2 * Copyright (c) 2007, Neocleus Corporation.
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * You should have received a copy of the GNU General Public License along with
14 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
15 * Place - Suite 330, Boston, MA 02111-1307 USA.
18 * Assign a PCI device from the host to a guest VM.
20 * Adapted for KVM by Qumranet.
22 * Copyright (c) 2007, Neocleus, Alex Novik (alex@neocleus.com)
23 * Copyright (c) 2007, Neocleus, Guy Zana (guy@neocleus.com)
24 * Copyright (C) 2008, Qumranet, Amit Shah (amit.shah@qumranet.com)
25 * Copyright (C) 2008, Red Hat, Amit Shah (amit.shah@redhat.com)
26 * Copyright (C) 2008, IBM, Muli Ben-Yehuda (muli@il.ibm.com)
31 #include <sys/types.h>
36 #include "qemu-error.h"
38 #include "device-assignment.h"
44 #define MSIX_PAGE_SIZE 0x1000
46 /* From linux/ioport.h */
47 #define IORESOURCE_IO 0x00000100 /* Resource type */
48 #define IORESOURCE_MEM 0x00000200
49 #define IORESOURCE_IRQ 0x00000400
50 #define IORESOURCE_DMA 0x00000800
51 #define IORESOURCE_PREFETCH 0x00002000 /* No side effects */
53 /* #define DEVICE_ASSIGNMENT_DEBUG 1 */
55 #ifdef DEVICE_ASSIGNMENT_DEBUG
56 #define DEBUG(fmt, ...) \
58 fprintf(stderr, "%s: " fmt, __func__ , __VA_ARGS__); \
61 #define DEBUG(fmt, ...) do { } while(0)
64 static void assigned_dev_load_option_rom(AssignedDevice
*dev
);
66 static void assigned_dev_unregister_msix_mmio(AssignedDevice
*dev
);
68 static uint32_t assigned_dev_ioport_rw(AssignedDevRegion
*dev_region
,
69 uint32_t addr
, int len
, uint32_t *val
)
72 uint32_t offset
= addr
;
73 int fd
= dev_region
->region
->resource_fd
;
77 DEBUG("pwrite val=%x, len=%d, e_phys=%x, offset=%x\n",
78 *val
, len
, addr
, offset
);
79 if (pwrite(fd
, val
, len
, offset
) != len
) {
80 fprintf(stderr
, "%s - pwrite failed %s\n",
81 __func__
, strerror(errno
));
84 if (pread(fd
, &ret
, len
, offset
) != len
) {
85 fprintf(stderr
, "%s - pread failed %s\n",
86 __func__
, strerror(errno
));
87 ret
= (1UL << (len
* 8)) - 1;
89 DEBUG("pread ret=%x, len=%d, e_phys=%x, offset=%x\n",
90 ret
, len
, addr
, offset
);
93 uint32_t port
= offset
+ dev_region
->u
.r_baseport
;
96 DEBUG("out val=%x, len=%d, e_phys=%x, host=%x\n",
97 *val
, len
, addr
, port
);
121 DEBUG("in val=%x, len=%d, e_phys=%x, host=%x\n",
122 ret
, len
, addr
, port
);
128 static void assigned_dev_ioport_writeb(void *opaque
, uint32_t addr
,
131 assigned_dev_ioport_rw(opaque
, addr
, 1, &value
);
135 static void assigned_dev_ioport_writew(void *opaque
, uint32_t addr
,
138 assigned_dev_ioport_rw(opaque
, addr
, 2, &value
);
142 static void assigned_dev_ioport_writel(void *opaque
, uint32_t addr
,
145 assigned_dev_ioport_rw(opaque
, addr
, 4, &value
);
149 static uint32_t assigned_dev_ioport_readb(void *opaque
, uint32_t addr
)
151 return assigned_dev_ioport_rw(opaque
, addr
, 1, NULL
);
154 static uint32_t assigned_dev_ioport_readw(void *opaque
, uint32_t addr
)
156 return assigned_dev_ioport_rw(opaque
, addr
, 2, NULL
);
159 static uint32_t assigned_dev_ioport_readl(void *opaque
, uint32_t addr
)
161 return assigned_dev_ioport_rw(opaque
, addr
, 4, NULL
);
164 static uint32_t slow_bar_readb(void *opaque
, target_phys_addr_t addr
)
166 AssignedDevRegion
*d
= opaque
;
167 uint8_t *in
= d
->u
.r_virtbase
+ addr
;
171 DEBUG("slow_bar_readl addr=0x" TARGET_FMT_plx
" val=0x%08x\n", addr
, r
);
176 static uint32_t slow_bar_readw(void *opaque
, target_phys_addr_t addr
)
178 AssignedDevRegion
*d
= opaque
;
179 uint16_t *in
= d
->u
.r_virtbase
+ addr
;
183 DEBUG("slow_bar_readl addr=0x" TARGET_FMT_plx
" val=0x%08x\n", addr
, r
);
188 static uint32_t slow_bar_readl(void *opaque
, target_phys_addr_t addr
)
190 AssignedDevRegion
*d
= opaque
;
191 uint32_t *in
= d
->u
.r_virtbase
+ addr
;
195 DEBUG("slow_bar_readl addr=0x" TARGET_FMT_plx
" val=0x%08x\n", addr
, r
);
200 static void slow_bar_writeb(void *opaque
, target_phys_addr_t addr
, uint32_t val
)
202 AssignedDevRegion
*d
= opaque
;
203 uint8_t *out
= d
->u
.r_virtbase
+ addr
;
205 DEBUG("slow_bar_writeb addr=0x" TARGET_FMT_plx
" val=0x%02x\n", addr
, val
);
209 static void slow_bar_writew(void *opaque
, target_phys_addr_t addr
, uint32_t val
)
211 AssignedDevRegion
*d
= opaque
;
212 uint16_t *out
= d
->u
.r_virtbase
+ addr
;
214 DEBUG("slow_bar_writew addr=0x" TARGET_FMT_plx
" val=0x%04x\n", addr
, val
);
218 static void slow_bar_writel(void *opaque
, target_phys_addr_t addr
, uint32_t val
)
220 AssignedDevRegion
*d
= opaque
;
221 uint32_t *out
= d
->u
.r_virtbase
+ addr
;
223 DEBUG("slow_bar_writel addr=0x" TARGET_FMT_plx
" val=0x%08x\n", addr
, val
);
227 static const MemoryRegionOps slow_bar_ops
= {
229 .read
= { slow_bar_readb
, slow_bar_readw
, slow_bar_readl
, },
230 .write
= { slow_bar_writeb
, slow_bar_writew
, slow_bar_writel
, },
232 .endianness
= DEVICE_NATIVE_ENDIAN
,
235 static void assigned_dev_iomem_setup(PCIDevice
*pci_dev
, int region_num
,
238 AssignedDevice
*r_dev
= DO_UPCAST(AssignedDevice
, dev
, pci_dev
);
239 AssignedDevRegion
*region
= &r_dev
->v_addrs
[region_num
];
240 PCIRegion
*real_region
= &r_dev
->real_device
.regions
[region_num
];
243 memory_region_init(®ion
->container
, "assigned-dev-container",
245 memory_region_add_subregion(®ion
->container
, 0, ®ion
->real_iomem
);
247 /* deal with MSI-X MMIO page */
248 if (real_region
->base_addr
<= r_dev
->msix_table_addr
&&
249 real_region
->base_addr
+ real_region
->size
>=
250 r_dev
->msix_table_addr
) {
251 int offset
= r_dev
->msix_table_addr
- real_region
->base_addr
;
253 memory_region_add_subregion_overlap(®ion
->container
,
261 static const MemoryRegionPortio assigned_dev_old_portio
[] = {
262 { 0x10000, 1, .read
= assigned_dev_ioport_readb
, },
263 { 0x10000, 2, .read
= assigned_dev_ioport_readw
, },
264 { 0x10000, 4, .read
= assigned_dev_ioport_readl
, },
265 { 0x10000, 1, .write
= assigned_dev_ioport_writeb
, },
266 { 0x10000, 2, .write
= assigned_dev_ioport_writew
, },
267 { 0x10000, 4, .write
