On 03/02/16 12:02, Stefano Stabellini wrote: > On Wed, 3 Feb 2016, Haozhong Zhang wrote: >> Or, we can make a file system on /dev/pmem0, create files on it, set >> the owner of those files to xen-qemuuser-domid$domid, and then pass >> those files to QEMU. In this way, non-root QEMU should be able to >> mmap those files. > > Maybe that would work. Worth adding it to the design, I would like to > read more details on it. > > Also note that QEMU initially runs as root but drops privileges to > xen-qemuuser-domid$domid before the guest is started. Initially QEMU > *could* mmap /dev/pmem0 while is still running as root, but then it > wouldn't work for any devices that need to be mmap'ed at run time > (hotplug scenario).
This is basically the same problem we have for a bunch of other things, right? Having xl open a file and then pass it via qmp to qemu should work in theory, right? -George _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel