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SubjectRe: [PATCH v2 1/2] vfio : resume notifier
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On 2016年07月19日 15:32, Zhou Jie wrote:
> From: root <root@root.com>

Pls add your username and email by using git config --global user.name /
user.email
to update your git config, and git send-email again.

Thanks,
Chen

>
> ---
> drivers/vfio/pci/vfio_pci.c | 28 +++++++++++++++++++++++++++-
> drivers/vfio/pci/vfio_pci_intrs.c | 18 ++++++++++++++++++
> drivers/vfio/pci/vfio_pci_private.h | 1 +
> include/uapi/linux/vfio.h | 1 +
> 4 files changed, 47 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/vfio/pci/vfio_pci.c b/drivers/vfio/pci/vfio_pci.c
> index 188b1ff..2d12b03 100644
> --- a/drivers/vfio/pci/vfio_pci.c
> +++ b/drivers/vfio/pci/vfio_pci.c
> @@ -363,7 +363,8 @@ static int vfio_pci_get_irq_count(struct vfio_pci_device *vdev, int irq_type)
>
> return (flags & PCI_MSIX_FLAGS_QSIZE) + 1;
> }
> - } else if (irq_type == VFIO_PCI_ERR_IRQ_INDEX) {
> + } else if (irq_type == VFIO_PCI_ERR_IRQ_INDEX ||
> + irq_type == VFIO_PCI_RESUME_IRQ_INDEX) {
> if (pci_is_pcie(vdev->pdev))
> return 1;
> } else if (irq_type == VFIO_PCI_REQ_IRQ_INDEX) {
> @@ -731,6 +732,7 @@ static long vfio_pci_ioctl(void *device_data,
> case VFIO_PCI_REQ_IRQ_INDEX:
> break;
> case VFIO_PCI_ERR_IRQ_INDEX:
> + case VFIO_PCI_RESUME_IRQ_INDEX:
> if (pci_is_pcie(vdev->pdev))
> break;
> /* pass thru to return error */
> @@ -1234,8 +1236,32 @@ static pci_ers_result_t vfio_pci_aer_err_detected(struct pci_dev *pdev,
> return PCI_ERS_RESULT_CAN_RECOVER;
> }
>
> +static void vfio_pci_aer_resume(struct pci_dev *pdev)
> +{
> + struct vfio_pci_device *vdev;
> + struct vfio_device *device;
> +
> + device = vfio_device_get_from_dev(&pdev->dev);
> + if (device == NULL)
> + return;
> +
> + vdev = vfio_device_data(device);
> + if (vdev == NULL) {
> + vfio_device_put(device);
> + return;
> + }
> +
> + mutex_lock(&vdev->igate);
> + if (vdev->resume_trigger)
> + eventfd_signal(vdev->resume_trigger, 1);
> +
> + mutex_unlock(&vdev->igate);
> + vfio_device_put(device);
> +}
> +
> static const struct pci_error_handlers vfio_err_handlers = {
> .error_detected = vfio_pci_aer_err_detected,
> + .resume = vfio_pci_aer_resume,
> };
>
> static struct pci_driver vfio_pci_driver = {
> diff --git a/drivers/vfio/pci/vfio_pci_intrs.c b/drivers/vfio/pci/vfio_pci_intrs.c
> index 15ecfc9..3a01a62 100644
> --- a/drivers/vfio/pci/vfio_pci_intrs.c
> +++ b/drivers/vfio/pci/vfio_pci_intrs.c
> @@ -617,6 +617,16 @@ static int vfio_pci_set_err_trigger(struct vfio_pci_device *vdev,
> return vfio_pci_set_ctx_trigger_single(&vdev->err_trigger, flags, data);
> }
>
> +static int vfio_pci_set_resume_trigger(struct vfio_pci_device *vdev,
> + unsigned index, unsigned start,
> + unsigned count, uint32_t flags, void *data)
> +{
> + if (index != VFIO_PCI_RESUME_IRQ_INDEX)
> + return -EINVAL;
> +
> + return vfio_pci_set_ctx_trigger_single(&vdev->resume_trigger, flags, data);
> +}
> +
> static int vfio_pci_set_req_trigger(struct vfio_pci_device *vdev,
> unsigned index, unsigned start,
> unsigned count, uint32_t flags, void *data)
> @@ -676,6 +686,14 @@ int vfio_pci_set_irqs_ioctl(struct vfio_pci_device *vdev, uint32_t flags,
> break;
> }
> break;
> + case VFIO_PCI_RESUME_IRQ_INDEX:
> + switch (flags & VFIO_IRQ_SET_ACTION_TYPE_MASK) {
> + case VFIO_IRQ_SET_ACTION_TRIGGER:
> + if (pci_is_pcie(vdev->pdev))
> + func = vfio_pci_set_resume_trigger;
> + break;
> + }
> + break;
> }
>
> if (!func)
> diff --git a/drivers/vfio/pci/vfio_pci_private.h b/drivers/vfio/pci/vfio_pci_private.h
> index 016c14a..80d4ddd 100644
> --- a/drivers/vfio/pci/vfio_pci_private.h
> +++ b/drivers/vfio/pci/vfio_pci_private.h
> @@ -88,6 +88,7 @@ struct vfio_pci_device {
> int refcnt;
> struct eventfd_ctx *err_trigger;
> struct eventfd_ctx *req_trigger;
> + struct eventfd_ctx *resume_trigger;
> };
>
> #define is_intx(vdev) (vdev->irq_type == VFIO_PCI_INTX_IRQ_INDEX)
> diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h
> index 255a211..34ab138 100644
> --- a/include/uapi/linux/vfio.h
> +++ b/include/uapi/linux/vfio.h
> @@ -433,6 +433,7 @@ enum {
> VFIO_PCI_MSIX_IRQ_INDEX,
> VFIO_PCI_ERR_IRQ_INDEX,
> VFIO_PCI_REQ_IRQ_INDEX,
> + VFIO_PCI_RESUME_IRQ_INDEX,
> VFIO_PCI_NUM_IRQS
> };
>

--
Sincerely,
Chen Fan

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