Hi, Wei On Fri, Jul 28, 2017 at 7:16 PM, Wei Liu <wei.l...@citrix.com> wrote: > On Tue, Jul 25, 2017 at 08:26:51PM +0300, Oleksandr Tyshchenko wrote: >> From: Oleksandr Tyshchenko <oleksandr_tyshche...@epam.com> >> >> This flag is intended to let Xen know that the guest has devices >> which will most likely be used for passthrough and as the result >> the IOMMU is expected to be used for this domain. >> >> The primary aim of this knowledge is to help the IOMMUs that don't >> share page tables with the CPU on ARM be ready before P2M code starts >> updating IOMMU mapping. >> So, if this flag is set the non-shared IOMMUs will populate >> their page tables at the domain creation time and thereby will be able >> to handle IOMMU mapping updates from *the very beginning*. >> >> In order to retain the current behavior for x86 still call >> iommu_domain_init() with use_iommu flag being forced to false. >> >> Signed-off-by: Oleksandr Tyshchenko <oleksandr_tyshche...@epam.com> >> CC: Jan Beulich <jbeul...@suse.com> >> CC: Julien Grall <julien.gr...@arm.com> >> CC: Ian Jackson <ian.jack...@eu.citrix.com> >> CC: Wei Liu <wei.l...@citrix.com> >> >> --- >> Changes in V1: >> - Treat use_iommu flag as the ARM decision only. Don't use >> common domain creation flag for it, use ARM config instead. >> - Clarify patch subject/description. >> >> Changes in V2: >> - Cosmetic fixes. >> --- >> tools/libxl/libxl_arm.c | 8 ++++++++ > > Acked-by: Wei Liu <wei.l...@citrix.com>
Great. Thank you. -- Regards, Oleksandr Tyshchenko _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel
