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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH] pci-assign: Remove
Legacy PCI device assignment has been removed from Linux in 4.12,
and had been deprecated 2 years ago there. We can remove it from
QEMU as well.
The ROM loading code was shared with Xen PCI passthrough, so move
it to hw/xen.
Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>
Cc: Anthony Perard <anthony.perard@xxxxxxxxxx>
Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx
Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
---
Xen parts only compile-tested.
docs/qdev-device-use.txt | 12 +-
hw/i386/Makefile.objs | 1 -
hw/i386/kvm/Makefile.objs | 2 +-
hw/i386/kvm/pci-assign.c | 1883 --------------------
hw/xen/Makefile.objs | 1 +
.../xen_pt_load_rom.c} | 4 +-
include/hw/pci/pci-assign.h | 27 -
qdev-monitor.c | 1 -
scripts/device-crash-test | 2 -
9 files changed, 6 insertions(+), 1927 deletions(-)
delete mode 100644 hw/i386/kvm/pci-assign.c
rename hw/{i386/pci-assign-load-rom.c => xen/xen_pt_load_rom.c} (96%)
delete mode 100644 include/hw/pci/pci-assign.h
diff --git a/docs/qdev-device-use.txt b/docs/qdev-device-use.txt
index 1f297b5e9c..8f188d1d0b 100644
--- a/docs/qdev-device-use.txt
+++ b/docs/qdev-device-use.txt
@@ -366,17 +366,9 @@ bus=PCI-BUS,addr=DEVFN to control the PCI device address,
as usual.
=== Host Device Assignment ===
QEMU supports assigning host PCI devices (qemu-kvm only at this time)
-and host USB devices.
+and host USB devices. PCI devices can only be assigned with -device:
-The old way to assign a host PCI device is
-
- -pcidevice host=ADDR,dma=none,id=ID
-
-The new way is
-
- -device pci-assign,host=ADDR,iommu=IOMMU,id=ID
-
-The old dma=none becomes iommu=off with -device.
+ -device vfio-pci,host=ADDR,id=ID
The old way to assign a host USB device is
diff --git a/hw/i386/Makefile.objs b/hw/i386/Makefile.objs
index 909ead6a77..2e5e1299ad 100644
--- a/hw/i386/Makefile.objs
+++ b/hw/i386/Makefile.objs
@@ -8,4 +8,3 @@ obj-$(CONFIG_XEN) += ../xenpv/ xen/
obj-y += kvmvapic.o
obj-y += acpi-build.o
-obj-y += pci-assign-load-rom.o
diff --git a/hw/i386/kvm/Makefile.objs b/hw/i386/kvm/Makefile.objs
index d8bce209bf..4224ed900e 100644
--- a/hw/i386/kvm/Makefile.objs
+++ b/hw/i386/kvm/Makefile.objs
@@ -1 +1 @@
-obj-y += clock.o apic.o i8259.o ioapic.o i8254.o pci-assign.o
+obj-y += clock.o apic.o i8259.o ioapic.o i8254.o
diff --git a/hw/xen/Makefile.objs b/hw/xen/Makefile.objs
index 64a70bc6cb..9ea5c73423 100644
--- a/hw/xen/Makefile.objs
+++ b/hw/xen/Makefile.objs
@@ -3,3 +3,4 @@ common-obj-$(CONFIG_XEN) += xen_backend.o xen_devconfig.o
xen_pvdev.o xen-common
obj-$(CONFIG_XEN_PCI_PASSTHROUGH) += xen-host-pci-device.o
obj-$(CONFIG_XEN_PCI_PASSTHROUGH) += xen_pt.o xen_pt_config_init.o
xen_pt_graphics.o xen_pt_msi.o
+obj-$(CONFIG_XEN_PCI_PASSTHROUGH) += xen_pt_load_rom.o
diff --git a/hw/i386/pci-assign-load-rom.c b/hw/xen/xen_pt_load_rom.c
similarity index 96%
rename from hw/i386/pci-assign-load-rom.c
rename to hw/xen/xen_pt_load_rom.c
index 43429b66be..2bc3b6c092 100644
--- a/hw/i386/pci-assign-load-rom.c
+++ b/hw/xen/xen_pt_load_rom.c
@@ -12,7 +12,7 @@
#include "qemu/range.h"
#include "sysemu/sysemu.h"
#include "hw/pci/pci.h"
-#include "hw/pci/pci-assign.h"
+#include "xen_pt.h"
/*
* Scan the assigned devices for the devices that have an option ROM, and then
@@ -80,7 +80,7 @@ close_rom:
fseek(fp, 0, SEEK_SET);
val = 0;
if (!fwrite(&val, 1, 1, fp)) {
- DEBUG("%s\n", "Failed to disable pci-sysfs rom file");
+ XEN_PT_WARN("%s\n", "Failed to disable pci-sysfs rom file");
}
fclose(fp);
diff --git a/include/hw/pci/pci-assign.h b/include/hw/pci/pci-assign.h
deleted file mode 100644
index 55f42c56fa..0000000000
--- a/include/hw/pci/pci-assign.h
+++ /dev/null
@@ -1,27 +0,0 @@
-/*
- * This work is licensed under the terms of the GNU GPL, version 2. See
- * the COPYING file in the top-level directory.
- *
- * Just split from hw/i386/kvm/pci-assign.c.
- */
-#ifndef PCI_ASSIGN_H
-#define PCI_ASSIGN_H
-
-#include "hw/pci/pci.h"
-
-//#define DEVICE_ASSIGNMENT_DEBUG
-
-#ifdef DEVICE_ASSIGNMENT_DEBUG
-#define DEBUG(fmt, ...) \
- do { \
- fprintf(stderr, "%s: " fmt, __func__ , __VA_ARGS__); \
- } while (0)
-#else
-#define DEBUG(fmt, ...)
-#endif
-
-void *pci_assign_dev_load_option_rom(PCIDevice *dev, struct Object *owner,
- int *size, unsigned int domain,
- unsigned int bus, unsigned int slot,
- unsigned int function);
-#endif /* PCI_ASSIGN_H */
diff --git a/qdev-monitor.c b/qdev-monitor.c
index 8fd6df93d2..b4abb4b5ea 100644
--- a/qdev-monitor.c
+++ b/qdev-monitor.c
@@ -46,7 +46,6 @@ typedef struct QDevAlias
static const QDevAlias qdev_alias_table[] = {
{ "e1000", "e1000-82540em" },
{ "ich9-ahci", "ahci" },
- { "kvm-pci-assign", "pci-assign" },
{ "lsi53c895a", "lsi" },
{ "virtio-9p-ccw", "virtio-9p", QEMU_ARCH_S390X },
{ "virtio-9p-pci", "virtio-9p", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
diff --git a/scripts/device-crash-test b/scripts/device-crash-test
index 043b24a4aa..c11fd81c52 100755
--- a/scripts/device-crash-test
+++ b/scripts/device-crash-test
@@ -102,7 +102,6 @@ ERROR_WHITELIST = [
{'device':'ivshmem', 'expected':True}, # You must specify
either 'shm' or 'chardev'
{'device':'ivshmem-doorbell', 'expected':True}, # You must specify
a 'chardev'
{'device':'ivshmem-plain', 'expected':True}, # You must specify
a 'memdev'
- {'device':'kvm-pci-assign', 'expected':True}, # no host device
specified
{'device':'loader', 'expected':True}, # please include
valid arguments
{'device':'nand', 'expected':True}, # Unsupported NAND
block size 0x1
{'device':'nvdimm', 'expected':True}, # 'memdev' property
is not set
@@ -165,7 +164,6 @@ ERROR_WHITELIST = [
# KVM-specific devices shouldn't be tried without accel=kvm:
{'accel':'(?!kvm).*', 'device':'kvmclock', 'expected':True},
- {'accel':'(?!kvm).*', 'device':'kvm-pci-assign', 'expected':True},
# xen-specific machines and devices:
{'accel':'(?!xen).*', 'machine':'xen.*', 'expected':True},
diff --git a/hw/i386/kvm/pci-assign.c b/hw/i386/kvm/pci-assign.c
deleted file mode 100644
index 33e20cb3e8..0000000000
--- a/hw/i386/kvm/pci-assign.c
+++ /dev/null
@@ -1,1883 +0,0 @@
-/*
- * Copyright (c) 2007, Neocleus Corporation.
- *
- * This work is licensed under the terms of the GNU GPL, version 2. See
- * the COPYING file in the top-level directory.
- *
- *
- * Assign a PCI device from the host to a guest VM.
- *
- * This implementation uses the classic device assignment interface of KVM
- * and is only available on x86 hosts. It is expected to be obsoleted by VFIO
- * based device assignment.
- *
- * Adapted for KVM (qemu-kvm) by Qumranet. QEMU version was based on qemu-kvm
- * revision 4144fe9d48. See its repository for the history.
- *
- * Copyright (c) 2007, Neocleus, Alex Novik (alex@xxxxxxxxxxxx)
- * Copyright (c) 2007, Neocleus, Guy Zana (guy@xxxxxxxxxxxx)
- * Copyright (C) 2008, Qumranet, Amit Shah (amit.shah@xxxxxxxxxxxx)
- * Copyright (C) 2008, Red Hat, Amit Shah (amit.shah@xxxxxxxxxx)
- * Copyright (C) 2008, IBM, Muli Ben-Yehuda (muli@xxxxxxxxxx)
- */
-
-#include "qemu/osdep.h"
-#include <linux/kvm.h>
-#include "qapi/error.h"
-#include "hw/hw.h"
-#include "hw/i386/pc.h"
-#include "qemu/error-report.h"
-#include "ui/console.h"
-#include "hw/loader.h"
-#include "monitor/monitor.h"
-#include "qemu/range.h"
-#include "sysemu/sysemu.h"
-#include "hw/pci/pci.h"
-#include "hw/pci/msi.h"
-#include "kvm_i386.h"
-#include "hw/pci/pci-assign.h"
-
-/* From linux/ioport.h */
-#define IORESOURCE_IO 0x00000100 /* Resource type */
-#define IORESOURCE_MEM 0x00000200
-#define IORESOURCE_IRQ 0x00000400
-#define IORESOURCE_DMA 0x00000800
-#define IORESOURCE_PREFETCH 0x00002000 /* No side effects */
-#define IORESOURCE_MEM_64 0x00100000
-
-typedef struct PCIRegion {
- int type; /* Memory or port I/O */
- int valid;
- uint64_t base_addr;
- uint64_t size; /* size of the region */
- int resource_fd;
-} PCIRegion;
-
-typedef struct PCIDevRegions {
- uint8_t bus, dev, func; /* Bus inside domain, device and function */
- int irq; /* IRQ number */
- uint16_t region_number; /* number of active regions */
-
- /* Port I/O or MMIO Regions */
- PCIRegion regions[PCI_NUM_REGIONS - 1];
- int config_fd;
-} PCIDevRegions;
-
-typedef struct AssignedDevRegion {
- MemoryRegion container;
- MemoryRegion real_iomem;
- union {
- uint8_t *r_virtbase; /* mmapped access address for memory regions */
- uint32_t r_baseport; /* the base guest port for I/O regions */
- } u;
- pcibus_t e_size; /* emulated size of region in bytes */
- pcibus_t r_size; /* real size of region in bytes */
- PCIRegion *region;
-} AssignedDevRegion;
-
-#define ASSIGNED_DEVICE_PREFER_MSI_BIT 0
-#define ASSIGNED_DEVICE_SHARE_INTX_BIT 1
-
-#define ASSIGNED_DEVICE_PREFER_MSI_MASK (1 << ASSIGNED_DEVICE_PREFER_MSI_BIT)
-#define ASSIGNED_DEVICE_SHARE_INTX_MASK (1 << ASSIGNED_DEVICE_SHARE_INTX_BIT)
-
-typedef struct MSIXTableEntry {
- uint32_t addr_lo;
- uint32_t addr_hi;
- uint32_t data;
- uint32_t ctrl;
-} MSIXTableEntry;
-
-typedef enum AssignedIRQType {
- ASSIGNED_IRQ_NONE = 0,
- ASSIGNED_IRQ_INTX_HOST_INTX,
- ASSIGNED_IRQ_INTX_HOST_MSI,
- ASSIGNED_IRQ_MSI,
- ASSIGNED_IRQ_MSIX
-} AssignedIRQType;
-
-typedef struct AssignedDevice {
- PCIDevice dev;
- PCIHostDeviceAddress host;
- uint32_t dev_id;
- uint32_t features;
- int intpin;
- AssignedDevRegion v_addrs[PCI_NUM_REGIONS - 1];
- PCIDevRegions real_device;
- PCIINTxRoute intx_route;
- AssignedIRQType assigned_irq_type;
- struct {
-#define ASSIGNED_DEVICE_CAP_MSI (1 << 0)
-#define ASSIGNED_DEVICE_CAP_MSIX (1 << 1)
- uint32_t available;
-#define ASSIGNED_DEVICE_MSI_ENABLED (1 << 0)
-#define ASSIGNED_DEVICE_MSIX_ENABLED (1 << 1)
-#define ASSIGNED_DEVICE_MSIX_MASKED (1 << 2)
- uint32_t state;
- } cap;
- uint8_t emulate_config_read[PCI_CONFIG_SPACE_SIZE];
- uint8_t emulate_config_write[PCI_CONFIG_SPACE_SIZE];
- int msi_virq_nr;
- int *msi_virq;
- MSIXTableEntry *msix_table;
- hwaddr msix_table_addr;
- uint16_t msix_table_size;
- uint16_t msix_max;
- MemoryRegion mmio;
- char *configfd_name;
- int32_t bootindex;
-} AssignedDevice;
-
-#define TYPE_PCI_ASSIGN "kvm-pci-assign"
-#define PCI_ASSIGN(obj) OBJECT_CHECK(AssignedDevice, (obj), TYPE_PCI_ASSIGN)
-
-static void assigned_dev_update_irq_routing(PCIDevice *dev);
-
-static void assigned_dev_load_option_rom(AssignedDevice *dev);
-
-static void assigned_dev_unregister_msix_mmio(AssignedDevice *dev);
-
-static uint64_t assigned_dev_ioport_rw(AssignedDevRegion *dev_region,
- hwaddr addr, int size,
- uint64_t *data)
-{
- uint64_t val = 0;
- int fd = dev_region->region->resource_fd;
-
- if (data) {
- DEBUG("pwrite data=%" PRIx64 ", size=%d, e_phys=" TARGET_FMT_plx
- ", addr="TARGET_FMT_plx"\n", *data, size, addr, addr);
- if (pwrite(fd, data, size, addr) != size) {
- error_report("%s - pwrite failed %s", __func__, strerror(errno));
- }
- } else {
- if (pread(fd, &val, size, addr) != size) {
- error_report("%s - pread failed %s", __func__, strerror(errno));
- val = (1UL << (size * 8)) - 1;
- }
- DEBUG("pread val=%" PRIx64 ", size=%d, e_phys=" TARGET_FMT_plx
- ", addr=" TARGET_FMT_plx "\n", val, size, addr, addr);
- }
- return val;
-}
-
-static void assigned_dev_ioport_write(void *opaque, hwaddr addr,
- uint64_t data, unsigned size)
-{
- assigned_dev_ioport_rw(opaque, addr, size, &data);
-}
-
-static uint64_t assigned_dev_ioport_read(void *opaque,
- hwaddr addr, unsigned size)
-{
- return assigned_dev_ioport_rw(opaque, addr, size, NULL);
-}
-
-static uint32_t slow_bar_readb(void *opaque, hwaddr addr)
-{
- AssignedDevRegion *d = opaque;
- uint8_t *in = d->u.r_virtbase + addr;
- uint32_t r;
-
- r = *in;
- DEBUG("addr=0x" TARGET_FMT_plx " val=0x%08x\n", addr, r);
-
- return r;
-}
-
-static uint32_t slow_bar_readw(void *opaque, hwaddr addr)
-{
- AssignedDevRegion *d = opaque;
- uint16_t *in = (uint16_t *)(d->u.r_virtbase + addr);
- uint32_t r;
-
- r = *in;
- DEBUG("addr=0x" TARGET_FMT_plx " val=0x%08x\n", addr, r);
-
- return r;
-}
-
-static uint32_t slow_bar_readl(void *opaque, hwaddr addr)
-{
- AssignedDevRegion *d = opaque;
- uint32_t *in = (uint32_t *)(d->u.r_virtbase + addr);
- uint32_t r;
-
- r = *in;
- DEBUG("addr=0x" TARGET_FMT_plx " val=0x%08x\n", addr, r);
-
- return r;
-}
-
-static void slow_bar_writeb(void *opaque, hwaddr addr, uint32_t val)
-{
- AssignedDevRegion *d = opaque;
- uint8_t *out = d->u.r_virtbase + addr;
-
- DEBUG("addr=0x" TARGET_FMT_plx " val=0x%02x\n", addr, val);
- *out = val;
-}
-
-static void slow_bar_writew(void *opaque, hwaddr addr, uint32_t val)
-{
- AssignedDevRegion *d = opaque;
- uint16_t *out = (uint16_t *)(d->u.r_virtbase + addr);
-
- DEBUG("addr=0x" TARGET_FMT_plx " val=0x%04x\n", addr, val);
- *out = val;
-}
-
-static void slow_bar_writel(void *opaque, hwaddr addr, uint32_t val)
-{
- AssignedDevRegion *d = opaque;
- uint32_t *out = (uint32_t *)(d->u.r_virtbase + addr);
-
- DEBUG("addr=0x" TARGET_FMT_plx " val=0x%08x\n", addr, val);
- *out = val;
-}
-
-static const MemoryRegionOps slow_bar_ops = {
- .old_mmio = {
- .read = { slow_bar_readb, slow_bar_readw, slow_bar_readl, },
- .write = { slow_bar_writeb, slow_bar_writew, slow_bar_writel, },
- },
- .endianness = DEVICE_NATIVE_ENDIAN,
-};
-
-static void assigned_dev_iomem_setup(PCIDevice *pci_dev, int region_num,
- pcibus_t e_size)
-{
- AssignedDevice *r_dev = PCI_ASSIGN(pci_dev);
- AssignedDevRegion *region = &r_dev->v_addrs[region_num];
- PCIRegion *real_region = &r_dev->real_device.regions[region_num];
-
- if (e_size > 0) {
- memory_region_init(®ion->container, OBJECT(pci_dev),
- "assigned-dev-container", e_size);
- memory_region_add_subregion(®ion->container, 0,
®ion->real_iomem);
-
- /* deal with MSI-X MMIO page */
- if (real_region->base_addr <= r_dev->msix_table_addr &&
- real_region->base_addr + real_region->size >
- r_dev->msix_table_addr) {
- uint64_t offset = r_dev->msix_table_addr - real_region->base_addr;
-
- memory_region_add_subregion_overlap(®ion->container,
- offset,
- &r_dev->mmio,
- 1);
- }
- }
-}
-
-static const MemoryRegionOps assigned_dev_ioport_ops = {
- .read = assigned_dev_ioport_read,
- .write = assigned_dev_ioport_write,
- .endianness = DEVICE_NATIVE_ENDIAN,
-};
-
-static void assigned_dev_ioport_setup(PCIDevice *pci_dev, int region_num,
- pcibus_t size)
-{
- AssignedDevice *r_dev = PCI_ASSIGN(pci_dev);
- AssignedDevRegion *region = &r_dev->v_addrs[region_num];
-
- region->e_size = size;
- memory_region_init(®ion->container, OBJECT(pci_dev),
- "assigned-dev-container", size);
- memory_region_init_io(®ion->real_iomem, OBJECT(pci_dev),
- &assigned_dev_ioport_ops, r_dev->v_addrs +
region_num,
- "assigned-dev-iomem", size);
- memory_region_add_subregion(®ion->container, 0, ®ion->real_iomem);
-}
-
-static uint32_t assigned_dev_pci_read(PCIDevice *d, int pos, int len)
-{
- AssignedDevice *pci_dev = PCI_ASSIGN(d);
- uint32_t val;
- ssize_t ret;
- int fd = pci_dev->real_device.config_fd;
-
-again:
- ret = pread(fd, &val, len, pos);
- if (ret != len) {
- if ((ret < 0) && (errno == EINTR || errno == EAGAIN)) {
- goto again;
- }
-
- hw_error("pci read failed, ret = %zd errno = %d\n", ret, errno);
- }
-
- return val;
-}
-
-static uint8_t assigned_dev_pci_read_byte(PCIDevice *d, int pos)
-{
- return (uint8_t)assigned_dev_pci_read(d, pos, 1);
-}
-
-static void assigned_dev_pci_write(PCIDevice *d, int pos, uint32_t val, int
len)
-{
- AssignedDevice *pci_dev = PCI_ASSIGN(d);
- ssize_t ret;
- int fd = pci_dev->real_device.config_fd;
-
-again:
- ret = pwrite(fd, &val, len, pos);
- if (ret != len) {
- if ((ret < 0) && (errno == EINTR || errno == EAGAIN)) {
- goto again;
- }
-
- hw_error("pci write failed, ret = %zd errno = %d\n", ret, errno);
- }
-}
-
-static void assigned_dev_emulate_config_read(AssignedDevice *dev,
- uint32_t offset, uint32_t len)
-{
- memset(dev->emulate_config_read + offset, 0xff, len);
-}
-
-static void assigned_dev_direct_config_read(AssignedDevice *dev,
- uint32_t offset, uint32_t len)
-{
- memset(dev->emulate_config_read + offset, 0, len);
-}
-
-static void assigned_dev_direct_config_write(AssignedDevice *dev,
- uint32_t offset, uint32_t len)
-{
- memset(dev->emulate_config_write + offset, 0, len);
-}
-
-static uint8_t pci_find_cap_offset(PCIDevice *d, uint8_t cap, uint8_t start)
-{
- int id;
- int max_cap = 48;
- int pos = start ? start : PCI_CAPABILITY_LIST;
- int status;
-
- status = assigned_dev_pci_read_byte(d, PCI_STATUS);
- if ((status & PCI_STATUS_CAP_LIST) == 0) {
- return 0;
- }
-
- while (max_cap--) {
- pos = assigned_dev_pci_read_byte(d, pos);
- if (pos < 0x40) {
- break;
- }
-
- pos &= ~3;
- id = assigned_dev_pci_read_byte(d, pos + PCI_CAP_LIST_ID);
-
- if (id == 0xff) {
- break;
- }
- if (id == cap) {
- return pos;
- }
-
- pos += PCI_CAP_LIST_NEXT;
- }
- return 0;
-}
-
-static void assigned_dev_register_regions(PCIRegion *io_regions,
- unsigned long regions_num,
- AssignedDevice *pci_dev,
- Error **errp)
-{
- uint32_t i;
- PCIRegion *cur_region = io_regions;
-
- for (i = 0; i < regions_num; i++, cur_region++) {
- if (!cur_region->valid) {
- continue;
- }
-
- /* handle memory io regions */
- if (cur_region->type & IORESOURCE_MEM) {
- int t = PCI_BASE_ADDRESS_SPACE_MEMORY;
- if (cur_region->type & IORESOURCE_PREFETCH) {
- t |= PCI_BASE_ADDRESS_MEM_PREFETCH;
- }
- if (cur_region->type & IORESOURCE_MEM_64) {
- t |= PCI_BASE_ADDRESS_MEM_TYPE_64;
- }
-
- /* map physical memory */
- pci_dev->v_addrs[i].u.r_virtbase = mmap(NULL, cur_region->size,
- PROT_WRITE | PROT_READ,
- MAP_SHARED,
- cur_region->resource_fd,
- (off_t)0);
-
- if (pci_dev->v_addrs[i].u.r_virtbase == MAP_FAILED) {
- pci_dev->v_addrs[i].u.r_virtbase = NULL;
- error_setg_errno(errp, errno, "Couldn't mmap 0x%" PRIx64 "!",
- cur_region->base_addr);
- return;
- }
-
- pci_dev->v_addrs[i].r_size = cur_region->size;
- pci_dev->v_addrs[i].e_size = 0;
-
- /* add offset */
- pci_dev->v_addrs[i].u.r_virtbase +=
- (cur_region->base_addr & 0xFFF);
-
- if (cur_region->size & 0xFFF) {
- error_report("PCI region %d at address 0x%" PRIx64 " has "
- "size 0x%" PRIx64 ", which is not a multiple of "
- "4K. You might experience some performance hit "
- "due to that.",
- i, cur_region->base_addr, cur_region->size);
- memory_region_init_io(&pci_dev->v_addrs[i].real_iomem,
- OBJECT(pci_dev), &slow_bar_ops,
- &pci_dev->v_addrs[i],
- "assigned-dev-slow-bar",
- cur_region->size);
- } else {
- void *virtbase = pci_dev->v_addrs[i].u.r_virtbase;
- char name[32];
- snprintf(name, sizeof(name), "%s.bar%d",
- object_get_typename(OBJECT(pci_dev)), i);
- memory_region_init_ram_ptr(&pci_dev->v_addrs[i].real_iomem,
- OBJECT(pci_dev), name,
- cur_region->size, virtbase);
- vmstate_register_ram(&pci_dev->v_addrs[i].real_iomem,
- &pci_dev->dev.qdev);
- }
-
- assigned_dev_iomem_setup(&pci_dev->dev, i, cur_region->size);
- pci_register_bar((PCIDevice *) pci_dev, i, t,
- &pci_dev->v_addrs[i].container);
- continue;
- } else {
- /* handle port io regions */
- uint32_t val;
- int ret;
-
- /* Test kernel support for ioport resource read/write. Old
- * kernels return EIO. New kernels only allow 1/2/4 byte reads
- * so should return EINVAL for a 3 byte read */
- ret = pread(pci_dev->v_addrs[i].region->resource_fd, &val, 3, 0);
- if (ret >= 0) {
- error_report("Unexpected return from I/O port read: %d", ret);
- abort();
- } else if (errno != EINVAL) {
- error_report("Kernel doesn't support ioport resource "
- "access, hiding this region.");
- close(pci_dev->v_addrs[i].region->resource_fd);
- cur_region->valid = 0;
- continue;
- }
-
- pci_dev->v_addrs[i].u.r_baseport = cur_region->base_addr;
- pci_dev->v_addrs[i].r_size = cur_region->size;
- pci_dev->v_addrs[i].e_size = 0;
-
- assigned_dev_ioport_setup(&pci_dev->dev, i, cur_region->size);
- pci_register_bar((PCIDevice *) pci_dev, i,
- PCI_BASE_ADDRESS_SPACE_IO,
- &pci_dev->v_addrs[i].container);
- }
- }
-
- /* success */
-}
-
-static void get_real_id(const char *devpath, const char *idname, uint16_t *val,
- Error **errp)
-{
- FILE *f;
- char name[128];
- long id;
-
- snprintf(name, sizeof(name), "%s%s", devpath, idname);
- f = fopen(name, "r");
- if (f == NULL) {
- error_setg_file_open(errp, errno, name);
- return;
- }
- if (fscanf(f, "%li\n", &id) == 1) {
- *val = id;
- } else {
- error_setg(errp, "Failed to parse contents of '%s'", name);
- }
- fclose(f);
-}
-
-static void get_real_vendor_id(const char *devpath, uint16_t *val,
- Error **errp)
-{
- get_real_id(devpath, "vendor", val, errp);
-}
-
-static void get_real_device_id(const char *devpath, uint16_t *val,
- Error **errp)
-{
- get_real_id(devpath, "device", val, errp);
-}
-
-static void get_real_device(AssignedDevice *pci_dev, Error **errp)
-{
- char dir[128], name[128];
- int fd, r = 0;
- FILE *f;
- uint64_t start, end, size, flags;
- uint16_t id;
- PCIRegion *rp;
- PCIDevRegions *dev = &pci_dev->real_device;
- Error *local_err = NULL;
-
- dev->region_number = 0;
-
- snprintf(dir, sizeof(dir), "/sys/bus/pci/devices/%04x:%02x:%02x.%x/",
- pci_dev->host.domain, pci_dev->host.bus,
- pci_dev->host.slot, pci_dev->host.function);
-
- snprintf(name, sizeof(name), "%sconfig", dir);
-
- if (pci_dev->configfd_name && *pci_dev->configfd_name) {
- dev->config_fd = monitor_fd_param(cur_mon, pci_dev->configfd_name,
- &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
- return;
- }
- } else {
- dev->config_fd = open(name, O_RDWR);
-
- if (dev->config_fd == -1) {
- error_setg_file_open(errp, errno, name);
- return;
- }
- }
-again:
- r = read(dev->config_fd, pci_dev->dev.config,
- pci_config_size(&pci_dev->dev));
- if (r < 0) {
- if (errno == EINTR || errno == EAGAIN) {
- goto again;
- }
- error_setg_errno(errp, errno, "read(\"%s\")",
- (pci_dev->configfd_name && *pci_dev->configfd_name) ?
