On 08/05/17 17:17, Ross Lagerwall wrote: > Some EFI firmware implementations may place the EFI properties table in > RAM marked as BootServicesData, which Xen does not consider as reserved. > When dom0 tries to access the EFI properties table (which Linux >= 4.4 > does), it crashes with a page fault.
The pagefault is just a side effect of Linux blindly assuming that the ioremap() request succeeded. From Xen's point of view, Dom0 tries to map a page which doesn't belong to dom_xen, resulting a permission failure. > Fix this by unconditionally > marking the EFI properties table as reserved in the E820, much like is > done with the dmi regions. > > Signed-off-by: Ross Lagerwall <ross.lagerw...@citrix.com> Reviewed-by: Andrew Cooper <andrew.coop...@citrix.com> This is probably also 4.9 material. _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel
