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H A D | init.c | 6664340c Fri Jul 23 04:32:04 CDT 2021 Nadav Amit <namit@vmware.com> 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 <joro@8bytes.org> Cc: Will Deacon <will@kernel.org> Cc: Jiajun Cao <caojiajun@vmware.com> Cc: Robin Murphy <robin.murphy@arm.com> Cc: Lu Baolu <baolu.lu@linux.intel.com> Cc: iommu@lists.linux-foundation.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Nadav Amit <namit@vmware.com> Link: https://lore.kernel.org/r/20210723093209.714328-3-namit@vmware.com Signed-off-by: Joerg Roedel <jroedel@suse.de>
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