= assigned_dev_ioport_writel
, },
271 static const MemoryRegionOps assigned_dev_ioport_ops
= {
272 .old_portio
= assigned_dev_old_portio
,
273 .endianness
= DEVICE_NATIVE_ENDIAN
,
276 static void assigned_dev_ioport_setup(PCIDevice
*pci_dev
, int region_num
,
279 AssignedDevice
*r_dev
= DO_UPCAST(AssignedDevice
, dev
, pci_dev
);
280 AssignedDevRegion
*region
= &r_dev
->v_addrs
[region_num
];
283 region
->e_size
= size
;
285 if (region
->region
->resource_fd
< 0) {
286 r
= kvm_add_ioport_region(region
->u
.r_baseport
, region
->r_size
,
287 pci_dev
->qdev
.hotplugged
);
289 fprintf(stderr
, "%s: failed to enable ioport access (%m)\n",
293 memory_region_init(®ion
->container
, "assigned-dev-container", size
);
294 memory_region_init_io(®ion
->real_iomem
, &assigned_dev_ioport_ops
,
295 r_dev
->v_addrs
+ region_num
,
296 "assigned-dev-iomem", size
);
297 memory_region_add_subregion(®ion
->container
, 0, ®ion
->real_iomem
);
300 static uint32_t assigned_dev_pci_read(PCIDevice
*d
, int pos
, int len
)
302 AssignedDevice
*pci_dev
= DO_UPCAST(AssignedDevice
, dev
, d
);
305 int fd
= pci_dev
->real_device
.config_fd
;
308 ret
= pread(fd
, &val
, len
, pos
);
310 if ((ret
< 0) && (errno
== EINTR
|| errno
== EAGAIN
))
313 fprintf(stderr
, "%s: pread failed, ret = %zd errno = %d\n",
314 __func__
, ret
, errno
);
322 static uint8_t assigned_dev_pci_read_byte(PCIDevice
*d
, int pos
)
324 return (uint8_t)assigned_dev_pci_read(d
, pos
, 1);
327 static void assigned_dev_pci_write(PCIDevice
*d
, int pos
, uint32_t val
, int len
)
329 AssignedDevice
*pci_dev
= DO_UPCAST(AssignedDevice
, dev
, d
);
331 int fd
= pci_dev
->real_device
.config_fd
;
334 ret
= pwrite(fd
, &val
, len
, pos
);
336 if ((ret
< 0) && (errno
== EINTR
|| errno
== EAGAIN
))
339 fprintf(stderr
, "%s: pwrite failed, ret = %zd errno = %d\n",
340 __func__
, ret
, errno
);
348 static void assigned_dev_emulate_config_read(AssignedDevice
*dev
,
349 uint32_t offset
, uint32_t len
)
351 memset(dev
->emulate_config_read
+ offset
, 0xff, len
);
354 static void assigned_dev_direct_config_read(AssignedDevice
*dev
,
355 uint32_t offset
, uint32_t len
)
357 memset(dev
->emulate_config_read
+ offset
, 0, len
);
360 static void assigned_dev_direct_config_write(AssignedDevice
*dev
,
361 uint32_t offset
, uint32_t len
)
363 memset(dev
->emulate_config_write
+ offset
, 0, len
);
366 static uint8_t pci_find_cap_offset(PCIDevice
*d
, uint8_t cap
, uint8_t start
)
370 int pos
= start
? start
: PCI_CAPABILITY_LIST
;
373 status
= assigned_dev_pci_read_byte(d
, PCI_STATUS
);
374 if ((status
& PCI_STATUS_CAP_LIST
) == 0)
378 pos
= assigned_dev_pci_read_byte(d
, pos
);
383 id
= assigned_dev_pci_read_byte(d
, pos
+ PCI_CAP_LIST_ID
);
390 pos
+= PCI_CAP_LIST_NEXT
;
395 static int assigned_dev_register_regions(PCIRegion
*io_regions
,
396 unsigned long regions_num
,
397 AssignedDevice
*pci_dev
)
400 PCIRegion
*cur_region
= io_regions
;
402 for (i
= 0; i
< regions_num
; i
++, cur_region
++) {
403 if (!cur_region
->valid
)
405 pci_dev
->v_addrs
[i
].num
= i
;
407 /* handle memory io regions */
408 if (cur_region
->type
& IORESOURCE_MEM
) {
409 int t
= cur_region
->type
& IORESOURCE_PREFETCH
410 ? PCI_BASE_ADDRESS_MEM_PREFETCH
411 : PCI_BASE_ADDRESS_SPACE_MEMORY
;
413 /* map physical memory */
414 pci_dev
->v_addrs
[i
].u
.r_virtbase
= mmap(NULL
, cur_region
->size
,
415 PROT_WRITE
| PROT_READ
,
417 cur_region
->resource_fd
,
420 if (pci_dev
->v_addrs
[i
].u
.r_virtbase
== MAP_FAILED
) {
421 pci_dev
->v_addrs
[i
].u
.r_virtbase
= NULL
;
422 fprintf(stderr
, "%s: Error: Couldn't mmap 0x%x!"
424 (uint32_t) (cur_region
->base_addr
));
428 pci_dev
->v_addrs
[i
].r_size
= cur_region
->size
;
429 pci_dev
->v_addrs
[i
].e_size
= 0;
432 pci_dev
->v_addrs
[i
].u
.r_virtbase
+=
433 (cur_region
->base_addr
& 0xFFF);
435 if (cur_region
->size
& 0xFFF) {
436 fprintf(stderr
, "PCI region %d at address 0x%llx "
437 "has size 0x%x, which is not a multiple of 4K. "
438 "You might experience some performance hit "
440 i
, (unsigned long long)cur_region
->base_addr
,
442 memory_region_init_io(&pci_dev
->v_addrs
[i
].real_iomem
,
443 &slow_bar_ops
, &pci_dev
->v_addrs
[i
],
444 "assigned-dev-slow-bar",
447 void *virtbase
= pci_dev
->v_addrs
[i
].u
.r_virtbase
;
449 snprintf(name
, sizeof(name
), "%s.bar%d",
450 pci_dev
->dev
.qdev
.info
->name
, i
);
451 memory_region_init_ram_ptr(&pci_dev
->v_addrs
[i
].real_iomem
,
453 name
, cur_region
->size
,
457 assigned_dev_iomem_setup(&pci_dev
->dev
, i
, cur_region
->size
);
458 pci_register_bar((PCIDevice
*) pci_dev
, i
, t
,
459 &pci_dev
->v_addrs
[i
].container
);
462 /* handle port io regions */
466 /* Test kernel support for ioport resource read/write. Old
467 * kernels return EIO. New kernels only allow 1/2/4 byte reads
468 * so should return EINVAL for a 3 byte read */
469 ret
= pread(pci_dev
->v_addrs
[i
].region
->resource_fd
, &val
, 3, 0);
471 fprintf(stderr
, "I/O port resource supports 3 byte read?!\n");
473 } else if (errno
!= EINVAL
) {
474 fprintf(stderr
, "Using raw in/out ioport access (sysfs - %s)\n",
476 close(pci_dev
->v_addrs
[i
].region
->resource_fd
);
477 pci_dev
->v_addrs
[i
].region
->resource_fd
= -1;
480 pci_dev
->v_addrs
[i
].u
.r_baseport
= cur_region
->base_addr
;
481 pci_dev
->v_addrs
[i
].r_size
= cur_region
->size
;
482 pci_dev
->v_addrs
[i
].e_size
= 0;
484 assigned_dev_ioport_setup(&pci_dev
->dev
, i
, cur_region
->size
);
485 pci_register_bar((PCIDevice
*) pci_dev
, i
,
486 PCI_BASE_ADDRESS_SPACE_IO
,
487 &pci_dev
->v_addrs
[i
].container
);
495 static int get_real_id(const char *devpath
, const char *idname
, uint16_t *val
)
501 snprintf(name
, sizeof(name
), "%s%s", devpath
, idname
);
502 f
= fopen(name
, "r");
504 fprintf(stderr
, "%s: %s: %m\n", __func__
, name
);
507 if (fscanf(f
, "%li\n", &id
) == 1) {
517 static int get_real_vendor_id(const char *devpath
, uint16_t *val
)
519 return get_real_id(devpath
, "vendor", val
);