- pci_dev->configfd_name : name);
- return;
- }
-
- /* Restore or clear multifunction, this is always controlled by qemu */
- if (pci_dev->dev.cap_present & QEMU_PCI_CAP_MULTIFUNCTION) {
- pci_dev->dev.config[PCI_HEADER_TYPE] |= PCI_HEADER_TYPE_MULTI_FUNCTION;
- } else {
- pci_dev->dev.config[PCI_HEADER_TYPE] &=
~PCI_HEADER_TYPE_MULTI_FUNCTION;
- }
-
- /* Clear host resource mapping info. If we choose not to register a
- * BAR, such as might be the case with the option ROM, we can get
- * confusing, unwritable, residual addresses from the host here. */
- memset(&pci_dev->dev.config[PCI_BASE_ADDRESS_0], 0, 24);
- memset(&pci_dev->dev.config[PCI_ROM_ADDRESS], 0, 4);
-
- snprintf(name, sizeof(name), "%sresource", dir);
-
- f = fopen(name, "r");
- if (f == NULL) {
- error_setg_file_open(errp, errno, name);
- return;
- }
-
- for (r = 0; r < PCI_ROM_SLOT; r++) {
- if (fscanf(f, "%" SCNi64 " %" SCNi64 " %" SCNi64 "\n",
- &start, &end, &flags) != 3) {
- break;
- }
-
- rp = dev->regions + r;
- rp->valid = 0;
- rp->resource_fd = -1;
- size = end - start + 1;
- flags &= IORESOURCE_IO | IORESOURCE_MEM | IORESOURCE_PREFETCH
- | IORESOURCE_MEM_64;
- if (size == 0 || (flags & ~IORESOURCE_PREFETCH) == 0) {
- continue;
- }
- if (flags & IORESOURCE_MEM) {
- flags &= ~IORESOURCE_IO;
- } else {
- flags &= ~IORESOURCE_PREFETCH;
- }
- snprintf(name, sizeof(name), "%sresource%d", dir, r);
- fd = open(name, O_RDWR);
- if (fd == -1) {
- continue;
- }
- rp->resource_fd = fd;
-
- rp->type = flags;
- rp->valid = 1;
- rp->base_addr = start;
- rp->size = size;
- pci_dev->v_addrs[r].region = rp;
- DEBUG("region %d size %" PRIu64 " start 0x%" PRIx64
- " type %d resource_fd %d\n",
- r, rp->size, start, rp->type, rp->resource_fd);
- }
-
- fclose(f);
-
- /* read and fill vendor ID */
- get_real_vendor_id(dir, &id, &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
- return;
- }
- pci_dev->dev.config[0] = id & 0xff;
- pci_dev->dev.config[1] = (id & 0xff00) >> 8;
-
- /* read and fill device ID */
- get_real_device_id(dir, &id, &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
- return;
- }
- pci_dev->dev.config[2] = id & 0xff;
- pci_dev->dev.config[3] = (id & 0xff00) >> 8;
-
- pci_word_test_and_clear_mask(pci_dev->emulate_config_write + PCI_COMMAND,
- PCI_COMMAND_MASTER |
PCI_COMMAND_INTX_DISABLE);
-
- dev->region_number = r;
-}
-
-static void free_msi_virqs(AssignedDevice *dev)
-{
- int i;
-
- for (i = 0; i < dev->msi_virq_nr; i++) {
- if (dev->msi_virq[i] >= 0) {
- kvm_irqchip_release_virq(kvm_state, dev->msi_virq[i]);
- dev->msi_virq[i] = -1;
- }
- }
- g_free(dev->msi_virq);
- dev->msi_virq = NULL;
- dev->msi_virq_nr = 0;
-}
-
-static void free_assigned_device(AssignedDevice *dev)
-{
- int i;
-
- if (dev->cap.available & ASSIGNED_DEVICE_CAP_MSIX) {
- assigned_dev_unregister_msix_mmio(dev);
- }
- for (i = 0; i < dev->real_device.region_number; i++) {
- PCIRegion *pci_region = &dev->real_device.regions[i];
- AssignedDevRegion *region = &dev->v_addrs[i];
-
- if (!pci_region->valid) {
- continue;
- }
- if (pci_region->type & IORESOURCE_IO) {
- if (region->u.r_baseport) {
- memory_region_del_subregion(®ion->container,
- ®ion->real_iomem);
- }
- } else if (pci_region->type & IORESOURCE_MEM) {
- if (region->u.r_virtbase) {
- memory_region_del_subregion(®ion->container,
- ®ion->real_iomem);
-
- /* Remove MSI-X table subregion */
- if (pci_region->base_addr <= dev->msix_table_addr &&
- pci_region->base_addr + pci_region->size >
- dev->msix_table_addr) {
- memory_region_del_subregion(®ion->container,
- &dev->mmio);
- }
- if (munmap(region->u.r_virtbase,
- (pci_region->size + 0xFFF) & 0xFFFFF000)) {
- error_report("Failed to unmap assigned device region: %s",
- strerror(errno));
- }
- }
- }
- if (pci_region->resource_fd >= 0) {
- close(pci_region->resource_fd);
- }
- }
-
- if (dev->real_device.config_fd >= 0) {
- close(dev->real_device.config_fd);
- }
-
- free_msi_virqs(dev);
-}
-
-/* This function tries to determine the cause of the PCI assignment failure. It
- * always returns the cause as a dynamically allocated, human readable string.
- * If the function fails to determine the cause for any internal reason, then
- * the returned string will state that fact.
- */
-static char *assign_failed_examine(const AssignedDevice *dev)
-{
- char name[PATH_MAX], dir[PATH_MAX], driver[PATH_MAX] = {}, *ns;
- uint16_t vendor_id, device_id;
- int r;
- Error *local_err = NULL;
-
- snprintf(dir, sizeof(dir), "/sys/bus/pci/devices/%04x:%02x:%02x.%01x/",
- dev->host.domain, dev->host.bus, dev->host.slot,
- dev->host.function);
-
- snprintf(name, sizeof(name), "%sdriver", dir);
-
- r = readlink(name, driver, sizeof(driver));
- if ((r <= 0) || r >= sizeof(driver)) {
- goto fail;
- }
-
- driver[r] = 0;
- ns = strrchr(driver, '/');
- if (!ns) {
- goto fail;
- }
-
- ns++;
-
- if ((get_real_vendor_id(dir, &vendor_id, &local_err), local_err) ||
- (get_real_device_id(dir, &device_id, &local_err), local_err)) {
- /* We're already analyzing an assignment error, so we suppress this
- * one just like the others above.
- */
- error_free(local_err);
- goto fail;
- }
-
- return g_strdup_printf(
- "*** The driver '%s' is occupying your device %04x:%02x:%02x.%x.\n"
- "***\n"
- "*** You can try the following commands to free it:\n"
- "***\n"
- "*** $ echo \"%04x %04x\" > /sys/bus/pci/drivers/pci-stub/new_id\n"
- "*** $ echo \"%04x:%02x:%02x.%x\" > /sys/bus/pci/drivers/%s/unbind\n"
- "*** $ echo \"%04x:%02x:%02x.%x\" > /sys/bus/pci/drivers/"
- "pci-stub/bind\n"
- "*** $ echo \"%04x %04x\" > /sys/bus/pci/drivers/pci-stub/remove_id\n"
- "***\n",
- ns, dev->host.domain, dev->host.bus, dev->host.slot,
- dev->host.function, vendor_id, device_id,
- dev->host.domain, dev->host.bus, dev->host.slot, dev->host.function,
- ns, dev->host.domain, dev->host.bus, dev->host.slot,
- dev->host.function, vendor_id, device_id);
-
-fail:
- return g_strdup("Couldn't find out why.\n");
-}
-
-static void assign_device(AssignedDevice *dev, Error **errp)
-{
- uint32_t flags = KVM_DEV_ASSIGN_ENABLE_IOMMU;
- int r;
-
- /* Only pass non-zero PCI segment to capable module */
- if (!kvm_check_extension(kvm_state, KVM_CAP_PCI_SEGMENT) &&
- dev->host.domain) {
- error_setg(errp, "Can't assign device inside non-zero PCI segment "
- "as this KVM module doesn't support it.");
- return;
- }
-
- if (!kvm_check_extension(kvm_state, KVM_CAP_IOMMU)) {
- error_setg(errp, "No IOMMU found. Unable to assign device \"%s\"",
- dev->dev.qdev.id);
- return;
- }
-
- if (dev->features & ASSIGNED_DEVICE_SHARE_INTX_MASK &&
- kvm_has_intx_set_mask()) {
- flags |= KVM_DEV_ASSIGN_PCI_2_3;
- }
-
- r = kvm_device_pci_assign(kvm_state, &dev->host, flags, &dev->dev_id);
- if (r < 0) {
- switch (r) {
- case -EBUSY: {
- char *cause;
-
- cause = assign_failed_examine(dev);
- error_setg_errno(errp, -r, "Failed to assign device \"%s\"",
- dev->dev.qdev.id);
- error_append_hint(errp, "%s", cause);
- g_free(cause);
- break;
- }
- default:
- error_setg_errno(errp, -r, "Failed to assign device \"%s\"",
- dev->dev.qdev.id);
- break;
- }
- }
-}
-
-static int verify_irqchip_in_kernel(Error **errp)
-{
- if (kvm_irqchip_in_kernel()) {
- return -1;
- }
- error_setg(errp, "pci-assign requires KVM with in-kernel irqchip enabled");
- return 0;
-}
-
-static int assign_intx(AssignedDevice *dev, Error **errp)
-{
- AssignedIRQType new_type;
- PCIINTxRoute intx_route;
- bool intx_host_msi;
- int r;
-
- /* Interrupt PIN 0 means don't use INTx */
- if (assigned_dev_pci_read_byte(&dev->dev, PCI_INTERRUPT_PIN) == 0) {
- pci_device_set_intx_routing_notifier(&dev->dev, NULL);
- return 0;
- }
-
- if (verify_irqchip_in_kernel(errp) < 0) {
- return -ENOTSUP;
- }
-
- pci_device_set_intx_routing_notifier(&dev->dev,
- assigned_dev_update_irq_routing);
-
- intx_route = pci_device_route_intx_to_irq(&dev->dev, dev->intpin);
- assert(intx_route.mode != PCI_INTX_INVERTED);
-
- if (!pci_intx_route_changed(&dev->intx_route, &intx_route)) {
- return 0;
- }
-
- switch (dev->assigned_irq_type) {
- case ASSIGNED_IRQ_INTX_HOST_INTX:
- case ASSIGNED_IRQ_INTX_HOST_MSI:
- intx_host_msi = dev->assigned_irq_type == ASSIGNED_IRQ_INTX_HOST_MSI;
- r = kvm_device_intx_deassign(kvm_state, dev->dev_id, intx_host_msi);
- break;
- case ASSIGNED_IRQ_MSI:
- r = kvm_device_msi_deassign(kvm_state, dev->dev_id);
- break;
- case ASSIGNED_IRQ_MSIX:
- r = kvm_device_msix_deassign(kvm_state, dev->dev_id);
- break;
- default:
- r = 0;
- break;
- }
- if (r) {
- perror("assign_intx: deassignment of previous interrupt failed");
- }
- dev->assigned_irq_type = ASSIGNED_IRQ_NONE;
-
- if (intx_route.mode == PCI_INTX_DISABLED) {
- dev->intx_route = intx_route;
- return 0;
- }
-
-retry:
- if (dev->features & ASSIGNED_DEVICE_PREFER_MSI_MASK &&
- dev->cap.available & ASSIGNED_DEVICE_CAP_MSI) {
- intx_host_msi = true;
- new_type = ASSIGNED_IRQ_INTX_HOST_MSI;
- } else {
- intx_host_msi = false;
- new_type = ASSIGNED_IRQ_INTX_HOST_INTX;
- }
-
- r = kvm_device_intx_assign(kvm_state, dev->dev_id, intx_host_msi,
- intx_route.irq);
- if (r < 0) {
- if (r == -EIO && !(dev->features & ASSIGNED_DEVICE_PREFER_MSI_MASK) &&
- dev->cap.available & ASSIGNED_DEVICE_CAP_MSI) {
- /* Retry with host-side MSI. There might be an IRQ conflict and
- * either the kernel or the device doesn't support sharing. */
- error_report("Host-side INTx sharing not supported, "
- "using MSI instead");
- error_printf("Some devices do not work properly in this mode.\n");
- dev->features |= ASSIGNED_DEVICE_PREFER_MSI_MASK;
- goto retry;
- }
- error_setg_errno(errp, -r, "Failed to assign irq for \"%s\"",
- dev->dev.qdev.id);
- error_append_hint(errp, "Perhaps you are assigning a device "
- "that shares an IRQ with another device?\n");
- return r;
- }
-
- dev->intx_route = intx_route;
- dev->assigned_irq_type = new_type;
- return r;
-}
-
-static void deassign_device(AssignedDevice *dev)
-{
- int r;
-
- r = kvm_device_pci_deassign(kvm_state, dev->dev_id);
- assert(r == 0);
-}
-
-/* The pci config space got updated. Check if irq numbers have changed
- * for our devices
- */
-static void assigned_dev_update_irq_routing(PCIDevice *dev)
-{
- AssignedDevice *assigned_dev = PCI_ASSIGN(dev);
- Error *err = NULL;
- int r;
-
- r = assign_intx(assigned_dev, &err);
- if (r < 0) {
- error_report_err(err);
- err = NULL;
- qdev_unplug(&dev->qdev, &err);
- assert(!err);
- }
-}
-
-static void assigned_dev_update_msi(PCIDevice *pci_dev)
-{
- AssignedDevice *assigned_dev = PCI_ASSIGN(pci_dev);
- uint8_t ctrl_byte = pci_get_byte(pci_dev->config + pci_dev->msi_cap +
- PCI_MSI_FLAGS);
- int r;
-
- /* Some guests gratuitously disable MSI even if they're not using it,
- * try to catch this by only deassigning irqs if the guest is using
- * MSI or intends to start. */
- if (assigned_dev->assigned_irq_type == ASSIGNED_IRQ_MSI ||
- (ctrl_byte & PCI_MSI_FLAGS_ENABLE)) {
- r = kvm_device_msi_deassign(kvm_state, assigned_dev->dev_id);
- /* -ENXIO means no assigned irq */
- if (r && r != -ENXIO) {
- perror("assigned_dev_update_msi: deassign irq");
- }
-
- free_msi_virqs(assigned_dev);
-
- assigned_dev->assigned_irq_type = ASSIGNED_IRQ_NONE;
- pci_device_set_intx_routing_notifier(pci_dev, NULL);
- }
-
- if (ctrl_byte & PCI_MSI_FLAGS_ENABLE) {
- int virq;
-
- virq = kvm_irqchip_add_msi_route(kvm_state, 0, pci_dev);
- if (virq < 0) {
- perror("assigned_dev_update_msi: kvm_irqchip_add_msi_route");
- return;
- }
-
- assigned_dev->msi_virq = g_malloc(sizeof(*assigned_dev->msi_virq));
- assigned_dev->msi_virq_nr = 1;
- assigned_dev->msi_virq[0] = virq;
- if (kvm_device_msi_assign(kvm_state, assigned_dev->dev_id, virq) < 0) {
- perror("assigned_dev_update_msi: kvm_device_msi_assign");
- }
-
- assigned_dev->intx_route.mode = PCI_INTX_DISABLED;
- assigned_dev->intx_route.irq = -1;
- assigned_dev->assigned_irq_type = ASSIGNED_IRQ_MSI;
- } else {
- Error *local_err = NULL;
-
- assign_intx(assigned_dev, &local_err);
- if (local_err) {
- error_report_err(local_err);
- }
- }
-}
-
-static void assigned_dev_update_msi_msg(PCIDevice *pci_dev)
-{
- AssignedDevice *assigned_dev = PCI_ASSIGN(pci_dev);
- uint8_t ctrl_byte = pci_get_byte(pci_dev->config + pci_dev->msi_cap +
- PCI_MSI_FLAGS);
-
- if (assigned_dev->assigned_irq_type != ASSIGNED_IRQ_MSI ||
- !(ctrl_byte & PCI_MSI_FLAGS_ENABLE)) {
- return;
- }
-
- kvm_irqchip_update_msi_route(kvm_state, assigned_dev->msi_virq[0],
- msi_get_message(pci_dev, 0), pci_dev);
- kvm_irqchip_commit_routes(kvm_state);
-}
-
-static bool assigned_dev_msix_masked(MSIXTableEntry *entry)
-{
- return (entry->ctrl & cpu_to_le32(0x1)) != 0;
-}
-
-/*
- * When MSI-X is first enabled the vector table typically has all the
- * vectors masked, so we can't use that as the obvious test to figure out
- * how many vectors to initially enable. Instead we look at the data field
- * because this is what worked for pci-assign for a long time. This makes
- * sure the physical MSI-X state tracks the guest's view, which is important
- * for some VF/PF and PF/fw communication channels.
- */
-static bool assigned_dev_msix_skipped(MSIXTableEntry *entry)
-{
- return !entry->data;
-}
-
-static int assigned_dev_update_msix_mmio(PCIDevice *pci_dev)
-{
- AssignedDevice *adev = PCI_ASSIGN(pci_dev);
- uint16_t entries_nr = 0;
- int i, r = 0;
- MSIXTableEntry *entry = adev->msix_table;
-
- /* Get the usable entry number for allocating */
- for (i = 0; i < adev->msix_max; i++, entry++) {
- if (assigned_dev_msix_skipped(entry)) {
- continue;
- }
- entries_nr++;
- }
-
- DEBUG("MSI-X entries: %d\n", entries_nr);
-
- /* It's valid to enable MSI-X with all entries masked */
- if (!entries_nr) {
- return 0;
- }
-
- r = kvm_device_msix_init_vectors(kvm_state, adev->dev_id, entries_nr);
- if (r != 0) {
- error_report("fail to set MSI-X entry number for MSIX! %s",
- strerror(-r));
- return r;
- }
-
- free_msi_virqs(adev);
-
- adev->msi_virq_nr = adev->msix_max;
- adev->msi_virq = g_malloc(adev->msix_max * sizeof(*adev->msi_virq));
-
- entry = adev->msix_table;
- for (i = 0; i < adev->msix_max; i++, entry++) {
- adev->msi_virq[i] = -1;
-
- if (assigned_dev_msix_skipped(entry)) {
- continue;
- }
-
- r = kvm_irqchip_add_msi_route(kvm_state, i, pci_dev);
- if (r < 0) {
- return r;
- }
- adev->msi_virq[i] = r;
-
- DEBUG("MSI-X vector %d, gsi %d, addr %08x_%08x, data %08x\n", i,
- r, entry->addr_hi, entry->addr_lo, entry->data);
-
- r = kvm_device_msix_set_vector(kvm_state, adev->dev_id, i,
- adev->msi_virq[i]);
- if (r) {
- error_report("fail to set MSI-X entry! %s", strerror(-r));
- break;
- }
- }
-
- return r;
-}
-
-static void assigned_dev_update_msix(PCIDevice *pci_dev)
-{
- AssignedDevice *assigned_dev = PCI_ASSIGN(pci_dev);
- uint16_t ctrl_word = pci_get_word(pci_dev->config + pci_dev->msix_cap +
- PCI_MSIX_FLAGS);
- int r;
-
- /* Some guests gratuitously disable MSIX even if they're not using it,
- * try to catch this by only deassigning irqs if the guest is using
- * MSIX or intends to start. */
- if ((assigned_dev->assigned_irq_type == ASSIGNED_IRQ_MSIX) ||
- (ctrl_word & PCI_MSIX_FLAGS_ENABLE)) {
- r = kvm_device_msix_deassign(kvm_state, assigned_dev->dev_id);
- /* -ENXIO means no assigned irq */
- if (r && r != -ENXIO) {
- perror("assigned_dev_update_msix: deassign irq");
- }
-
- free_msi_virqs(assigned_dev);
-
- assigned_dev->assigned_irq_type = ASSIGNED_IRQ_NONE;
- pci_device_set_intx_routing_notifier(pci_dev, NULL);
- }
-
- if (ctrl_word & PCI_MSIX_FLAGS_ENABLE) {
- if (assigned_dev_update_msix_mmio(pci_dev) < 0) {
- perror("assigned_dev_update_msix_mmio");
- return;
- }
-
- if (assigned_dev->msi_virq_nr > 0) {
- if (kvm_device_msix_assign(kvm_state, assigned_dev->dev_id) < 0) {
- perror("assigned_dev_enable_msix: assign irq");
- return;
- }
- }
- assigned_dev->intx_route.mode = PCI_INTX_DISABLED;
- assigned_dev->intx_route.irq = -1;
- assigned_dev->assigned_irq_type = ASSIGNED_IRQ_MSIX;
- } else {
- Error *local_err = NULL;
-
- assign_intx(assigned_dev, &local_err);
- if (local_err) {
- error_report_err(local_err);
- }
- }
-}
-
-static uint32_t assigned_dev_pci_read_config(PCIDevice *pci_dev,
- uint32_t address, int len)
-{
- AssignedDevice *assigned_dev = PCI_ASSIGN(pci_dev);
- uint32_t virt_val = pci_default_read_config(pci_dev, address, len);
- uint32_t real_val, emulate_mask, full_emulation_mask;
-
- emulate_mask = 0;
- memcpy(&emulate_mask, assigned_dev->emulate_config_read + address, len);
- emulate_mask = le32_to_cpu(emulate_mask);
-
- full_emulation_mask = 0xffffffff >> (32 - len * 8);
-
- if (emulate_mask != full_emulation_mask) {
- real_val = assigned_dev_pci_read(pci_dev, address, len);
- return (virt_val & emulate_mask) | (real_val & ~emulate_mask);
- } else {
- return virt_val;
- }
-}
-
-static void assigned_dev_pci_write_config(PCIDevice *pci_dev, uint32_t address,
- uint32_t val, int len)
-{
- AssignedDevice *assigned_dev = PCI_ASSIGN(pci_dev);
- uint16_t old_cmd = pci_get_word(pci_dev->config + PCI_COMMAND);
- uint32_t emulate_mask, full_emulation_mask;
- int ret;
-
- pci_default_write_config(pci_dev, address, val, len);
-
- if (kvm_has_intx_set_mask() &&
- range_covers_byte(address, len, PCI_COMMAND + 1)) {
- bool intx_masked = (pci_get_word(pci_dev->config + PCI_COMMAND) &
- PCI_COMMAND_INTX_DISABLE);
-
- if (intx_masked != !!(old_cmd & PCI_COMMAND_INTX_DISABLE)) {
- ret = kvm_device_intx_set_mask(kvm_state, assigned_dev->dev_id,
- intx_masked);
- if (ret) {
- perror("assigned_dev_pci_write_config: set intx mask");
- }
- }
- }
- if (assigned_dev->cap.available & ASSIGNED_DEVICE_CAP_MSI) {
- if (range_covers_byte(address, len,
- pci_dev->msi_cap + PCI_MSI_FLAGS)) {
- assigned_dev_update_msi(pci_dev);
- } else if (ranges_overlap(address, len, /* 32bit MSI only */
- pci_dev->msi_cap + PCI_MSI_ADDRESS_LO, 6)) {
- assigned_dev_update_msi_msg(pci_dev);
- }
- }
- if (assigned_dev->cap.available & ASSIGNED_DEVICE_CAP_MSIX) {
- if (range_covers_byte(address, len,
- pci_dev->msix_cap + PCI_MSIX_FLAGS + 1)) {
- assigned_dev_update_msix(pci_dev);
- }
- }
-
- emulate_mask = 0;
- memcpy(&emulate_mask, assigned_dev->emulate_config_write + address, len);
- emulate_mask = le32_to_cpu(emulate_mask);
-
- full_emulation_mask = 0xffffffff >> (32 - len * 8);
-
- if (emulate_mask != full_emulation_mask) {
- if (emulate_mask) {
- val &= ~emulate_mask;
- val |= assigned_dev_pci_read(pci_dev, address, len) & emulate_mask;
- }
- assigned_dev_pci_write(pci_dev, address, val, len);
- }
-}
-
-static void assigned_dev_setup_cap_read(AssignedDevice *dev, uint32_t offset,
- uint32_t len)
-{
- assigned_dev_direct_config_read(dev, offset, len);
- assigned_dev_emulate_config_read(dev, offset + PCI_CAP_LIST_NEXT, 1);
-}
-
-static int assigned_device_pci_cap_init(PCIDevice *pci_dev, Error **errp)
-{
- AssignedDevice *dev = PCI_ASSIGN(pci_dev);
- PCIRegion *pci_region = dev->real_device.regions;
- int ret, pos;
-
- /* Clear initial capabilities pointer and status copied from hw */
- pci_set_byte(pci_dev->config + PCI_CAPABILITY_LIST, 0);
- pci_set_word(pci_dev->config + PCI_STATUS,
- pci_get_word(pci_dev->config + PCI_STATUS) &
- ~PCI_STATUS_CAP_LIST);
-
- /* Expose MSI capability
- * MSI capability is the 1st capability in capability config */
- pos = pci_find_cap_offset(pci_dev, PCI_CAP_ID_MSI, 0);
- if (pos != 0 && kvm_check_extension(kvm_state, KVM_CAP_ASSIGN_DEV_IRQ)) {
- if (verify_irqchip_in_kernel(errp) < 0) {
- return -ENOTSUP;
- }
- dev->dev.cap_present |= QEMU_PCI_CAP_MSI;
- dev->cap.available |= ASSIGNED_DEVICE_CAP_MSI;
- /* Only 32-bit/no-mask currently supported */
- ret = pci_add_capability(pci_dev, PCI_CAP_ID_MSI, pos, 10,
- errp);
- if (ret < 0) {
- return ret;
- }
- pci_dev->msi_cap = pos;
-
- pci_set_word(pci_dev->config + pos + PCI_MSI_FLAGS,
- pci_get_word(pci_dev->config + pos + PCI_MSI_FLAGS) &
- PCI_MSI_FLAGS_QMASK);
- pci_set_long(pci_dev->config + pos + PCI_MSI_ADDRESS_LO, 0);
- pci_set_word(pci_dev->config + pos + PCI_MSI_DATA_32, 0);
-
- /* Set writable fields */
- pci_set_word(pci_dev->wmask + pos + PCI_MSI_FLAGS,
- PCI_MSI_FLAGS_QSIZE | PCI_MSI_FLAGS_ENABLE);
- pci_set_long(pci_dev->wmask + pos + PCI_MSI_ADDRESS_LO, 0xfffffffc);
- pci_set_word(pci_dev->wmask + pos + PCI_MSI_DATA_32, 0xffff);
- }
- /* Expose MSI-X capability */
- pos = pci_find_cap_offset(pci_dev, PCI_CAP_ID_MSIX, 0);
- if (pos != 0 && kvm_device_msix_supported(kvm_state)) {
- int bar_nr;
- uint32_t msix_table_entry;
- uint16_t msix_max;
-
- if (verify_irqchip_in_kernel(errp) < 0) {
- return -ENOTSUP;
- }
- dev->dev.cap_present |= QEMU_PCI_CAP_MSIX;
- dev->cap.available |= ASSIGNED_DEVICE_CAP_MSIX;
- ret = pci_add_capability(pci_dev, PCI_CAP_ID_MSIX, pos, 12,
- errp);
- if (ret < 0) {
- return ret;
- }
- pci_dev->msix_cap = pos;
-
- msix_max = (pci_get_word(pci_dev->config + pos + PCI_MSIX_FLAGS) &
- PCI_MSIX_FLAGS_QSIZE) + 1;
- msix_max = MIN(msix_max, KVM_MAX_MSIX_PER_DEV);
- pci_set_word(pci_dev->config + pos + PCI_MSIX_FLAGS, msix_max - 1);
-
- /* Only enable and function mask bits are writable */
- pci_set_word(pci_dev->wmask + pos + PCI_MSIX_FLAGS,
- PCI_MSIX_FLAGS_ENABLE | PCI_MSIX_FLAGS_MASKALL);
-
- msix_table_entry = pci_get_long(pci_dev->config + pos +
PCI_MSIX_TABLE);
- bar_nr = msix_table_entry & PCI_MSIX_FLAGS_BIRMASK;
- msix_table_entry &= ~PCI_MSIX_FLAGS_BIRMASK;
- dev->msix_table_addr = pci_region[bar_nr].base_addr + msix_table_entry;
- dev->msix_table_size = msix_max * sizeof(MSIXTableEntry);
- dev->msix_max = msix_max;
- }
-
- /* Minimal PM support, nothing writable, device appears to NAK changes */
- pos = pci_find_cap_offset(pci_dev, PCI_CAP_ID_PM, 0);
- if (pos) {
- uint16_t pmc;
-
- ret = pci_add_capability(pci_dev, PCI_CAP_ID_PM, pos, PCI_PM_SIZEOF,
- errp);
- if (ret < 0) {
- return ret;
- }
-
- assigned_dev_setup_cap_read(dev, pos, PCI_PM_SIZEOF);
-
- pmc = pci_get_word(pci_dev->config + pos + PCI_CAP_FLAGS);
- pmc &= (PCI_PM_CAP_VER_MASK | PCI_PM_CAP_DSI);
- pci_set_word(pci_dev->config + pos + PCI_CAP_FLAGS, pmc);
-
- /* assign_device will bring the device up to D0, so we don't need
- * to worry about doing that ourselves here. */
- pci_set_word(pci_dev->config + pos + PCI_PM_CTRL,
- PCI_PM_CTRL_NO_SOFT_RESET);
-
- pci_set_byte(pci_dev->config + pos + PCI_PM_PPB_EXTENSIONS, 0);
- pci_set_byte(pci_dev->config + pos + PCI_PM_DATA_REGISTER, 0);
- }
-
- pos = pci_find_cap_offset(pci_dev, PCI_CAP_ID_EXP, 0);
- if (pos) {
- uint8_t version, size = 0;
- uint16_t type, devctl, lnksta;
- uint32_t devcap, lnkcap;
-
- version = pci_get_byte(pci_dev->config + pos + PCI_EXP_FLAGS);
- version &= PCI_EXP_FLAGS_VERS;
- if (version == 1) {
- size = 0x14;
- } else if (version == 2) {
- /*
- * Check for non-std size, accept reduced size to 0x34,
- * which is what bcm5761 implemented, violating the
- * PCIe v3.0 spec that regs should exist and be read as 0,
- * not optionally provided and shorten the struct size.
