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614e41bc26
Decouple another x86-specific assumption about what irqchips imply. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Avi Kivity <avi@redhat.com>
1077 lines
33 KiB
C
1077 lines
33 KiB
C
/*
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* Virtio PCI Bindings
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*
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* Copyright IBM, Corp. 2007
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* Copyright (c) 2009 CodeSourcery
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*
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* Authors:
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* Anthony Liguori <aliguori@us.ibm.com>
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* Paul Brook <paul@codesourcery.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*
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* Contributions after 2012-01-13 are licensed under the terms of the
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* GNU GPL, version 2 or (at your option) any later version.
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*/
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#include <inttypes.h>
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#include "virtio.h"
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#include "virtio-blk.h"
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#include "virtio-net.h"
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#include "virtio-serial.h"
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#include "virtio-scsi.h"
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#include "pci.h"
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#include "qemu-error.h"
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#include "msi.h"
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#include "msix.h"
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#include "net.h"
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#include "loader.h"
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#include "kvm.h"
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#include "blockdev.h"
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#include "virtio-pci.h"
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#include "range.h"
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/* from Linux's linux/virtio_pci.h */
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/* A 32-bit r/o bitmask of the features supported by the host */
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#define VIRTIO_PCI_HOST_FEATURES 0
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/* A 32-bit r/w bitmask of features activated by the guest */
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#define VIRTIO_PCI_GUEST_FEATURES 4
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/* A 32-bit r/w PFN for the currently selected queue */
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#define VIRTIO_PCI_QUEUE_PFN 8
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/* A 16-bit r/o queue size for the currently selected queue */
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#define VIRTIO_PCI_QUEUE_NUM 12
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/* A 16-bit r/w queue selector */
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#define VIRTIO_PCI_QUEUE_SEL 14
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/* A 16-bit r/w queue notifier */
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#define VIRTIO_PCI_QUEUE_NOTIFY 16
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/* An 8-bit device status register. */
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#define VIRTIO_PCI_STATUS 18
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/* An 8-bit r/o interrupt status register. Reading the value will return the
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* current contents of the ISR and will also clear it. This is effectively
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* a read-and-acknowledge. */
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#define VIRTIO_PCI_ISR 19
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/* MSI-X registers: only enabled if MSI-X is enabled. */
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/* A 16-bit vector for configuration changes. */
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#define VIRTIO_MSI_CONFIG_VECTOR 20
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/* A 16-bit vector for selected queue notifications. */
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#define VIRTIO_MSI_QUEUE_VECTOR 22
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/* Config space size */
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#define VIRTIO_PCI_CONFIG_NOMSI 20
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#define VIRTIO_PCI_CONFIG_MSI 24
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#define VIRTIO_PCI_REGION_SIZE(dev) (msix_present(dev) ? \
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VIRTIO_PCI_CONFIG_MSI : \
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VIRTIO_PCI_CONFIG_NOMSI)
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/* The remaining space is defined by each driver as the per-driver
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* configuration space */
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#define VIRTIO_PCI_CONFIG(dev) (msix_enabled(dev) ? \
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VIRTIO_PCI_CONFIG_MSI : \
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VIRTIO_PCI_CONFIG_NOMSI)
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/* How many bits to shift physical queue address written to QUEUE_PFN.
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* 12 is historical, and due to x86 page size. */
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#define VIRTIO_PCI_QUEUE_ADDR_SHIFT 12
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/* Flags track per-device state like workarounds for quirks in older guests. */
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#define VIRTIO_PCI_FLAG_BUS_MASTER_BUG (1 << 0)
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/* QEMU doesn't strictly need write barriers since everything runs in
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* lock-step. We'll leave the calls to wmb() in though to make it obvious for
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* KVM or if kqemu gets SMP support.
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*/
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#define wmb() do { } while (0)
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/* HACK for virtio to determine if it's running a big endian guest */
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bool virtio_is_big_endian(void);
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/* virtio device */
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static void virtio_pci_notify(void *opaque, uint16_t vector)
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{
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VirtIOPCIProxy *proxy = opaque;
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if (msix_enabled(&proxy->pci_dev))
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msix_notify(&proxy->pci_dev, vector);
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else
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qemu_set_irq(proxy->pci_dev.irq[0], proxy->vdev->isr & 1);
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}
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static void virtio_pci_save_config(void * opaque, QEMUFile *f)
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{
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VirtIOPCIProxy *proxy = opaque;
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pci_device_save(&proxy->pci_dev, f);
