Displaying 20 results from an estimated 54 matches for "mmu_notifier_register".
2019 Jul 23
1
[PATCH 2/6] vhost: validate MMU notifier registration
On Tue, Jul 23, 2019 at 03:57:14AM -0400, Jason Wang wrote:
> The return value of mmu_notifier_register() is not checked in
> vhost_vring_set_num_addr(). This will cause an out of sync between mm
> and MMU notifier thus a double free. To solve this, introduce a
> boolean flag to track whether MMU notifier is registered and only do
> unregistering when it was true.
>
> Reported-and-...
2019 Jul 23
0
[PATCH 2/6] vhost: validate MMU notifier registration
The return value of mmu_notifier_register() is not checked in
vhost_vring_set_num_addr(). This will cause an out of sync between mm
and MMU notifier thus a double free. To solve this, introduce a
boolean flag to track whether MMU notifier is registered and only do
unregistering when it was true.
Reported-and-tested-by:
syzbot+e58112d71f77...
2019 Jul 23
10
[PATCH 0/6] Fixes for meta data acceleration
Hi all:
This series try to fix several issues introduced by meta data
accelreation series. Please review.
Jason Wang (6):
vhost: don't set uaddr for invalid address
vhost: validate MMU notifier registration
vhost: fix vhost map leak
vhost: reset invalidate_count in vhost_set_vring_num_addr()
vhost: mark dirty pages during map uninit
vhost: don't do synchronize_rcu() in
2019 Oct 28
0
[PATCH v2 01/15] mm/mmu_notifier: define the header pre-processor parts even if disabled
...hes zero
+ * in mmdrop().
+ */
+struct mmu_notifier_mm {
+ /* all mmu notifiers registered in this mm are queued in this list */
+ struct hlist_head list;
+ /* to serialize the list modifications and hlist_unhashed */
+ spinlock_t lock;
+};
+
/*
* This function can't run concurrently against mmu_notifier_register
* because mm->mm_users > 0 during mmu_notifier_register and exit_mmap
--
2.23.0
2019 Nov 12
0
[PATCH v3 01/14] mm/mmu_notifier: define the header pre-processor parts even if disabled
...hes zero
+ * in mmdrop().
+ */
+struct mmu_notifier_mm {
+ /* all mmu notifiers registered in this mm are queued in this list */
+ struct hlist_head list;
+ /* to serialize the list modifications and hlist_unhashed */
+ spinlock_t lock;
+};
+
/*
* This function can't run concurrently against mmu_notifier_register
* because mm->mm_users > 0 during mmu_notifier_register and exit_mmap
--
2.24.0
2019 Oct 28
0
[PATCH v2 02/15] mm/mmu_notifier: add an interval tree notifier
...+struct mmu_range_notifier {
+ struct interval_tree_node interval_tree;
+ const struct mmu_range_notifier_ops *ops;
+ struct hlist_node deferred_item;
+ unsigned long invalidate_seq;
+ struct mm_struct *mm;
+};
+
#ifdef CONFIG_MMU_NOTIFIER
#ifdef CONFIG_LOCKDEP
@@ -263,6 +289,78 @@ extern int __mmu_notifier_register(struct mmu_notifier *mn,
struct mm_struct *mm);
extern void mmu_notifier_unregister(struct mmu_notifier *mn,
struct mm_struct *mm);
+
+unsigned long mmu_range_read_begin(struct mmu_range_notifier *mrn);
+int mmu_range_notifier_insert(struct mmu_range_notifier *mrn,
+ unsig...
2019 Nov 12
0
[PATCH v3 02/14] mm/mmu_notifier: add an interval tree notifier
...t mmu_interval_notifier {
+ struct interval_tree_node interval_tree;
+ const struct mmu_interval_notifier_ops *ops;
+ struct mm_struct *mm;
+ struct hlist_node deferred_item;
+ unsigned long invalidate_seq;
+};
+
#ifdef CONFIG_MMU_NOTIFIER
#ifdef CONFIG_LOCKDEP
@@ -263,6 +289,81 @@ extern int __mmu_notifier_register(struct mmu_notifier *mn,
struct mm_struct *mm);
extern void mmu_notifier_unregister(struct mmu_notifier *mn,
struct mm_struct *mm);
+
+unsigned long mmu_interval_read_begin(struct mmu_interval_notifier *mni);
+int mmu_interval_notifier_insert(struct mmu_interval_notifier *mni,
+...
