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 typedef struct XenIOState
{
91 shared_iopage_t
*shared_page
;
92 shared_vmport_iopage_t
*shared_vmport_page
;
93 buffered_iopage_t
*buffered_io_page
;
94 QEMUTimer
*buffered_io_timer
;
95 CPUState
**cpu_by_vcpu_id
;
96 /* the evtchn port for polling the notification, */
97 evtchn_port_t
*ioreq_local_port
;
98 /* evtchn local port for buffered io */
99 evtchn_port_t bufioreq_local_port
;
100 /* the evtchn fd for polling */
101 xenevtchn_handle
*xce_handle
;
102 /* which vcpu we are serving */
105 struct xs_handle
*xenstore
;
106 MemoryListener memory_listener
;
107 MemoryListener io_listener
;
108 DeviceListener device_listener
;
109 QLIST_HEAD(, XenPhysmap
) physmap
;
110 hwaddr free_phys_offset
;
111 const XenPhysmap
*log_for_dirtybit
;
118 /* Xen specific function for piix pci */
120 int xen_pci_slot_get_pirq(PCIDevice
*pci_dev
, int irq_num
)
122 return irq_num
+ ((pci_dev
->devfn
>> 3) << 2);
125 void xen_piix3_set_irq(void *opaque
, int irq_num
, int level
)
127 xen_set_pci_intx_level(xen_domid
, 0, 0, irq_num
>> 2,
131 void xen_piix_pci_write_config_client(uint32_t address
, uint32_t val
, int len
)
135 /* Scan for updates to PCI link routes (0x60-0x63). */
136 for (i
= 0; i
< len
; i
++) {
137 uint8_t v
= (val
>> (8 * i
)) & 0xff;
142 if (((address
+ i
) >= 0x60) && ((address
+ i
) <= 0x63)) {
143 xen_set_pci_link_route(xen_domid
, address
+ i
- 0x60, v
);
148 int xen_is_pirq_msi(uint32_t msi_data
)
150 /* If vector is 0, the msi is remapped into a pirq, passed as
153 return ((msi_data
& MSI_DATA_VECTOR_MASK
) >> MSI_DATA_VECTOR_SHIFT
) == 0;
156 void xen_hvm_inject_msi(uint64_t addr
, uint32_t data
)
158 xen_inject_msi(xen_domid
, addr
, data
);
161 static void xen_suspend_notifier(Notifier
*notifier
, void *data
)
163 xc_set_hvm_param(xen_xc
, xen_domid
, HVM_PARAM_ACPI_S_STATE
, 3);
166 /* Xen Interrupt Controller */
168 static void xen_set_irq(void *opaque
, int irq
, int level
)
170 xen_set_isa_irq_level(xen_domid
, irq
, level
);
173 qemu_irq
*xen_interrupt_controller_init(void)
175 return qemu_allocate_irqs(xen_set_irq
, NULL
, 16);
180 static void xen_ram_init(PCMachineState
*pcms
,
181 ram_addr_t ram_size
, MemoryRegion
**ram_memory_p
)
183 MemoryRegion
*sysmem
= get_system_memory();
184 ram_addr_t block_len
;
185 uint64_t user_lowmem
= object_property_get_uint(qdev_get_machine(),
186 PC_MACHINE_MAX_RAM_BELOW_4G
,
189 /* Handle the machine opt max-ram-below-4g. It is basically doing
190 * min(xen limit, user limit).
193 user_lowmem
= HVM_BELOW_4G_RAM_END
; /* default */
195 if (HVM_BELOW_4G_RAM_END
<= user_lowmem
) {
196 user_lowmem
= HVM_BELOW_4G_RAM_END
;
199 if (ram_size
>= user_lowmem
) {
200 pcms
->above_4g_mem_size
= ram_size
- user_lowmem
;
201 pcms
->below_4g_mem_size
= user_lowmem
;
203 pcms
->above_4g_mem_size
= 0;
204 pcms
->below_4g_mem_size
= ram_size
;
206 if (!pcms
->above_4g_mem_size
) {
207 block_len
= ram_size
;
210 * Xen does not allocate the memory continuously, it keeps a
211 * hole of the size computed above or passed in.
213 block_len
= (1ULL << 32) + pcms
->above_4g_mem_size
;
215 memory_region_init_ram(&ram_memory
, NULL
, "xen.ram", block_len
,
217 *ram_memory_p
= &ram_memory
;
219 memory_region_init_alias(&ram_640k
, NULL
, "xen.ram.640k",
220 &ram_memory
, 0, 0xa0000);
221 memory_region_add_subregion(sysmem
, 0, &ram_640k
);
222 /* Skip of the VGA IO memory space, it will be registered later by the VGA
225 * The area between 0xc0000 and 0x100000 will be used by SeaBIOS to load
226 * the Options ROM, so it is registered here as RAM.
