-/*
- * vfio based device assignment support
- *
- * Copyright Red Hat, Inc. 2012
- *
- * Authors:
- * Alex Williamson <alex.williamson@redhat.com>
- *
- * This work is licensed under the terms of the GNU GPL, version 2. See
- * the COPYING file in the top-level directory.
- *
- * Based on qemu-kvm device-assignment:
- * Adapted for KVM by Qumranet.
- * Copyright (c) 2007, Neocleus, Alex Novik (alex@neocleus.com)
- * Copyright (c) 2007, Neocleus, Guy Zana (guy@neocleus.com)
- * Copyright (C) 2008, Qumranet, Amit Shah (amit.shah@qumranet.com)
- * Copyright (C) 2008, Red Hat, Amit Shah (amit.shah@redhat.com)
- * Copyright (C) 2008, IBM, Muli Ben-Yehuda (muli@il.ibm.com)
- */
-
-#include <dirent.h>
-#include <linux/vfio.h>
-#include <sys/ioctl.h>
-#include <sys/mman.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#include "config.h"
-#include "exec/address-spaces.h"
-#include "exec/memory.h"
-#include "hw/pci/msi.h"
-#include "hw/pci/msix.h"
-#include "hw/pci/pci.h"
-#include "qemu-common.h"
-#include "qemu/error-report.h"
-#include "qemu/event_notifier.h"
-#include "qemu/queue.h"
-#include "qemu/range.h"
-#include "sysemu/kvm.h"
-#include "sysemu/sysemu.h"
-#include "hw/misc/vfio.h"
-#include "trace.h"
-
-/* Extra debugging, trap acceleration paths for more logging */
-#define VFIO_ALLOW_MMAP 1
-#define VFIO_ALLOW_KVM_INTX 1
-#define VFIO_ALLOW_KVM_MSI 1
-#define VFIO_ALLOW_KVM_MSIX 1
-
-struct VFIODevice;
-
-typedef struct VFIOQuirk {
- MemoryRegion mem;
- struct VFIODevice *vdev;
- QLIST_ENTRY(VFIOQuirk) next;
- struct {
- uint32_t base_offset:TARGET_PAGE_BITS;
- uint32_t address_offset:TARGET_PAGE_BITS;
- uint32_t address_size:3;
- uint32_t bar:3;
-
- uint32_t address_match;
- uint32_t address_mask;
-
- uint32_t address_val:TARGET_PAGE_BITS;
- uint32_t data_offset:TARGET_PAGE_BITS;
- uint32_t data_size:3;
-
- uint8_t flags;
- uint8_t read_flags;
- uint8_t write_flags;
- } data;
-} VFIOQuirk;
-
-typedef struct VFIOBAR {
- off_t fd_offset; /* offset of BAR within device fd */
- int fd; /* device fd, allows us to pass VFIOBAR as opaque data */
- MemoryRegion mem; /* slow, read/write access */
- MemoryRegion mmap_mem; /* direct mapped access */
- void *mmap;
- size_t size;
- uint32_t flags; /* VFIO region flags (rd/wr/mmap) */
- uint8_t nr; /* cache the BAR number for debug */
- bool ioport;
- bool mem64;
- QLIST_HEAD(, VFIOQuirk) quirks;
-} VFIOBAR;
-
-typedef struct VFIOVGARegion {
- MemoryRegion mem;
- off_t offset;
- int nr;
- QLIST_HEAD(, VFIOQuirk) quirks;
-} VFIOVGARegion;
-
-typedef struct VFIOVGA {
- off_t fd_offset;
- int fd;
- VFIOVGARegion region[QEMU_PCI_VGA_NUM_REGIONS];
-} VFIOVGA;
-
-typedef struct VFIOINTx {
- bool pending; /* interrupt pending */
- bool kvm_accel; /* set when QEMU bypass through KVM enabled */
- uint8_t pin; /* which pin to pull for qemu_set_irq */
- EventNotifier interrupt; /* eventfd triggered on interrupt */
- EventNotifier unmask; /* eventfd for unmask on QEMU bypass */
- PCIINTxRoute route; /* routing info for QEMU bypass */
- uint32_t mmap_timeout; /* delay to re-enable mmaps after interrupt */
- QEMUTimer *mmap_timer; /* enable mmaps after periods w/o interrupts */
-} VFIOINTx;
-
-typedef struct VFIOMSIVector {
- /*
- * Two interrupt paths are configured per vector. The first, is only used
- * for interrupts injected via QEMU. This is typically the non-accel path,
- * but may also be used when we want QEMU to handle masking and pending
- * bits. The KVM path bypasses QEMU and is therefore higher performance,
- * but requires masking at the device. virq is used to track the MSI route
- * through KVM, thus kvm_interrupt is only available when virq is set to a
- * valid (>= 0) value.
- */
- EventNotifier interrupt;
- EventNotifier kvm_interrupt;
- struct VFIODevice *vdev; /* back pointer to device */
- int virq;
- bool use;
-} VFIOMSIVector;
-
-enum {
- VFIO_INT_NONE = 0,
- VFIO_INT_INTx = 1,
- VFIO_INT_MSI = 2,
- VFIO_INT_MSIX = 3,
-};
-
-typedef struct VFIOAddressSpace {
- AddressSpace *as;
- QLIST_HEAD(, VFIOContainer) containers;
- QLIST_ENTRY(VFIOAddressSpace) list;
-} VFIOAddressSpace;
-
-static QLIST_HEAD(, VFIOAddressSpace) vfio_address_spaces =
- QLIST_HEAD_INITIALIZER(vfio_address_spaces);
-
-struct VFIOGroup;
-
-typedef struct VFIOType1 {
- MemoryListener listener;
- int error;
- bool initialized;
-} VFIOType1;
-
-typedef struct VFIOContainer {
- VFIOAddressSpace *space;
- int fd; /* /dev/vfio/vfio, empowered by the attached groups */
- struct {
- /* enable abstraction to support various iommu backends */
- union {
- VFIOType1 type1;
- };
- void (*release)(struct VFIOContainer *);
- } iommu_data;
- QLIST_HEAD(, VFIOGuestIOMMU) giommu_list;
- QLIST_HEAD(, VFIOGroup) group_list;
- QLIST_ENTRY(VFIOContainer) next;
-} VFIOContainer;
-
-typedef struct VFIOGuestIOMMU {
- VFIOContainer *container;
- MemoryRegion *iommu;
- Notifier n;
- QLIST_ENTRY(VFIOGuestIOMMU) giommu_next;
-} VFIOGuestIOMMU;
-
-/* Cache of MSI-X setup plus extra mmap and memory region for split BAR map */
-typedef struct VFIOMSIXInfo {
- uint8_t table_bar;
- uint8_t pba_bar;
- uint16_t entries;
- uint32_t table_offset;
- uint32_t pba_offset;
- MemoryRegion mmap_mem;
- void *mmap;
-} VFIOMSIXInfo;
-
-typedef struct VFIODevice {
- PCIDevice pdev;
- int fd;
- VFIOINTx intx;
- unsigned int config_size;
- uint8_t *emulated_config_bits; /* QEMU emulated bits, little-endian */
- off_t config_offset; /* Offset of config space region within device fd */
- unsigned int rom_size;
- off_t rom_offset; /* Offset of ROM region within device fd */
- void *rom;
- int msi_cap_size;
- VFIOMSIVector *msi_vectors;
- VFIOMSIXInfo *msix;
- int nr_vectors; /* Number of MSI/MSIX vectors currently in use */
- int interrupt; /* Current interrupt type */
- VFIOBAR bars[PCI_NUM_REGIONS - 1]; /* No ROM */
- VFIOVGA vga; /* 0xa0000, 0x3b0, 0x3c0 */
- PCIHostDeviceAddress host;
- QLIST_ENTRY(VFIODevice) next;
- struct VFIOGroup *group;
- EventNotifier err_notifier;
- uint32_t features;
-#define VFIO_FEATURE_ENABLE_VGA_BIT 0
-#define VFIO_FEATURE_ENABLE_VGA (1 << VFIO_FEATURE_ENABLE_VGA_BIT)
- int32_t bootindex;
- uint8_t pm_cap;
- bool reset_works;
- bool has_vga;
- bool pci_aer;
- bool has_flr;
- bool has_pm_reset;
- bool needs_reset;
- bool rom_read_failed;
-} VFIODevice;
-
-typedef struct VFIOGroup {
- int fd;
- int groupid;
- VFIOContainer *container;
- QLIST_HEAD(, VFIODevice) device_list;
- QLIST_ENTRY(VFIOGroup) next;
- QLIST_ENTRY(VFIOGroup) container_next;
-} VFIOGroup;
-
-typedef struct VFIORomBlacklistEntry {
- uint16_t vendor_id;
- uint16_t device_id;
-} VFIORomBlacklistEntry;
-
-/*
- * List of device ids/vendor ids for which to disable
- * option rom loading. This avoids the guest hangs during rom
- * execution as noticed with the BCM 57810 card for lack of a
- * more better way to handle such issues.
- * The user can still override by specifying a romfile or
- * rombar=1.
- * Please see https://bugs.launchpad.net/qemu/+bug/1284874
- * for an analysis of the 57810 card hang. When adding
- * a new vendor id/device id combination below, please also add
- * your card/environment details and information that could
- * help in debugging to the bug tracking this issue
- */
-static const VFIORomBlacklistEntry romblacklist[] = {
- /* Broadcom BCM 57810 */
- { 0x14e4, 0x168e }
-};
-
-#define MSIX_CAP_LENGTH 12
-
-static QLIST_HEAD(, VFIOGroup)
- group_list = QLIST_HEAD_INITIALIZER(group_list);
-
-#ifdef CONFIG_KVM
-/*
- * We have a single VFIO pseudo device per KVM VM. Once created it lives
- * for the life of the VM. Closing the file descriptor only drops our
- * reference to it and the device's reference to kvm. Therefore once
- * initialized, this file descriptor is only released on QEMU exit and
- * we'll re-use it should another vfio device be attached before then.
- */
-static int vfio_kvm_device_fd = -1;
-#endif
-
-static void vfio_disable_interrupts(VFIODevice *vdev);
-static uint32_t vfio_pci_read_config(PCIDevice *pdev, uint32_t addr, int len);
-static void vfio_pci_write_config(PCIDevice *pdev, uint32_t addr,
- uint32_t val, int len);
-static void vfio_mmap_set_enabled(VFIODevice *vdev, bool enabled);
-
-/*
- * Common VFIO interrupt disable
- */
-static void vfio_disable_irqindex(VFIODevice *vdev, int index)
-{
- struct vfio_irq_set irq_set = {
- .argsz = sizeof(irq_set),
- .flags = VFIO_IRQ_SET_DATA_NONE | VFIO_IRQ_SET_ACTION_TRIGGER,
- .index = index,
- .start = 0,
- .count = 0,
- };
-
- ioctl(vdev->fd, VFIO_DEVICE_SET_IRQS, &irq_set);
-}
-
-/*
- * INTx
- */
-static void vfio_unmask_intx(VFIODevice *vdev)
-{
- struct vfio_irq_set irq_set = {
- .argsz = sizeof(irq_set),
- .flags = VFIO_IRQ_SET_DATA_NONE | VFIO_IRQ_SET_ACTION_UNMASK,
- .index = VFIO_PCI_INTX_IRQ_INDEX,
- .start = 0,
- .count = 1,
- };
-
- ioctl(vdev->fd, VFIO_DEVICE_SET_IRQS, &irq_set);
-}
-
-#ifdef CONFIG_KVM /* Unused outside of CONFIG_KVM code */
-static void vfio_mask_intx(VFIODevice *vdev)
-{
- struct vfio_irq_set irq_set = {
- .argsz = sizeof(irq_set),
- .flags = VFIO_IRQ_SET_DATA_NONE | VFIO_IRQ_SET_ACTION_MASK,
- .index = VFIO_PCI_INTX_IRQ_INDEX,
- .start = 0,
- .count = 1,
- };
-
- ioctl(vdev->fd, VFIO_DEVICE_SET_IRQS, &irq_set);
-}
-#endif
-
-/*
- * Disabling BAR mmaping can be slow, but toggling it around INTx can
- * also be a huge overhead. We try to get the best of both worlds by
- * waiting until an interrupt to disable mmaps (subsequent transitions
- * to the same state are effectively no overhead). If the interrupt has
- * been serviced and the time gap is long enough, we re-enable mmaps for
- * performance. This works well for things like graphics cards, which
- * may not use their interrupt at all and are penalized to an unusable
- * level by read/write BAR traps. Other devices, like NICs, have more
- * regular interrupts and see much better latency by staying in non-mmap
- * mode. We therefore set the default mmap_timeout such that a ping
- * is just enough to keep the mmap disabled. Users can experiment with
- * other options with the x-intx-mmap-timeout-ms parameter (a value of
- * zero disables the timer).
- */
-static void vfio_intx_mmap_enable(void *opaque)
-{
- VFIODevice *vdev = opaque;
-
- if (vdev->intx.pending) {
- timer_mod(vdev->intx.mmap_timer,
- qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) + vdev->intx.mmap_timeout);
- return;
- }
-
- vfio_mmap_set_enabled(vdev, true);
-}
-
-static void vfio_intx_interrupt(void *opaque)
-{
- VFIODevice *vdev = opaque;
-
- if (!event_notifier_test_and_clear(&vdev->intx.interrupt)) {
- return;
- }
-
- trace_vfio_intx_interrupt(vdev->host.domain, vdev->host.bus,
- vdev->host.slot, vdev->host.function,
- 'A' + vdev->intx.pin);
-
- vdev->intx.pending = true;
- pci_irq_assert(&vdev->pdev);
- vfio_mmap_set_enabled(vdev, false);
- if (vdev->intx.mmap_timeout) {
- timer_mod(vdev->intx.mmap_timer,
- qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) + vdev->intx.mmap_timeout);
- }
-}
-
-static void vfio_eoi(VFIODevice *vdev)
-{
- if (!vdev->intx.pending) {
- return;
- }
-
- trace_vfio_eoi(vdev->host.domain, vdev->host.bus,
- vdev->host.slot, vdev->host.function);
-
- vdev->intx.pending = false;
- pci_irq_deassert(&vdev->pdev);
- vfio_unmask_intx(vdev);
-}
-
-static void vfio_enable_intx_kvm(VFIODevice *vdev)
-{
-#ifdef CONFIG_KVM
- struct kvm_irqfd irqfd = {
- .fd = event_notifier_get_fd(&vdev->intx.interrupt),
- .gsi = vdev->intx.route.irq,
- .flags = KVM_IRQFD_FLAG_RESAMPLE,
- };
- struct vfio_irq_set *irq_set;
- int ret, argsz;
- int32_t *pfd;
-
- if (!VFIO_ALLOW_KVM_INTX || !kvm_irqfds_enabled() ||
- vdev->intx.route.mode != PCI_INTX_ENABLED ||
- !kvm_resamplefds_enabled()) {
- return;
- }
-
- /* Get to a known interrupt state */
- qemu_set_fd_handler(irqfd.fd, NULL, NULL, vdev);
- vfio_mask_intx(vdev);
- vdev->intx.pending = false;
- pci_irq_deassert(&vdev->pdev);
-
- /* Get an eventfd for resample/unmask */
- if (event_notifier_init(&vdev->intx.unmask, 0)) {
- error_report("vfio: Error: event_notifier_init failed eoi");
- goto fail;
- }
-
- /* KVM triggers it, VFIO listens for it */
- irqfd.resamplefd = event_notifier_get_fd(&vdev->intx.unmask);
-
- if (kvm_vm_ioctl(kvm_state, KVM_IRQFD, &irqfd)) {
- error_report("vfio: Error: Failed to setup resample irqfd: %m");
- goto fail_irqfd;
- }
-
- argsz = sizeof(*irq_set) + sizeof(*pfd);
-
- irq_set = g_malloc0(argsz);
- irq_set->argsz = argsz;
- irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD | VFIO_IRQ_SET_ACTION_UNMASK;
- irq_set->index = VFIO_PCI_INTX_IRQ_INDEX;
- irq_set->start = 0;
- irq_set->count = 1;
- pfd = (int32_t *)&irq_set->data;
-
- *pfd = irqfd.resamplefd;
-
- ret = ioctl(vdev->fd, VFIO_DEVICE_SET_IRQS, irq_set);
- g_free(irq_set);
- if (ret) {
- error_report("vfio: Error: Failed to setup INTx unmask fd: %m");
- goto fail_vfio;
- }
-
- /* Let'em rip */
- vfio_unmask_intx(vdev);
-
- vdev->intx.kvm_accel = true;
-
- trace_vfio_enable_intx_kvm(vdev->host.domain, vdev->host.bus,
- vdev->host.slot, vdev->host.function);
-
- return;
-
-fail_vfio:
- irqfd.flags = KVM_IRQFD_FLAG_DEASSIGN;
- kvm_vm_ioctl(kvm_state, KVM_IRQFD, &irqfd);
-fail_irqfd:
- event_notifier_cleanup(&vdev->intx.unmask);
-fail:
- qemu_set_fd_handler(irqfd.fd, vfio_intx_interrupt, NULL, vdev);
- vfio_unmask_intx(vdev);
-#endif
-}
-
-static void vfio_disable_intx_kvm(VFIODevice *vdev)
-{
-#ifdef CONFIG_KVM
- struct kvm_irqfd irqfd = {
- .fd = event_notifier_get_fd(&vdev->intx.interrupt),
- .gsi = vdev->intx.route.irq,
- .flags = KVM_IRQFD_FLAG_DEASSIGN,
- };
-
- if (!vdev->intx.kvm_accel) {
- return;
- }
-
- /*
- * Get to a known state, hardware masked, QEMU ready to accept new
- * interrupts, QEMU IRQ de-asserted.
- */
- vfio_mask_intx(vdev);
- vdev->intx.pending = false;
- pci_irq_deassert(&vdev->pdev);
-
- /* Tell KVM to stop listening for an INTx irqfd */
- if (kvm_vm_ioctl(kvm_state, KVM_IRQFD, &irqfd)) {
- error_report("vfio: Error: Failed to disable INTx irqfd: %m");
- }
-
- /* We only need to close the eventfd for VFIO to cleanup the kernel side */
- event_notifier_cleanup(&vdev->intx.unmask);
-
- /* QEMU starts listening for interrupt events. */
- qemu_set_fd_handler(irqfd.fd, vfio_intx_interrupt, NULL, vdev);
-
- vdev->intx.kvm_accel = false;
-
- /* If we've missed an event, let it re-fire through QEMU */
- vfio_unmask_intx(vdev);
-
- trace_vfio_disable_intx_kvm(vdev->host.domain, vdev->host.bus,
- vdev->host.slot, vdev->host.function);
-#endif
-}
-
-static void vfio_update_irq(PCIDevice *pdev)
-{
- VFIODevice *vdev = DO_UPCAST(VFIODevice, pdev, pdev);
- PCIINTxRoute route;
-
- if (vdev->interrupt != VFIO_INT_INTx) {
- return;
- }
-
- route = pci_device_route_intx_to_irq(&vdev->pdev, vdev->intx.pin);
-
- if (!pci_intx_route_changed(&vdev->intx.route, &route)) {
- return; /* Nothing changed */
- }
-
- trace_vfio_update_irq(vdev->host.domain, vdev->host.bus,
- vdev->host.slot, vdev->host.function,
- vdev->intx.route.irq, route.irq);
-
- vfio_disable_intx_kvm(vdev);
-
- vdev->intx.route = route;
-
- if (route.mode != PCI_INTX_ENABLED) {
- return;
- }
-
- vfio_enable_intx_kvm(vdev);
-
- /* Re-enable the interrupt in cased we missed an EOI */
- vfio_eoi(vdev);
-}
-
-static int vfio_enable_intx(VFIODevice *vdev)
-{
- uint8_t pin = vfio_pci_read_config(&vdev->pdev, PCI_INTERRUPT_PIN, 1);
- int ret, argsz;
- struct vfio_irq_set *irq_set;
- int32_t *pfd;
-
- if (!pin) {
- return 0;
- }
-
- vfio_disable_interrupts(vdev);
-
- vdev->intx.pin = pin - 1; /* Pin A (1) -> irq[0] */
- pci_config_set_interrupt_pin(vdev->pdev.config, pin);
-
-#ifdef CONFIG_KVM
- /*
- * Only conditional to avoid generating error messages on platforms
- * where we won't actually use the result anyway.
