2 * Copyright (c) 2007, Neocleus Corporation.
3 * Copyright (c) 2007, Intel Corporation.
5 * This work is licensed under the terms of the GNU GPL, version 2. See
6 * the COPYING file in the top-level directory.
12 * This file implements direct PCI assignment to a HVM guest
16 * Interrupt Disable policy:
19 * Initialize(register_real_device)
20 * Map INTx(xc_physdev_map_pirq):
22 * - Set real Interrupt Disable bit to '1'.
23 * - Set machine_irq and assigned_device->machine_irq to '0'.
26 * Bind INTx(xc_domain_bind_pt_pci_irq):
28 * - Set real Interrupt Disable bit to '1'.
30 * - Decrement xen_pt_mapped_machine_irq[machine_irq]
31 * - Set assigned_device->machine_irq to '0'.
33 * Write to Interrupt Disable bit by guest software(xen_pt_cmd_reg_write)
35 * - Set real bit to '0' if assigned_device->machine_irq isn't '0'.
38 * - Set real bit to '1'.
41 * Initialize MSI register(xen_pt_msi_setup, xen_pt_msi_update)
42 * Bind MSI(xc_domain_update_msi_irq)
45 * - Set dev->msi->pirq to '-1'.
48 * Initialize MSI-X register(xen_pt_msix_update_one)
49 * Bind MSI-X(xc_domain_update_msi_irq)
52 * - Set entry->pirq to '-1'.
55 #include "qemu/osdep.h"
56 #include "qapi/error.h"
57 #include <sys/ioctl.h>
59 #include "hw/pci/pci.h"
60 #include "hw/qdev-properties.h"
61 #include "hw/xen/xen.h"
62 #include "hw/i386/pc.h"
63 #include "hw/xen/xen-legacy-backend.h"
65 #include "qemu/range.h"
66 #include "exec/address-spaces.h"
68 #define XEN_PT_NR_IRQS (256)
69 static uint8_t xen_pt_mapped_machine_irq[XEN_PT_NR_IRQS] = {0};
71 void xen_pt_log(const PCIDevice *d, const char *f, ...)
77 fprintf(stderr, "[%02x:%02x.%d] ", pci_dev_bus_num(d),
78 PCI_SLOT(d->devfn), PCI_FUNC(d->devfn));
80 vfprintf(stderr, f, ap);
86 static int xen_pt_pci_config_access_check(PCIDevice *d, uint32_t addr, int len)
88 /* check offset range */
90 XEN_PT_ERR(d, "Failed to access register with offset exceeding 0xFF. "
91 "(addr: 0x%02x, len: %d)\n", addr, len);
96 if ((len != 1) && (len != 2) && (len != 4)) {
97 XEN_PT_ERR(d, "Failed to access register with invalid access length. "
98 "(addr: 0x%02x, len: %d)\n", addr, len);
102 /* check offset alignment */
103 if (addr & (len - 1)) {
104 XEN_PT_ERR(d, "Failed to access register with invalid access size "
105 "alignment. (addr: 0x%02x, len: %d)\n", addr, len);
112 int xen_pt_bar_offset_to_index(uint32_t offset)
116 /* check Exp ROM BAR */
117 if (offset == PCI_ROM_ADDRESS) {
121 /* calculate BAR index */
122 index = (offset - PCI_BASE_ADDRESS_0) >> 2;
123 if (index >= PCI_NUM_REGIONS) {
130 static uint32_t xen_pt_pci_read_config(PCIDevice *d, uint32_t addr, int len)
132 XenPCIPassthroughState *s = XEN_PT_DEVICE(d);
134 XenPTRegGroup *reg_grp_entry = NULL;
135 XenPTReg *reg_entry = NULL;
138 uint32_t find_addr = addr;
140 if (xen_pt_pci_config_access_check(d, addr, len)) {
144 /* find register group entry */
145 reg_grp_entry = xen_pt_find_reg_grp(s, addr);
147 /* check 0-Hardwired register group */
148 if (reg_grp_entry->reg_grp->grp_type == XEN_PT_GRP_TYPE_HARDWIRED) {
149 /* no need to emulate, just return 0 */
155 /* read I/O device register value */
156 rc = xen_host_pci_get_block(&s->real_device, addr, (uint8_t *)&val, len);
158 XEN_PT_ERR(d, "pci_read_block failed. return value: %d.\n", rc);
