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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Sun, Jun 02, 2024 at 08:25:34PM -0700, Nicolin Chen wrote: > > I understand the appeal of doing this has been to minimize qemu > > changes in its ACPI parts if we tackle that instead maybe we should > > just not implement viommu to multiple piommu. It is somewhat > > complicated. > > Would you please clarify that suggestion "not implement viommu > to multiple piommu"? > > For regular nesting (SMMU), we are still doing one vSMMU in the > VMM, though VCMDQ case would be an exception.... This is what I mean, always do multiple vSMMU if there are multiple physical pSMMUs. Don't replicate any virtual commands across pSMMUs. Jason _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel