On Wed, Apr 06, 2022 at 04:35:33PM +0800, Jason Wang wrote:
> Hi All:
>
> This is a rework on the IRQ hardening for virtio which is done
> previously by the following commits are reverted:
>
> 9e35276a5344 ("virtio_pci: harden MSI-X interrupts")
> 080cd7c3ac87 ("virtio-pci: harden INTX interrupts")
>
> The reason is that it depends on the IRQF_NO_AUTOEN which may conflict
> with the assumption of the affinity managed IRQ that is used by some
> virtio drivers. And what's more, it is only done for virtio-pci but
> not other transports.
>
> In this rework, I try to implement a general virtio solution which
> borrows the idea of the INTX hardening by introducing a boolean for
> virtqueue callback enabling and toggle it in virtio_device_ready()
> and virtio_reset_device(). Then vring_interrupt() can simply check and
> return early if the driver is not ready.
All of a sudden all patches are having a wrong mime type.
It is application/octet-stream; should be text/plain
Pls fix and repost, thanks!
> Please review.
>
> Changes since v1:
>
> - Use transport specific irq synchronization method when possible
> - Drop the module parameter and enable the hardening unconditonally
> - Tweak the barrier/ordering facilities used in the code
> - Reanme irq_soft_enabled to driver_ready
> - Avoid unnecssary IRQ synchornization (e.g during boot)
>
> Jason Wang (4):
> virtio: use virtio_reset_device() when possible
> virtio: introduce config op to synchronize vring callbacks
> virtio-pci: implement synchronize_vqs()
> virtio: harden vring IRQ
>
> Stefano Garzarella (1):
> virtio: use virtio_device_ready() in virtio_device_restore()
>
> drivers/virtio/virtio.c | 20 ++++++++++++++++----
> drivers/virtio/virtio_pci_common.c | 14 ++++++++++++++
> drivers/virtio/virtio_pci_common.h | 2 ++
> drivers/virtio/virtio_pci_legacy.c | 1 +
> drivers/virtio/virtio_pci_modern.c | 2 ++
> drivers/virtio/virtio_ring.c | 9 ++++++++-
> include/linux/virtio.h | 2 ++
> include/linux/virtio_config.h | 24 ++++++++++++++++++++++++
> 8 files changed, 69 insertions(+), 5 deletions(-)
>
> --
> 2.25.1
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