159 memset(&val, 0xff, len);
162 /* just return the I/O device register value for
163 * passthrough type register group */
164 if (reg_grp_entry == NULL) {
168 /* adjust the read value to appropriate CFC-CFF window */
169 val <<= (addr & 3) << 3;
172 /* loop around the guest requested size */
173 while (emul_len > 0) {
174 /* find register entry to be emulated */
175 reg_entry = xen_pt_find_reg(reg_grp_entry, find_addr);
177 XenPTRegInfo *reg = reg_entry->reg;
178 uint32_t real_offset = reg_grp_entry->base_offset + reg->offset;
179 uint32_t valid_mask = 0xFFFFFFFF >> ((4 - emul_len) << 3);
180 uint8_t *ptr_val = NULL;
182 valid_mask <<= (find_addr - real_offset) << 3;
183 ptr_val = (uint8_t *)&val + (real_offset & 3);
185 /* do emulation based on register size */
189 rc = reg->u.b.read(s, reg_entry, ptr_val, valid_mask);
194 rc = reg->u.w.read(s, reg_entry,
195 (uint16_t *)ptr_val, valid_mask);
199 if (reg->u.dw.read) {
200 rc = reg->u.dw.read(s, reg_entry,
201 (uint32_t *)ptr_val, valid_mask);
207 xen_shutdown_fatal_error("Internal error: Invalid read "
208 "emulation. (%s, rc: %d)\n",
213 /* calculate next address to find */
214 emul_len -= reg->size;
216 find_addr = real_offset + reg->size;
219 /* nothing to do with passthrough type register,
220 * continue to find next byte */
226 /* need to shift back before returning them to pci bus emulator */
227 val >>= ((addr & 3) << 3);
230 XEN_PT_LOG_CONFIG(d, addr, val, len);
234 static void xen_pt_pci_write_config(PCIDevice *d, uint32_t addr,
235 uint32_t val, int len)
237 XenPCIPassthroughState *s = XEN_PT_DEVICE(d);
239 XenPTRegGroup *reg_grp_entry = NULL;
241 uint32_t read_val = 0, wb_mask;
243 XenPTReg *reg_entry = NULL;
244 uint32_t find_addr = addr;
245 XenPTRegInfo *reg = NULL;
246 bool wp_flag = false;
248 if (xen_pt_pci_config_access_check(d, addr, len)) {
252 XEN_PT_LOG_CONFIG(d, addr, val, len);
254 /* check unused BAR register */
255 index = xen_pt_bar_offset_to_index(addr);
256 if ((index >= 0) && (val != 0)) {
259 if (index == PCI_ROM_SLOT)
260 chk |= (uint32_t)~PCI_ROM_ADDRESS_MASK;
262 if ((chk != XEN_PT_BAR_ALLF) &&
263 (s->bases[index].bar_flag == XEN_PT_BAR_FLAG_UNUSED)) {
264 XEN_PT_WARN(d, "Guest attempt to set address to unused "
265 "Base Address Register. (addr: 0x%02x, len: %d)\n",
270 /* find register group entry */
271 reg_grp_entry = xen_pt_find_reg_grp(s, addr);
273 /* check 0-Hardwired register group */
274 if (reg_grp_entry->reg_grp->grp_type == XEN_PT_GRP_TYPE_HARDWIRED) {
275 /* ignore silently */
276 XEN_PT_WARN(d, "Access to 0-Hardwired register. "
277 "(addr: 0x%02x, len: %d)\n", addr, len);
282 rc = xen_host_pci_get_block(&s->real_device, addr,
283 (uint8_t *)&read_val, len);
285 XEN_PT_ERR(d, "pci_read_block failed. return value: %d.\n", rc);
286 memset(&read_val, 0xff, len);
289 wb_mask = 0xFFFFFFFF >> ((4 - len) << 3);
292 /* pass directly to the real device for passthrough type register group */
293 if (reg_grp_entry == NULL) {
294 if (!s->permissive) {
301 memory_region_transaction_begin();
302 pci_default_write_config(d, addr, val, len);
304 /* adjust the read and write value to appropriate CFC-CFF window */
305 read_val <<= (addr & 3) << 3;
306 val <<= (addr & 3) << 3;
309 /* loop around the guest requested size */
310 while (emul_len > 0) {
311 /* find register entry to be emulated */
312 reg_entry = xen_pt_find_reg(reg_grp_entry, find_addr);
314 reg = reg_entry->reg;
315 uint32_t real_offset = reg_grp_entry->base_offset + reg->offset;
316 uint32_t valid_mask = 0xFFFFFFFF >> ((4 - emul_len) << 3);
317 uint8_t *ptr_val = NULL;
318 uint32_t wp_mask = reg->emu_mask | reg->ro_mask;
320 valid_mask <<= (find_addr - real_offset) << 3;
321 ptr_val = (uint8_t *)&val + (real_offset & 3);
322 if (!s->permissive) {
323 wp_mask |= reg->res_mask;
325 if (wp_mask == (0xFFFFFFFF >> ((4 - reg->size) << 3))) {
326 wb_mask &= ~((wp_mask >> ((find_addr - real_offset) << 3))
327 << ((len - emul_len) << 3));
330 /* do emulation based on register size */
333 if (reg->u.b.write) {
334 rc = reg->u.b.write(s, reg_entry, ptr_val,
335 read_val >> ((real_offset & 3) << 3),
340 if (reg->u.w.write) {
341 rc = reg->u.w.write(s, reg_entry, (uint16_t *)ptr_val,
342 (read_val >> ((real_offset & 3) << 3)),
347 if (reg->u.dw.write) {
348 rc = reg->u.dw.write(s, reg_entry, (uint32_t *)ptr_val,
349 (read_val >> ((real_offset & 3) << 3)),
356 xen_shutdown_fatal_error("Internal error: Invalid write"
357 " emulation. (%s, rc: %d)\n",
362 /* calculate next address to find */
363 emul_len -= reg->size;
365 find_addr = real_offset + reg->size;
368 /* nothing to do with passthrough type register,
369 * continue to find next byte */
370 if (!s->permissive) {
371 wb_mask &= ~(0xff << ((len - emul_len) << 3));
372 /* Unused BARs will make it here, but we don't want to issue
373 * warnings for writes to them (bogus writes get dealt with
385 /* need to shift back before passing them to xen_host_pci_set_block. */
386 val >>= (addr & 3) << 3;
388 memory_region_transaction_commit();
391 if (wp_flag && !s->permissive_warned) {
392 s->permissive_warned = true;
393 xen_pt_log(d, "Write-back to unknown field 0x%02x (partially) inhibited (0x%0*x)\n",
394 addr, len * 2, wb_mask);
395 xen_pt_log(d, "If the device doesn't work, try enabling permissive mode\n");
396 xen_pt_log(d, "(unsafe) and if it helps report the problem to xen-devel\n");
398 for (index = 0; wb_mask; index += len) {
399 /* unknown regs are passed through */
400 while (!(wb_mask & 0xff)) {
408 } while (wb_mask & 0xff);
409 rc = xen_host_pci_set_block(&s->real_device, addr + index,
410 (uint8_t *)&val + index, len);
413 XEN_PT_ERR(d, "xen_host_pci_set_block failed. return value: %d.\n", rc);
418 /* register regions */
420 static uint64_t xen_pt_bar_read(void *o, hwaddr addr,
424 /* if this function is called, that probably means that there is a
425 * misconfiguration of the IOMMU. */
426 XEN_PT_ERR(d, "Should not read BAR through QEMU. @0x"TARGET_FMT_plx"\n",
430 static void xen_pt_bar_write(void *o, hwaddr addr, uint64_t val,
434 /* Same comment as xen_pt_bar_read function */
435 XEN_PT_ERR(d, "Should not write BAR through QEMU. @0x"TARGET_FMT_plx"\n",
439 static const MemoryRegionOps ops = {
440 .endianness = DEVICE_NATIVE_ENDIAN,
441 .read = xen_pt_bar_read,
442 .write = xen_pt_bar_write,
445 static int xen_pt_register_regions(XenPCIPassthroughState *s, uint16_t *cmd)
448 XenHostPCIDevice *d = &s->real_device;
