On 11/10/20 11:47 PM, Ben Widawsky wrote:
> A CXL memory device (AKA Type 3) is a CXL component that contains some
> combination of volatile and persistent memory. It also implements the
> previously defined mailbox interface as well as the memory device
> firmware interface.
>
> The following example will create a 256M device in a 512M window:
>
> -object "memory-backend-file,id=cxl-mem1,share,mem-path=cxl-type3,size=512M"
> -device "cxl-type3,bus=rp0,memdev=cxl-mem1,id=cxl-pmem0,size=256M"
>
> Signed-off-by: Ben Widawsky <[email protected]>
> ---
> +++ b/qapi/machine.json
> @@ -1394,6 +1394,7 @@
> { 'union': 'MemoryDeviceInfo',
> 'data': { 'dimm': 'PCDIMMDeviceInfo',
> 'nvdimm': 'PCDIMMDeviceInfo',
> + 'cxl': 'PCDIMMDeviceInfo',
> 'virtio-pmem': 'VirtioPMEMDeviceInfo',
> 'virtio-mem': 'VirtioMEMDeviceInfo'
> }
Missing documentation of the new data type, and the fact that it will be
introduced in 6.0. Also, Markus has been trying to get rid of so-called
"simple unions" in favor of "flat unions" - every time we modify an
existing simple union, it is worth asking if it is time to first flatten
this.
--
Eric Blake, Principal Software Engineer
Red Hat, Inc. +1-919-301-3226
Virtualization: qemu.org | libvirt.org