522 static int get_real_device_id(const char *devpath
, uint16_t *val
)
524 return get_real_id(devpath
, "device", val
);
527 static int get_real_device(AssignedDevice
*pci_dev
, uint16_t r_seg
,
528 uint8_t r_bus
, uint8_t r_dev
, uint8_t r_func
)
530 char dir
[128], name
[128];
533 unsigned long long start
, end
, size
, flags
;
537 PCIDevRegions
*dev
= &pci_dev
->real_device
;
539 dev
->region_number
= 0;
541 snprintf(dir
, sizeof(dir
), "/sys/bus/pci/devices/%04x:%02x:%02x.%x/",
542 r_seg
, r_bus
, r_dev
, r_func
);
544 snprintf(name
, sizeof(name
), "%sconfig", dir
);
546 if (pci_dev
->configfd_name
&& *pci_dev
->configfd_name
) {
547 if (qemu_isdigit(pci_dev
->configfd_name
[0])) {
548 dev
->config_fd
= strtol(pci_dev
->configfd_name
, NULL
, 0);
550 dev
->config_fd
= monitor_get_fd(cur_mon
, pci_dev
->configfd_name
);
551 if (dev
->config_fd
< 0) {
552 fprintf(stderr
, "%s: (%s) unkown\n", __func__
,
553 pci_dev
->configfd_name
);
558 dev
->config_fd
= open(name
, O_RDWR
);
560 if (dev
->config_fd
== -1) {
561 fprintf(stderr
, "%s: %s: %m\n", __func__
, name
);
566 r
= read(dev
->config_fd
, pci_dev
->dev
.config
,
567 pci_config_size(&pci_dev
->dev
));
569 if (errno
== EINTR
|| errno
== EAGAIN
)
571 fprintf(stderr
, "%s: read failed, errno = %d\n", __func__
, errno
);
574 /* Clear host resource mapping info. If we choose not to register a
575 * BAR, such as might be the case with the option ROM, we can get
576 * confusing, unwritable, residual addresses from the host here. */
577 memset(&pci_dev
->dev
.config
[PCI_BASE_ADDRESS_0
], 0, 24);
578 memset(&pci_dev
->dev
.config
[PCI_ROM_ADDRESS
], 0, 4);
580 snprintf(name
, sizeof(name
), "%sresource", dir
);
582 f
= fopen(name
, "r");
584 fprintf(stderr
, "%s: %s: %m\n", __func__
, name
);
588 for (r
= 0; r
< PCI_ROM_SLOT
; r
++) {
589 if (fscanf(f
, "%lli %lli %lli\n", &start
, &end
, &flags
) != 3)
592 rp
= dev
->regions
+ r
;
594 rp
->resource_fd
= -1;
595 size
= end
- start
+ 1;
596 flags
&= IORESOURCE_IO
| IORESOURCE_MEM
| IORESOURCE_PREFETCH
;
597 if (size
== 0 || (flags
& ~IORESOURCE_PREFETCH
) == 0)
599 if (flags
& IORESOURCE_MEM
) {
600 flags
&= ~IORESOURCE_IO
;
602 flags
&= ~IORESOURCE_PREFETCH
;
604 snprintf(name
, sizeof(name
), "%sresource%d", dir
, r
);
605 fd
= open(name
, O_RDWR
);
608 rp
->resource_fd
= fd
;
612 rp
->base_addr
= start
;
614 pci_dev
->v_addrs
[r
].region
= rp
;
615 DEBUG("region %d size %d start 0x%llx type %d resource_fd %d\n",
616 r
, rp
->size
, start
, rp
->type
, rp
->resource_fd
);
621 /* read and fill vendor ID */
622 v
= get_real_vendor_id(dir
, &id
);
626 pci_dev
->dev
.config
[0] = id
& 0xff;
627 pci_dev
->dev
.config
[1] = (id
& 0xff00) >> 8;
629 /* read and fill device ID */
630 v
= get_real_device_id(dir
, &id
);
634 pci_dev
->dev
.config
[2] = id
& 0xff;
635 pci_dev
->dev
.config
[3] = (id
& 0xff00) >> 8;
637 /* dealing with virtual function device */
638 snprintf(name
, sizeof(name
), "%sphysfn/", dir
);
639 if (!stat(name
, &statbuf
)) {
640 /* always provide the written value on readout */
641 assigned_dev_emulate_config_read(pci_dev
, PCI_COMMAND
, 2);
644 dev
->region_number
= r
;
648 static QLIST_HEAD(, AssignedDevice
) devs
= QLIST_HEAD_INITIALIZER(devs
);
650 static void free_dev_irq_entries(AssignedDevice
*dev
)
654 for (i
= 0; i
< dev
->irq_entries_nr
; i
++)
655 kvm_del_routing_entry(&dev
->entry
[i
]);
658 dev
->irq_entries_nr
= 0;
661 static void free_assigned_device(AssignedDevice
*dev
)
665 if (dev
->cap
.available
& ASSIGNED_DEVICE_CAP_MSIX
) {
666 assigned_dev_unregister_msix_mmio(dev
);
668 for (i
= 0; i
< dev
->real_device
.region_number
; i
++) {
669 PCIRegion
*pci_region
= &dev
->real_device
.regions
[i
];
670 AssignedDevRegion
*region
= &dev
->v_addrs
[i
];
672 if (!pci_region
->valid
) {
675 if (pci_region
->type
& IORESOURCE_IO
) {
676 if (pci_region
->resource_fd
< 0) {
677 kvm_remove_ioport_region(region
->u
.r_baseport
, region
->r_size
,
678 dev
->dev
.qdev
.hotplugged
);
680 } else if (pci_region
->type
& IORESOURCE_MEM
) {
681 if (region
->u
.r_virtbase
) {
682 memory_region_del_subregion(®ion
->container
,
683 ®ion
->real_iomem
);
684 memory_region_destroy(®ion
->real_iomem
);
685 memory_region_destroy(®ion
->container
);
686 if (munmap(region
->u
.r_virtbase
,
687 (pci_region
->size
+ 0xFFF) & 0xFFFFF000)) {
689 "Failed to unmap assigned device region: %s\n",
694 if (pci_region
->resource_fd
>= 0) {
695 close(pci_region
->resource_fd
);
699 if (dev
->real_device
.config_fd
>= 0) {
700 close(dev
->real_device
.config_fd
);
703 free_dev_irq_entries(dev
);
706 static uint32_t calc_assigned_dev_id(AssignedDevice
*dev
)
708 return (uint32_t)dev
->h_segnr
<< 16 | (uint32_t)dev
->h_busnr
<< 8 |
709 (uint32_t)dev
->h_devfn
;
712 static void assign_failed_examine(AssignedDevice
*dev
)
714 char name
[PATH_MAX
], dir
[PATH_MAX
], driver
[PATH_MAX
] = {}, *ns
;
715 uint16_t vendor_id
, device_id
;
718 sprintf(dir
, "/sys/bus/pci/devices/%04x:%02x:%02x.%01x/",
719 dev
->host
.seg
, dev
->host
.bus
, dev
->host
.dev
, dev
->host
.func
);
721 sprintf(name
, "%sdriver", dir
);
723 r
= readlink(name
, driver
, sizeof(driver
));
724 if ((r
<= 0) || r
>= sizeof(driver
) || !(ns
= strrchr(driver
, '/'))) {
730 if (get_real_vendor_id(dir
, &vendor_id
) ||
731 get_real_device_id(dir
, &device_id
)) {
735 fprintf(stderr
, "*** The driver '%s' is occupying your device "
736 "%04x:%02x:%02x.%x.\n",
737 ns
, dev
->host
.seg
, dev
->host
.bus
, dev
->host
.dev
, dev
->host
.func
);
738 fprintf(stderr
, "***\n");
739 fprintf(stderr
, "*** You can try the following commands to free it:\n");
740 fprintf(stderr
, "***\n");
741 fprintf(stderr
, "*** $ echo \"%04x %04x\" > /sys/bus/pci/drivers/pci-stub/"
742 "new_id\n", vendor_id
, device_id
);
743 fprintf(stderr
, "*** $ echo \"%04x:%02x:%02x.%x\" > /sys/bus/pci/drivers/"
745 dev
->host
.seg
, dev
->host
.bus
, dev
->host
.dev
, dev
->host
.func
, ns
);
746 fprintf(stderr
, "*** $ echo \"%04x:%02x:%02x.%x\" > /sys/bus/pci/drivers/"
748 dev
->host
.seg
, dev
->host
.bus
, dev
->host
.dev
, dev
->host
.func
);
749 fprintf(stderr
, "*** $ echo \"%04x %04x\" > /sys/bus/pci/drivers/pci-stub"
750 "/remove_id\n", vendor_id
, device_id
);
751 fprintf(stderr
, "***\n");
756 fprintf(stderr
, "Couldn't find out why.\n");
759 static int assign_device(AssignedDevice
*dev
)
761 struct kvm_assigned_pci_dev assigned_dev_data
;
764 /* Only pass non-zero PCI segment to capable module */
765 if (!kvm_check_extension(kvm_state
, KVM_CAP_PCI_SEGMENT
) &&
767 fprintf(stderr
, "Can't assign device inside non-zero PCI segment "
768 "as this KVM module doesn't support it.\n");
772 memset(&assigned_dev_data
, 0, sizeof(assigned_dev_data
));
773 assigned_dev_data
.assigned_dev_id
= calc_assigned_dev_id(dev
);
774 assigned_dev_data
.segnr
= dev
->h_segnr
;
775 assigned_dev_data
.busnr
= dev
->h_busnr
;
776 assigned_dev_data
.devfn
= dev
->h_devfn
;
778 /* We always enable the IOMMU unless disabled on the command line */
779 if (dev
->features
& ASSIGNED_DEVICE_USE_IOMMU_MASK
) {
780 if (!kvm_check_extension(kvm_state
, KVM_CAP_IOMMU
)) {
781 fprintf(stderr
, "No IOMMU found. Unable to assign device \"%s\"\n",
785 assigned_dev_data
.flags
|= KVM_DEV_ASSIGN_ENABLE_IOMMU
;
787 if (!(dev
->features
& ASSIGNED_DEVICE_USE_IOMMU_MASK
)) {
789 "WARNING: Assigning a device without IOMMU protection can "
790 "cause host memory corruption if the device issues DMA write "
794 r
= kvm_assign_pci_device(kvm_state
, &assigned_dev_data
);
796 fprintf(stderr
, "Failed to assign device \"%s\" : %s\n",
797 dev
->dev
.qdev
.id
, strerror(-r
));
801 assign_failed_examine(dev
);
810 static int assign_irq(AssignedDevice
*dev
)
812 struct kvm_assigned_irq assigned_irq_data
;
815 /* Interrupt PIN 0 means don't use INTx */
816 if (assigned_dev_pci_read_byte(&dev
->dev
, PCI_INTERRUPT_PIN
) == 0)
819 irq
= pci_map_irq(&dev
->dev
, dev
->intpin
);
820 irq
= piix_get_irq(irq
);
822 if (dev
->girq
== irq
)
825 memset(&assigned_irq_data
, 0, sizeof(assigned_irq_data
));
826 assigned_irq_data
.assigned_dev_id
= calc_assigned_dev_id(dev
);
827 assigned_irq_data
.guest_irq
= irq
;
828 assigned_irq_data
.host_irq
= dev
->real_device
.irq
;
829 if (dev
->irq_requested_type
) {
830 assigned_irq_data
.flags
= dev
->irq_requested_type
;
831 r
= kvm_deassign_irq(kvm_state
, &assigned_irq_data
);
833 perror("assign_irq: deassign");
835 dev
->irq_requested_type
= 0;
838 assigned_irq_data
.flags
= KVM_DEV_IRQ_GUEST_INTX
;
839 if (dev
->features
& ASSIGNED_DEVICE_PREFER_MSI_MASK
&&
840 dev
->cap
.available
& ASSIGNED_DEVICE_CAP_MSI
)
841 assigned_irq_data
.flags
|= KVM_DEV_IRQ_HOST_MSI
;
843 assigned_irq_data
.flags
|= KVM_DEV_IRQ_HOST_INTX
;
845 r
= kvm_assign_irq(kvm_state
, &assigned_irq_data
);
847 fprintf(stderr
, "Failed to assign irq for \"%s\": %s\n",
848 dev
->dev
.qdev
.id
, strerror(-r
));
849 fprintf(stderr
, "Perhaps you are assigning a device "
850 "that shares an IRQ with another device?\n");
855 dev
->irq_requested_type
= assigned_irq_data
.flags
;
859 static void deassign_device(AssignedDevice
*dev
)
861 struct kvm_assigned_pci_dev assigned_dev_data
;
864 memset(&assigned_dev_data
, 0, sizeof(assigned_dev_data
));
865 assigned_dev_data
.assigned_dev_id
= calc_assigned_dev_id(dev
);
867 r
= kvm_deassign_pci_device(kvm_state
, &assigned_dev_data
);
869 fprintf(stderr
, "Failed to deassign device \"%s\" : %s\n",
870 dev
->dev
.qdev
.id
, strerror(-r
));
874 AssignedDevInfo
*get_assigned_device(int pcibus
, int slot
)
876 AssignedDevice
*assigned_dev
= NULL
;
877 AssignedDevInfo
*adev
= NULL
;
879 QLIST_FOREACH(adev
, &adev_head
, next
) {
880 assigned_dev
= adev
->assigned_dev
;
881 if (pci_bus_num(assigned_dev
->dev
.bus
) == pcibus
&&
882 PCI_SLOT(assigned_dev
->dev
.devfn
) == slot
)
890 /* The pci config space got updated. Check if irq numbers have changed
893 void assigned_dev_update_irqs(void)
895 AssignedDevice
*dev
, *next
;
898 dev
= QLIST_FIRST(&devs
);
900 next
= QLIST_NEXT(dev
, next
);
901 if (dev
->irq_requested_type
& KVM_DEV_IRQ_HOST_INTX
) {
904 qdev_unplug(&dev
->dev
.qdev
);
911 static void assigned_dev_update_msi(PCIDevice
*pci_dev
)
913 struct kvm_assigned_irq assigned_irq_data
;
914 AssignedDevice
*assigned_dev
= DO_UPCAST(AssignedDevice
, dev
, pci_dev
);
915 uint8_t ctrl_byte
= pci_get_byte(pci_dev
->config
+ pci_dev
->msi_cap
+
919 memset(&assigned_irq_data
, 0, sizeof assigned_irq_data
);
920 assigned_irq_data
.assigned_dev_id
= calc_assigned_dev_id(assigned_dev
);
922 /* Some guests gratuitously disable MSI even if they're not using it,
923 * try to catch this by only deassigning irqs if the guest is using
924 * MSI or intends to start. */
925 if ((assigned_dev
->irq_requested_type
& KVM_DEV_IRQ_GUEST_MSI
) ||
926 (ctrl_byte
& PCI_MSI_FLAGS_ENABLE
)) {
928 assigned_irq_data
.flags
= assigned_dev
->irq_requested_type
;
929 free_dev_irq_entries(assigned_dev
);
930 r
= kvm_deassign_irq(kvm_state
, &assigned_irq_data
);
931 /* -ENXIO means no assigned irq */
932 if (r
&& r
!= -ENXIO
)
933 perror("assigned_dev_update_msi: deassign irq");
935 assigned_dev
->irq_requested_type
= 0;
938 if (ctrl_byte
& PCI_MSI_FLAGS_ENABLE
) {
939 uint8_t *pos
= pci_dev
->config
+ pci_dev
->msi_cap
;
941 assigned_dev
->entry
= g_malloc0(sizeof(*(assigned_dev
->entry
)));
942 assigned_dev
->entry
->u
.msi
.address_lo
=
943 pci_get_long(pos
+ PCI_MSI_ADDRESS_LO
);
944 assigned_dev
->entry
->u
.msi
.address_hi
= 0;
945 assigned_dev
->entry
->u
.msi
.data
= pci_get_word(pos
+ PCI_MSI_DATA_32
);
946 assigned_dev
->entry
->type
= KVM_IRQ_ROUTING_MSI
;
947 r
= kvm_get_irq_route_gsi();
949 perror("assigned_dev_update_msi: kvm_get_irq_route_gsi");
952 assigned_dev
->entry
->gsi
= r
;
954 kvm_add_routing_entry(assigned_dev
->entry
);
955 if (kvm_commit_irq_routes() < 0) {
956 perror("assigned_dev_update_msi: kvm_commit_irq_routes");
957 assigned_dev
->cap
.state
