>>> On 05.11.15 at 11:47, <rcojoc...@bitdefender.com> wrote: > On 11/05/2015 12:42 PM, Jan Beulich wrote: >>>>> On 05.11.15 at 10:52, <rcojoc...@bitdefender.com> wrote: >>> I need to get the XSAVE size from userspace. The easiest way seems to be >>> to use the XEN_DOMCTL_getvcpuextstate hypercall, but that hypercall is >>> not public / there's no xenctrl.h wrapper for it. >> >> Before going into any detail of the rest of your mail - any reason you >> can't just consult CPUID output? > > That's because the userspace application doesn't live in dom0, but in a > dedicated privileged domain, and I'm unsure if a CPUID issued there > yields the same results as a CPUID issued in dom0. So I thought the > safest way is to get the information directly from the hypervisor. Is > this assumption incorrect?
See my other reply (to Andrew) - as long as there's no problem with using the maximum possible size, I don't see why you couldn't use just CPUID. Jan _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
