From: Auger Eric <eric.auger-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
To: Lu Baolu <baolu.lu-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>,
Joerg Roedel <joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>,
David Woodhouse <dwmw2-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>,
Alex Williamson
<alex.williamson-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
Kirti Wankhede
<kwankhede-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
Cc: kevin.tian-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org,
ashok.raj-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org,
tiwei.bie-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org,
Jean-Philippe Brucker
<jean-philippe.brucker-5wv7dgnIgG8@public.gmane.org>,
sanjay.k.kumar-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org,
iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
yi.y.sun-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org,
jacob.jun.pan-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org,
kvm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [PATCH v4 8/8] vfio/type1: Handle different mdev isolation type
Date: Fri, 23 Nov 2018 15:23:21 +0100 [thread overview]
Message-ID: <e9822321-fca3-29bc-f5a1-c6297d2161ae@redhat.com> (raw)
In-Reply-To: <20181105073408.21815-9-baolu.lu-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
Hi Lu,
On 11/5/18 8:34 AM, Lu Baolu wrote:
> This adds the support to determine the isolation type
> of a mediated device group by checking whether it has
> an iommu device. If an iommu device exists, an iommu
> domain will be allocated and then attached to the iommu
> device. Otherwise, keep the same behavior as it is.
>
> Cc: Ashok Raj <ashok.raj-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
> Cc: Jacob Pan <jacob.jun.pan-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
> Cc: Kevin Tian <kevin.tian-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
> Cc: Liu Yi L <yi.l.liu-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
> Signed-off-by: Sanjay Kumar <sanjay.k.kumar-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
> Signed-off-by: Lu Baolu <baolu.lu-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
> Signed-off-by: Liu Yi L <yi.l.liu-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
> ---
> drivers/vfio/vfio_iommu_type1.c | 48 ++++++++++++++++++++++++++++-----
> 1 file changed, 42 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c
> index 178264b330e7..eed26129f58c 100644
> --- a/drivers/vfio/vfio_iommu_type1.c
> +++ b/drivers/vfio/vfio_iommu_type1.c
> @@ -1427,13 +1427,40 @@ static void vfio_iommu_detach_group(struct vfio_domain *domain,
> iommu_detach_group(domain->domain, group->iommu_group);
> }
>
> +static bool vfio_bus_is_mdev(struct bus_type *bus)
> +{
> + struct bus_type *mdev_bus;
> + bool ret = false;
> +
> + mdev_bus = symbol_get(mdev_bus_type);
> + if (mdev_bus) {
> + ret = (bus == mdev_bus);
> + symbol_put(mdev_bus_type);
> + }
> +
> + return ret;
> +}
> +
> +static int vfio_mdev_iommu_device(struct device *dev, void *data)
> +{
> + struct device **old = data, *new;
> +
> + new = vfio_mdev_get_iommu_device(dev);
> + if (*old && *old != new)
if !new can't you return -EINVAL as well?
> + return -EINVAL;
> +
> + *old = new;
> +
> + return 0;
> +}
> +
> static int vfio_iommu_type1_attach_group(void *iommu_data,
> struct iommu_group *iommu_group)
> {
> struct vfio_iommu *iommu = iommu_data;
> struct vfio_group *group;
> struct vfio_domain *domain, *d;
> - struct bus_type *bus = NULL, *mdev_bus;
> + struct bus_type *bus = NULL;
> int ret;
> bool resv_msi, msi_remap;
> phys_addr_t resv_msi_base;
> @@ -1468,11 +1495,18 @@ static int vfio_iommu_type1_attach_group(void *iommu_data,
> if (ret)
> goto out_free;
>
> - mdev_bus = symbol_get(mdev_bus_type);
> + if (vfio_bus_is_mdev(bus)) {
> + struct device *iommu_device = NULL;
>
> - if (mdev_bus) {
> - if ((bus == mdev_bus) && !iommu_present(bus)) {
> - symbol_put(mdev_bus_type);
> + group->mdev_group = true;
> +
> + /* Determine the isolation type */
> + ret = iommu_group_for_each_dev(iommu_group, &iommu_device,
> + vfio_mdev_iommu_device);
> + if (ret)
> + goto out_free;
> +
> + if (!iommu_device) {
> if (!iommu->external_domain) {
> INIT_LIST_HEAD(&domain->group_list);
> iommu->external_domain = domain;
> @@ -1482,9 +1516,11 @@ static int vfio_iommu_type1_attach_group(void *iommu_data,
> list_add(&group->next,
> &iommu->external_domain->group_list);
> mutex_unlock(&iommu->lock);
> +
extra new line
> return 0;
> }
> - symbol_put(mdev_bus_type);
> +
> + bus = iommu_device->bus;
> }
>
> domain->domain = iommu_domain_alloc(bus);
>
Thanks
Eric
next prev parent reply other threads:[~2018-11-23 14:23 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-05 7:34 [PATCH v4 0/8] vfio/mdev: IOMMU aware mediated device Lu Baolu
[not found] ` <20181105073408.21815-1-baolu.lu-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
2018-11-05 7:34 ` [PATCH v4 1/8] iommu: Add APIs for multiple domains per device Lu Baolu
2018-11-23 10:50 ` Auger Eric
[not found] ` <51871885-05d2-febc-1dba-4d74108d0f46-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2018-11-26 2:04 ` Lu Baolu
2018-12-04 3:46 ` [PATCH v4 0/8] vfio/mdev: IOMMU aware mediated device Xu Zaibo
[not found] ` <5C05F87D.4050206-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
2018-12-04 6:20 ` Lu Baolu
2018-12-04 6:50 ` Xu Zaibo
2018-11-05 7:34 ` [PATCH v4 2/8] iommu/vt-d: Add multiple domains per device query Lu Baolu
[not found] ` <20181105073408.21815-3-baolu.lu-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
2018-11-23 10:49 ` Auger Eric
2018-11-26 2:10 ` Lu Baolu
2018-11-05 7:34 ` [PATCH v4 3/8] iommu/vt-d: Enable/disable multiple domains per device Lu Baolu
2018-11-05 7:34 ` [PATCH v4 4/8] iommu/vt-d: Attach/detach domains in auxiliary mode Lu Baolu
2018-11-23 10:49 ` Auger Eric
[not found] ` <d714fb14-6217-f9c7-a5b2-2fc67e4bcd4c-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2018-11-26 2:37 ` Lu Baolu
2018-11-05 7:34 ` [PATCH v4 5/8] iommu/vt-d: Return ID associated with an auxiliary domain Lu Baolu
2018-11-05 7:34 ` [PATCH v4 6/8] vfio/mdev: Add iommu place holders in mdev_device Lu Baolu
[not found] ` <20181105073408.21815-7-baolu.lu-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
2018-11-05 14:51 ` Christoph Hellwig
2018-11-05 23:33 ` Lu Baolu
2018-11-06 23:53 ` Alex Williamson
2018-11-07 1:48 ` Lu Baolu
2018-11-15 21:31 ` Kirti Wankhede
2018-11-16 1:20 ` Lu Baolu
2018-11-16 8:57 ` Christoph Hellwig
2018-11-17 2:37 ` Lu Baolu
2018-11-20 20:52 ` Kirti Wankhede
2018-11-21 8:45 ` Christoph Hellwig
2018-12-03 16:27 ` Kirti Wankhede
2018-11-05 7:34 ` [PATCH v4 7/8] vfio/type1: Add domain at(de)taching group helpers Lu Baolu
[not found] ` <20181105073408.21815-8-baolu.lu-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
2018-11-23 14:13 ` Auger Eric
[not found] ` <b5f5eda1-2dbf-dd7e-3b68-bfd9e5099c06-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2018-11-26 3:05 ` Lu Baolu
2018-11-05 7:34 ` [PATCH v4 8/8] vfio/type1: Handle different mdev isolation type Lu Baolu
[not found] ` <20181105073408.21815-9-baolu.lu-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
2018-11-23 14:23 ` Auger Eric [this message]
2018-11-26 3:09 ` Lu Baolu
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