On Tue, Nov 17, 2020 at 08:00:39PM +0530, Sai Prakash Ranjan wrote: > Some hardware variants contain a system cache or the last level > cache(llc). This cache is typically a large block which is shared > by multiple clients on the SOC. GPU uses the system cache to cache > both the GPU data buffers(like textures) as well the SMMU pagetables. > This helps with improved render performance as well as lower power > consumption by reducing the bus traffic to the system memory. > > The system cache architecture allows the cache to be split into slices > which then be used by multiple SOC clients. This patch series is an > effort to enable and use two of those slices preallocated for the GPU, > one for the GPU data buffers and another for the GPU SMMU hardware > pagetables. > > Patch 1 - Patch 6 adds system cache support in SMMU and GPU driver. > Patch 7 and 8 are minor cleanups for arm-smmu impl. > > Changes in v8: > * Introduce a generic domain attribute for pagetable config (Will) > * Rename quirk to more generic IO_PGTABLE_QUIRK_ARM_OUTER_WBWA (Will) > * Move non-strict mode to use new struct domain_attr_io_pgtbl_config (Will)
Modulo some minor comments I've made, this looks good to me. What is the plan for merging it? I can take the IOMMU parts, but patches 4-6 touch the MSM GPU driver and I'd like to avoid conflicts with that. Will