228 memory_region_init_alias(&ram_lo
, NULL
, "xen.ram.lo",
229 &ram_memory
, 0xc0000,
230 pcms
->below_4g_mem_size
- 0xc0000);
231 memory_region_add_subregion(sysmem
, 0xc0000, &ram_lo
);
232 if (pcms
->above_4g_mem_size
> 0) {
233 memory_region_init_alias(&ram_hi
, NULL
, "xen.ram.hi",
234 &ram_memory
, 0x100000000ULL
,
235 pcms
->above_4g_mem_size
);
236 memory_region_add_subregion(sysmem
, 0x100000000ULL
, &ram_hi
);
240 void xen_ram_alloc(ram_addr_t ram_addr
, ram_addr_t size
, MemoryRegion
*mr
,
243 unsigned long nr_pfn
;
247 if (runstate_check(RUN_STATE_INMIGRATE
)) {
248 /* RAM already populated in Xen */
249 fprintf(stderr
, "%s: do not alloc "RAM_ADDR_FMT
250 " bytes of ram at "RAM_ADDR_FMT
" when runstate is INMIGRATE\n",
251 __func__
, size
, ram_addr
);
255 if (mr
== &ram_memory
) {
259 trace_xen_ram_alloc(ram_addr
, size
);
261 nr_pfn
= size
>> TARGET_PAGE_BITS
;
262 pfn_list
= g_malloc(sizeof (*pfn_list
) * nr_pfn
);
264 for (i
= 0; i
< nr_pfn
; i
++) {
265 pfn_list
[i
] = (ram_addr
>> TARGET_PAGE_BITS
) + i
;
268 if (xc_domain_populate_physmap_exact(xen_xc
, xen_domid
, nr_pfn
, 0, 0, pfn_list
)) {
269 error_setg(errp
, "xen: failed to populate ram at " RAM_ADDR_FMT
,
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 #ifdef XEN_COMPAT_PHYSMAP
292 static hwaddr
xen_phys_offset_to_gaddr(hwaddr start_addr
,
293 ram_addr_t size
, void *opaque
)
295 hwaddr addr
= start_addr
& TARGET_PAGE_MASK
;
296 XenIOState
*xen_io_state
= opaque
;
297 XenPhysmap
*physmap
= NULL
;
299 QLIST_FOREACH(physmap
, &xen_io_state
->physmap
, list
) {
300 if (range_covers_byte(physmap
->phys_offset
, physmap
->size
, addr
)) {
301 return physmap
->start_addr
;
308 static int xen_save_physmap(XenIOState
*state
, XenPhysmap
*physmap
)
310 char path
[80], value
[17];
312 snprintf(path
, sizeof(path
),
313 "/local/domain/0/device-model/%d/physmap/%"PRIx64
"/start_addr",
314 xen_domid
, (uint64_t)physmap
->phys_offset
);
315 snprintf(value
, sizeof(value
), "%"PRIx64
, (uint64_t)physmap
->start_addr
);
316 if (!xs_write(state
->xenstore
, 0, path
, value
, strlen(value
))) {
319 snprintf(path
, sizeof(path
),
320 "/local/domain/0/device-model/%d/physmap/%"PRIx64
"/size",
321 xen_domid
, (uint64_t)physmap
->phys_offset
);
322 snprintf(value
, sizeof(value
), "%"PRIx64
, (uint64_t)physmap
->size
);
323 if (!xs_write(state
->xenstore
, 0, path
, value
, strlen(value
))) {
327 snprintf(path
, sizeof(path
),
328 "/local/domain/0/device-model/%d/physmap/%"PRIx64
"/name",
329 xen_domid
, (uint64_t)physmap
->phys_offset
);
330 if (!xs_write(state
->xenstore
, 0, path
,
331 physmap
->name
, strlen(physmap
->name
))) {
338 static int xen_save_physmap(XenIOState
*state
, XenPhysmap
*physmap
)
344 static int xen_add_to_physmap(XenIOState
*state
,
348 hwaddr offset_within_region
)
352 XenPhysmap
*physmap
= NULL
;
353 hwaddr pfn
, start_gpfn
;
354 hwaddr phys_offset
= memory_region_get_ram_addr(mr
);
357 if (get_physmapping(state
, start_addr
, size
)) {
364 /* Xen can only handle a single dirty log region for now and we want
365 * the linear framebuffer to be that region.
366 * Avoid tracking any regions that is not videoram and avoid tracking
367 * the legacy vga region. */
368 if (mr
== framebuffer
&& start_addr
> 0xbffff) {
374 DPRINTF("mapping vram to %"HWADDR_PRIx
" - %"HWADDR_PRIx
"\n",
375 start_addr
, start_addr
+ size
);
377 mr_name
= memory_region_name(mr
);
379 physmap
= g_malloc(sizeof(XenPhysmap
));
381 physmap
->start_addr
= start_addr
;
382 physmap
->size
= size
;
383 physmap
->name
= mr_name
;
384 physmap
->phys_offset
= phys_offset
;
386 QLIST_INSERT_HEAD(&state
->physmap
, physmap
, list
);
388 if (runstate_check(RUN_STATE_INMIGRATE
)) {
389 /* Now when we have a physmap entry we can replace a dummy mapping with
390 * a real one of guest foreign memory. */
391 uint8_t *p
= xen_replace_cache_entry(phys_offset
, start_addr
, size
);
392 assert(p
&& p
== memory_region_get_ram_ptr(mr
));
397 pfn
= phys_offset
>> TARGET_PAGE_BITS
;
398 start_gpfn
= start_addr
>> TARGET_PAGE_BITS
;
399 for (i
= 0; i
< size
>> TARGET_PAGE_BITS
; i
++) {
400 unsigned long idx
= pfn
+ i
;
401 xen_pfn_t gpfn
= start_gpfn
+ i
;
403 rc
= xen_xc_domain_add_to_physmap(xen_xc
, xen_domid
, XENMAPSPACE_gmfn
, idx
, gpfn
);
405 DPRINTF("add_to_physmap MFN %"PRI_xen_pfn
" to PFN %"
406 PRI_xen_pfn
" failed: %d (errno: %d)\n", idx
, gpfn
, rc
, errno
);
411 xc_domain_pin_memory_cacheattr(xen_xc
, xen_domid
,
412 start_addr
>> TARGET_PAGE_BITS
,
413 (start_addr
+ size
- 1) >> TARGET_PAGE_BITS
,
414 XEN_DOMCTL_MEM_CACHEATTR_WB
);
415 return xen_save_physmap(state
, physmap
);
418 static int xen_remove_from_physmap(XenIOState
*state
,
424 XenPhysmap
*physmap
= NULL
;
425 hwaddr phys_offset
= 0;
427 physmap
= get_physmapping(state
, start_addr
, size
);
428 if (physmap
== NULL
) {
432 phys_offset
= physmap
->phys_offset
;
433 size
= physmap
->size
;
435 DPRINTF("unmapping vram to %"HWADDR_PRIx
" - %"HWADDR_PRIx
", at "
436 "%"HWADDR_PRIx
"\n", start_addr
, start_addr
+ size
, phys_offset
);
438 size
>>= TARGET_PAGE_BITS
;
439 start_addr
>>= TARGET_PAGE_BITS
;
440 phys_offset
>>= TARGET_PAGE_BITS
;
441 for (i
= 0; i
< size
; i
++) {
442 xen_pfn_t idx
= start_addr
+ i
;
443 xen_pfn_t gpfn
= phys_offset
+ i
;
445 rc
= xen_xc_domain_add_to_physmap(xen_xc
, xen_domid
, XENMAPSPACE_gmfn
, idx
, gpfn
);
447 fprintf(stderr
, "add_to_physmap MFN %"PRI_xen_pfn
" to PFN %"
448 PRI_xen_pfn
" failed: %d (errno: %d)\n", idx
, gpfn
, rc
, errno
);
453 QLIST_REMOVE(physmap
, list
);
454 if (state
->log_for_dirtybit
== physmap
) {
455 state
->log_for_dirtybit
= NULL
;
462 static void xen_set_memory(struct MemoryListener
*listener
,
463 MemoryRegionSection
*section
,
466 XenIOState
*state
= container_of(listener
, XenIOState
, memory_listener
);
467 hwaddr start_addr
= section
->offset_within_address_space
;
468 ram_addr_t size
= int128_get64(section
->size
);
469 bool log_dirty
= memory_region_is_logging(section
->mr
, DIRTY_MEMORY_VGA
);
470 hvmmem_type_t mem_type
;
472 if (section
->mr
== &ram_memory
) {
476 xen_map_memory_section(xen_domid
, state
->ioservid
,
479 xen_unmap_memory_section(xen_domid
, state
->ioservid
,
484 if (!memory_region_is_ram(section
->mr
)) {
488 if (log_dirty
!= add
) {
492 trace_xen_client_set_memory(start_addr
, size
, log_dirty
);
494 start_addr
&= TARGET_PAGE_MASK
;
495 size
= TARGET_PAGE_ALIGN(size
);
498 if (!memory_region_is_rom(section
->mr
)) {
499 xen_add_to_physmap(state
, start_addr
, size
,
500 section
->mr
, section
->offset_within_region
);
502 mem_type
= HVMMEM_ram_ro
;
503 if (xen_set_mem_type(xen_domid
, mem_type
,
504 start_addr
>> TARGET_PAGE_BITS
,
505 size
>> TARGET_PAGE_BITS
)) {
506 DPRINTF("xen_set_mem_type error, addr: "TARGET_FMT_plx
"\n",
511 if (xen_remove_from_physmap(state
, start_addr
, size
) < 0) {
512 DPRINTF("physmapping does not exist at "TARGET_FMT_plx
"\n", start_addr
);
517 static void xen_region_add(MemoryListener
*listener
,
518 MemoryRegionSection
*section
)
520 memory_region_ref(section
->mr
);
521 xen_set_memory(listener
, section
, true);
524 static void xen_region_del(MemoryListener
*listener
,
525 MemoryRegionSection
*section
)
527 xen_set_memory(listener
, section
, false);
528 memory_region_unref(section
->mr
);
531 static void xen_io_add(MemoryListener
*listener
,
532 MemoryRegionSection
*section
)
534 XenIOState
*state
= container_of(listener
, XenIOState
, io_listener
);
535 MemoryRegion
*mr
= section
->mr
;
537 if (mr
->ops
== &unassigned_io_ops
) {
541 memory_region_ref(mr
);
543 xen_map_io_section(xen_domid
, state
->ioservid
, section
);
546 static void xen_io_del(MemoryListener
*listener
,
547 MemoryRegionSection
*section
)
549 XenIOState
*state
= container_of(listener
, XenIOState
, io_listener
);
550 MemoryRegion
*mr
= section
->mr
;
552 if (mr
->ops
== &unassigned_io_ops
) {
556 xen_unmap_io_section(xen_domid
, state
->ioservid
, section
);
558 memory_region_unref(mr
);
561 static void xen_device_realize(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_map_pcidev(xen_domid
, state
->ioservid
, pci_dev
);
573 static void xen_device_unrealize(DeviceListener
*listener
,
576 XenIOState
*state
= container_of(listener
, XenIOState
, device_listener
);
578 if (object_dynamic_cast(OBJECT(dev
), TYPE_PCI_DEVICE
)) {
579 PCIDevice
*pci_dev
= PCI_DEVICE(dev
);
581 xen_unmap_pcidev(xen_domid
, state
->ioservid
, pci_dev
);
585 static void xen_sync_dirty_bitmap(XenIOState
*state
,
589 hwaddr npages
= size
>> TARGET_PAGE_BITS
;
590 const int width
= sizeof(unsigned long) * 8;
591 unsigned long bitmap
[DIV_ROUND_UP(npages
, width
)];
593 const XenPhysmap
*physmap
= NULL
;
595 physmap
= get_physmapping(state
, start_addr
, size
);
596 if (physmap
== NULL
) {
601 if (state
->log_for_dirtybit
== NULL
) {
602 state
->log_for_dirtybit
= physmap
;
603 } else if (state
->log_for_dirtybit
!= physmap
) {
604 /* Only one range for dirty bitmap can be tracked. */
608 rc
= xen_track_dirty_vram(xen_domid
, start_addr
>> TARGET_PAGE_BITS
,
612 #define ENODATA ENOENT
614 if (errno
== ENODATA
) {
615 memory_region_set_dirty(framebuffer
, 0, size
);
616 DPRINTF("xen: track_dirty_vram failed (0x" TARGET_FMT_plx
617 ", 0x" TARGET_FMT_plx
"): %s\n",
618 start_addr
, start_addr
+ size
, strerror(errno
));
623 for (i
= 0; i
< ARRAY_SIZE(bitmap
); i
++) {
624 unsigned long map
= bitmap
[i
];
628 memory_region_set_dirty(framebuffer
,
629 (i
* width
+ j
) * TARGET_PAGE_SIZE
,
635 static void xen_log_start(MemoryListener
*listener
,
636 MemoryRegionSection
*section
,
639 XenIOState
*state
= container_of(listener
, XenIOState
, memory_listener
);
641 if (new & ~old
& (1 << DIRTY_MEMORY_VGA
)) {
642 xen_sync_dirty_bitmap(state
, section
->offset_within_address_space
,
643 int128_get64(section
->size
));
647 static void xen_log_stop(MemoryListener
*listener
, MemoryRegionSection
*section
,
650 XenIOState
*state
= container_of(listener
, XenIOState
, memory_listener
);
652 if (old
& ~new & (1 << DIRTY_MEMORY_VGA
)) {
653 state
->log_for_dirtybit
= NULL
;
654 /* Disable dirty bit tracking */
655 xen_track_dirty_vram(xen_domid
, 0, 0, NULL
);
659 static void xen_log_sync(MemoryListener
*listener
, MemoryRegionSection
*section
)
661 XenIOState
*state
= container_of(listener
, XenIOState
, memory_listener
);
663 xen_sync_dirty_bitmap(state
, section
->offset_within_address_space
,
664 int128_get64(section
->size
));
667 static void xen_log_global_start(MemoryListener
*listener
)
670 xen_in_migration
= true;
674 static void xen_log_global_stop(MemoryListener
*listener
)
676 xen_in_migration
= false;
679 static MemoryListener xen_memory_listener
= {
680 .region_add
= xen_region_add
,
681 .region_del
= xen_region_del
,
682 .log_start
= xen_log_start
,
683 .log_stop
= xen_log_stop
,
684 .log_sync
= xen_log_sync
,
685 .log_global_start
= xen_log_global_start
,
686 .log_global_stop
= xen_log_global_stop
,
690 static MemoryListener xen_io_listener
= {
691 .region_add
= xen_io_add
,
692 .region_del
= xen_io_del
,
696 static DeviceListener xen_device_listener
= {
697 .realize
= xen_device_realize
,
698 .unrealize
= xen_device_unrealize
,
701 /* get the ioreq packets from share mem */
702 static ioreq_t
*cpu_get_ioreq_from_shared_memory(XenIOState
*state
, int vcpu
)
704 ioreq_t
*req
= xen_vcpu_ioreq(state
->shared_page
, vcpu
);
706 if (req
->state
!= STATE_IOREQ_READY
) {
707 DPRINTF("I/O request not ready: "
708 "%x, ptr: %x, port: %"PRIx64
", "
709 "data: %"PRIx64
", count: %u, size: %u\n",
710 req
->state
, req
->data_is_ptr
, req
->addr
,
711 req
->data
, req
->count
, req
->size
);
715 xen_rmb(); /* see IOREQ_READY /then/ read contents of ioreq */
717 req
->state
= STATE_IOREQ_INPROCESS
;
721 /* use poll to get the port notification */
722 /* ioreq_vec--out,the */
723 /* retval--the number of ioreq packet */
724 static ioreq_t
*cpu_get_ioreq(XenIOState
*state
)
729 port
= xenevtchn_pending(state
->xce_handle
);
730 if (port
== state
->bufioreq_local_port
) {
731 timer_mod(state
->buffered_io_timer
,
732 BUFFER_IO_MAX_DELAY
+ qemu_clock_get_ms(QEMU_CLOCK_REALTIME
));
737 for (i
= 0; i
< max_cpus
; i
++) {
738 if (state
->ioreq_local_port
[i
] == port
) {
744 hw_error("Fatal error while trying to get io event!\n");
747 /* unmask the wanted port again */
748 xenevtchn_unmask(state
->xce_handle
, port
);
750 /* get the io packet from shared memory */
751 state
->send_vcpu
= i
;
752 return cpu_get_ioreq_from_shared_memory(state
, i
);
755 /* read error or read nothing */
759 static uint32_t do_inp(uint32_t addr
, unsigned long size
)
763 return cpu_inb(addr
);
765 return cpu_inw(addr
);
767 return cpu_inl(addr
);
769 hw_error("inp: bad size: %04x %lx", addr
, size
);
773 static void do_outp(uint32_t addr
,
774 unsigned long size
, uint32_t val
)
778 return cpu_outb(addr
, val
);
780 return cpu_outw(addr
, val
);
782 return cpu_outl(addr
, val
);
784 hw_error("outp: bad size: %04x %lx", addr
, size
);
789 * Helper functions which read/write an object from/to physical guest
790 * memory, as part of the implementation of an ioreq.
793 * cpu_physical_memory_rw(addr + (req->df ? -1 : +1) * req->size * i,
794 * val, req->size, 0/1)
795 * except without the integer overflow problems.
797 static void rw_phys_req_item(hwaddr addr
,
798 ioreq_t
*req
, uint32_t i
, void *val
, int rw
)
800 /* Do everything unsigned so overflow just results in a truncated result
801 * and accesses to undesired parts of guest memory, which is up
803 hwaddr offset
= (hwaddr
)req
->size
* i
;
809 cpu_physical_memory_rw(addr
, val
, req
->size
, rw
);
812 static inline void read_phys_req_item(hwaddr addr
,
813 ioreq_t
*req
, uint32_t i
, void *val
)
815 rw_phys_req_item(addr
, req
, i
, val
, 0);
817 static inline void write_phys_req_item(hwaddr addr
,
818 ioreq_t
*req
, uint32_t i
, void *val
)
820 rw_phys_req_item(addr
, req
, i
, val
, 1);
824 static void cpu_ioreq_pio(ioreq_t
*req
)
828 trace_cpu_ioreq_pio(req
, req
->dir
, req
->df
, req
->data_is_ptr
, req
->addr
,
829 req
->data
, req
->count
, req
->size
);
831 if (req
->size
> sizeof(uint32_t)) {
832 hw_error("PIO: bad size (%u)", req
->size
);
835 if (req
->dir
== IOREQ_READ
) {
836 if (!req
->data_is_ptr
) {
837 req
->data
= do_inp(req
->addr
, req
->size
);
838 trace_cpu_ioreq_pio_read_reg(req
, req
->data
, req
->addr
,
843 for (i
= 0; i
< req
->count
; i
++) {
844 tmp
= do_inp(req
->addr
, req
->size
);
845 write_phys_req_item(req
->data
, req
, i
, &tmp
);
848 } else if (req
->dir
== IOREQ_WRITE
) {
849 if (!req
->data_is_ptr
) {
850 trace_cpu_ioreq_pio_write_reg(req
, req
->data
, req
->addr
,
852 do_outp(req
->addr
, req
->size
, req
->data
);
854 for (i
= 0; i
< req
->count
; i
++) {
857 read_phys_req_item(req
->data
, req
, i
, &tmp
);
858 do_outp(req
->addr
, req
->size
, tmp
);
864 static void cpu_ioreq_move(ioreq_t
*req
)
868 trace_cpu_ioreq_move(req
, req
->dir
, req
->df
, req
->data_is_ptr
, req
->addr
,
869 req
->data
, req
->count
, req
->size
);
871 if (req
->size
> sizeof(req
->data
)) {
872 hw_error("MMIO: bad size (%u)", req
->size
);
875 if (!req
->data_is_ptr
) {
876 if (req
->dir
== IOREQ_READ
) {
877 for (i
= 0; i
< req
->count
; i
++) {
878 read_phys_req_item(req
->addr
, req
, i
, &req
->data
);
880 } else if (req
->dir
== IOREQ_WRITE
) {
881 for (i
= 0; i
< req
->count
; i
++) {
882 write_phys_req_item(req
->addr
, req
, i
, &req
->data
);
888 if (req
->dir
== IOREQ_READ
) {
889 for (i
= 0; i
< req
->count
; i
++) {
890 read_phys_req_item(req
->addr
, req
, i
, &tmp
);
891 write_phys_req_item(req
->data
, req
, i
, &tmp
);
893 } else if (req
->dir
== IOREQ_WRITE
) {
894 for (i
= 0; i
< req
->count
; i
++) {
895 read_phys_req_item(req
->data
, req
, i
, &tmp
);
896 write_phys_req_item(req
->addr
, req
, i
, &tmp
);
902 static void regs_to_cpu(vmware_regs_t
*vmport_regs
, ioreq_t
*req
)
907 cpu
= X86_CPU(current_cpu
);
909 env
->regs
[R_EAX
] = req
->data
;
910 env
->regs
[R_EBX
] = vmport_regs
->ebx
;
911 env
->regs
[R_ECX
] = vmport_regs
->ecx
;
912 env
->regs
[R_EDX
] = vmport_regs
->edx
;
913 env
->regs
[R_ESI
] = vmport_regs
->esi
;
914 env
->regs
[R_EDI
] = vmport_regs
->edi
;
917 static void regs_from_cpu(vmware_regs_t
*vmport_regs
)
919 X86CPU
*cpu
= X86_CPU(current_cpu
);
920 CPUX86State
*env
= &cpu
->env
;
922 vmport_regs
->ebx
= env
->regs
[R_EBX
];
923 vmport_regs
->ecx
= env
->regs
[R_ECX
];
924 vmport_regs
->edx
= env
->regs
[R_EDX
];
925 vmport_regs
->esi
= env
->regs
[R_ESI
];
926 vmport_regs
->edi
= env
->regs
[R_EDI
];
929 static void handle_vmport_ioreq(XenIOState
*state
, ioreq_t
*req
)
931 vmware_regs_t
*vmport_regs
;
933 assert(state
->shared_vmport_page
);
935 &state
->shared_vmport_page
->vcpu_vmport_regs
[state
->send_vcpu
];
936 QEMU_BUILD_BUG_ON(sizeof(*req
) < sizeof(*vmport_regs
));
938 current_cpu
= state
->cpu_by_vcpu_id
[state
->send_vcpu
];
939 regs_to_cpu(vmport_regs
, req
);
941 regs_from_cpu(vmport_regs
);
945 static void handle_ioreq(XenIOState
*state
, ioreq_t
*req
)
947 trace_handle_ioreq(req
, req
->type
, req
->dir
, req
->df
, req
->data_is_ptr
,
948 req
->addr
, req
->data
, req
->count
, req
->size
);
950 if (!req
->data_is_ptr
&& (req
->dir
== IOREQ_WRITE
) &&
951 (req
->size
< sizeof (target_ulong
))) {
952 req
->data
&= ((target_ulong
) 1 << (8 * req
->size
)) - 1;
955 if (req
->dir
== IOREQ_WRITE
)
956 trace_handle_ioreq_write(req
, req
->type
, req
->df
, req
->data_is_ptr
,
957 req
->addr
, req
->data
, req
->count
, req
->size
);
963 case IOREQ_TYPE_COPY
:
966 case IOREQ_TYPE_VMWARE_PORT
:
967 handle_vmport_ioreq(state
, req
);
969 case IOREQ_TYPE_TIMEOFFSET
:
971 case IOREQ_TYPE_INVALIDATE
:
972 xen_invalidate_map_cache();
974 case IOREQ_TYPE_PCI_CONFIG
: {
975 uint32_t sbdf
= req
->addr
>> 32;
978 /* Fake a write to port 0xCF8 so that
979 * the config space access will target the
980 * correct device model.
983 ((req
->addr
& 0x0f00) << 16) |
984 ((sbdf
& 0xffff) << 8) |
986 do_outp(0xcf8, 4, val
);
988 /* Now issue the config space access via
991 req
->addr
= 0xcfc | (req
->addr
& 0x03);
996 hw_error("Invalid ioreq type 0x%x\n", req
->type
);
998 if (req
->dir
== IOREQ_READ
) {
999 trace_handle_ioreq_read(req
, req
->type
, req
->df
, req
->data_is_ptr
,
1000 req
->addr
, req
->data
, req
->count
, req
->size
);
1004 static int handle_buffered_iopage(XenIOState
*state
)
1006 buffered_iopage_t
*buf_page
= state
->buffered_io_page
;
1007 buf_ioreq_t
*buf_req
= NULL
;
1015 memset(&req
, 0x00, sizeof(req
));
1016 req
.state
= STATE_IOREQ_READY
;
1018 req
.dir
= IOREQ_WRITE
;
1021 uint32_t rdptr
= buf_page
->read_pointer
, wrptr
;
1024 wrptr
= buf_page
->write_pointer
;
1026 if (rdptr
!= buf_page
->read_pointer
) {
1029 if (rdptr
== wrptr
) {
1032 buf_req
= &buf_page
->buf_ioreq
[rdptr
% IOREQ_BUFFER_SLOT_NUM
];
1033 req
.size
= 1U << buf_req
->size
;
1034 req
.addr
= buf_req
->addr
;
1035 req
.data
= buf_req
->data
;
1036 req
.type
= buf_req
->type
;
1038 qw
= (req
.size
== 8);
1040 if (rdptr
+ 1 == wrptr
) {
1041 hw_error("Incomplete quad word buffered ioreq");
1043 buf_req
= &buf_page
->buf_ioreq
[(rdptr
+ 1) %
1044 IOREQ_BUFFER_SLOT_NUM
];
1045 req
.data
|= ((uint64_t)buf_req
->data
) << 32;
1049 handle_ioreq(state
, &req
);
1051 /* Only req.data may get updated by handle_ioreq(), albeit even that
1052 * should not happen as such data would never make it to the guest (we
1053 * can only usefully see writes here after all).
1055 assert(req
.state
== STATE_IOREQ_READY
);
1056 assert(req
.count
== 1);
1057 assert(req
.dir
== IOREQ_WRITE
);
1058 assert(!req
.data_is_ptr
);
1060 atomic_add(&buf_page
->read_pointer
, qw
+ 1);
1066 static void handle_buffered_io(void *opaque
)
1068 XenIOState
*state
= opaque
;
1070 if (handle_buffered_iopage(state
)) {
1071 timer_mod(state
->buffered_io_timer
,
1072 BUFFER_IO_MAX_DELAY
+ qemu_clock_get_ms(QEMU_CLOCK_REALTIME
));
1074 timer_del(state
->buffered_io_timer
);
1075 xenevtchn_unmask(state
->xce_handle
, state
->bufioreq_local_port
);
1079 static void cpu_handle_ioreq(void *opaque
)
1081 XenIOState
*state
= opaque
;
1082 ioreq_t
*req
= cpu_get_ioreq(state
);
1084 handle_buffered_iopage(state
);
1086 ioreq_t copy
= *req
;
1089 handle_ioreq(state
, ©
);
1090 req
->data
= copy
.data
;
1092 if (req
->state
!= STATE_IOREQ_INPROCESS
) {
1093 fprintf(stderr
, "Badness in I/O request ... not in service?!: "
1094 "%x, ptr: %x, port: %"PRIx64
", "
1095 "data: %"PRIx64
", count: %u, size: %u, type: %u\n",
1096 req
->state
, req
->data_is_ptr
, req
->addr
,
1097 req
->data
, req
->count
, req
->size
, req
->type
);
1098 destroy_hvm_domain(false);
1102 xen_wmb(); /* Update ioreq contents /then/ update state. */
1105 * We do this before we send the response so that the tools
1106 * have the opportunity to pick up on the reset before the
1107 * guest resumes and does a hlt with interrupts disabled which
1108 * causes Xen to powerdown the domain.
1110 if (runstate_is_running()) {
1111 ShutdownCause request
;
1113 if (qemu_shutdown_requested_get()) {
1114 destroy_hvm_domain(false);
1116 request
= qemu_reset_requested_get();
1118 qemu_system_reset(request
);
1119 destroy_hvm_domain(true);
1123 req
->state
= STATE_IORESP_READY
;
1124 xenevtchn_notify(state
->xce_handle
,
1125 state
->ioreq_local_port
[state
->send_vcpu
]);
1129 static void xen_main_loop_prepare(XenIOState
*state
)
1133 if (state
->xce_handle
!= NULL
) {
1134 evtchn_fd
= xenevtchn_fd(state
->xce_handle
);
1137 state
->buffered_io_timer
= timer_new_ms(QEMU_CLOCK_REALTIME
, handle_buffered_io
,
1140 if (evtchn_fd
!= -1) {
1141 CPUState
*cpu_state
;
1143 DPRINTF("%s: Init cpu_by_vcpu_id\n", __func__
);
1144 CPU_FOREACH(cpu_state
) {
1145 DPRINTF("%s: cpu_by_vcpu_id[%d]=%p\n",
1146 __func__
, cpu_state
->cpu_index
, cpu_state
);
1147 state
->cpu_by_vcpu_id
[cpu_state
->cpu_index
] = cpu_state
;
1149 qemu_set_fd_handler(evtchn_fd
, cpu_handle_ioreq
, NULL
, state
);
1154 static void xen_hvm_change_state_handler(void *opaque
, int running
,
1157 XenIOState
*state
= opaque
;
1160 xen_main_loop_prepare(state
);
1163 xen_set_ioreq_server_state(xen_domid
,
1165 (rstate
== RUN_STATE_RUNNING
));
1168 static void xen_exit_notifier(Notifier
*n
, void *data
)
1170 XenIOState
*state
= container_of(n
, XenIOState
, exit
);
1172 xenevtchn_close(state
->xce_handle
);
1173 xs_daemon_close(state
->xenstore
);
1176 #ifdef XEN_COMPAT_PHYSMAP
1177 static void xen_read_physmap(XenIOState
*state
)
1179 XenPhysmap
*physmap
= NULL
;
1180 unsigned int len
, num
, i
;
1181 char path
[80], *value
= NULL
;
1182 char **entries
= NULL
;
1184 snprintf(path
, sizeof(path
),
1185 "/local/domain/0/device-model/%d/physmap", xen_domid
);
1186 entries
= xs_directory(state
->xenstore
, 0, path
, &num
);
1187 if (entries
== NULL
)
1190 for (i
= 0; i
< num
; i
++) {
1191 physmap
= g_malloc(sizeof (XenPhysmap
));
1192 physmap
->phys_offset
= strtoull(entries
[i
], NULL
, 16);
1193 snprintf(path
, sizeof(path
),
1194 "/local/domain/0/device-model/%d/physmap/%s/start_addr",
1195 xen_domid
, entries
[i
]);
1196 value
= xs_read(state
->xenstore
, 0, path
, &len
);
1197 if (value
== NULL
) {
1201 physmap
->start_addr
= strtoull(value
, NULL
, 16);
1204 snprintf(path
, sizeof(path
),
1205 "/local/domain/0/device-model/%d/physmap/%s/size",
1206 xen_domid
, entries
[i
]);
1207 value
= xs_read(state
->xenstore
, 0, path
, &len
);
1208 if (value
== NULL
) {
1212 physmap
->size
= strtoull(value
, NULL
, 16);
1215 snprintf(path
, sizeof(path
),
1216 "/local/domain/0/device-model/%d/physmap/%s/name",
1217 xen_domid
, entries
[i
]);
1218 physmap
->name
= xs_read(state
->xenstore
, 0, path
, &len
);
1220 QLIST_INSERT_HEAD(&state
->physmap
, physmap
, list
);
1225 static void xen_read_physmap(XenIOState
*state
)
1230 static void xen_wakeup_notifier(Notifier
*notifier
, void *data
)
1232 xc_set_hvm_param(xen_xc
, xen_domid
, HVM_PARAM_ACPI_S_STATE
, 0);
1235 void xen_hvm_init(PCMachineState
*pcms
, MemoryRegion
**ram_memory
)
1238 xen_pfn_t ioreq_pfn
;
1239 xen_pfn_t bufioreq_pfn
;
1240 evtchn_port_t bufioreq_evtchn
;
1243 state
= g_malloc0(sizeof (XenIOState
));
1245 state
->xce_handle
= xenevtchn_open(NULL
, 0);
1246 if (state
->xce_handle
== NULL
) {
1247 perror("xen: event channel open");
1251 state
->xenstore
= xs_daemon_open();
1252 if (state
->xenstore
== NULL
) {
1253 perror("xen: xenstore open");
1257 if (xen_domid_restrict
) {
1258 rc
= xen_restrict(xen_domid
);
1260 error_report("failed to restrict: error %d", errno
);
1265 xen_create_ioreq_server(xen_domid
, &state
->ioservid
);
1267 state
->exit
.notify
= xen_exit_notifier
;
1268 qemu_add_exit_notifier(&state
->exit
);
1270 state
->suspend
.notify
= xen_suspend_notifier
;
1271 qemu_register_suspend_notifier(&state
->suspend
);
1273 state
->wakeup
.notify
= xen_wakeup_notifier
;
1274 qemu_register_wakeup_notifier(&state
->wakeup
);
1276 rc
= xen_get_ioreq_server_info(xen_domid
, state
->ioservid
,
1277 &ioreq_pfn
, &bufioreq_pfn
,
1280 error_report("failed to get ioreq server info: error %d handle=%p",
1285 DPRINTF("shared page at pfn %lx\n", ioreq_pfn
);
1286 DPRINTF("buffered io page at pfn %lx\n", bufioreq_pfn
);
1287 DPRINTF("buffered io evtchn is %x\n", bufioreq_evtchn
);
1289 state
->shared_page
= xenforeignmemory_map(xen_fmem
, xen_domid
,
1290 PROT_READ
