755 return cpu_get_ioreq_from_shared_memory(state
, i
);
758 /* read error or read nothing */
762 static uint32_t do_inp(uint32_t addr
, unsigned long size
)
766 return cpu_inb(addr
);
768 return cpu_inw(addr
);
770 return cpu_inl(addr
);
772 hw_error("inp: bad size: %04x %lx", addr
, size
);
776 static void do_outp(uint32_t addr
,
777 unsigned long size
, uint32_t val
)
781 return cpu_outb(addr
, val
);
783 return cpu_outw(addr
, val
);
785 return cpu_outl(addr
, val
);
787 hw_error("outp: bad size: %04x %lx", addr
, size
);
792 * Helper functions which read/write an object from/to physical guest
793 * memory, as part of the implementation of an ioreq.
796 * cpu_physical_memory_rw(addr + (req->df ? -1 : +1) * req->size * i,
797 * val, req->size, 0/1)
798 * except without the integer overflow problems.
800 static void rw_phys_req_item(hwaddr addr
,
801 ioreq_t
*req
, uint32_t i
, void *val
, int rw
)
803 /* Do everything unsigned so overflow just results in a truncated result
804 * and accesses to undesired parts of guest memory, which is up
806 hwaddr offset
= (hwaddr
)req
->size
* i
;
812 cpu_physical_memory_rw(addr
, val
, req
->size
, rw
);
815 static inline void read_phys_req_item(hwaddr addr
,
816 ioreq_t
*req
, uint32_t i
, void *val
)
818 rw_phys_req_item(addr
, req
, i
, val
, 0);
820 static inline void write_phys_req_item(hwaddr addr
,
821 ioreq_t
*req
, uint32_t i
, void *val
)
823 rw_phys_req_item(addr
, req
, i
, val
, 1);
827 static void cpu_ioreq_pio(ioreq_t
*req
)
831 trace_cpu_ioreq_pio(req
, req
->dir
, req
->df
, req
->data_is_ptr
, req
->addr
,
832 req
->data
, req
->count
, req
->size
);
834 if (req
->size
> sizeof(uint32_t)) {
835 hw_error("PIO: bad size (%u)", req
->size
);
838 if (req
->dir
== IOREQ_READ
) {
839 if (!req
->data_is_ptr
) {
840 req
->data
= do_inp(req
->addr
, req
->size
);
841 trace_cpu_ioreq_pio_read_reg(req
, req
->data
, req
->addr
,
846 for (i
= 0; i
< req
->count
; i
++) {
847 tmp
= do_inp(req
->addr
, req
->size
);
848 write_phys_req_item(req
->data
, req
, i
, &tmp
);
851 } else if (req
->dir
== IOREQ_WRITE
) {
852 if (!req
->data_is_ptr
) {
853 trace_cpu_ioreq_pio_write_reg(req
, req
->data
, req
->addr
,
855 do_outp(req
->addr
, req
->size
, req
->data
);
857 for (i
= 0; i
< req
->count
; i
++) {
860 read_phys_req_item(req
->data
, req
, i
, &tmp
);
861 do_outp(req
->addr
, req
->size
, tmp
);
867 static void cpu_ioreq_move(ioreq_t
*req
)
871 trace_cpu_ioreq_move(req
, req
->dir
, req
->df
, req
->data_is_ptr
, req
->addr
,
872 req
->data
, req
->count
, req
->size
);
874 if (req
->size
> sizeof(req
->data
)) {
875 hw_error("MMIO: bad size (%u)", req
->size
);
878 if (!req
->data_is_ptr
) {
879 if (req
->dir
== IOREQ_READ
