On 05/11/15 10:42, 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?
It depends on precisely what you want. CPUID.0xD[0].ecx gives you the maximum xsave area on this processor CPUID.0xD[0].ebx gives you the current size for the value in xcr0, but that is not very useful from userspace. ~Andrew _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
