On Wed, Sep 18, 2019 at 11:41:13AM +0100, Paul Durrant wrote: > ...and hence the ability to disable IOMMU mappings, and control EPT > sharing. > > This patch introduces a new 'libxl_passthrough' enumeration into > libxl_domain_create_info. The value will be set by xl either when it parses > a new 'passthrough' option in xl.cfg, or implicitly if there is passthrough > hardware specified for the domain. > > If the value of the passthrough configuration option is 'disabled' then > the XEN_DOMCTL_CDF_iommu flag will be clear in the xen_domctl_createdomain > flags, thus allowing the toolstack to control whether the domain gets > IOMMU mappings or not (where previously they were globally set). > > If the value of the passthrough configuration option is 'sync_pt' then > a new 'iommu_opts' field in xen_domctl_createdomain will be set with the > value XEN_DOMCTL_IOMMU_no_sharept. This will override the global default > set in iommu_hap_pt_share, thus allowing the toolstack to control whether > EPT sharing is used for the domain. > > If the value of passthrough is 'enabled' then xl will choose an appropriate > default according to the type of domain and hardware support. > > NOTE: The 'iommu_memkb' overhead in libxl_domain_build_info will now only > be set if passthrough is 'sync_pt' (or xl has chosen this mode as > a default). > > Signed-off-by: Paul Durrant <paul.durr...@citrix.com> > Reviewed-by: Jan Beulich <jbeul...@suse.com> > Acked-by: Christian Lindig <christian.lin...@citrix.com> > Acked-by: Julien Grall <julien.gr...@arm.com>
Reviewed-by: Anthony PERARD <anthony.per...@citrix.com> Thanks, -- Anthony PERARD _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
