Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
Pull virtio fixes from Michael S Tsirkin:
"virtio 1.0 related fixes
Most importantly, this fixes using virtio_pci as a module.
Further, the big virtio 1.0 conversion missed a couple of places.
This fixes them up.
This isn't 100% sparse-clean yet because on many architectures
get_user triggers sparse warnings when used with __bitwise tag (when
same tag is on both pointer and value read).
I posted a patchset to fix it up by adding __force on all arches that
don't already have it (many do), when that's merged these warnings
will go away"
* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
virtio_pci: restore module attributes
mic/host: fix up virtio 1.0 APIs
vringh: update for virtio 1.0 APIs
vringh: 64 bit features
tools/virtio: add virtio 1.0 in vringh_test
tools/virtio: add virtio 1.0 in virtio_test
tools/virtio: enable -Werror
tools/virtio: 64 bit features
tools/virtio: fix vringh test
tools/virtio: more stubs
virtio: core support for config generation
virtio_pci: add VIRTIO_PCI_NO_LEGACY
virtio_pci: move probe to common file
virtio_pci_common.h: drop VIRTIO_PCI_NO_LEGACY
virtio_config: fix virtio_cread_bytes
virtio: set VIRTIO_CONFIG_S_FEATURES_OK on restore
diff --git a/drivers/misc/mic/host/mic_debugfs.c b/drivers/misc/mic/host/mic_debugfs.c
index 028ba5d6..687e9aa 100644
--- a/drivers/misc/mic/host/mic_debugfs.c
+++ b/drivers/misc/mic/host/mic_debugfs.c
@@ -326,21 +326,27 @@
}
avail = vrh->vring.avail;
seq_printf(s, "avail flags 0x%x idx %d\n",
- avail->flags, avail->idx & (num - 1));
+ vringh16_to_cpu(vrh, avail->flags),
+ vringh16_to_cpu(vrh, avail->idx) & (num - 1));
seq_printf(s, "avail flags 0x%x idx %d\n",
- avail->flags, avail->idx);
+ vringh16_to_cpu(vrh, avail->flags),
+ vringh16_to_cpu(vrh, avail->idx));
for (j = 0; j < num; j++)
seq_printf(s, "avail ring[%d] %d\n",
j, avail->ring[j]);
used = vrh->vring.used;
seq_printf(s, "used flags 0x%x idx %d\n",
- used->flags, used->idx & (num - 1));
+ vringh16_to_cpu(vrh, used->flags),
+ vringh16_to_cpu(vrh, used->idx) & (num - 1));
seq_printf(s, "used flags 0x%x idx %d\n",
- used->flags, used->idx);
+ vringh16_to_cpu(vrh, used->flags),
+ vringh16_to_cpu(vrh, used->idx));
for (j = 0; j < num; j++)
seq_printf(s, "used ring[%d] id %d len %d\n",
- j, used->ring[j].id,
- used->ring[j].len);
+ j, vringh32_to_cpu(vrh,
+ used->ring[j].id),
+ vringh32_to_cpu(vrh,
+ used->ring[j].len));
}
}
mutex_unlock(&mdev->mic_mutex);
diff --git a/drivers/vhost/vringh.c b/drivers/vhost/vringh.c
index 5174eba..3bb02c6 100644
--- a/drivers/vhost/vringh.c
+++ b/drivers/vhost/vringh.c
@@ -11,6 +11,7 @@
#include <linux/uaccess.h>
#include <linux/slab.h>
#include <linux/export.h>
+#include <uapi/linux/virtio_config.h>
static __printf(1,2) __cold void vringh_bad(const char *fmt, ...)
