From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alex Williamson Subject: Re: [PATCH v8 8/9] vfio/type1: Add domain at(de)taching group helpers Date: Tue, 26 Mar 2019 11:42:33 -0600 Message-ID: <20190326114233.2ec4334a@x1.home> References: <20190325013036.18400-1-baolu.lu@linux.intel.com> <20190325013036.18400-9-baolu.lu@linux.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: kevin.tian-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, ashok.raj-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, tiwei.bie-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, Jean-Philippe Brucker , sanjay.k.kumar-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, yi.y.sun-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Kirti Wankhede , iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, jacob.jun.pan-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, kvm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, David Woodhouse To: Lu Baolu Return-path: In-Reply-To: <20190325013036.18400-9-baolu.lu-VuQAYsv1563Yd54FQh9/CA@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org List-Id: kvm.vger.kernel.org On Mon, 25 Mar 2019 09:30:35 +0800 Lu Baolu wrote: > This adds helpers to attach or detach a domain to a > group. This will replace iommu_attach_group() which > only works for non-mdev devices. > > If a domain is attaching to a group which includes the > mediated devices, it should attach to the iommu device > (a pci device which represents the mdev in iommu scope) > instead. The added helper supports attaching domain to > groups for both pci and mdev devices. > > Cc: Ashok Raj > Cc: Jacob Pan > Cc: Kevin Tian > Signed-off-by: Sanjay Kumar > Signed-off-by: Liu Yi L > Signed-off-by: Lu Baolu > Reviewed-by: Jean-Philippe Brucker > --- > drivers/vfio/vfio_iommu_type1.c | 84 ++++++++++++++++++++++++++++++--- > 1 file changed, 77 insertions(+), 7 deletions(-) Acked-by: Alex Williamson > diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c > index 73652e21efec..ccc4165474aa 100644 > --- a/drivers/vfio/vfio_iommu_type1.c > +++ b/drivers/vfio/vfio_iommu_type1.c > @@ -91,6 +91,7 @@ struct vfio_dma { > struct vfio_group { > struct iommu_group *iommu_group; > struct list_head next; > + bool mdev_group; /* An mdev group */ > }; > > /* > @@ -1298,6 +1299,75 @@ static bool vfio_iommu_has_sw_msi(struct iommu_group *group, phys_addr_t *base) > return ret; > } > > +static struct device *vfio_mdev_get_iommu_device(struct device *dev) > +{ > + struct device *(*fn)(struct device *dev); > + struct device *iommu_device; > + > + fn = symbol_get(mdev_get_iommu_device); > + if (fn) { > + iommu_device = fn(dev); > + symbol_put(mdev_get_iommu_device); > + > + return iommu_device; > + } > + > + 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); > + else > + return iommu_attach_group(domain->domain, group->iommu_group); > +} > + > +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); > + else > + iommu_detach_group(domain->domain, group->iommu_group); > +} > + > static int vfio_iommu_type1_attach_group(void *iommu_data, > struct iommu_group *iommu_group) > { > @@ -1373,7 +1443,7 @@ static int vfio_iommu_type1_attach_group(void *iommu_data, > goto out_domain; > } > > - ret = iommu_attach_group(domain->domain, iommu_group); > + ret = vfio_iommu_attach_group(domain, group); > if (ret) > goto out_domain; > > @@ -1405,8 +1475,8 @@ static int vfio_iommu_type1_attach_group(void *iommu_data, > list_for_each_entry(d, &iommu->domain_list, next) { > if (d->domain->ops == domain->domain->ops && > d->prot == domain->prot) { > - iommu_detach_group(domain->domain, iommu_group); > - if (!iommu_attach_group(d->domain, iommu_group)) { > + vfio_iommu_detach_group(domain, group); > + if (!vfio_iommu_attach_group(d, group)) { > list_add(&group->next, &d->group_list); > iommu_domain_free(domain->domain); > kfree(domain); > @@ -1414,7 +1484,7 @@ static int vfio_iommu_type1_attach_group(void *iommu_data, > return 0; > } > > - ret = iommu_attach_group(domain->domain, iommu_group); > + ret = vfio_iommu_attach_group(domain, group); > if (ret) > goto out_domain; > } > @@ -1440,7 +1510,7 @@ static int vfio_iommu_type1_attach_group(void *iommu_data, > return 0; > > out_detach: > - iommu_detach_group(domain->domain, iommu_group); > + vfio_iommu_detach_group(domain, group); > out_domain: > iommu_domain_free(domain->domain); > out_free: > @@ -1531,7 +1601,7 @@ static void vfio_iommu_type1_detach_group(void *iommu_data, > if (!group) > continue; > > - iommu_detach_group(domain->domain, iommu_group); > + vfio_iommu_detach_group(domain, group); > list_del(&group->next); > kfree(group); > /* > @@ -1596,7 +1666,7 @@ static void vfio_release_domain(struct vfio_domain *domain, bool external) > list_for_each_entry_safe(group, group_tmp, > &domain->group_list, next) { > if (!external) > - iommu_detach_group(domain->domain, group->iommu_group); > + vfio_iommu_detach_group(domain, group); > list_del(&group->next); > kfree(group); > }