Change the u32 to a u64, and make sure to use 1ULL everywhere!
---
drivers/char/virtio_console.c | 2 +-
drivers/lguest/lguest_device.c | 10 +++++-----
drivers/s390/kvm/kvm_virtio.c | 10 +++++-----
drivers/virtio/virtio.c | 12 ++++++------
drivers/virtio/virtio_mmio.c | 14 +++++++++-----
drivers/virtio/virtio_pci.c | 5 ++---
drivers/virtio/virtio_ring.c | 2 +-
include/linux/virtio.h | 2 +-
include/linux/virtio_config.h | 8 ++++----
tools/virtio/linux/virtio.h | 4 ++--
10 files changed, 36 insertions(+), 33 deletions(-)
diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c
--- a/drivers/char/virtio_console.c
+++ b/drivers/char/virtio_console.c
@@ -331,7 +331,7 @@ static inline bool use_multiport(struct
*/
if (!portdev->vdev)
return 0;
- return portdev->vdev->features & (1 << VIRTIO_CONSOLE_F_MULTIPORT);
+ return portdev->vdev->features & (1ULL << VIRTIO_CONSOLE_F_MULTIPORT);
}
static void free_buf(struct port_buffer *buf)
diff --git a/drivers/lguest/lguest_device.c b/drivers/lguest/lguest_device.c
--- a/drivers/lguest/lguest_device.c
+++ b/drivers/lguest/lguest_device.c
@@ -94,17 +94,17 @@ static unsigned desc_size(const struct l
}
/* This gets the device's feature bits. */
-static u32 lg_get_features(struct virtio_device *vdev)
+static u64 lg_get_features(struct virtio_device *vdev)
{
unsigned int i;
- u32 features = 0;
+ u64 features = 0;
struct lguest_device_desc *desc = to_lgdev(vdev)->desc;
u8 *in_features = lg_features(desc);
/* We do this the slow but generic way. */
- for (i = 0; i < min(desc->feature_len * 8, 32); i++)
+ for (i = 0; i < min(desc->feature_len * 8, 64); i++)
if (in_features[i / 8] & (1 << (i % 8)))
- features |= (1 << i);
+ features |= (1ULL << i);
return features;
}
@@ -144,7 +144,7 @@ static void lg_finalize_features(struct
memset(out_features, 0, desc->feature_len);
bits = min_t(unsigned, desc->feature_len, sizeof(vdev->features)) * 8;
for (i = 0; i < bits; i++) {
- if (vdev->features & (1 << i))
+ if (vdev->features & (1ULL << i))
out_features[i / 8] |= (1 << (i % 8));
}
diff --git a/drivers/s390/kvm/kvm_virtio.c b/drivers/s390/kvm/kvm_virtio.c
--- a/drivers/s390/kvm/kvm_virtio.c
+++ b/drivers/s390/kvm/kvm_virtio.c
@@ -79,16 +79,16 @@ static unsigned desc_size(const struct k
}
/* This gets the device's feature bits. */
-static u32 kvm_get_features(struct virtio_device *vdev)
+static u64 kvm_get_features(struct virtio_device *vdev)
{
unsigned int i;
- u32 features = 0;
+ u64 features = 0;
struct kvm_device_desc *desc = to_kvmdev(vdev)->desc;
u8 *in_features = kvm_vq_features(desc);
- for (i = 0; i < min(desc->feature_len * 8, 32); i++)
+ for (i = 0; i < min(desc->feature_len * 8, 64); i++)
if (in_features[i / 8] & (1 << (i % 8)))
- features |= (1 << i);
+ features |= (1ULL << i);
return features;
}
@@ -105,7 +105,7 @@ static void kvm_finalize_features(struct
memset(out_features, 0, desc->feature_len);
bits = min_t(unsigned, desc->feature_len, sizeof(vdev->features)) * 8;
for (i = 0; i < bits; i++) {
- if (vdev->features & (1 << i))
+ if (vdev->features & (1ULL << i))
out_features[i / 8] |= (1 << (i % 8));
}
}
diff --git a/drivers/virtio/virtio.c b/drivers/virtio/virtio.c
--- a/drivers/virtio/virtio.c
+++ b/drivers/virtio/virtio.c
@@ -113,7 +113,7 @@ static int virtio_dev_probe(struct devic
struct virtio_device *dev = container_of(_d,struct virtio_device,dev);
struct virtio_driver *drv = container_of(dev->dev.driver,
struct virtio_driver, driver);
- u32 device_features;
+ u64 device_features;
/* We have a driver! */
add_status(dev, VIRTIO_CONFIG_S_DRIVER);
@@ -125,15 +125,15 @@ static int virtio_dev_probe(struct devic
dev->features = 0;
for (i = 0; i < drv->feature_table_size; i++) {
unsigned int f = drv->feature_table[i];
- BUG_ON(f >= 32);
- if (device_features & (1 << f))
- dev->features |= (1 << f);
+ BUG_ON(f >= 64);
+ if (device_features & (1ULL << f))
+ dev->features |= (1ULL << f);
}
/* Transport features always preserved to pass to finalize_features. */
for (i = VIRTIO_TRANSPORT_F_START; i < VIRTIO_TRANSPORT_F_END; i++)
- if (device_features & (1 << i))
- dev->features |= (1 << i);