&= ~ASSIGNED_DEVICE_MSI_ENABLED
;
960 assigned_dev
->irq_entries_nr
= 1;
962 assigned_irq_data
.guest_irq
= assigned_dev
->entry
->gsi
;
963 assigned_irq_data
.flags
= KVM_DEV_IRQ_HOST_MSI
| KVM_DEV_IRQ_GUEST_MSI
;
964 if (kvm_assign_irq(kvm_state
, &assigned_irq_data
) < 0) {
965 perror("assigned_dev_enable_msi: assign irq");
968 assigned_dev
->girq
= -1;
969 assigned_dev
->irq_requested_type
= assigned_irq_data
.flags
;
971 assign_irq(assigned_dev
);
975 static int assigned_dev_update_msix_mmio(PCIDevice
*pci_dev
)
977 AssignedDevice
*adev
= DO_UPCAST(AssignedDevice
, dev
, pci_dev
);
978 uint16_t entries_nr
= 0, entries_max_nr
;
979 int pos
= 0, i
, r
= 0;
980 uint32_t msg_addr
, msg_upper_addr
, msg_data
, msg_ctrl
;
981 struct kvm_assigned_msix_nr msix_nr
;
982 struct kvm_assigned_msix_entry msix_entry
;
983 void *va
= adev
->msix_table_page
;
985 pos
= pci_find_capability(pci_dev
, PCI_CAP_ID_MSIX
);
987 entries_max_nr
= *(uint16_t *)(pci_dev
->config
+ pos
+ 2);
988 entries_max_nr
&= PCI_MSIX_FLAGS_QSIZE
;
991 /* Get the usable entry number for allocating */
992 for (i
= 0; i
< entries_max_nr
; i
++) {
993 memcpy(&msg_ctrl
, va
+ i
* 16 + 12, 4);
994 memcpy(&msg_data
, va
+ i
* 16 + 8, 4);
995 /* Ignore unused entry even it's unmasked */
1001 if (entries_nr
== 0) {
1002 fprintf(stderr
, "MSI-X entry number is zero!\n");
1005 msix_nr
.assigned_dev_id
= calc_assigned_dev_id(adev
);
1006 msix_nr
.entry_nr
= entries_nr
;
1007 r
= kvm_assign_set_msix_nr(kvm_state
, &msix_nr
);
1009 fprintf(stderr
, "fail to set MSI-X entry number for MSIX! %s\n",
1014 free_dev_irq_entries(adev
);
1015 adev
->irq_entries_nr
= entries_nr
;
1016 adev
->entry
= g_malloc0(entries_nr
* sizeof(*(adev
->entry
)));
1018 msix_entry
.assigned_dev_id
= msix_nr
.assigned_dev_id
;
1020 for (i
= 0; i
< entries_max_nr
; i
++) {
1021 if (entries_nr
>= msix_nr
.entry_nr
)
1023 memcpy(&msg_ctrl
, va
+ i
* 16 + 12, 4);
1024 memcpy(&msg_data
, va
+ i
* 16 + 8, 4);
1028 memcpy(&msg_addr
, va
+ i
* 16, 4);
1029 memcpy(&msg_upper_addr
, va
+ i
* 16 + 4, 4);
1031 r
= kvm_get_irq_route_gsi();
1035 adev
->entry
[entries_nr
].gsi
= r
;
1036 adev
->entry
[entries_nr
].type
= KVM_IRQ_ROUTING_MSI
;
1037 adev
->entry
[entries_nr
].flags
= 0;
1038 adev
->entry
[entries_nr
].u
.msi
.address_lo
= msg_addr
;
1039 adev
->entry
[entries_nr
].u
.msi
.address_hi
= msg_upper_addr
;
1040 adev
->entry
[entries_nr
].u
.msi
.data
= msg_data
;
1041 DEBUG("MSI-X data 0x%x, MSI-X addr_lo 0x%x\n!", msg_data
, msg_addr
);
1042 kvm_add_routing_entry(&adev
->entry
[entries_nr
]);
1044 msix_entry
.gsi
= adev
->entry
[entries_nr
].gsi
;
1045 msix_entry
.entry
= i
;
1046 r
= kvm_assign_set_msix_entry(kvm_state
, &msix_entry
);
1048 fprintf(stderr
, "fail to set MSI-X entry! %s\n", strerror(-r
));
1051 DEBUG("MSI-X entry gsi 0x%x, entry %d\n!",
1052 msix_entry
.gsi
, msix_entry
.entry
);
1056 if (r
== 0 && kvm_commit_irq_routes() < 0) {
1057 perror("assigned_dev_update_msix_mmio: kvm_commit_irq_routes");
1064 static void assigned_dev_update_msix(PCIDevice
*pci_dev
)
1066 struct kvm_assigned_irq assigned_irq_data
;
1067 AssignedDevice
*assigned_dev
= DO_UPCAST(AssignedDevice
, dev
, pci_dev
);
1068 uint16_t ctrl_word
= pci_get_word(pci_dev
->config
+ pci_dev
->msix_cap
+
1072 memset(&assigned_irq_data
, 0, sizeof assigned_irq_data
);
1073 assigned_irq_data
.assigned_dev_id
= calc_assigned_dev_id(assigned_dev
);
1075 /* Some guests gratuitously disable MSIX even if they're not using it,
1076 * try to catch this by only deassigning irqs if the guest is using
1077 * MSIX or intends to start. */
1078 if ((assigned_dev
->irq_requested_type
& KVM_DEV_IRQ_GUEST_MSIX
) ||
1079 (ctrl_word
& PCI_MSIX_FLAGS_ENABLE
)) {
1081 assigned_irq_data
.flags
= assigned_dev
->irq_requested_type
;
1082 free_dev_irq_entries(assigned_dev
);
1083 r
= kvm_deassign_irq(kvm_state
, &assigned_irq_data
);
1084 /* -ENXIO means no assigned irq */
1085 if (r
&& r
!= -ENXIO
)
1086 perror("assigned_dev_update_msix: deassign irq");
1088 assigned_dev
->irq_requested_type
= 0;
1091 if (ctrl_word
& PCI_MSIX_FLAGS_ENABLE
) {
1092 assigned_irq_data
.flags
= KVM_DEV_IRQ_HOST_MSIX
|
1093 KVM_DEV_IRQ_GUEST_MSIX
;
1095 if (assigned_dev_update_msix_mmio(pci_dev
) < 0) {
1096 perror("assigned_dev_update_msix_mmio");
1099 if (kvm_assign_irq(kvm_state
, &assigned_irq_data
) < 0) {
1100 perror("assigned_dev_enable_msix: assign irq");
1103 assigned_dev
->girq
= -1;
1104 assigned_dev
->irq_requested_type
= assigned_irq_data
.flags
;
1106 assign_irq(assigned_dev
);
1110 static uint32_t assigned_dev_pci_read_config(PCIDevice
*pci_dev
,
1111 uint32_t address
, int len
)
1113 AssignedDevice
*assigned_dev
= DO_UPCAST(AssignedDevice
, dev
, pci_dev
);
1114 uint32_t virt_val
= pci_default_read_config(pci_dev
, address
, len
);
1115 uint32_t real_val
, emulate_mask
, full_emulation_mask
;
1118 memcpy(&emulate_mask
, assigned_dev
->emulate_config_read
+ address
, len
);
1119 emulate_mask
= le32_to_cpu(emulate_mask
);
1121 full_emulation_mask
= 0xffffffff >> (32 - len
* 8);
1123 if (emulate_mask
!= full_emulation_mask
) {
1124 real_val
= assigned_dev_pci_read(pci_dev
, address
, len
);
1125 return (virt_val
& emulate_mask
) | (real_val
& ~emulate_mask
);
1131 static void assigned_dev_pci_write_config(PCIDevice
*pci_dev
, uint32_t address
,
1132 uint32_t val
, int len
)
1134 AssignedDevice
*assigned_dev
= DO_UPCAST(AssignedDevice
, dev
, pci_dev
);
1135 uint32_t emulate_mask
, full_emulation_mask
;
1137 pci_default_write_config(pci_dev
, address
, val
, len
);
1139 if (assigned_dev
->cap
.available
& ASSIGNED_DEVICE_CAP_MSI
) {
1140 if (range_covers_byte(address
, len
,
1141 pci_dev
->msi_cap
+ PCI_MSI_FLAGS
)) {
1142 assigned_dev_update_msi(pci_dev
);
1145 if (assigned_dev
->cap
.available
& ASSIGNED_DEVICE_CAP_MSIX
) {
1146 if (range_covers_byte(address
, len
,
1147 pci_dev
->msix_cap
+ PCI_MSIX_FLAGS
+ 1)) {
1148 assigned_dev_update_msix(pci_dev
);
1153 memcpy(&emulate_mask
