Re: [PATCH v2 1/5] [RFC]iommu: Add a IOMMU_DEVONLY protection flag

On Fri, Oct 01, 2021 at 04:34:23PM +0200, Boris Brezillon wrote:

+/*

• • Mapping is only accessed by the device behind the iommu. That means other
• • devices or CPUs are not expected to access this physical memory region,
• • and the MMU driver can safely restrict the shareability domain to the
• • device itself.
• */

+#define IOMMU_DEVONLY (1 << 6)

I am not entirely happy with the name, how about

IOMMU_DEV_PRIVATE?

PRIV would conflict with IOMMU_PRIV (which should probably also be IOMMU_PRIVILEGED, but thats another problem).

Regards,

Joerg