{
@@ -28,13 +29,14 @@
/* Returns vring->num if empty, -ve on error. */
static inline int __vringh_get_head(const struct vringh *vrh,
- int (*getu16)(u16 *val, const u16 *p),
+ int (*getu16)(const struct vringh *vrh,
+ u16 *val, const __virtio16 *p),
u16 *last_avail_idx)
{
u16 avail_idx, i, head;
int err;
- err = getu16(&avail_idx, &vrh->vring.avail->idx);
+ err = getu16(vrh, &avail_idx, &vrh->vring.avail->idx);
if (err) {
vringh_bad("Failed to access avail idx at %p",
&vrh->vring.avail->idx);
@@ -49,7 +51,7 @@
i = *last_avail_idx & (vrh->vring.num - 1);
- err = getu16(&head, &vrh->vring.avail->ring[i]);
+ err = getu16(vrh, &head, &vrh->vring.avail->ring[i]);
if (err) {
vringh_bad("Failed to read head: idx %d address %p",
*last_avail_idx, &vrh->vring.avail->ring[i]);
@@ -144,28 +146,32 @@
}
/* No reason for this code to be inline. */
-static int move_to_indirect(int *up_next, u16 *i, void *addr,
+static int move_to_indirect(const struct vringh *vrh,
+ int *up_next, u16 *i, void *addr,
const struct vring_desc *desc,
struct vring_desc **descs, int *desc_max)
{
+ u32 len;
+
/* Indirect tables can't have indirect. */
if (*up_next != -1) {
vringh_bad("Multilevel indirect %u->%u", *up_next, *i);
return -EINVAL;
}
- if (unlikely(desc->len % sizeof(struct vring_desc))) {
+ len = vringh32_to_cpu(vrh, desc->len);
+ if (unlikely(len % sizeof(struct vring_desc))) {
vringh_bad("Strange indirect len %u", desc->len);
return -EINVAL;
}
/* We will check this when we follow it! */
- if (desc->flags & VRING_DESC_F_NEXT)
- *up_next = desc->next;
+ if (desc->flags & cpu_to_vringh16(vrh, VRING_DESC_F_NEXT))
+ *up_next = vringh16_to_cpu(vrh, desc->next);
else
*up_next = -2;
*descs = addr;
- *desc_max = desc->len / sizeof(struct vring_desc);
+ *desc_max = len / sizeof(struct vring_desc);
/* Now, start at the first indirect. */
*i = 0;
@@ -287,22 +293,25 @@
if (unlikely(err))
goto fail;
- if (unlikely(desc.flags & VRING_DESC_F_INDIRECT)) {
+ if (unlikely(desc.flags &
+ cpu_to_vringh16(vrh, VRING_DESC_F_INDIRECT))) {
+ u64 a = vringh64_to_cpu(vrh, desc.addr);
+
/* Make sure it's OK, and get offset. */
- len = desc.len;
- if (!rcheck(vrh, desc.addr, &len, &range, getrange)) {
+ len = vringh32_to_cpu(vrh, desc.len);
+ if (!rcheck(vrh, a, &len, &range, getrange)) {
err = -EINVAL;
goto fail;
}
- if (unlikely(len != desc.len)) {
+ if (unlikely(len != vringh32_to_cpu(vrh, desc.len))) {
slow = true;
/* We need to save this range to use offset */
slowrange = range;
}
- addr = (void *)(long)(desc.addr + range.offset);
- err = move_to_indirect(&up_next, &i, addr, &desc,
+ addr = (void *)(long)(a + range.offset);
+ err = move_to_indirect(vrh, &up_next, &i, addr, &desc,
&descs, &desc_max);
if (err)
goto fail;
@@ -315,7 +324,7 @@
goto fail;
}
- if (desc.flags & VRING_DESC_F_WRITE)
+ if (desc.flags & cpu_to_vringh16(vrh, VRING_DESC_F_WRITE))
iov = wiov;
else {
iov = riov;
@@ -336,12 +345,14 @@
again:
/* Make sure it's OK, and get offset. */
- len = desc.len;
- if (!rcheck(vrh, desc.addr, &len, &range, getrange)) {
+ len = vringh32_to_cpu(vrh, desc.len);
+ if (!rcheck(vrh, vringh64_to_cpu(vrh, desc.addr), &len, &range,
+ getrange)) {
err = -EINVAL;
goto fail;
}
- addr = (void *)(unsigned long)(desc.addr + range.offset);
+ addr = (void *)(unsigned long)(vringh64_to_cpu(vrh, desc.addr) +
+ range.offset);
if (unlikely(iov->used == (iov->max_num & ~VRINGH_IOV_ALLOCATED))) {
err = resize_iovec(iov, gfp);
@@ -353,14 +364,16 @@
iov->iov[iov->used].iov_len = len;
iov->used++;
- if (unlikely(len != desc.len)) {
- desc.len -= len;
- desc.addr += len;
+ if (unlikely(len != vringh32_to_cpu(vrh, desc.len))) {
+ desc.len = cpu_to_vringh32(vrh,
+ vringh32_to_cpu(vrh, desc.len) - len);
+ desc.addr = cpu_to_vringh64(vrh,
+ vringh64_to_cpu(vrh, desc.addr) + len);
goto again;
}
- if (desc.flags & VRING_DESC_F_NEXT) {
- i = desc.next;
+ if (desc.flags & cpu_to_vringh16(vrh, VRING_DESC_F_NEXT)) {
+ i = vringh16_to_cpu(vrh, desc.next);
