From: Alex Williamson <alex.williamson@redhat.com>
To: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Cc: kevin.tian@intel.com, kvm@vger.kernel.org,
pmorel@linux.vnet.ibm.com, linux-kernel@vger.kernel.org,
xuwei5@hisilicon.com, linuxarm@huawei.com,
iommu@lists.linux-foundation.org
Subject: Re: [PATCH v7 2/6] vfio/type1: Check reserve region conflict and update iova list
Date: Wed, 3 Jul 2019 14:34:27 -0600 [thread overview]
Message-ID: <20190703143427.2d63c15f@x1.home> (raw)
In-Reply-To: <20190626151248.11776-3-shameerali.kolothum.thodi@huawei.com>
On Wed, 26 Jun 2019 16:12:44 +0100
Shameer Kolothum <shameerali.kolothum.thodi@huawei.com> wrote:
> This retrieves the reserved regions associated with dev group and
> checks for conflicts with any existing dma mappings. Also update
> the iova list excluding the reserved regions.
>
> Reserved regions with type IOMMU_RESV_DIRECT_RELAXABLE are
> excluded from above checks as they are considered as directly
> mapped regions which are known to be relaxable.
>
> Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
> ---
> drivers/vfio/vfio_iommu_type1.c | 96 +++++++++++++++++++++++++++++++++
> 1 file changed, 96 insertions(+)
>
> diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c
> index 970d1ec06aed..b6bfdfa16c33 100644
> --- a/drivers/vfio/vfio_iommu_type1.c
> +++ b/drivers/vfio/vfio_iommu_type1.c
> @@ -1559,6 +1641,7 @@ static int vfio_iommu_type1_attach_group(void *iommu_data,
> phys_addr_t resv_msi_base;
> struct iommu_domain_geometry geo;
> LIST_HEAD(iova_copy);
> + LIST_HEAD(group_resv_regions);
>
> mutex_lock(&iommu->lock);
>
> @@ -1644,6 +1727,13 @@ static int vfio_iommu_type1_attach_group(void *iommu_data,
> goto out_detach;
> }
>
> + iommu_get_group_resv_regions(iommu_group, &group_resv_regions);
This can fail and should have an error case. I assume we'd fail the
group attach on failure. Thanks,
Alex
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next prev parent reply other threads:[~2019-07-03 20:34 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-26 15:12 [PATCH v7 0/6] vfio/type1: Add support for valid iova list management Shameer Kolothum
2019-06-26 15:12 ` [PATCH v7 1/6] vfio/type1: Introduce iova list and add iommu aperture validity check Shameer Kolothum
2019-07-03 20:34 ` Alex Williamson
2019-07-04 12:36 ` Shameerali Kolothum Thodi
2019-07-07 15:02 ` Auger Eric
2019-07-08 7:07 ` Shameerali Kolothum Thodi
2019-06-26 15:12 ` [PATCH v7 2/6] vfio/type1: Check reserve region conflict and update iova list Shameer Kolothum
2019-07-03 20:34 ` Alex Williamson [this message]
2019-07-04 12:51 ` Shameerali Kolothum Thodi
2019-07-05 12:09 ` Auger Eric
2019-07-08 6:59 ` Shameerali Kolothum Thodi
2019-07-04 22:06 ` Shameerali Kolothum Thodi
2019-07-07 15:02 ` Auger Eric
2019-06-26 15:12 ` [PATCH v7 3/6] vfio/type1: Update iova list on detach Shameer Kolothum
2019-07-03 20:34 ` Alex Williamson
2019-07-04 12:53 ` Shameerali Kolothum Thodi
2019-07-07 15:03 ` Auger Eric
2019-07-08 7:10 ` Shameerali Kolothum Thodi
2019-06-26 15:12 ` [PATCH v7 4/6] vfio/type1: check dma map request is within a valid iova range Shameer Kolothum
2019-07-07 15:03 ` Auger Eric
2019-06-26 15:12 ` [PATCH v7 5/6] vfio/type1: Add IOVA range capability support Shameer Kolothum
2019-07-07 15:03 ` Auger Eric
2019-06-26 15:12 ` [PATCH v7 6/6] vfio/type1: remove duplicate retrieval of reserved regions Shameer Kolothum
2019-07-07 15:03 ` Auger Eric
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