Hi Joerg, Robin, On 10/11/2016 16:37, Joerg Roedel wrote: > On Fri, Nov 04, 2016 at 11:24:02AM +0000, Eric Auger wrote: >> Introduce a new iommu_reserved_region struct. This embodies >> an IOVA reserved region that cannot be used along with the IOMMU >> API. The list is protected by a dedicated mutex. >> >> An iommu domain now owns a list of those. >> >> Signed-off-by: Eric Auger <eric.au...@redhat.com> >> >> --- >> --- >> drivers/iommu/iommu.c | 2 ++ >> include/linux/iommu.h | 17 +++++++++++++++++ >> 2 files changed, 19 insertions(+) >> >> diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c >> index 9a2f196..0af07492 100644 >> --- a/drivers/iommu/iommu.c >> +++ b/drivers/iommu/iommu.c >> @@ -1061,6 +1061,8 @@ static struct iommu_domain >> *__iommu_domain_alloc(struct bus_type *bus, >> >> domain->ops = bus->iommu_ops; >> domain->type = type; >> + INIT_LIST_HEAD(&domain->reserved_regions); >> + mutex_init(&domain->resv_mutex); > > These regions are a property of the iommu-group, they are specific to a > device or a group of devices, not to a particular domain where devics > (iommu-groups) can come and go. > > Further I agree with Robin that this is similar to the > get_dm_regions/set_dm_regions approach, which should be changed/extended > for this instead of adding something new. OK I am currently respinning, taking this into account. I will put the reserved region file attribute in the iommu-group sysfs dir.
Thanks Eric > > > Joerg > > -- > To unsubscribe from this list: send the line "unsubscribe kvm" in > the body of a message to majord...@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