} else {
/* Just in case we need to finish traversing above. */
if (unlikely(up_next > 0)) {
@@ -387,7 +400,8 @@
static inline int __vringh_complete(struct vringh *vrh,
const struct vring_used_elem *used,
unsigned int num_used,
- int (*putu16)(u16 *p, u16 val),
+ int (*putu16)(const struct vringh *vrh,
+ __virtio16 *p, u16 val),
int (*putused)(struct vring_used_elem *dst,
const struct vring_used_elem
*src, unsigned num))
@@ -420,7 +434,7 @@
/* Make sure buffer is written before we update index. */
virtio_wmb(vrh->weak_barriers);
- err = putu16(&vrh->vring.used->idx, used_idx + num_used);
+ err = putu16(vrh, &vrh->vring.used->idx, used_idx + num_used);
if (err) {
vringh_bad("Failed to update used index at %p",
&vrh->vring.used->idx);
@@ -433,7 +447,9 @@
static inline int __vringh_need_notify(struct vringh *vrh,
- int (*getu16)(u16 *val, const u16 *p))
+ int (*getu16)(const struct vringh *vrh,
+ u16 *val,
+ const __virtio16 *p))
{
bool notify;
u16 used_event;
@@ -447,7 +463,7 @@
/* Old-style, without event indices. */
if (!vrh->event_indices) {
u16 flags;
- err = getu16(&flags, &vrh->vring.avail->flags);
+ err = getu16(vrh, &flags, &vrh->vring.avail->flags);
if (err) {
vringh_bad("Failed to get flags at %p",
&vrh->vring.avail->flags);
@@ -457,7 +473,7 @@
}
/* Modern: we know when other side wants to know. */
- err = getu16(&used_event, &vring_used_event(&vrh->vring));
+ err = getu16(vrh, &used_event, &vring_used_event(&vrh->vring));
if (err) {
vringh_bad("Failed to get used event idx at %p",
&vring_used_event(&vrh->vring));
@@ -478,20 +494,22 @@
}
static inline bool __vringh_notify_enable(struct vringh *vrh,
- int (*getu16)(u16 *val, const u16 *p),
- int (*putu16)(u16 *p, u16 val))
+ int (*getu16)(const struct vringh *vrh,
+ u16 *val, const __virtio16 *p),
+ int (*putu16)(const struct vringh *vrh,
+ __virtio16 *p, u16 val))
{
u16 avail;
if (!vrh->event_indices) {
/* Old-school; update flags. */
- if (putu16(&vrh->vring.used->flags, 0) != 0) {
+ if (putu16(vrh, &vrh->vring.used->flags, 0) != 0) {
vringh_bad("Clearing used flags %p",
&vrh->vring.used->flags);
return true;
}
} else {
- if (putu16(&vring_avail_event(&vrh->vring),
+ if (putu16(vrh, &vring_avail_event(&vrh->vring),
vrh->last_avail_idx) != 0) {
vringh_bad("Updating avail event index %p",
&vring_avail_event(&vrh->vring));
@@ -503,7 +521,7 @@
* sure it's written, then check again. */
virtio_mb(vrh->weak_barriers);
- if (getu16(&avail, &vrh->vring.avail->idx) != 0) {
+ if (getu16(vrh, &avail, &vrh->vring.avail->idx) != 0) {
vringh_bad("Failed to check avail idx at %p",
&vrh->vring.avail->idx);
return true;
@@ -516,11 +534,13 @@
}
static inline void __vringh_notify_disable(struct vringh *vrh,
- int (*putu16)(u16 *p, u16 val))
+ int (*putu16)(const struct vringh *vrh,
+ __virtio16 *p, u16 val))
{
if (!vrh->event_indices) {
/* Old-school; update flags. */
- if (putu16(&vrh->vring.used->flags, VRING_USED_F_NO_NOTIFY)) {
+ if (putu16(vrh, &vrh->vring.used->flags,
+ VRING_USED_F_NO_NOTIFY)) {
vringh_bad("Setting used flags %p",
&vrh->vring.used->flags);
}
@@ -528,14 +548,18 @@
}
/* Userspace access helpers: in this case, addresses are really userspace. */
-static inline int getu16_user(u16 *val, const u16 *p)
+static inline int getu16_user(const struct vringh *vrh, u16 *val, const __virtio16 *p)
{
- return get_user(*val, (__force u16 __user *)p);
+ __virtio16 v = 0;
+ int rc = get_user(v, (__force __virtio16 __user *)p);
+ *val = vringh16_to_cpu(vrh, v);
+ return rc;
}
-static inline int putu16_user(u16 *p, u16 val)
+static inline int putu16_user(const struct vringh *vrh, __virtio16 *p, u16 val)
{
- return put_user(val, (__force u16 __user *)p);
+ __virtio16 v = cpu_to_vringh16(vrh, val);
+ return put_user(v, (__force __virtio16 __user *)p);
}
static inline int copydesc_user(void *dst, const void *src, size_t len)
@@ -577,7 +601,7 @@
* Returns an error if num is invalid: you should check pointers
* yourself!
*/
-int vringh_init_user(struct vringh *vrh, u32 features,
+int vringh_init_user(struct vringh *vrh, u64 features,
unsigned int num, bool weak_barriers,
struct vring_desc __user *desc,
struct vring_avail __user *avail,
@@ -589,6 +613,7 @@
return -EINVAL;
}
+ vrh->little_endian = (features & (1ULL << VIRTIO_F_VERSION_1));
vrh->event_indices = (features & (1 << VIRTIO_RING_F_EVENT_IDX));
vrh->weak_barriers = weak_barriers;
vrh->completed = 0;
@@ -729,8 +754,8 @@
{
struct vring_used_elem used;
- used.id = head;
- used.len = len;
+ used.id = cpu_to_vringh32(vrh, head);
+ used.len = cpu_to_vringh32(vrh, len);
return __vringh_complete(vrh, &used, 1, putu16_user, putused_user);
}
EXPORT_SYMBOL(vringh_complete_user);
@@ -792,15 +817,16 @@
EXPORT_SYMBOL(vringh_need_notify_user);
/* Kernelspace access helpers. */
-static inline int getu16_kern(u16 *val, const u16 *p)
+static inline int getu16_kern(const struct vringh *vrh,
+ u16 *val, const __virtio16 *p)
{
- *val = ACCESS_ONCE(*p);
+ *val = vringh16_to_cpu(vrh, ACCESS_ONCE(*p));
return 0;
}
-static inline int putu16_kern(u16 *p, u16 val)
+static inline int putu16_kern(const struct vringh *vrh, __virtio16 *p, u16 val)
{
- ACCESS_ONCE(*p) = val;
+ ACCESS_ONCE(*p) = cpu_to_vringh16(vrh, val);
return 0;
}
@@ -836,7 +862,7 @@
*
* Returns an error if num is invalid.
*/
-int vringh_init_kern(struct vringh *vrh, u32 features,
+int vringh_init_kern(struct vringh *vrh, u64 features,
unsigned int num, bool weak_barriers,
struct vring_desc *desc,
struct vring_avail *avail,
@@ -848,6 +874,7 @@
return -EINVAL;
}
+ vrh->little_endian = (features & (1ULL << VIRTIO_F_VERSION_1));
vrh->event_indices = (features & (1 << VIRTIO_RING_F_EVENT_IDX));
vrh->weak_barriers = weak_barriers;
vrh->completed = 0;
@@ -962,8 +989,8 @@
{
struct vring_used_elem used;
- used.id = head;
- used.len = len;
+ used.id = cpu_to_vringh32(vrh, head);
+ used.len = cpu_to_vringh32(vrh, len);
return __vringh_complete(vrh, &used, 1, putu16_kern, putused_kern);
}
diff --git a/drivers/virtio/virtio.c b/drivers/virtio/virtio.c
index f226658..b9f70df 100644
--- a/drivers/virtio/virtio.c
+++ b/drivers/virtio/virtio.c
@@ -162,6 +162,27 @@
spin_unlock_irq(&dev->config_lock);
}
+static int virtio_finalize_features(struct virtio_device *dev)
+{
+ int ret = dev->config->finalize_features(dev);
+ unsigned status;
+
+ if (ret)
+ return ret;
+
+ if (!virtio_has_feature(dev, VIRTIO_F_VERSION_1))
+ return 0;
+
+ add_status(dev, VIRTIO_CONFIG_S_FEATURES_OK);
+ status = dev->config->get_status(dev);
+ if (!(status & VIRTIO_CONFIG_S_FEATURES_OK)) {
+ dev_err(&dev->dev, "virtio: device refuses features: %x\n",
+ status);
+ return -ENODEV;
+ }
+ return 0;
+}
+
static int virtio_dev_probe(struct device *_d)
{
int err, i;
@@ -170,7 +191,6 @@
u64 device_features;
u64 driver_features;
u64 driver_features_legacy;
- unsigned status;
/* We have a driver! */
add_status(dev, VIRTIO_CONFIG_S_DRIVER);
@@ -208,21 +228,10 @@
if (device_features & (1ULL << i))
__virtio_set_bit(dev, i);
- err = dev->config->finalize_features(dev);
+ err = virtio_finalize_features(dev);
if (err)
goto err;
- if (virtio_has_feature(dev, VIRTIO_F_VERSION_1)) {
- add_status(dev, VIRTIO_CONFIG_S_FEATURES_OK);
- status = dev->config->get_status(dev);
- if (!(status & VIRTIO_CONFIG_S_FEATURES_OK)) {
- dev_err(_d, "virtio: device refuses features: %x\n",
- status);
- err = -ENODEV;
- goto err;
- }
- }
-
err = drv->probe(dev);
if (err)
goto err;
@@ -372,7 +381,7 @@
/* We have a driver! */
add_status(dev, VIRTIO_CONFIG_S_DRIVER);
- ret = dev->config->finalize_features(dev);
+ ret = virtio_finalize_features(dev);
if (ret)
goto err;
diff --git a/drivers/virtio/virtio_pci_common.c b/drivers/virtio/virtio_pci_common.c
