Re: [PATCH 01/11] RISC-V: drivers/iommu: Add RISC-V IOMMU - Ziommu support.

[Baolu Lu]

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?

Best regards,
baolu