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 "qmp-commands.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
;
218 vmstate_register_ram_global(&ram_memory
);
220 memory_region_init_alias(&ram_640k
, NULL
, "xen.ram.640k",
221 &ram_memory
, 0, 0xa0000);
222 memory_region_add_subregion(sysmem
, 0, &ram_640k
);
223 /* Skip of the VGA IO memory space, it will be registered later by the VGA
226 * The area between 0xc0000 and 0x100000 will be used by SeaBIOS to load
227 * the Options ROM, so it is registered here as RAM.
229 memory_region_init_alias(&ram_lo
, NULL
, "xen.ram.lo",
230 &ram_memory
, 0xc0000,
231 pcms
->below_4g_mem_size
- 0xc0000);
232 memory_region_add_subregion(sysmem
, 0xc0000, &ram_lo
);
233 if (pcms
->above_4g_mem_size
> 0) {
234 memory_region_init_alias(&ram_hi
, NULL
, "xen.ram.hi",
235 &ram_memory
, 0x100000000ULL
,
236 pcms
->above_4g_mem_size
);
237 memory_region_add_subregion(sysmem
, 0x100000000ULL
, &ram_hi
);
241 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 error_setg(errp
, "xen: failed to populate ram at " RAM_ADDR_FMT
,
277 static XenPhysmap
*get_physmapping(XenIOState
*state
,
278 hwaddr start_addr
, ram_addr_t size
)
280 XenPhysmap
*physmap
= NULL
;
282 start_addr
&= TARGET_PAGE_MASK
;
284 QLIST_FOREACH(physmap
, &state
->physmap
, list
) {
285 if (range_covers_byte(physmap
->start_addr
, physmap
->size
, start_addr
)) {
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_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
= xen_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 (errno: %d)\n", idx
, gpfn
, rc
, errno
);
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
= xen_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 (errno: %d)\n", idx
, gpfn
, rc
, errno
);
433 QLIST_REMOVE(physmap
, list
);
434 if (state
->log_for_dirtybit
== physmap
) {
435 state
->log_for_dirtybit
= NULL
;
442 static void xen_set_memory(struct MemoryListener
*listener
,
443 MemoryRegionSection
*section
,
446 XenIOState
*state
= container_of(listener
, XenIOState
, memory_listener
);
447 hwaddr start_addr
= section
->offset_within_address_space
;
448 ram_addr_t size
= int128_get64(section
->size
);
449 bool log_dirty
= memory_region_is_logging(section
->mr
, DIRTY_MEMORY_VGA
);
450 hvmmem_type_t mem_type
;
452 if (section
->mr
== &ram_memory
) {
456 xen_map_memory_section(xen_domid
, state
->ioservid
,
459 xen_unmap_memory_section(xen_domid
, state
->ioservid
,
464 if (!memory_region_is_ram(section
->mr
)) {
468 if (log_dirty
!= add
) {
472 trace_xen_client_set_memory(start_addr
, size
, log_dirty
);
474 start_addr
&= TARGET_PAGE_MASK
;
475 size
= TARGET_PAGE_ALIGN(size
);
478 if (!memory_region_is_rom(section
->mr
)) {
479 xen_add_to_physmap(state
, start_addr
, size
,
480 section
->mr
, section
->offset_within_region
);
482 mem_type
= HVMMEM_ram_ro
;
483 if (xen_set_mem_type(xen_domid
, mem_type
,
484 start_addr
>> TARGET_PAGE_BITS
,
485 size
>> TARGET_PAGE_BITS
)) {
486 DPRINTF("xen_set_mem_type error, addr: "TARGET_FMT_plx
"\n",
491 if (xen_remove_from_physmap(state
, start_addr
, size
) < 0) {
492 DPRINTF("physmapping does not exist at "TARGET_FMT_plx
"\n", start_addr
);
497 static void xen_region_add(MemoryListener
*listener
,
498 MemoryRegionSection
*section
)
500 memory_region_ref(section
->mr
);
501 xen_set_memory(listener
, section
, true);
504 static void xen_region_del(MemoryListener
*listener
,
505 MemoryRegionSection
*section
)
507 xen_set_memory(listener
, section
, false);
508 memory_region_unref(section
->mr
);
511 static void xen_io_add(MemoryListener
*listener
,
512 MemoryRegionSection
*section
)
514 XenIOState
*state
= container_of(listener
, XenIOState
, io_listener
);
515 MemoryRegion
*mr
= section
->mr
;
517 if (mr
->ops
== &unassigned_io_ops
) {
521 memory_region_ref(mr
);
523 xen_map_io_section(xen_domid
, state
->ioservid
, section
);
526 static void xen_io_del(MemoryListener
*listener
,
527 MemoryRegionSection
*section
)
529 XenIOState
*state
= container_of(listener
, XenIOState
, io_listener
);
530 MemoryRegion
*mr
= section
->mr
;
532 if (mr
->ops
== &unassigned_io_ops
) {
536 xen_unmap_io_section(xen_domid
, state
->ioservid
, section
);
538 memory_region_unref(mr
);
541 static void xen_device_realize(DeviceListener
*listener
,
544 XenIOState
*state
= container_of(listener
, XenIOState
, device_listener
);
546 if (object_dynamic_cast(OBJECT(dev
), TYPE_PCI_DEVICE
)) {
547 PCIDevice
*pci_dev
= PCI_DEVICE(dev
);
549 xen_map_pcidev(xen_domid
, state
->ioservid
, pci_dev
);
553 static void xen_device_unrealize(DeviceListener
*listener
,
556 XenIOState
*state
= container_of(listener
, XenIOState
, device_listener
);
558 if (object_dynamic_cast(OBJECT(dev
), TYPE_PCI_DEVICE
)) {
559 PCIDevice
*pci_dev
= PCI_DEVICE(dev
);
561 xen_unmap_pcidev(xen_domid
, state
->ioservid
, pci_dev
);
565 static void xen_sync_dirty_bitmap(XenIOState
*state
,
569 hwaddr npages
= size
>> TARGET_PAGE_BITS
;
570 const int width
= sizeof(unsigned long) * 8;
571 unsigned long bitmap
[DIV_ROUND_UP(npages
, width
)];
573 const XenPhysmap
*physmap
= NULL
;
575 physmap
= get_physmapping(state
, start_addr
, size
);
576 if (physmap
== NULL
) {
581 if (state
->log_for_dirtybit
== NULL
) {
582 state
->log_for_dirtybit
= physmap
;
583 } else if (state
->log_for_dirtybit
!= physmap
) {
584 /* Only one range for dirty bitmap can be tracked. */
588 rc
= xen_track_dirty_vram(xen_domid
, start_addr
>> TARGET_PAGE_BITS
,
592 #define ENODATA ENOENT
594 if (errno
== ENODATA
) {
595 memory_region_set_dirty(framebuffer
, 0, size
);
596 DPRINTF("xen: track_dirty_vram failed (0x" TARGET_FMT_plx
597 ", 0x" TARGET_FMT_plx
"): %s\n",
598 start_addr
, start_addr
+ size
, strerror(errno
));
603 for (i
= 0; i
< ARRAY_SIZE(bitmap
); i
++) {
604 unsigned long map
= bitmap
[i
];
608 memory_region_set_dirty(framebuffer
,
609 (i
* width
+ j
) * TARGET_PAGE_SIZE
,
615 static void xen_log_start(MemoryListener
*listener
,
616 MemoryRegionSection
*section
,
619 XenIOState
*state
= container_of(listener
, XenIOState
, memory_listener
);
621 if (new & ~old
& (1 << DIRTY_MEMORY_VGA
)) {
622 xen_sync_dirty_bitmap(state
, section
->offset_within_address_space
,
623 int128_get64(section
->size
));
627 static void xen_log_stop(MemoryListener
*listener
, MemoryRegionSection
*section
,
630 XenIOState
*state
= container_of(listener
, XenIOState
, memory_listener
);
632 if (old
& ~new & (1 << DIRTY_MEMORY_VGA
)) {
633 state
->log_for_dirtybit
= NULL
;
634 /* Disable dirty bit tracking */
635 xen_track_dirty_vram(xen_domid
, 0, 0, NULL
);
639 static void xen_log_sync(MemoryListener
*listener
, MemoryRegionSection
*section
)
641 XenIOState
*state
= container_of(listener
, XenIOState
, memory_listener
);
643 xen_sync_dirty_bitmap(state
, section
->offset_within_address_space
,
644 int128_get64(section
->size
));
647 static void xen_log_global_start(MemoryListener
*listener
)
650 xen_in_migration
= true;
654 static void xen_log_global_stop(MemoryListener
*listener
)
656 xen_in_migration
= false;
659 static MemoryListener xen_memory_listener
= {
660 .region_add
= xen_region_add
,
661 .region_del
= xen_region_del
,
662 .log_start
= xen_log_start
,
663 .log_stop
= xen_log_stop
,
664 .log_sync
= xen_log_sync
,
665 .log_global_start
= xen_log_global_start
,
666 .log_global_stop
= xen_log_global_stop
,
670 static MemoryListener xen_io_listener
= {
671 .region_add
= xen_io_add
,
672 .region_del
= xen_io_del
,
676 static DeviceListener xen_device_listener
= {
677 .realize
= xen_device_realize
,
678 .unrealize
= xen_device_unrealize
,
681 /* get the ioreq packets from share mem */
682 static ioreq_t
*cpu_get_ioreq_from_shared_memory(XenIOState
*state
, int vcpu
)
684 ioreq_t
*req
= xen_vcpu_ioreq(state
->shared_page
, vcpu
);
686 if (req
->state
!= STATE_IOREQ_READY
) {
687 DPRINTF("I/O request not ready: "
688 "%x, ptr: %x, port: %"PRIx64
", "
689 "data: %"PRIx64
", count: %u, size: %u\n",
690 req
->state
, req
->data_is_ptr
, req
->addr
,
691 req
->data
, req
->count
, req
->size
);
695 xen_rmb(); /* see IOREQ_READY /then/ read contents of ioreq */
697 req
->state
= STATE_IOREQ_INPROCESS
;
701 /* use poll to get the port notification */
702 /* ioreq_vec--out,the */
703 /* retval--the number of ioreq packet */
704 static ioreq_t
*cpu_get_ioreq(XenIOState
*state
)
709 port
= xenevtchn_pending(state
->xce_handle
);
710 if (port
== state
->bufioreq_local_port
) {
711 timer_mod(state
->buffered_io_timer
,
712 BUFFER_IO_MAX_DELAY
+ qemu_clock_get_ms(QEMU_CLOCK_REALTIME
));
717 for (i
= 0; i
< max_cpus
; i
++) {
718 if (state
->ioreq_local_port
[i
] == port
) {
724 hw_error("Fatal error while trying to get io event!\n");
727 /* unmask the wanted port again */
728 xenevtchn_unmask(state
->xce_handle
, port
);
730 /* get the io packet from shared memory */
731 state
->send_vcpu
= i
;
732 return cpu_get_ioreq_from_shared_memory(state
, i
);
735 /* read error or read nothing */
739 static uint32_t do_inp(uint32_t addr
, unsigned long size
)
743 return cpu_inb(addr
);
745 return cpu_inw(addr
);
747 return cpu_inl(addr
);
749 hw_error("inp: bad size: %04x %lx", addr
, size
);
753 static void do_outp(uint32_t addr
,
754 unsigned long size
, uint32_t val
)
758 return cpu_outb(addr
, val
);
760 return cpu_outw(addr
, val
);
762 return cpu_outl(addr
, val
);
764 hw_error("outp: bad size: %04x %lx", addr
, size
);
769 * Helper functions which read/write an object from/to physical guest
770 * memory, as part of the implementation of an ioreq.
773 * cpu_physical_memory_rw(addr + (req->df ? -1 : +1) * req->size * i,
774 * val, req->size, 0/1)
775 * except without the integer overflow problems.
777 static void rw_phys_req_item(hwaddr addr
,
778 ioreq_t
*req
, uint32_t i
, void *val
, int rw
)
780 /* Do everything unsigned so overflow just results in a truncated result
781 * and accesses to undesired parts of guest memory, which is up
783 hwaddr offset
= (hwaddr
)req
->size
* i
;
789 cpu_physical_memory_rw(addr
, val
, req
->size
, rw
);
792 static inline void read_phys_req_item(hwaddr addr
,
793 ioreq_t
*req
, uint32_t i
, void *val
)
795 rw_phys_req_item(addr
, req
, i
, val
, 0);
797 static inline void write_phys_req_item(hwaddr addr
,
798 ioreq_t
*req
, uint32_t i
, void *val
)
800 rw_phys_req_item(addr
, req
, i
, val
, 1);
804 static void cpu_ioreq_pio(ioreq_t
*req
)
808 trace_cpu_ioreq_pio(req
, req
->dir
, req
->df
, req
->data_is_ptr
, req
->addr
,
809 req
->data
, req
->count
, req
->size
);
811 if (req
->size
> sizeof(uint32_t)) {
812 hw_error("PIO: bad size (%u)", req
->size
);
815 if (req
->dir
== IOREQ_READ
) {
816 if (!req
->data_is_ptr
) {
817 req
->data
= do_inp(req
->addr
, req
->size
);
818 trace_cpu_ioreq_pio_read_reg(req
, req
->data
, req
->addr
,
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 trace_cpu_ioreq_pio_write_reg(req
, req
->data
, req
->addr
,
832 do_outp(req
->addr
, req
->size
, req
->data
);
834 for (i
= 0; i
< req
->count
; i
++) {
837 read_phys_req_item(req
->data
, req
, i
, &tmp
);
838 do_outp(req
->addr
, req
->size
, tmp
);
844 static void cpu_ioreq_move(ioreq_t
*req
)
848 trace_cpu_ioreq_move(req
, req
->dir
, req
->df
, req
->data_is_ptr
, req
->addr
,
849 req
->data
, req
->count
, req
->size
);
851 if (req
->size
> sizeof(req
->data
)) {
852 hw_error("MMIO: bad size (%u)", req
->size
);
855 if (!req
->data_is_ptr
) {
856 if (req
->dir
== IOREQ_READ
) {
857 for (i
= 0; i
< req
->count
; i
++) {
858 read_phys_req_item(req
->addr
, req
, i
, &req
->data
);
860 } else if (req
->dir
== IOREQ_WRITE
) {
861 for (i
= 0; i
< req
->count
; i
++) {
862 write_phys_req_item(req
->addr
, req
, i
, &req
->data
);
868 if (req
->dir
== IOREQ_READ
) {
869 for (i
= 0; i
< req
->count
; i
++) {
870 read_phys_req_item(req
->addr
, req
, i
, &tmp
);
871 write_phys_req_item(req
->data
, req
, i
, &tmp
);
873 } else if (req
->dir
== IOREQ_WRITE
) {
874 for (i
= 0; i
< req
->count
; i
++) {
875 read_phys_req_item(req
->data
, req
, i
, &tmp
);
876 write_phys_req_item(req
->addr
, req
, i
, &tmp
);
882 static void regs_to_cpu(vmware_regs_t
*vmport_regs
, ioreq_t
*req
)
887 cpu
= X86_CPU(current_cpu
);
889 env
->regs
[R_EAX
] = req
->data
;
890 env
->regs
[R_EBX
] = vmport_regs
->ebx
;
891 env
->regs
[R_ECX
] = vmport_regs
->ecx
;
892 env
->regs
[R_EDX
] = vmport_regs
->edx
;
893 env
->regs
[R_ESI
] = vmport_regs
->esi
;
894 env
->regs
[R_EDI
] = vmport_regs
->edi
;
897 static void regs_from_cpu(vmware_regs_t
*vmport_regs
)
899 X86CPU
*cpu
= X86_CPU(current_cpu
);
900 CPUX86State
*env
= &cpu
->env
;
902 vmport_regs
->ebx
= env
->regs
[R_EBX
];
903 vmport_regs
->ecx
= env
->regs
[R_ECX
];
904 vmport_regs
->edx
= env
->regs
[R_EDX
];
905 vmport_regs
->esi
= env
->regs
[R_ESI
];
906 vmport_regs
->edi
= env
->regs
[R_EDI
];
909 static void handle_vmport_ioreq(XenIOState
*state
, ioreq_t
*req
)
911 vmware_regs_t
*vmport_regs
;
913 assert(state
->shared_vmport_page
);
915 &state
->shared_vmport_page
->vcpu_vmport_regs
[state
->send_vcpu
];
916 QEMU_BUILD_BUG_ON(sizeof(*req
) < sizeof(*vmport_regs
));
918 current_cpu
= state
->cpu_by_vcpu_id
[state
->send_vcpu
];
919 regs_to_cpu(vmport_regs
, req
);
921 regs_from_cpu(vmport_regs
);
925 static void handle_ioreq(XenIOState
*state
, ioreq_t
*req
)
927 trace_handle_ioreq(req
, req
->type
, req
->dir
, req
->df
, req
->data_is_ptr
,
928 req
->addr
, req
->data
, req
->count
, req
->size
);
930 if (!req
->data_is_ptr
&& (req
->dir
== IOREQ_WRITE
) &&
931 (req
->size
< sizeof (target_ulong
))) {
932 req
->data
&= ((target_ulong
) 1 << (8 * req
->size
)) - 1;
935 if (req
->dir
== IOREQ_WRITE
)
936 trace_handle_ioreq_write(req
, req
->type
, req
->df
, req
->data_is_ptr
,
937 req
->addr
, req
->data
, req
->count
, req
->size
);
943 case IOREQ_TYPE_COPY
:
946 case IOREQ_TYPE_VMWARE_PORT
:
947 handle_vmport_ioreq(state
, req
);
949 case IOREQ_TYPE_TIMEOFFSET
:
951 case IOREQ_TYPE_INVALIDATE
:
952 xen_invalidate_map_cache();
954 case IOREQ_TYPE_PCI_CONFIG
: {
955 uint32_t sbdf
= req
->addr
>> 32;
958 /* Fake a write to port 0xCF8 so that
959 * the config space access will target the
960 * correct device model.
963 ((req
->addr
& 0x0f00) << 16) |
964 ((sbdf
& 0xffff) << 8) |
966 do_outp(0xcf8, 4, val
);
968 /* Now issue the config space access via
971 req
->addr
= 0xcfc | (req
->addr
& 0x03);
976 hw_error("Invalid ioreq type 0x%x\n", req
->type
);
978 if (req
->dir
== IOREQ_READ
) {
979 trace_handle_ioreq_read(req
, req
->type
, req
->df
, req
->data_is_ptr
,
980 req
->addr
, req
->data
, req
->count
, req
->size
);
984 static int handle_buffered_iopage(XenIOState
*state
)
986 buffered_iopage_t
*buf_page
= state
->buffered_io_page
;
987 buf_ioreq_t
*buf_req
= NULL
;
995 memset(&req
, 0x00, sizeof(req
));
996 req
.state
= STATE_IOREQ_READY
;
998 req
.dir
= IOREQ_WRITE
;
1001 uint32_t rdptr
= buf_page
->read_pointer
, wrptr
;
1004 wrptr
= buf_page
->write_pointer
;
1006 if (rdptr
!= buf_page
->read_pointer
) {
1009 if (rdptr
== wrptr
) {
1012 buf_req
= &buf_page
->buf_ioreq
[rdptr
% IOREQ_BUFFER_SLOT_NUM
];
1013 req
.size
= 1U << buf_req
->size
;
1014 req
.addr
= buf_req
->addr
;
1015 req
.data
= buf_req
->data
;
1016 req
.type
= buf_req
->type
;
1018 qw
= (req
.size
== 8);
1020 if (rdptr
+ 1 == wrptr
) {
1021 hw_error("Incomplete quad word buffered ioreq");
1023 buf_req
= &buf_page
->buf_ioreq
[(rdptr
+ 1) %
1024 IOREQ_BUFFER_SLOT_NUM
];
1025 req
.data
|= ((uint64_t)buf_req
->data
) << 32;
1029 handle_ioreq(state
, &req
);
1031 /* Only req.data may get updated by handle_ioreq(), albeit even that
1032 * should not happen as such data would never make it to the guest (we
1033 * can only usefully see writes here after all).
1035 assert(req
.state
== STATE_IOREQ_READY
);
1036 assert(req
.count
== 1);
1037 assert(req
.dir
== IOREQ_WRITE
);
1038 assert(!req
.data_is_ptr
);
1040 atomic_add(&buf_page
->read_pointer
, qw
+ 1);
1046 static void handle_buffered_io(void *opaque
)
1048 XenIOState
*state
= opaque
;
1050 if (handle_buffered_iopage(state
)) {
1051 timer_mod(state
->buffered_io_timer
,
1052 BUFFER_IO_MAX_DELAY
+ qemu_clock_get_ms(QEMU_CLOCK_REALTIME
));
1054 timer_del(state
->buffered_io_timer
);
1055 xenevtchn_unmask(state
->xce_handle
, state
->bufioreq_local_port
);
1059 static void cpu_handle_ioreq(void *opaque
)
1061 XenIOState
*state
= opaque
;
1062 ioreq_t
*req
= cpu_get_ioreq(state
);
1064 handle_buffered_iopage(state
);
1066 ioreq_t copy
= *req
;
1069 handle_ioreq(state
, ©
);
1070 req
->data
= copy
.data
;
1072 if (req
->state
!= STATE_IOREQ_INPROCESS
) {
1073 fprintf(stderr
, "Badness in I/O request ... not in service?!: "
1074 "%x, ptr: %x, port: %"PRIx64
", "
1075 "data: %"PRIx64
", count: %u, size: %u, type: %u\n",
1076 req
->state
, req
->data_is_ptr
, req
->addr
,
1077 req
->data
, req
->count
, req
->size
, req
->type
);
1078 destroy_hvm_domain(false);
1082 xen_wmb(); /* Update ioreq contents /then/ update state. */
1085 * We do this before we send the response so that the tools
1086 * have the opportunity to pick up on the reset before the
1087 * guest resumes and does a hlt with interrupts disabled which
1088 * causes Xen to powerdown the domain.
1090 if (runstate_is_running()) {
1091 ShutdownCause request
;
1093 if (qemu_shutdown_requested_get()) {
1094 destroy_hvm_domain(false);
1096 request
= qemu_reset_requested_get();
1098 qemu_system_reset(request
);
1099 destroy_hvm_domain(true);
1103 req
->state
= STATE_IORESP_READY
;
1104 xenevtchn_notify(state
->xce_handle
,
1105 state
->ioreq_local_port
[state
->send_vcpu
]);
1109 static void xen_main_loop_prepare(XenIOState
*state
)
1113 if (state
->xce_handle
!= NULL
) {
1114 evtchn_fd
= xenevtchn_fd(state
->xce_handle
);
1117 state
->buffered_io_timer
= timer_new_ms(QEMU_CLOCK_REALTIME
, handle_buffered_io
,
1120 if (evtchn_fd
!= -1) {
1121 CPUState
*cpu_state
;
1123 DPRINTF("%s: Init cpu_by_vcpu_id\n", __func__
);
1124 CPU_FOREACH(cpu_state
) {
1125 DPRINTF("%s: cpu_by_vcpu_id[%d]=%p\n",
1126 __func__
, cpu_state
->cpu_index
, cpu_state
);
1127 state
->cpu_by_vcpu_id
[cpu_state
->cpu_index
] = cpu_state
;
1129 qemu_set_fd_handler(evtchn_fd
, cpu_handle_ioreq
, NULL
, state
);
1134 static void xen_hvm_change_state_handler(void *opaque
, int running
,
1137 XenIOState
*state
= opaque
;
1140 xen_main_loop_prepare(state
);
1143 xen_set_ioreq_server_state(xen_domid
,
1145 (rstate
== RUN_STATE_RUNNING
));
1148 static void xen_exit_notifier(Notifier
*n
, void *data
)
1150 XenIOState
*state
= container_of(n
, XenIOState
, exit
);
1152 xenevtchn_close(state
->xce_handle
);
1153 xs_daemon_close(state
->xenstore
);
1156 static void xen_read_physmap(XenIOState
*state
)
1158 XenPhysmap
*physmap
= NULL
;
1159 unsigned int len
, num
, i
;
1160 char path
[80], *value
= NULL
;
1161 char **entries
= NULL
;
1163 snprintf(path
, sizeof(path
),
1164 "/local/domain/0/device-model/%d/physmap", xen_domid
);
1165 entries
= xs_directory(state
->xenstore
, 0, path
, &num
);
1166 if (entries
== NULL
)
1169 for (i
= 0; i
< num
; i
++) {
1170 physmap
= g_malloc(sizeof (XenPhysmap
));
1171 physmap
->phys_offset
= strtoull(entries
[i
], NULL
, 16);
1172 snprintf(path
, sizeof(path
),
1173 "/local/domain/0/device-model/%d/physmap/%s/start_addr",
1174 xen_domid
, entries
[i
]);
1175 value
= xs_read(state
->xenstore
, 0, path
, &len
);
1176 if (value
== NULL
) {
1180 physmap
->start_addr
= strtoull(value
, NULL
, 16);
1183 snprintf(path
, sizeof(path
),
1184 "/local/domain/0/device-model/%d/physmap/%s/size",
1185 xen_domid
, entries
[i
]);
1186 value
= xs_read(state
->xenstore
, 0, path
, &len
);
1187 if (value
== NULL
) {
1191 physmap
->size
= strtoull(value
, NULL
, 16);
1194 snprintf(path
, sizeof(path
),
1195 "/local/domain/0/device-model/%d/physmap/%s/name",
1196 xen_domid
, entries
[i
]);
1197 physmap
->name
= xs_read(state
->xenstore
, 0, path
, &len
);
1199 QLIST_INSERT_HEAD(&state
->physmap
, physmap
, list
);
1204 static void xen_wakeup_notifier(Notifier
*notifier
, void *data
)
1206 xc_set_hvm_param(xen_xc
, xen_domid
, HVM_PARAM_ACPI_S_STATE
, 0);
1209 void xen_hvm_init(PCMachineState
*pcms
, MemoryRegion
**ram_memory
)
1212 xen_pfn_t ioreq_pfn
;
1213 xen_pfn_t bufioreq_pfn
;
1214 evtchn_port_t bufioreq_evtchn
;
1217 state
= g_malloc0(sizeof (XenIOState
));
1219 state
->xce_handle
= xenevtchn_open(NULL
, 0);
1220 if (state
->xce_handle
== NULL
) {
1221 perror("xen: event channel open");
1225 state
->xenstore
= xs_daemon_open();
1226 if (state
->xenstore
== NULL
) {
1227 perror("xen: xenstore open");
1231 if (xen_domid_restrict
) {
1232 rc
= xen_restrict(xen_domid
);
1234 error_report("failed to restrict: error %d", errno
);
1239 xen_create_ioreq_server(xen_domid
, &state
->ioservid
);
1241 state
->exit
.notify
= xen_exit_notifier
;
1242 qemu_add_exit_notifier(&state
->exit
);
1244 state
->suspend
.notify
= xen_suspend_notifier
;
1245 qemu_register_suspend_notifier(&state
->suspend
);
1247 state
->wakeup
.notify
= xen_wakeup_notifier
;
1248 qemu_register_wakeup_notifier(&state
->wakeup
);
1250 rc
= xen_get_ioreq_server_info(xen_domid
, state
->ioservid
,
1251 &ioreq_pfn
, &bufioreq_pfn
,
1254 error_report("failed to get ioreq server info: error %d handle=%p",
1259 DPRINTF("shared page at pfn %lx\n", ioreq_pfn
);
1260 DPRINTF("buffered io page at pfn %lx\n", bufioreq_pfn
);
1261 DPRINTF("buffered io evtchn is %x\n", bufioreq_evtchn
);
1263 state
->shared_page
= xenforeignmemory_map(xen_fmem
, xen_domid
,
1264 PROT_READ
|PROT_WRITE
,
1265 1, &ioreq_pfn
, NULL
);
1266 if (state
->shared_page
== NULL
) {
1267 error_report("map shared IO page returned error %d handle=%p",
1272 rc
= xen_get_vmport_regs_pfn(xen_xc
, xen_domid
, &ioreq_pfn
);
1274 DPRINTF("shared vmport page at pfn %lx\n", ioreq_pfn
);
1275 state
->shared_vmport_page
=
1276 xenforeignmemory_map(xen_fmem
, xen_domid
, PROT_READ
|PROT_WRITE
,
1277 1, &ioreq_pfn
, NULL
);
1278 if (state
->shared_vmport_page
== NULL
) {
1279 error_report("map shared vmport IO page returned error %d handle=%p",
1283 } else if (rc
!= -ENOSYS
) {
1284 error_report("get vmport regs pfn returned error %d, rc=%d",
1289 state
->buffered_io_page
= xenforeignmemory_map(xen_fmem
, xen_domid
,
1290 PROT_READ
|PROT_WRITE
,
1291 1, &bufioreq_pfn
, NULL
);
1292 if (state
->buffered_io_page
== NULL
) {
1293 error_report("map buffered IO page returned error %d", errno
);
1297 /* Note: cpus is empty at this point in init */