) {
880 for (i
= 0; i
< req
->count
; i
++) {
881 read_phys_req_item(req
->addr
, req
, i
, &req
->data
);
883 } else if (req
->dir
== IOREQ_WRITE
) {
884 for (i
= 0; i
< req
->count
; i
++) {
885 write_phys_req_item(req
->addr
, req
, i
, &req
->data
);
891 if (req
->dir
== IOREQ_READ
) {
892 for (i
= 0; i
< req
->count
; i
++) {
893 read_phys_req_item(req
->addr
, req
, i
, &tmp
);
894 write_phys_req_item(req
->data
, req
, i
, &tmp
);
896 } else if (req
->dir
== IOREQ_WRITE
) {
897 for (i
= 0; i
< req
->count
; i
++) {
898 read_phys_req_item(req
->data
, req
, i
, &tmp
);
899 write_phys_req_item(req
->addr
, req
, i
, &tmp
);
905 static void regs_to_cpu(vmware_regs_t
*vmport_regs
, ioreq_t
*req
)
910 cpu
= X86_CPU(current_cpu
);
912 env
->regs
[R_EAX
] = req
->data
;
913 env
->regs
[R_EBX
] = vmport_regs
->ebx
;
914 env
->regs
[R_ECX
] = vmport_regs
->ecx
;
915 env
->regs
[R_EDX
] = vmport_regs
->edx
;
916 env
->regs
[R_ESI
] = vmport_regs
->esi
;
917 env
->regs
[R_EDI
] = vmport_regs
->edi
;
920 static void regs_from_cpu(vmware_regs_t
*vmport_regs
)
922 X86CPU
*cpu
= X86_CPU(current_cpu
);
923 CPUX86State
*env
= &cpu
->env
;
925 vmport_regs
->ebx
= env
->regs
[R_EBX
];
926 vmport_regs
->ecx
= env
->regs
[R_ECX
];
927 vmport_regs
->edx
= env
->regs
[R_EDX
];
928 vmport_regs
->esi
= env
->regs
[R_ESI
];
929 vmport_regs
->edi
= env
->regs
[R_EDI
];
932 static void handle_vmport_ioreq(XenIOState
*state
, ioreq_t
*req
)
934 vmware_regs_t
*vmport_regs
;
936 assert(state
->shared_vmport_page
);
938 &state
->shared_vmport_page
->vcpu_vmport_regs
[state
->send_vcpu
];
939 QEMU_BUILD_BUG_ON(sizeof(*req
) < sizeof(*vmport_regs
));
941 current_cpu
= state
->cpu_by_vcpu_id
[state
->send_vcpu
];
942 regs_to_cpu(vmport_regs
, req
);
944 regs_from_cpu(vmport_regs
);
948 static void handle_ioreq(XenIOState
*state
, ioreq_t
*req
)
950 trace_handle_ioreq(req
, req
->type
, req
->dir
, req
->df
, req
->data_is_ptr
,
951 req
->addr
, req
->data
, req
->count
, req
->size
);
953 if (!req
->data_is_ptr
&& (req
->dir
== IOREQ_WRITE
) &&
954 (req
->size
< sizeof (target_ulong
))) {
955 req
->data
&= ((target_ulong
) 1 << (8 * req
->size
)) - 1;
958 if (req
->dir
== IOREQ_WRITE
)
959 trace_handle_ioreq_write(req
, req
->type
, req
->df
, req
->data_is_ptr
,
960 req
->addr
, req
->data
, req
->count
, req
->size
);
966 case IOREQ_TYPE_COPY
:
969 case IOREQ_TYPE_VMWARE_PORT
:
970 handle_vmport_ioreq(state
, req
);
972 case IOREQ_TYPE_TIMEOFFSET
:
974 case IOREQ_TYPE_INVALIDATE
:
975 xen_invalidate_map_cache();
977 case IOREQ_TYPE_PCI_CONFIG
: {
978 uint32_t sbdf
= req
->addr
>> 32;
981 /* Fake a write to port 0xCF8 so that
982 * the config space access will target the
983 * correct device model.
