Re: [PATCH 11/20] vfio/cxl: Expose DPA memory region to userspace with fault+zap mmap

[Dave Jiang]

On 3/11/26 1:34 PM, mhonap@xxxxxxxxxx wrote:
> From: Manish Honap <mhonap@xxxxxxxxxx> 
< --snip-- >

> +int vfio_cxl_register_cxl_region(struct vfio_pci_core_device *vdev)
> +{
> +	struct vfio_pci_cxl_state *cxl = vdev->cxl;
> +	u32 flags;
> +	int ret;
> +
> +	if (!cxl)
> +		return -ENODEV;
> +
> +	if (!cxl->region || cxl->region_vaddr)
> +		return -ENODEV;
> +
> +	cxl->region_vaddr = ioremap_cache(cxl->region_hpa, cxl->region_size);

Should this be using memremap_pages() family of call rather than ioremap() like how DAX does it? CXL mem regions are not MMIO regions.

DJ