search for: vdpa_notification_area

...> } > > +static vm_fault_t vhost_vdpa_fault(struct vm_fault *vmf) > +{ > + struct vhost_vdpa *v = vmf->vma->vm_file->private_data; > + struct vdpa_device *vdpa = v->vdpa; > + const struct vdpa_config_ops *ops = vdpa->config; > + struct vdpa_notification_area notify; > + struct vm_area_struct *vma = vmf->vma; > + u16 index = vma->vm_pgoff; > + > + notify = ops->get_vq_notification(vdpa, index); > + > + vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); > + if (remap_pfn_range(vma, v...

...pa.c index 7580e34f76c10..a54b60d6623f0 100644 --- a/drivers/vhost/vdpa.c +++ b/drivers/vhost/vdpa.c @@ -818,7 +818,7 @@ static int vhost_vdpa_mmap(struct file *file, struct vm_area_struct *vma) struct vdpa_device *vdpa = v->vdpa; const struct vdpa_config_ops *ops = vdpa->config; struct vdpa_notification_area notify; - int index = vma->vm_pgoff; + unsigned long index = vma->vm_pgoff; if (vma->vm_end - vma->vm_start != PAGE_SIZE) return -EINVAL; -- 2.26.2

Hi all: This series introduce basic functionality of doorbell mapping support for vhost-vDPA. Userspace program may use mmap() to map a the doorbell of a specific virtqueue into its address space. This is help to reudce the syscall or vmexit overhead. A new vdpa_config_ops was introduced to report the location of the doorbell, vhost_vdpa may then choose to map the doorbell when: - The doorbell

Hi all: This series introduce basic functionality of doorbell mapping support for vhost-vDPA. Userspace program may use mmap() to map a the doorbell of a specific virtqueue into its address space. This is help to reudce the syscall or vmexit overhead. A new vdpa_config_ops was introduced to report the location of the doorbell, vhost_vdpa may then choose to map the doorbell when: - The doorbell

..._release(struct inode *inode, struct file *filep) return 0; } +static vm_fault_t vhost_vdpa_fault(struct vm_fault *vmf) +{ + struct vhost_vdpa *v = vmf->vma->vm_file->private_data; + struct vdpa_device *vdpa = v->vdpa; + const struct vdpa_config_ops *ops = vdpa->config; + struct vdpa_notification_area notify; + struct vm_area_struct *vma = vmf->vma; + u16 index = vma->vm_pgoff; + + notify = ops->get_vq_notification(vdpa, index); + + vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); + if (remap_pfn_range(vma, vmf->address & PAGE_MASK, + notify.addr >> PAGE...

...drivers/vhost/vdpa.c 742 743 static vm_fault_t vhost_vdpa_fault(struct vm_fault *vmf) 744 { 745 struct vhost_vdpa *v = vmf->vma->vm_file->private_data; 746 struct vdpa_device *vdpa = v->vdpa; 747 const struct vdpa_config_ops *ops = vdpa->config; 748 struct vdpa_notification_area notify; 749 struct vm_area_struct *vma = vmf->vma; 750 u16 index = vma->vm_pgoff; 751 752 notify = ops->get_vq_notification(vdpa, index); 753 > 754 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); 755 if (remap_pfn_range(vma, vmf->address &...

...drivers/vhost/vdpa.c 742 743 static vm_fault_t vhost_vdpa_fault(struct vm_fault *vmf) 744 { 745 struct vhost_vdpa *v = vmf->vma->vm_file->private_data; 746 struct vdpa_device *vdpa = v->vdpa; 747 const struct vdpa_config_ops *ops = vdpa->config; 748 struct vdpa_notification_area notify; 749 struct vm_area_struct *vma = vmf->vma; 750 u16 index = vma->vm_pgoff; 751 752 notify = ops->get_vq_notification(vdpa, index); 753 > 754 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); 755 if (remap_pfn_range(vma, vmf->address &...

...gt;> ? +static vm_fault_t vhost_vdpa_fault(struct vm_fault *vmf) >> +{ >> +??? struct vhost_vdpa *v = vmf->vma->vm_file->private_data; >> +??? struct vdpa_device *vdpa = v->vdpa; >> +??? const struct vdpa_config_ops *ops = vdpa->config; >> +??? struct vdpa_notification_area notify; >> +??? struct vm_area_struct *vma = vmf->vma; >> +??? u16 index = vma->vm_pgoff; >> + >> +??? notify = ops->get_vq_notification(vdpa, index); >> + >> +??? vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); >> +??? if (remap_pfn...

...ult_t vhost_vdpa_fault(struct vm_fault *vmf) >> 744 { >> 745 struct vhost_vdpa *v = vmf->vma->vm_file->private_data; >> 746 struct vdpa_device *vdpa = v->vdpa; >> 747 const struct vdpa_config_ops *ops = vdpa->config; >> 748 struct vdpa_notification_area notify; >> 749 struct vm_area_struct *vma = vmf->vma; >> 750 u16 index = vma->vm_pgoff; >> 751 >> 752 notify = ops->get_vq_notification(vdpa, index); >> 753 >> > 754 vma->vm_page_prot = pgprot_noncached(vma->vm_page_p...

...ult_t vhost_vdpa_fault(struct vm_fault *vmf) >> 744 { >> 745 struct vhost_vdpa *v = vmf->vma->vm_file->private_data; >> 746 struct vdpa_device *vdpa = v->vdpa; >> 747 const struct vdpa_config_ops *ops = vdpa->config; >> 748 struct vdpa_notification_area notify; >> 749 struct vm_area_struct *vma = vmf->vma; >> 750 u16 index = vma->vm_pgoff; >> 751 >> 752 notify = ops->get_vq_notification(vdpa, index); >> 753 >> > 754 vma->vm_page_prot = pgprot_noncached(vma->vm_page_p...

...u16 qid, pgprot_t prot) > +{ > + /* > + * We use normal RAM pages to emulate the vq notification area, so > + * just keep the pgprot as it mmaped. > + */ > + return prot; > +} > + > +static struct vdpa_notification_area > +vdpasim_get_vq_notification(struct vdpa_device *vdpa, u16 qid) > +{ > + struct vdpasim *vdpasim = vdpa_to_sim(vdpa); > + struct vdpa_notification_area notify; > + > + notify.addr = virt_to_phys((void *)vdpasim->notify); > + notify.size = PAGE_SIZE;...

...>>>> 744 { >>>> 745 struct vhost_vdpa *v = vmf->vma->vm_file->private_data; >>>> 746 struct vdpa_device *vdpa = v->vdpa; >>>> 747 const struct vdpa_config_ops *ops = vdpa->config; >>>> 748 struct vdpa_notification_area notify; >>>> 749 struct vm_area_struct *vma = vmf->vma; >>>> 750 u16 index = vma->vm_pgoff; >>>> 751 >>>> 752 notify = ops->get_vq_notification(vdpa, index); >>>> 753 >>>> > 754 vma...

...>>>> 744 { >>>> 745 struct vhost_vdpa *v = vmf->vma->vm_file->private_data; >>>> 746 struct vdpa_device *vdpa = v->vdpa; >>>> 747 const struct vdpa_config_ops *ops = vdpa->config; >>>> 748 struct vdpa_notification_area notify; >>>> 749 struct vm_area_struct *vma = vmf->vma; >>>> 750 u16 index = vma->vm_pgoff; >>>> 751 >>>> 752 notify = ops->get_vq_notification(vdpa, index); >>>> 753 >>>> > 754 vma...

...; err = dev_set_name(&vdev->dev, "vdpa%u", vdev->index); > if (err) > diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h > index 239db794357c..29b8296f1414 100644 > --- a/include/linux/vdpa.h > +++ b/include/linux/vdpa.h > @@ -33,12 +33,14 @@ struct vdpa_notification_area { > * @dma_dev: the actual device that is performing DMA > * @config: the configuration ops for this device. > * @index: device index > + * @features_valid: were features initialized? for legacy guests > */ > struct vdpa_device { > struct device dev; > st...

