Re: add a not device managed memremap_pages v2

From: Bharata B Rao
Date: Fri Aug 16 2019 - 06:48:20 EST

On Fri, Aug 16, 2019 at 08:54:30AM +0200, Christoph Hellwig wrote:
> Hi Dan and Jason,
> Bharata has been working on secure page management for kvmppc guests,
> and one I thing I noticed is that he had to fake up a struct device
> just so that it could be passed to the devm_memremap_pages
> instrastructure for device private memory.
> This series adds non-device managed versions of the
> devm_request_free_mem_region and devm_memremap_pages functions for
> his use case.

Tested this series with my patches that add secure page management
for kvmppc guests. These patches along with migrate_vma-cleanup
series are good-to-have to support secure guests on ultravisor enabled
POWER platforms.