450 /* Register PIO/MMIO BARs */
451 for (i = 0; i < PCI_ROM_SLOT; i++) {
452 XenHostPCIIORegion *r = &d->io_regions[i];
455 if (r->base_addr == 0 || r->size == 0) {
459 s->bases[i].access.u = r->base_addr;
461 if (r->type & XEN_HOST_PCI_REGION_TYPE_IO) {
462 type = PCI_BASE_ADDRESS_SPACE_IO;
463 *cmd |= PCI_COMMAND_IO;
465 type = PCI_BASE_ADDRESS_SPACE_MEMORY;
466 if (r->type & XEN_HOST_PCI_REGION_TYPE_PREFETCH) {
467 type |= PCI_BASE_ADDRESS_MEM_PREFETCH;
469 if (r->type & XEN_HOST_PCI_REGION_TYPE_MEM_64) {
470 type |= PCI_BASE_ADDRESS_MEM_TYPE_64;
472 *cmd |= PCI_COMMAND_MEMORY;
475 memory_region_init_io(&s->bar[i], OBJECT(s), &ops, &s->dev,
476 "xen-pci-pt-bar", r->size);
477 pci_register_bar(&s->dev, i, type, &s->bar[i]);
479 XEN_PT_LOG(&s->dev, "IO region %i registered (size=0x%08"PRIx64
480 " base_addr=0x%08"PRIx64" type: %#x)\n",
481 i, r->size, r->base_addr, type);
484 /* Register expansion ROM address */
485 if (d->rom.base_addr && d->rom.size) {
486 uint32_t bar_data = 0;
488 /* Re-set BAR reported by OS, otherwise ROM can't be read. */
489 if (xen_host_pci_get_long(d, PCI_ROM_ADDRESS, &bar_data)) {
492 if ((bar_data & PCI_ROM_ADDRESS_MASK) == 0) {
493 bar_data |= d->rom.base_addr & PCI_ROM_ADDRESS_MASK;
494 xen_host_pci_set_long(d, PCI_ROM_ADDRESS, bar_data);
497 s->bases[PCI_ROM_SLOT].access.maddr = d->rom.base_addr;
499 memory_region_init_io(&s->rom, OBJECT(s), &ops, &s->dev,
500 "xen-pci-pt-rom", d->rom.size);
501 pci_register_bar(&s->dev, PCI_ROM_SLOT, PCI_BASE_ADDRESS_MEM_PREFETCH,
504 XEN_PT_LOG(&s->dev, "Expansion ROM registered (size=0x%08"PRIx64
505 " base_addr=0x%08"PRIx64")\n",
506 d->rom.size, d->rom.base_addr);
509 xen_pt_register_vga_regions(d);
515 static int xen_pt_bar_from_region(XenPCIPassthroughState *s, MemoryRegion *mr)
519 for (i = 0; i < PCI_NUM_REGIONS - 1; i++) {
520 if (mr == &s->bar[i]) {
531 * This function checks if an io_region overlaps an io_region from another
532 * device. The io_region to check is provided with (addr, size and type)
533 * A callback can be provided and will be called for every region that is
535 * The return value indicates if the region is overlappsed */
536 struct CheckBarArgs {
537 XenPCIPassthroughState *s;
543 static void xen_pt_check_bar_overlap(PCIBus *bus, PCIDevice *d, void *opaque)
545 struct CheckBarArgs *arg = opaque;
546 XenPCIPassthroughState *s = arg->s;
547 uint8_t type = arg->type;
550 if (d->devfn == s->dev.devfn) {
554 /* xxx: This ignores bridges. */
555 for (i = 0; i < PCI_NUM_REGIONS; i++) {
556 const PCIIORegion *r = &d->io_regions[i];
561 if ((type & PCI_BASE_ADDRESS_SPACE_IO)
562 != (r->type & PCI_BASE_ADDRESS_SPACE_IO)) {
566 if (ranges_overlap(arg->addr, arg->size, r->addr, r->size)) {
568 "Overlapped to device [%02x:%02x.%d] Region: %i"
569 " (addr: %#"FMT_PCIBUS", len: %#"FMT_PCIBUS")\n",
570 pci_bus_num(bus), PCI_SLOT(d->devfn),
571 PCI_FUNC(d->devfn), i, r->addr, r->size);
577 static void xen_pt_region_update(XenPCIPassthroughState *s,
578 MemoryRegionSection *sec, bool adding)
580 PCIDevice *d = &s->dev;
581 MemoryRegion *mr = sec->mr;
584 int op = adding ? DPCI_ADD_MAPPING : DPCI_REMOVE_MAPPING;
585 struct CheckBarArgs args = {
587 .addr = sec->offset_within_address_space,
588 .size = int128_get64(sec->size),
592 bar = xen_pt_bar_from_region(s, mr);
593 if (bar == -1 && (!s->msix || &s->msix->mmio != mr)) {
597 if (s->msix && &s->msix->mmio == mr) {
599 s->msix->mmio_base_addr = sec->offset_within_address_space;
600 rc = xen_pt_msix_update_remap(s, s->msix->bar_index);
605 args.type = d->io_regions[bar].type;
606 pci_for_each_device(pci_get_bus(d), pci_dev_bus_num(d),
607 xen_pt_check_bar_overlap, &args);
609 XEN_PT_WARN(d, "Region: %d (addr: %#"FMT_PCIBUS
610 ", len: %#"FMT_PCIBUS") is overlapped.\n",
611 bar, sec->offset_within_address_space,
612 int128_get64(sec->size));
615 if (d->io_regions[bar].type & PCI_BASE_ADDRESS_SPACE_IO) {
616 uint32_t guest_port = sec->offset_within_address_space;
617 uint32_t machine_port = s->bases[bar].access.pio_base;
618 uint32_t size = int128_get64(sec->size);
619 rc = xc_domain_ioport_mapping(xen_xc, xen_domid,
620 guest_port, machine_port, size,
623 XEN_PT_ERR(d, "%s ioport mapping failed! (err: %i)\n",
624 adding ? "create new" : "remove old", errno);
627 pcibus_t guest_addr = sec->offset_within_address_space;
628 pcibus_t machine_addr = s->bases[bar].access.maddr
629 + sec->offset_within_region;
630 pcibus_t size = int128_get64(sec->size);
631 rc = xc_domain_memory_mapping(xen_xc, xen_domid,
632 XEN_PFN(guest_addr + XC_PAGE_SIZE - 1),
633 XEN_PFN(machine_addr + XC_PAGE_SIZE - 1),
634 XEN_PFN(size + XC_PAGE_SIZE - 1),
637 XEN_PT_ERR(d, "%s mem mapping failed! (err: %i)\n",
638 adding ? "create new" : "remove old", errno);
643 static void xen_pt_region_add(MemoryListener *l, MemoryRegionSection *sec)
645 XenPCIPassthroughState *s = container_of(l, XenPCIPassthroughState,
648 memory_region_ref(sec->mr);
649 xen_pt_region_update(s, sec, true);
652 static void xen_pt_region_del(MemoryListener *l, MemoryRegionSection *sec)
654 XenPCIPassthroughState *s = container_of(l, XenPCIPassthroughState,
657 xen_pt_region_update(s, sec, false);
658 memory_region_unref(sec->mr);
661 static void xen_pt_io_region_add(MemoryListener *l, MemoryRegionSection *sec)
663 XenPCIPassthroughState *s = container_of(l, XenPCIPassthroughState,
666 memory_region_ref(sec->mr);
667 xen_pt_region_update(s, sec, true);
670 static void xen_pt_io_region_del(MemoryListener *l, MemoryRegionSection *sec)
672 XenPCIPassthroughState *s = container_of(l, XenPCIPassthroughState,
675 xen_pt_region_update(s, sec, false);
676 memory_region_unref(sec->mr);
679 static const MemoryListener xen_pt_memory_listener = {
680 .region_add = xen_pt_region_add,
681 .region_del = xen_pt_region_del,
685 static const MemoryListener xen_pt_io_listener = {
686 .region_add = xen_pt_io_region_add,
687 .region_del = xen_pt_io_region_del,
692 xen_igd_passthrough_isa_bridge_create(XenPCIPassthroughState *s,
693 XenHostPCIDevice *dev)
696 PCIDevice *d = &s->dev;
698 gpu_dev_id = dev->device_id;
699 igd_passthrough_isa_bridge_create(pci_get_bus(d), gpu_dev_id);
703 static void xen_pt_destroy(PCIDevice *d) {
705 XenPCIPassthroughState *s = XEN_PT_DEVICE(d);
706 XenHostPCIDevice *host_dev = &s->real_device;
707 uint8_t machine_irq = s->machine_irq;
711 if (machine_irq && !xen_host_pci_device_closed(&s->real_device)) {
712 intx = xen_pt_pci_intx(s);
