On 05/05/15 13:00, Vijay Kilari wrote: > On Tue, May 5, 2015 at 5:17 PM, Julien Grall <julien.gr...@citrix.com> wrote: >> On 05/05/15 12:06, Vijay Kilari wrote: >>> One MSI per domain is always consumed because each domain during >>> ITS initialization creates Virtual ITS and sends basic initialization >>> commands (MAPC) >> >> AFAICT, MAPC won't be translated to a physical command. So not interrupt >> completion is necessary. >> >> Couldn't we defer the interrupt completion allocation until a PCI device >> is passthrough or a command requiring physical command is sent? > > yes, but MAPC is generally followed by SYNC command and INVALL command > is also received during guest driver init.
You could ignore SYNC, INVALL until a PCI device is passthrough to the guest. > On option that I can think of is that avoid posting to physical > queue/completion > interrupt allocation, untill first MAPD command arrives for that domain. I prefer the solution where we ignore any command until a PCI device is passthrough. It's more logical. Regards, -- Julien Grall _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
