Make features 64bit wide everywhere.
On migration a full 64bit guest_features field is sent if one of the
high bits is set, in addition to the lower 32bit guest_features field
which must stay for compatibility reasons. That way we send the lower
32 feature bits twice, but the code is simpler because we don't have
to split and compose the 64bit features into two 32bit fields.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
#include "virtio-9p-coth.h"
#include "hw/virtio/virtio-access.h"
-static uint32_t virtio_9p_get_features(VirtIODevice *vdev, uint32_t features)
+static uint64_t virtio_9p_get_features(VirtIODevice *vdev, uint64_t features)
{
virtio_add_feature(&features, VIRTIO_9P_MOUNT_TAG);
return features;
aio_context_release(blk_get_aio_context(s->blk));
}
-static uint32_t virtio_blk_get_features(VirtIODevice *vdev, uint32_t features)
+static uint64_t virtio_blk_get_features(VirtIODevice *vdev, uint64_t features)
{
VirtIOBlock *s = VIRTIO_BLK(vdev);
}
}
-static uint32_t get_features(VirtIODevice *vdev, uint32_t features)
+static uint64_t get_features(VirtIODevice *vdev, uint64_t features)
{
VirtIOSerial *vser;
virtio_notify_config(vdev);
}
-static uint32_t virtio_input_get_features(VirtIODevice *vdev, uint32_t f)
+static uint64_t virtio_input_get_features(VirtIODevice *vdev, uint64_t f)
{
return f;
}
static void virtio_net_set_multiqueue(VirtIONet *n, int multiqueue);
-static uint32_t virtio_net_get_features(VirtIODevice *vdev, uint32_t features)
+static uint64_t virtio_net_get_features(VirtIODevice *vdev, uint64_t features)
{
VirtIONet *n = VIRTIO_NET(vdev);
NetClientState *nc = qemu_get_queue(n->nic);
return vhost_net_get_features(get_vhost_net(nc->peer), features);
}
-static uint32_t virtio_net_bad_features(VirtIODevice *vdev)
+static uint64_t virtio_net_bad_features(VirtIODevice *vdev)
{
- uint32_t features = 0;
+ uint64_t features = 0;
/* Linux kernel 2.6.25. It understood MAC (as everyone must),
* but also these: */
if (i == 0)
return -1;
error_report("virtio-net unexpected empty queue: "
- "i %zd mergeable %d offset %zd, size %zd, "
- "guest hdr len %zd, host hdr len %zd guest features 0x%x",
- i, n->mergeable_rx_bufs, offset, size,
- n->guest_hdr_len, n->host_hdr_len, vdev->guest_features);
+ "i %zd mergeable %d offset %zd, size %zd, "
+ "guest hdr len %zd, host hdr len %zd "
+ "guest features 0x%" PRIx64,
+ i, n->mergeable_rx_bufs, offset, size,
+ n->guest_hdr_len, n->host_hdr_len,
+ vdev->guest_features);
exit(1);
}
vdev, idx, mask);
}
-static void virtio_net_set_config_size(VirtIONet *n, uint32_t host_features)
+static void virtio_net_set_config_size(VirtIONet *n, uint64_t host_features)
{
int i, config_size = 0;
virtio_add_feature(&host_features, VIRTIO_NET_F_MAC);
vhost_dev_disable_notifiers(&s->dev, vdev);
}
-static uint32_t vhost_scsi_get_features(VirtIODevice *vdev,
- uint32_t features)
+static uint64_t vhost_scsi_get_features(VirtIODevice *vdev,
+ uint64_t features)
{
VHostSCSI *s = VHOST_SCSI(vdev);
vs->cdb_size = virtio_ldl_p(vdev, &scsiconf->cdb_size);
}
-static uint32_t virtio_scsi_get_features(VirtIODevice *vdev,
- uint32_t requested_features)
+static uint64_t virtio_scsi_get_features(VirtIODevice *vdev,
+ uint64_t requested_features)
{
VirtIOSCSI *s = VIRTIO_SCSI(vdev);
trace_virtio_balloon_set_config(dev->actual, oldactual);
}
-static uint32_t virtio_balloon_get_features(VirtIODevice *vdev, uint32_t f)
+static uint64_t virtio_balloon_get_features(VirtIODevice *vdev, uint64_t f)
{
f |= (1 << VIRTIO_BALLOON_F_STATS_VQ);
return f;
virtio_rng_process(vrng);
}
-static uint32_t get_features(VirtIODevice *vdev, uint32_t f)
+static uint64_t get_features(VirtIODevice *vdev, uint64_t f)
{
return f;
}
return vdev->device_endian != virtio_default_endian();
}
+static bool virtio_64bit_features_needed(void *opaque)
+{
+ VirtIODevice *vdev = opaque;
+
+ return (vdev->host_features >> 32) != 0;
+}
+
static const VMStateDescription vmstate_virtio_device_endian = {
.name = "virtio/device_endian",
.version_id = 1,
}
};
+static const VMStateDescription vmstate_virtio_64bit_features = {
+ .name = "virtio/64bit_features",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT64(guest_features, VirtIODevice),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
static const VMStateDescription vmstate_virtio = {
.name = "virtio",
.version_id = 1,
.vmsd = &vmstate_virtio_device_endian,
.needed = &virtio_device_endian_needed
},
+ {
+ .vmsd = &vmstate_virtio_64bit_features,
+ .needed = &virtio_64bit_features_needed
+ },
{ 0 }
}
};
BusState *qbus = qdev_get_parent_bus(DEVICE(vdev));
VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(vdev);
+ uint32_t guest_features_lo = (vdev->guest_features & 0xffffffff);
int i;
if (k->save_config) {
qemu_put_8s(f, &vdev->status);
qemu_put_8s(f, &vdev->isr);
qemu_put_be16s(f, &vdev->queue_sel);
- qemu_put_be32s(f, &vdev->guest_features);
+ qemu_put_be32s(f, &guest_features_lo);
qemu_put_be32(f, vdev->config_len);
qemu_put_buffer(f, vdev->config, vdev->config_len);
}
qemu_get_be32s(f, &features);
- if (virtio_set_features(vdev, features) < 0) {
- error_report("Features 0x%x unsupported. Allowed features: 0x%x",
- features, vdev->host_features);
- return -1;
- }
config_len = qemu_get_be32(f);
/*
vdev->device_endian = virtio_default_endian();
}
+ if (virtio_64bit_features_needed(vdev)) {
+ /*
+ * Subsection load filled vdev->guest_features. Run them
+ * through virtio_set_features to sanity-check them against
+ * host_features.
