From: Pierre Morel <pmorel@linux.ibm.com>
To: gerald.schaefer@de.ibm.com
Cc: joro@8bytes.org, linux-s390@vger.kernel.org,
iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org,
alex.williamson@redhat.com, shameerali.kolothum.thodi@huawei.com,
walling@linux.ibm.com
Subject: [PATCH v1] iommu/s390: Declare s390 iommu reserved regions
Date: Tue, 15 Jan 2019 18:37:29 +0100 [thread overview]
Message-ID: <1547573850-9459-1-git-send-email-pmorel@linux.ibm.com> (raw)
The s390 iommu can only allow DMA transactions between the zPCI device
entries start_dma and end_dma.
Let's declare the regions before start_dma and after end_dma as
reserved regions using the appropriate callback in iommu_ops.
The reserved region may later be retrieved from sysfs or from
the vfio iommu internal interface.
This seems to me related with the work Shameer has started on
vfio_iommu_type1 so I add Alex and Shameer to the CC list.
Pierre Morel (1):
iommu/s390: Declare s390 iommu reserved regions
drivers/iommu/s390-iommu.c | 29 +++++++++++++++++++++++++++++
1 file changed, 29 insertions(+)
--
2.7.4
next reply other threads:[~2019-01-15 17:37 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-15 17:37 Pierre Morel [this message]
2019-01-15 17:37 ` [PATCH v1] iommu/s390: Declare s390 iommu reserved regions Pierre Morel
2019-01-15 19:33 ` Gerald Schaefer
2019-01-16 9:33 ` Pierre Morel
2019-01-17 9:23 ` Shameerali Kolothum Thodi
2019-01-17 13:02 ` Pierre Morel
2019-01-17 13:02 ` Robin Murphy
2019-01-18 13:29 ` Pierre Morel
2019-01-18 13:51 ` Jean-Philippe Brucker
2019-01-18 13:51 ` Jean-Philippe Brucker
2019-01-21 11:51 ` Pierre Morel
2019-01-21 15:50 ` Jean-Philippe Brucker
2019-01-22 17:58 ` Alex Williamson
2019-01-21 12:49 ` Robin Murphy
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