Hello Oleksandr-san, > From: Oleksandr Tyshchenko, Sent: Tuesday, December 21, 2021 6:16 AM > > From: Oleksandr Tyshchenko <oleksandr_tyshche...@epam.com> > > Based on the following Linux upsteam commit: > 7a62ced8ebd0e1b692c9dc4781a8d4ddb0f74792 > > Original commit message: > commit 7a62ced8ebd0e1b692c9dc4781a8d4ddb0f74792 > Author: Yoshihiro Shimoda <yoshihiro.shimoda...@renesas.com> > Date: Tue Sep 7 17:30:20 2021 +0900 > > iommu/ipmmu-vmsa: Add support for r8a779a0 > > Add support for r8a779a0 (R-Car V3U). The IPMMU hardware design > of this SoC differs than others. So, add a new ipmmu_features for it. > > Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda...@renesas.com> > Reviewed-by: Geert Uytterhoeven <geert+rene...@glider.be> > Link: > https://jpn01.safelinks.protection.outlook.com/?url=https%3A%2F%2Flore.kernel.org%2Fr%2F20210907083020.907648-3-yosh > ihiro.shimoda.uh%40renesas.com&data=04%7C01%7Cyoshihiro.shimoda.uh%40renesas.com%7C995a1c66b6d841ccc79a08d9c3fdf > 90a%7C53d82571da1947e49cb4625a166a4a2a%7C0%7C0%7C637756317833053012%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQ > IjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=TirhJToNqy33Fzt0tSpukl9YFOj4iHgd3M1lX8W%2Bxlo%3D&res > erved=0 > Signed-off-by: Joerg Roedel <jroe...@suse.de> > > ********** > > The R-Car S4 is an automotive System-on-Chip (SoC) for Car > Server/Communication Gateway and is one of the first products > in Renesas' 4th-generation R-Car Family. > > The integrated IOMMU HW is also VMSA-compatible and supports > stage 2 translation table format, therefore can be used with > current driver with slight modifications (thanks to the prereq > work). > > In the context of Xen driver the main differences between Gen3 > and Gen4 are the following: > - HW capacity was enlarged to support up to 16 IPMMU contexts > (sets of page table) and up to 64 micro-TLBs per IPMMU device > - the memory mapped registers have different bases and offsets > > Please note that Linux upstream doesn't support R-Car S4 SoC > yet unlike Renesas BSP [1], but it was decided to reuse upstream > patch for R-Car V3U anyway as the IPMMU HW settings are similar. > > [1] > 7003b9f732cf iommu/ipmmu-vmsa: Add Renesas R8A779F0 (R-Car S4) support <snip> > > Signed-off-by: Oleksandr Tyshchenko <oleksandr_tyshche...@epam.com> > Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushche...@epam.com>
Thank you for the patch! Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda...@renesas.com> Best regards, Yoshihiro Shimoda