- */
- if (kvm_irqfds_enabled() && kvm_resamplefds_enabled()) {
- vdev->intx.route = pci_device_route_intx_to_irq(&vdev->pdev,
- vdev->intx.pin);
- }
-#endif
-
- ret = event_notifier_init(&vdev->intx.interrupt, 0);
- if (ret) {
- error_report("vfio: Error: event_notifier_init failed");
- return ret;
- }
-
- argsz = sizeof(*irq_set) + sizeof(*pfd);
-
- irq_set = g_malloc0(argsz);
- irq_set->argsz = argsz;
- irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD | VFIO_IRQ_SET_ACTION_TRIGGER;
- irq_set->index = VFIO_PCI_INTX_IRQ_INDEX;
- irq_set->start = 0;
- irq_set->count = 1;
- pfd = (int32_t *)&irq_set->data;
-
- *pfd = event_notifier_get_fd(&vdev->intx.interrupt);
- qemu_set_fd_handler(*pfd, vfio_intx_interrupt, NULL, vdev);
-
- ret = ioctl(vdev->fd, VFIO_DEVICE_SET_IRQS, irq_set);
- g_free(irq_set);
- if (ret) {
- error_report("vfio: Error: Failed to setup INTx fd: %m");
- qemu_set_fd_handler(*pfd, NULL, NULL, vdev);
- event_notifier_cleanup(&vdev->intx.interrupt);
- return -errno;
- }
-
- vfio_enable_intx_kvm(vdev);
-
- vdev->interrupt = VFIO_INT_INTx;
-
- trace_vfio_enable_intx(vdev->host.domain, vdev->host.bus,
- vdev->host.slot, vdev->host.function);
-
- return 0;
-}
-
-static void vfio_disable_intx(VFIODevice *vdev)
-{
- int fd;
-
- timer_del(vdev->intx.mmap_timer);
- vfio_disable_intx_kvm(vdev);
- vfio_disable_irqindex(vdev, VFIO_PCI_INTX_IRQ_INDEX);
- vdev->intx.pending = false;
- pci_irq_deassert(&vdev->pdev);
- vfio_mmap_set_enabled(vdev, true);
-
- fd = event_notifier_get_fd(&vdev->intx.interrupt);
- qemu_set_fd_handler(fd, NULL, NULL, vdev);
- event_notifier_cleanup(&vdev->intx.interrupt);
-
- vdev->interrupt = VFIO_INT_NONE;
-
- trace_vfio_disable_intx(vdev->host.domain, vdev->host.bus,
- vdev->host.slot, vdev->host.function);
-}
-
-/*
- * MSI/X
- */
-static void vfio_msi_interrupt(void *opaque)
-{
- VFIOMSIVector *vector = opaque;
- VFIODevice *vdev = vector->vdev;
- int nr = vector - vdev->msi_vectors;
-
- if (!event_notifier_test_and_clear(&vector->interrupt)) {
- return;
- }
-
-#ifdef DEBUG_VFIO
- MSIMessage msg;
-
- if (vdev->interrupt == VFIO_INT_MSIX) {
- msg = msix_get_message(&vdev->pdev, nr);
- } else if (vdev->interrupt == VFIO_INT_MSI) {
- msg = msi_get_message(&vdev->pdev, nr);
- } else {
- abort();
- }
-
- trace_vfio_msi_interrupt(vdev->host.domain, vdev->host.bus,
- vdev->host.slot, vdev->host.function,
- nr, msg.address, msg.data);
-#endif
-
- if (vdev->interrupt == VFIO_INT_MSIX) {
- msix_notify(&vdev->pdev, nr);
- } else if (vdev->interrupt == VFIO_INT_MSI) {
- msi_notify(&vdev->pdev, nr);
- } else {
- error_report("vfio: MSI interrupt receieved, but not enabled?");
- }
-}
-
-static int vfio_enable_vectors(VFIODevice *vdev, bool msix)
-{
- struct vfio_irq_set *irq_set;
- int ret = 0, i, argsz;
- int32_t *fds;
-
- argsz = sizeof(*irq_set) + (vdev->nr_vectors * sizeof(*fds));
-
- irq_set = g_malloc0(argsz);
- irq_set->argsz = argsz;
- irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD | VFIO_IRQ_SET_ACTION_TRIGGER;
- irq_set->index = msix ? VFIO_PCI_MSIX_IRQ_INDEX : VFIO_PCI_MSI_IRQ_INDEX;
- irq_set->start = 0;
- irq_set->count = vdev->nr_vectors;
- fds = (int32_t *)&irq_set->data;
-
- for (i = 0; i < vdev->nr_vectors; i++) {
- int fd = -1;
-
- /*
- * MSI vs MSI-X - The guest has direct access to MSI mask and pending
- * bits, therefore we always use the KVM signaling path when setup.
- * MSI-X mask and pending bits are emulated, so we want to use the
- * KVM signaling path only when configured and unmasked.
- */
- if (vdev->msi_vectors[i].use) {
- if (vdev->msi_vectors[i].virq < 0 ||
- (msix && msix_is_masked(&vdev->pdev, i))) {
- fd = event_notifier_get_fd(&vdev->msi_vectors[i].interrupt);
- } else {
- fd = event_notifier_get_fd(&vdev->msi_vectors[i].kvm_interrupt);
- }
- }
-
- fds[i] = fd;
- }
-
- ret = ioctl(vdev->fd, VFIO_DEVICE_SET_IRQS, irq_set);
-
- g_free(irq_set);
-
- return ret;
-}
-
-static void vfio_add_kvm_msi_virq(VFIOMSIVector *vector, MSIMessage *msg,
- bool msix)
-{
- int virq;
-
- if ((msix && !VFIO_ALLOW_KVM_MSIX) ||
- (!msix && !VFIO_ALLOW_KVM_MSI) || !msg) {
- return;
- }
-
- if (event_notifier_init(&vector->kvm_interrupt, 0)) {
- return;
- }
-
- virq = kvm_irqchip_add_msi_route(kvm_state, *msg);
- if (virq < 0) {
- event_notifier_cleanup(&vector->kvm_interrupt);
- return;
- }
-
- if (kvm_irqchip_add_irqfd_notifier(kvm_state, &vector->kvm_interrupt,
- NULL, virq) < 0) {
- kvm_irqchip_release_virq(kvm_state, virq);
- event_notifier_cleanup(&vector->kvm_interrupt);
- return;
- }
-
- vector->virq = virq;
-}
-
-static void vfio_remove_kvm_msi_virq(VFIOMSIVector *vector)
-{
- kvm_irqchip_remove_irqfd_notifier(kvm_state, &vector->kvm_interrupt,
- vector->virq);
- kvm_irqchip_release_virq(kvm_state, vector->virq);
- vector->virq = -1;
- event_notifier_cleanup(&vector->kvm_interrupt);
-}
-
-static void vfio_update_kvm_msi_virq(VFIOMSIVector *vector, MSIMessage msg)
-{
- kvm_irqchip_update_msi_route(kvm_state, vector->virq, msg);
-}
-
-static int vfio_msix_vector_do_use(PCIDevice *pdev, unsigned int nr,
- MSIMessage *msg, IOHandler *handler)
-{
- VFIODevice *vdev = DO_UPCAST(VFIODevice, pdev, pdev);
- VFIOMSIVector *vector;
- int ret;
-
- trace_vfio_msix_vector_do_use(vdev->host.domain, vdev->host.bus,
- vdev->host.slot, vdev->host.function,
- nr);
-
- vector = &vdev->msi_vectors[nr];
-
- if (!vector->use) {
- vector->vdev = vdev;
- vector->virq = -1;
- if (event_notifier_init(&vector->interrupt, 0)) {
- error_report("vfio: Error: event_notifier_init failed");
- }
- vector->use = true;
- msix_vector_use(pdev, nr);
- }
-
- qemu_set_fd_handler(event_notifier_get_fd(&vector->interrupt),
- handler, NULL, vector);
-
- /*
- * Attempt to enable route through KVM irqchip,
- * default to userspace handling if unavailable.
- */
- if (vector->virq >= 0) {
- if (!msg) {
- vfio_remove_kvm_msi_virq(vector);
- } else {
- vfio_update_kvm_msi_virq(vector, *msg);
- }
- } else {
- vfio_add_kvm_msi_virq(vector, msg, true);
- }
-
- /*
- * We don't want to have the host allocate all possible MSI vectors
- * for a device if they're not in use, so we shutdown and incrementally
- * increase them as needed.
- */
- if (vdev->nr_vectors < nr + 1) {
- vfio_disable_irqindex(vdev, VFIO_PCI_MSIX_IRQ_INDEX);
- vdev->nr_vectors = nr + 1;
- ret = vfio_enable_vectors(vdev, true);
- if (ret) {
- error_report("vfio: failed to enable vectors, %d", ret);
- }
- } else {
- int argsz;
- struct vfio_irq_set *irq_set;
- int32_t *pfd;
-
- argsz = sizeof(*irq_set) + sizeof(*pfd);
-
- irq_set = g_malloc0(argsz);
- irq_set->argsz = argsz;
- irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD |
- VFIO_IRQ_SET_ACTION_TRIGGER;
- irq_set->index = VFIO_PCI_MSIX_IRQ_INDEX;
- irq_set->start = nr;
- irq_set->count = 1;
- pfd = (int32_t *)&irq_set->data;
-
- if (vector->virq >= 0) {
- *pfd = event_notifier_get_fd(&vector->kvm_interrupt);
- } else {
- *pfd = event_notifier_get_fd(&vector->interrupt);
- }
-
- ret = ioctl(vdev->fd, VFIO_DEVICE_SET_IRQS, irq_set);
- g_free(irq_set);
- if (ret) {
- error_report("vfio: failed to modify vector, %d", ret);
- }
- }
-
- return 0;
-}
-
-static int vfio_msix_vector_use(PCIDevice *pdev,
- unsigned int nr, MSIMessage msg)
-{
- return vfio_msix_vector_do_use(pdev, nr, &msg, vfio_msi_interrupt);
-}
-
-static void vfio_msix_vector_release(PCIDevice *pdev, unsigned int nr)
-{
- VFIODevice *vdev = DO_UPCAST(VFIODevice, pdev, pdev);
- VFIOMSIVector *vector = &vdev->msi_vectors[nr];
-
- trace_vfio_msix_vector_release(vdev->host.domain, vdev->host.bus,
- vdev->host.slot, vdev->host.function,
- nr);
-
- /*
- * There are still old guests that mask and unmask vectors on every
- * interrupt. If we're using QEMU bypass with a KVM irqfd, leave all of
- * the KVM setup in place, simply switch VFIO to use the non-bypass
- * eventfd. We'll then fire the interrupt through QEMU and the MSI-X
- * core will mask the interrupt and set pending bits, allowing it to
- * be re-asserted on unmask. Nothing to do if already using QEMU mode.
- */
- if (vector->virq >= 0) {
- int argsz;
- struct vfio_irq_set *irq_set;
- int32_t *pfd;
-
- argsz = sizeof(*irq_set) + sizeof(*pfd);
-
- irq_set = g_malloc0(argsz);
- irq_set->argsz = argsz;
- irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD |
- VFIO_IRQ_SET_ACTION_TRIGGER;
- irq_set->index = VFIO_PCI_MSIX_IRQ_INDEX;
- irq_set->start = nr;
- irq_set->count = 1;
- pfd = (int32_t *)&irq_set->data;
-
- *pfd = event_notifier_get_fd(&vector->interrupt);
-
- ioctl(vdev->fd, VFIO_DEVICE_SET_IRQS, irq_set);
-
- g_free(irq_set);
- }
-}
-
-static void vfio_enable_msix(VFIODevice *vdev)
-{
- vfio_disable_interrupts(vdev);
-
- vdev->msi_vectors = g_malloc0(vdev->msix->entries * sizeof(VFIOMSIVector));
-
- vdev->interrupt = VFIO_INT_MSIX;
-
- /*
- * Some communication channels between VF & PF or PF & fw rely on the
- * physical state of the device and expect that enabling MSI-X from the
- * guest enables the same on the host. When our guest is Linux, the
- * guest driver call to pci_enable_msix() sets the enabling bit in the
- * MSI-X capability, but leaves the vector table masked. We therefore
- * can't rely on a vector_use callback (from request_irq() in the guest)
- * to switch the physical device into MSI-X mode because that may come a
- * long time after pci_enable_msix(). This code enables vector 0 with
- * triggering to userspace, then immediately release the vector, leaving
- * the physical device with no vectors enabled, but MSI-X enabled, just
- * like the guest view.
- */
- vfio_msix_vector_do_use(&vdev->pdev, 0, NULL, NULL);
- vfio_msix_vector_release(&vdev->pdev, 0);
-
- if (msix_set_vector_notifiers(&vdev->pdev, vfio_msix_vector_use,
- vfio_msix_vector_release, NULL)) {
- error_report("vfio: msix_set_vector_notifiers failed");
- }
-
- trace_vfio_enable_msix(vdev->host.domain, vdev->host.bus,
- vdev->host.slot, vdev->host.function);
-}
-
-static void vfio_enable_msi(VFIODevice *vdev)
-{
- int ret, i;
-
- vfio_disable_interrupts(vdev);
-
- vdev->nr_vectors = msi_nr_vectors_allocated(&vdev->pdev);
-retry:
- vdev->msi_vectors = g_malloc0(vdev->nr_vectors * sizeof(VFIOMSIVector));
-
- for (i = 0; i < vdev->nr_vectors; i++) {
- VFIOMSIVector *vector = &vdev->msi_vectors[i];
- MSIMessage msg = msi_get_message(&vdev->pdev, i);
-
- vector->vdev = vdev;
- vector->virq = -1;
- vector->use = true;
-
- if (event_notifier_init(&vector->interrupt, 0)) {
- error_report("vfio: Error: event_notifier_init failed");
- }
-
- qemu_set_fd_handler(event_notifier_get_fd(&vector->interrupt),
- vfio_msi_interrupt, NULL, vector);
-
- /*
- * Attempt to enable route through KVM irqchip,
- * default to userspace handling if unavailable.
- */
- vfio_add_kvm_msi_virq(vector, &msg, false);
- }
-
- /* Set interrupt type prior to possible interrupts */
- vdev->interrupt = VFIO_INT_MSI;
-
- ret = vfio_enable_vectors(vdev, false);
- if (ret) {
- if (ret < 0) {
- error_report("vfio: Error: Failed to setup MSI fds: %m");
- } else if (ret != vdev->nr_vectors) {
- error_report("vfio: Error: Failed to enable %d "
- "MSI vectors, retry with %d", vdev->nr_vectors, ret);
- }
-
- for (i = 0; i < vdev->nr_vectors; i++) {
- VFIOMSIVector *vector = &vdev->msi_vectors[i];
- if (vector->virq >= 0) {
- vfio_remove_kvm_msi_virq(vector);
- }
- qemu_set_fd_handler(event_notifier_get_fd(&vector->interrupt),
- NULL, NULL, NULL);
- event_notifier_cleanup(&vector->interrupt);
- }
-
- g_free(vdev->msi_vectors);
-
- if (ret > 0 && ret != vdev->nr_vectors) {
- vdev->nr_vectors = ret;
- goto retry;
- }
- vdev->nr_vectors = 0;
-
- /*
- * Failing to setup MSI doesn't really fall within any specification.
- * Let's try leaving interrupts disabled and hope the guest figures
- * out to fall back to INTx for this device.
- */
- error_report("vfio: Error: Failed to enable MSI");
- vdev->interrupt = VFIO_INT_NONE;
-
- return;
- }
-
- trace_vfio_enable_msi(vdev->host.domain, vdev->host.bus,
- vdev->host.slot, vdev->host.function,
- vdev->nr_vectors);
-}
-
-static void vfio_disable_msi_common(VFIODevice *vdev)
-{
- int i;
-
- for (i = 0; i < vdev->nr_vectors; i++) {
- VFIOMSIVector *vector = &vdev->msi_vectors[i];
- if (vdev->msi_vectors[i].use) {
- if (vector->virq >= 0) {
- vfio_remove_kvm_msi_virq(vector);
- }
- qemu_set_fd_handler(event_notifier_get_fd(&vector->interrupt),
- NULL, NULL, NULL);
- event_notifier_cleanup(&vector->interrupt);
- }
- }
-
- g_free(vdev->msi_vectors);
- vdev->msi_vectors = NULL;
- vdev->nr_vectors = 0;
- vdev->interrupt = VFIO_INT_NONE;
-
- vfio_enable_intx(vdev);
-}
-
-static void vfio_disable_msix(VFIODevice *vdev)
-{
- int i;
-
- msix_unset_vector_notifiers(&vdev->pdev);
-
- /*
- * MSI-X will only release vectors if MSI-X is still enabled on the
- * device, check through the rest and release it ourselves if necessary.
- */
- for (i = 0; i < vdev->nr_vectors; i++) {
- if (vdev->msi_vectors[i].use) {
- vfio_msix_vector_release(&vdev->pdev, i);
- msix_vector_unuse(&vdev->pdev, i);
- }
- }
-
- if (vdev->nr_vectors) {
- vfio_disable_irqindex(vdev, VFIO_PCI_MSIX_IRQ_INDEX);
- }
-
- vfio_disable_msi_common(vdev);
-
- trace_vfio_disable_msix(vdev->host.domain, vdev->host.bus,
- vdev->host.slot, vdev->host.function);
-}
-
-static void vfio_disable_msi(VFIODevice *vdev)
-{
- vfio_disable_irqindex(vdev, VFIO_PCI_MSI_IRQ_INDEX);
- vfio_disable_msi_common(vdev);
-
- trace_vfio_disable_msi(vdev->host.domain, vdev->host.bus,
- vdev->host.slot, vdev->host.function);
-}
-
-static void vfio_update_msi(VFIODevice *vdev)
-{
- int i;
-
- for (i = 0; i < vdev->nr_vectors; i++) {
- VFIOMSIVector *vector = &vdev->msi_vectors[i];
- MSIMessage msg;
-
- if (!vector->use || vector->virq < 0) {
- continue;
- }
-
- msg = msi_get_message(&vdev->pdev, i);
- vfio_update_kvm_msi_virq(vector, msg);
- }
-}
-
-/*
- * IO Port/MMIO - Beware of the endians, VFIO is always little endian
- */
-static void vfio_bar_write(void *opaque, hwaddr addr,
- uint64_t data, unsigned size)
-{
- VFIOBAR *bar = opaque;
- union {
- uint8_t byte;
- uint16_t word;
- uint32_t dword;
- uint64_t qword;
- } buf;
-
- switch (size) {
- case 1:
- buf.byte = data;
- break;
- case 2:
- buf.word = cpu_to_le16(data);
- break;
- case 4:
- buf.dword = cpu_to_le32(data);
- break;
- default:
- hw_error("vfio: unsupported write size, %d bytes", size);
- break;
- }
-
- if (pwrite(bar->fd, &buf, size, bar->fd_offset + addr) != size) {
- error_report("%s(,0x%"HWADDR_PRIx", 0x%"PRIx64", %d) failed: %m",
- __func__, addr, data, size);
- }
-
-#ifdef DEBUG_VFIO
- {
- VFIODevice *vdev = container_of(bar, VFIODevice, bars[bar->nr]);
-
- trace_vfio_bar_write(vdev->host.domain, vdev->host.bus,
- vdev->host.slot, vdev->host.function,
- region->nr, addr, data, size);
- }
-#endif
-
- /*
- * A read or write to a BAR always signals an INTx EOI. This will
- * do nothing if not pending (including not in INTx mode). We assume
- * that a BAR access is in response to an interrupt and that BAR
- * accesses will service the interrupt. Unfortunately, we don't know
- * which access will service the interrupt, so we're potentially
- * getting quite a few host interrupts per guest interrupt.