- */
- size = MIN(0x3c, PCI_CONFIG_SPACE_SIZE - pos);
- if (size < 0x34) {
- error_setg(errp, "Invalid size PCIe cap-id 0x%x",
- PCI_CAP_ID_EXP);
- return -EINVAL;
- } else if (size != 0x3c) {
- warn_report("%s: PCIe cap-id 0x%x has "
- "non-standard size 0x%x; std size should be 0x3c",
- __func__, PCI_CAP_ID_EXP, size);
- }
- } else if (version == 0) {
- uint16_t vid, did;
- vid = pci_get_word(pci_dev->config + PCI_VENDOR_ID);
- did = pci_get_word(pci_dev->config + PCI_DEVICE_ID);
- if (vid == PCI_VENDOR_ID_INTEL && did == 0x10ed) {
- /*
- * quirk for Intel 82599 VF with invalid PCIe capability
- * version, should really be version 2 (same as PF)
- */
- size = 0x3c;
- }
- }
-
- if (size == 0) {
- error_setg(errp, "Unsupported PCI express capability version %d",
- version);
- return -EINVAL;
- }
-
- ret = pci_add_capability(pci_dev, PCI_CAP_ID_EXP, pos, size,
- errp);
- if (ret < 0) {
- return ret;
- }
-
- assigned_dev_setup_cap_read(dev, pos, size);
-
- type = pci_get_word(pci_dev->config + pos + PCI_EXP_FLAGS);
- type = (type & PCI_EXP_FLAGS_TYPE) >> 4;
- if (type != PCI_EXP_TYPE_ENDPOINT &&
- type != PCI_EXP_TYPE_LEG_END && type != PCI_EXP_TYPE_RC_END) {
- error_setg(errp, "Device assignment only supports endpoint "
- "assignment, device type %d", type);
- return -EINVAL;
- }
-
- /* capabilities, pass existing read-only copy
- * PCI_EXP_FLAGS_IRQ: updated by hardware, should be direct read */
-
- /* device capabilities: hide FLR */
- devcap = pci_get_long(pci_dev->config + pos + PCI_EXP_DEVCAP);
- devcap &= ~PCI_EXP_DEVCAP_FLR;
- pci_set_long(pci_dev->config + pos + PCI_EXP_DEVCAP, devcap);
-
- /* device control: clear all error reporting enable bits, leaving
- * only a few host values. Note, these are
- * all writable, but not passed to hw.
- */
- devctl = pci_get_word(pci_dev->config + pos + PCI_EXP_DEVCTL);
- devctl = (devctl & (PCI_EXP_DEVCTL_READRQ | PCI_EXP_DEVCTL_PAYLOAD)) |
- PCI_EXP_DEVCTL_RELAX_EN | PCI_EXP_DEVCTL_NOSNOOP_EN;
- pci_set_word(pci_dev->config + pos + PCI_EXP_DEVCTL, devctl);
- devctl = PCI_EXP_DEVCTL_BCR_FLR | PCI_EXP_DEVCTL_AUX_PME;
- pci_set_word(pci_dev->wmask + pos + PCI_EXP_DEVCTL, ~devctl);
-
- /* Clear device status */
- pci_set_word(pci_dev->config + pos + PCI_EXP_DEVSTA, 0);
-
- /* Link capabilities, expose links and latencues, clear reporting */
- lnkcap = pci_get_long(pci_dev->config + pos + PCI_EXP_LNKCAP);
- lnkcap &= (PCI_EXP_LNKCAP_SLS | PCI_EXP_LNKCAP_MLW |
- PCI_EXP_LNKCAP_ASPMS | PCI_EXP_LNKCAP_L0SEL |
- PCI_EXP_LNKCAP_L1EL);
- pci_set_long(pci_dev->config + pos + PCI_EXP_LNKCAP, lnkcap);
-
- /* Link control, pass existing read-only copy. Should be writable? */
-
- /* Link status, only expose current speed and width */
- lnksta = pci_get_word(pci_dev->config + pos + PCI_EXP_LNKSTA);
- lnksta &= (PCI_EXP_LNKSTA_CLS | PCI_EXP_LNKSTA_NLW);
- pci_set_word(pci_dev->config + pos + PCI_EXP_LNKSTA, lnksta);
-
- if (version >= 2) {
- /* Slot capabilities, control, status - not needed for endpoints */
- pci_set_long(pci_dev->config + pos + PCI_EXP_SLTCAP, 0);
- pci_set_word(pci_dev->config + pos + PCI_EXP_SLTCTL, 0);
- pci_set_word(pci_dev->config + pos + PCI_EXP_SLTSTA, 0);
-
- /* Root control, capabilities, status - not needed for endpoints */
- pci_set_word(pci_dev->config + pos + PCI_EXP_RTCTL, 0);
- pci_set_word(pci_dev->config + pos + PCI_EXP_RTCAP, 0);
- pci_set_long(pci_dev->config + pos + PCI_EXP_RTSTA, 0);
-
- /* Device capabilities/control 2, pass existing read-only copy */
- /* Link control 2, pass existing read-only copy */
- }
- }
-
- pos = pci_find_cap_offset(pci_dev, PCI_CAP_ID_PCIX, 0);
- if (pos) {
- uint16_t cmd;
- uint32_t status;
-
- /* Only expose the minimum, 8 byte capability */
- ret = pci_add_capability(pci_dev, PCI_CAP_ID_PCIX, pos, 8,
- errp);
- if (ret < 0) {
- return ret;
- }
-
- assigned_dev_setup_cap_read(dev, pos, 8);
-
- /* Command register, clear upper bits, including extended modes */
- cmd = pci_get_word(pci_dev->config + pos + PCI_X_CMD);
- cmd &= (PCI_X_CMD_DPERR_E | PCI_X_CMD_ERO | PCI_X_CMD_MAX_READ |
- PCI_X_CMD_MAX_SPLIT);
- pci_set_word(pci_dev->config + pos + PCI_X_CMD, cmd);
-
- /* Status register, update with emulated PCI bus location, clear
- * error bits, leave the rest. */
- status = pci_get_long(pci_dev->config + pos + PCI_X_STATUS);
- status &= ~(PCI_X_STATUS_BUS | PCI_X_STATUS_DEVFN);
- status |= pci_get_bdf(pci_dev);
- status &= ~(PCI_X_STATUS_SPL_DISC | PCI_X_STATUS_UNX_SPL |
- PCI_X_STATUS_SPL_ERR);
- pci_set_long(pci_dev->config + pos + PCI_X_STATUS, status);
- }
-
- pos = pci_find_cap_offset(pci_dev, PCI_CAP_ID_VPD, 0);
- if (pos) {
- /* Direct R/W passthrough */
- ret = pci_add_capability(pci_dev, PCI_CAP_ID_VPD, pos, 8,
- errp);
- if (ret < 0) {
- return ret;
- }
-
- assigned_dev_setup_cap_read(dev, pos, 8);
-
- /* direct write for cap content */
- assigned_dev_direct_config_write(dev, pos + 2, 6);
- }
-
- /* Devices can have multiple vendor capabilities, get them all */
- for (pos = 0; (pos = pci_find_cap_offset(pci_dev, PCI_CAP_ID_VNDR, pos));
- pos += PCI_CAP_LIST_NEXT) {
- uint8_t len = pci_get_byte(pci_dev->config + pos + PCI_CAP_FLAGS);
- /* Direct R/W passthrough */
- ret = pci_add_capability(pci_dev, PCI_CAP_ID_VNDR, pos, len,
- errp);
- if (ret < 0) {
- return ret;
- }
-
- assigned_dev_setup_cap_read(dev, pos, len);
-
- /* direct write for cap content */
- assigned_dev_direct_config_write(dev, pos + 2, len - 2);
- }
-
- /* If real and virtual capability list status bits differ, virtualize the
- * access. */
- if ((pci_get_word(pci_dev->config + PCI_STATUS) & PCI_STATUS_CAP_LIST) !=
- (assigned_dev_pci_read_byte(pci_dev, PCI_STATUS) &
- PCI_STATUS_CAP_LIST)) {
- dev->emulate_config_read[PCI_STATUS] |= PCI_STATUS_CAP_LIST;
- }
-
- return 0;
-}
-
-static uint64_t
-assigned_dev_msix_mmio_read(void *opaque, hwaddr addr,
- unsigned size)
-{
- AssignedDevice *adev = opaque;
- uint64_t val;
-
- memcpy(&val, (void *)((uint8_t *)adev->msix_table + addr), size);
-
- return val;
-}
-
-static void assigned_dev_msix_mmio_write(void *opaque, hwaddr addr,
- uint64_t val, unsigned size)
-{
- AssignedDevice *adev = opaque;
- PCIDevice *pdev = &adev->dev;
- uint16_t ctrl;
- MSIXTableEntry orig;
- int i = addr >> 4;
-
- if (i >= adev->msix_max) {
- return; /* Drop write */
- }
-
- ctrl = pci_get_word(pdev->config + pdev->msix_cap + PCI_MSIX_FLAGS);
-
- DEBUG("write to MSI-X table offset 0x%lx, val 0x%lx\n", addr, val);
-
- if (ctrl & PCI_MSIX_FLAGS_ENABLE) {
- orig = adev->msix_table[i];
- }
-
- memcpy((uint8_t *)adev->msix_table + addr, &val, size);
-
- if (ctrl & PCI_MSIX_FLAGS_ENABLE) {
- MSIXTableEntry *entry = &adev->msix_table[i];
-
- if (!assigned_dev_msix_masked(&orig) &&
- assigned_dev_msix_masked(entry)) {
- /*
- * Vector masked, disable it
- *
- * XXX It's not clear if we can or should actually attempt
- * to mask or disable the interrupt. KVM doesn't have
- * support for pending bits and kvm_assign_set_msix_entry
- * doesn't modify the device hardware mask. Interrupts
- * while masked are simply not injected to the guest, so
- * are lost. Can we get away with always injecting an
- * interrupt on unmask?