2019 Oct 29
1
[PATCH v2 02/15] mm/mmu_notifier: add an interval tree notifier
...++++++++--
> 3 files changed, 607 insertions(+), 25 deletions(-)
>
[snip]
> diff --git a/mm/mmu_notifier.c b/mm/mmu_notifier.c
> index 367670cfd02b7b..d02d3c8c223eb7 100644
> --- a/mm/mmu_notifier.c
> +++ b/mm/mmu_notifier.c
[snip]
> * because mm->mm_users > 0 during mmu_notifier_register and exit_mmap
> @@ -52,17 +286,24 @@ struct mmu_notifier_mm {
> * can't go away from under us as exit_mmap holds an mm_count pin
> * itself.
> */
> -void __mmu_notifier_release(struct mm_struct *mm)
> +static void mn_hlist_release(struct mmu_notifier_mm *mmn_mm,
>...
2019 Nov 05
1
[PATCH v2 01/15] mm/mmu_notifier: define the header pre-processor parts even if disabled
...mu_notifier_mm {
> + /* all mmu notifiers registered in this mm are queued in this list */
> + struct hlist_head list;
> + /* to serialize the list modifications and hlist_unhashed */
> + spinlock_t lock;
> +};
> +
> /*
> * This function can't run concurrently against mmu_notifier_register
> * because mm->mm_users > 0 during mmu_notifier_register and exit_mmap
>
2019 Aug 07
11
[PATCH V3 00/10] Fixes for metadata accelreation
Hi all:
This series try to fix several issues introduced by meta data
accelreation series. Please review.
Changes from V2:
- use seqlck helper to synchronize MMU notifier with vhost worker
Changes from V1:
- try not use RCU to syncrhonize MMU notifier with vhost worker
- set dirty pages after no readers
- return -EAGAIN only when we find the range is overlapped with
metadata
Jason Wang (9):
2019 Aug 09
11
[PATCH V5 0/9] Fixes for vhost metadata acceleration
Hi all:
This series try to fix several issues introduced by meta data
accelreation series. Please review.
Changes from V4:
- switch to use spinlock synchronize MMU notifier with accessors
Changes from V3:
- remove the unnecessary patch
Changes from V2:
- use seqlck helper to synchronize MMU notifier with vhost worker
Changes from V1:
- try not use RCU to syncrhonize MMU notifier with vhost
2019 Aug 09
11
[PATCH V5 0/9] Fixes for vhost metadata acceleration
Hi all:
This series try to fix several issues introduced by meta data
accelreation series. Please review.
Changes from V4:
- switch to use spinlock synchronize MMU notifier with accessors
Changes from V3:
- remove the unnecessary patch
Changes from V2:
- use seqlck helper to synchronize MMU notifier with vhost worker
Changes from V1:
- try not use RCU to syncrhonize MMU notifier with vhost
2019 Aug 07
12
[PATCH V4 0/9] Fixes for metadata accelreation
Hi all:
This series try to fix several issues introduced by meta data
accelreation series. Please review.
Changes from V3:
- remove the unnecessary patch
Changes from V2:
- use seqlck helper to synchronize MMU notifier with vhost worker
Changes from V1:
- try not use RCU to syncrhonize MMU notifier with vhost worker
- set dirty pages after no readers
- return -EAGAIN only when we find the
2019 Aug 07
12
[PATCH V4 0/9] Fixes for metadata accelreation
Hi all:
This series try to fix several issues introduced by meta data
accelreation series. Please review.
Changes from V3:
- remove the unnecessary patch
Changes from V2:
- use seqlck helper to synchronize MMU notifier with vhost worker
Changes from V1:
- try not use RCU to syncrhonize MMU notifier with vhost worker
- set dirty pages after no readers
- return -EAGAIN only when we find the
2019 Jan 04
1
[RFC PATCH V3 5/5] vhost: access vq metadata through kernel virtual address
.../* Caller should have device mutex */
> long vhost_dev_set_owner(struct vhost_dev *dev)
> {
> @@ -541,7 +611,14 @@ long vhost_dev_set_owner(struct vhost_dev *dev)
> if (err)
> goto err_cgroup;
>
> + dev->mmu_notifier.ops = &vhost_mmu_notifier_ops;
> + err = mmu_notifier_register(&dev->mmu_notifier, dev->mm);
> + if (err)
> + goto err_mmu_notifier;
> +
> return 0;
> +err_mmu_notifier:
> + vhost_dev_free_iovecs(dev);
> err_cgroup:
> kthread_stop(worker);
> dev->worker = NULL;
> @@ -632,6 +709,72 @@ static void vhost_clear_ms...