index 953057d..2ef9529 100644
--- a/drivers/virtio/virtio_pci_common.c
+++ b/drivers/virtio/virtio_pci_common.c
@@ -458,7 +458,44 @@
return virtio_device_restore(&vp_dev->vdev);
}
-const struct dev_pm_ops virtio_pci_pm_ops = {
+static const struct dev_pm_ops virtio_pci_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(virtio_pci_freeze, virtio_pci_restore)
};
#endif
+
+
+/* Qumranet donated their vendor ID for devices 0x1000 thru 0x10FF. */
+static const struct pci_device_id virtio_pci_id_table[] = {
+ { PCI_DEVICE(0x1af4, PCI_ANY_ID) },
+ { 0 }
+};
+
+MODULE_DEVICE_TABLE(pci, virtio_pci_id_table);
+
+static int virtio_pci_probe(struct pci_dev *pci_dev,
+ const struct pci_device_id *id)
+{
+ return virtio_pci_legacy_probe(pci_dev, id);
+}
+
+static void virtio_pci_remove(struct pci_dev *pci_dev)
+{
+ virtio_pci_legacy_remove(pci_dev);
+}
+
+static struct pci_driver virtio_pci_driver = {
+ .name = "virtio-pci",
+ .id_table = virtio_pci_id_table,
+ .probe = virtio_pci_probe,
+ .remove = virtio_pci_remove,
+#ifdef CONFIG_PM_SLEEP
+ .driver.pm = &virtio_pci_pm_ops,
+#endif
+};
+
+module_pci_driver(virtio_pci_driver);
+
+MODULE_AUTHOR("Anthony Liguori <aliguori@us.ibm.com>");
+MODULE_DESCRIPTION("virtio-pci");
+MODULE_LICENSE("GPL");
+MODULE_VERSION("1");
diff --git a/drivers/virtio/virtio_pci_common.h b/drivers/virtio/virtio_pci_common.h
index d840dad..adddb64 100644
--- a/drivers/virtio/virtio_pci_common.h
+++ b/drivers/virtio/virtio_pci_common.h
@@ -27,7 +27,6 @@
#include <linux/virtio.h>
#include <linux/virtio_config.h>
#include <linux/virtio_ring.h>
-#define VIRTIO_PCI_NO_LEGACY
#include <linux/virtio_pci.h>
#include <linux/highmem.h>
#include <linux/spinlock.h>
@@ -129,8 +128,8 @@
int vp_set_vq_affinity(struct virtqueue *vq, int cpu);
void virtio_pci_release_dev(struct device *);
-#ifdef CONFIG_PM_SLEEP
-extern const struct dev_pm_ops virtio_pci_pm_ops;
-#endif
+int virtio_pci_legacy_probe(struct pci_dev *pci_dev,
+ const struct pci_device_id *id);
+void virtio_pci_legacy_remove(struct pci_dev *pci_dev);
#endif
diff --git a/drivers/virtio/virtio_pci_legacy.c b/drivers/virtio/virtio_pci_legacy.c
index 2588252..6c76f0f 100644
--- a/drivers/virtio/virtio_pci_legacy.c
+++ b/drivers/virtio/virtio_pci_legacy.c
@@ -19,14 +19,6 @@
#include "virtio_pci_common.h"
-/* Qumranet donated their vendor ID for devices 0x1000 thru 0x10FF. */
-static const struct pci_device_id virtio_pci_id_table[] = {
- { PCI_DEVICE(0x1af4, PCI_ANY_ID) },
- { 0 }
-};
-
-MODULE_DEVICE_TABLE(pci, virtio_pci_id_table);
-
/* virtio config->get_features() implementation */
static u64 vp_get_features(struct virtio_device *vdev)
{
@@ -220,7 +212,7 @@
};
/* the PCI probing function */
-static int virtio_pci_probe(struct pci_dev *pci_dev,
+int virtio_pci_legacy_probe(struct pci_dev *pci_dev,
const struct pci_device_id *id)
{
struct virtio_pci_device *vp_dev;
@@ -300,7 +292,7 @@
return err;
}
-static void virtio_pci_remove(struct pci_dev *pci_dev)
+void virtio_pci_legacy_remove(struct pci_dev *pci_dev)
{
struct virtio_pci_device *vp_dev = pci_get_drvdata(pci_dev);
@@ -312,15 +304,3 @@
pci_disable_device(pci_dev);
kfree(vp_dev);
}
-
-static struct pci_driver virtio_pci_driver = {
- .name = "virtio-pci",
- .id_table = virtio_pci_id_table,
- .probe = virtio_pci_probe,
- .remove = virtio_pci_remove,
-#ifdef CONFIG_PM_SLEEP
- .driver.pm = &virtio_pci_pm_ops,
-#endif
-};
-
-module_pci_driver(virtio_pci_driver);
diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h
index 7979f85..ca3ed78 100644
--- a/include/linux/virtio_config.h
+++ b/include/linux/virtio_config.h
@@ -19,6 +19,9 @@
* offset: the offset of the configuration field
* buf: the buffer to read the field value from.
* len: the length of the buffer
+ * @generation: config generation counter
+ * vdev: the virtio_device
+ * Returns the config generation counter
* @get_status: read the status byte
* vdev: the virtio_device
* Returns the status byte
@@ -60,6 +63,7 @@
void *buf, unsigned len);
void (*set)(struct virtio_device *vdev, unsigned offset,
const void *buf, unsigned len);
+ u32 (*generation)(struct virtio_device *vdev);
u8 (*get_status)(struct virtio_device *vdev);
void (*set_status)(struct virtio_device *vdev, u8 status);
void (*reset)(struct virtio_device *vdev);
@@ -301,11 +305,33 @@
return ret;
}
+/* Read @count fields, @bytes each. */
+static inline void __virtio_cread_many(struct virtio_device *vdev,
+ unsigned int offset,
+ void *buf, size_t count, size_t bytes)
+{
+ u32 old, gen = vdev->config->generation ?
+ vdev->config->generation(vdev) : 0;
+ int i;
+
+ do {
+ old = gen;
+
+ for (i = 0; i < count; i++)
+ vdev->config->get(vdev, offset + bytes * i,
+ buf + i * bytes, bytes);
+
+ gen = vdev->config->generation ?
+ vdev->config->generation(vdev) : 0;
+ } while (gen != old);
+}
+
+
static inline void virtio_cread_bytes(struct virtio_device *vdev,
unsigned int offset,
void *buf, size_t len)
{
- vdev->config->get(vdev, offset, buf, len);
+ __virtio_cread_many(vdev, offset, buf, len, 1);
}
static inline void virtio_cwrite8(struct virtio_device *vdev,
@@ -349,6 +375,7 @@
{
u64 ret;
vdev->config->get(vdev, offset, &ret, sizeof(ret));
+ __virtio_cread_many(vdev, offset, &ret, 1, sizeof(ret));
return virtio64_to_cpu(vdev, (__force __virtio64)ret);
}
diff --git a/include/linux/vringh.h b/include/linux/vringh.h
index 749cde2..a3fa537 100644
--- a/include/linux/vringh.h
+++ b/include/linux/vringh.h
@@ -24,12 +24,16 @@
#ifndef _LINUX_VRINGH_H
#define _LINUX_VRINGH_H
#include <uapi/linux/virtio_ring.h>
+#include <linux/virtio_byteorder.h>
#include <linux/uio.h>
#include <linux/slab.h>
#include <asm/barrier.h>
/* virtio_ring with information needed for host access. */
struct vringh {
+ /* Everything is little endian */
+ bool little_endian;
+
/* Guest publishes used event idx (note: we always do). */
bool event_indices;
@@ -105,7 +109,7 @@
#define VRINGH_IOV_ALLOCATED 0x8000000
/* Helpers for userspace vrings. */
-int vringh_init_user(struct vringh *vrh, u32 features,
+int vringh_init_user(struct vringh *vrh, u64 features,
unsigned int num, bool weak_barriers,
struct vring_desc __user *desc,
struct vring_avail __user *avail,
@@ -167,7 +171,7 @@
void vringh_notify_disable_user(struct vringh *vrh);
/* Helpers for kernelspace vrings. */
-int vringh_init_kern(struct vringh *vrh, u32 features,
+int vringh_init_kern(struct vringh *vrh, u64 features,
unsigned int num, bool weak_barriers,
struct vring_desc *desc,
struct vring_avail *avail,
@@ -222,4 +226,33 @@
vrh->notify(vrh);
}
+static inline u16 vringh16_to_cpu(const struct vringh *vrh, __virtio16 val)
+{
+ return __virtio16_to_cpu(vrh->little_endian, val);
+}
+
+static inline __virtio16 cpu_to_vringh16(const struct vringh *vrh, u16 val)
+{
+ return __cpu_to_virtio16(vrh->little_endian, val);
+}
+
+static inline u32 vringh32_to_cpu(const struct vringh *vrh, __virtio32 val)
+{
+ return __virtio32_to_cpu(vrh->little_endian, val);
+}
+
+static inline __virtio32 cpu_to_vringh32(const struct vringh *vrh, u32 val)
+{
+ return __cpu_to_virtio32(vrh->little_endian, val);
+}
+
+static inline u64 vringh64_to_cpu(const struct vringh *vrh, __virtio64 val)
+{
+ return __virtio64_to_cpu(vrh->little_endian, val);
+}
+
+static inline __virtio64 cpu_to_vringh64(const struct vringh *vrh, u64 val)
+{
+ return __cpu_to_virtio64(vrh->little_endian, val);
+}
#endif /* _LINUX_VRINGH_H */
diff --git a/include/uapi/linux/virtio_pci.h b/include/uapi/linux/virtio_pci.h
index e5ec1ca..35b552c7 100644
--- a/include/uapi/linux/virtio_pci.h
+++ b/include/uapi/linux/virtio_pci.h
@@ -41,6 +41,8 @@
#include <linux/virtio_config.h>
+#ifndef VIRTIO_PCI_NO_LEGACY
+
/* A 32-bit r/o bitmask of the features supported by the host */
#define VIRTIO_PCI_HOST_FEATURES 0
@@ -67,16 +69,11 @@
* a read-and-acknowledge. */
#define VIRTIO_PCI_ISR 19
-/* The bit of the ISR which indicates a device configuration change. */
-#define VIRTIO_PCI_ISR_CONFIG 0x2
-
/* 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
-/* Vector value used to disable MSI for queue */
-#define VIRTIO_MSI_NO_VECTOR 0xffff
/* The remaining space is defined by each driver as the per-driver
* configuration space */
@@ -94,4 +91,12 @@
/* The alignment to use between consumer and producer parts of vring.
