KVM Archive on lore.kernel.org
 help / color / Atom feed
From: "Liu, Yi L" <yi.l.liu@intel.com>
To: Lu Baolu <baolu.lu@linux.intel.com>,
	Joerg Roedel <joro@8bytes.org>,
	"Alex Williamson" <alex.williamson@redhat.com>
Cc: Robin Murphy <robin.murphy@arm.com>,
	Jean-Philippe Brucker <jean-philippe@linaro.org>,
	Cornelia Huck <cohuck@redhat.com>,
	"Tian, Kevin" <kevin.tian@intel.com>,
	"Raj, Ashok" <ashok.raj@intel.com>,
	"Jiang, Dave" <dave.jiang@intel.com>,
	"iommu@lists.linux-foundation.org"
	<iommu@lists.linux-foundation.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"kvm@vger.kernel.org" <kvm@vger.kernel.org>
Subject: RE: [PATCH v3 4/4] vfio/type1: Use iommu_aux_at(de)tach_group() APIs
Date: Thu, 30 Jul 2020 09:36:58 +0000
Message-ID: <DM5PR11MB14351AE909E031B578EA3170C3710@DM5PR11MB1435.namprd11.prod.outlook.com> (raw)
In-Reply-To: <20200714055703.5510-5-baolu.lu@linux.intel.com>

> From: Lu Baolu <baolu.lu@linux.intel.com>
> Sent: Tuesday, July 14, 2020 1:57 PM
> 
> Replace iommu_aux_at(de)tach_device() with iommu_aux_at(de)tach_group().
> It also saves the IOMMU_DEV_FEAT_AUX-capable physcail device in the vfio_group
> data structure so that it could be reused in other places.
> 
> Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
> ---
>  drivers/vfio/vfio_iommu_type1.c | 44 ++++++---------------------------
>  1 file changed, 7 insertions(+), 37 deletions(-)
> 
> diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c
> index 5e556ac9102a..f8812e68de77 100644
> --- a/drivers/vfio/vfio_iommu_type1.c
> +++ b/drivers/vfio/vfio_iommu_type1.c
> @@ -100,6 +100,7 @@ struct vfio_dma {
>  struct vfio_group {
>  	struct iommu_group	*iommu_group;
>  	struct list_head	next;
> +	struct device		*iommu_device;

I know mdev group has only one device, so such a group has a single
iommu_device. But I guess may be helpful to add a comment here or in
commit message. Otherwise, it looks weird that a group structure
contains a single iommu_device field instead of a list of iommu_device.

Regards,
Yi Liu

>  	bool			mdev_group;	/* An mdev group */
>  	bool			pinned_page_dirty_scope;
>  };
> @@ -1627,45 +1628,13 @@ static struct device
> *vfio_mdev_get_iommu_device(struct device *dev)
>  	return NULL;
>  }
> 
> -static int vfio_mdev_attach_domain(struct device *dev, void *data) -{
> -	struct iommu_domain *domain = data;
> -	struct device *iommu_device;
> -
> -	iommu_device = vfio_mdev_get_iommu_device(dev);
> -	if (iommu_device) {
> -		if (iommu_dev_feature_enabled(iommu_device,
> IOMMU_DEV_FEAT_AUX))
> -			return iommu_aux_attach_device(domain, iommu_device);
> -		else
> -			return iommu_attach_device(domain, iommu_device);
> -	}
> -
> -	return -EINVAL;
> -}
> -
> -static int vfio_mdev_detach_domain(struct device *dev, void *data) -{
> -	struct iommu_domain *domain = data;
> -	struct device *iommu_device;
> -
> -	iommu_device = vfio_mdev_get_iommu_device(dev);
> -	if (iommu_device) {
> -		if (iommu_dev_feature_enabled(iommu_device,
> IOMMU_DEV_FEAT_AUX))
> -			iommu_aux_detach_device(domain, iommu_device);
> -		else
> -			iommu_detach_device(domain, iommu_device);
> -	}
> -
> -	return 0;
> -}
> -
>  static int vfio_iommu_attach_group(struct vfio_domain *domain,
>  				   struct vfio_group *group)
>  {
>  	if (group->mdev_group)
> -		return iommu_group_for_each_dev(group->iommu_group,
> -						domain->domain,
> -						vfio_mdev_attach_domain);
> +		return iommu_aux_attach_group(domain->domain,
> +					      group->iommu_group,
> +					      group->iommu_device);
>  	else
>  		return iommu_attach_group(domain->domain, group-
> >iommu_group);  } @@ -1674,8 +1643,8 @@ static void
> vfio_iommu_detach_group(struct vfio_domain *domain,
>  				    struct vfio_group *group)
>  {
>  	if (group->mdev_group)
> -		iommu_group_for_each_dev(group->iommu_group, domain-
> >domain,
> -					 vfio_mdev_detach_domain);
> +		iommu_aux_detach_group(domain->domain, group->iommu_group,
> +				       group->iommu_device);
>  	else
>  		iommu_detach_group(domain->domain, group->iommu_group);  }
> @@ -2007,6 +1976,7 @@ static int vfio_iommu_type1_attach_group(void
> *iommu_data,
>  			return 0;
>  		}
> 
> +		group->iommu_device = iommu_device;
>  		bus = iommu_device->bus;
>  	}
> 
> --
> 2.17.1


