@@ -23,6 +23,7 @@ typedef struct QVirtioDevice {
uint16_t device_type;
uint64_t features;
bool big_endian;
+ bool features_negotiated;
} QVirtioDevice;
typedef struct QVirtQueue {
@@ -15,21 +15,25 @@
uint8_t qvirtio_config_readb(QVirtioDevice *d, uint64_t addr)
{
+ g_assert_true(d->features_negotiated);
return d->bus->config_readb(d, addr);
}
uint16_t qvirtio_config_readw(QVirtioDevice *d, uint64_t addr)
{
+ g_assert_true(d->features_negotiated);
return d->bus->config_readw(d, addr);
}
uint32_t qvirtio_config_readl(QVirtioDevice *d, uint64_t addr)
{
+ g_assert_true(d->features_negotiated);
return d->bus->config_readl(d, addr);
}
uint64_t qvirtio_config_readq(QVirtioDevice *d, uint64_t addr)
{
+ g_assert_true(d->features_negotiated);
return d->bus->config_readq(d, addr);
}
@@ -42,11 +46,13 @@ void qvirtio_set_features(QVirtioDevice *d, uint64_t features)
{
d->features = features;
d->bus->set_features(d, features);
+ d->features_negotiated = true;
}
QVirtQueue *qvirtqueue_setup(QVirtioDevice *d,
QGuestAllocator *alloc, uint16_t index)
{
+ g_assert_true(d->features_negotiated);
return d->bus->virtqueue_setup(d, alloc, index);
}
@@ -60,6 +66,7 @@ void qvirtio_reset(QVirtioDevice *d)
{
d->bus->set_status(d, 0);
g_assert_cmphex(d->bus->get_status(d), ==, 0);
+ d->features_negotiated = false;
}
void qvirtio_set_acknowledge(QVirtioDevice *d)
According to VIRTIO 1.1 "3.1.1 Driver Requirements: Device Initialization", configuration space and virtqueues cannot be accessed before features have been negotiated. Enforce this requirement. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> --- v4: * Introduce bool d->features_negotiated so that tests can negotiate a 0 feature bit set in Legacy mode [Thomas] --- tests/libqos/virtio.h | 1 + tests/libqos/virtio.c | 7 +++++++ 2 files changed, 8 insertions(+)