>>> Shuai Ruan <shuai.r...@linux.intel.com> 04/06/16 8:59 AM >>> >Another question is whether we should add this in pv_cpuid() or not. >(which we have discussed in the previous thread). > >Refer to SDM Volume 1 >"13.2 ENUMERATION OF CPU SUPPORT FOR XSAVE INSTRUCTIONS AND XSAVE- >SUPPORTED FEATURES" >— CPUID function 0DH, sub-function 1. >... >"EBX enumerates the size (in bytes) required by the XSAVES instruction >for an XSAVE area containing all >the state components corresponding to bits currently set in XCR0 | >IA32_XSS." > >From the descriptions above, EBX only be used when XSAVES is enabled. >So I think we should not deal with pv_cpuid() here.
If it's mandated to be XSAVES only - yes. But why are you asking such a question? It was you who proposed the change to pv_cpuid(), and it is you who should be understanding the specifics of the various pieces of CPUID output related to XSAVE better than me. Jan _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