986 ((req
->addr
& 0x0f00) << 16) |
987 ((sbdf
& 0xffff) << 8) |
989 do_outp(0xcf8, 4, val
);
991 /* Now issue the config space access via
994 req
->addr
= 0xcfc | (req
->addr
& 0x03);
999 hw_error("Invalid ioreq type 0x%x\n", req
->type
);
1001 if (req
->dir
== IOREQ_READ
) {
1002 trace_handle_ioreq_read(req
, req
->type
, req
->df
, req
->data_is_ptr
,
1003 req
->addr
, req
->data
, req
->count
, req
->size
);
1007 static int handle_buffered_iopage(XenIOState
*state
)
1009 buffered_iopage_t
*buf_page
= state
->buffered_io_page
;
1010 buf_ioreq_t
*buf_req
= NULL
;
1018 memset(&req
, 0x00, sizeof(req
));
1019 req
.state
= STATE_IOREQ_READY
;
1021 req
.dir
= IOREQ_WRITE
;
1024 uint32_t rdptr
= buf_page
->read_pointer
, wrptr
;
1027 wrptr
= buf_page
->write_pointer
;
1029 if (rdptr
!= buf_page
->read_pointer
) {
1032 if (rdptr
== wrptr
) {
1035 buf_req
= &buf_page
->buf_ioreq
[rdptr
% IOREQ_BUFFER_SLOT_NUM
];
1036 req
.size
= 1U << buf_req
->size
;
1037 req
.addr
= buf_req
->addr
;
1038 req
.data
= buf_req
->data
;
1039 req
.type
= buf_req
->type
;
1041 qw
= (req
.size
== 8);
1043 if (rdptr
+ 1 == wrptr
) {
1044 hw_error("Incomplete quad word buffered ioreq");
1046 buf_req
= &buf_page
->buf_ioreq
[(rdptr
+ 1) %
1047 IOREQ_BUFFER_SLOT_NUM
];
1048 req
.data
|= ((uint64_t)buf_req
->data
) << 32;
1052 handle_ioreq(state
, &req
);
1054 /* Only req.data may get updated by handle_ioreq(), albeit even that
1055 * should not happen as such data would never make it to the guest (we
1056 * can only usefully see writes here after all).
1058 assert(req
.state
== STATE_IOREQ_READY
);
1059 assert(req
.count
== 1);
1060 assert(req
.dir
== IOREQ_WRITE
);
1061 assert(!req
.data_is_ptr
);
1063 atomic_add(&buf_page
->read_pointer
, qw
+ 1);
1069 static void handle_buffered_io(void *opaque
)
1071 XenIOState
*state
= opaque
;
1073 if (handle_buffered_iopage(state
)) {
1074 timer_mod(state
->buffered_io_timer
,
1075 BUFFER_IO_MAX_DELAY
+ qemu_clock_get_ms(QEMU_CLOCK_REALTIME
));
1077 timer_del(state
->buffered_io_timer
);
1078 xenevtchn_unmask(state
->xce_handle
, state
->bufioreq_local_port
);
1082 static void cpu_handle_ioreq(void *opaque
)
1084 XenIOState
*state
= opaque
;
1085 ioreq_t
*req
= cpu_get_ioreq(state
);
1087 handle_buffered_iopage(state
);
1089 ioreq_t copy
= *req
;
1092 handle_ioreq(state
, ©
);
1093 req
->data
= copy
.data
;
1095 if (req
->state
!= STATE_IOREQ_INPROCESS
) {
1096 fprintf(stderr
, "Badness in I/O request ... not in service?!: "
1097 "%x, ptr: %x, port: %"PRIx64
", "
1098 "data: %"PRIx64
", count: %u, size: %u, type: %u\n",
1099 req
->state
, req
->data_is_ptr
, req
->addr
,
1100 req
->data
, req
->count
, req
->size
, req
->type
);
1101 destroy_hvm_domain(false);
1105 xen_wmb(); /* Update ioreq contents /then/ update state. */
1108 * We do this before we send the response so that the tools
1109 * have the opportunity to pick up on the reset before the
1110 * guest resumes and does a hlt with interrupts disabled which
1111 * causes Xen to powerdown the domain.
