Re: [PATCH v7 31/45] arm64: rme: Prevent Device mappings for Realms

[Gavin Shan]

On 2/14/25 2:14 AM, Steven Price wrote:
> Physical device assignment is not yet supported by the RMM, so it
> doesn't make much sense to allow device mappings within the realm.
> Prevent them when the guest is a realm.
>
> Signed-off-by: Steven Price <steven.price@xxxxxxx>
> ---
> Changes from v6:
>   * Fix the check in user_mem_abort() to prevent all pages that are not
>     guest_memfd() from being mapped into the protected half of the IPA.
> Changes from v5:
>   * Also prevent accesses in user_mem_abort()
> ---
>   arch/arm64/kvm/mmu.c | 13 +++++++++++++
>   1 file changed, 13 insertions(+)

Reviewed-by: Gavin Shan <gshan@xxxxxxxxxx>