, assigned_dev
->emulate_config_write
+ address
, len
);
1154 emulate_mask
= le32_to_cpu(emulate_mask
);
1156 full_emulation_mask
= 0xffffffff >> (32 - len
* 8);
1158 if (emulate_mask
!= full_emulation_mask
) {
1160 val
&= ~emulate_mask
;
1161 val
|= assigned_dev_pci_read(pci_dev
, address
, len
) & emulate_mask
;
1163 assigned_dev_pci_write(pci_dev
, address
, val
, len
);
1167 static void assigned_dev_setup_cap_read(AssignedDevice
*dev
, uint32_t offset
,
1170 assigned_dev_direct_config_read(dev
, offset
, len
);
1171 assigned_dev_emulate_config_read(dev
, offset
+ PCI_CAP_LIST_NEXT
, 1);
1174 static int assigned_device_pci_cap_init(PCIDevice
*pci_dev
)
1176 AssignedDevice
*dev
= DO_UPCAST(AssignedDevice
, dev
, pci_dev
);
1177 PCIRegion
*pci_region
= dev
->real_device
.regions
;
1180 /* Clear initial capabilities pointer and status copied from hw */
1181 pci_set_byte(pci_dev
->config
+ PCI_CAPABILITY_LIST
, 0);
1182 pci_set_word(pci_dev
->config
+ PCI_STATUS
,
1183 pci_get_word(pci_dev
->config
+ PCI_STATUS
) &
1184 ~PCI_STATUS_CAP_LIST
);
1186 /* Expose MSI capability
1187 * MSI capability is the 1st capability in capability config */
1188 pos
= pci_find_cap_offset(pci_dev
, PCI_CAP_ID_MSI
, 0);
1189 if (pos
!= 0 && kvm_check_extension(kvm_state
, KVM_CAP_ASSIGN_DEV_IRQ
)) {
1190 dev
->cap
.available
|= ASSIGNED_DEVICE_CAP_MSI
;
1191 /* Only 32-bit/no-mask currently supported */
1192 if ((ret
= pci_add_capability(pci_dev
, PCI_CAP_ID_MSI
, pos
, 10)) < 0) {
1195 pci_dev
->msi_cap
= pos
;
1197 pci_set_word(pci_dev
->config
+ pos
+ PCI_MSI_FLAGS
,
1198 pci_get_word(pci_dev
->config
+ pos
+ PCI_MSI_FLAGS
) &
1199 PCI_MSI_FLAGS_QMASK
);
1200 pci_set_long(pci_dev
->config
+ pos
+ PCI_MSI_ADDRESS_LO
, 0);
1201 pci_set_word(pci_dev
->config
+ pos
+ PCI_MSI_DATA_32
, 0);
1203 /* Set writable fields */
1204 pci_set_word(pci_dev
->wmask
+ pos
+ PCI_MSI_FLAGS
,
1205 PCI_MSI_FLAGS_QSIZE
| PCI_MSI_FLAGS_ENABLE
);
1206 pci_set_long(pci_dev
->wmask
+ pos
+ PCI_MSI_ADDRESS_LO
, 0xfffffffc);
1207 pci_set_word(pci_dev
->wmask
+ pos
+ PCI_MSI_DATA_32
, 0xffff);
1209 /* Expose MSI-X capability */
1210 pos
= pci_find_cap_offset(pci_dev
, PCI_CAP_ID_MSIX
, 0);
1211 /* Would really like to test kvm_check_extension(, KVM_CAP_DEVICE_MSIX),
1212 * but the kernel doesn't expose it. Instead do a dummy call to
1213 * KVM_ASSIGN_SET_MSIX_NR to see if it exists. */
1214 if (pos
!= 0 && kvm_assign_set_msix_nr(kvm_state
, NULL
) == -EFAULT
) {
1216 uint32_t msix_table_entry
;
1218 dev
->cap
.available
|= ASSIGNED_DEVICE_CAP_MSIX
;
1219 if ((ret
= pci_add_capability(pci_dev
, PCI_CAP_ID_MSIX
, pos
, 12)) < 0) {
1222 pci_dev
->msix_cap
= pos
;
1224 pci_set_word(pci_dev
->config
+ pos
+ PCI_MSIX_FLAGS
,
1225 pci_get_word(pci_dev
->config
+ pos
+ PCI_MSIX_FLAGS
) &
1226 PCI_MSIX_FLAGS_QSIZE
);
1228 /* Only enable and function mask bits are writable */
1229 pci_set_word(pci_dev
->wmask
+ pos
+ PCI_MSIX_FLAGS
,
1230 PCI_MSIX_FLAGS_ENABLE
| PCI_MSIX_FLAGS_MASKALL
);
1232 msix_table_entry
= pci_get_long(pci_dev
->config
+ pos
+ PCI_MSIX_TABLE
);
1233 bar_nr
= msix_table_entry
& PCI_MSIX_FLAGS_BIRMASK
;
1234 msix_table_entry
&= ~PCI_MSIX_FLAGS_BIRMASK
;
1235 dev
->msix_table_addr
= pci_region
[bar_nr
].base_addr
+ msix_table_entry
;
1238 /* Minimal PM support, nothing writable, device appears to NAK changes */
1239 if ((pos
= pci_find_cap_offset(pci_dev
, PCI_CAP_ID_PM
, 0))) {
1241 if ((ret
= pci_add_capability(pci_dev
, PCI_CAP_ID_PM
, pos
,
1242 PCI_PM_SIZEOF
)) < 0) {
1246 assigned_dev_setup_cap_read(dev
, pos
, PCI_PM_SIZEOF
);
1248 pmc
= pci_get_word(pci_dev
->config
+ pos
+ PCI_CAP_FLAGS
);
1249 pmc
&= (PCI_PM_CAP_VER_MASK
| PCI_PM_CAP_DSI
);
1250 pci_set_word(pci_dev
->config
+ pos
+ PCI_CAP_FLAGS
, pmc
);
1252 /* assign_device will bring the device up to D0, so we don't need
1253 * to worry about doing that ourselves here. */
1254 pci_set_word(pci_dev
->config
+ pos
+ PCI_PM_CTRL
,
1255 PCI_PM_CTRL_NO_SOFT_RESET
);
1257 pci_set_byte(pci_dev
->config
+ pos
+ PCI_PM_PPB_EXTENSIONS
, 0);
1258 pci_set_byte(pci_dev
->config
+ pos
+ PCI_PM_DATA_REGISTER
, 0);
1261 if ((pos
= pci_find_cap_offset(pci_dev
, PCI_CAP_ID_EXP
, 0))) {
1262 uint8_t version
, size
;
1263 uint16_t type
, devctl
, lnkcap
, lnksta
;
1266 version
= pci_get_byte(pci_dev
->config
+ pos
+ PCI_EXP_FLAGS
);
1267 version
&= PCI_EXP_FLAGS_VERS
;
1270 } else if (version
== 2) {
1272 * Check for non-std size, accept reduced size to 0x34,
1273 * which is what bcm5761 implemented, violating the
1274 * PCIe v3.0 spec that regs should exist and be read as 0,
1275 * not optionally provided and shorten the struct size.
1277 size
= MIN(0x3c, PCI_CONFIG_SPACE_SIZE
- pos
);
1280 "%s: Invalid size PCIe cap-id 0x%x \n",
1281 __func__
, PCI_CAP_ID_EXP
);
1283 } else if (size
!= 0x3c) {
1285 "WARNING, %s: PCIe cap-id 0x%x has "
1286 "non-standard size 0x%x; std size should be 0x3c \n",
1287 __func__
, PCI_CAP_ID_EXP
, size
);
1291 "%s: Unsupported PCI express capability version %d\n",
1296 if ((ret
= pci_add_capability(pci_dev
, PCI_CAP_ID_EXP
,
1301 assigned_dev_setup_cap_read(dev
, pos
, size
);
1303 type
= pci_get_word(pci_dev
->config
+ pos
+ PCI_EXP_FLAGS
);
1304 type
= (type
& PCI_EXP_FLAGS_TYPE
) >> 8;
1305 if (type
!= PCI_EXP_TYPE_ENDPOINT
&&
1306 type
!= PCI_EXP_TYPE_LEG_END
&& type
!= PCI_EXP_TYPE_RC_END
) {
1308 "Device assignment only supports endpoint assignment, "
1309 "device type %d\n", type
);
1313 /* capabilities, pass existing read-only copy
1314 * PCI_EXP_FLAGS_IRQ: updated by hardware, should be direct read */
1316 /* device capabilities: hide FLR */
1317 devcap
= pci_get_long(pci_dev
->config
+ pos
+ PCI_EXP_DEVCAP
);
1318 devcap
&= ~PCI_EXP_DEVCAP_FLR
;
1319 pci_set_long(pci_dev
->config
+ pos
+ PCI_EXP_DEVCAP
, devcap
);
1321 /* device control: clear all error reporting enable bits, leaving
1322 * leaving only a few host values. Note, these are
1323 * all writable, but not passed to hw.
1325 devctl
= pci_get_word(pci_dev
->config
+ pos
+ PCI_EXP_DEVCTL
);
1326 devctl
= (devctl
& (PCI_EXP_DEVCTL_READRQ
| PCI_EXP_DEVCTL_PAYLOAD
)) |
1327 PCI_EXP_DEVCTL_RELAX_EN
| PCI_EXP_DEVCTL_NOSNOOP_EN
;
1328 pci_set_word(pci_dev
->config
+ pos
+ PCI_EXP_DEVCTL
, devctl
);
1329 devctl
= PCI_EXP_DEVCTL_BCR_FLR
| PCI_EXP_DEVCTL_AUX_PME
;
1330 pci_set_word(pci_dev
->wmask
+ pos
+ PCI_EXP_DEVCTL
, ~devctl
);
1332 /* Clear device status */
1333 pci_set_word(pci_dev
->config
+ pos
+ PCI_EXP_DEVSTA
, 0);
1335 /* Link capabilities, expose links and latencues, clear reporting */
1336 lnkcap
= pci_get_word(pci_dev
->config
+ pos
+ PCI_EXP_LNKCAP
);
1337 lnkcap
&= (PCI_EXP_LNKCAP_SLS
| PCI_EXP_LNKCAP_MLW
|
1338 PCI_EXP_LNKCAP_ASPMS
| PCI_EXP_LNKCAP_L0SEL
|
1339 PCI_EXP_LNKCAP_L1EL
);
1340 pci_set_word(pci_dev
->config
+ pos
+ PCI_EXP_LNKCAP
, lnkcap
);
1341 pci_set_word(pci_dev
->wmask
+ pos
+ PCI_EXP_LNKCAP
,
1342 PCI_EXP_LNKCTL_ASPMC
| PCI_EXP_LNKCTL_RCB
|
1343 PCI_EXP_LNKCTL_CCC
| PCI_EXP_LNKCTL_ES
|
1344 PCI_EXP_LNKCTL_CLKREQ_EN
| PCI_EXP_LNKCTL_HAWD
);
1346 /* Link control, pass existing read-only copy. Should be writable? */
1348 /* Link status, only expose current speed and width */
1349 lnksta
= pci_get_word(pci_dev
->config
+ pos
+ PCI_EXP_LNKSTA
);
1350 lnksta
&= (PCI_EXP_LNKSTA_CLS
| PCI_EXP_LNKSTA_NLW
);
1351 pci_set_word(pci_dev
->config
+ pos
+ PCI_EXP_LNKSTA
, lnksta
);
1354 /* Slot capabilities, control, status - not needed for endpoints */
1355 pci_set_long(pci_dev
->config
+ pos
+ PCI_EXP_SLTCAP
, 0);
1356 pci_set_word(pci_dev
->config
+ pos
+ PCI_EXP_SLTCTL
, 0);
1357 pci_set_word(pci_dev
->config
+ pos
+ PCI_EXP_SLTSTA
, 0);
1359 /* Root control, capabilities, status - not needed for endpoints */
1360 pci_set_word(pci_dev
->config
+ pos
+ PCI_EXP_RTCTL
, 0);
1361 pci_set_word(pci_dev
->config
+ pos
+ PCI_EXP_RTCAP
, 0);
1362 pci_set_long(pci_dev
->config
+ pos
+ PCI_EXP_RTSTA
, 0);
1364 /* Device capabilities/control 2, pass existing read-only copy */
1365 /* Link control 2, pass existing read-only copy */
1369 if ((pos
= pci_find_cap_offset(pci_dev
, PCI_CAP_ID_PCIX
, 0))) {
1373 /* Only expose the minimum, 8 byte capability */
1374 if ((ret
= pci_add_capability(pci_dev
, PCI_CAP_ID_PCIX
, pos
, 8)) < 0) {
1378 assigned_dev_setup_cap_read(dev
, pos
, 8);
1380 /* Command register, clear upper bits, including extended modes */
1381 cmd
= pci_get_word(pci_dev
->config
+ pos
+ PCI_X_CMD
);
1382 cmd
&= (PCI_X_CMD_DPERR_E
| PCI_X_CMD_ERO
| PCI_X_CMD_MAX_READ
|
1383 PCI_X_CMD_MAX_SPLIT
);
1384 pci_set_word(pci_dev
->config
+ pos
+ PCI_X_CMD
, cmd
);
1386 /* Status register, update with emulated PCI bus location, clear
1387 * error bits, leave the rest. */
1388 status
= pci_get_long(pci_dev
->config
+ pos
+ PCI_X_STATUS
);
1389 status
&= ~(PCI_X_STATUS_BUS
| PCI_X_STATUS_DEVFN
);
1390 status
|= (pci_bus_num(pci_dev
->bus
) << 8) | pci_dev
->devfn
;
1391 status
&= ~(PCI_X_STATUS_SPL_DISC
| PCI_X_STATUS_UNX_SPL
|
1392 PCI_X_STATUS_SPL_ERR
);
1393 pci_set_long(pci_dev
->config
+ pos
+ PCI_X_STATUS
, status
);
1396 if ((pos
= pci_find_cap_offset(pci_dev
, PCI_CAP_ID_VPD
, 0))) {
1397 /* Direct R/W passthrough */
1398 if ((ret
= pci_add_capability(pci_dev
, PCI_CAP_ID_VPD
, pos
, 8)) < 0) {
1402 assigned_dev_setup_cap_read(dev
, pos
, 8);
1404 /* direct write for cap content */
1405 assigned_dev_direct_config_write(dev
, pos
+ 2, 6);
1408 /* Devices can have multiple vendor capabilities, get them all */
1409 for (pos
= 0; (pos
= pci_find_cap_offset(pci_dev
, PCI_CAP_ID_VNDR
, pos
));
1410 pos
+= PCI_CAP_LIST_NEXT
) {
1411 uint8_t len
= pci_get_byte(pci_dev
->config
+ pos
+ PCI_CAP_FLAGS
);
1412 /* Direct R/W passthrough */
1413 if ((ret
= pci_add_capability(pci_dev
, PCI_CAP_ID_VNDR
,
1418 assigned_dev_setup_cap_read(dev
, pos
, len
);
1420 /* direct write for cap content */
1421 assigned_dev_direct_config_write(dev
, pos
+ 2, len
- 2);
1424 /* If real and virtual capability list status bits differ, virtualize the
1426 if ((pci_get_word(pci_dev
->config
+ PCI_STATUS
) & PCI_STATUS_CAP_LIST
) !=
1427 (assigned_dev_pci_read_byte(pci_dev
, PCI_STATUS
) &
1428 PCI_STATUS_CAP_LIST
)) {
1429 dev
->emulate_config_read
[PCI_STATUS
] |= PCI_STATUS_CAP_LIST
;
1435 static uint32_t msix_mmio_readl(void *opaque
, target_phys_addr_t addr
)
1437 AssignedDevice
*adev
= opaque
;
1438 unsigned int offset
= addr
& 0xfff;
1439 void *page
= adev
->msix_table_page
;
1442 memcpy(&val
, (void *)((char *)page
+ offset
), 4);
1447 static uint32_t msix_mmio_readb(void *opaque
, target_phys_addr_t addr
)
1449 return ((msix_mmio_readl(opaque
, addr
& ~3)) >>
1450 (8 * (addr
& 3))) & 0xff;
1453 static uint32_t msix_mmio_readw(void *opaque
, target_phys_addr_t addr
)
1455 return ((msix_mmio_readl(opaque
, addr
& ~3)) >>
1456 (8 * (addr
& 3))) & 0xffff;
1459 static void msix_mmio_writel(void *opaque
,
1460 target_phys_addr_t addr
, uint32_t val
)
1462 AssignedDevice
*adev
= opaque
;
1463 unsigned int offset
= addr
& 0xfff;
1464 void *page
= adev
->msix_table_page
;
1466 DEBUG("write to MSI-X entry table mmio offset 0x%lx, val 0x%x\n",
1468 memcpy((void *)((char *)page
+ offset
), &val
, 4);
1471 static void msix_mmio_writew(void *opaque
,
1472 target_phys_addr_t addr
, uint32_t val
)
1474 msix_mmio_writel(opaque
, addr
& ~3,
1475 (val
& 0xffff) << (8*(addr
& 3)));
1478 static void msix_mmio_writeb(void *opaque
,
1479 target_phys_addr_t addr
, uint32_t val
)
1481 msix_mmio_writel(opaque
, addr
& ~3,
1482 (val
& 0xff) << (8*(addr
& 3)));
1485 static const MemoryRegionOps msix_mmio_ops
= {
1487 .read
= { msix_mmio_readb
, msix_mmio_readw
, msix_mmio_readl
, },
1488 .write
= { msix_mmio_writeb
, msix_mmio_writew
, msix_mmio_writel
, },
1490 .endianness
= DEVICE_NATIVE_ENDIAN
,
1493 static int assigned_dev_register_msix_mmio(AssignedDevice
*dev
)
1495 dev
->msix_table_page
= mmap(NULL
, 0x1000,
1496 PROT_READ
|PROT_WRITE
,
1497 MAP_ANONYMOUS
|MAP_PRIVATE
, 0, 0);
1498 if (dev
->msix_table_page
== MAP_FAILED
) {
1499 fprintf(stderr
, "fail allocate msix_table_page! %s\n",
1503 memset(dev
->msix_table_page
, 0, 0x1000);
1504 memory_region_init_io(&dev
->mmio
, &msix_mmio_ops
, dev
,
1505 "assigned-dev-msix", MSIX_PAGE_SIZE
);
1509 static void assigned_dev_unregister_msix_mmio(AssignedDevice
*dev
)
1511 if (!dev
->msix_table_page
)
1514 memory_region_destroy(&dev
->mmio
);
1516 if (munmap(dev
->msix_table_page
, 0x1000) == -1) {
1517 fprintf(stderr
, "error unmapping msix_table_page! %s\n",
1520 dev
->msix_table_page
= NULL
;
1523 static const VMStateDescription vmstate_assigned_device
= {
1524 .name
= "pci-assign",
1528 static void reset_assigned_device(DeviceState
*dev
)
1530 PCIDevice
*pci_dev
= DO_UPCAST(PCIDevice
, qdev
, dev
);
1531 AssignedDevice
*adev
= DO_UPCAST(AssignedDevice
, dev
, pci_dev
);
1532 char reset_file
[64];
1533 const char reset
[] = "1";
1536 snprintf(reset_file
, sizeof(reset_file
),
1537 "/sys/bus/pci/devices/%04x:%02x:%02x.%01x/reset",
1538 adev
->host
.seg
, adev
->host
.bus
, adev
->host
.dev
, adev
->host
.func
);
1541 * Issue a device reset via pci-sysfs. Note that we use write(2) here
1542 * and ignore the return value because some kernels have a bug that
1543 * returns 0 rather than bytes written on success, sending us into an
1544 * infinite retry loop using other write mechanisms.
1546 fd
= open(reset_file
, O_WRONLY
);
1548 ret
= write(fd
, reset
, strlen(reset
));
1554 * When a 0 is written to the command register, the device is logically
1555 * disconnected from the PCI bus. This avoids further DMA transfers.