|PROT_WRITE
,
1291 1, &ioreq_pfn
, NULL
);
1292 if (state
->shared_page
== NULL
) {
1293 error_report("map shared IO page returned error %d handle=%p",
1298 rc
= xen_get_vmport_regs_pfn(xen_xc
, xen_domid
, &ioreq_pfn
);
1300 DPRINTF("shared vmport page at pfn %lx\n", ioreq_pfn
);
1301 state
->shared_vmport_page
=
1302 xenforeignmemory_map(xen_fmem
, xen_domid
, PROT_READ
|PROT_WRITE
,
1303 1, &ioreq_pfn
, NULL
);
1304 if (state
->shared_vmport_page
== NULL
) {
1305 error_report("map shared vmport IO page returned error %d handle=%p",
1309 } else if (rc
!= -ENOSYS
) {
1310 error_report("get vmport regs pfn returned error %d, rc=%d",
1315 state
->buffered_io_page
= xenforeignmemory_map(xen_fmem
, xen_domid
,
1316 PROT_READ
|PROT_WRITE
,
1317 1, &bufioreq_pfn
, NULL
);
1318 if (state
->buffered_io_page
== NULL
) {
1319 error_report("map buffered IO page returned error %d", errno
);
1323 /* Note: cpus is empty at this point in init */
1324 state
->cpu_by_vcpu_id
= g_malloc0(max_cpus
* sizeof(CPUState
*));
1326 rc
= xen_set_ioreq_server_state(xen_domid
, state
->ioservid
, true);
1328 error_report("failed to enable ioreq server info: error %d handle=%p",
1333 state
->ioreq_local_port
= g_malloc0(max_cpus
* sizeof (evtchn_port_t
));
1335 /* FIXME: how about if we overflow the page here? */
1336 for (i
= 0; i
< max_cpus
; i
++) {
1337 rc
= xenevtchn_bind_interdomain(state
->xce_handle
, xen_domid
,
1338 xen_vcpu_eport(state
->shared_page
, i
));
1340 error_report("shared evtchn %d bind error %d", i
, errno
);
1343 state
->ioreq_local_port
[i
] = rc
;
1346 rc
= xenevtchn_bind_interdomain(state
->xce_handle
, xen_domid
,
1349 error_report("buffered evtchn bind error %d", errno
);
1352 state
->bufioreq_local_port
= rc
;
1354 /* Init RAM management */
1355 #ifdef XEN_COMPAT_PHYSMAP
1356 xen_map_cache_init(xen_phys_offset_to_gaddr
, state
);
1358 xen_map_cache_init(NULL
, state
);
1360 xen_ram_init(pcms
, ram_size
, ram_memory
);
1362 qemu_add_vm_change_state_handler(xen_hvm_change_state_handler
, state
);
1364 state
->memory_listener
= xen_memory_listener
;
1365 QLIST_INIT(&state
->physmap
);
1366 memory_listener_register(&state
->memory_listener
, &address_space_memory
);
1367 state
->log_for_dirtybit
= NULL
;
1369 state
->io_listener
= xen_io_listener
;
1370 memory_listener_register(&state
->io_listener
, &address_space_io
);
1372 state
->device_listener
= xen_device_listener
;
1373 device_listener_register(&state
->device_listener
);
1375 /* Initialize backend core & drivers */
1376 if (xen_be_init() != 0) {
1377 error_report("xen backend core setup failed");
1380 xen_be_register_common();
1381 xen_read_physmap(state
);
1383 /* Disable ACPI build because Xen handles it */
1384 pcms
->acpi_build_enabled
= false;
1389 error_report("xen hardware virtual machine initialisation failed");
1393 void destroy_hvm_domain(bool reboot
)
1395 xc_interface
*xc_handle
;
1398 xc_handle
= xc_interface_open(0, 0, 0);
1399 if (xc_handle
== NULL
) {
1400 fprintf(stderr
, "Cannot acquire xenctrl handle\n");
1402 sts
= xc_domain_shutdown(xc_handle
, xen_domid
,
1403 reboot
? SHUTDOWN_reboot
: SHUTDOWN_poweroff
);
1405 fprintf(stderr
, "xc_domain_shutdown failed to issue %s, "
1406 "sts %d, %s\n", reboot
? "reboot" : "poweroff",
1407 sts
, strerror(errno
));
1409 fprintf(stderr
, "Issued domain %d %s\n", xen_domid
,
1410 reboot
? "reboot" : "poweroff");
1412 xc_interface_close(xc_handle
);
1416 void xen_register_framebuffer(MemoryRegion
*mr
)
1421 void xen_shutdown_fatal_error(const char *fmt
, ...)
1426 vfprintf(stderr
, fmt
, ap
);
1428 fprintf(stderr
, "Will destroy the domain.\n");
1429 /* destroy the domain */
1430 qemu_system_shutdown_request(SHUTDOWN_CAUSE_HOST_ERROR
);
1433 void xen_hvm_modified_memory(ram_addr_t start
, ram_addr_t length
)
1435 if (unlikely(xen_in_migration
)) {
1437 ram_addr_t start_pfn
, nb_pages
;
1440 length
= TARGET_PAGE_SIZE
;
1442 start_pfn
= start
>> TARGET_PAGE_BITS
;
1443 nb_pages
= ((start
+ length
+ TARGET_PAGE_SIZE
- 1) >> TARGET_PAGE_BITS
)
1445 rc
= xen_modified_memory(xen_domid
, start_pfn
, nb_pages
);
1448 "%s failed for "RAM_ADDR_FMT
" ("RAM_ADDR_FMT
"): %i, %s\n",
1449 __func__
, start
, nb_pages
, errno
, strerror(errno
));
1454 void qmp_xen_set_global_dirty_log(bool enable
, Error
**errp
)
1457 memory_global_dirty_log_start();
1459 memory_global_dirty_log_stop();