On Tue, May 21, 2013 at 11:50:30AM +0200, Joerg Roedel wrote: > Hey Stephen, > > On Mon, May 20, 2013 at 02:24:31PM -0700, Stephen Hemminger wrote: > > ioperm() inheritance across threads is different in KVM then when run > > on physical hardware. The following program runs on physical hardware > > but get SEGV under KVM. > > > > It appears that the I/O permission bits are not shared between threads > > in the same way. > > Is this specific to SVM or do you see it on VMX too? My first guess > would be that the KVM instruction emulator does not check to > IO-permissions correctly, but that would affect VMX and SVM. > The program segfaults on physical hardware: # ./a.out joining waiting beeping Segmentation fault -- 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