- */
- vfio_eoi(container_of(bar, VFIODevice, bars[bar->nr]));
-}
-
-static uint64_t vfio_bar_read(void *opaque,
- hwaddr addr, unsigned size)
-{
- VFIOBAR *bar = opaque;
- union {
- uint8_t byte;
- uint16_t word;
- uint32_t dword;
- uint64_t qword;
- } buf;
- uint64_t data = 0;
-
- if (pread(bar->fd, &buf, size, bar->fd_offset + addr) != size) {
- error_report("%s(,0x%"HWADDR_PRIx", %d) failed: %m",
- __func__, addr, size);
- return (uint64_t)-1;
- }
-
- switch (size) {
- case 1:
- data = buf.byte;
- break;
- case 2:
- data = le16_to_cpu(buf.word);
- break;
- case 4:
- data = le32_to_cpu(buf.dword);
- break;
- default:
- hw_error("vfio: unsupported read size, %d bytes", size);
- break;
- }
-
-#ifdef DEBUG_VFIO
- {
- VFIODevice *vdev = container_of(bar, VFIODevice, bars[bar->nr]);
-
- trace_vfio_bar_read(vdev->host.domain, vdev->host.bus,
- vdev->host.slot, vdev->host.function,
- region->nr, addr, size, data);
- }
-#endif
-
- /* Same as write above */
- vfio_eoi(container_of(bar, VFIODevice, bars[bar->nr]));
-
- return data;
-}
-
-static const MemoryRegionOps vfio_bar_ops = {
- .read = vfio_bar_read,
- .write = vfio_bar_write,
- .endianness = DEVICE_LITTLE_ENDIAN,
-};
-
-static void vfio_pci_load_rom(VFIODevice *vdev)
-{
- struct vfio_region_info reg_info = {
- .argsz = sizeof(reg_info),
- .index = VFIO_PCI_ROM_REGION_INDEX
- };
- uint64_t size;
- off_t off = 0;
- size_t bytes;
-
- if (ioctl(vdev->fd, VFIO_DEVICE_GET_REGION_INFO, ®_info)) {
- error_report("vfio: Error getting ROM info: %m");
- return;
- }
-
- trace_vfio_pci_load_rom(vdev->host.domain, vdev->host.bus,
- vdev->host.slot, vdev->host.function,
- (unsigned long)reg_info.size,
- (unsigned long)reg_info.offset,
- (unsigned long)reg_info.flags);
-
- vdev->rom_size = size = reg_info.size;
- vdev->rom_offset = reg_info.offset;
-
- if (!vdev->rom_size) {
- vdev->rom_read_failed = true;
- error_report("vfio-pci: Cannot read device rom at "
- "%04x:%02x:%02x.%x",
- vdev->host.domain, vdev->host.bus, vdev->host.slot,
- vdev->host.function);
- error_printf("Device option ROM contents are probably invalid "
- "(check dmesg).\nSkip option ROM probe with rombar=0, "
- "or load from file with romfile=\n");
- return;
- }
-
- vdev->rom = g_malloc(size);
- memset(vdev->rom, 0xff, size);
-
- while (size) {
- bytes = pread(vdev->fd, vdev->rom + off, size, vdev->rom_offset + off);
- if (bytes == 0) {
- break;
- } else if (bytes > 0) {
- off += bytes;
- size -= bytes;
- } else {
- if (errno == EINTR || errno == EAGAIN) {
- continue;
- }
- error_report("vfio: Error reading device ROM: %m");
- break;
- }
- }
-}
-
-static uint64_t vfio_rom_read(void *opaque, hwaddr addr, unsigned size)
-{
- VFIODevice *vdev = opaque;
- union {
- uint8_t byte;
- uint16_t word;
- uint32_t dword;
- uint64_t qword;
- } val;
- uint64_t data = 0;
-
- /* Load the ROM lazily when the guest tries to read it */
- if (unlikely(!vdev->rom && !vdev->rom_read_failed)) {
- vfio_pci_load_rom(vdev);
- }
-
- memcpy(&val, vdev->rom + addr,
- (addr < vdev->rom_size) ? MIN(size, vdev->rom_size - addr) : 0);
-
- switch (size) {
- case 1:
- data = val.byte;
- break;
- case 2:
- data = le16_to_cpu(val.word);
- break;
- case 4:
- data = le32_to_cpu(val.dword);
- break;
- default:
- hw_error("vfio: unsupported read size, %d bytes\n", size);
- break;
- }
-
- trace_vfio_rom_read(vdev->host.domain, vdev->host.bus,
- vdev->host.slot, vdev->host.function,
- addr, size, data);
-
- return data;
-}
-
-static void vfio_rom_write(void *opaque, hwaddr addr,
- uint64_t data, unsigned size)
-{
-}
-
-static const MemoryRegionOps vfio_rom_ops = {
- .read = vfio_rom_read,
- .write = vfio_rom_write,
- .endianness = DEVICE_LITTLE_ENDIAN,
-};
-
-static bool vfio_blacklist_opt_rom(VFIODevice *vdev)
-{
- PCIDevice *pdev = &vdev->pdev;
- uint16_t vendor_id, device_id;
- int count = 0;
-
- vendor_id = pci_get_word(pdev->config + PCI_VENDOR_ID);
- device_id = pci_get_word(pdev->config + PCI_DEVICE_ID);
-
- while (count < ARRAY_SIZE(romblacklist)) {
- if (romblacklist[count].vendor_id == vendor_id &&
- romblacklist[count].device_id == device_id) {
- return true;
- }
- count++;
- }
-
- return false;
-}
-
-static void vfio_pci_size_rom(VFIODevice *vdev)
-{
- uint32_t orig, size = cpu_to_le32((uint32_t)PCI_ROM_ADDRESS_MASK);
- off_t offset = vdev->config_offset + PCI_ROM_ADDRESS;
- DeviceState *dev = DEVICE(vdev);
- char name[32];
-
- if (vdev->pdev.romfile || !vdev->pdev.rom_bar) {
- /* Since pci handles romfile, just print a message and return */
- if (vfio_blacklist_opt_rom(vdev) && vdev->pdev.romfile) {
- error_printf("Warning : Device at %04x:%02x:%02x.%x "
- "is known to cause system instability issues during "
- "option rom execution. "
- "Proceeding anyway since user specified romfile\n",
- vdev->host.domain, vdev->host.bus, vdev->host.slot,
- vdev->host.function);
- }
- return;
- }
-
- /*
- * Use the same size ROM BAR as the physical device. The contents
- * will get filled in later when the guest tries to read it.
- */
- if (pread(vdev->fd, &orig, 4, offset) != 4 ||
- pwrite(vdev->fd, &size, 4, offset) != 4 ||
- pread(vdev->fd, &size, 4, offset) != 4 ||
- pwrite(vdev->fd, &orig, 4, offset) != 4) {
- error_report("%s(%04x:%02x:%02x.%x) failed: %m",
- __func__, vdev->host.domain, vdev->host.bus,
- vdev->host.slot, vdev->host.function);
- return;
- }
-
- size = ~(le32_to_cpu(size) & PCI_ROM_ADDRESS_MASK) + 1;
-
- if (!size) {
- return;
- }
-
- if (vfio_blacklist_opt_rom(vdev)) {
- if (dev->opts && qemu_opt_get(dev->opts, "rombar")) {
- error_printf("Warning : Device at %04x:%02x:%02x.%x "
- "is known to cause system instability issues during "
- "option rom execution. "
- "Proceeding anyway since user specified non zero value for "
- "rombar\n",
- vdev->host.domain, vdev->host.bus, vdev->host.slot,
- vdev->host.function);
- } else {
- error_printf("Warning : Rom loading for device at "
- "%04x:%02x:%02x.%x has been disabled due to "
- "system instability issues. "
- "Specify rombar=1 or romfile to force\n",
- vdev->host.domain, vdev->host.bus, vdev->host.slot,
- vdev->host.function);
- return;
- }
- }
-
- trace_vfio_pci_size_rom(vdev->host.domain, vdev->host.bus,
- vdev->host.slot, vdev->host.function,
- size);
-
- snprintf(name, sizeof(name), "vfio[%04x:%02x:%02x.%x].rom",
- vdev->host.domain, vdev->host.bus, vdev->host.slot,
- vdev->host.function);
-
- memory_region_init_io(&vdev->pdev.rom, OBJECT(vdev),
- &vfio_rom_ops, vdev, name, size);
-
- pci_register_bar(&vdev->pdev, PCI_ROM_SLOT,
- PCI_BASE_ADDRESS_SPACE_MEMORY, &vdev->pdev.rom);
-
- vdev->pdev.has_rom = true;
- vdev->rom_read_failed = false;
-}
-
-static void vfio_vga_write(void *opaque, hwaddr addr,
- uint64_t data, unsigned size)
-{
- VFIOVGARegion *region = opaque;
- VFIOVGA *vga = container_of(region, VFIOVGA, region[region->nr]);
- union {
- uint8_t byte;
- uint16_t word;
- uint32_t dword;
- uint64_t qword;
- } buf;
- off_t offset = vga->fd_offset + region->offset + addr;
-
- switch (size) {
- case 1:
- buf.byte = data;
- break;
- case 2:
- buf.word = cpu_to_le16(data);
- break;
- case 4:
- buf.dword = cpu_to_le32(data);
- break;
- default:
- hw_error("vfio: unsupported write size, %d bytes", size);
- break;
- }
-
- if (pwrite(vga->fd, &buf, size, offset) != size) {
- error_report("%s(,0x%"HWADDR_PRIx", 0x%"PRIx64", %d) failed: %m",
- __func__, region->offset + addr, data, size);
- }
-
- trace_vfio_vga_write(region->offset + addr, data, size);
-}
-
-static uint64_t vfio_vga_read(void *opaque, hwaddr addr, unsigned size)
-{
- VFIOVGARegion *region = opaque;
- VFIOVGA *vga = container_of(region, VFIOVGA, region[region->nr]);
- union {
- uint8_t byte;
- uint16_t word;
- uint32_t dword;
- uint64_t qword;
- } buf;
- uint64_t data = 0;
- off_t offset = vga->fd_offset + region->offset + addr;
-
- if (pread(vga->fd, &buf, size, offset) != size) {
- error_report("%s(,0x%"HWADDR_PRIx", %d) failed: %m",
- __func__, region->offset + addr, size);
- return (uint64_t)-1;
- }
-
- switch (size) {
- case 1:
- data = buf.byte;
- break;
- case 2:
- data = le16_to_cpu(buf.word);
- break;
- case 4:
- data = le32_to_cpu(buf.dword);
- break;
- default:
- hw_error("vfio: unsupported read size, %d bytes", size);
- break;
- }
-
- trace_vfio_vga_read(region->offset + addr, size, data);
-
- return data;
-}
-
-static const MemoryRegionOps vfio_vga_ops = {
- .read = vfio_vga_read,
- .write = vfio_vga_write,
- .endianness = DEVICE_LITTLE_ENDIAN,
-};
-
-/*
- * Device specific quirks
- */
-
-/* Is range1 fully contained within range2? */
-static bool vfio_range_contained(uint64_t first1, uint64_t len1,
- uint64_t first2, uint64_t len2) {
- return (first1 >= first2 && first1 + len1 <= first2 + len2);
-}
-
-static bool vfio_flags_enabled(uint8_t flags, uint8_t mask)
-{
- return (mask && (flags & mask) == mask);
-}
-
-static uint64_t vfio_generic_window_quirk_read(void *opaque,
- hwaddr addr, unsigned size)
-{
- VFIOQuirk *quirk = opaque;
- VFIODevice *vdev = quirk->vdev;
- uint64_t data;
-
- if (vfio_flags_enabled(quirk->data.flags, quirk->data.read_flags) &&
- ranges_overlap(addr, size,
- quirk->data.data_offset, quirk->data.data_size)) {
- hwaddr offset = addr - quirk->data.data_offset;
-
- if (!vfio_range_contained(addr, size, quirk->data.data_offset,
- quirk->data.data_size)) {
- hw_error("%s: window data read not fully contained: %s",
- __func__, memory_region_name(&quirk->mem));
- }
-
- data = vfio_pci_read_config(&vdev->pdev,
- quirk->data.address_val + offset, size);
-
- trace_vfio_generic_window_quirk_read(memory_region_name(&quirk->mem),
- vdev->host.domain,
- vdev->host.bus,
- vdev->host.slot,
- vdev->host.function,
- quirk->data.bar,
- addr, size, data);
- } else {
- data = vfio_bar_read(&vdev->bars[quirk->data.bar],
- addr + quirk->data.base_offset, size);
- }
-
- return data;
-}
-
-static void vfio_generic_window_quirk_write(void *opaque, hwaddr addr,
- uint64_t data, unsigned size)
-{
- VFIOQuirk *quirk = opaque;
- VFIODevice *vdev = quirk->vdev;
-
- if (ranges_overlap(addr, size,
- quirk->data.address_offset, quirk->data.address_size)) {
-
- if (addr != quirk->data.address_offset) {
- hw_error("%s: offset write into address window: %s",
- __func__, memory_region_name(&quirk->mem));
- }
-
- if ((data & ~quirk->data.address_mask) == quirk->data.address_match) {
- quirk->data.flags |= quirk->data.write_flags |
- quirk->data.read_flags;
- quirk->data.address_val = data & quirk->data.address_mask;
- } else {
- quirk->data.flags &= ~(quirk->data.write_flags |
- quirk->data.read_flags);
- }
- }
-
- if (vfio_flags_enabled(quirk->data.flags, quirk->data.write_flags) &&
- ranges_overlap(addr, size,
- quirk->data.data_offset, quirk->data.data_size)) {
- hwaddr offset = addr - quirk->data.data_offset;
-
- if (!vfio_range_contained(addr, size, quirk->data.data_offset,
- quirk->data.data_size)) {
- hw_error("%s: window data write not fully contained: %s",
- __func__, memory_region_name(&quirk->mem));
- }
-
- vfio_pci_write_config(&vdev->pdev,
- quirk->data.address_val + offset, data, size);
-
- trace_vfio_generic_window_quirk_write(memory_region_name(&quirk->mem),
- vdev->host.domain,
- vdev->host.bus,
- vdev->host.slot,
- vdev->host.function,
- quirk->data.bar,
- addr, data, size);
- return;
- }
-
- vfio_bar_write(&vdev->bars[quirk->data.bar],
- addr + quirk->data.base_offset, data, size);
-}
-
-static const MemoryRegionOps vfio_generic_window_quirk = {
- .read = vfio_generic_window_quirk_read,
- .write = vfio_generic_window_quirk_write,
- .endianness = DEVICE_LITTLE_ENDIAN,
-};
-
-static uint64_t vfio_generic_quirk_read(void *opaque,
- hwaddr addr, unsigned size)
-{
- VFIOQuirk *quirk = opaque;
- VFIODevice *vdev = quirk->vdev;
- hwaddr base = quirk->data.address_match & TARGET_PAGE_MASK;
- hwaddr offset = quirk->data.address_match & ~TARGET_PAGE_MASK;
- uint64_t data;
-
- if (vfio_flags_enabled(quirk->data.flags, quirk->data.read_flags) &&
- ranges_overlap(addr, size, offset, quirk->data.address_mask + 1)) {
- if (!vfio_range_contained(addr, size, offset,
- quirk->data.address_mask + 1)) {
- hw_error("%s: read not fully contained: %s",
- __func__, memory_region_name(&quirk->mem));
- }
-
- data = vfio_pci_read_config(&vdev->pdev, addr - offset, size);
-
- trace_vfio_generic_quirk_read(memory_region_name(&quirk->mem),
- vdev->host.domain,
- vdev->host.bus,
- vdev->host.slot,
- vdev->host.function,
- quirk->data.bar,
- addr + base, size, data);
- } else {
- data = vfio_bar_read(&vdev->bars[quirk->data.bar], addr + base, size);
- }
-
- return data;
-}
-
-static void vfio_generic_quirk_write(void *opaque, hwaddr addr,
- uint64_t data, unsigned size)
-{
- VFIOQuirk *quirk = opaque;
- VFIODevice *vdev = quirk->vdev;
- hwaddr base = quirk->data.address_match & TARGET_PAGE_MASK;
- hwaddr offset = quirk->data.address_match & ~TARGET_PAGE_MASK;
-
- if (vfio_flags_enabled(quirk->data.flags, quirk->data.write_flags) &&
- ranges_overlap(addr, size, offset, quirk->data.address_mask + 1)) {
- if (!vfio_range_contained(addr, size, offset,
- quirk->data.address_mask + 1)) {
- hw_error("%s: write not fully contained: %s",
- __func__, memory_region_name(&quirk->mem));
- }
-
- vfio_pci_write_config(&vdev->pdev, addr - offset, data, size);
-
- trace_vfio_generic_quirk_write(memory_region_name(&quirk->mem),
- vdev->host.domain,
- vdev->host.bus,
- vdev->host.slot,
- vdev->host.function,
- quirk->data.bar,
- addr + base, data, size);
- } else {
- vfio_bar_write(&vdev->bars[quirk->data.bar], addr + base, data, size);
- }
-}
-
-static const MemoryRegionOps vfio_generic_quirk = {
- .read = vfio_generic_quirk_read,
- .write = vfio_generic_quirk_write,
- .endianness = DEVICE_LITTLE_ENDIAN,
-};
-
-#define PCI_VENDOR_ID_ATI 0x1002
-
-/*
- * Radeon HD cards (HD5450 & HD7850) report the upper byte of the I/O port BAR
- * through VGA register 0x3c3. On newer cards, the I/O port BAR is always
- * BAR4 (older cards like the X550 used BAR1, but we don't care to support
- * those). Note that on bare metal, a read of 0x3c3 doesn't always return the
- * I/O port BAR address. Originally this was coded to return the virtual BAR
- * address only if the physical register read returns the actual BAR address,
- * but users have reported greater success if we return the virtual address
- * unconditionally.
- */
-static uint64_t vfio_ati_3c3_quirk_read(void *opaque,
- hwaddr addr, unsigned size)
-{
- VFIOQuirk *quirk = opaque;
- VFIODevice *vdev = quirk->vdev;
- uint64_t data = vfio_pci_read_config(&vdev->pdev,
- PCI_BASE_ADDRESS_0 + (4 * 4) + 1,
- size);
- trace_vfio_ati_3c3_quirk_read(data);
-
- return data;
-}
-
-static const MemoryRegionOps vfio_ati_3c3_quirk = {
- .read = vfio_ati_3c3_quirk_read,
- .endianness = DEVICE_LITTLE_ENDIAN,
-};
-
-static void vfio_vga_probe_ati_3c3_quirk(VFIODevice *vdev)
-{
- PCIDevice *pdev = &vdev->pdev;
- VFIOQuirk *quirk;
-
- if (pci_get_word(pdev->config + PCI_VENDOR_ID) != PCI_VENDOR_ID_ATI) {
- return;
- }
-
- /*
- * As long as the BAR is >= 256 bytes it will be aligned such that the
- * lower byte is always zero. Filter out anything else, if it exists.
- */
- if (!vdev->bars[4].ioport || vdev->bars[4].size < 256) {
- return;
- }
-
- quirk = g_malloc0(sizeof(*quirk));
- quirk->vdev = vdev;
-
- memory_region_init_io(&quirk->mem, OBJECT(vdev), &vfio_ati_3c3_quirk, quirk,
- "vfio-ati-3c3-quirk", 1);
- memory_region_add_subregion(&vdev->vga.region[QEMU_PCI_VGA_IO_HI].mem,
- 3 /* offset 3 bytes from 0x3c0 */, &quirk->mem);
-
- QLIST_INSERT_HEAD(&vdev->vga.region[QEMU_PCI_VGA_IO_HI].quirks,
- quirk, next);
-
- trace_vfio_vga_probe_ati_3c3_quirk(vdev->host.domain, vdev->host.bus,
- vdev->host.slot, vdev->host.function);
-}
-
-/*
- * Newer ATI/AMD devices, including HD5450 and HD7850, have a window to PCI
- * config space through MMIO BAR2 at offset 0x4000. Nothing seems to access
- * the MMIO space directly, but a window to this space is provided through
- * I/O port BAR4. Offset 0x0 is the address register and offset 0x4 is the
- * data register. When the address is programmed to a range of 0x4000-0x4fff
- * PCI configuration space is available. Experimentation seems to indicate
- * that only read-only access is provided, but we drop writes when the window
- * is enabled to config space nonetheless.
- */
-static void vfio_probe_ati_bar4_window_quirk(VFIODevice *vdev, int nr)
-{
- PCIDevice *pdev = &vdev->pdev;
- VFIOQuirk *quirk;
-
- if (!vdev->has_vga || nr != 4 ||
- pci_get_word(pdev->config + PCI_VENDOR_ID) != PCI_VENDOR_ID_ATI) {
- return;
- }
-
- quirk = g_malloc0(sizeof(*quirk));
- quirk->vdev = vdev;
- quirk->data.address_size = 4;
- quirk->data.data_offset = 4;
- quirk->data.data_size = 4;
- quirk->data.address_match = 0x4000;
- quirk->data.address_mask = PCIE_CONFIG_SPACE_SIZE - 1;
- quirk->data.bar = nr;
- quirk->data.read_flags = quirk->data.write_flags = 1;
-
- memory_region_init_io(&quirk->mem, OBJECT(vdev),
- &vfio_generic_window_quirk, quirk,
- "vfio-ati-bar4-window-quirk", 8);
- memory_region_add_subregion_overlap(&vdev->bars[nr].mem,
- quirk->data.base_offset, &quirk->mem, 1);
-
- QLIST_INSERT_HEAD(&vdev->bars[nr].quirks, quirk, next);
-
- trace_vfio_probe_ati_bar4_window_quirk(vdev->host.domain,
- vdev->host.bus,
- vdev->host.slot,
- vdev->host.function);
-}
-
-#define PCI_VENDOR_ID_REALTEK 0x10ec
-
-/*
- * RTL8168 devices have a backdoor that can access the MSI-X table. At BAR2
- * offset 0x70 there is a dword data register, offset 0x74 is a dword address
- * register. According to the Linux r8169 driver, the MSI-X table is addressed
- * when the "type" portion of the address register is set to 0x1. This appears
- * to be bits 16:30. Bit 31 is both a write indicator and some sort of
- * "address latched" indicator. Bits 12:15 are a mask field, which we can
- * ignore because the MSI-X table should always be accessed as a dword (full
- * mask). Bits 0:11 is offset within the type.
- *
- * Example trace:
- *
- * Read from MSI-X table offset 0
- * vfio: vfio_bar_write(0000:05:00.0:BAR2+0x74, 0x1f000, 4) // store read addr
- * vfio: vfio_bar_read(0000:05:00.0:BAR2+0x74, 4) = 0x8001f000 // latch
- * vfio: vfio_bar_read(0000:05:00.0:BAR2+0x70, 4) = 0xfee00398 // read data
- *
- * Write 0xfee00000 to MSI-X table offset 0
- * vfio: vfio_bar_write(0000:05:00.0:BAR2+0x70, 0xfee00000, 4) // write data
- * vfio: vfio_bar_write(0000:05:00.0:BAR2+0x74, 0x8001f000, 4) // do write
- * vfio: vfio_bar_read(0000:05:00.0:BAR2+0x74, 4) = 0x1f000 // complete
- */
-
-static uint64_t vfio_rtl8168_window_quirk_read(void *opaque,
- hwaddr addr, unsigned size)
-{
- VFIOQuirk *quirk = opaque;
- VFIODevice *vdev = quirk->vdev;
-
- switch (addr) {
- case 4: /* address */
- if (quirk->data.flags) {
- trace_vfio_rtl8168_window_quirk_read_fake(
- memory_region_name(&quirk->mem),
- vdev->host.domain, vdev->host.bus,
- vdev->host.slot, vdev->host.function);
-
- return quirk->data.address_match ^ 0x10000000U;
- }
- break;
- case 0: /* data */
- if (quirk->data.flags) {
- uint64_t val;
-
- trace_vfio_rtl8168_window_quirk_read_table(
- memory_region_name(&quirk->mem),
- vdev->host.domain, vdev->host.bus,
- vdev->host.slot, vdev->host.function
- );
-
- if (!(vdev->pdev.cap_present & QEMU_PCI_CAP_MSIX)) {
- return 0;
- }
-
- io_mem_read(&vdev->pdev.msix_table_mmio,
- (hwaddr)(quirk->data.address_match & 0xfff),
- &val, size);
- return val;
- }
- }
-
- trace_vfio_rtl8168_window_quirk_read_direct(
- memory_region_name(&quirk->mem),
- vdev->host.domain, vdev->host.bus,
- vdev->host.slot, vdev->host.function);
-
- return vfio_bar_read(&vdev->bars[quirk->data.bar], addr + 0x70, size);
-}
-
-static void vfio_rtl8168_window_quirk_write(void *opaque, hwaddr addr,
- uint64_t data, unsigned size)
-{
- VFIOQuirk *quirk = opaque;
- VFIODevice *vdev = quirk->vdev;
-
- switch (addr) {
- case 4: /* address */
- if ((data & 0x7fff0000) == 0x10000) {
- if (data & 0x10000000U &&
- vdev->pdev.cap_present & QEMU_PCI_CAP_MSIX) {
-
- trace_vfio_rtl8168_window_quirk_write_table(
- memory_region_name(&quirk->mem),
- vdev->host.domain, vdev->host.bus,
- vdev->host.slot, vdev->host.function);
-
- io_mem_write(&vdev->pdev.msix_table_mmio,
- (hwaddr)(quirk->data.address_match & 0xfff),
- data, size);
- }
-
- quirk->data.flags = 1;
- quirk->data.address_match = data;
-
- return;
- }
- quirk->data.flags = 0;
- break;
- case 0: /* data */
- quirk->data.address_mask = data;
- break;
- }
-
- trace_vfio_rtl8168_window_quirk_write_direct(
- memory_region_name(&quirk->mem),
- vdev->host.domain, vdev->host.bus,
- vdev->host.slot, vdev->host.function);
-
- vfio_bar_write(&vdev->bars[quirk->data.bar], addr + 0x70, data, size);
-}
-
-static const MemoryRegionOps vfio_rtl8168_window_quirk = {
- .read = vfio_rtl8168_window_quirk_read,
- .write = vfio_rtl8168_window_quirk_write,
- .valid = {
- .min_access_size = 4,
- .max_access_size = 4,
- .unaligned = false,
- },
- .endianness = DEVICE_LITTLE_ENDIAN,
-};
-
-static void vfio_probe_rtl8168_bar2_window_quirk(VFIODevice *vdev, int nr)
-{
- PCIDevice *pdev = &vdev->pdev;
- VFIOQuirk *quirk;
-
- if (pci_get_word(pdev->config + PCI_VENDOR_ID) != PCI_VENDOR_ID_REALTEK ||
- pci_get_word(pdev->config + PCI_DEVICE_ID) != 0x8168 || nr != 2) {
- return;
- }
-
- quirk = g_malloc0(sizeof(*quirk));
- quirk->vdev = vdev;
- quirk->data.bar = nr;
-
- memory_region_init_io(&quirk->mem, OBJECT(vdev), &vfio_rtl8168_window_quirk,
- quirk, "vfio-rtl8168-window-quirk", 8);
- memory_region_add_subregion_overlap(&vdev->bars[nr].mem,
- 0x70, &quirk->mem, 1);
-
- QLIST_INSERT_HEAD(&vdev->bars[nr].quirks, quirk, next);
-
- trace_vfio_probe_rtl8168_bar2_window_quirk(vdev->host.domain,
- vdev->host.bus,
- vdev->host.slot,
- vdev->host.function);
-}
-/*
- * Trap the BAR2 MMIO window to config space as well.
- */
-static void vfio_probe_ati_bar2_4000_quirk(VFIODevice *vdev, int nr)
-{
- PCIDevice *pdev = &vdev->pdev;
- VFIOQuirk *quirk;
-
- /* Only enable on newer devices where BAR2 is 64bit */
- if (!vdev->has_vga || nr != 2 || !vdev->bars[2].mem64 ||
- pci_get_word(pdev->config + PCI_VENDOR_ID) != PCI_VENDOR_ID_ATI) {
- return;
- }
-
- quirk = g_malloc0(sizeof(*quirk));
- quirk->vdev = vdev;
- quirk->data.flags = quirk->data.read_flags = quirk->data.write_flags = 1;
- quirk->data.address_match = 0x4000;
- quirk->data.address_mask = PCIE_CONFIG_SPACE_SIZE - 1;
- quirk->data.bar = nr;
-
- memory_region_init_io(&quirk->mem, OBJECT(vdev), &vfio_generic_quirk, quirk,
- "vfio-ati-bar2-4000-quirk",
- TARGET_PAGE_ALIGN(quirk->data.address_mask + 1));
- memory_region_add_subregion_overlap(&vdev->bars[nr].mem,
- quirk->data.address_match & TARGET_PAGE_MASK,
- &quirk->mem, 1);
-
- QLIST_INSERT_HEAD(&vdev->bars[nr].quirks, quirk, next);
-
- trace_vfio_probe_ati_bar2_4000_quirk(vdev->host.domain,
- vdev->host.bus,
- vdev->host.slot,
- vdev->host.function);
-}
-
-/*
- * Older ATI/AMD cards like the X550 have a similar window to that above.
- * I/O port BAR1 provides a window to a mirror of PCI config space located
- * in BAR2 at offset 0xf00. We don't care to support such older cards, but
- * note it for future reference.
- */
-
-#define PCI_VENDOR_ID_NVIDIA 0x10de
-
-/*
- * Nvidia has several different methods to get to config space, the
- * nouveu project has several of these documented here:
- * https://github.com/pathscale/envytools/tree/master/hwdocs
- *
- * The first quirk is actually not documented in envytools and is found
- * on 10de:01d1 (NVIDIA Corporation G72 [GeForce 7300 LE]). This is an
- * NV46 chipset. The backdoor uses the legacy VGA I/O ports to access
- * the mirror of PCI config space found at BAR0 offset 0x1800. The access
- * sequence first writes 0x338 to I/O port 0x3d4. The target offset is
- * then written to 0x3d0. Finally 0x538 is written for a read and 0x738
- * is written for a write to 0x3d4. The BAR0 offset is then accessible
- * through 0x3d0. This quirk doesn't seem to be necessary on newer cards
- * that use the I/O port BAR5 window but it doesn't hurt to leave it.
- */
-enum {
- NV_3D0_NONE = 0,
- NV_3D0_SELECT,
- NV_3D0_WINDOW,
- NV_3D0_READ,
- NV_3D0_WRITE,
-};
-
-static uint64_t vfio_nvidia_3d0_quirk_read(void *opaque,
- hwaddr addr, unsigned size)
-{
- VFIOQuirk *quirk = opaque;
- VFIODevice *vdev = quirk->vdev;
- PCIDevice *pdev = &vdev->pdev;
- uint64_t data = vfio_vga_read(&vdev->vga.region[QEMU_PCI_VGA_IO_HI],
- addr + quirk->data.base_offset, size);
-
- if (quirk->data.flags == NV_3D0_READ && addr == quirk->data.data_offset) {
- data = vfio_pci_read_config(pdev, quirk->data.address_val, size);
- trace_vfio_nvidia_3d0_quirk_read(size, data);
- }
-
- quirk->data.flags = NV_3D0_NONE;
-
- return data;
-}
-
-static void vfio_nvidia_3d0_quirk_write(void *opaque, hwaddr addr,
- uint64_t data, unsigned size)
-{
- VFIOQuirk *quirk = opaque;
- VFIODevice *vdev = quirk->vdev;
- PCIDevice *pdev = &vdev->pdev;
-
- switch (quirk->data.flags) {
- case NV_3D0_NONE:
- if (addr == quirk->data.address_offset && data == 0x338) {
- quirk->data.flags = NV_3D0_SELECT;
- }
- break;
- case NV_3D0_SELECT:
- quirk->data.flags = NV_3D0_NONE;
- if (addr == quirk->data.data_offset &&
- (data & ~quirk->data.address_mask) == quirk->data.address_match) {
- quirk->data.flags = NV_3D0_WINDOW;
- quirk->data.address_val = data & quirk->data.address_mask;
- }
- break;
- case NV_3D0_WINDOW:
- quirk->data.flags = NV_3D0_NONE;
- if (addr == quirk->data.address_offset) {
- if (data == 0x538) {
- quirk->data.flags = NV_3D0_READ;
- } else if (data == 0x738) {
- quirk->data.flags = NV_3D0_WRITE;
- }
- }
- break;
- case NV_3D0_WRITE:
- quirk->data.flags = NV_3D0_NONE;
- if (addr == quirk->data.data_offset) {
- vfio_pci_write_config(pdev, quirk->data.address_val, data, size);
- trace_vfio_nvidia_3d0_quirk_write(data, size);
- return;
- }
- break;
- }
-
- vfio_vga_write(&vdev->vga.region[QEMU_PCI_VGA_IO_HI],
- addr + quirk->data.base_offset, data, size);
-}
-
-static const MemoryRegionOps vfio_nvidia_3d0_quirk = {
- .read = vfio_nvidia_3d0_quirk_read,
- .write = vfio_nvidia_3d0_quirk_write,
- .endianness = DEVICE_LITTLE_ENDIAN,
-};
-
-static void vfio_vga_probe_nvidia_3d0_quirk(VFIODevice *vdev)
-{
- PCIDevice *pdev = &vdev->pdev;
- VFIOQuirk *quirk;
-
- if (pci_get_word(pdev->config + PCI_VENDOR_ID) != PCI_VENDOR_ID_NVIDIA ||
- !vdev->bars[1].size) {
- return;
- }
-
- quirk = g_malloc0(sizeof(*quirk));
- quirk->vdev = vdev;
- quirk->data.base_offset = 0x10;
- quirk->data.address_offset = 4;
- quirk->data.address_size = 2;
- quirk->data.address_match = 0x1800;
- quirk->data.address_mask = PCI_CONFIG_SPACE_SIZE - 1;
- quirk->data.data_offset = 0;
- quirk->data.data_size = 4;
-
- memory_region_init_io(&quirk->mem, OBJECT(vdev), &vfio_nvidia_3d0_quirk,
- quirk, "vfio-nvidia-3d0-quirk", 6);
- memory_region_add_subregion(&vdev->vga.region[QEMU_PCI_VGA_IO_HI].mem,
- quirk->data.base_offset, &quirk->mem);
-
- QLIST_INSERT_HEAD(&vdev->vga.region[QEMU_PCI_VGA_IO_HI].quirks,
- quirk, next);
-
- trace_vfio_vga_probe_nvidia_3d0_quirk(vdev->host.domain,
- vdev->host.bus,
- vdev->host.slot,
- vdev->host.function);
-}
-
-/*
- * The second quirk is documented in envytools. The I/O port BAR5 is just
- * a set of address/data ports to the MMIO BARs. The BAR we care about is
- * again BAR0. This backdoor is apparently a bit newer than the one above
- * so we need to not only trap 256 bytes @0x1800, but all of PCI config
- * space, including extended space is available at the 4k @0x88000.
- */
-enum {
- NV_BAR5_ADDRESS = 0x1,
- NV_BAR5_ENABLE = 0x2,
- NV_BAR5_MASTER = 0x4,
- NV_BAR5_VALID = 0x7,
-};
-
-static void vfio_nvidia_bar5_window_quirk_write(void *opaque, hwaddr addr,
- uint64_t data, unsigned size)
-{
- VFIOQuirk *quirk = opaque;
-
- switch (addr) {
- case 0x0:
- if (data & 0x1) {
- quirk->data.flags |= NV_BAR5_MASTER;
- } else {
- quirk->data.flags &= ~NV_BAR5_MASTER;
- }
- break;
- case 0x4:
- if (data & 0x1) {
- quirk->data.flags |= NV_BAR5_ENABLE;
- } else {
- quirk->data.flags &= ~NV_BAR5_ENABLE;
- }
- break;
- case 0x8:
- if (quirk->data.flags & NV_BAR5_MASTER) {
- if ((data & ~0xfff) == 0x88000) {
- quirk->data.flags |= NV_BAR5_ADDRESS;
- quirk->data.address_val = data & 0xfff;
- } else if ((data & ~0xff) == 0x1800) {
- quirk->data.flags |= NV_BAR5_ADDRESS;
- quirk->data.address_val = data & 0xff;
- } else {
- quirk->data.flags &= ~NV_BAR5_ADDRESS;
- }
- }
- break;
- }
-
- vfio_generic_window_quirk_write(opaque, addr, data, size);
-}
-
-static const MemoryRegionOps vfio_nvidia_bar5_window_quirk = {
- .read = vfio_generic_window_quirk_read,
- .write = vfio_nvidia_bar5_window_quirk_write,
- .valid.min_access_size = 4,
- .endianness = DEVICE_LITTLE_ENDIAN,
-};
-
-static void vfio_probe_nvidia_bar5_window_quirk(VFIODevice *vdev, int nr)
-{
- PCIDevice *pdev = &vdev->pdev;
- VFIOQuirk *quirk;
-
- if (!vdev->has_vga || nr != 5 ||
- pci_get_word(pdev->config + PCI_VENDOR_ID) != PCI_VENDOR_ID_NVIDIA) {
- return;
- }
-
- quirk = g_malloc0(sizeof(*quirk));
- quirk->vdev = vdev;
- quirk->data.read_flags = quirk->data.write_flags = NV_BAR5_VALID;
- quirk->data.address_offset = 0x8;
- quirk->data.address_size = 0; /* actually 4, but avoids generic code */
- quirk->data.data_offset = 0xc;
- quirk->data.data_size = 4;
- quirk->data.bar = nr;
-
- memory_region_init_io(&quirk->mem, OBJECT(vdev),
- &vfio_nvidia_bar5_window_quirk, quirk,
- "vfio-nvidia-bar5-window-quirk", 16);
- memory_region_add_subregion_overlap(&vdev->bars[nr].mem, 0, &quirk->mem, 1);
-
- QLIST_INSERT_HEAD(&vdev->bars[nr].quirks, quirk, next);
-
- trace_vfio_probe_nvidia_bar5_window_quirk(vdev->host.domain,
- vdev->host.bus,
- vdev->host.slot,
- vdev->host.function);
-}
-
-static void vfio_nvidia_88000_quirk_write(void *opaque, hwaddr addr,
- uint64_t data, unsigned size)
-{
- VFIOQuirk *quirk = opaque;
- VFIODevice *vdev = quirk->vdev;
- PCIDevice *pdev = &vdev->pdev;
- hwaddr base = quirk->data.address_match & TARGET_PAGE_MASK;
-
- vfio_generic_quirk_write(opaque, addr, data, size);
-
- /*
- * Nvidia seems to acknowledge MSI interrupts by writing 0xff to the
- * MSI capability ID register. Both the ID and next register are
- * read-only, so we allow writes covering either of those to real hw.
- * NB - only fixed for the 0x88000 MMIO window.
- */
- if ((pdev->cap_present & QEMU_PCI_CAP_MSI) &&
- vfio_range_contained(addr, size, pdev->msi_cap, PCI_MSI_FLAGS)) {
- vfio_bar_write(&vdev->bars[quirk->data.bar], addr + base, data, size);
- }
-}
-
-static const MemoryRegionOps vfio_nvidia_88000_quirk = {
- .read = vfio_generic_quirk_read,
- .write = vfio_nvidia_88000_quirk_write,
- .endianness = DEVICE_LITTLE_ENDIAN,
-};
-
-/*
- * Finally, BAR0 itself. We want to redirect any accesses to either
- * 0x1800 or 0x88000 through the PCI config space access functions.
- *
- * NB - quirk at a page granularity or else they don't seem to work when
- * BARs are mmap'd
- *
- * Here's offset 0x88000...
- */
-static void vfio_probe_nvidia_bar0_88000_quirk(VFIODevice *vdev, int nr)
-{
- PCIDevice *pdev = &vdev->pdev;
- VFIOQuirk *quirk;
- uint16_t vendor, class;
-
- vendor = pci_get_word(pdev->config + PCI_VENDOR_ID);
- class = pci_get_word(pdev->config + PCI_CLASS_DEVICE);
-
- if (nr != 0 || vendor != PCI_VENDOR_ID_NVIDIA ||
- class != PCI_CLASS_DISPLAY_VGA) {
- return;
- }
-
- quirk = g_malloc0(sizeof(*quirk));
- quirk->vdev = vdev;
- quirk->data.flags = quirk->data.read_flags = quirk->data.write_flags = 1;
- quirk->data.address_match = 0x88000;
- quirk->data.address_mask = PCIE_CONFIG_SPACE_SIZE - 1;
- quirk->data.bar = nr;
-
- memory_region_init_io(&quirk->mem, OBJECT(vdev), &vfio_nvidia_88000_quirk,
- quirk, "vfio-nvidia-bar0-88000-quirk",
- TARGET_PAGE_ALIGN(quirk->data.address_mask + 1));
- memory_region_add_subregion_overlap(&vdev->bars[nr].mem,
- quirk->data.address_match & TARGET_PAGE_MASK,
- &quirk->mem, 1);
-
- QLIST_INSERT_HEAD(&vdev->bars[nr].quirks, quirk, next);
-
- trace_vfio_probe_nvidia_bar0_88000_quirk(vdev->host.domain,
- vdev->host.bus,
- vdev->host.slot,
- vdev->host.function);
-}
-
-/*
- * And here's the same for BAR0 offset 0x1800...
- */
-static void vfio_probe_nvidia_bar0_1800_quirk(VFIODevice *vdev, int nr)
-{
- PCIDevice *pdev = &vdev->pdev;
- VFIOQuirk *quirk;
-
- if (!vdev->has_vga || nr != 0 ||
- pci_get_word(pdev->config + PCI_VENDOR_ID) != PCI_VENDOR_ID_NVIDIA) {
- return;
- }
-
- /* Log the chipset ID */
- trace_vfio_probe_nvidia_bar0_1800_quirk_id(
- (unsigned int)(vfio_bar_read(&vdev->bars[0], 0, 4) >> 20) & 0xff);
-
- quirk = g_malloc0(sizeof(*quirk));
- quirk->vdev = vdev;
- quirk->data.flags = quirk->data.read_flags = quirk->data.write_flags = 1;
- quirk->data.address_match = 0x1800;
- quirk->data.address_mask = PCI_CONFIG_SPACE_SIZE - 1;
- quirk->data.bar = nr;
-
- memory_region_init_io(&quirk->mem, OBJECT(vdev), &vfio_generic_quirk, quirk,
- "vfio-nvidia-bar0-1800-quirk",
- TARGET_PAGE_ALIGN(quirk->data.address_mask + 1));
- memory_region_add_subregion_overlap(&vdev->bars[nr].mem,
- quirk->data.address_match & TARGET_PAGE_MASK,
- &quirk->mem, 1);
-
- QLIST_INSERT_HEAD(&vdev->bars[nr].quirks, quirk, next);
-
- trace_vfio_probe_nvidia_bar0_1800_quirk(vdev->host.domain,
- vdev->host.bus,
- vdev->host.slot,
- vdev->host.function);
-}
-
-/*
- * TODO - Some Nvidia devices provide config access to their companion HDA
- * device and even to their parent bridge via these config space mirrors.
- * Add quirks for those regions.
- */
-
-/*
- * Common quirk probe entry points.
- */
-static void vfio_vga_quirk_setup(VFIODevice *vdev)
-{
- vfio_vga_probe_ati_3c3_quirk(vdev);
- vfio_vga_probe_nvidia_3d0_quirk(vdev);
-}
-
-static void vfio_vga_quirk_teardown(VFIODevice *vdev)
-{
- int i;
-
- for (i = 0; i < ARRAY_SIZE(vdev->vga.region); i++) {
- while (!QLIST_EMPTY(&vdev->vga.region[i].quirks)) {
- VFIOQuirk *quirk = QLIST_FIRST(&vdev->vga.region[i].quirks);
- memory_region_del_subregion(&vdev->vga.region[i].mem, &quirk->mem);
- object_unparent(OBJECT(&quirk->mem));
- QLIST_REMOVE(quirk, next);
- g_free(quirk);
- }
- }
-}
-
-static void vfio_bar_quirk_setup(VFIODevice *vdev, int nr)
-{
- vfio_probe_ati_bar4_window_quirk(vdev, nr);
- vfio_probe_ati_bar2_4000_quirk(vdev, nr);
- vfio_probe_nvidia_bar5_window_quirk(vdev, nr);
- vfio_probe_nvidia_bar0_88000_quirk(vdev, nr);
- vfio_probe_nvidia_bar0_1800_quirk(vdev, nr);
- vfio_probe_rtl8168_bar2_window_quirk(vdev, nr);
-}
-
-static void vfio_bar_quirk_teardown(VFIODevice *vdev, int nr)
-{
- VFIOBAR *bar = &vdev->bars[nr];
-
- while (!QLIST_EMPTY(&bar->quirks)) {
- VFIOQuirk *quirk = QLIST_FIRST(&bar->quirks);
- memory_region_del_subregion(&bar->mem, &quirk->mem);
- object_unparent(OBJECT(&quirk->mem));
- QLIST_REMOVE(quirk, next);
- g_free(quirk);
- }
-}
-
-/*
- * PCI config space
- */
-static uint32_t vfio_pci_read_config(PCIDevice *pdev, uint32_t addr, int len)
-{
- VFIODevice *vdev = DO_UPCAST(VFIODevice, pdev, pdev);
- uint32_t emu_bits = 0, emu_val = 0, phys_val = 0, val;
-
- memcpy(&emu_bits, vdev->emulated_config_bits + addr, len);
- emu_bits = le32_to_cpu(emu_bits);
-
- if (emu_bits) {
- emu_val = pci_default_read_config(pdev, addr, len);
- }
-
- if (~emu_bits & (0xffffffffU >> (32 - len * 8))) {
- ssize_t ret;
-
- ret = pread(vdev->fd, &phys_val, len, vdev->config_offset + addr);
- if (ret != len) {
- error_report("%s(%04x:%02x:%02x.%x, 0x%x, 0x%x) failed: %m",
- __func__, vdev->host.domain, vdev->host.bus,
- vdev->host.slot, vdev->host.function, addr, len);
- return -errno;
- }
- phys_val = le32_to_cpu(phys_val);
- }
-
- val = (emu_val & emu_bits) | (phys_val & ~emu_bits);
-
- trace_vfio_pci_read_config(vdev->host.domain, vdev->host.bus,
- vdev->host.slot, vdev->host.function,
- addr, len, val);
-
- return val;
-}
-
-static void vfio_pci_write_config(PCIDevice *pdev, uint32_t addr,
- uint32_t val, int len)
-{
- VFIODevice *vdev = DO_UPCAST(VFIODevice, pdev, pdev);
- uint32_t val_le = cpu_to_le32(val);
-
- trace_vfio_pci_write_config(vdev->host.domain, vdev->host.bus,
- vdev->host.slot, vdev->host.function,
- addr, val, len);
-
- /* Write everything to VFIO, let it filter out what we can't write */
- if (pwrite(vdev->fd, &val_le, len, vdev->config_offset + addr) != len) {
- error_report("%s(%04x:%02x:%02x.%x, 0x%x, 0x%x, 0x%x) failed: %m",
- __func__, vdev->host.domain, vdev->host.bus,
- vdev->host.slot, vdev->host.function, addr, val, len);
- }
-
- /* MSI/MSI-X Enabling/Disabling */
- if (pdev->cap_present & QEMU_PCI_CAP_MSI &&
- ranges_overlap(addr, len, pdev->msi_cap, vdev->msi_cap_size)) {
- int is_enabled, was_enabled = msi_enabled(pdev);
-
- pci_default_write_config(pdev, addr, val, len);
-
- is_enabled = msi_enabled(pdev);
-
- if (!was_enabled) {
- if (is_enabled) {
- vfio_enable_msi(vdev);
- }
- } else {
- if (!is_enabled) {
- vfio_disable_msi(vdev);
- } else {
- vfio_update_msi(vdev);
- }
- }
- } else if (pdev->cap_present & QEMU_PCI_CAP_MSIX &&
- ranges_overlap(addr, len, pdev->msix_cap, MSIX_CAP_LENGTH)) {
- int is_enabled, was_enabled = msix_enabled(pdev);
-
- pci_default_write_config(pdev, addr, val, len);
-
- is_enabled = msix_enabled(pdev);
-
- if (!was_enabled && is_enabled) {
- vfio_enable_msix(vdev);
- } else if (was_enabled && !is_enabled) {
- vfio_disable_msix(vdev);
- }
- } else {
- /* Write everything to QEMU to keep emulated bits correct */
- pci_default_write_config(pdev, addr, val, len);
- }
-}
-
-/*
- * DMA - Mapping and unmapping for the "type1" IOMMU interface used on x86
- */
-static int vfio_dma_unmap(VFIOContainer *container,
- hwaddr iova, ram_addr_t size)
-{
- struct vfio_iommu_type1_dma_unmap unmap = {
- .argsz = sizeof(unmap),
- .flags = 0,
- .iova = iova,
- .size = size,
- };
-
- if (ioctl(container->fd, VFIO_IOMMU_UNMAP_DMA, &unmap)) {
- error_report("VFIO_UNMAP_DMA: %d\n", -errno);
- return -errno;
- }
-
- return 0;
-}
-
-static int vfio_dma_map(VFIOContainer *container, hwaddr iova,
- ram_addr_t size, void *vaddr, bool readonly)
-{
- struct vfio_iommu_type1_dma_map map = {
- .argsz = sizeof(map),
- .flags = VFIO_DMA_MAP_FLAG_READ,
- .vaddr = (__u64)(uintptr_t)vaddr,
- .iova = iova,
- .size = size,
- };
-
- if (!readonly) {
- map.flags |= VFIO_DMA_MAP_FLAG_WRITE;
- }
-
- /*
- * Try the mapping, if it fails with EBUSY, unmap the region and try
- * again. This shouldn't be necessary, but we sometimes see it in
- * the the VGA ROM space.
- */
- if (ioctl(container->fd, VFIO_IOMMU_MAP_DMA, &map) == 0 ||
- (errno == EBUSY && vfio_dma_unmap(container, iova, size) == 0 &&
- ioctl(container->fd, VFIO_IOMMU_MAP_DMA, &map) == 0)) {
- return 0;
- }
-
- error_report("VFIO_MAP_DMA: %d\n", -errno);
- return -errno;
-}
-
-static bool vfio_listener_skipped_section(MemoryRegionSection *section)
-{
- return (!memory_region_is_ram(section->mr) &&
- !memory_region_is_iommu(section->mr)) ||
- /*
- * Sizing an enabled 64-bit BAR can cause spurious mappings to
- * addresses in the upper part of the 64-bit address space. These
- * are never accessed by the CPU and beyond the address width of
- * some IOMMU hardware. TODO: VFIO should tell us the IOMMU width.
- */
- section->offset_within_address_space & (1ULL << 63);
-}
-
-static void vfio_iommu_map_notify(Notifier *n, void *data)
-{
- VFIOGuestIOMMU *giommu = container_of(n, VFIOGuestIOMMU, n);
- VFIOContainer *container = giommu->container;
- IOMMUTLBEntry *iotlb = data;
- MemoryRegion *mr;
- hwaddr xlat;
- hwaddr len = iotlb->addr_mask + 1;
- void *vaddr;
- int ret;
-
- trace_vfio_iommu_map_notify(iotlb->iova,
- iotlb->iova + iotlb->addr_mask);
-
- /*
- * The IOMMU TLB entry we have just covers translation through
- * this IOMMU to its immediate target. We need to translate
- * it the rest of the way through to memory.
- */
- mr = address_space_translate(&address_space_memory,
- iotlb->translated_addr,
- &xlat, &len, iotlb->perm & IOMMU_WO);
- if (!memory_region_is_ram(mr)) {
- error_report("iommu map to non memory area %"HWADDR_PRIx"\n",
- xlat);
- return;
- }
- /*
- * Translation truncates length to the IOMMU page size,
- * check that it did not truncate too much.
- */
- if (len & iotlb->addr_mask) {
- error_report("iommu has granularity incompatible with target AS\n");
- return;
- }
-
- if ((iotlb->perm & IOMMU_RW) != IOMMU_NONE) {
- vaddr = memory_region_get_ram_ptr(mr) + xlat;
-
- ret = vfio_dma_map(container, iotlb->iova,
- iotlb->addr_mask + 1, vaddr,
- !(iotlb->perm & IOMMU_WO) || mr->readonly);
- if (ret) {
- error_report("vfio_dma_map(%p, 0x%"HWADDR_PRIx", "
- "0x%"HWADDR_PRIx", %p) = %d (%m)",
- container, iotlb->iova,
- iotlb->addr_mask + 1, vaddr, ret);
- }
- } else {
- ret = vfio_dma_unmap(container, iotlb->iova, iotlb->addr_mask + 1);
- if (ret) {
- error_report("vfio_dma_unmap(%p, 0x%"HWADDR_PRIx", "
- "0x%"HWADDR_PRIx") = %d (%m)",
- container, iotlb->iova,
- iotlb->addr_mask + 1, ret);
- }
- }
-}
-
-static void vfio_listener_region_add(MemoryListener *listener,
- MemoryRegionSection *section)
-{
- VFIOContainer *container = container_of(listener, VFIOContainer,
- iommu_data.type1.listener);
- hwaddr iova, end;
- Int128 llend;
- void *vaddr;
- int ret;
-
- if (vfio_listener_skipped_section(section)) {
- trace_vfio_listener_region_add_skip(
- section->offset_within_address_space,
- section->offset_within_address_space +
- int128_get64(int128_sub(section->size, int128_one())));
- return;
- }
-
- if (unlikely((section->offset_within_address_space & ~TARGET_PAGE_MASK) !=
- (section->offset_within_region & ~TARGET_PAGE_MASK))) {
- error_report("%s received unaligned region", __func__);
- return;
- }
-
- iova = TARGET_PAGE_ALIGN(section->offset_within_address_space);
- llend = int128_make64(section->offset_within_address_space);
- llend = int128_add(llend, section->size);
- llend = int128_and(llend, int128_exts64(TARGET_PAGE_MASK));
-
- if (int128_ge(int128_make64(iova), llend)) {
- return;
- }
-
- memory_region_ref(section->mr);
-
- if (memory_region_is_iommu(section->mr)) {
- VFIOGuestIOMMU *giommu;
-
- trace_vfio_listener_region_add_iommu(iova,
- int128_get64(int128_sub(llend, int128_one())));
- /*
- * FIXME: We should do some checking to see if the
- * capabilities of the host VFIO IOMMU are adequate to model
- * the guest IOMMU
- *
- * FIXME: For VFIO iommu types which have KVM acceleration to
- * avoid bouncing all map/unmaps through qemu this way, this
- * would be the right place to wire that up (tell the KVM
- * device emulation the VFIO iommu handles to use).
- */
- /*
- * This assumes that the guest IOMMU is empty of
- * mappings at this point.
- *
- * One way of doing this is:
- * 1. Avoid sharing IOMMUs between emulated devices or different
- * IOMMU groups.
- * 2. Implement VFIO_IOMMU_ENABLE in the host kernel to fail if
- * there are some mappings in IOMMU.
- *
- * VFIO on SPAPR does that. Other IOMMU models may do that different,
- * they must make sure there are no existing mappings or
- * loop through existing mappings to map them into VFIO.
- */
- giommu = g_malloc0(sizeof(*giommu));
- giommu->iommu = section->mr;
- giommu->container = container;
- giommu->n.notify = vfio_iommu_map_notify;
- QLIST_INSERT_HEAD(&container->giommu_list, giommu, giommu_next);
- memory_region_register_iommu_notifier(giommu->iommu, &giommu->n);
-
- return;
- }
-
- /* Here we assume that memory_region_is_ram(section->mr)==true */
-
- end = int128_get64(llend);
- vaddr = memory_region_get_ram_ptr(section->mr) +
- section->offset_within_region +
- (iova - section->offset_within_address_space);
-
- trace_vfio_listener_region_add_ram(iova, end - 1, vaddr);
-
- ret = vfio_dma_map(container, iova, end - iova, vaddr, section->readonly);
- if (ret) {
- error_report("vfio_dma_map(%p, 0x%"HWADDR_PRIx", "
- "0x%"HWADDR_PRIx", %p) = %d (%m)",
- container, iova, end - iova, vaddr, ret);
-
- /*
- * On the initfn path, store the first error in the container so we
- * can gracefully fail. Runtime, there's not much we can do other
- * than throw a hardware error.
- */
- if (!container->iommu_data.type1.initialized) {
- if (!container->iommu_data.type1.error) {
- container->iommu_data.type1.error = ret;
- }
- } else {
- hw_error("vfio: DMA mapping failed, unable to continue");
- }
- }
-}
-
-static void vfio_listener_region_del(MemoryListener *listener,
- MemoryRegionSection *section)
-{
- VFIOContainer *container = container_of(listener, VFIOContainer,
- iommu_data.type1.listener);
- hwaddr iova, end;
- int ret;
-
- if (vfio_listener_skipped_section(section)) {
- trace_vfio_listener_region_del_skip(
- section->offset_within_address_space,
- section->offset_within_address_space +
- int128_get64(int128_sub(section->size, int128_one())));
- return;
- }
-
- if (unlikely((section->offset_within_address_space & ~TARGET_PAGE_MASK) !=
- (section->offset_within_region & ~TARGET_PAGE_MASK))) {
- error_report("%s received unaligned region", __func__);
- return;
- }
-
- if (memory_region_is_iommu(section->mr)) {
- VFIOGuestIOMMU *giommu;
-
- QLIST_FOREACH(giommu, &container->giommu_list, giommu_next) {
- if (giommu->iommu == section->mr) {
- memory_region_unregister_iommu_notifier(&giommu->n);
- QLIST_REMOVE(giommu, giommu_next);
- g_free(giommu);
- break;
- }
- }
-
- /*
- * FIXME: We assume the one big unmap below is adequate to
- * remove any individual page mappings in the IOMMU which
- * might have been copied into VFIO. This works for a page table
- * based IOMMU where a big unmap flattens a large range of IO-PTEs.
- * That may not be true for all IOMMU types.
- */
- }
-
- iova = TARGET_PAGE_ALIGN(section->offset_within_address_space);
- end = (section->offset_within_address_space + int128_get64(section->size)) &
- TARGET_PAGE_MASK;
-
- if (iova >= end) {
- return;
- }
-
- trace_vfio_listener_region_del(iova, end - 1);
-
- ret = vfio_dma_unmap(container, iova, end - iova);
- memory_region_unref(section->mr);
- if (ret) {
- error_report("vfio_dma_unmap(%p, 0x%"HWADDR_PRIx", "
- "0x%"HWADDR_PRIx") = %d (%m)",
- container, iova, end - iova, ret);
- }
-}
-
-static MemoryListener vfio_memory_listener = {
- .region_add = vfio_listener_region_add,
- .region_del = vfio_listener_region_del,
-};
-
-static void vfio_listener_release(VFIOContainer *container)
-{
- memory_listener_unregister(&container->iommu_data.type1.listener);
-}
-
-/*
- * Interrupt setup
- */
-static void vfio_disable_interrupts(VFIODevice *vdev)
-{
- switch (vdev->interrupt) {
- case VFIO_INT_INTx:
- vfio_disable_intx(vdev);
- break;
- case VFIO_INT_MSI:
- vfio_disable_msi(vdev);
- break;
- case VFIO_INT_MSIX:
- vfio_disable_msix(vdev);
- break;
- }
-}
-
-static int vfio_setup_msi(VFIODevice *vdev, int pos)
-{
- uint16_t ctrl;
- bool msi_64bit, msi_maskbit;
- int ret, entries;
-
- if (pread(vdev->fd, &ctrl, sizeof(ctrl),
- vdev->config_offset + pos + PCI_CAP_FLAGS) != sizeof(ctrl)) {
- return -errno;
- }
- ctrl = le16_to_cpu(ctrl);
-
- msi_64bit = !!(ctrl & PCI_MSI_FLAGS_64BIT);
- msi_maskbit = !!(ctrl & PCI_MSI_FLAGS_MASKBIT);
- entries = 1 << ((ctrl & PCI_MSI_FLAGS_QMASK) >> 1);
-
- trace_vfio_setup_msi(vdev->host.domain, vdev->host.bus,
- vdev->host.slot, vdev->host.function, pos);
-
- ret = msi_init(&vdev->pdev, pos, entries, msi_64bit, msi_maskbit);
- if (ret < 0) {
- if (ret == -ENOTSUP) {
- return 0;
- }
- error_report("vfio: msi_init failed");
- return ret;
- }
- vdev->msi_cap_size = 0xa + (msi_maskbit ? 0xa : 0) + (msi_64bit ? 0x4 : 0);
-
- return 0;
-}
-
-/*
- * We don't have any control over how pci_add_capability() inserts
- * capabilities into the chain. In order to setup MSI-X we need a
- * MemoryRegion for the BAR. In order to setup the BAR and not
- * attempt to mmap the MSI-X table area, which VFIO won't allow, we
- * need to first look for where the MSI-X table lives. So we
- * unfortunately split MSI-X setup across two functions.
- */
-static int vfio_early_setup_msix(VFIODevice *vdev)
-{
- uint8_t pos;
- uint16_t ctrl;
- uint32_t table, pba;
-
- pos = pci_find_capability(&vdev->pdev, PCI_CAP_ID_MSIX);
- if (!pos) {
- return 0;
- }
-
- if (pread(vdev->fd, &ctrl, sizeof(ctrl),
- vdev->config_offset + pos + PCI_CAP_FLAGS) != sizeof(ctrl)) {
- return -errno;
- }
-
- if (pread(vdev->fd, &table, sizeof(table),
- vdev->config_offset + pos + PCI_MSIX_TABLE) != sizeof(table)) {
- return -errno;
- }
-
- if (pread(vdev->fd, &pba, sizeof(pba),
- vdev->config_offset + pos + PCI_MSIX_PBA) != sizeof(pba)) {
- return -errno;
- }
-
- ctrl = le16_to_cpu(ctrl);
- table = le32_to_cpu(table);
- pba = le32_to_cpu(pba);
-
- vdev->msix = g_malloc0(sizeof(*(vdev->msix)));
- vdev->msix->table_bar = table & PCI_MSIX_FLAGS_BIRMASK;
- vdev->msix->table_offset = table & ~PCI_MSIX_FLAGS_BIRMASK;
- vdev->msix->pba_bar = pba & PCI_MSIX_FLAGS_BIRMASK;
- vdev->msix->pba_offset = pba & ~PCI_MSIX_FLAGS_BIRMASK;
- vdev->msix->entries = (ctrl & PCI_MSIX_FLAGS_QSIZE) + 1;
-
- trace_vfio_early_setup_msix(vdev->host.domain, vdev->host.bus,
- vdev->host.slot, vdev->host.function,
- pos, vdev->msix->table_bar,
- vdev->msix->table_offset,
- vdev->msix->entries);
-
- return 0;
-}
-
-static int vfio_setup_msix(VFIODevice *vdev, int pos)
-{
- int ret;
-
- ret = msix_init(&vdev->pdev, vdev->msix->entries,
- &vdev->bars[vdev->msix->table_bar].mem,
- vdev->msix->table_bar, vdev->msix->table_offset,
- &vdev->bars[vdev->msix->pba_bar].mem,
- vdev->msix->pba_bar, vdev->msix->pba_offset, pos);
- if (ret < 0) {
- if (ret == -ENOTSUP) {
- return 0;
- }
- error_report("vfio: msix_init failed");
- return ret;
- }
-
- return 0;
-}
-
-static void vfio_teardown_msi(VFIODevice *vdev)
-{
- msi_uninit(&vdev->pdev);
-
- if (vdev->msix) {
- msix_uninit(&vdev->pdev, &vdev->bars[vdev->msix->table_bar].mem,
- &vdev->bars[vdev->msix->pba_bar].mem);
- }
-}
-
-/*
- * Resource setup
- */
-static void vfio_mmap_set_enabled(VFIODevice *vdev, bool enabled)
-{
- int i;
-
- for (i = 0; i < PCI_ROM_SLOT; i++) {
- VFIOBAR *bar = &vdev->bars[i];
-
- if (!bar->size) {
- continue;
- }
-
- memory_region_set_enabled(&bar->mmap_mem, enabled);
- if (vdev->msix && vdev->msix->table_bar == i) {
- memory_region_set_enabled(&vdev->msix->mmap_mem, enabled);
- }
- }
-}
-
-static void vfio_unmap_bar(VFIODevice *vdev, int nr)
-{
- VFIOBAR *bar = &vdev->bars[nr];
-
- if (!bar->size) {
- return;
- }
-
- vfio_bar_quirk_teardown(vdev, nr);
-
- memory_region_del_subregion(&bar->mem, &bar->mmap_mem);
- munmap(bar->mmap, memory_region_size(&bar->mmap_mem));
-
- if (vdev->msix && vdev->msix->table_bar == nr) {
- memory_region_del_subregion(&bar->mem, &vdev->msix->mmap_mem);
- munmap(vdev->msix->mmap, memory_region_size(&vdev->msix->mmap_mem));
- }
-}
-
-static int vfio_mmap_bar(VFIODevice *vdev, VFIOBAR *bar,
- MemoryRegion *mem, MemoryRegion *submem,
- void **map, size_t size, off_t offset,
- const char *name)
-{
- int ret = 0;
-
- if (VFIO_ALLOW_MMAP && size && bar->flags & VFIO_REGION_INFO_FLAG_MMAP) {
- int prot = 0;
-
- if (bar->flags & VFIO_REGION_INFO_FLAG_READ) {
- prot |= PROT_READ;
- }
-
- if (bar->flags & VFIO_REGION_INFO_FLAG_WRITE) {
- prot |= PROT_WRITE;
- }
-
- *map = mmap(NULL, size, prot, MAP_SHARED,
- bar->fd, bar->fd_offset + offset);
- if (*map == MAP_FAILED) {
- *map = NULL;
- ret = -errno;
- goto empty_region;
- }
-
- memory_region_init_ram_ptr(submem, OBJECT(vdev), name, size, *map);
- memory_region_set_skip_dump(submem);
- } else {
-empty_region:
- /* Create a zero sized sub-region to make cleanup easy. */
- memory_region_init(submem, OBJECT(vdev), name, 0);
- }
-
- memory_region_add_subregion(mem, offset, submem);
-
- return ret;
-}
-
-static void vfio_map_bar(VFIODevice *vdev, int nr)
-{
- VFIOBAR *bar = &vdev->bars[nr];
- unsigned size = bar->size;
- char name[64];
- uint32_t pci_bar;
- uint8_t type;
- int ret;
-
- /* Skip both unimplemented BARs and the upper half of 64bit BARS. */
- if (!size) {
- return;
- }
-
- snprintf(name, sizeof(name), "VFIO %04x:%02x:%02x.%x BAR %d",
- vdev->host.domain, vdev->host.bus, vdev->host.slot,
- vdev->host.function, nr);
-
- /* Determine what type of BAR this is for registration */
- ret = pread(vdev->fd, &pci_bar, sizeof(pci_bar),
- vdev->config_offset + PCI_BASE_ADDRESS_0 + (4 * nr));
- if (ret != sizeof(pci_bar)) {
- error_report("vfio: Failed to read BAR %d (%m)", nr);
- return;
- }
-
- pci_bar = le32_to_cpu(pci_bar);
- bar->ioport = (pci_bar & PCI_BASE_ADDRESS_SPACE_IO);
- bar->mem64 = bar->ioport ? 0 : (pci_bar & PCI_BASE_ADDRESS_MEM_TYPE_64);
- type = pci_bar & (bar->ioport ? ~PCI_BASE_ADDRESS_IO_MASK :
- ~PCI_BASE_ADDRESS_MEM_MASK);
-
- /* A "slow" read/write mapping underlies all BARs */
- memory_region_init_io(&bar->mem, OBJECT(vdev), &vfio_bar_ops,
- bar, name, size);
- pci_register_bar(&vdev->pdev, nr, type, &bar->mem);
-
- /*
- * We can't mmap areas overlapping the MSIX vector table, so we
- * potentially insert a direct-mapped subregion before and after it.
- */
- if (vdev->msix && vdev->msix->table_bar == nr) {
- size = vdev->msix->table_offset & qemu_host_page_mask;
- }
-
- strncat(name, " mmap", sizeof(name) - strlen(name) - 1);
- if (vfio_mmap_bar(vdev, bar, &bar->mem,
- &bar->mmap_mem, &bar->mmap, size, 0, name)) {
- error_report("%s unsupported. Performance may be slow", name);
- }
-
- if (vdev->msix && vdev->msix->table_bar == nr) {
- unsigned start;
-
- start = HOST_PAGE_ALIGN(vdev->msix->table_offset +
- (vdev->msix->entries * PCI_MSIX_ENTRY_SIZE));
-
- size = start < bar->size ? bar->size - start : 0;
- strncat(name, " msix-hi", sizeof(name) - strlen(name) - 1);
- /* VFIOMSIXInfo contains another MemoryRegion for this mapping */
- if (vfio_mmap_bar(vdev, bar, &bar->mem, &vdev->msix->mmap_mem,
- &vdev->msix->mmap, size, start, name)) {
- error_report("%s unsupported. Performance may be slow", name);
- }
- }
-
- vfio_bar_quirk_setup(vdev, nr);
-}
-
-static void vfio_map_bars(VFIODevice *vdev)
-{
- int i;
-
- for (i = 0; i < PCI_ROM_SLOT; i++) {
- vfio_map_bar(vdev, i);
- }
-
- if (vdev->has_vga) {
- memory_region_init_io(&vdev->vga.region[QEMU_PCI_VGA_MEM].mem,
- OBJECT(vdev), &vfio_vga_ops,
- &vdev->vga.region[QEMU_PCI_VGA_MEM],
- "vfio-vga-mmio@0xa0000",
- QEMU_PCI_VGA_MEM_SIZE);
- memory_region_init_io(&vdev->vga.region[QEMU_PCI_VGA_IO_LO].mem,
- OBJECT(vdev), &vfio_vga_ops,
- &vdev->vga.region[QEMU_PCI_VGA_IO_LO],
- "vfio-vga-io@0x3b0",
- QEMU_PCI_VGA_IO_LO_SIZE);
- memory_region_init_io(&vdev->vga.region[QEMU_PCI_VGA_IO_HI].mem,
- OBJECT(vdev), &vfio_vga_ops,
- &vdev->vga.region[QEMU_PCI_VGA_IO_HI],
- "vfio-vga-io@0x3c0",
- QEMU_PCI_VGA_IO_HI_SIZE);
-
- pci_register_vga(&vdev->pdev, &vdev->vga.region[QEMU_PCI_VGA_MEM].mem,
- &vdev->vga.region[QEMU_PCI_VGA_IO_LO].mem,
- &vdev->vga.region[QEMU_PCI_VGA_IO_HI].mem);
- vfio_vga_quirk_setup(vdev);
- }
-}
-
-static void vfio_unmap_bars(VFIODevice *vdev)
-{
- int i;
-
- for (i = 0; i < PCI_ROM_SLOT; i++) {
- vfio_unmap_bar(vdev, i);
- }
-
- if (vdev->has_vga) {
- vfio_vga_quirk_teardown(vdev);
- pci_unregister_vga(&vdev->pdev);
- }
-}
-
-/*
- * General setup
- */
-static uint8_t vfio_std_cap_max_size(PCIDevice *pdev, uint8_t pos)
-{
- uint8_t tmp, next = 0xff;
-
- for (tmp = pdev->config[PCI_CAPABILITY_LIST]; tmp;
- tmp = pdev->config[tmp + 1]) {
- if (tmp > pos && tmp < next) {
- next = tmp;
- }
- }
-
- return next - pos;
-}
-
-static void vfio_set_word_bits(uint8_t *buf, uint16_t val, uint16_t mask)
-{
- pci_set_word(buf, (pci_get_word(buf) & ~mask) | val);
-}
-
-static void vfio_add_emulated_word(VFIODevice *vdev, int pos,
- uint16_t val, uint16_t mask)
-{
- vfio_set_word_bits(vdev->pdev.config + pos, val, mask);
- vfio_set_word_bits(vdev->pdev.wmask + pos, ~mask, mask);
- vfio_set_word_bits(vdev->emulated_config_bits + pos, mask, mask);
-}
-
-static void vfio_set_long_bits(uint8_t *buf, uint32_t val, uint32_t mask)
-{
- pci_set_long(buf, (pci_get_long(buf) & ~mask) | val);
-}
-
-static void vfio_add_emulated_long(VFIODevice *vdev, int pos,
- uint32_t val, uint32_t mask)
-{
- vfio_set_long_bits(vdev->pdev.config + pos, val, mask);
- vfio_set_long_bits(vdev->pdev.wmask + pos, ~mask, mask);
- vfio_set_long_bits(vdev->emulated_config_bits + pos, mask, mask);
-}
-
-static int vfio_setup_pcie_cap(VFIODevice *vdev, int pos, uint8_t size)
-{
- uint16_t flags;
- uint8_t type;
-
- flags = pci_get_word(vdev->pdev.config + pos + PCI_CAP_FLAGS);
- type = (flags & PCI_EXP_FLAGS_TYPE) >> 4;
-
- if (type != PCI_EXP_TYPE_ENDPOINT &&
- type != PCI_EXP_TYPE_LEG_END &&
- type != PCI_EXP_TYPE_RC_END) {
-
- error_report("vfio: Assignment of PCIe type 0x%x "
- "devices is not currently supported", type);
- return -EINVAL;
- }
-
- if (!pci_bus_is_express(vdev->pdev.bus)) {
- /*
- * Use express capability as-is on PCI bus. It doesn't make much
- * sense to even expose, but some drivers (ex. tg3) depend on it
- * and guests don't seem to be particular about it. We'll need
- * to revist this or force express devices to express buses if we
- * ever expose an IOMMU to the guest.
- */
- } else if (pci_bus_is_root(vdev->pdev.bus)) {
- /*
- * On a Root Complex bus Endpoints become Root Complex Integrated
- * Endpoints, which changes the type and clears the LNK & LNK2 fields.
- */
- if (type == PCI_EXP_TYPE_ENDPOINT) {
- vfio_add_emulated_word(vdev, pos + PCI_CAP_FLAGS,
- PCI_EXP_TYPE_RC_END << 4,
- PCI_EXP_FLAGS_TYPE);
-
- /* Link Capabilities, Status, and Control goes away */
- if (size > PCI_EXP_LNKCTL) {
- vfio_add_emulated_long(vdev, pos + PCI_EXP_LNKCAP, 0, ~0);
- vfio_add_emulated_word(vdev, pos + PCI_EXP_LNKCTL, 0, ~0);
- vfio_add_emulated_word(vdev, pos + PCI_EXP_LNKSTA, 0, ~0);
-
-#ifndef PCI_EXP_LNKCAP2
-#define PCI_EXP_LNKCAP2 44
-#endif
-#ifndef PCI_EXP_LNKSTA2
-#define PCI_EXP_LNKSTA2 50
-#endif
- /* Link 2 Capabilities, Status, and Control goes away */
- if (size > PCI_EXP_LNKCAP2) {
- vfio_add_emulated_long(vdev, pos + PCI_EXP_LNKCAP2, 0, ~0);
- vfio_add_emulated_word(vdev, pos + PCI_EXP_LNKCTL2, 0, ~0);
- vfio_add_emulated_word(vdev, pos + PCI_EXP_LNKSTA2, 0, ~0);
- }
- }
-
- } else if (type == PCI_EXP_TYPE_LEG_END) {
- /*
- * Legacy endpoints don't belong on the root complex. Windows
- * seems to be happier with devices if we skip the capability.
- */
- return 0;
- }
-
- } else {
- /*
- * Convert Root Complex Integrated Endpoints to regular endpoints.
- * These devices don't support LNK/LNK2 capabilities, so make them up.
- */
- if (type == PCI_EXP_TYPE_RC_END) {
- vfio_add_emulated_word(vdev, pos + PCI_CAP_FLAGS,
- PCI_EXP_TYPE_ENDPOINT << 4,
- PCI_EXP_FLAGS_TYPE);
- vfio_add_emulated_long(vdev, pos + PCI_EXP_LNKCAP,
- PCI_EXP_LNK_MLW_1 | PCI_EXP_LNK_LS_25, ~0);
- vfio_add_emulated_word(vdev, pos + PCI_EXP_LNKCTL, 0, ~0);
- }
-
- /* Mark the Link Status bits as emulated to allow virtual negotiation */
- vfio_add_emulated_word(vdev, pos + PCI_EXP_LNKSTA,
- pci_get_word(vdev->pdev.config + pos +
- PCI_EXP_LNKSTA),
- PCI_EXP_LNKCAP_MLW | PCI_EXP_LNKCAP_SLS);
- }
-
- pos = pci_add_capability(&vdev->pdev, PCI_CAP_ID_EXP, pos, size);
- if (pos >= 0) {
- vdev->pdev.exp.exp_cap = pos;
- }
-
- return pos;
-}
-
-static void vfio_check_pcie_flr(VFIODevice *vdev, uint8_t pos)
-{
- uint32_t cap = pci_get_long(vdev->pdev.config + pos + PCI_EXP_DEVCAP);
-
- if (cap & PCI_EXP_DEVCAP_FLR) {
- trace_vfio_check_pcie_flr(vdev->host.domain, vdev->host.bus,
- vdev->host.slot, vdev->host.function);
- vdev->has_flr = true;
- }
-}
-
-static void vfio_check_pm_reset(VFIODevice *vdev, uint8_t pos)
-{
- uint16_t csr = pci_get_word(vdev->pdev.config + pos + PCI_PM_CTRL);
-
- if (!(csr & PCI_PM_CTRL_NO_SOFT_RESET)) {
- trace_vfio_check_pm_reset(vdev->host.domain, vdev->host.bus,
- vdev->host.slot, vdev->host.function);
- vdev->has_pm_reset = true;
- }
-}
-
-static void vfio_check_af_flr(VFIODevice *vdev, uint8_t pos)
-{
- uint8_t cap = pci_get_byte(vdev->pdev.config + pos + PCI_AF_CAP);
-
- if ((cap & PCI_AF_CAP_TP) && (cap & PCI_AF_CAP_FLR)) {
- trace_vfio_check_af_flr(vdev->host.domain, vdev->host.bus,
- vdev->host.slot, vdev->host.function);
- vdev->has_flr = true;
- }
-}
-
-static int vfio_add_std_cap(VFIODevice *vdev, uint8_t pos)
-{
- PCIDevice *pdev = &vdev->pdev;
- uint8_t cap_id, next, size;
- int ret;
-
- cap_id = pdev->config[pos];
- next = pdev->config[pos + 1];
-
- /*
- * If it becomes important to configure capabilities to their actual
- * size, use this as the default when it's something we don't recognize.
- * Since QEMU doesn't actually handle many of the config accesses,
- * exact size doesn't seem worthwhile.
- */
- size = vfio_std_cap_max_size(pdev, pos);
-
- /*
- * pci_add_capability always inserts the new capability at the head
- * of the chain. Therefore to end up with a chain that matches the
- * physical device, we insert from the end by making this recursive.
- * This is also why we pre-caclulate size above as cached config space
- * will be changed as we unwind the stack.
- */
- if (next) {
- ret = vfio_add_std_cap(vdev, next);
- if (ret) {
- return ret;
- }
- } else {
- /* Begin the rebuild, use QEMU emulated list bits */
- pdev->config[PCI_CAPABILITY_LIST] = 0;
- vdev->emulated_config_bits[PCI_CAPABILITY_LIST] = 0xff;
- vdev->emulated_config_bits[PCI_STATUS] |= PCI_STATUS_CAP_LIST;
- }
-
- /* Use emulated next pointer to allow dropping caps */
- pci_set_byte(vdev->emulated_config_bits + pos + 1, 0xff);
-
- switch (cap_id) {
- case PCI_CAP_ID_MSI:
- ret = vfio_setup_msi(vdev, pos);
- break;
- case PCI_CAP_ID_EXP:
- vfio_check_pcie_flr(vdev, pos);
- ret = vfio_setup_pcie_cap(vdev, pos, size);
- break;
- case PCI_CAP_ID_MSIX:
- ret = vfio_setup_msix(vdev, pos);
- break;
- case PCI_CAP_ID_PM:
- vfio_check_pm_reset(vdev, pos);
- vdev->pm_cap = pos;
- ret = pci_add_capability(pdev, cap_id, pos, size);
- break;
- case PCI_CAP_ID_AF:
- vfio_check_af_flr(vdev, pos);
- ret = pci_add_capability(pdev, cap_id, pos, size);
- break;
- default:
- ret = pci_add_capability(pdev, cap_id, pos, size);
- break;
- }
-
- if (ret < 0) {
- error_report("vfio: %04x:%02x:%02x.%x Error adding PCI capability "
- "0x%x[0x%x]@0x%x: %d", vdev->host.domain,
- vdev->host.bus, vdev->host.slot, vdev->host.function,
- cap_id, size, pos, ret);
- return ret;
- }
-
- return 0;
-}
-
-static int vfio_add_capabilities(VFIODevice *vdev)
-{
- PCIDevice *pdev = &vdev->pdev;
-
- if (!(pdev->config[PCI_STATUS] & PCI_STATUS_CAP_LIST) ||
- !pdev->config[PCI_CAPABILITY_LIST]) {
- return 0; /* Nothing to add */
- }
-
- return vfio_add_std_cap(vdev, pdev->config[PCI_CAPABILITY_LIST]);
-}
-
-static void vfio_pci_pre_reset(VFIODevice *vdev)
-{
- PCIDevice *pdev = &vdev->pdev;
- uint16_t cmd;
-
- vfio_disable_interrupts(vdev);
-
- /* Make sure the device is in D0 */
- if (vdev->pm_cap) {
- uint16_t pmcsr;
- uint8_t state;
-
- pmcsr = vfio_pci_read_config(pdev, vdev->pm_cap + PCI_PM_CTRL, 2);
- state = pmcsr & PCI_PM_CTRL_STATE_MASK;
- if (state) {
- pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
- vfio_pci_write_config(pdev, vdev->pm_cap + PCI_PM_CTRL, pmcsr, 2);
- /* vfio handles the necessary delay here */
- pmcsr = vfio_pci_read_config(pdev, vdev->pm_cap + PCI_PM_CTRL, 2);
- state = pmcsr & PCI_PM_CTRL_STATE_MASK;
- if (state) {
- error_report("vfio: Unable to power on device, stuck in D%d",
- state);
- }
- }
- }
-
- /*
- * Stop any ongoing DMA by disconecting I/O, MMIO, and bus master.
- * Also put INTx Disable in known state.
- */
- cmd = vfio_pci_read_config(pdev, PCI_COMMAND, 2);
- cmd &= ~(PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
- PCI_COMMAND_INTX_DISABLE);
- vfio_pci_write_config(pdev, PCI_COMMAND, cmd, 2);
-}
-
-static void vfio_pci_post_reset(VFIODevice *vdev)
-{
- vfio_enable_intx(vdev);
-}
-
-static bool vfio_pci_host_match(PCIHostDeviceAddress *host1,
- PCIHostDeviceAddress *host2)
-{
- return (host1->domain == host2->domain && host1->bus == host2->bus &&
- host1->slot == host2->slot && host1->function == host2->function);
-}
-
-static int vfio_pci_hot_reset(VFIODevice *vdev, bool single)
-{
- VFIOGroup *group;
- struct vfio_pci_hot_reset_info *info;
- struct vfio_pci_dependent_device *devices;
- struct vfio_pci_hot_reset *reset;
- int32_t *fds;
- int ret, i, count;
- bool multi = false;
-
- trace_vfio_pci_hot_reset(vdev->host.domain, vdev->host.bus,
- vdev->host.slot, vdev->host.function,
- single ? "one" : "multi");
-
- vfio_pci_pre_reset(vdev);
- vdev->needs_reset = false;
-
- info = g_malloc0(sizeof(*info));
- info->argsz = sizeof(*info);
-
- ret = ioctl(vdev->fd, VFIO_DEVICE_GET_PCI_HOT_RESET_INFO, info);
- if (ret && errno != ENOSPC) {
- ret = -errno;
- if (!vdev->has_pm_reset) {
- error_report("vfio: Cannot reset device %04x:%02x:%02x.%x, "
- "no available reset mechanism.", vdev->host.domain,
- vdev->host.bus, vdev->host.slot, vdev->host.function);
- }
- goto out_single;
- }
-
- count = info->count;
- info = g_realloc(info, sizeof(*info) + (count * sizeof(*devices)));
- info->argsz = sizeof(*info) + (count * sizeof(*devices));
- devices = &info->devices[0];
-
- ret = ioctl(vdev->fd, VFIO_DEVICE_GET_PCI_HOT_RESET_INFO, info);
- if (ret) {
- ret = -errno;
- error_report("vfio: hot reset info failed: %m");
- goto out_single;
- }
-
- trace_vfio_pci_hot_reset_has_dep_devices(vdev->host.domain,
- vdev->host.bus,
- vdev->host.slot,
- vdev->host.function);
-
- /* Verify that we have all the groups required */
- for (i = 0; i < info->count; i++) {
- PCIHostDeviceAddress host;
- VFIODevice *tmp;
-
- host.domain = devices[i].segment;
- host.bus = devices[i].bus;
- host.slot = PCI_SLOT(devices[i].devfn);
- host.function = PCI_FUNC(devices[i].devfn);
-
- trace_vfio_pci_hot_reset_dep_devices(host.domain,
- host.bus, host.slot, host.function, devices[i].group_id);
-
- if (vfio_pci_host_match(&host, &vdev->host)) {
- continue;
- }
-
- QLIST_FOREACH(group, &group_list, next) {
- if (group->groupid == devices[i].group_id) {
- break;
- }
- }
-
- if (!group) {
- if (!vdev->has_pm_reset) {
- error_report("vfio: Cannot reset device %04x:%02x:%02x.%x, "
- "depends on group %d which is not owned.",
- vdev->host.domain, vdev->host.bus, vdev->host.slot,
- vdev->host.function, devices[i].group_id);
- }
- ret = -EPERM;
- goto out;
- }
-
- /* Prep dependent devices for reset and clear our marker. */
- QLIST_FOREACH(tmp, &group->device_list, next) {
- if (vfio_pci_host_match(&host, &tmp->host)) {
- if (single) {
- error_report("vfio: found another in-use device "
- "%04x:%02x:%02x.%x\n", host.domain, host.bus,
- host.slot, host.function);
- ret = -EINVAL;
- goto out_single;
- }
- vfio_pci_pre_reset(tmp);
- tmp->needs_reset = false;
- multi = true;
- break;
- }
- }
- }
-
- if (!single && !multi) {
- error_report("vfio: No other in-use devices for multi hot reset\n");
- ret = -EINVAL;
- goto out_single;
- }
-
- /* Determine how many group fds need to be passed */
- count = 0;
- QLIST_FOREACH(group, &group_list, next) {
- for (i = 0; i < info->count; i++) {
- if (group->groupid == devices[i].group_id) {
- count++;
- break;
- }
- }
- }
-
- reset = g_malloc0(sizeof(*reset) + (count * sizeof(*fds)));
- reset->argsz = sizeof(*reset) + (count * sizeof(*fds));
- fds = &reset->group_fds[0];
-
- /* Fill in group fds */
- QLIST_FOREACH(group, &group_list, next) {
- for (i = 0; i < info->count; i++) {
- if (group->groupid == devices[i].group_id) {
- fds[reset->count++] = group->fd;
- break;
- }
- }
- }
-
- /* Bus reset! */
- ret = ioctl(vdev->fd, VFIO_DEVICE_PCI_HOT_RESET, reset);
- g_free(reset);
-
- trace_vfio_pci_hot_reset_result(vdev->host.domain,
- vdev->host.bus,
- vdev->host.slot,
- vdev->host.function,
- ret ? "%m" : "Success");
-
-out:
- /* Re-enable INTx on affected devices */
- for (i = 0; i < info->count; i++) {
- PCIHostDeviceAddress host;
- VFIODevice *tmp;
-
- host.domain = devices[i].segment;
- host.bus = devices[i].bus;
- host.slot = PCI_SLOT(devices[i].devfn);
- host.function = PCI_FUNC(devices[i].devfn);
-
- if (vfio_pci_host_match(&host, &vdev->host)) {
- continue;
- }
-
- QLIST_FOREACH(group, &group_list, next) {
- if (group->groupid == devices[i].group_id) {
- break;
- }
- }
-
- if (!group) {
- break;
- }
-
- QLIST_FOREACH(tmp, &group->device_list, next) {
- if (vfio_pci_host_match(&host, &tmp->host)) {
- vfio_pci_post_reset(tmp);
- break;
- }
- }
- }
-out_single:
- vfio_pci_post_reset(vdev);
- g_free(info);
-
- return ret;
-}
-
-/*
- * We want to differentiate hot reset of mulitple in-use devices vs hot reset
- * of a single in-use device. VFIO_DEVICE_RESET will already handle the case
- * of doing hot resets when there is only a single device per bus. The in-use
- * here refers to how many VFIODevices are affected. A hot reset that affects
- * multiple devices, but only a single in-use device, means that we can call
- * it from our bus ->reset() callback since the extent is effectively a single
- * device. This allows us to make use of it in the hotplug path. When there
- * are multiple in-use devices, we can only trigger the hot reset during a
- * system reset and thus from our reset handler. We separate _one vs _multi
- * here so that we don't overlap and do a double reset on the system reset
- * path where both our reset handler and ->reset() callback are used. Calling
- * _one() will only do a hot reset for the one in-use devices case, calling
- * _multi() will do nothing if a _one() would have been sufficient.
- */
-static int vfio_pci_hot_reset_one(VFIODevice *vdev)
-{
- return vfio_pci_hot_reset(vdev, true);
-}
-
-static int vfio_pci_hot_reset_multi(VFIODevice *vdev)
-{
- return vfio_pci_hot_reset(vdev, false);
-}
-
-static void vfio_pci_reset_handler(void *opaque)
-{
- VFIOGroup *group;
- VFIODevice *vdev;
-
- QLIST_FOREACH(group, &group_list, next) {
- QLIST_FOREACH(vdev, &group->device_list, next) {
- if (!vdev->reset_works || (!vdev->has_flr && vdev->has_pm_reset)) {
- vdev->needs_reset = true;
- }
- }
- }
-
- QLIST_FOREACH(group, &group_list, next) {
- QLIST_FOREACH(vdev, &group->device_list, next) {
- if (vdev->needs_reset) {
- vfio_pci_hot_reset_multi(vdev);
- }
- }
- }
-}
-
-static void vfio_kvm_device_add_group(VFIOGroup *group)
-{
-#ifdef CONFIG_KVM
- struct kvm_device_attr attr = {
- .group = KVM_DEV_VFIO_GROUP,
- .attr = KVM_DEV_VFIO_GROUP_ADD,
- .addr = (uint64_t)(unsigned long)&group->fd,
- };
-
- if (!kvm_enabled()) {
- return;
- }
-
- if (vfio_kvm_device_fd < 0) {
- struct kvm_create_device cd = {
- .type = KVM_DEV_TYPE_VFIO,
- };
-
- if (kvm_vm_ioctl(kvm_state, KVM_CREATE_DEVICE, &cd)) {
- error_report("KVM_CREATE_DEVICE: %m\n");
- return;
- }
-
- vfio_kvm_device_fd = cd.fd;
- }
-
- if (ioctl(vfio_kvm_device_fd, KVM_SET_DEVICE_ATTR, &attr)) {
- error_report("Failed to add group %d to KVM VFIO device: %m",
- group->groupid);
- }
-#endif
-}
-
-static void vfio_kvm_device_del_group(VFIOGroup *group)
-{
-#ifdef CONFIG_KVM
- struct kvm_device_attr attr = {
- .group = KVM_DEV_VFIO_GROUP,
- .attr = KVM_DEV_VFIO_GROUP_DEL,
- .addr = (uint64_t)(unsigned long)&group->fd,
- };
-
- if (vfio_kvm_device_fd < 0) {
- return;
- }
-
- if (ioctl(vfio_kvm_device_fd, KVM_SET_DEVICE_ATTR, &attr)) {
- error_report("Failed to remove group %d from KVM VFIO device: %m",
- group->groupid);
- }
-#endif
-}
-
-static VFIOAddressSpace *vfio_get_address_space(AddressSpace *as)
-{
- VFIOAddressSpace *space;
-
- QLIST_FOREACH(space, &vfio_address_spaces, list) {
- if (space->as == as) {
- return space;
- }
- }
-
- /* No suitable VFIOAddressSpace, create a new one */
- space = g_malloc0(sizeof(*space));
- space->as = as;
- QLIST_INIT(&space->containers);
-
- QLIST_INSERT_HEAD(&vfio_address_spaces, space, list);
-
- return space;
-}
-
-static void vfio_put_address_space(VFIOAddressSpace *space)
-{
- if (QLIST_EMPTY(&space->containers)) {
- QLIST_REMOVE(space, list);
- g_free(space);
- }
-}
-
-static int vfio_connect_container(VFIOGroup *group, AddressSpace *as)
-{
- VFIOContainer *container;
- int ret, fd;
- VFIOAddressSpace *space;
-
- space = vfio_get_address_space(as);
-
- QLIST_FOREACH(container, &space->containers, next) {
- if (!ioctl(group->fd, VFIO_GROUP_SET_CONTAINER, &container->fd)) {
- group->container = container;
- QLIST_INSERT_HEAD(&container->group_list, group, container_next);
- return 0;
- }
- }
-
- fd = qemu_open("/dev/vfio/vfio", O_RDWR);
- if (fd < 0) {
- error_report("vfio: failed to open /dev/vfio/vfio: %m");
- ret = -errno;
- goto put_space_exit;
- }
-
- ret = ioctl(fd, VFIO_GET_API_VERSION);
- if (ret != VFIO_API_VERSION) {
- error_report("vfio: supported vfio version: %d, "
- "reported version: %d", VFIO_API_VERSION, ret);
- ret = -EINVAL;
- goto close_fd_exit;
- }
-
- container = g_malloc0(sizeof(*container));
- container->space = space;
- container->fd = fd;
-
- if (ioctl(fd, VFIO_CHECK_EXTENSION, VFIO_TYPE1_IOMMU)) {
- ret = ioctl(group->fd, VFIO_GROUP_SET_CONTAINER, &fd);
- if (ret) {
- error_report("vfio: failed to set group container: %m");
- ret = -errno;
- goto free_container_exit;
- }
-
- ret = ioctl(fd, VFIO_SET_IOMMU, VFIO_TYPE1_IOMMU);
- if (ret) {
- error_report("vfio: failed to set iommu for container: %m");
- ret = -errno;
- goto free_container_exit;
- }
-
- container->iommu_data.type1.listener = vfio_memory_listener;
- container->iommu_data.release = vfio_listener_release;
-
- memory_listener_register(&container->iommu_data.type1.listener,
- container->space->as);
-
- if (container->iommu_data.type1.error) {
- ret = container->iommu_data.type1.error;
- error_report("vfio: memory listener initialization failed for container");
- goto listener_release_exit;
- }
-
- container->iommu_data.type1.initialized = true;
-
- } else if (ioctl(fd, VFIO_CHECK_EXTENSION, VFIO_SPAPR_TCE_IOMMU)) {
- ret = ioctl(group->fd, VFIO_GROUP_SET_CONTAINER, &fd);
- if (ret) {
- error_report("vfio: failed to set group container: %m");
- ret = -errno;
- goto free_container_exit;
- }
-
- ret = ioctl(fd, VFIO_SET_IOMMU, VFIO_SPAPR_TCE_IOMMU);
- if (ret) {
- error_report("vfio: failed to set iommu for container: %m");
- ret = -errno;
- goto free_container_exit;
- }
-
- /*
- * The host kernel code implementing VFIO_IOMMU_DISABLE is called
- * when container fd is closed so we do not call it explicitly
- * in this file.
