diff options
Diffstat (limited to 'hw/virtio')
| -rw-r--r-- | hw/virtio/dataplane/vring.c | 10 | ||||
| -rw-r--r-- | hw/virtio/virtio-balloon.c | 2 | ||||
| -rw-r--r-- | hw/virtio/virtio-bus.c | 14 | ||||
| -rw-r--r-- | hw/virtio/virtio-mmio.c | 2 | ||||
| -rw-r--r-- | hw/virtio/virtio-pci.c | 63 | ||||
| -rw-r--r-- | hw/virtio/virtio.c | 33 |
6 files changed, 26 insertions, 98 deletions
diff --git a/hw/virtio/dataplane/vring.c b/hw/virtio/dataplane/vring.c index 0936f659e5..5c7b8c20fa 100644 --- a/hw/virtio/dataplane/vring.c +++ b/hw/virtio/dataplane/vring.c @@ -105,7 +105,7 @@ void vring_teardown(Vring *vring, VirtIODevice *vdev, int n) /* Disable guest->host notifies */ void vring_disable_notification(VirtIODevice *vdev, Vring *vring) { - if (!(vdev->guest_features & (1 << VIRTIO_RING_F_EVENT_IDX))) { + if (!virtio_has_feature(vdev, VIRTIO_RING_F_EVENT_IDX)) { vring_set_used_flags(vdev, vring, VRING_USED_F_NO_NOTIFY); } } @@ -116,7 +116,7 @@ void vring_disable_notification(VirtIODevice *vdev, Vring *vring) */ bool vring_enable_notification(VirtIODevice *vdev, Vring *vring) { - if (vdev->guest_features & (1 << VIRTIO_RING_F_EVENT_IDX)) { + if (virtio_has_feature(vdev, VIRTIO_RING_F_EVENT_IDX)) { vring_avail_event(&vring->vr) = vring->vr.avail->idx; } else { vring_clear_used_flags(vdev, vring, VRING_USED_F_NO_NOTIFY); @@ -135,12 +135,12 @@ bool vring_should_notify(VirtIODevice *vdev, Vring *vring) * interrupts. */ smp_mb(); - if ((vdev->guest_features & (1 << VIRTIO_F_NOTIFY_ON_EMPTY)) && + if (virtio_has_feature(vdev, VIRTIO_F_NOTIFY_ON_EMPTY) && unlikely(!vring_more_avail(vdev, vring))) { return true; } - if (!(vdev->guest_features & (1 << VIRTIO_RING_F_EVENT_IDX))) { + if (!virtio_has_feature(vdev, VIRTIO_RING_F_EVENT_IDX)) { return !(vring_get_avail_flags(vdev, vring) & VRING_AVAIL_F_NO_INTERRUPT); } @@ -401,7 +401,7 @@ int vring_pop(VirtIODevice *vdev, Vring *vring, /* On success, increment avail index. */ vring->last_avail_idx++; - if (vdev->guest_features & (1 << VIRTIO_RING_F_EVENT_IDX)) { + if (virtio_has_feature(vdev, VIRTIO_RING_F_EVENT_IDX)) { vring_avail_event(&vring->vr) = vring->last_avail_idx; } diff --git a/hw/virtio/virtio-balloon.c b/hw/virtio/virtio-balloon.c index 8a48d2a178..95b0643448 100644 --- a/hw/virtio/virtio-balloon.c +++ b/hw/virtio/virtio-balloon.c @@ -70,7 +70,7 @@ static inline void reset_stats(VirtIOBalloon *dev) static bool balloon_stats_supported(const VirtIOBalloon *s) { VirtIODevice *vdev = VIRTIO_DEVICE(s); - return vdev->guest_features & (1 << VIRTIO_BALLOON_F_STATS_VQ); + return virtio_has_feature(vdev, VIRTIO_BALLOON_F_STATS_VQ); } static bool balloon_stats_enabled(const VirtIOBalloon *s) diff --git a/hw/virtio/virtio-bus.c b/hw/virtio/virtio-bus.c index dfd2d8c772..be886e75af 100644 --- a/hw/virtio/virtio-bus.c +++ b/hw/virtio/virtio-bus.c @@ -109,20 +109,6 @@ uint32_t virtio_bus_get_vdev_features(VirtioBusState *bus, return k->get_features(vdev, requested_features); } -/* Set the features of the plugged device. */ -void virtio_bus_set_vdev_features(VirtioBusState *bus, - uint32_t requested_features) -{ - VirtIODevice *vdev = virtio_bus_get_device(bus); - VirtioDeviceClass *k; - - assert(vdev != NULL); - k = VIRTIO_DEVICE_GET_CLASS(vdev); - if (k->set_features != NULL) { - k->set_features(vdev, requested_features); - } -} - /* Get bad features of the plugged device. */ uint32_t virtio_bus_get_vdev_bad_features(VirtioBusState *bus) { diff --git a/hw/virtio/virtio-mmio.c b/hw/virtio/virtio-mmio.c index 2450c13747..10123f34b2 100644 --- a/hw/virtio/virtio-mmio.c +++ b/hw/virtio/virtio-mmio.c @@ -349,7 +349,7 @@ static void virtio_mmio_device_plugged(DeviceState *opaque) { VirtIOMMIOProxy *proxy = VIRTIO_MMIO(opaque); - proxy->host_features |= (0x1 << VIRTIO_F_NOTIFY_ON_EMPTY); + virtio_add_feature(&proxy->host_features, VIRTIO_F_NOTIFY_ON_EMPTY); proxy->host_features = virtio_bus_get_vdev_features(&proxy->bus, proxy->host_features); } diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c index 604cb5b749..e7baf7b5e8 100644 --- a/hw/virtio/virtio-pci.c +++ b/hw/virtio/virtio-pci.c @@ -17,6 +17,7 @@ #include <inttypes.h> +#include "standard-headers/linux/virtio_pci.h" #include "hw/virtio/virtio.h" #include "hw/virtio/virtio-blk.h" #include "hw/virtio/virtio-net.h" @@ -35,56 +36,11 @@ #include "hw/virtio/virtio-bus.h" #include "qapi/visitor.h" -/* from Linux's linux/virtio_pci.h */ - -/* A 32-bit r/o bitmask of the features supported by the host */ -#define VIRTIO_PCI_HOST_FEATURES 0 - -/* A 32-bit r/w bitmask of features activated by the guest */ -#define VIRTIO_PCI_GUEST_FEATURES 4 - -/* A 32-bit r/w PFN for the currently selected queue */ -#define VIRTIO_PCI_QUEUE_PFN 8 - -/* A 16-bit r/o queue size for the currently selected queue */ -#define VIRTIO_PCI_QUEUE_NUM 12 - -/* A 16-bit r/w queue selector */ -#define VIRTIO_PCI_QUEUE_SEL 14 - -/* A 16-bit r/w queue notifier */ -#define VIRTIO_PCI_QUEUE_NOTIFY 16 - -/* An 8-bit device status register. */ -#define VIRTIO_PCI_STATUS 18 - -/* An 8-bit r/o interrupt status register. Reading the value will return the - * current contents of the ISR and will also clear it. This is effectively - * a read-and-acknowledge. */ -#define VIRTIO_PCI_ISR 19 - -/* MSI-X registers: only enabled if MSI-X is enabled. */ -/* A 16-bit vector for configuration changes. */ -#define VIRTIO_MSI_CONFIG_VECTOR 20 -/* A 16-bit vector for selected queue notifications. */ -#define VIRTIO_MSI_QUEUE_VECTOR 22 - -/* Config space size */ -#define VIRTIO_PCI_CONFIG_NOMSI 20 -#define VIRTIO_PCI_CONFIG_MSI 24 -#define VIRTIO_PCI_REGION_SIZE(dev) (msix_present(dev) ? \ - VIRTIO_PCI_CONFIG_MSI : \ - VIRTIO_PCI_CONFIG_NOMSI) +#define VIRTIO_PCI_REGION_SIZE(dev) VIRTIO_PCI_CONFIG_OFF(msix_present(dev)) /* The remaining space is defined by each driver as the per-driver * configuration space */ -#define VIRTIO_PCI_CONFIG(dev) (msix_enabled(dev) ? \ - VIRTIO_PCI_CONFIG_MSI : \ - VIRTIO_PCI_CONFIG_NOMSI) - -/* How many bits to shift physical queue address written to QUEUE_PFN. - * 12 is historical, and due to x86 page size. */ -#define VIRTIO_PCI_QUEUE_ADDR_SHIFT 12 +#define VIRTIO_PCI_CONFIG_SIZE(dev) VIRTIO_PCI_CONFIG_OFF(msix_enabled(dev)) static void virtio_pci_bus_new(VirtioBusState *bus, size_t bus_size, VirtIOPCIProxy *dev); @@ -392,7 +348,7 @@ static uint64_t virtio_pci_config_read(void *opaque, hwaddr addr, { VirtIOPCIProxy *proxy = opaque; VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); - uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev); + uint32_t config = VIRTIO_PCI_CONFIG_SIZE(&proxy->pci_dev); uint64_t val = 0; if (addr < config) { return virtio_ioport_read(proxy, addr); @@ -423,7 +379,7 @@ static void virtio_pci_config_write(void *opaque, hwaddr addr, uint64_t val, unsigned size) { VirtIOPCIProxy *proxy = opaque; - uint32_t config = VIRTIO_PCI_CONFIG(&proxy->pci_dev); + uint32_t config = VIRTIO_PCI_CONFIG_SIZE(&proxy->pci_dev); VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus); if (addr < config) { virtio_ioport_write(proxy, addr, val); @@ -996,8 +952,8 @@ static void virtio_pci_device_plugged(DeviceState *d) proxy->flags &= ~VIRTIO_PCI_FLAG_USE_IOEVENTFD; } - proxy->host_features |= 0x1 << VIRTIO_F_NOTIFY_ON_EMPTY; - proxy->host_features |= 0x1 << VIRTIO_F_BAD_FEATURE; + virtio_add_feature(&proxy->host_features, VIRTIO_F_NOTIFY_ON_EMPTY); + virtio_add_feature(&proxy->host_features, VIRTIO_F_BAD_FEATURE); proxy->host_features = virtio_bus_get_vdev_features(bus, proxy->host_features); } @@ -1318,9 +1274,8 @@ static void virtio_balloon_pci_class_init(ObjectClass *klass, void *data) static void virtio_balloon_pci_instance_init(Object *obj) { VirtIOBalloonPCI *dev = VIRTIO_BALLOON_PCI(obj); - object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_BALLOON); - object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); - object_unref(OBJECT(&dev->vdev)); + virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev), + TYPE_VIRTIO_BALLOON); object_property_add(obj, "guest-stats", "guest statistics", balloon_pci_stats_get_all, NULL, NULL, dev, NULL); diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c index d735343ca8..3c6e430048 100644 --- a/hw/virtio/virtio.c +++ b/hw/virtio/virtio.c @@ -155,7 +155,7 @@ static inline uint16_t vring_avail_ring(VirtQueue *vq, int i) return virtio_lduw_phys(vq->vdev, pa); } -static inline uint16_t vring_used_event(VirtQueue *vq) +static inline uint16_t vring_get_used_event(VirtQueue *vq) { return vring_avail_ring(vq, vq->vring.num); } @@ -204,7 +204,7 @@ static inline void vring_used_flags_unset_bit(VirtQueue *vq, int mask) virtio_stw_phys(vdev, pa, virtio_lduw_phys(vdev, pa) & ~mask); } -static inline void vring_avail_event(VirtQueue *vq, uint16_t val) +static inline void vring_set_avail_event(VirtQueue *vq, uint16_t val) { hwaddr pa; if (!vq->notification) { @@ -217,8 +217,8 @@ static inline void vring_avail_event(VirtQueue *vq, uint16_t val) void virtio_queue_set_notification(VirtQueue *vq, int enable) { vq->notification = enable; - if (vq->vdev->guest_features & (1 << VIRTIO_RING_F_EVENT_IDX)) { - vring_avail_event(vq, vring_avail_idx(vq)); + if (virtio_has_feature(vq->vdev, VIRTIO_RING_F_EVENT_IDX)) { + vring_set_avail_event(vq, vring_avail_idx(vq)); } else if (enable) { vring_used_flags_unset_bit(vq, VRING_USED_F_NO_NOTIFY); } else { @@ -468,8 +468,8 @@ int virtqueue_pop(VirtQueue *vq, VirtQueueElement *elem) max = vq->vring.num; i = head = virtqueue_get_head(vq, vq->last_avail_idx++); - if (vdev->guest_features & (1 << VIRTIO_RING_F_EVENT_IDX)) { - vring_avail_event(vq, vq->last_avail_idx); + if (virtio_has_feature(vdev, VIRTIO_RING_F_EVENT_IDX)) { + vring_set_avail_event(vq, vq->last_avail_idx); } if (vring_desc_flags(vdev, desc_pa, i) & VRING_DESC_F_INDIRECT) { @@ -819,19 +819,6 @@ void virtio_irq(VirtQueue *vq) virtio_notify_vector(vq->vdev, vq->vector); } -/* Assuming a given event_idx value from the other size, if - * we have just incremented index from old to new_idx, - * should we trigger an event? */ -static inline int vring_need_event(uint16_t event, uint16_t new, uint16_t old) -{ - /* Note: Xen has similar logic for notification hold-off - * in include/xen/interface/io/ring.h with req_event and req_prod - * corresponding to event_idx + 1 and new respectively. - * Note also that req_event and req_prod in Xen start at 1, - * event indexes in virtio start at 0. */ - return (uint16_t)(new - event - 1) < (uint16_t)(new - old); -} - static bool vring_notify(VirtIODevice *vdev, VirtQueue *vq) { uint16_t old, new; @@ -839,12 +826,12 @@ static bool vring_notify(VirtIODevice *vdev, VirtQueue *vq) /* We need to expose used array entries before checking used event. */ smp_mb(); /* Always notify when queue is empty (when feature acknowledge) */ - if (((vdev->guest_features & (1 << VIRTIO_F_NOTIFY_ON_EMPTY)) && - !vq->inuse && vring_avail_idx(vq) == vq->last_avail_idx)) { + if (virtio_has_feature(vdev, VIRTIO_F_NOTIFY_ON_EMPTY) && + !vq->inuse && vring_avail_idx(vq) == vq->last_avail_idx) { return true; } - if (!(vdev->guest_features & (1 << VIRTIO_RING_F_EVENT_IDX))) { + if (!virtio_has_feature(vdev, VIRTIO_RING_F_EVENT_IDX)) { return !(vring_avail_flags(vq) & VRING_AVAIL_F_NO_INTERRUPT); } @@ -852,7 +839,7 @@ static bool vring_notify(VirtIODevice *vdev, VirtQueue *vq) vq->signalled_used_valid = true; old = vq->signalled_used; new = vq->signalled_used = vring_used_idx(vq); - return !v || vring_need_event(vring_used_event(vq), new, old); + return !v || vring_need_event(vring_get_used_event(vq), new, old); } void virtio_notify(VirtIODevice *vdev, VirtQueue *vq) |