Messages in this thread | | | From | Tomasz Jeznach <> | Date | Thu, 20 Jul 2023 10:30:14 -0700 | Subject | Re: [PATCH 01/11] RISC-V: drivers/iommu: Add RISC-V IOMMU - Ziommu support. |
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On Thu, Jul 20, 2023 at 5:31 AM Baolu Lu <baolu.lu@linux.intel.com> wrote: > > On 2023/7/20 3:33, Tomasz Jeznach wrote: > > +static void riscv_iommu_iotlb_sync_map(struct iommu_domain *iommu_domain, > > + unsigned long iova, size_t size) > > +{ > > + unsigned long end = iova + size - 1; > > + /* > > + * Given we don't know the page size used by this range, we assume the > > + * smallest page size to ensure all possible entries are flushed from > > + * the IOATC. > > + */ > > + size_t pgsize = PAGE_SIZE; > > + riscv_iommu_flush_iotlb_range(iommu_domain, &iova, &end, &pgsize); > > +} > > Does RISC-V IOMMU require to invalidate the TLB cache after new mappings > are created? >
No. Only on unmapping / permission change. Thanks for pointing this out.
> Best regards, > baolu
regards, - Tomasz
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