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msix_save(&proxy->pci_dev, f);
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if (msix_present(&proxy->pci_dev))
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qemu_put_be16(f, proxy->vdev->config_vector);
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}
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static void virtio_pci_save_queue(void * opaque, int n, QEMUFile *f)
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{
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VirtIOPCIProxy *proxy = opaque;
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if (msix_present(&proxy->pci_dev))
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qemu_put_be16(f, virtio_queue_vector(proxy->vdev, n));
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}
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static int virtio_pci_load_config(void * opaque, QEMUFile *f)
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{
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VirtIOPCIProxy *proxy = opaque;
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int ret;
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ret = pci_device_load(&proxy->pci_dev, f);
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if (ret) {
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return ret;
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}
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msix_load(&proxy->pci_dev, f);
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if (msix_present(&proxy->pci_dev)) {
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qemu_get_be16s(f, &proxy->vdev->config_vector);
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} else {
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proxy->vdev->config_vector = VIRTIO_NO_VECTOR;
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}
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if (proxy->vdev->config_vector != VIRTIO_NO_VECTOR) {
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return msix_vector_use(&proxy->pci_dev, proxy->vdev->config_vector);
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}
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return 0;
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}
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static int virtio_pci_load_queue(void * opaque, int n, QEMUFile *f)
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{
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VirtIOPCIProxy *proxy = opaque;
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uint16_t vector;
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if (msix_present(&proxy->pci_dev)) {
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qemu_get_be16s(f, &vector);
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} else {
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vector = VIRTIO_NO_VECTOR;
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}
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virtio_queue_set_vector(proxy->vdev, n, vector);
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if (vector != VIRTIO_NO_VECTOR) {
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return msix_vector_use(&proxy->pci_dev, vector);
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}
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return 0;
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}
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static int virtio_pci_set_host_notifier_internal(VirtIOPCIProxy *proxy,
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int n, bool assign, bool set_handler)
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{
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VirtQueue *vq = virtio_get_queue(proxy->vdev, n);
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EventNotifier *notifier = virtio_queue_get_host_notifier(vq);
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int r = 0;
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if (assign) {
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r = event_notifier_init(notifier, 1);
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if (r < 0) {
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error_report("%s: unable to init event notifier: %d",
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__func__, r);
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return r;
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}
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virtio_queue_set_host_notifier_fd_handler(vq, true, set_handler);
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memory_region_add_eventfd(&proxy->bar, VIRTIO_PCI_QUEUE_NOTIFY, 2,
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true, n, notifier);
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} else {
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memory_region_del_eventfd(&proxy->bar, VIRTIO_PCI_QUEUE_NOTIFY, 2,
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true, n, notifier);
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virtio_queue_set_host_notifier_fd_handler(vq, false, false);
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event_notifier_cleanup(notifier);
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}
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return r;
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}
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static void virtio_pci_start_ioeventfd(VirtIOPCIProxy *proxy)
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{
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int n, r;
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if (!(proxy->flags & VIRTIO_PCI_FLAG_USE_IOEVENTFD) ||
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proxy->ioeventfd_disabled ||
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proxy->ioeventfd_started) {
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return;
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}
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for (n = 0; n < VIRTIO_PCI_QUEUE_MAX; n++) {
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if (!virtio_queue_get_num(proxy->vdev, n)) {
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continue;
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}
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r = virtio_pci_set_host_notifier_internal(proxy, n, true, true);
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if (r < 0) {
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goto assign_error;
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}
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}
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proxy->ioeventfd_started = true;
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return;
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assign_error:
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while (--n >= 0) {
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if (!virtio_queue_get_num(proxy->vdev, n)) {
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continue;
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}
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r = virtio_pci_set_host_notifier_internal(proxy, n, false, false);
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assert(r >= 0);
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}
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proxy->ioeventfd_started = false;
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error_report("%s: failed. Fallback to a userspace (slower).", __func__);
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}
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static void virtio_pci_stop_ioeventfd(VirtIOPCIProxy *proxy)
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{
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int r;
