On Wed, Oct 16, 2013 at 05:13:40PM +0100, Jan Beulich wrote: > > It preserves *less* state, because the upper 32 bits of rip are now > > corrupted. Any 64-bit application that actually looks at the FP > > rip/rdp fields now get the WRONG VALUES. > > But again - this isn't being done for ordinary 64-bit applications, > this is only happening for KVM guests. And there not being a > protocol for telling the caller whether a certain context hold > 64-bit offsets or selector/offset pairs shouldn't be a reason to > think of a solution to the problem. > KVM knows what mode guest vcpu is in. is_long_mode(vcpu) will tell you if it is in long mode or not. No need to guess it. -- Gleb. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
