You'd need to create a 160KB VM in order to stay below the required direct map memory regions imposed by the system firmware (e8000 - c0000). Non-upstream bypasses of those restrictions are clearly not supported. You can find more details regarding the RMRR restriction here: https://access.redhat.com/sites/default/files/attachments/rmrr-wp1.pdf
QEMU currently has no support for creating a VM memory map based on the restrictions of the host platform IOMMU requirements.
You'd need to create a 160KB VM in order to stay below the required direct map memory regions imposed by the system firmware (e8000 - c0000). Non-upstream bypasses of those restrictions are clearly not supported. You can find more details regarding the RMRR restriction here: /access. redhat. com/sites/ default/ files/attachmen ts/rmrr- wp1.pdf
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QEMU currently has no support for creating a VM memory map based on the restrictions of the host platform IOMMU requirements.