1298 state
->cpu_by_vcpu_id
= g_malloc0(max_cpus
* sizeof(CPUState
*));
1300 rc
= xen_set_ioreq_server_state(xen_domid
, state
->ioservid
, true);
1302 error_report("failed to enable ioreq server info: error %d handle=%p",
1307 state
->ioreq_local_port
= g_malloc0(max_cpus
* sizeof (evtchn_port_t
));
1309 /* FIXME: how about if we overflow the page here? */
1310 for (i
= 0; i
< max_cpus
; i
++) {
1311 rc
= xenevtchn_bind_interdomain(state
->xce_handle
, xen_domid
,
1312 xen_vcpu_eport(state
->shared_page
, i
));
1314 error_report("shared evtchn %d bind error %d", i
, errno
);
1317 state
->ioreq_local_port
[i
] = rc
;
1320 rc
= xenevtchn_bind_interdomain(state
->xce_handle
, xen_domid
,
1323 error_report("buffered evtchn bind error %d", errno
);
1326 state
->bufioreq_local_port
= rc
;
1328 /* Init RAM management */
1329 xen_map_cache_init(xen_phys_offset_to_gaddr
, state
);
1330 xen_ram_init(pcms
, ram_size
, ram_memory
);
1332 qemu_add_vm_change_state_handler(xen_hvm_change_state_handler
, state
);
1334 state
->memory_listener
= xen_memory_listener
;
1335 QLIST_INIT(&state
->physmap
);
1336 memory_listener_register(&state
->memory_listener
, &address_space_memory
);
1337 state
->log_for_dirtybit
= NULL
;
1339 state
->io_listener
= xen_io_listener
;
1340 memory_listener_register(&state
->io_listener
, &address_space_io
);
1342 state
->device_listener
= xen_device_listener
;
1343 device_listener_register(&state
->device_listener
);
1345 /* Initialize backend core & drivers */
1346 if (xen_be_init() != 0) {
1347 error_report("xen backend core setup failed");
1350 xen_be_register_common();
1351 xen_read_physmap(state
);
1353 /* Disable ACPI build because Xen handles it */
1354 pcms
->acpi_build_enabled
= false;
1359 error_report("xen hardware virtual machine initialisation failed");
1363 void destroy_hvm_domain(bool reboot
)
1365 xc_interface
*xc_handle
;
1368 xc_handle
= xc_interface_open(0, 0, 0);
1369 if (xc_handle
== NULL
) {
1370 fprintf(stderr
, "Cannot acquire xenctrl handle\n");
1372 sts
= xc_domain_shutdown(xc_handle
, xen_domid
,
1373 reboot
? SHUTDOWN_reboot
: SHUTDOWN_poweroff
);
1375 fprintf(stderr
, "xc_domain_shutdown failed to issue %s, "
1376 "sts %d, %s\n", reboot
? "reboot" : "poweroff",
1377 sts
, strerror(errno
));
1379 fprintf(stderr
, "Issued domain %d %s\n", xen_domid
,
1380 reboot
? "reboot" : "poweroff");
1382 xc_interface_close(xc_handle
);
1386 void xen_register_framebuffer(MemoryRegion
*mr
)
1391 void xen_shutdown_fatal_error(const char *fmt
, ...)
1396 vfprintf(stderr
, fmt
, ap
);
1398 fprintf(stderr
, "Will destroy the domain.\n");
1399 /* destroy the domain */
1400 qemu_system_shutdown_request(SHUTDOWN_CAUSE_HOST_ERROR
);
1403 void xen_hvm_modified_memory(ram_addr_t start
, ram_addr_t length
)
1405 if (unlikely(xen_in_migration
)) {
1407 ram_addr_t start_pfn
, nb_pages
;
1410 length
= TARGET_PAGE_SIZE
;
1412 start_pfn
= start
>> TARGET_PAGE_BITS
;
1413 nb_pages
= ((start
+ length
+ TARGET_PAGE_SIZE
- 1) >> TARGET_PAGE_BITS
)
1415 rc
= xen_modified_memory(xen_domid
, start_pfn
, nb_pages
);
1418 "%s failed for "RAM_ADDR_FMT
" ("RAM_ADDR_FMT
"): %i, %s\n",
1419 __func__
, start
, nb_pages
, rc
, strerror(-rc
));
1424 void qmp_xen_set_global_dirty_log(bool enable
, Error
**errp
)
1427 memory_global_dirty_log_start();
1429 memory_global_dirty_log_stop();