On 6/13/07, Anthony Liguori <[EMAIL PROTECTED]> wrote: > Jun Koi wrote: > > Hi, > > > > In kvm_setup_pio() we have code like this: > > > > kvm_arch_ops->cache_regs(vcpu); > > memcpy(vcpu->pio_data, &vcpu->regs[VCPU_REGS_RAX], 4); > > kvm_arch_ops->decache_regs(vcpu); > > > > So what is the reason of saving RSP and RIP before the memcpy() > > function, then recovering it right after that? > > > > AFAICS, there nothing is change by the memcpy() function, so I cannot > > figure it out why it is necessary to do that. > > > > In SVM, cache_regs() actually syncs RAX. >
Anthony, I know that. But the main question is why decache_regs() is called here. And Avi told me that we can remove that unnecessary code. Thanks, Jun ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
