On Wed, Jan 26, 2022 at 6:20 PM Julien Grall <jul...@xen.org> wrote: > Hi Oleksandr, >
Hi Julien, [Sorry for the possible format issues] > > On 27/11/2021 17:51, Oleksandr Tyshchenko wrote: > > From: Oleksandr Tyshchenko <oleksandr_tyshche...@epam.com> > > > > 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 R-Car Gen3 driver with > slight > > modifications. > > > > In the context of Xen driver the main differences between Gen3 and S4 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 offset > > > > The first part (commits #1-6) is a non-verbatim port of Linux upstream > commits > > needed to add support for S4 series easily (prereq work). > > The second part (commits #7-8) is based on the code from the Renesas BSP > and > > actually introduces support for R-Car S4 IPMMU. > > The third part (commits #9-10) is misc changes I have locally. > > > > The patch series is based on 4.16.0-rc4 branch and also available at [1]. > > > > Tested on Renesas Salvator-X board with H3 ES3.0 SoC (Gen3) and Renesas > Spider > > board with S4 SoC. > > > > [1] https://github.com/otyshchenko1/xen/commits/s4_ipmmu_ml1 > > > > Oleksandr Tyshchenko (10): > > iommu/ipmmu-vmsa: Remove all unused register definitions > > iommu/ipmmu-vmsa: Add helper functions for MMU "context" registers > > iommu/ipmmu-vmsa: Add helper functions for "uTLB" registers > > iommu/ipmmu-vmsa: Add light version of Linux's ipmmu_features > > iommu/ipmmu-vmsa: Calculate context registers' offset instead of a > > macro > > iommu/ipmmu-vmsa: Add utlb_offset_base > > iommu/ipmmu-vmsa: Add Renesas R8A779F0 (R-Car S4) support > > iommu/ipmmu-vmsa: Set IPMMU bit IMSCTLR_USE_SECGRP to 0 > > iommu/ipmmu-vmsa: Use refcount for the micro-TLBs > > iommu/arm: Remove code duplication in all IOMMU drivers > > Skimming through the series, it looks like patch #1 - #6 are fully > acked. The rest would need a respin. > > Can I commit the first part (i.e. #1 - #6)? > Please note, this is V1. But V2 [1] was pushed a couple of weeks ago and all patches are already reviewed) [1] https://lore.kernel.org/xen-devel/1640034957-19764-1-git-send-email-olekst...@gmail.com/ > Cheers, > > > > > xen/drivers/passthrough/Kconfig | 6 +- > > xen/drivers/passthrough/arm/iommu.c | 7 + > > xen/drivers/passthrough/arm/ipmmu-vmsa.c | 278 > +++++++++++++++++++------------ > > xen/drivers/passthrough/arm/smmu-v3.c | 10 -- > > xen/drivers/passthrough/arm/smmu.c | 10 -- > > 5 files changed, 178 insertions(+), 133 deletions(-) > > > > -- > Julien Grall > -- Regards, Oleksandr Tyshchenko
