# Re: \[PATCH v6 01/20\] s390: Expose protected virtualization through cc\_platform\_has()

- From: Catalin Marinas \<catalin.marinas@arm.com\>
- Date: 2026-06-09 13:44:46 
- List: linuxppc-dev
- Page: https://ratatoskr.run/linuxppc-dev/2026/06/17109497
- Thread: https://ratatoskr.run/linux-iommu/2026/06/17087574/t.md

```text
On Thu, Jun 04, 2026 at 02:09:40PM +0530, Aneesh Kumar K.V (Arm) wrote:
> Protected virtualization guests use memory encryption, so advertise that to
> the rest of the kernel through cc_platform_has(CC_ATTR_MEM_ENCRYPT).
> 
> s390 already forces DMA mappings to be unencrypted for protected
> virtualization guests through force_dma_unencrypted(). Add
> ARCH_HAS_CC_PLATFORM and provide the matching cc_platform_has()
> implementation
> 
> Signed-off-by: Aneesh Kumar K.V (Arm) <aneesh.kumar@kernel.org>
> ---

Nit: just drop the --- line if you did intend to cc those people.
Nothing wrong for them to end up in the commit log (proof that they've
been cc'ed if they did not reply ;)).

-- 
Catalin

```