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. Regards, Anthony Liguori > Many 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 > > ------------------------------------------------------------------------- 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