* x86 pagesize again. */
#define VIRTIO_PCI_VRING_ALIGN 4096
+
+#endif /* VIRTIO_PCI_NO_LEGACY */
+
+/* The bit of the ISR which indicates a device configuration change. */
+#define VIRTIO_PCI_ISR_CONFIG 0x2
+/* Vector value used to disable MSI for queue */
+#define VIRTIO_MSI_NO_VECTOR 0xffff
+
#endif
diff --git a/tools/virtio/Makefile b/tools/virtio/Makefile
index 9325f46..505ad51 100644
--- a/tools/virtio/Makefile
+++ b/tools/virtio/Makefile
@@ -3,7 +3,7 @@
virtio_test: virtio_ring.o virtio_test.o
vringh_test: vringh_test.o vringh.o virtio_ring.o
-CFLAGS += -g -O2 -Wall -I. -I../include/ -I ../../usr/include/ -Wno-pointer-sign -fno-strict-overflow -fno-strict-aliasing -fno-common -MMD -U_FORTIFY_SOURCE
+CFLAGS += -g -O2 -Werror -Wall -I. -I../include/ -I ../../usr/include/ -Wno-pointer-sign -fno-strict-overflow -fno-strict-aliasing -fno-common -MMD -U_FORTIFY_SOURCE
vpath %.c ../../drivers/virtio ../../drivers/vhost
mod:
${MAKE} -C `pwd`/../.. M=`pwd`/vhost_test
diff --git a/tools/virtio/linux/virtio.h b/tools/virtio/linux/virtio.h
index 8eb6421..a3e0701 100644
--- a/tools/virtio/linux/virtio.h
+++ b/tools/virtio/linux/virtio.h
@@ -6,6 +6,7 @@
/* TODO: empty stubs for now. Broken but enough for virtio_ring.c */
#define list_add_tail(a, b) do {} while (0)
#define list_del(a) do {} while (0)
+#define list_for_each_entry(a, b, c) while (0)
/* end of stubs */
struct virtio_device {
diff --git a/tools/virtio/linux/virtio_byteorder.h b/tools/virtio/linux/virtio_byteorder.h
new file mode 100644
index 0000000..9de9e6a
--- /dev/null
+++ b/tools/virtio/linux/virtio_byteorder.h
@@ -0,0 +1,8 @@
+#ifndef _LINUX_VIRTIO_BYTEORDER_STUB_H
+#define _LINUX_VIRTIO_BYTEORDER_STUB_H
+
+#include <asm/byteorder.h>
+#include "../../include/linux/byteorder/generic.h"
+#include "../../include/linux/virtio_byteorder.h"
+
+#endif
diff --git a/tools/virtio/linux/virtio_config.h b/tools/virtio/linux/virtio_config.h
index 83b27e8..806d683 100644
--- a/tools/virtio/linux/virtio_config.h
+++ b/tools/virtio/linux/virtio_config.h
@@ -1,6 +1,72 @@
-#define VIRTIO_TRANSPORT_F_START 28
-#define VIRTIO_TRANSPORT_F_END 32
+#include <linux/virtio_byteorder.h>
+#include <linux/virtio.h>
+#include <uapi/linux/virtio_config.h>
+
+/*
+ * __virtio_test_bit - helper to test feature bits. For use by transports.
+ * Devices should normally use virtio_has_feature,
+ * which includes more checks.
+ * @vdev: the device
+ * @fbit: the feature bit
+ */
+static inline bool __virtio_test_bit(const struct virtio_device *vdev,
+ unsigned int fbit)
+{
+ return vdev->features & (1ULL << fbit);
+}
+
+/**
+ * __virtio_set_bit - helper to set feature bits. For use by transports.
+ * @vdev: the device
+ * @fbit: the feature bit
+ */
+static inline void __virtio_set_bit(struct virtio_device *vdev,
+ unsigned int fbit)
+{
+ vdev->features |= (1ULL << fbit);
+}
+
+/**
+ * __virtio_clear_bit - helper to clear feature bits. For use by transports.