  parent reply index

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-14  5:56 [PATCH v3 0/4] iommu aux-domain APIs extensions Lu Baolu
2020-07-14  5:57 ` [PATCH v3 1/4] iommu: Check IOMMU_DEV_FEAT_AUX feature in aux api's Lu Baolu
2020-07-29 20:03   ` Alex Williamson
2020-07-30  1:46     ` Lu Baolu
2020-07-14  5:57 ` [PATCH v3 2/4] iommu: Add iommu_aux_at(de)tach_group() Lu Baolu
2020-07-14 16:39   ` Jacob Pan
2020-07-15  0:47     ` Lu Baolu
2020-07-15 16:01       ` Jacob Pan
2020-07-16  1:07         ` Lu Baolu
2020-07-29 20:03           ` Alex Williamson
2020-07-29 23:34             ` Tian, Kevin
2020-07-30 19:46               ` Alex Williamson
2020-07-31  5:47                 ` Lu Baolu
2020-07-31 18:05                   ` Alex Williamson
2020-08-03  1:57                     ` Lu Baolu
2020-07-14  5:57 ` [PATCH v3 3/4] iommu: Add iommu_aux_get_domain_for_dev() Lu Baolu
2020-07-29 20:25   ` Alex Williamson
2020-07-29 23:49     ` Tian, Kevin
2020-07-30 20:17       ` Alex Williamson
2020-07-31  0:26         ` Tian, Kevin
2020-07-31  2:17         ` Tian, Kevin
2020-07-31  6:30     ` Lu Baolu
2020-07-31 18:14       ` Alex Williamson
2020-08-03  2:15         ` Lu Baolu
2020-07-14  5:57 ` [PATCH v3 4/4] vfio/type1: Use iommu_aux_at(de)tach_group() APIs Lu Baolu
2020-07-14  8:25   ` Christoph Hellwig
2020-07-14 16:29     ` Jacob Pan
2020-07-15  1:00       ` Lu Baolu
2020-07-15  1:23         ` Tian, Kevin
2020-07-29 20:32   ` Alex Williamson
2020-07-30  2:41     ` Lu Baolu
2020-07-30 21:17       ` Alex Williamson
2020-07-31  1:37         ` Lu Baolu
2020-07-30  9:36   ` Liu, Yi L [this message]
2020-07-31  1:39     ` Lu Baolu
2020-07-23 13:55 ` [PATCH v3 0/4] iommu aux-domain APIs extensions Lu Baolu

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=DM5PR11MB14351AE909E031B578EA3170C3710@DM5PR11MB1435.namprd11.prod.outlook.com \
    --to=yi.l.liu@intel.com \
    --cc=alex.williamson@redhat.com \
    --cc=ashok.raj@intel.com \
    --cc=baolu.lu@linux.intel.com \
    --cc=cohuck@redhat.com \
    --cc=dave.jiang@intel.com \
    --cc=iommu@lists.linux-foundation.org \
    --cc=jean-philippe@linaro.org \
    --cc=joro@8bytes.org \
    --cc=kevin.tian@intel.com \
    --cc=kvm@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=robin.murphy@arm.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

KVM Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/kvm/0 kvm/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 kvm kvm/ https://lore.kernel.org/kvm \
		kvm@vger.kernel.org
	public-inbox-index kvm

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.kvm


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git