- */
- ret = ioctl(fd, VFIO_IOMMU_ENABLE);
- if (ret) {
- error_report("vfio: failed to enable container: %m");
- ret = -errno;
- goto free_container_exit;
- }
-
- container->iommu_data.type1.listener = vfio_memory_listener;
- container->iommu_data.release = vfio_listener_release;
-
- memory_listener_register(&container->iommu_data.type1.listener,
- container->space->as);
-
- } else {
- error_report("vfio: No available IOMMU models");
- ret = -EINVAL;
- goto free_container_exit;
- }
-
- QLIST_INIT(&container->group_list);
- QLIST_INSERT_HEAD(&space->containers, container, next);
-
- group->container = container;
- QLIST_INSERT_HEAD(&container->group_list, group, container_next);
-
- return 0;
-
-listener_release_exit:
- vfio_listener_release(container);
-
-free_container_exit:
- g_free(container);
-
-close_fd_exit:
- close(fd);
-
-put_space_exit:
- vfio_put_address_space(space);
-
- return ret;
-}
-
-static void vfio_disconnect_container(VFIOGroup *group)
-{
- VFIOContainer *container = group->container;
-
- if (ioctl(group->fd, VFIO_GROUP_UNSET_CONTAINER, &container->fd)) {
- error_report("vfio: error disconnecting group %d from container",
- group->groupid);
- }
-
- QLIST_REMOVE(group, container_next);
- group->container = NULL;
-
- if (QLIST_EMPTY(&container->group_list)) {
- VFIOAddressSpace *space = container->space;
-
- if (container->iommu_data.release) {
- container->iommu_data.release(container);
- }
- QLIST_REMOVE(container, next);
- trace_vfio_disconnect_container(container->fd);
- close(container->fd);
- g_free(container);
-
- vfio_put_address_space(space);
- }
-}
-
-static VFIOGroup *vfio_get_group(int groupid, AddressSpace *as)
-{
- VFIOGroup *group;
- char path[32];
- struct vfio_group_status status = { .argsz = sizeof(status) };
-
- QLIST_FOREACH(group, &group_list, next) {
- if (group->groupid == groupid) {
- /* Found it. Now is it already in the right context? */
- if (group->container->space->as == as) {
- return group;
- } else {
- error_report("vfio: group %d used in multiple address spaces",
- group->groupid);
- return NULL;
- }
- }
- }
-
- group = g_malloc0(sizeof(*group));
-
- snprintf(path, sizeof(path), "/dev/vfio/%d", groupid);
- group->fd = qemu_open(path, O_RDWR);
- if (group->fd < 0) {
- error_report("vfio: error opening %s: %m", path);
- goto free_group_exit;
- }
-
- if (ioctl(group->fd, VFIO_GROUP_GET_STATUS, &status)) {
- error_report("vfio: error getting group status: %m");
- goto close_fd_exit;
- }
-
- if (!(status.flags & VFIO_GROUP_FLAGS_VIABLE)) {
- error_report("vfio: error, group %d is not viable, please ensure "
- "all devices within the iommu_group are bound to their "
- "vfio bus driver.", groupid);
- goto close_fd_exit;
- }
-
- group->groupid = groupid;
- QLIST_INIT(&group->device_list);
-
- if (vfio_connect_container(group, as)) {
- error_report("vfio: failed to setup container for group %d", groupid);
- goto close_fd_exit;
- }
-
- if (QLIST_EMPTY(&group_list)) {
- qemu_register_reset(vfio_pci_reset_handler, NULL);
- }
-
- QLIST_INSERT_HEAD(&group_list, group, next);
-
- vfio_kvm_device_add_group(group);
-
- return group;
-
-close_fd_exit:
- close(group->fd);
-
-free_group_exit:
- g_free(group);
-
- return NULL;
-}
-
-static void vfio_put_group(VFIOGroup *group)
-{
- if (!QLIST_EMPTY(&group->device_list)) {
- return;
- }
-
- vfio_kvm_device_del_group(group);
- vfio_disconnect_container(group);
- QLIST_REMOVE(group, next);
- trace_vfio_put_group(group->fd);
- close(group->fd);
- g_free(group);
-
- if (QLIST_EMPTY(&group_list)) {
- qemu_unregister_reset(vfio_pci_reset_handler, NULL);
- }
-}
-
-static int vfio_get_device(VFIOGroup *group, const char *name, VFIODevice *vdev)
-{
- struct vfio_device_info dev_info = { .argsz = sizeof(dev_info) };
- struct vfio_region_info reg_info = { .argsz = sizeof(reg_info) };
- struct vfio_irq_info irq_info = { .argsz = sizeof(irq_info) };
- int ret, i;
-
- ret = ioctl(group->fd, VFIO_GROUP_GET_DEVICE_FD, name);
- if (ret < 0) {
- error_report("vfio: error getting device %s from group %d: %m",
- name, group->groupid);
- error_printf("Verify all devices in group %d are bound to vfio-pci "
- "or pci-stub and not already in use\n", group->groupid);
- return ret;
- }
-
- vdev->fd = ret;
- vdev->group = group;
- QLIST_INSERT_HEAD(&group->device_list, vdev, next);
-
- /* Sanity check device */
- ret = ioctl(vdev->fd, VFIO_DEVICE_GET_INFO, &dev_info);
- if (ret) {
- error_report("vfio: error getting device info: %m");
- goto error;
- }
-
- trace_vfio_get_device_irq(name, dev_info.flags,
- dev_info.num_regions, dev_info.num_irqs);
-
- if (!(dev_info.flags & VFIO_DEVICE_FLAGS_PCI)) {
- error_report("vfio: Um, this isn't a PCI device");
- goto error;
- }
-
- vdev->reset_works = !!(dev_info.flags & VFIO_DEVICE_FLAGS_RESET);
-
- if (dev_info.num_regions < VFIO_PCI_CONFIG_REGION_INDEX + 1) {
- error_report("vfio: unexpected number of io regions %u",
- dev_info.num_regions);
- goto error;
- }
-
- if (dev_info.num_irqs < VFIO_PCI_MSIX_IRQ_INDEX + 1) {
- error_report("vfio: unexpected number of irqs %u", dev_info.num_irqs);
- goto error;
- }
-
- for (i = VFIO_PCI_BAR0_REGION_INDEX; i < VFIO_PCI_ROM_REGION_INDEX; i++) {
- reg_info.index = i;
-
- ret = ioctl(vdev->fd, VFIO_DEVICE_GET_REGION_INFO, ®_info);
- if (ret) {
- error_report("vfio: Error getting region %d info: %m", i);
- goto error;
- }
-
- trace_vfio_get_device_region(name, i,
- (unsigned long)reg_info.size,
- (unsigned long)reg_info.offset,
- (unsigned long)reg_info.flags);
-
- vdev->bars[i].flags = reg_info.flags;
- vdev->bars[i].size = reg_info.size;
- vdev->bars[i].fd_offset = reg_info.offset;
- vdev->bars[i].fd = vdev->fd;
- vdev->bars[i].nr = i;
- QLIST_INIT(&vdev->bars[i].quirks);
- }
-
- reg_info.index = VFIO_PCI_CONFIG_REGION_INDEX;
-
- ret = ioctl(vdev->fd, VFIO_DEVICE_GET_REGION_INFO, ®_info);
- if (ret) {
- error_report("vfio: Error getting config info: %m");
- goto error;
- }
-
- trace_vfio_get_device_config(name, (unsigned long)reg_info.size,
- (unsigned long)reg_info.offset,
- (unsigned long)reg_info.flags);
-
- vdev->config_size = reg_info.size;
- if (vdev->config_size == PCI_CONFIG_SPACE_SIZE) {
- vdev->pdev.cap_present &= ~QEMU_PCI_CAP_EXPRESS;
- }
- vdev->config_offset = reg_info.offset;
-
- if ((vdev->features & VFIO_FEATURE_ENABLE_VGA) &&
- dev_info.num_regions > VFIO_PCI_VGA_REGION_INDEX) {
- struct vfio_region_info vga_info = {
- .argsz = sizeof(vga_info),
- .index = VFIO_PCI_VGA_REGION_INDEX,
- };
-
- ret = ioctl(vdev->fd, VFIO_DEVICE_GET_REGION_INFO, &vga_info);
- if (ret) {
- error_report(
- "vfio: Device does not support requested feature x-vga");
- goto error;
- }
-
- if (!(vga_info.flags & VFIO_REGION_INFO_FLAG_READ) ||
- !(vga_info.flags & VFIO_REGION_INFO_FLAG_WRITE) ||
- vga_info.size < 0xbffff + 1) {
- error_report("vfio: Unexpected VGA info, flags 0x%lx, size 0x%lx",
- (unsigned long)vga_info.flags,
- (unsigned long)vga_info.size);
- goto error;
- }
-
- vdev->vga.fd_offset = vga_info.offset;
- vdev->vga.fd = vdev->fd;
-
- vdev->vga.region[QEMU_PCI_VGA_MEM].offset = QEMU_PCI_VGA_MEM_BASE;
- vdev->vga.region[QEMU_PCI_VGA_MEM].nr = QEMU_PCI_VGA_MEM;
- QLIST_INIT(&vdev->vga.region[QEMU_PCI_VGA_MEM].quirks);
-
- vdev->vga.region[QEMU_PCI_VGA_IO_LO].offset = QEMU_PCI_VGA_IO_LO_BASE;
- vdev->vga.region[QEMU_PCI_VGA_IO_LO].nr = QEMU_PCI_VGA_IO_LO;
- QLIST_INIT(&vdev->vga.region[QEMU_PCI_VGA_IO_LO].quirks);
-
- vdev->vga.region[QEMU_PCI_VGA_IO_HI].offset = QEMU_PCI_VGA_IO_HI_BASE;
- vdev->vga.region[QEMU_PCI_VGA_IO_HI].nr = QEMU_PCI_VGA_IO_HI;
- QLIST_INIT(&vdev->vga.region[QEMU_PCI_VGA_IO_HI].quirks);
-
- vdev->has_vga = true;
- }
- irq_info.index = VFIO_PCI_ERR_IRQ_INDEX;
-
- ret = ioctl(vdev->fd, VFIO_DEVICE_GET_IRQ_INFO, &irq_info);
- if (ret) {
- /* This can fail for an old kernel or legacy PCI dev */
- trace_vfio_get_device_get_irq_info_failure();
- ret = 0;
- } else if (irq_info.count == 1) {
- vdev->pci_aer = true;
- } else {
- error_report("vfio: %04x:%02x:%02x.%x "
- "Could not enable error recovery for the device",
- vdev->host.domain, vdev->host.bus, vdev->host.slot,
- vdev->host.function);
- }
-
-error:
- if (ret) {
- QLIST_REMOVE(vdev, next);
- vdev->group = NULL;
- close(vdev->fd);
- }
- return ret;
-}
-
-static void vfio_put_device(VFIODevice *vdev)
-{
- QLIST_REMOVE(vdev, next);
- vdev->group = NULL;
- trace_vfio_put_device(vdev->fd);
- close(vdev->fd);
- if (vdev->msix) {
- g_free(vdev->msix);
- vdev->msix = NULL;
- }
-}
-
-static void vfio_err_notifier_handler(void *opaque)
-{
- VFIODevice *vdev = opaque;
-
- if (!event_notifier_test_and_clear(&vdev->err_notifier)) {
- return;
- }
-
- /*
- * TBD. Retrieve the error details and decide what action
- * needs to be taken. One of the actions could be to pass
- * the error to the guest and have the guest driver recover
- * from the error. This requires that PCIe capabilities be
- * exposed to the guest. For now, we just terminate the
- * guest to contain the error.
- */
-
- error_report("%s(%04x:%02x:%02x.%x) Unrecoverable error detected. "
- "Please collect any data possible and then kill the guest",
- __func__, vdev->host.domain, vdev->host.bus,
- vdev->host.slot, vdev->host.function);
-
- vm_stop(RUN_STATE_INTERNAL_ERROR);
-}
-
-/*
- * Registers error notifier for devices supporting error recovery.
- * If we encounter a failure in this function, we report an error
- * and continue after disabling error recovery support for the
- * device.
- */
-static void vfio_register_err_notifier(VFIODevice *vdev)
-{
- int ret;
- int argsz;
- struct vfio_irq_set *irq_set;
- int32_t *pfd;
-
- if (!vdev->pci_aer) {
- return;
- }
-
- if (event_notifier_init(&vdev->err_notifier, 0)) {
- error_report("vfio: Unable to init event notifier for error detection");
- vdev->pci_aer = false;
- return;
- }
-
- argsz = sizeof(*irq_set) + sizeof(*pfd);
-
- irq_set = g_malloc0(argsz);
- irq_set->argsz = argsz;
- irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD |
- VFIO_IRQ_SET_ACTION_TRIGGER;
- irq_set->index = VFIO_PCI_ERR_IRQ_INDEX;
- irq_set->start = 0;
- irq_set->count = 1;
- pfd = (int32_t *)&irq_set->data;
-
- *pfd = event_notifier_get_fd(&vdev->err_notifier);
- qemu_set_fd_handler(*pfd, vfio_err_notifier_handler, NULL, vdev);
-
- ret = ioctl(vdev->fd, VFIO_DEVICE_SET_IRQS, irq_set);
- if (ret) {
- error_report("vfio: Failed to set up error notification");
- qemu_set_fd_handler(*pfd, NULL, NULL, vdev);
- event_notifier_cleanup(&vdev->err_notifier);
- vdev->pci_aer = false;
- }
- g_free(irq_set);
-}
-
-static void vfio_unregister_err_notifier(VFIODevice *vdev)
-{
- int argsz;
- struct vfio_irq_set *irq_set;
- int32_t *pfd;
- int ret;
-
- if (!vdev->pci_aer) {
- return;
- }
-
- argsz = sizeof(*irq_set) + sizeof(*pfd);
-
- irq_set = g_malloc0(argsz);
- irq_set->argsz = argsz;
- irq_set->flags = VFIO_IRQ_SET_DATA_EVENTFD |
- VFIO_IRQ_SET_ACTION_TRIGGER;
- irq_set->index = VFIO_PCI_ERR_IRQ_INDEX;
- irq_set->start = 0;
- irq_set->count = 1;
- pfd = (int32_t *)&irq_set->data;
- *pfd = -1;
-
- ret = ioctl(vdev->fd, VFIO_DEVICE_SET_IRQS, irq_set);
- if (ret) {
- error_report("vfio: Failed to de-assign error fd: %m");
- }
- g_free(irq_set);
- qemu_set_fd_handler(event_notifier_get_fd(&vdev->err_notifier),
- NULL, NULL, vdev);
- event_notifier_cleanup(&vdev->err_notifier);
-}
-
-static int vfio_initfn(PCIDevice *pdev)
-{
- VFIODevice *pvdev, *vdev = DO_UPCAST(VFIODevice, pdev, pdev);
- VFIOGroup *group;
- char path[PATH_MAX], iommu_group_path[PATH_MAX], *group_name;
- ssize_t len;
- struct stat st;
- int groupid;
- int ret;
-
- /* Check that the host device exists */
- snprintf(path, sizeof(path),
- "/sys/bus/pci/devices/%04x:%02x:%02x.%01x/",
- vdev->host.domain, vdev->host.bus, vdev->host.slot,
- vdev->host.function);
- if (stat(path, &st) < 0) {
- error_report("vfio: error: no such host device: %s", path);
- return -errno;
- }
-
- strncat(path, "iommu_group", sizeof(path) - strlen(path) - 1);
-
- len = readlink(path, iommu_group_path, sizeof(path));
- if (len <= 0 || len >= sizeof(path)) {
- error_report("vfio: error no iommu_group for device");
- return len < 0 ? -errno : ENAMETOOLONG;
- }
-
- iommu_group_path[len] = 0;
- group_name = basename(iommu_group_path);
-
- if (sscanf(group_name, "%d", &groupid) != 1) {
- error_report("vfio: error reading %s: %m", path);
- return -errno;
- }
-
- trace_vfio_initfn(vdev->host.domain, vdev->host.bus,
- vdev->host.slot, vdev->host.function, groupid);
-
- group = vfio_get_group(groupid, pci_device_iommu_address_space(pdev));
- if (!group) {
- error_report("vfio: failed to get group %d", groupid);
- return -ENOENT;
- }
-
- snprintf(path, sizeof(path), "%04x:%02x:%02x.%01x",
- vdev->host.domain, vdev->host.bus, vdev->host.slot,
- vdev->host.function);
-
- QLIST_FOREACH(pvdev, &group->device_list, next) {
- if (pvdev->host.domain == vdev->host.domain &&
- pvdev->host.bus == vdev->host.bus &&
- pvdev->host.slot == vdev->host.slot &&
- pvdev->host.function == vdev->host.function) {
-
- error_report("vfio: error: device %s is already attached", path);
- vfio_put_group(group);
- return -EBUSY;
- }
- }
-
- ret = vfio_get_device(group, path, vdev);
- if (ret) {
- error_report("vfio: failed to get device %s", path);
- vfio_put_group(group);
- return ret;
- }
-
- /* Get a copy of config space */
- ret = pread(vdev->fd, vdev->pdev.config,
- MIN(pci_config_size(&vdev->pdev), vdev->config_size),
- vdev->config_offset);
- if (ret < (int)MIN(pci_config_size(&vdev->pdev), vdev->config_size)) {
- ret = ret < 0 ? -errno : -EFAULT;
- error_report("vfio: Failed to read device config space");
- goto out_put;
- }
-
- /* vfio emulates a lot for us, but some bits need extra love */
- vdev->emulated_config_bits = g_malloc0(vdev->config_size);
-
- /* QEMU can choose to expose the ROM or not */
- memset(vdev->emulated_config_bits + PCI_ROM_ADDRESS, 0xff, 4);
-
- /* QEMU can change multi-function devices to single function, or reverse */
- vdev->emulated_config_bits[PCI_HEADER_TYPE] =
- PCI_HEADER_TYPE_MULTI_FUNCTION;
-
- /* Restore or clear multifunction, this is always controlled by QEMU */
- if (vdev->pdev.cap_present & QEMU_PCI_CAP_MULTIFUNCTION) {
- vdev->pdev.config[PCI_HEADER_TYPE] |= PCI_HEADER_TYPE_MULTI_FUNCTION;
- } else {
- vdev->pdev.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(&vdev->pdev.config[PCI_BASE_ADDRESS_0], 0, 24);
- memset(&vdev->pdev.config[PCI_ROM_ADDRESS], 0, 4);
-
- vfio_pci_size_rom(vdev);
-
- ret = vfio_early_setup_msix(vdev);
- if (ret) {
- goto out_put;
- }
-
- vfio_map_bars(vdev);
-
- ret = vfio_add_capabilities(vdev);
- if (ret) {
- goto out_teardown;
- }
-
- /* QEMU emulates all of MSI & MSIX */
- if (pdev->cap_present & QEMU_PCI_CAP_MSIX) {
- memset(vdev->emulated_config_bits + pdev->msix_cap, 0xff,
- MSIX_CAP_LENGTH);
- }
-
- if (pdev->cap_present & QEMU_PCI_CAP_MSI) {
- memset(vdev->emulated_config_bits + pdev->msi_cap, 0xff,
- vdev->msi_cap_size);
- }
-
- if (vfio_pci_read_config(&vdev->pdev, PCI_INTERRUPT_PIN, 1)) {
- vdev->intx.mmap_timer = timer_new_ms(QEMU_CLOCK_VIRTUAL,
- vfio_intx_mmap_enable, vdev);
- pci_device_set_intx_routing_notifier(&vdev->pdev, vfio_update_irq);
- ret = vfio_enable_intx(vdev);
- if (ret) {
- goto out_teardown;
- }
- }
-
- vfio_register_err_notifier(vdev);
-
- return 0;
-
-out_teardown:
- pci_device_set_intx_routing_notifier(&vdev->pdev, NULL);
- vfio_teardown_msi(vdev);
- vfio_unmap_bars(vdev);
-out_put:
- g_free(vdev->emulated_config_bits);
- vfio_put_device(vdev);
- vfio_put_group(group);
- return ret;
-}
-
-static void vfio_exitfn(PCIDevice *pdev)
-{
- VFIODevice *vdev = DO_UPCAST(VFIODevice, pdev, pdev);
- VFIOGroup *group = vdev->group;
-
- vfio_unregister_err_notifier(vdev);
- pci_device_set_intx_routing_notifier(&vdev->pdev, NULL);
- vfio_disable_interrupts(vdev);
- if (vdev->intx.mmap_timer) {
- timer_free(vdev->intx.mmap_timer);
- }
- vfio_teardown_msi(vdev);
- vfio_unmap_bars(vdev);
- g_free(vdev->emulated_config_bits);
- g_free(vdev->rom);
- vfio_put_device(vdev);
- vfio_put_group(group);
-}
-
-static void vfio_pci_reset(DeviceState *dev)
-{
- PCIDevice *pdev = DO_UPCAST(PCIDevice, qdev, dev);
- VFIODevice *vdev = DO_UPCAST(VFIODevice, pdev, pdev);
-
- trace_vfio_pci_reset(vdev->host.domain, vdev->host.bus,
- vdev->host.slot, vdev->host.function);
-
- vfio_pci_pre_reset(vdev);
-
- if (vdev->reset_works && (vdev->has_flr || !vdev->has_pm_reset) &&
- !ioctl(vdev->fd, VFIO_DEVICE_RESET)) {
- trace_vfio_pci_reset_flr(vdev->host.domain, vdev->host.bus,
- vdev->host.slot, vdev->host.function);
- goto post_reset;
- }
-
- /* See if we can do our own bus reset */
- if (!vfio_pci_hot_reset_one(vdev)) {
- goto post_reset;
- }
-
- /* If nothing else works and the device supports PM reset, use it */
- if (vdev->reset_works && vdev->has_pm_reset &&
- !ioctl(vdev->fd, VFIO_DEVICE_RESET)) {
- trace_vfio_pci_reset_pm(vdev->host.domain, vdev->host.bus,
- vdev->host.slot, vdev->host.function);
- goto post_reset;
- }
-
-post_reset:
- vfio_pci_post_reset(vdev);
-}
-
-static void vfio_instance_init(Object *obj)
-{
- PCIDevice *pci_dev = PCI_DEVICE(obj);
- VFIODevice *vdev = DO_UPCAST(VFIODevice, pdev, PCI_DEVICE(obj));
-
- device_add_bootindex_property(obj, &vdev->bootindex,
- "bootindex", NULL,
- &pci_dev->qdev, NULL);
-}
-
-static Property vfio_pci_dev_properties[] = {
- DEFINE_PROP_PCI_HOST_DEVADDR("host", VFIODevice, host),
- DEFINE_PROP_UINT32("x-intx-mmap-timeout-ms", VFIODevice,
- intx.mmap_timeout, 1100),
- DEFINE_PROP_BIT("x-vga", VFIODevice, features,
- VFIO_FEATURE_ENABLE_VGA_BIT, false),
- /*
- * TODO - support passed fds... is this necessary?
- * DEFINE_PROP_STRING("vfiofd", VFIODevice, vfiofd_name),
- * DEFINE_PROP_STRING("vfiogroupfd, VFIODevice, vfiogroupfd_name),
- */
- DEFINE_PROP_END_OF_LIST(),
-};
-
-static const VMStateDescription vfio_pci_vmstate = {
- .name = "vfio-pci",
- .unmigratable = 1,
-};
-
-static void vfio_pci_dev_class_init(ObjectClass *klass, void *data)
-{
- DeviceClass *dc = DEVICE_CLASS(klass);
- PCIDeviceClass *pdc = PCI_DEVICE_CLASS(klass);
-
- dc->reset = vfio_pci_reset;
- dc->props = vfio_pci_dev_properties;
- dc->vmsd = &vfio_pci_vmstate;
- dc->desc = "VFIO-based PCI device assignment";
- set_bit(DEVICE_CATEGORY_MISC, dc->categories);
- pdc->init = vfio_initfn;
- pdc->exit = vfio_exitfn;
- pdc->config_read = vfio_pci_read_config;
- pdc->config_write = vfio_pci_write_config;
- pdc->is_express = 1; /* We might be */
-}
-
-static const TypeInfo vfio_pci_dev_info = {
- .name = "vfio-pci",
- .parent = TYPE_PCI_DEVICE,
- .instance_size = sizeof(VFIODevice),
- .class_init = vfio_pci_dev_class_init,
- .instance_init = vfio_instance_init,
-};
-
-static void register_vfio_pci_dev_type(void)
-{
- type_register_static(&vfio_pci_dev_info);
-}
-
-type_init(register_vfio_pci_dev_type)
-
-static int vfio_container_do_ioctl(AddressSpace *as, int32_t groupid,
- int req, void *param)
-{
- VFIOGroup *group;
- VFIOContainer *container;
- int ret = -1;
-
- group = vfio_get_group(groupid, as);
- if (!group) {
- error_report("vfio: group %d not registered", groupid);
- return ret;
- }
-
- container = group->container;
- if (group->container) {
- ret = ioctl(container->fd, req, param);
- if (ret < 0) {
- error_report("vfio: failed to ioctl container: ret=%d, %s",
- ret, strerror(errno));
- }
- }
-
- vfio_put_group(group);
-
- return ret;
-}
-
-int vfio_container_ioctl(AddressSpace *as, int32_t groupid,
- int req, void *param)
-{
- /* We allow only certain ioctls to the container */
- switch (req) {
- case VFIO_CHECK_EXTENSION:
- case VFIO_IOMMU_SPAPR_TCE_GET_INFO:
- break;
- default:
- /* Return an error on unknown requests */
- error_report("vfio: unsupported ioctl %X", req);
- return -1;
- }
-
- return vfio_container_do_ioctl(as, groupid, req, param);
-}
projects / mirror_qemu.git / commitdiff