iommu/amd: Do not use flush-queue when NpCache is on

Do not use flush-queue on virtualized environments, where the NpCache
capability of the IOMMU is set. This is required to reduce
virtualization overheads.

This change follows a similar change to Intel's VT-d and a detailed
explanation as for the rationale is described in commit 29b32839725f
("iommu/vt-d: Do not use flush-queue when caching-mode is on").

Cc: Joerg Roedel <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: Jiajun Cao <[email protected]>
Cc: Robin Murphy <[email protected]>
Cc: Lu Baolu <[email protected]>
Cc: [email protected]
Cc: [email protected]
Signed-off-by: Nadav Amit <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Joerg Roedel <[email protected]>

0 files changed, 0 insertions, 0 deletions