coco: arm64: s390: powerpc: Mark secure guests with CC_ATTR_GUEST_MEM_ENCRYPT

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arm64 Realms, powerpc secure guests and s390 protected virtualization
guests currently report CC_ATTR_MEM_ENCRYPT, but not
CC_ATTR_GUEST_MEM_ENCRYPT.

These environments are all secure guest configurations. Their
force_dma_unencrypted() implementations also treat the same secure guest
state as requiring unencrypted DMA. Report CC_ATTR_GUEST_MEM_ENCRYPT for
the same condition so generic confidential-computing code can distinguish
guest memory encryption from host memory encryption instead of relying only
on CC_ATTR_MEM_ENCRYPT.

Signed-off-by: Aneesh Kumar K.V (Arm) <aneesh.kumar@kernel.org>
Link: https://lore.kernel.org/r/20260717180442.110954-9-aneesh.kumar@kernel.org
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>

...

This commit is contained in:

Aneesh Kumar K.V (Arm) 2026-07-17 23:34:26 +05:30 • committed by Marek Szyprowski

parent a7139dbbb1

commit d4b9d59318

3 changed files with 3 additions and 0 deletions

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arch/arm64/mm/init.c

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arch/powerpc/platforms/pseries/cc_platform.c

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arch/s390/mm/init.c

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