vhost/virtio: 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. Cc: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQEcBAABAgAGBQJUkSztAAoJECgfDbjSjVRp5DkH/ibw+0ZaEFP/SXWnw6WONpaG pzMsrfMG/vxlOfutSUdDqG+oqqU2fSLvFq5qDK6Xk9/emRSwGduz29ZaxGh8J1MZ /Ojqtu/HSLl+UASTs+fMw49itghoIjmAPBwwMkQjvanfqLclgdz9UxzoCOc4YkO0 PJQA/Vw6blVSP1m0p97PvzZkAiIetI2ixZn2vPJZc8vSkOHtygM9HdXKTv785HbG ycRbR9B3OBMvq26FIuWeyuY93FnyX2Qtf2bzwSSRdzo7qlsNhVVG7sKyWOOR+1xG TLmjhyTF57oA2GgZCVfgnFxsfiuIKMumfG0jbABTXmBGgA/ULef7HcF/lzLgdq8= =32cU -----END PGP SIGNATURE----- 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
This commit is contained in:
Linus Torvalds
Коммит
64ec45bff6
|
|
@ -326,21 +326,27 @@ static int mic_vdev_info_show(struct seq_file *s, void *unused)
|
|||
}
|
||||
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);
|
||||
|
|
|
|||
|
|
@ -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 @@ static __printf(1,2) __cold void vringh_bad(const char *fmt, ...)
|
|||
|
||||
/* 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 @@ static inline int __vringh_get_head(const struct vringh *vrh,
|
|||
|
||||
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 @@ static inline bool no_range_check(struct vringh *vrh, u64 addr, size_t *len,
|
|||
}
|
||||
|
||||
/* 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 @@ __vringh_iov(struct vringh *vrh, u16 i,
|
|||
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 @@ __vringh_iov(struct vringh *vrh, u16 i,
|
|||
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 @@ __vringh_iov(struct vringh *vrh, u16 i,
|
|||
|
||||
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 @@ __vringh_iov(struct vringh *vrh, u16 i,
|
|||
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 @@ fail:
|
|||
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 @@ static inline int __vringh_complete(struct vringh *vrh,
|
|||
/* 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_complete(struct vringh *vrh,
|
|||
|
||||
|
||||
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 @@ static inline int __vringh_need_notify(struct vringh *vrh,
|
|||
/* 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 @@ static inline int __vringh_need_notify(struct vringh *vrh,
|
|||
}
|
||||
|
||||
/* 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 int __vringh_need_notify(struct vringh *vrh,
|
|||
}
|
||||
|
||||
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 @@ static inline bool __vringh_notify_enable(struct vringh *vrh,
|
|||
* 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 bool __vringh_notify_enable(struct vringh *vrh,
|
|||
}
|
||||
|
||||
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 @@ static inline void __vringh_notify_disable(struct vringh *vrh,
|
|||
}
|
||||
|
||||
/* 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 @@ static inline int xfer_to_user(void *dst, void *src, size_t len)
|
|||
* 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 @@ int vringh_init_user(struct vringh *vrh, u32 features,
|
|||
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 @@ int vringh_complete_user(struct vringh *vrh, u16 head, u32 len)
|
|||
{
|
||||
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 @@ int vringh_need_notify_user(struct vringh *vrh)
|
|||
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 @@ static inline int xfer_kern(void *src, void *dst, size_t len)
|
|||
*
|
||||
* 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 @@ int vringh_init_kern(struct vringh *vrh, u32 features,
|
|||
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 @@ int vringh_complete_kern(struct vringh *vrh, u16 head, u32 len)
|
|||
{
|
||||
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);
|
||||
}
|
||||
|
|
|
|||
|
|
@ -162,6 +162,27 @@ static void virtio_config_enable(struct virtio_device *dev)
|
|||
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 @@ static int virtio_dev_probe(struct device *_d)
|
|||
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 @@ static int virtio_dev_probe(struct device *_d)
|
|||
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 @@ int virtio_device_restore(struct virtio_device *dev)
|
|||
/* 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;
|
||||
|
||||
|
|
|
|||
|
|
@ -458,7 +458,44 @@ static int virtio_pci_restore(struct device *dev)
|
|||
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");
|
||||
|
|
|
|||
|
|
@ -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 @@ const char *vp_bus_name(struct virtio_device *vdev);
|
|||
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
|
||||
|
|
|
|||
|
|
@ -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 @@ static const struct virtio_config_ops virtio_pci_config_ops = {
|
|||
};
|
||||
|
||||
/* 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 @@ out:
|
|||
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 @@ static void virtio_pci_remove(struct pci_dev *pci_dev)
|
|||
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);
|
||||
|
|
|
|||
|
|
@ -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 @@ struct virtio_config_ops {
|
|||
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 @@ static inline u8 virtio_cread8(struct virtio_device *vdev, unsigned int offset)
|
|||
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 @@ static inline u64 virtio_cread64(struct virtio_device *vdev,
|
|||
{
|
||||
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);
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -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 @@ struct vringh_kiov {
|
|||
#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 @@ bool vringh_notify_enable_user(struct vringh *vrh);
|
|||
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 @@ static inline void vringh_notify(struct vringh *vrh)
|
|||
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 */
|
||||
|
|
|
|||
|
|
@ -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
|
||||
|
|
|
|||
|
|
@ -3,7 +3,7 @@ test: virtio_test vringh_test
|
|||
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
|
||||
|
|
|
|||
|
|
@ -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 {
|
||||
|
|
|
|||
|
|
@ -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
|
||||
|
|
@ -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);
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -0,0 +1 @@
|
|||
#include "../../include/uapi/linux/virtio_types.h"
|
||||
|
|
@ -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>
|
||||
|
|
@ -226,6 +227,14 @@ const struct option longopts[] = {
|
|||
.name = "no-indirect",
|
||||
.val = 'i',
|
||||
},
|
||||
{
|
||||
.name = "virtio-1",
|
||||
.val = '1',
|
||||
},
|
||||
{
|
||||
.name = "no-virtio-1",
|
||||
.val = '0',
|
||||
},
|
||||
{
|
||||
.name = "delayed-interrupt",
|
||||
.val = 'D',
|
||||
|
|
@ -243,6 +252,7 @@ static void help(void)
|
|||
fprintf(stderr, "Usage: virtio_test [--help]"
|
||||
" [--no-indirect]"
|
||||
" [--no-event-idx]"
|
||||
" [--no-virtio-1]"
|
||||
" [--delayed-interrupt]"
|
||||
"\n");
|
||||
}
|
||||
|
|
@ -251,7 +261,7 @@ int main(int argc, char **argv)
|
|||
{
|
||||
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 @@ int main(int argc, char **argv)
|
|||
case 'i':
|
||||
features &= ~(1ULL << VIRTIO_RING_F_INDIRECT_DESC);
|
||||
break;
|
||||
case '0':
|
||||
features &= ~(1ULL << VIRTIO_F_VERSION_1);
|
||||
break;
|
||||
case 'D':
|
||||
delayed = true;
|
||||
break;
|
||||
|
|
|
|||
|
|
@ -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 @@ static inline int vringh_get_head(struct vringh *vrh, u16 *head)
|
|||
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 @@ int main(int argc, char *argv[])
|
|||
__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)
|
||||
|
|
|
|||
Загрузка…
Ссылка в новой задаче