1557 assigned_dev_pci_write_config(pci_dev
, PCI_COMMAND
, 0, 2);
1560 static int assigned_initfn(struct PCIDevice
*pci_dev
)
1562 AssignedDevice
*dev
= DO_UPCAST(AssignedDevice
, dev
, pci_dev
);
1566 if (!kvm_enabled()) {
1567 error_report("pci-assign: error: requires KVM support");
1571 if (!dev
->host
.seg
&& !dev
->host
.bus
&& !dev
->host
.dev
&& !dev
->host
.func
) {
1572 error_report("pci-assign: error: no host device specified");
1577 * Set up basic config space access control. Will be further refined during
1578 * device initialization.
1580 assigned_dev_emulate_config_read(dev
, 0, PCI_CONFIG_SPACE_SIZE
);
1581 assigned_dev_direct_config_read(dev
, PCI_COMMAND
, 2);
1582 assigned_dev_direct_config_read(dev
, PCI_STATUS
, 2);
1583 assigned_dev_direct_config_read(dev
, PCI_REVISION_ID
, 1);
1584 assigned_dev_direct_config_read(dev
, PCI_CLASS_PROG
, 3);
1585 assigned_dev_direct_config_read(dev
, PCI_CACHE_LINE_SIZE
, 1);
1586 assigned_dev_direct_config_read(dev
, PCI_LATENCY_TIMER
, 1);
1587 assigned_dev_direct_config_read(dev
, PCI_HEADER_TYPE
, 1);
1588 assigned_dev_direct_config_read(dev
, PCI_BIST
, 1);
1589 assigned_dev_direct_config_read(dev
, PCI_CARDBUS_CIS
, 4);
1590 assigned_dev_direct_config_read(dev
, PCI_SUBSYSTEM_VENDOR_ID
, 2);
1591 assigned_dev_direct_config_read(dev
, PCI_SUBSYSTEM_ID
, 2);
1592 assigned_dev_direct_config_read(dev
, PCI_CAPABILITY_LIST
+ 1, 7);
1593 assigned_dev_direct_config_read(dev
, PCI_MIN_GNT
, 1);
1594 assigned_dev_direct_config_read(dev
, PCI_MAX_LAT
, 1);
1595 memcpy(dev
->emulate_config_write
, dev
->emulate_config_read
,
1596 sizeof(dev
->emulate_config_read
));
1598 if (get_real_device(dev
, dev
->host
.seg
, dev
->host
.bus
,
1599 dev
->host
.dev
, dev
->host
.func
)) {
1600 error_report("pci-assign: Error: Couldn't get real device (%s)!",
1605 if (assigned_device_pci_cap_init(pci_dev
) < 0) {
1609 /* intercept MSI-X entry page in the MMIO */
1610 if (dev
->cap
.available
& ASSIGNED_DEVICE_CAP_MSIX
) {
1611 if (assigned_dev_register_msix_mmio(dev
)) {
1616 /* handle real device's MMIO/PIO BARs */
1617 if (assigned_dev_register_regions(dev
->real_device
.regions
,
1618 dev
->real_device
.region_number
,
1622 /* handle interrupt routing */
1623 e_intx
= dev
->dev
.config
[0x3d] - 1;
1624 dev
->intpin
= e_intx
;
1627 dev
->h_segnr
= dev
->host
.seg
;
1628 dev
->h_busnr
= dev
->host
.bus
;
1629 dev
->h_devfn
= PCI_DEVFN(dev
->host
.dev
, dev
->host
.func
);
1631 /* assign device to guest */
1632 r
= assign_device(dev
);
1636 /* assign irq for the device */
1637 r
= assign_irq(dev
);
1641 assigned_dev_load_option_rom(dev
);
1642 QLIST_INSERT_HEAD(&devs
, dev
, next
);
1644 add_boot_device_path(dev
->bootindex
, &pci_dev
->qdev
, NULL
);
1649 deassign_device(dev
);
1651 free_assigned_device(dev
);
1655 static int assigned_exitfn(struct PCIDevice
*pci_dev
)
1657 AssignedDevice
*dev
= DO_UPCAST(AssignedDevice
, dev
, pci_dev
);
1659 QLIST_REMOVE(dev
, next
);
1660 deassign_device(dev
);
1661 free_assigned_device(dev
);
1665 static int parse_hostaddr(DeviceState
*dev
, Property
*prop
, const char *str
)
1667 PCIHostDevice
*ptr
= qdev_get_prop_ptr(dev
, prop
);
1670 rc
= pci_parse_host_devaddr(str
, &ptr
->seg
, &ptr
->bus
, &ptr
->dev
, &ptr
->func
);
1676 static int print_hostaddr(DeviceState
*dev
, Property
*prop
, char *dest
, size_t len
)
1678 PCIHostDevice
*ptr
= qdev_get_prop_ptr(dev
, prop
);
1680 return snprintf(dest
, len
, "%02x:%02x.%x", ptr
->bus
, ptr
->dev
, ptr
->func
);
1683 PropertyInfo qdev_prop_hostaddr
= {
1684 .name
= "pci-hostaddr",
1686 .size
= sizeof(PCIHostDevice
),
1687 .parse
= parse_hostaddr
,
1688 .print
= print_hostaddr
,
1691 static PCIDeviceInfo assign_info
= {
1692 .qdev
.name
= "pci-assign",
1693 .qdev
.desc
= "pass through host pci devices to the guest",
1694 .qdev
.size
= sizeof(AssignedDevice
),
1695 .qdev
.vmsd
= &vmstate_assigned_device
,
1696 .qdev
.reset
= reset_assigned_device
,
1697 .init
= assigned_initfn
,
1698 .exit
= assigned_exitfn
,
1699 .config_read
= assigned_dev_pci_read_config
,
1700 .config_write
= assigned_dev_pci_write_config
,
1701 .qdev
.props
= (Property
[]) {
1702 DEFINE_PROP("host", AssignedDevice
, host
, qdev_prop_hostaddr
, PCIHostDevice
),
1703 DEFINE_PROP_BIT("iommu", AssignedDevice
, features
,
1704 ASSIGNED_DEVICE_USE_IOMMU_BIT
, true),
1705 DEFINE_PROP_BIT("prefer_msi", AssignedDevice
, features
,
1706 ASSIGNED_DEVICE_PREFER_MSI_BIT
, true),
1707 DEFINE_PROP_INT32("bootindex", AssignedDevice
, bootindex
, -1),
1708 DEFINE_PROP_STRING("configfd", AssignedDevice
, configfd_name
),
1709 DEFINE_PROP_END_OF_LIST(),
1713 static void assign_register_devices(void)
1715 pci_qdev_register(&assign_info
);
1718 device_init(assign_register_devices
)
1721 * Scan the assigned devices for the devices that have an option ROM, and then
1722 * load the corresponding ROM data to RAM. If an error occurs while loading an
1723 * option ROM, we just ignore that option ROM and continue with the next one.
1725 static void assigned_dev_load_option_rom(AssignedDevice
*dev
)
1727 char name
[32], rom_file
[64];
1733 /* If loading ROM from file, pci handles it */
1734 if (dev
->dev
.romfile
|| !dev
->dev
.rom_bar
)
1737 snprintf(rom_file
, sizeof(rom_file
),
1738 "/sys/bus/pci/devices/%04x:%02x:%02x.%01x/rom",
1739 dev
->host
.seg
, dev
->host
.bus
, dev
->host
.dev
, dev
->host
.func
);
1741 if (stat(rom_file
, &st
)) {
1745 if (access(rom_file
, F_OK
)) {
1746 fprintf(stderr
, "pci-assign: Insufficient privileges for %s\n",
1751 /* Write "1" to the ROM file to enable it */
1752 fp
= fopen(rom_file
, "r+");
1757 if (fwrite(&val
, 1, 1, fp
) != 1) {
1760 fseek(fp
, 0, SEEK_SET
);
1762 snprintf(name
, sizeof(name
), "%s.rom", dev
->dev
.qdev
.info
->name
);
1763 memory_region_init_ram(&dev
->dev
.rom
, &dev
->dev
.qdev
, name
, st
.st_size
);
1764 ptr
= memory_region_get_ram_ptr(&dev
->dev
.rom
);
1765 memset(ptr
, 0xff, st
.st_size
);
1767 if (!fread(ptr
, 1, st
.st_size
, fp
)) {
1768 fprintf(stderr
, "pci-assign: Cannot read from host %s\n"
1769 "\tDevice option ROM contents are probably invalid "
1770 "(check dmesg).\n\tSkip option ROM probe with rombar=0, "
1771 "or load from file with romfile=\n", rom_file
);
1772 memory_region_destroy(&dev
->dev
.rom
);
1776 pci_register_bar(&dev
->dev
, PCI_ROM_SLOT
, 0, &dev
->dev
.rom
);
1777 dev
->dev
.has_rom
= true;
1779 /* Write "0" to disable ROM */
1780 fseek(fp
, 0, SEEK_SET
);
1782 if (!fwrite(&val
, 1, 1, fp
)) {
1783 DEBUG("%s\n", "Failed to disable pci-sysfs rom file");