713 rc = xc_domain_unbind_pt_irq(xen_xc, xen_domid, machine_irq,
716 PCI_SLOT(s->dev.devfn),
720 XEN_PT_ERR(d, "unbinding of interrupt INT%c failed."
721 " (machine irq: %i, err: %d)"
722 " But bravely continuing on..\n",
723 'a' + intx, machine_irq, errno);
727 /* N.B. xen_pt_config_delete takes care of freeing them. */
729 xen_pt_msi_disable(s);
732 xen_pt_msix_disable(s);
736 xen_pt_mapped_machine_irq[machine_irq]--;
738 if (xen_pt_mapped_machine_irq[machine_irq] == 0) {
739 rc = xc_physdev_unmap_pirq(xen_xc, xen_domid, machine_irq);
742 XEN_PT_ERR(d, "unmapping of interrupt %i failed. (err: %d)"
743 " But bravely continuing on..\n",
750 /* delete all emulated config registers */
751 xen_pt_config_delete(s);
753 xen_pt_unregister_vga_regions(host_dev);
755 if (s->listener_set) {
756 memory_listener_unregister(&s->memory_listener);
757 memory_listener_unregister(&s->io_listener);
758 s->listener_set = false;
760 if (!xen_host_pci_device_closed(&s->real_device)) {
761 xen_host_pci_device_put(&s->real_device);
766 static void xen_pt_realize(PCIDevice *d, Error **errp)
768 XenPCIPassthroughState *s = XEN_PT_DEVICE(d);
770 uint8_t machine_irq = 0, scratch;
772 int pirq = XEN_PT_UNASSIGNED_PIRQ;
775 /* register real device */
776 XEN_PT_LOG(d, "Assigning real physical device %02x:%02x.%d"
778 s->hostaddr.bus, s->hostaddr.slot, s->hostaddr.function,
781 xen_host_pci_device_get(&s->real_device,
782 s->hostaddr.domain, s->hostaddr.bus,
783 s->hostaddr.slot, s->hostaddr.function,
786 error_append_hint(&err, "Failed to \"open\" the real pci device");
787 error_propagate(errp, err);
791 s->is_virtfn = s->real_device.is_virtfn;
793 XEN_PT_LOG(d, "%04x:%02x:%02x.%d is a SR-IOV Virtual Function\n",
794 s->real_device.domain, s->real_device.bus,
795 s->real_device.dev, s->real_device.func);
798 /* Initialize virtualized PCI configuration (Extended 256 Bytes) */
799 memset(d->config, 0, PCI_CONFIG_SPACE_SIZE);
801 s->memory_listener = xen_pt_memory_listener;
802 s->io_listener = xen_pt_io_listener;
804 /* Setup VGA bios for passthrough GFX */
805 if ((s->real_device.domain == 0) && (s->real_device.bus == 0) &&
806 (s->real_device.dev == 2) && (s->real_device.func == 0)) {
807 if (!is_igd_vga_passthrough(&s->real_device)) {
808 error_setg(errp, "Need to enable igd-passthru if you're trying"
809 " to passthrough IGD GFX");
810 xen_host_pci_device_put(&s->real_device);
814 xen_pt_setup_vga(s, &s->real_device, &err);
816 error_append_hint(&err, "Setup VGA BIOS of passthrough"
818 error_propagate(errp, err);
819 xen_host_pci_device_put(&s->real_device);
823 /* Register ISA bridge for passthrough GFX. */
824 xen_igd_passthrough_isa_bridge_create(s, &s->real_device);
827 /* Handle real device's MMIO/PIO BARs */
828 xen_pt_register_regions(s, &cmd);
830 /* reinitialize each config register to be emulated */
831 xen_pt_config_init(s, &err);
833 error_append_hint(&err, "PCI Config space initialisation failed");
834 error_propagate(errp, err);
840 rc = xen_host_pci_get_byte(&s->real_device, PCI_INTERRUPT_PIN, &scratch);
842 error_setg_errno(errp, errno, "Failed to read PCI_INTERRUPT_PIN");
846 XEN_PT_LOG(d, "no pin interrupt\n");
850 machine_irq = s->real_device.irq;
851 if (machine_irq == 0) {
852 XEN_PT_LOG(d, "machine irq is 0\n");
853 cmd |= PCI_COMMAND_INTX_DISABLE;
857 rc = xc_physdev_map_pirq(xen_xc, xen_domid, machine_irq, &pirq);
