On Sun, Feb 21, 2010 at 02:09:15PM +0100, Joerg Roedel wrote: > On Sun, Feb 21, 2010 at 02:54:01PM +0200, Avi Kivity wrote: > > So, if some other cpu (or the guest itself, with appropriate > > permissions) modifies the msr permission bitmap, svm will not notice > > this? svm loads the bitmap during entry? > > Yes. Talked again with a few people about it and the architectural answer is a bit different. The right answer to that is: The cpu is allowed to load the msr permission map to internal state, but not required to do it by the architecture. The result of changing the msr permission map of a running vmcb is undefined. So we are fine with the way nested svm does it. And we don't need to care about that situation at all and just migrate whats in guest memory. Thanks, Joerg -- 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
