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This introduces stub implementations of the H_RESIZE_HPT_PREPARE and H_RESIZE_HPT_COMMIT hypercalls which we hope to add in a PAPR extension to allow run time resizing of a guest's hash page table. It also adds a new machine property for controlling whether this new facility is available. For now we only allow resizing with TCG, allowing it with KVM will require kernel changes as well. Finally, it adds a new string to the hypertas property in the device tree, advertising to the guest the availability of the HPT resizing hypercalls. This is a tentative suggested value, and would need to be standardized by PAPR before being merged. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Reviewed-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com> Reviewed-by: Laurent Vivier <lvivier@redhat.com> |
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