859 error_setg_errno(errp, errno, "Mapping machine irq %u to"
860 " pirq %i failed", machine_irq, pirq);
862 /* Disable PCI intx assertion (turn on bit10 of devctl) */
863 cmd |= PCI_COMMAND_INTX_DISABLE;
868 s->machine_irq = pirq;
869 xen_pt_mapped_machine_irq[machine_irq]++;
872 /* bind machine_irq to device */
873 if (machine_irq != 0) {
874 uint8_t e_intx = xen_pt_pci_intx(s);
876 rc = xc_domain_bind_pt_pci_irq(xen_xc, xen_domid, machine_irq,
881 error_setg_errno(errp, errno, "Binding of interrupt %u failed",
884 /* Disable PCI intx assertion (turn on bit10 of devctl) */
885 cmd |= PCI_COMMAND_INTX_DISABLE;
886 xen_pt_mapped_machine_irq[machine_irq]--;
888 if (xen_pt_mapped_machine_irq[machine_irq] == 0) {
889 if (xc_physdev_unmap_pirq(xen_xc, xen_domid, machine_irq)) {
890 error_setg_errno(errp, errno, "Unmapping of machine"
891 " interrupt %u failed", machine_irq);
902 rc = xen_host_pci_get_word(&s->real_device, PCI_COMMAND, &val);
904 error_setg_errno(errp, errno, "Failed to read PCI_COMMAND");
908 rc = xen_host_pci_set_word(&s->real_device, PCI_COMMAND, val);
910 error_setg_errno(errp, errno, "Failed to write PCI_COMMAND"
917 memory_listener_register(&s->memory_listener, &address_space_memory);
918 memory_listener_register(&s->io_listener, &address_space_io);
919 s->listener_set = true;
921 "Real physical device %02x:%02x.%d registered successfully\n",
922 s->hostaddr.bus, s->hostaddr.slot, s->hostaddr.function);
927 for (i = 0; i < PCI_ROM_SLOT; i++) {
928 object_unparent(OBJECT(&s->bar[i]));
930 object_unparent(OBJECT(&s->rom));
936 static void xen_pt_unregister_device(PCIDevice *d)
941 static Property xen_pci_passthrough_properties[] = {
942 DEFINE_PROP_PCI_HOST_DEVADDR("hostaddr", XenPCIPassthroughState, hostaddr),
943 DEFINE_PROP_BOOL("permissive", XenPCIPassthroughState, permissive, false),
944 DEFINE_PROP_END_OF_LIST(),
947 static void xen_pci_passthrough_instance_init(Object *obj)
949 /* QEMU_PCI_CAP_EXPRESS initialization does not depend on QEMU command
950 * line, therefore, no need to wait to realize like other devices */
951 PCI_DEVICE(obj)->cap_present |= QEMU_PCI_CAP_EXPRESS;
954 static void xen_pci_passthrough_class_init(ObjectClass *klass, void *data)
956 DeviceClass *dc = DEVICE_CLASS(klass);
957 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
959 k->realize = xen_pt_realize;
960 k->exit = xen_pt_unregister_device;
961 k->config_read = xen_pt_pci_read_config;
962 k->config_write = xen_pt_pci_write_config;
963 set_bit(DEVICE_CATEGORY_MISC, dc->categories);
964 dc->desc = "Assign an host PCI device with Xen";
965 dc->props = xen_pci_passthrough_properties;
968 static void xen_pci_passthrough_finalize(Object *obj)
970 XenPCIPassthroughState *s = XEN_PT_DEVICE(obj);
972 xen_pt_msix_delete(s);
975 static const TypeInfo xen_pci_passthrough_info = {
976 .name = TYPE_XEN_PT_DEVICE,
977 .parent = TYPE_PCI_DEVICE,
978 .instance_size = sizeof(XenPCIPassthroughState),
979 .instance_finalize = xen_pci_passthrough_finalize,
980 .class_init = xen_pci_passthrough_class_init,
981 .instance_init = xen_pci_passthrough_instance_init,
982 .interfaces = (InterfaceInfo[]) {
983 { INTERFACE_CONVENTIONAL_PCI_DEVICE },
984 { INTERFACE_PCIE_DEVICE },
989 static void xen_pci_passthrough_register_types(void)
991 type_register_static(&xen_pci_passthrough_info);
994 type_init(xen_pci_passthrough_register_types)