On Thu, May 15, 2014 at 06:51:28PM +0200, Paolo Bonzini wrote: > During task switch, all of CS.DPL, CS.RPL, SS.DPL must match (in addition > to all the other requirements) and will be the new CPL. So far this > worked by carefully setting the CS selector and flag before doing the > task switch; however, this will not work once we get the CPL from SS.DPL: > setting SS itself would fail if the task switch changes the privilege > level. > > Temporarily assume that the CPL comes from CS.RPL during task switch > to a protected-mode task. This is the same approach used in QEMU's > emulation code, which (until version 2.0) manually tracks the CPL. > > Signed-off-by: Paolo Bonzini <[email protected]>
Reviewed-by: Marcelo Tosatti <[email protected]> -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