+ */
+ uint64_t features64 = vdev->guest_features;
+ if (virtio_set_features(vdev, features64) < 0) {
+ error_report("Features 0x%" PRIx64 " unsupported. "
+ "Allowed features: 0x%" PRIx64,
+ features64, vdev->host_features);
+ return -1;
+ }
+ } else {
+ if (virtio_set_features(vdev, features) < 0) {
+ error_report("Features 0x%x unsupported. "
+ "Allowed features: 0x%" PRIx64,
+ features, vdev->host_features);
+ return -1;
+ }
+ }
+
for (i = 0; i < num; i++) {
if (vdev->vq[i].pa) {
uint16_t nheads;
uint8_t status;
uint8_t isr;
uint16_t queue_sel;
- uint32_t guest_features;
- uint32_t host_features;
+ uint64_t guest_features;
+ uint64_t host_features;
size_t config_len;
void *config;
uint16_t config_vector;
/* This is what a VirtioDevice must implement */
DeviceRealize realize;
DeviceUnrealize unrealize;
- uint32_t (*get_features)(VirtIODevice *vdev, uint32_t requested_features);
- uint32_t (*bad_features)(VirtIODevice *vdev);
+ uint64_t (*get_features)(VirtIODevice *vdev, uint64_t requested_features);
+ uint64_t (*bad_features)(VirtIODevice *vdev);
void (*set_features)(VirtIODevice *vdev, uint32_t val);
void (*get_config)(VirtIODevice *vdev, uint8_t *config);
void (*set_config)(VirtIODevice *vdev, const uint8_t *config);
typedef struct VirtIORNGConf VirtIORNGConf;
#define DEFINE_VIRTIO_COMMON_FEATURES(_state, _field) \
- DEFINE_PROP_BIT("indirect_desc", _state, _field, \
- VIRTIO_RING_F_INDIRECT_DESC, true), \
- DEFINE_PROP_BIT("event_idx", _state, _field, \
- VIRTIO_RING_F_EVENT_IDX, true), \
- DEFINE_PROP_BIT("notify_on_empty", _state, _field, \
- VIRTIO_F_NOTIFY_ON_EMPTY, true)
+ DEFINE_PROP_BIT64("indirect_desc", _state, _field, \
+ VIRTIO_RING_F_INDIRECT_DESC, true), \
+ DEFINE_PROP_BIT64("event_idx", _state, _field, \
+ VIRTIO_RING_F_EVENT_IDX, true), \
+ DEFINE_PROP_BIT64("notify_on_empty", _state, _field, \
+ VIRTIO_F_NOTIFY_ON_EMPTY, true)
hwaddr virtio_queue_get_desc_addr(VirtIODevice *vdev, int n);
hwaddr virtio_queue_get_avail_addr(VirtIODevice *vdev, int n);
VirtQueue *virtio_vector_first_queue(VirtIODevice *vdev, uint16_t vector);
VirtQueue *virtio_vector_next_queue(VirtQueue *vq);
-static inline void virtio_add_feature(uint32_t *features, unsigned int fbit)
+static inline void virtio_add_feature(uint64_t *features, unsigned int fbit)
{
- assert(fbit < 32);
+ assert(fbit < 64);
*features |= (1 << fbit);
}
-static inline void virtio_clear_feature(uint32_t *features, unsigned int fbit)
+static inline void virtio_clear_feature(uint64_t *features, unsigned int fbit)
{
- assert(fbit < 32);
+ assert(fbit < 64);
*features &= ~(1 << fbit);
}
-static inline bool __virtio_has_feature(uint32_t features, unsigned int fbit)
+static inline bool __virtio_has_feature(uint64_t features, unsigned int fbit)
{
- assert(fbit < 32);
+ assert(fbit < 64);
return !!(features & (1 << fbit));
}