1113 if (runstate_is_running()) {
1114 ShutdownCause request
;
1116 if (qemu_shutdown_requested_get()) {
1117 destroy_hvm_domain(false);
1119 request
= qemu_reset_requested_get();
1121 qemu_system_reset(request
);
1122 destroy_hvm_domain(true);
1126 req
->state
= STATE_IORESP_READY
;
1127 xenevtchn_notify(state
->xce_handle
,
1128 state
->ioreq_local_port
[state
->send_vcpu
]);
1132 static void xen_main_loop_prepare(XenIOState
*state
)
1136 if (state
->xce_handle
!= NULL
) {
1137 evtchn_fd
= xenevtchn_fd(state
->xce_handle
);
1140 state
->buffered_io_timer
= timer_new_ms(QEMU_CLOCK_REALTIME
, handle_buffered_io
,
1143 if (evtchn_fd
!= -1) {
1144 CPUState
*cpu_state
;
1146 DPRINTF("%s: Init cpu_by_vcpu_id\n", __func__
);
1147 CPU_FOREACH(cpu_state
) {
1148 DPRINTF("%s: cpu_by_vcpu_id[%d]=%p\n",
1149 __func__
, cpu_state
->cpu_index
, cpu_state
);
1150 state
->cpu_by_vcpu_id
[cpu_state
->cpu_index
] = cpu_state
;
1152 qemu_set_fd_handler(evtchn_fd
, cpu_handle_ioreq
, NULL
, state
);
1157 static void xen_hvm_change_state_handler(void *opaque
, int running
,
1160 XenIOState
*state
= opaque
;
1163 xen_main_loop_prepare(state
);
1166 xen_set_ioreq_server_state(xen_domid
,
1168 (rstate
== RUN_STATE_RUNNING
));
1171 static void xen_exit_notifier(Notifier
*n
, void *data
)
1173 XenIOState
*state
= container_of(n
, XenIOState
, exit
);
1175 xenevtchn_close(state
->xce_handle
);
1176 xs_daemon_close(state
->xenstore
);
1179 #ifdef XEN_COMPAT_PHYSMAP
1180 static void xen_read_physmap(XenIOState
*state
)
1182 XenPhysmap
*physmap
= NULL
;
1183 unsigned int len
, num
, i
;
1184 char path
[80], *value
= NULL
;
1185 char **entries
= NULL
;
1187 snprintf(path
, sizeof(path
),
1188 "/local/domain/0/device-model/%d/physmap", xen_domid
);
1189 entries
= xs_directory(state
->xenstore
, 0, path
, &num
);
1190 if (entries
== NULL
)
1193 for (i
= 0; i
< num
; i
++) {
1194 physmap
= g_malloc(sizeof (XenPhysmap
));
1195 physmap
->phys_offset
= strtoull(entries
[i
], NULL
, 16);
1196 snprintf(path
, sizeof(path
),
1197 "/local/domain/0/device-model/%d/physmap/%s/start_addr",
1198 xen_domid
, entries
[i
]);
1199 value
= xs_read(state
->xenstore
, 0, path
, &len
);
1200 if (value
== NULL
) {
1204 physmap
->start_addr
= strtoull(value
, NULL
, 16);
1207 snprintf(path
, sizeof(path
),
1208 "/local/domain/0/device-model/%d/physmap/%s/size",
1209 xen_domid
, entries
[i
]);
1210 value
= xs_read(state
->xenstore
, 0, path
, &len
);
1211 if (value
== NULL
) {
1215 physmap
->size
= strtoull(value
, NULL
, 16);
1218 snprintf(path
, sizeof(path
),
1219 "/local/domain/0/device-model/%d/physmap/%s/name",
1220 xen_domid
, entries
[i
]);
1221 physmap
->name
= xs_read(state
->xenstore
, 0, path
, &len
);
1223 QLIST_INSERT_HEAD(&xen_physmap
, physmap
, list
);
1228 static void xen_read_physmap(XenIOState
*state
)
1233 static void xen_wakeup_notifier(Notifier
*notifier
, void *data
)
1235 xc_set_hvm_param(xen_xc
, xen_domid
, HVM_PARAM_ACPI_S_STATE
, 0);
1238 static int xen_map_ioreq_server(XenIOState
*state
)
1241 xenforeignmemory_resource_handle
*fres
;
1242 xen_pfn_t ioreq_pfn
;
1243 xen_pfn_t bufioreq_pfn
;
1244 evtchn_port_t bufioreq_evtchn
;
1248 * Attempt to map using the resource API and fall back to normal
1249 * foreign mapping if this is not supported.
1251 QEMU_BUILD_BUG_ON(XENMEM_resource_ioreq_server_frame_bufioreq
!= 0);
1252 QEMU_BUILD_BUG_ON(XENMEM_resource_ioreq_server_frame_ioreq(0) != 1);
1253 fres
= xenforeignmemory_map_resource(xen_fmem
, xen_domid
,
1254 XENMEM_resource_ioreq_server
,
1255 state
->ioservid
, 0, 2,
1257 PROT_READ
| PROT_WRITE
, 0);
1259 trace_xen_map_resource_ioreq(state
->ioservid
, addr
);
1260 state
->buffered_io_page
= addr
;
1261 state
->shared_page
= addr
+ TARGET_PAGE_SIZE
;
1262 } else if (errno
!= EOPNOTSUPP
) {
1263 error_report("failed to map ioreq server resources: error %d handle=%p",
1268 rc
= xen_get_ioreq_server_info(xen_domid
, state
->ioservid
,
1269 (state
->shared_page
== NULL
) ?
