Hi Magnus, On Mon, Jan 23, 2017 at 12:52 PM, Magnus Damm <magnus.damm@xxxxxxxxx> wrote: > From: Magnus Damm <damm+renesas@xxxxxxxxxxxxx> > > Here's a prototype that enables IMCTR_VA64 support for the IPMMU driver > on R-Car Gen3 platforms. I've tested it lightly on r8a7796 Salvator-X > with local second serial port code and SYS-DMAC support via DMA Engine. > > My goal has been to enable 40 bits or more of IOVA space, but it turns > out that it requires either 64K page size support or support for 4K pages > starting from level 0. > > For now this keeps 32-bit IOVA space however the hardware gets configured > to enable IMCTR_VA64 which also seems to require setting up TSZ0[5:0]. > > Signed-off-by: Magnus Damm <damm+renesas@xxxxxxxxxxxxx> Do you mean this is incompatible with "dmaengine: rcar-dmac: Widen DMA mask to 40 bits" (http://www.spinics.net/lists/linux-renesas-soc/msg08338.html), so we can still not upstream that patch? Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds
