Hi Heiko, On 02/04/2019 12:37, Heiko Stuebner wrote: > From: Vicente Bergas <[email protected]> > > As explained by Robin Murphy: >> the IOMMU shutdown disables paging, so if the VOP is still >> scanning out then that will result in whatever IOVAs it was using now going >> straight out onto the bus as physical addresses. > > We had a more radical approach before in commit > 7f3ef5dedb14 ("drm/rockchip: Allow driver to be shutdown on reboot/kexec") > but that resulted in new warnings and oopses on shutdown on rk3399 > chromeos devices. > > So second try is resurrecting Vicentes shutdown change which should > achieve the same result but in a less drastic way. > > Fixes: 63238173b2fa ("Revert drm/rockchip: Allow driver to be shutdown on > reboot/kexec") > Cc: Jeffy Chen <[email protected]> > Cc: Robin Murphy <[email protected]> > Cc: Marc Zyngier <[email protected]> > Cc: Brian Norris <[email protected]> > Cc: Doug Anderson <[email protected]> > Cc: [email protected] > Suggested-by: JeffyChen <[email protected]> > Suggested-by: Robin Murphy <[email protected]> > Signed-off-by: Vicente Bergas <[email protected]> > [adapted commit message to explain the history] > Signed-off-by: Heiko Stuebner <[email protected]>
Sorry it took so long to test this. I've just given it a go on kevin, and managed to kexec into a secondary kernel. So FWIW: Acked-by: Marc Zyngier <[email protected]> M. -- Jazz is not dead. It just smells funny... _______________________________________________ dri-devel mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/dri-devel