2019 Oct 29
0
[PATCH v2 02/15] mm/mmu_notifier: add an interval tree notifier
On Tue, Oct 29, 2019 at 10:04:45PM +0000, Kuehling, Felix wrote:
> > * because mm->mm_users > 0 during mmu_notifier_register and exit_mmap
> > @@ -52,17 +286,24 @@ struct mmu_notifier_mm {
> > * can't go away from under us as exit_mmap holds an mm_count pin
> > * itself.
> > */
> > -void __mmu_notifier_release(struct mm_struct *mm)
> > +static void mn_hlist_release(struct...
2019 Sep 06
1
[PATCH 1/2] Revert "vhost: access vq metadata through kernel virtual address"
...t; vhost_vq_reset(dev, vq);
> if (vq->handle_kick)
> vhost_poll_init(&vq->poll, vq->handle_kick,
> @@ -725,18 +564,7 @@ long vhost_dev_set_owner(struct vhost_dev *dev)
> if (err)
> goto err_cgroup;
>
> -#if VHOST_ARCH_CAN_ACCEL_UACCESS
> - err = mmu_notifier_register(&dev->mmu_notifier, dev->mm);
> - if (err)
> - goto err_mmu_notifier;
> -#endif
> -
> return 0;
> -
> -#if VHOST_ARCH_CAN_ACCEL_UACCESS
> -err_mmu_notifier:
> - vhost_dev_free_iovecs(dev);
> -#endif
> err_cgroup:
> kthread_stop(worker);
> dev...
2018 Dec 29
0
[RFC PATCH V3 5/5] vhost: access vq metadata through kernel virtual address
...u_notifier_invalidate_range_start,
+};
+
/* Caller should have device mutex */
long vhost_dev_set_owner(struct vhost_dev *dev)
{
@@ -541,7 +611,14 @@ long vhost_dev_set_owner(struct vhost_dev *dev)
if (err)
goto err_cgroup;
+ dev->mmu_notifier.ops = &vhost_mmu_notifier_ops;
+ err = mmu_notifier_register(&dev->mmu_notifier, dev->mm);
+ if (err)
+ goto err_mmu_notifier;
+
return 0;
+err_mmu_notifier:
+ vhost_dev_free_iovecs(dev);
err_cgroup:
kthread_stop(worker);
dev->worker = NULL;
@@ -632,6 +709,72 @@ static void vhost_clear_msg(struct vhost_dev *dev)
spin_unlock(&dev-&g...
2019 Jun 06
2
[PATCH] vhost: Don't use defined in VHOST_ARCH_CAN_ACCEL_UACCESS definition
...t;iotlb_lock);
-#if VHOST_ARCH_CAN_ACCEL_UACCESS
+#ifdef VHOST_ARCH_CAN_ACCEL_UACCESS
vhost_init_maps(dev);
#endif
@@ -726,7 +726,7 @@ long vhost_dev_set_owner(struct vhost_dev *dev)
if (err)
goto err_cgroup;
-#if VHOST_ARCH_CAN_ACCEL_UACCESS
+#ifdef VHOST_ARCH_CAN_ACCEL_UACCESS
err = mmu_notifier_register(&dev->mmu_notifier, dev->mm);
if (err)
goto err_mmu_notifier;
@@ -734,7 +734,7 @@ long vhost_dev_set_owner(struct vhost_dev *dev)
return 0;
-#if VHOST_ARCH_CAN_ACCEL_UACCESS
+#ifdef VHOST_ARCH_CAN_ACCEL_UACCESS
err_mmu_notifier:
vhost_dev_free_iovecs(dev);
#endif
@@ -828,7...
2019 Jun 06
2
[PATCH] vhost: Don't use defined in VHOST_ARCH_CAN_ACCEL_UACCESS definition
...t;iotlb_lock);
-#if VHOST_ARCH_CAN_ACCEL_UACCESS
+#ifdef VHOST_ARCH_CAN_ACCEL_UACCESS
vhost_init_maps(dev);
#endif
@@ -726,7 +726,7 @@ long vhost_dev_set_owner(struct vhost_dev *dev)
if (err)
goto err_cgroup;
-#if VHOST_ARCH_CAN_ACCEL_UACCESS
+#ifdef VHOST_ARCH_CAN_ACCEL_UACCESS
err = mmu_notifier_register(&dev->mmu_notifier, dev->mm);
if (err)
goto err_mmu_notifier;
@@ -734,7 +734,7 @@ long vhost_dev_set_owner(struct vhost_dev *dev)
return 0;
-#if VHOST_ARCH_CAN_ACCEL_UACCESS
+#ifdef VHOST_ARCH_CAN_ACCEL_UACCESS
err_mmu_notifier:
vhost_dev_free_iovecs(dev);
#endif
@@ -828,7...