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int n;
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if (!proxy->ioeventfd_started) {
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return;
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}
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for (n = 0; n < VIRTIO_PCI_QUEUE_MAX; n++) {
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if (!virtio_queue_get_num(proxy->vdev, n)) {
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continue;
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}
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r = virtio_pci_set_host_notifier_internal(proxy, n, false, false);
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assert(r >= 0);
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}
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proxy->ioeventfd_started = false;
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}
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void virtio_pci_reset(DeviceState *d)
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{
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VirtIOPCIProxy *proxy = container_of(d, VirtIOPCIProxy, pci_dev.qdev);
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virtio_pci_stop_ioeventfd(proxy);
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virtio_reset(proxy->vdev);
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proxy->flags &= ~VIRTIO_PCI_FLAG_BUS_MASTER_BUG;
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}
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static void virtio_ioport_write(void *opaque, uint32_t addr, uint32_t val)
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{
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VirtIOPCIProxy *proxy = opaque;
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VirtIODevice *vdev = proxy->vdev;
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target_phys_addr_t pa;
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switch (addr) {
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case VIRTIO_PCI_GUEST_FEATURES:
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/* Guest does not negotiate properly? We have to assume nothing. */
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if (val & (1 << VIRTIO_F_BAD_FEATURE)) {
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val = vdev->bad_features ? vdev->bad_features(vdev) : 0;
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}
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virtio_set_features(vdev, val);
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break;
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case VIRTIO_PCI_QUEUE_PFN:
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pa = (target_phys_addr_t)val << VIRTIO_PCI_QUEUE_ADDR_SHIFT;
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if (pa == 0) {
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virtio_pci_stop_ioeventfd(proxy);
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virtio_reset(proxy->vdev);
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msix_unuse_all_vectors(&proxy->pci_dev);
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}
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else
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virtio_queue_set_addr(vdev, vdev->queue_sel, pa);
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break;
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case VIRTIO_PCI_QUEUE_SEL:
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if (val < VIRTIO_PCI_QUEUE_MAX)
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vdev->queue_sel = val;
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break;
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case VIRTIO_PCI_QUEUE_NOTIFY:
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if (val < VIRTIO_PCI_QUEUE_MAX) {
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virtio_queue_notify(vdev, val);
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}
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break;
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case VIRTIO_PCI_STATUS:
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if (!(val & VIRTIO_CONFIG_S_DRIVER_OK)) {
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virtio_pci_stop_ioeventfd(proxy);
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}
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virtio_set_status(vdev, val & 0xFF);
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if (val & VIRTIO_CONFIG_S_DRIVER_OK) {
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virtio_pci_start_ioeventfd(proxy);
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}
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if (vdev->status == 0) {
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virtio_reset(proxy->vdev);
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msix_unuse_all_vectors(&proxy->pci_dev);
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}
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/* Linux before 2.6.34 sets the device as OK without enabling
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the PCI device bus master bit. In this case we need to disable
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some safety checks. */
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if ((val & VIRTIO_CONFIG_S_DRIVER_OK) &&
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!(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) {
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proxy->flags |= VIRTIO_PCI_FLAG_BUS_MASTER_BUG;
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}
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break;
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case VIRTIO_MSI_CONFIG_VECTOR:
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msix_vector_unuse(&proxy->pci_dev, vdev->config_vector);
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/* Make it possible for guest to discover an error took place. */
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if (msix_vector_use(&proxy->pci_dev, val) < 0)
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val = VIRTIO_NO_VECTOR;
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vdev->config_vector = val;
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break;
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case VIRTIO_MSI_QUEUE_VECTOR:
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msix_vector_unuse(&proxy->pci_dev,
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virtio_queue_vector(vdev, vdev->queue_sel));
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/* Make it possible for guest to discover an error took place. */
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if (msix_vector_use(&proxy->pci_dev, val) < 0)
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val = VIRTIO_NO_VECTOR;
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virtio_queue_set_vector(vdev, vdev->queue_sel, val);
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break;
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default:
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error_report("%s: unexpected address 0x%x value 0x%x",
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__func__, addr, val);
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break;
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}
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}
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static uint32_t virtio_ioport_read(VirtIOPCIProxy *proxy, uint32_t addr)
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{
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VirtIODevice *vdev = proxy->vdev;
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uint32_t ret = 0xFFFFFFFF;
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switch (addr) {
