[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] RE: [Xen-ia64-devel] Floating-point software assist (FPSWA) on Xen-ia64
For native, the platform firmware comes with build-in FPSWA. If there is a new FPSWA.efi presented in the disk, the firmware will drop its default FPSWA. For DomainVTI to run, there is a Guest Firmware (GFW), with default FPSWA build-in, presented to domain. -Fred There is Guest Firmware (GFW) used for DomainVTI. Magenheimer, Dan (HP Labs Fort Collins) wrote: > Yongkang has discovered that some LTP tests fail > because Xen/ia64 (non-VTI) does not support FPSWA. > Non-support of FPSWA is a known problem that has > been on the to-do list for some time: > > http://lists.xensource.com/archives/html/xen-devel/2004-12/msg00382.html > > but this is the first time that it has been seen > in real (test) usage. > > Yongkang says that the test works with VTI. How does > VTI handle FPSWA? Is direct access to fpswa.efi provided > to every domain or is fpswa.efi "owned" by the hypervisor > and floating-point assist traps handled by Xen invisibly > to domains? > > A couple of related questions: Is fpswa.efi re-entrant? > Does fpswa.efi ever disable interrupts? > > I don't think this will be hard to fix, but it would > be best if the implementation is consistent between > VTI and non-VTI. > > Thanks, > Dan > > _______________________________________________ > Xen-ia64-devel mailing list > Xen-ia64-devel@xxxxxxxxxxxxxxxxxxx > http://lists.xensource.com/xen-ia64-devel _______________________________________________ Xen-ia64-devel mailing list Xen-ia64-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-ia64-devel
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