1271 (state
->buffered_io_page
== NULL
) ?
1272 &bufioreq_pfn
: NULL
,
1275 error_report("failed to get ioreq server info: error %d handle=%p",
1280 if (state
->shared_page
== NULL
) {
1281 DPRINTF("shared page at pfn %lx\n", ioreq_pfn
);
1283 state
->shared_page
= xenforeignmemory_map(xen_fmem
, xen_domid
,
1284 PROT_READ
| PROT_WRITE
,
1285 1, &ioreq_pfn
, NULL
);
1286 if (state
->shared_page
== NULL
) {
1287 error_report("map shared IO page returned error %d handle=%p",
1292 if (state
->buffered_io_page
== NULL
) {
1293 DPRINTF("buffered io page at pfn %lx\n", bufioreq_pfn
);
1295 state
->buffered_io_page
= xenforeignmemory_map(xen_fmem
, xen_domid
,
1296 PROT_READ
| PROT_WRITE
,
1299 if (state
->buffered_io_page
== NULL
) {
1300 error_report("map buffered IO page returned error %d", errno
);
1305 if (state
->shared_page
== NULL
|| state
->buffered_io_page
== NULL
) {
1309 DPRINTF("buffered io evtchn is %x\n", bufioreq_evtchn
);
1311 state
->bufioreq_remote_port
= bufioreq_evtchn
;
1316 void xen_hvm_init(PCMachineState
*pcms
, MemoryRegion
**ram_memory
)
1319 xen_pfn_t ioreq_pfn
;
1322 state
= g_malloc0(sizeof (XenIOState
));
1324 state
->xce_handle
= xenevtchn_open(NULL
, 0);
1325 if (state
->xce_handle
== NULL
) {
1326 perror("xen: event channel open");
1330 state
->xenstore
= xs_daemon_open();
1331 if (state
->xenstore
== NULL
) {
1332 perror("xen: xenstore open");
1336 xen_create_ioreq_server(xen_domid
, &state
->ioservid
);
1338 state
->exit
.notify
= xen_exit_notifier
;
1339 qemu_add_exit_notifier(&state
->exit
);
1341 state
->suspend
.notify
= xen_suspend_notifier
;
1342 qemu_register_suspend_notifier(&state
->suspend
);
1344 state
->wakeup
.notify
= xen_wakeup_notifier
;
1345 qemu_register_wakeup_notifier(&state
->wakeup
);
1347 rc
= xen_map_ioreq_server(state
);
1352 rc
= xen_get_vmport_regs_pfn(xen_xc
, xen_domid
, &ioreq_pfn
);
1354 DPRINTF("shared vmport page at pfn %lx\n", ioreq_pfn
);
1355 state
->shared_vmport_page
=
1356 xenforeignmemory_map(xen_fmem
, xen_domid
, PROT_READ
|PROT_WRITE
,
1357 1, &ioreq_pfn
, NULL
);
1358 if (state
->shared_vmport_page
== NULL
) {
1359 error_report("map shared vmport IO page returned error %d handle=%p",
1363 } else if (rc
!= -ENOSYS
) {
1364 error_report("get vmport regs pfn returned error %d, rc=%d",
1369 /* Note: cpus is empty at this point in init */
1370 state
->cpu_by_vcpu_id
= g_malloc0(max_cpus
* sizeof(CPUState
*));
1372 rc
= xen_set_ioreq_server_state(xen_domid
, state
->ioservid
, true);
1374 error_report("failed to enable ioreq server info: error %d handle=%p",
1379 state
->ioreq_local_port
= g_malloc0(max_cpus
* sizeof (evtchn_port_t
));
1381 /* FIXME: how about if we overflow the page here? */
1382 for (i
= 0; i
< max_cpus
; i
++) {
1383 rc
= xenevtchn_bind_interdomain(state
->xce_handle
, xen_domid
,
1384 xen_vcpu_eport(state
->shared_page
, i
));
1386 error_report("shared evtchn %d bind error %d", i
, errno
);
1389 state
->ioreq_local_port
[i
] = rc
;
1392 rc
= xenevtchn_bind_interdomain(state
->xce_handle
, xen_domid
,
1393 state
->bufioreq_remote_port
);
1395 error_report("buffered evtchn bind error %d", errno
);
1398 state
->bufioreq_local_port
= rc
;
1400 /* Init RAM management */
1401 #ifdef XEN_COMPAT_PHYSMAP
1402 xen_map_cache_init(xen_phys_offset_to_gaddr
, state
);
1404 xen_map_cache_init(NULL
, state
);
1406 xen_ram_init(pcms
, ram_size
, ram_memory
);
1408 qemu_add_vm_change_state_handler(xen_hvm_change_state_handler
, state
);
1410 state
->memory_listener
= xen_memory_listener
;
1411 memory_listener_register(&state
->memory_listener
, &address_space_memory
);
1412 state
->log_for_dirtybit
= NULL
;
1414 state
->io_listener
= xen_io_listener
;
1415 memory_listener_register(&state
->io_listener
, &address_space_io
);
1417 state
->device_listener
= xen_device_listener
;
1418 device_listener_register(&state
->device_listener
);
1420 /* Initialize backend core & drivers */
1421 if (xen_be_init() != 0) {
1422 error_report("xen backend core setup failed");
1425 xen_be_register_common();
1427 QLIST_INIT(&xen_physmap
);
1428 xen_read_physmap(state
);
1430 /* Disable ACPI build because Xen handles it */
1431 pcms
->acpi_build_enabled
= false;
1436 error_report("xen hardware virtual machine initialisation failed");
1440 void destroy_hvm_domain(bool reboot
)
1442 xc_interface
*xc_handle
;
1446 unsigned int reason
= reboot
? SHUTDOWN_reboot
: SHUTDOWN_poweroff
;
1449 rc
= xendevicemodel_shutdown(xen_dmod
, xen_domid
, reason
);
1453 if (errno
!= ENOTTY
/* old Xen */) {
1454 perror("xendevicemodel_shutdown failed");
1456 /* well, try the old thing then */
1459 xc_handle
= xc_interface_open(0, 0, 0);
1460 if (xc_handle
== NULL
) {
1461 fprintf(stderr
, "Cannot acquire xenctrl handle\n");
1463 sts
= xc_domain_shutdown(xc_handle
, xen_domid
, reason
);
1465 fprintf(stderr
, "xc_domain_shutdown failed to issue %s, "
1466 "sts %d, %s\n", reboot
? "reboot" : "poweroff",
1467 sts
, strerror(errno
));
1469 fprintf(stderr
, "Issued domain %d %s\n", xen_domid
,
1470 reboot
? "reboot" : "poweroff");
1472 xc_interface_close(xc_handle
);
1476 void xen_register_framebuffer(MemoryRegion
*mr
)
1481 void xen_shutdown_fatal_error(const char *fmt
, ...)
1486 vfprintf(stderr
, fmt
, ap
);
1488 fprintf(stderr
, "Will destroy the domain.\n");
1489 /* destroy the domain */
1490 qemu_system_shutdown_request(SHUTDOWN_CAUSE_HOST_ERROR
);
1493 void xen_hvm_modified_memory(ram_addr_t start
, ram_addr_t length
)
1495 if (unlikely(xen_in_migration
)) {
1497 ram_addr_t start_pfn
, nb_pages
;
1499 start
= xen_phys_offset_to_gaddr(start
, length
);
1502 length
= TARGET_PAGE_SIZE
;
1504 start_pfn
= start
>> TARGET_PAGE_BITS
;
1505 nb_pages
= ((start
+ length
+ TARGET_PAGE_SIZE
- 1) >> TARGET_PAGE_BITS
)
1507 rc
= xen_modified_memory(xen_domid
, start_pfn
, nb_pages
);
1510 "%s failed for "RAM_ADDR_FMT
" ("RAM_ADDR_FMT
"): %i, %s\n",
1511 __func__
, start
, nb_pages
, errno
, strerror(errno
));
1516 void qmp_xen_set_global_dirty_log(bool enable
, Error
**errp
)
1519 memory_global_dirty_log_start();
1521 memory_global_dirty_log_stop();