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case VIRTIO_PCI_HOST_FEATURES:
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ret = proxy->host_features;
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break;
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case VIRTIO_PCI_GUEST_FEATURES:
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ret = vdev->guest_features;
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break;
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case VIRTIO_PCI_QUEUE_PFN:
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ret = virtio_queue_get_addr(vdev, vdev->queue_sel)
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>> VIRTIO_PCI_QUEUE_ADDR_SHIFT;
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break;
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case VIRTIO_PCI_QUEUE_NUM:
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ret = virtio_queue_get_num(vdev, vdev->queue_sel);
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break;
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case VIRTIO_PCI_QUEUE_SEL:
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ret = vdev->queue_sel;
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break;
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case VIRTIO_PCI_STATUS:
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ret = vdev->status;
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break;
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case VIRTIO_PCI_ISR:
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/* reading from the ISR also clears it. */
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ret = vdev->isr;
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vdev->isr = 0;
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qemu_set_irq(proxy->pci_dev.irq[0], 0);
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break;
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case VIRTIO_MSI_CONFIG_VECTOR:
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ret = vdev->config_vector;
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break;
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case VIRTIO_MSI_QUEUE_VECTOR:
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ret = virtio_queue_vector(vdev, vdev->queue_sel);
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break;
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default:
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break;
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}
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return ret;
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}
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static uint32_t virtio_pci_config_readb(void *opaque, uint32_t addr)
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{
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VirtIOPCIProxy *proxy = opaque;
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uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
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if (addr < config)
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return virtio_ioport_read(proxy, addr);
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addr -= config;
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return virtio_config_readb(proxy->vdev, addr);
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}
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static uint32_t virtio_pci_config_readw(void *opaque, uint32_t addr)
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{
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VirtIOPCIProxy *proxy = opaque;
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uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
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uint16_t val;
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if (addr < config)
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return virtio_ioport_read(proxy, addr);
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addr -= config;
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val = virtio_config_readw(proxy->vdev, addr);
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if (virtio_is_big_endian()) {
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/*
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* virtio is odd, ioports are LE but config space is target native
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* endian. However, in qemu, all PIO is LE, so we need to re-swap
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* on BE targets
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*/
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val = bswap16(val);
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}
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return val;
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}
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static uint32_t virtio_pci_config_readl(void *opaque, uint32_t addr)
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{
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VirtIOPCIProxy *proxy = opaque;
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uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
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uint32_t val;
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if (addr < config)
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return virtio_ioport_read(proxy, addr);
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addr -= config;
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val = virtio_config_readl(proxy->vdev, addr);
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if (virtio_is_big_endian()) {
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val = bswap32(val);
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}
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return val;
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}
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static void virtio_pci_config_writeb(void *opaque, uint32_t addr, uint32_t val)
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{
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VirtIOPCIProxy *proxy = opaque;
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uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
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if (addr < config) {
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virtio_ioport_write(proxy, addr, val);
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return;
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}
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addr -= config;
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virtio_config_writeb(proxy->vdev, addr, val);
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}
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static void virtio_pci_config_writew(void *opaque, uint32_t addr, uint32_t val)
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{
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VirtIOPCIProxy *proxy = opaque;
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uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
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if (addr < config) {
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virtio_ioport_write(proxy, addr, val);
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return;
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}
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addr -= config;
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if (virtio_is_big_endian()) {
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val = bswap16(val);
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}
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virtio_config_writew(proxy->vdev, addr, val);
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}
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static void virtio_pci_config_writel(void *opaque, uint32_t addr, uint32_t val)
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{
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VirtIOPCIProxy *proxy = opaque;
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uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev);
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if (addr < config) {
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virtio_ioport_write(proxy, addr, val);
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return;
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}
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addr -= config;
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if (virtio_is_big_endian()) {
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val = bswap32(val);
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}
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virtio_config_writel(proxy->vdev, addr, val);
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}
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static const MemoryRegionPortio virtio_portio[] = {
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{ 0, 0x10000, 1, .write = virtio_pci_config_writeb, },
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{ 0, 0x10000, 2, .write = virtio_pci_config_writew, },
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{ 0, 0x10000, 4, .write = virtio_pci_config_writel, },
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{ 0, 0x10000, 1, .read = virtio_pci_config_readb, },
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{ 0, 0x10000, 2, .read = virtio_pci_config_readw, },
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{ 0, 0x10000, 4, .read = virtio_pci_config_readl, },
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PORTIO_END_OF_LIST()
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};
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static const MemoryRegionOps virtio_pci_config_ops = {
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.old_portio = virtio_portio,
|
|
.endianness = DEVICE_LITTLE_ENDIAN,
|
|
};
|
|
|
|
static void virtio_write_config(PCIDevice *pci_dev, uint32_t address,
|
|
uint32_t val, int len)
|
|
{
|
|
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
|
|
|
|
pci_default_write_config(pci_dev, address, val, len);
|
|
|
|
if (range_covers_byte(address, len, PCI_COMMAND) &&
|
|
!(pci_dev->config[PCI_COMMAND] & PCI_COMMAND_MASTER) &&
|
|
!(proxy->flags & VIRTIO_PCI_FLAG_BUS_MASTER_BUG)) {
|
|
virtio_pci_stop_ioeventfd(proxy);
|
|
virtio_set_status(proxy->vdev,
|
|
proxy->vdev->status & ~VIRTIO_CONFIG_S_DRIVER_OK);
|
|
}
|
|
}
|
|
|
|
static unsigned virtio_pci_get_features(void *opaque)
|
|
{
|
|
VirtIOPCIProxy *proxy = opaque;
|
|
return proxy->host_features;
|
|
}
|
|
|
|
static int kvm_virtio_pci_vq_vector_use(VirtIOPCIProxy *proxy,
|
|
unsigned int queue_no,
|
|
unsigned int vector,
|
|
MSIMessage msg)
|
|
{
|
|
VirtQueue *vq = virtio_get_queue(proxy->vdev, queue_no);
|
|
EventNotifier *n = virtio_queue_get_guest_notifier(vq);
|
|
VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
|
|
int ret;
|
|
|
|
if (irqfd->users == 0) {
|
|
ret = kvm_irqchip_add_msi_route(kvm_state, msg);
|
|
if (ret < 0) {
|
|
return ret;
|
|
}
|
|
irqfd->virq = ret;
|
|
}
|
|
irqfd->users++;
|
|
|
|
ret = kvm_irqchip_add_irq_notifier(kvm_state, n, irqfd->virq);
|
|
if (ret < 0) {
|
|
if (--irqfd->users == 0) {
|
|
kvm_irqchip_release_virq(kvm_state, irqfd->virq);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
virtio_queue_set_guest_notifier_fd_handler(vq, true, true);
|
|
return 0;
|
|
}
|
|
|
|
static void kvm_virtio_pci_vq_vector_release(VirtIOPCIProxy *proxy,
|
|
unsigned int queue_no,
|
|
unsigned int vector)
|
|
{
|
|
VirtQueue *vq = virtio_get_queue(proxy->vdev, queue_no);
|
|
EventNotifier *n = virtio_queue_get_guest_notifier(vq);
|
|
VirtIOIRQFD *irqfd = &proxy->vector_irqfd[vector];
|
|
int ret;
|
|
|
|
ret = kvm_irqchip_remove_irq_notifier(kvm_state, n, irqfd->virq);
|
|
assert(ret == 0);
|
|
|
|
if (--irqfd->users == 0) {
|
|
kvm_irqchip_release_virq(kvm_state, irqfd->virq);
|
|
}
|
|
|
|
virtio_queue_set_guest_notifier_fd_handler(vq, true, false);
|
|
}
|
|
|
|
static int kvm_virtio_pci_vector_use(PCIDevice *dev, unsigned vector,
|
|
MSIMessage msg)
|
|
{
|
|
VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev);
|
|
VirtIODevice *vdev = proxy->vdev;
|
|
int ret, queue_no;
|
|
|
|
for (queue_no = 0; queue_no < VIRTIO_PCI_QUEUE_MAX; queue_no++) {
|
|
if (!virtio_queue_get_num(vdev, queue_no)) {
|
|
break;
|
|
}
|
|
if (virtio_queue_vector(vdev, queue_no) != vector) {
|
|
continue;
|
|
}
|
|
ret = kvm_virtio_pci_vq_vector_use(proxy, queue_no, vector, msg);
|
|
if (ret < 0) {
|
|
goto undo;
|
|
}
|
|
}
|
|
return 0;
|
|
|
|
undo:
|
|
while (--queue_no >= 0) {
|
|
if (virtio_queue_vector(vdev, queue_no) != vector) {
|
|
continue;
|
|
}
|
|
kvm_virtio_pci_vq_vector_release(proxy, queue_no, vector);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static void kvm_virtio_pci_vector_release(PCIDevice *dev, unsigned vector)
|
|
{
|
|
VirtIOPCIProxy *proxy = container_of(dev, VirtIOPCIProxy, pci_dev);
|
|
VirtIODevice *vdev = proxy->vdev;
|
|
int queue_no;
|
|
|
|
for (queue_no = 0; queue_no < VIRTIO_PCI_QUEUE_MAX; queue_no++) {
|
|
if (!virtio_queue_get_num(vdev, queue_no)) {
|
|
break;
|
|
}
|
|
if (virtio_queue_vector(vdev, queue_no) != vector) {
|
|
continue;
|
|
}
|
|
kvm_virtio_pci_vq_vector_release(proxy, queue_no, vector);
|
|
}
|
|
}
|
|
|
|
static int virtio_pci_set_guest_notifier(void *opaque, int n, bool assign)
|
|
{
|
|
VirtIOPCIProxy *proxy = opaque;
|
|
VirtQueue *vq = virtio_get_queue(proxy->vdev, n);
|
|
EventNotifier *notifier = virtio_queue_get_guest_notifier(vq);
|
|
|
|
if (assign) {
|
|
int r = event_notifier_init(notifier, 0);
|
|
if (r < 0) {
|
|
return r;
|
|
}
|
|
virtio_queue_set_guest_notifier_fd_handler(vq, true, false);
|
|
} else {
|
|
virtio_queue_set_guest_notifier_fd_handler(vq, false, false);
|
|
event_notifier_cleanup(notifier);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static bool virtio_pci_query_guest_notifiers(void *opaque)
|
|
{
|
|
VirtIOPCIProxy *proxy = opaque;
|
|
return msix_enabled(&proxy->pci_dev);
|
|
}
|
|
|
|
static int virtio_pci_set_guest_notifiers(void *opaque, bool assign)
|
|
{
|
|
VirtIOPCIProxy *proxy = opaque;
|
|
VirtIODevice *vdev = proxy->vdev;
|
|
int r, n;
|
|
|
|
/* Must unset vector notifier while guest notifier is still assigned */
|
|
if (kvm_msi_via_irqfd_enabled() && !assign) {
|
|
msix_unset_vector_notifiers(&proxy->pci_dev);
|
|
g_free(proxy->vector_irqfd);
|
|
proxy->vector_irqfd = NULL;
|
|
}
|
|
|
|
for (n = 0; n < VIRTIO_PCI_QUEUE_MAX; n++) {
|
|
if (!virtio_queue_get_num(vdev, n)) {
|
|
break;
|
|
}
|
|
|
|
r = virtio_pci_set_guest_notifier(opaque, n, assign);
|
|
if (r < 0) {
|
|
goto assign_error;
|
|
}
|
|
}
|
|
|
|
/* Must set vector notifier after guest notifier has been assigned */
|
|
if (kvm_msi_via_irqfd_enabled() && assign) {
|
|
proxy->vector_irqfd =
|
|
g_malloc0(sizeof(*proxy->vector_irqfd) *
|
|
msix_nr_vectors_allocated(&proxy->pci_dev));
|
|
r = msix_set_vector_notifiers(&proxy->pci_dev,
|
|
kvm_virtio_pci_vector_use,
|
|
kvm_virtio_pci_vector_release);
|
|
if (r < 0) {
|
|
goto assign_error;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
|
|
assign_error:
|
|
/* We get here on assignment failure. Recover by undoing for VQs 0 .. n. */
|
|
assert(assign);
|
|
while (--n >= 0) {
|
|
virtio_pci_set_guest_notifier(opaque, n, !assign);
|
|
}
|
|
return r;
|
|
}
|
|
|
|
static int virtio_pci_set_host_notifier(void *opaque, int n, bool assign)
|
|
{
|
|
VirtIOPCIProxy *proxy = opaque;
|
|
|
|
/* Stop using ioeventfd for virtqueue kick if the device starts using host
|
|
* notifiers. This makes it easy to avoid stepping on each others' toes.
|
|
*/
|
|
proxy->ioeventfd_disabled = assign;
|
|
if (assign) {
|
|
virtio_pci_stop_ioeventfd(proxy);
|
|
}
|
|
/* We don't need to start here: it's not needed because backend
|
|
* currently only stops on status change away from ok,
|
|
* reset, vmstop and such. If we do add code to start here,
|
|
* need to check vmstate, device state etc. */
|
|
return virtio_pci_set_host_notifier_internal(proxy, n, assign, false);
|
|
}
|
|
|
|
static void virtio_pci_vmstate_change(void *opaque, bool running)
|
|
{
|
|
VirtIOPCIProxy *proxy = opaque;
|
|
|
|
if (running) {
|
|
/* Try to find out if the guest has bus master disabled, but is
|
|
in ready state. Then we have a buggy guest OS. */
|
|
if ((proxy->vdev->status & VIRTIO_CONFIG_S_DRIVER_OK) &&
|
|
!(proxy->pci_dev.config[PCI_COMMAND] & PCI_COMMAND_MASTER)) {
|
|
proxy->flags |= VIRTIO_PCI_FLAG_BUS_MASTER_BUG;
|
|
}
|
|
virtio_pci_start_ioeventfd(proxy);
|
|
} else {
|
|
virtio_pci_stop_ioeventfd(proxy);
|
|
}
|
|
}
|
|
|
|
static const VirtIOBindings virtio_pci_bindings = {
|
|
.notify = virtio_pci_notify,
|
|
.save_config = virtio_pci_save_config,
|
|
.load_config = virtio_pci_load_config,
|
|
.save_queue = virtio_pci_save_queue,
|
|
.load_queue = virtio_pci_load_queue,
|
|
.get_features = virtio_pci_get_features,
|
|
.query_guest_notifiers = virtio_pci_query_guest_notifiers,
|
|
.set_host_notifier = virtio_pci_set_host_notifier,
|
|
.set_guest_notifiers = virtio_pci_set_guest_notifiers,
|
|
.vmstate_change = virtio_pci_vmstate_change,
|
|
};
|
|
|
|
void virtio_init_pci(VirtIOPCIProxy *proxy, VirtIODevice *vdev)
|
|
{
|
|
uint8_t *config;
|
|
uint32_t size;
|
|
|
|
proxy->vdev = vdev;
|
|
|
|
config = proxy->pci_dev.config;
|
|
|
|
if (proxy->class_code) {
|
|
pci_config_set_class(config, proxy->class_code);
|
|
}
|
|
pci_set_word(config + PCI_SUBSYSTEM_VENDOR_ID,
|
|
pci_get_word(config + PCI_VENDOR_ID));
|
|
pci_set_word(config + PCI_SUBSYSTEM_ID, vdev->device_id);
|
|
config[PCI_INTERRUPT_PIN] = 1;
|
|
|
|
if (vdev->nvectors &&
|
|
msix_init_exclusive_bar(&proxy->pci_dev, vdev->nvectors, 1)) {
|
|
vdev->nvectors = 0;
|
|
}
|
|
|
|
proxy->pci_dev.config_write = virtio_write_config;
|
|
|
|
size = VIRTIO_PCI_REGION_SIZE(&proxy->pci_dev) + vdev->config_len;
|
|
if (size & (size-1))
|
|
size = 1 << qemu_fls(size);
|
|
|
|
memory_region_init_io(&proxy->bar, &virtio_pci_config_ops, proxy,
|
|
"virtio-pci", size);
|
|
pci_register_bar(&proxy->pci_dev, 0, PCI_BASE_ADDRESS_SPACE_IO,
|
|
&proxy->bar);
|
|
|
|
if (!kvm_has_many_ioeventfds()) {
|
|
proxy->flags &= ~VIRTIO_PCI_FLAG_USE_IOEVENTFD;
|
|
}
|
|
|
|
virtio_bind_device(vdev, &virtio_pci_bindings, proxy);
|
|
proxy->host_features |= 0x1 << VIRTIO_F_NOTIFY_ON_EMPTY;
|
|
proxy->host_features |= 0x1 << VIRTIO_F_BAD_FEATURE;
|
|
proxy->host_features = vdev->get_features(vdev, proxy->host_features);
|
|
}
|
|
|
|
static int virtio_blk_init_pci(PCIDevice *pci_dev)
|
|
{
|
|
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
|
|
VirtIODevice *vdev;
|
|
|
|
if (proxy->class_code != PCI_CLASS_STORAGE_SCSI &&
|
|
proxy->class_code != PCI_CLASS_STORAGE_OTHER)
|
|
proxy->class_code = PCI_CLASS_STORAGE_SCSI;
|
|
|
|
vdev = virtio_blk_init(&pci_dev->qdev, &proxy->blk);
|
|
if (!vdev) {
|
|
return -1;
|
|
}
|
|
vdev->nvectors = proxy->nvectors;
|
|
virtio_init_pci(proxy, vdev);
|
|
/* make the actual value visible */
|
|
proxy->nvectors = vdev->nvectors;
|
|
return 0;
|
|
}
|
|
|
|
static void virtio_exit_pci(PCIDevice *pci_dev)
|
|
{
|
|
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
|
|
|
|
memory_region_destroy(&proxy->bar);
|
|
msix_uninit_exclusive_bar(pci_dev);
|
|
}
|
|
|
|
static void virtio_blk_exit_pci(PCIDevice *pci_dev)
|
|
{
|
|
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
|
|
|
|
virtio_pci_stop_ioeventfd(proxy);
|
|
virtio_blk_exit(proxy->vdev);
|
|
virtio_exit_pci(pci_dev);
|
|
}
|
|
|
|
static int virtio_serial_init_pci(PCIDevice *pci_dev)
|
|
{
|
|
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
|
|
VirtIODevice *vdev;
|
|
|
|
if (proxy->class_code != PCI_CLASS_COMMUNICATION_OTHER &&
|
|
proxy->class_code != PCI_CLASS_DISPLAY_OTHER && /* qemu 0.10 */
|
|
proxy->class_code != PCI_CLASS_OTHERS) /* qemu-kvm */
|
|
proxy->class_code = PCI_CLASS_COMMUNICATION_OTHER;
|
|
|
|
vdev = virtio_serial_init(&pci_dev->qdev, &proxy->serial);
|
|
if (!vdev) {
|
|
return -1;
|
|
}
|
|
vdev->nvectors = proxy->nvectors == DEV_NVECTORS_UNSPECIFIED
|
|
? proxy->serial.max_virtserial_ports + 1
|
|
: proxy->nvectors;
|
|
virtio_init_pci(proxy, vdev);
|
|
proxy->nvectors = vdev->nvectors;
|
|
return 0;
|
|
}
|
|
|
|
static void virtio_serial_exit_pci(PCIDevice *pci_dev)
|
|
{
|
|
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
|
|
|
|
virtio_pci_stop_ioeventfd(proxy);
|
|
virtio_serial_exit(proxy->vdev);
|
|
virtio_exit_pci(pci_dev);
|
|
}
|
|
|
|
static int virtio_net_init_pci(PCIDevice *pci_dev)
|
|
{
|
|
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
|
|
VirtIODevice *vdev;
|
|
|
|
vdev = virtio_net_init(&pci_dev->qdev, &proxy->nic, &proxy->net);
|
|
|
|
vdev->nvectors = proxy->nvectors;
|
|
virtio_init_pci(proxy, vdev);
|
|
|
|
/* make the actual value visible */
|
|
proxy->nvectors = vdev->nvectors;
|
|
return 0;
|
|
}
|
|
|
|
static void virtio_net_exit_pci(PCIDevice *pci_dev)
|
|
{
|
|
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
|
|
|
|
virtio_pci_stop_ioeventfd(proxy);
|
|
virtio_net_exit(proxy->vdev);
|
|
virtio_exit_pci(pci_dev);
|
|
}
|
|
|
|
static int virtio_balloon_init_pci(PCIDevice *pci_dev)
|
|
{
|
|
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
|
|
VirtIODevice *vdev;
|
|
|
|
if (proxy->class_code != PCI_CLASS_OTHERS &&
|
|
proxy->class_code != PCI_CLASS_MEMORY_RAM) { /* qemu < 1.1 */
|
|
proxy->class_code = PCI_CLASS_OTHERS;
|
|
}
|
|
|
|
vdev = virtio_balloon_init(&pci_dev->qdev);
|
|
if (!vdev) {
|
|
return -1;
|
|
}
|
|
virtio_init_pci(proxy, vdev);
|
|
return 0;
|
|
}
|
|
|
|
static void virtio_balloon_exit_pci(PCIDevice *pci_dev)
|
|
{
|
|
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
|
|
|
|
virtio_pci_stop_ioeventfd(proxy);
|
|
virtio_balloon_exit(proxy->vdev);
|
|
virtio_exit_pci(pci_dev);
|
|
}
|
|
|
|
static Property virtio_blk_properties[] = {
|
|
DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0),
|
|
DEFINE_BLOCK_PROPERTIES(VirtIOPCIProxy, blk.conf),
|
|
DEFINE_BLOCK_CHS_PROPERTIES(VirtIOPCIProxy, blk.conf),
|
|
DEFINE_PROP_STRING("serial", VirtIOPCIProxy, blk.serial),
|
|
#ifdef __linux__
|
|
DEFINE_PROP_BIT("scsi", VirtIOPCIProxy, blk.scsi, 0, true),
|
|
#endif
|
|
DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
|
|
DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
|
|
DEFINE_VIRTIO_BLK_FEATURES(VirtIOPCIProxy, host_features),
|
|
DEFINE_PROP_END_OF_LIST(),
|
|
};
|
|
|
|
static void virtio_blk_class_init(ObjectClass *klass, void *data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
|
|
|
|
k->init = virtio_blk_init_pci;
|
|
k->exit = virtio_blk_exit_pci;
|
|
k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
|
|
k->device_id = PCI_DEVICE_ID_VIRTIO_BLOCK;
|
|
k->revision = VIRTIO_PCI_ABI_VERSION;
|
|
k->class_id = PCI_CLASS_STORAGE_SCSI;
|
|
dc->reset = virtio_pci_reset;
|
|
dc->props = virtio_blk_properties;
|
|
}
|
|
|
|
static TypeInfo virtio_blk_info = {
|
|
.name = "virtio-blk-pci",
|
|
.parent = TYPE_PCI_DEVICE,
|
|
.instance_size = sizeof(VirtIOPCIProxy),
|
|
.class_init = virtio_blk_class_init,
|
|
};
|
|
|
|
static Property virtio_net_properties[] = {
|
|
DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, false),
|
|
DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 3),
|
|
DEFINE_VIRTIO_NET_FEATURES(VirtIOPCIProxy, host_features),
|
|
DEFINE_NIC_PROPERTIES(VirtIOPCIProxy, nic),
|
|
DEFINE_PROP_UINT32("x-txtimer", VirtIOPCIProxy, net.txtimer, TX_TIMER_INTERVAL),
|
|
DEFINE_PROP_INT32("x-txburst", VirtIOPCIProxy, net.txburst, TX_BURST),
|
|
DEFINE_PROP_STRING("tx", VirtIOPCIProxy, net.tx),
|
|
DEFINE_PROP_END_OF_LIST(),
|
|
};
|
|
|
|
static void virtio_net_class_init(ObjectClass *klass, void *data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
|
|
|
|
k->init = virtio_net_init_pci;
|
|
k->exit = virtio_net_exit_pci;
|
|
k->romfile = "pxe-virtio.rom";
|
|
k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
|
|
k->device_id = PCI_DEVICE_ID_VIRTIO_NET;
|
|
k->revision = VIRTIO_PCI_ABI_VERSION;
|
|
k->class_id = PCI_CLASS_NETWORK_ETHERNET;
|
|
dc->reset = virtio_pci_reset;
|
|
dc->props = virtio_net_properties;
|
|
}
|
|
|
|
static TypeInfo virtio_net_info = {
|
|
.name = "virtio-net-pci",
|
|
.parent = TYPE_PCI_DEVICE,
|
|
.instance_size = sizeof(VirtIOPCIProxy),
|
|
.class_init = virtio_net_class_init,
|
|
};
|
|
|
|
static Property virtio_serial_properties[] = {
|
|
DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
|
|
DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, DEV_NVECTORS_UNSPECIFIED),
|
|
DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0),
|
|
DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features),
|
|
DEFINE_PROP_UINT32("max_ports", VirtIOPCIProxy, serial.max_virtserial_ports, 31),
|
|
DEFINE_PROP_END_OF_LIST(),
|
|
};
|
|
|
|
static void virtio_serial_class_init(ObjectClass *klass, void *data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
|
|
|
|
k->init = virtio_serial_init_pci;
|
|
k->exit = virtio_serial_exit_pci;
|
|
k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
|
|
k->device_id = PCI_DEVICE_ID_VIRTIO_CONSOLE;
|
|
k->revision = VIRTIO_PCI_ABI_VERSION;
|
|
k->class_id = PCI_CLASS_COMMUNICATION_OTHER;
|
|
dc->reset = virtio_pci_reset;
|
|
dc->props = virtio_serial_properties;
|
|
}
|
|
|
|
static TypeInfo virtio_serial_info = {
|
|
.name = "virtio-serial-pci",
|
|
.parent = TYPE_PCI_DEVICE,
|
|
.instance_size = sizeof(VirtIOPCIProxy),
|
|
.class_init = virtio_serial_class_init,
|
|
};
|
|
|
|
static Property virtio_balloon_properties[] = {
|
|
DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features),
|
|
DEFINE_PROP_HEX32("class", VirtIOPCIProxy, class_code, 0),
|
|
DEFINE_PROP_END_OF_LIST(),
|
|
};
|
|
|
|
static void virtio_balloon_class_init(ObjectClass *klass, void *data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
|
|
|
|
k->init = virtio_balloon_init_pci;
|
|
k->exit = virtio_balloon_exit_pci;
|
|
k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
|
|
k->device_id = PCI_DEVICE_ID_VIRTIO_BALLOON;
|
|
k->revision = VIRTIO_PCI_ABI_VERSION;
|
|
k->class_id = PCI_CLASS_OTHERS;
|
|
dc->reset = virtio_pci_reset;
|
|
dc->props = virtio_balloon_properties;
|
|
}
|
|
|
|
static TypeInfo virtio_balloon_info = {
|
|
.name = "virtio-balloon-pci",
|
|
.parent = TYPE_PCI_DEVICE,
|
|
.instance_size = sizeof(VirtIOPCIProxy),
|
|
.class_init = virtio_balloon_class_init,
|
|
};
|
|
|
|
static int virtio_scsi_init_pci(PCIDevice *pci_dev)
|
|
{
|
|
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
|
|
VirtIODevice *vdev;
|
|
|
|
vdev = virtio_scsi_init(&pci_dev->qdev, &proxy->scsi);
|
|
if (!vdev) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
vdev->nvectors = proxy->nvectors == DEV_NVECTORS_UNSPECIFIED
|
|
? proxy->scsi.num_queues + 3
|
|
: proxy->nvectors;
|
|
virtio_init_pci(proxy, vdev);
|
|
|
|
/* make the actual value visible */
|
|
proxy->nvectors = vdev->nvectors;
|
|
return 0;
|
|
}
|
|
|
|
static void virtio_scsi_exit_pci(PCIDevice *pci_dev)
|
|
{
|
|
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
|
|
|
|
virtio_scsi_exit(proxy->vdev);
|
|
virtio_exit_pci(pci_dev);
|
|
}
|
|
|
|
static Property virtio_scsi_properties[] = {
|
|
DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags, VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
|
|
DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, DEV_NVECTORS_UNSPECIFIED),
|
|
DEFINE_VIRTIO_SCSI_PROPERTIES(VirtIOPCIProxy, host_features, scsi),
|
|
DEFINE_PROP_END_OF_LIST(),
|
|
};
|
|
|
|
static void virtio_scsi_class_init(ObjectClass *klass, void *data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
|
|
|
|
k->init = virtio_scsi_init_pci;
|
|
k->exit = virtio_scsi_exit_pci;
|
|
k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
|
|
k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI;
|
|
k->revision = 0x00;
|
|
k->class_id = PCI_CLASS_STORAGE_SCSI;
|
|
dc->reset = virtio_pci_reset;
|
|
dc->props = virtio_scsi_properties;
|
|
}
|
|
|
|
static TypeInfo virtio_scsi_info = {
|
|
.name = "virtio-scsi-pci",
|
|
.parent = TYPE_PCI_DEVICE,
|
|
.instance_size = sizeof(VirtIOPCIProxy),
|
|
.class_init = virtio_scsi_class_init,
|
|
};
|
|
|
|
static void virtio_pci_register_types(void)
|
|
{
|
|
type_register_static(&virtio_blk_info);
|
|
type_register_static(&virtio_net_info);
|
|
type_register_static(&virtio_serial_info);
|
|
type_register_static(&virtio_balloon_info);
|
|
type_register_static(&virtio_scsi_info);
|
|
}
|
|
|
|
type_init(virtio_pci_register_types)
|