+ if (device_features & (1ULL << i))
+ dev->features |= (1ULL << i);
dev->config->finalize_features(dev);
diff --git a/drivers/virtio/virtio_mmio.c b/drivers/virtio/virtio_mmio.c
--- a/drivers/virtio/virtio_mmio.c
+++ b/drivers/virtio/virtio_mmio.c
@@ -99,14 +99,16 @@ struct virtio_mmio_vq_info {
/* Configuration interface */
-static u32 vm_get_features(struct virtio_device *vdev)
+static u64 vm_get_features(struct virtio_device *vdev)
{
struct virtio_mmio_device *vm_dev = to_virtio_mmio_device(vdev);
+ u64 features;
- /* TODO: Features > 32 bits */
writel(0, vm_dev->base + VIRTIO_MMIO_HOST_FEATURES_SEL);
-
- return readl(vm_dev->base + VIRTIO_MMIO_HOST_FEATURES);
+ features = readl(vm_dev->base + VIRTIO_MMIO_HOST_FEATURES);
+ writel(1, vm_dev->base + VIRTIO_MMIO_HOST_FEATURES_SEL);
+ features |= ((u64)readl(vm_dev->base + VIRTIO_MMIO_HOST_FEATURES) <<
32);
+ return features;
}
static void vm_finalize_features(struct virtio_device *vdev)
@@ -117,7 +119,9 @@ static void vm_finalize_features(struct
vring_transport_features(vdev);
writel(0, vm_dev->base + VIRTIO_MMIO_GUEST_FEATURES_SEL);
- writel(vdev->features, vm_dev->base + VIRTIO_MMIO_GUEST_FEATURES);
+ writel((u32)vdev->features, vm_dev->base + VIRTIO_MMIO_GUEST_FEATURES);
+ writel(1, vm_dev->base + VIRTIO_MMIO_GUEST_FEATURES_SEL);
+ writel(vdev->features >> 32, vm_dev->base + VIRTIO_MMIO_GUEST_FEATURES);
}
static void vm_get(struct virtio_device *vdev, unsigned offset,
diff --git a/drivers/virtio/virtio_pci.c b/drivers/virtio/virtio_pci.c
--- a/drivers/virtio/virtio_pci.c
+++ b/drivers/virtio/virtio_pci.c
@@ -103,12 +103,11 @@ static struct virtio_pci_device *to_vp_d
}
/* virtio config->get_features() implementation */
-static u32 vp_get_features(struct virtio_device *vdev)
+static u64 vp_get_features(struct virtio_device *vdev)
{
struct virtio_pci_device *vp_dev = to_vp_device(vdev);
- /* When someone needs more than 32 feature bits, we'll need to
- * steal a bit to indicate that the rest are somewhere else. */
+ /* We only support 32 feature bits. */
return ioread32(vp_dev->ioaddr + VIRTIO_PCI_HOST_FEATURES);
}
diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
--- a/drivers/virtio/virtio_ring.c
+++ b/drivers/virtio/virtio_ring.c
@@ -685,7 +685,7 @@ void vring_transport_features(struct vir
break;
default:
/* We don't understand this bit. */
- vdev->features &= ~(1 << i);
+ vdev->features &= ~(1ULL << i);
}
}
}
diff --git a/include/linux/virtio.h b/include/linux/virtio.h
--- a/include/linux/virtio.h
+++ b/include/linux/virtio.h
@@ -66,7 +66,7 @@ struct virtio_device {
struct virtio_device_id id;
struct virtio_config_ops *config;
struct list_head vqs;
- u32 features;
+ u64 features;
void *priv;
};
diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h
--- a/include/linux/virtio_config.h
+++ b/include/linux/virtio_config.h
@@ -117,7 +117,7 @@ struct virtio_config_ops {
vq_callback_t *callbacks[],
const char *names[]);
void (*del_vqs)(struct virtio_device *);
- u32 (*get_features)(struct virtio_device *vdev);
+ u64 (*get_features)(struct virtio_device *vdev);
void (*finalize_features)(struct virtio_device *vdev);
};
@@ -135,14 +135,14 @@ static inline bool virtio_has_feature(co
{
/* Did you forget to fix assumptions on max features? */
if (__builtin_constant_p(fbit))
- BUILD_BUG_ON(fbit >= 32);
+ BUILD_BUG_ON(fbit >= 64);
else
- BUG_ON(fbit >= 32);
+ BUG_ON(fbit >= 64);
if (fbit < VIRTIO_TRANSPORT_F_START)
virtio_check_driver_offered_feature(vdev, fbit);
- return vdev->features & (1 << fbit);
+ return vdev->features & (1ULL << fbit);
}
/**
diff --git a/tools/virtio/linux/virtio.h b/tools/virtio/linux/virtio.h
--- a/tools/virtio/linux/virtio.h
+++ b/tools/virtio/linux/virtio.h
@@ -134,12 +134,12 @@ static inline void kfree(void *p)
/* The only feature we care to support */
#define virtio_has_feature(dev, feature) \
- ((dev)->features & (1 << (feature)))
+ ((dev)->features & (1ULL << (feature)))
/* end of stubs */
struct virtio_device {
void *dev;
- u32 features;
+ u64 features;
};
struct virtqueue {
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