On 16/03/2016 17:57, Michael S. Tsirkin wrote: > On Tue, Mar 08, 2016 at 01:30:50PM -0500, Gabriel Somlo wrote: >> Allowing for the future possibility of implementing AML-based >> (i.e., firmware-triggered) access to the QEMU fw_cfg device, >> acquire the global ACPI lock when accessing the device on behalf >> of the guest-side sysfs driver, to prevent any potential race >> conditions. >> >> Suggested-by: Michael S. Tsirkin <m...@redhat.com> >> Signed-off-by: Gabriel Somlo <so...@cmu.edu> > > So this patch makes sense of course. > > > Given the recent discussion on QEMU mailing list, > I think there is an additional patch that we need: > filter the files exposed to userspace by "opt/" prefix. > > This will ensure that we can change all other fw cfg files > at will without breaking guest scripts.
That makes no sense, all other fw_cfg files are firmware ABI so we cannot change them anyway. Paolo