+ * @vdev: the device
+ * @fbit: the feature bit
+ */
+static inline void __virtio_clear_bit(struct virtio_device *vdev,
+ unsigned int fbit)
+{
+ vdev->features &= ~(1ULL << fbit);
+}
#define virtio_has_feature(dev, feature) \
(__virtio_test_bit((dev), feature))
+static inline u16 virtio16_to_cpu(struct virtio_device *vdev, __virtio16 val)
+{
+ return __virtio16_to_cpu(virtio_has_feature(vdev, VIRTIO_F_VERSION_1), val);
+}
+
+static inline __virtio16 cpu_to_virtio16(struct virtio_device *vdev, u16 val)
+{
+ return __cpu_to_virtio16(virtio_has_feature(vdev, VIRTIO_F_VERSION_1), val);
+}
+
+static inline u32 virtio32_to_cpu(struct virtio_device *vdev, __virtio32 val)
+{
+ return __virtio32_to_cpu(virtio_has_feature(vdev, VIRTIO_F_VERSION_1), val);
+}
+
+static inline __virtio32 cpu_to_virtio32(struct virtio_device *vdev, u32 val)
+{
+ return __cpu_to_virtio32(virtio_has_feature(vdev, VIRTIO_F_VERSION_1), val);
+}
+
+static inline u64 virtio64_to_cpu(struct virtio_device *vdev, __virtio64 val)
+{
+ return __virtio64_to_cpu(virtio_has_feature(vdev, VIRTIO_F_VERSION_1), val);
+}
+
+static inline __virtio64 cpu_to_virtio64(struct virtio_device *vdev, u64 val)
+{
+ return __cpu_to_virtio64(virtio_has_feature(vdev, VIRTIO_F_VERSION_1), val);
+}
+
diff --git a/tools/virtio/uapi/linux/virtio_types.h b/tools/virtio/uapi/linux/virtio_types.h
new file mode 100644
index 0000000..e7a1096
--- /dev/null
+++ b/tools/virtio/uapi/linux/virtio_types.h
@@ -0,0 +1 @@
+#include "../../include/uapi/linux/virtio_types.h"
diff --git a/tools/virtio/virtio_test.c b/tools/virtio/virtio_test.c
index db3437c..e044589 100644
--- a/tools/virtio/virtio_test.c
+++ b/tools/virtio/virtio_test.c
@@ -11,6 +11,7 @@
#include <sys/types.h>
#include <fcntl.h>
#include <stdbool.h>
+#include <linux/virtio_types.h>
#include <linux/vhost.h>
#include <linux/virtio.h>
#include <linux/virtio_ring.h>
@@ -227,6 +228,14 @@
.val = 'i',
},
{
+ .name = "virtio-1",
+ .val = '1',
+ },
+ {
+ .name = "no-virtio-1",
+ .val = '0',
+ },
+ {
.name = "delayed-interrupt",
.val = 'D',
},
@@ -243,6 +252,7 @@
fprintf(stderr, "Usage: virtio_test [--help]"
" [--no-indirect]"
" [--no-event-idx]"
+ " [--no-virtio-1]"
" [--delayed-interrupt]"
"\n");
}
@@ -251,7 +261,7 @@
{
struct vdev_info dev;
unsigned long long features = (1ULL << VIRTIO_RING_F_INDIRECT_DESC) |
- (1ULL << VIRTIO_RING_F_EVENT_IDX);
+ (1ULL << VIRTIO_RING_F_EVENT_IDX) | (1ULL << VIRTIO_F_VERSION_1);
int o;
bool delayed = false;
@@ -272,6 +282,9 @@
case 'i':
features &= ~(1ULL << VIRTIO_RING_F_INDIRECT_DESC);
break;
+ case '0':
+ features &= ~(1ULL << VIRTIO_F_VERSION_1);
+ break;
case 'D':
delayed = true;
break;
diff --git a/tools/virtio/vringh_test.c b/tools/virtio/vringh_test.c
index 9d4b1bc..5f94f51 100644
--- a/tools/virtio/vringh_test.c
+++ b/tools/virtio/vringh_test.c
@@ -7,6 +7,7 @@
#include <linux/virtio.h>
#include <linux/vringh.h>
#include <linux/virtio_ring.h>
+#include <linux/virtio_config.h>
#include <linux/uaccess.h>
#include <sys/types.h>
#include <sys/stat.h>
@@ -131,7 +132,7 @@
return 1;
}
-static int parallel_test(unsigned long features,
+static int parallel_test(u64 features,
bool (*getrange)(struct vringh *vrh,
u64 addr, struct vringh_range *r),
bool fast_vringh)
@@ -456,6 +457,8 @@
__virtio_set_bit(&vdev, VIRTIO_RING_F_INDIRECT_DESC);
else if (strcmp(argv[1], "--eventidx") == 0)
__virtio_set_bit(&vdev, VIRTIO_RING_F_EVENT_IDX);
+ else if (strcmp(argv[1], "--virtio-1") == 0)
+ __virtio_set_bit(&vdev, VIRTIO_F_VERSION_1);
else if (strcmp(argv[1], "--slow-range") == 0)
getrange = getrange_slow;
else if (strcmp(argv[1], "--fast-vringh") == 0)