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author | Linus Torvalds <torvalds@linux-foundation.org> | 2024-01-19 01:44:03 +0100 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2024-01-19 01:44:03 +0100 |
commit | 0b7359ccddaaa844044c62000734f0cb92ab6310 (patch) | |
tree | f37be5ed54ec934208fbcb0d2af81c81d364d6c6 /drivers/virtio | |
parent | Merge tag 'hwmon-for-v6.8-p2' of git://git.kernel.org/pub/scm/linux/kernel/gi... (diff) | |
parent | vdpa/mlx5: Add mkey leak detection (diff) | |
download | linux-0b7359ccddaaa844044c62000734f0cb92ab6310.tar.xz linux-0b7359ccddaaa844044c62000734f0cb92ab6310.zip |
Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
Pull virtio updates from Michael Tsirkin:
- vdpa/mlx5: support for resumable vqs
- virtio_scsi: mq_poll support
- 3virtio_pmem: support SHMEM_REGION
- virtio_balloon: stay awake while adjusting balloon
- virtio: support for no-reset virtio PCI PM
- Fixes, cleanups
* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
vdpa/mlx5: Add mkey leak detection
vdpa/mlx5: Introduce reference counting to mrs
vdpa/mlx5: Use vq suspend/resume during .set_map
vdpa/mlx5: Mark vq state for modification in hw vq
vdpa/mlx5: Mark vq addrs for modification in hw vq
vdpa/mlx5: Introduce per vq and device resume
vdpa/mlx5: Allow modifying multiple vq fields in one modify command
vdpa/mlx5: Expose resumable vq capability
vdpa: Block vq property changes in DRIVER_OK
vdpa: Track device suspended state
scsi: virtio_scsi: Add mq_poll support
virtio_pmem: support feature SHMEM_REGION
virtio_balloon: stay awake while adjusting balloon
vdpa: Remove usage of the deprecated ida_simple_xx() API
virtio: Add support for no-reset virtio PCI PM
virtio_net: fix missing dma unmap for resize
vhost-vdpa: account iommu allocations
vdpa: Fix an error handling path in eni_vdpa_probe()
Diffstat (limited to 'drivers/virtio')
-rw-r--r-- | drivers/virtio/virtio_balloon.c | 57 | ||||
-rw-r--r-- | drivers/virtio/virtio_pci_common.c | 34 |
2 files changed, 80 insertions, 11 deletions
diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c index 59cdc0292dce..1f5b3dd31fcf 100644 --- a/drivers/virtio/virtio_balloon.c +++ b/drivers/virtio/virtio_balloon.c @@ -119,6 +119,11 @@ struct virtio_balloon { /* Free page reporting device */ struct virtqueue *reporting_vq; struct page_reporting_dev_info pr_dev_info; + + /* State for keeping the wakeup_source active while adjusting the balloon */ + spinlock_t adjustment_lock; + bool adjustment_signal_pending; + bool adjustment_in_progress; }; static const struct virtio_device_id id_table[] = { @@ -437,6 +442,31 @@ static void virtio_balloon_queue_free_page_work(struct virtio_balloon *vb) queue_work(vb->balloon_wq, &vb->report_free_page_work); } +static void start_update_balloon_size(struct virtio_balloon *vb) +{ + unsigned long flags; + + spin_lock_irqsave(&vb->adjustment_lock, flags); + vb->adjustment_signal_pending = true; + if (!vb->adjustment_in_progress) { + vb->adjustment_in_progress = true; + pm_stay_awake(vb->vdev->dev.parent); + } + spin_unlock_irqrestore(&vb->adjustment_lock, flags); + + queue_work(system_freezable_wq, &vb->update_balloon_size_work); +} + +static void end_update_balloon_size(struct virtio_balloon *vb) +{ + spin_lock_irq(&vb->adjustment_lock); + if (!vb->adjustment_signal_pending && vb->adjustment_in_progress) { + vb->adjustment_in_progress = false; + pm_relax(vb->vdev->dev.parent); + } + spin_unlock_irq(&vb->adjustment_lock); +} + static void virtballoon_changed(struct virtio_device *vdev) { struct virtio_balloon *vb = vdev->priv; @@ -444,8 +474,7 @@ static void virtballoon_changed(struct virtio_device *vdev) spin_lock_irqsave(&vb->stop_update_lock, flags); if (!vb->stop_update) { - queue_work(system_freezable_wq, - &vb->update_balloon_size_work); + start_update_balloon_size(vb); virtio_balloon_queue_free_page_work(vb); } spin_unlock_irqrestore(&vb->stop_update_lock, flags); @@ -476,19 +505,25 @@ static void update_balloon_size_func(struct work_struct *work) vb = container_of(work, struct virtio_balloon, update_balloon_size_work); - diff = towards_target(vb); - if (!diff) - return; + spin_lock_irq(&vb->adjustment_lock); + vb->adjustment_signal_pending = false; + spin_unlock_irq(&vb->adjustment_lock); - if (diff > 0) - diff -= fill_balloon(vb, diff); - else - diff += leak_balloon(vb, -diff); - update_balloon_size(vb); + diff = towards_target(vb); + + if (diff) { + if (diff > 0) + diff -= fill_balloon(vb, diff); + else + diff += leak_balloon(vb, -diff); + update_balloon_size(vb); + } if (diff) queue_work(system_freezable_wq, work); + else + end_update_balloon_size(vb); } static int init_vqs(struct virtio_balloon *vb) @@ -992,6 +1027,8 @@ static int virtballoon_probe(struct virtio_device *vdev) goto out_unregister_oom; } + spin_lock_init(&vb->adjustment_lock); + virtio_device_ready(vdev); if (towards_target(vb)) diff --git a/drivers/virtio/virtio_pci_common.c b/drivers/virtio/virtio_pci_common.c index 9f93330fc2cc..b655fccaf773 100644 --- a/drivers/virtio/virtio_pci_common.c +++ b/drivers/virtio/virtio_pci_common.c @@ -495,8 +495,40 @@ static int virtio_pci_restore(struct device *dev) return virtio_device_restore(&vp_dev->vdev); } +static bool vp_supports_pm_no_reset(struct device *dev) +{ + struct pci_dev *pci_dev = to_pci_dev(dev); + u16 pmcsr; + + if (!pci_dev->pm_cap) + return false; + + pci_read_config_word(pci_dev, pci_dev->pm_cap + PCI_PM_CTRL, &pmcsr); + if (PCI_POSSIBLE_ERROR(pmcsr)) { + dev_err(dev, "Unable to query pmcsr"); + return false; + } + + return pmcsr & PCI_PM_CTRL_NO_SOFT_RESET; +} + +static int virtio_pci_suspend(struct device *dev) +{ + return vp_supports_pm_no_reset(dev) ? 0 : virtio_pci_freeze(dev); +} + +static int virtio_pci_resume(struct device *dev) +{ + return vp_supports_pm_no_reset(dev) ? 0 : virtio_pci_restore(dev); +} + static const struct dev_pm_ops virtio_pci_pm_ops = { - SET_SYSTEM_SLEEP_PM_OPS(virtio_pci_freeze, virtio_pci_restore) + .suspend = virtio_pci_suspend, + .resume = virtio_pci_resume, + .freeze = virtio_pci_freeze, + .thaw = virtio_pci_restore, + .poweroff = virtio_pci_freeze, + .restore = virtio_pci_restore, }; #endif |