- */
- } else if (assigned_dev_msix_masked(&orig) &&
- !assigned_dev_msix_masked(entry)) {
- /* Vector unmasked */
- if (i >= adev->msi_virq_nr || adev->msi_virq[i] < 0) {
- /* Previously unassigned vector, start from scratch */
- assigned_dev_update_msix(pdev);
- return;
- } else {
- /* Update an existing, previously masked vector */
- MSIMessage msg;
- int ret;
-
- msg.address = entry->addr_lo |
- ((uint64_t)entry->addr_hi << 32);
- msg.data = entry->data;
-
- ret = kvm_irqchip_update_msi_route(kvm_state,
- adev->msi_virq[i], msg,
- pdev);
- if (ret) {
- error_report("Error updating irq routing entry (%d)", ret);
- }
- kvm_irqchip_commit_routes(kvm_state);
- }
- }
- }
-}
-
-static const MemoryRegionOps assigned_dev_msix_mmio_ops = {
- .read = assigned_dev_msix_mmio_read,
- .write = assigned_dev_msix_mmio_write,
- .endianness = DEVICE_NATIVE_ENDIAN,
- .valid = {
- .min_access_size = 4,
- .max_access_size = 8,
- },
- .impl = {
- .min_access_size = 4,
- .max_access_size = 8,
- },
-};
-
-static void assigned_dev_msix_reset(AssignedDevice *dev)
-{
- MSIXTableEntry *entry;
- int i;
-
- if (!dev->msix_table) {
- return;
- }
-
- memset(dev->msix_table, 0, dev->msix_table_size);
-
- for (i = 0, entry = dev->msix_table; i < dev->msix_max; i++, entry++) {
- entry->ctrl = cpu_to_le32(0x1); /* Masked */
- }
-}
-
-static void assigned_dev_register_msix_mmio(AssignedDevice *dev, Error **errp)
-{
- dev->msix_table = mmap(NULL, dev->msix_table_size, PROT_READ | PROT_WRITE,
- MAP_ANONYMOUS | MAP_PRIVATE, 0, 0);
- if (dev->msix_table == MAP_FAILED) {
- error_setg_errno(errp, errno, "failed to allocate msix_table");
- dev->msix_table = NULL;
- return;
- }
- dev->dev.msix_table = (uint8_t *)dev->msix_table;
-
- assigned_dev_msix_reset(dev);
-
- memory_region_init_io(&dev->mmio, OBJECT(dev), &assigned_dev_msix_mmio_ops,
- dev, "assigned-dev-msix", dev->msix_table_size);
-}
-
-static void assigned_dev_unregister_msix_mmio(AssignedDevice *dev)
-{
- if (!dev->msix_table) {
- return;
- }
-
- if (munmap(dev->msix_table, dev->msix_table_size) == -1) {
- error_report("error unmapping msix_table! %s", strerror(errno));
- }
- dev->msix_table = NULL;
- dev->dev.msix_table = NULL;
-}
-
-static const VMStateDescription vmstate_assigned_device = {
- .name = "pci-assign",
- .unmigratable = 1,
-};
-
-static void reset_assigned_device(DeviceState *dev)
-{
- PCIDevice *pci_dev = PCI_DEVICE(dev);
- AssignedDevice *adev = PCI_ASSIGN(pci_dev);
- char reset_file[64];
- const char reset[] = "1";
- int fd, ret;
-
- /*
- * If a guest is reset without being shutdown, MSI/MSI-X can still
- * be running. We want to return the device to a known state on
- * reset, so disable those here. We especially do not want MSI-X
- * enabled since it lives in MMIO space, which is about to get
- * disabled.
- */
- if (adev->assigned_irq_type == ASSIGNED_IRQ_MSIX) {
- uint16_t ctrl = pci_get_word(pci_dev->config +
- pci_dev->msix_cap + PCI_MSIX_FLAGS);
-
- pci_set_word(pci_dev->config + pci_dev->msix_cap + PCI_MSIX_FLAGS,
- ctrl & ~PCI_MSIX_FLAGS_ENABLE);
- assigned_dev_update_msix(pci_dev);
- } else if (adev->assigned_irq_type == ASSIGNED_IRQ_MSI) {
- uint8_t ctrl = pci_get_byte(pci_dev->config +
- pci_dev->msi_cap + PCI_MSI_FLAGS);
-
- pci_set_byte(pci_dev->config + pci_dev->msi_cap + PCI_MSI_FLAGS,
- ctrl & ~PCI_MSI_FLAGS_ENABLE);
- assigned_dev_update_msi(pci_dev);
- }
-
- snprintf(reset_file, sizeof(reset_file),
- "/sys/bus/pci/devices/%04x:%02x:%02x.%01x/reset",
- adev->host.domain, adev->host.bus, adev->host.slot,
- adev->host.function);
-
- /*
- * Issue a device reset via pci-sysfs. Note that we use write(2) here
- * and ignore the return value because some kernels have a bug that
- * returns 0 rather than bytes written on success, sending us into an
- * infinite retry loop using other write mechanisms.
- */
- fd = open(reset_file, O_WRONLY);
- if (fd != -1) {
- ret = write(fd, reset, strlen(reset));
- (void)ret;
- close(fd);
- }
-
- /*
- * When a 0 is written to the bus master register, the device is logically
- * disconnected from the PCI bus. This avoids further DMA transfers.
- */
- assigned_dev_pci_write_config(pci_dev, PCI_COMMAND, 0, 1);
-}
-
-static void assigned_realize(struct PCIDevice *pci_dev, Error **errp)
-{
- AssignedDevice *dev = PCI_ASSIGN(pci_dev);
- uint8_t e_intx;
- int r;
- Error *local_err = NULL;
-
- if (!kvm_enabled()) {
- error_setg(&local_err, "pci-assign requires KVM support");
- goto exit_with_error;
- }
-
- if (!dev->host.domain && !dev->host.bus && !dev->host.slot &&
- !dev->host.function) {
- error_setg(&local_err, "no host device specified");
- goto exit_with_error;
- }
-
- /*
- * Set up basic config space access control. Will be further refined during
- * device initialization.
- */
- assigned_dev_emulate_config_read(dev, 0, PCI_CONFIG_SPACE_SIZE);
- assigned_dev_direct_config_read(dev, PCI_STATUS, 2);
- assigned_dev_direct_config_read(dev, PCI_REVISION_ID, 1);
- assigned_dev_direct_config_read(dev, PCI_CLASS_PROG, 3);
- assigned_dev_direct_config_read(dev, PCI_CACHE_LINE_SIZE, 1);
- assigned_dev_direct_config_read(dev, PCI_LATENCY_TIMER, 1);
- assigned_dev_direct_config_read(dev, PCI_BIST, 1);
- assigned_dev_direct_config_read(dev, PCI_CARDBUS_CIS, 4);
- assigned_dev_direct_config_read(dev, PCI_SUBSYSTEM_VENDOR_ID, 2);
- assigned_dev_direct_config_read(dev, PCI_SUBSYSTEM_ID, 2);
- assigned_dev_direct_config_read(dev, PCI_CAPABILITY_LIST + 1, 7);
- assigned_dev_direct_config_read(dev, PCI_MIN_GNT, 1);
- assigned_dev_direct_config_read(dev, PCI_MAX_LAT, 1);
- memcpy(dev->emulate_config_write, dev->emulate_config_read,
- sizeof(dev->emulate_config_read));
-
- get_real_device(dev, &local_err);
- if (local_err) {
- goto out;
- }
-
- if (assigned_device_pci_cap_init(pci_dev, &local_err) < 0) {
- goto out;
- }
-
- /* intercept MSI-X entry page in the MMIO */
- if (dev->cap.available & ASSIGNED_DEVICE_CAP_MSIX) {
- assigned_dev_register_msix_mmio(dev, &local_err);
- if (local_err) {
- goto out;
- }
- }
-
- /* handle real device's MMIO/PIO BARs */
- assigned_dev_register_regions(dev->real_device.regions,
- dev->real_device.region_number, dev,
- &local_err);
- if (local_err) {
- goto out;
- }
-
- /* handle interrupt routing */
- e_intx = dev->dev.config[PCI_INTERRUPT_PIN] - 1;
- dev->intpin = e_intx;
- dev->intx_route.mode = PCI_INTX_DISABLED;
- dev->intx_route.irq = -1;
-
- /* assign device to guest */
- assign_device(dev, &local_err);
- if (local_err) {
- goto out;
- }
-
- /* assign legacy INTx to the device */
- r = assign_intx(dev, &local_err);
- if (r < 0) {
- goto assigned_out;
- }
-
- assigned_dev_load_option_rom(dev);
-
- return;
-
-assigned_out:
- deassign_device(dev);
-
-out:
- free_assigned_device(dev);
-
-exit_with_error:
- assert(local_err);
- error_propagate(errp, local_err);
-}
-
-static void assigned_exitfn(struct PCIDevice *pci_dev)
-{
- AssignedDevice *dev = PCI_ASSIGN(pci_dev);
-
- deassign_device(dev);
- free_assigned_device(dev);
-}
-
-static void assigned_dev_instance_init(Object *obj)
-{
- PCIDevice *pci_dev = PCI_DEVICE(obj);
- AssignedDevice *d = PCI_ASSIGN(pci_dev);
-
- device_add_bootindex_property(obj, &d->bootindex,
- "bootindex", NULL,
- &pci_dev->qdev, NULL);
-}
-
-static Property assigned_dev_properties[] = {
- DEFINE_PROP_PCI_HOST_DEVADDR("host", AssignedDevice, host),
- DEFINE_PROP_BIT("prefer_msi", AssignedDevice, features,
- ASSIGNED_DEVICE_PREFER_MSI_BIT, false),
- DEFINE_PROP_BIT("share_intx", AssignedDevice, features,
- ASSIGNED_DEVICE_SHARE_INTX_BIT, true),
- DEFINE_PROP_STRING("configfd", AssignedDevice, configfd_name),
- DEFINE_PROP_END_OF_LIST(),
-};
-
-static void assign_class_init(ObjectClass *klass, void *data)
-{
- PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
- DeviceClass *dc = DEVICE_CLASS(klass);
-
- k->realize = assigned_realize;
- k->exit = assigned_exitfn;
- k->config_read = assigned_dev_pci_read_config;
- k->config_write = assigned_dev_pci_write_config;
- dc->props = assigned_dev_properties;
- dc->vmsd = &vmstate_assigned_device;
- dc->reset = reset_assigned_device;
- set_bit(DEVICE_CATEGORY_MISC, dc->categories);
- dc->desc = "KVM-based PCI passthrough";
-}
-
-static const TypeInfo assign_info = {
- .name = TYPE_PCI_ASSIGN,
- .parent = TYPE_PCI_DEVICE,
- .instance_size = sizeof(AssignedDevice),
- .class_init = assign_class_init,
- .instance_init = assigned_dev_instance_init,
-};
-
-static void assign_register_types(void)
-{
- type_register_static(&assign_info);
-}
-
-type_init(assign_register_types)
-
-static void assigned_dev_load_option_rom(AssignedDevice *dev)
-{
- int size = 0;
-
- pci_assign_dev_load_option_rom(&dev->dev, OBJECT(dev), &size,
- dev->host.domain, dev->host.bus,
- dev->host.slot, dev->host.function);
-}
--
2.14.2
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