On Di, 2016-02-02 at 13:09 -0700, Alex Williamson wrote: > This is provided via a device specific region, look for it on Intel > VGA class devices. Our default mechanism to expose this to the BIOS > is via fw_cfg where it's expected that the BIOS will copy the data > into a reserved RAM area and update the ASL Storage register to > reference the GPA of that buffer.
> We also support directly mapping > the OpRegion through to the host in response to the ASL Storage > register write, which makes the data "live" and potentially provides > write access should the underlying vfio region support writes. This should better be splitted into a separate patch. > This > option is automatically enabled if we somehow don't support fw_cfg (is > this a good idea?). I think this can't happen. And even in case it can: we have bigger problems than the opregion then. cheers, Gerd