...; err = dev_set_name(&vdev->dev, "vdpa%u", vdev->index); > if (err) > diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h > index 239db794357c..29b8296f1414 100644 > --- a/include/linux/vdpa.h > +++ b/include/linux/vdpa.h > @@ -33,12 +33,14 @@ struct vdpa_notification_area { > * @dma_dev: the actual device that is performing DMA > * @config: the configuration ops for this device. > * @index: device index > + * @features_valid: were features initialized? for legacy guests > */ > struct vdpa_device { > struct device dev; > st...

...vp_vdpa *vp_vdpa = vdpa_to_vp(vdpa); >> + >> + return vp_ioread16(&vp_vdpa->common->queue_size); >> +} >> + >> +static u64 vp_vdpa_get_vq_state(struct vdpa_device *vdpa, u16 qid) >> +{ >> + return 0; >> +} >> + >> +static struct vdpa_notification_area >> +vp_vdpa_get_vq_notification(struct vdpa_device *vdpa, u16 qid) >> +{ >> + struct vp_vdpa *vp_vdpa = vdpa_to_vp(vdpa); >> + struct vdpa_notification_area notify; >> + >> + notify.addr = vp_vdpa->vring[qid].notify_pa; >> + notify.size = vp_vdpa->not...

...vp_vdpa *vp_vdpa = vdpa_to_vp(vdpa); >> + >> + return vp_ioread16(&vp_vdpa->common->queue_size); >> +} >> + >> +static u64 vp_vdpa_get_vq_state(struct vdpa_device *vdpa, u16 qid) >> +{ >> + return 0; >> +} >> + >> +static struct vdpa_notification_area >> +vp_vdpa_get_vq_notification(struct vdpa_device *vdpa, u16 qid) >> +{ >> + struct vp_vdpa *vp_vdpa = vdpa_to_vp(vdpa); >> + struct vdpa_notification_area notify; >> + >> + notify.addr = vp_vdpa->vring[qid].notify_pa; >> + notify.size = vp_vdpa->not...

...IT(VQ_STATE_NOT_READY); > state->avail_index = vrh->last_avail_idx; > } > > diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h > index 7b088bebffe8..bcefa30a3b2f 100644 > --- a/include/linux/vdpa.h > +++ b/include/linux/vdpa.h > @@ -27,12 +27,21 @@ struct vdpa_notification_area { > resource_size_t size; > }; > > +/** > + * Bitmask describing the status of the vq > + */ > +enum { > + VQ_STATE_NOT_READY = 0, > +}; > + > /** > * vDPA vq_state definition > * @avail_index: available index > + * @state: returned status f...

...since the function will return a u32. Thanks > * @get_vq_align: Get the virtqueue align requirement > * for the device > * @vdev: vdpa device > @@ -178,6 +183,7 @@ struct vdpa_config_ops { > u64 (*get_vq_state)(struct vdpa_device *vdev, u16 idx); > struct vdpa_notification_area > (*get_vq_notification)(struct vdpa_device *vdev, u16 idx); > + u32 (*get_vq_irq)(struct vdpa_device *vdv, u16 idx); > > /* Device ops */ > u32 (*get_vq_align)(struct vdpa_device *vdev);

...dev->features_valid = false; err = dev_set_name(&vdev->dev, "vdpa%u", vdev->index); if (err) diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h index 239db794357c..29b8296f1414 100644 --- a/include/linux/vdpa.h +++ b/include/linux/vdpa.h @@ -33,12 +33,14 @@ struct vdpa_notification_area { * @dma_dev: the actual device that is performing DMA * @config: the configuration ops for this device. * @index: device index + * @features_valid: were features initialized? for legacy guests */ struct vdpa_device { struct device dev; struct device *dma_dev; const struct vdpa_confi...