On 6/17/19 11:50 AM, Nadav Amit wrote: >> The idea is that you have a per-cpu address space. Certain kernel >> virtual addresses would map to different physical address based on where >> you are running. Each of the physical addresses would be "owned" by a >> single CPU and would, by convention, never use a PGD that mapped an >> address unless that CPU that "owned" it. >> >> In that case, you never really invalidate those addresses. > I understand, but as I see it, this is not related directly to PCIDs. Yeah, the only link I was thinking of is that we can manage per-CPU PGDs in the same way that we manage PCIDs. Basically we can reuse a chunk of the software concept.
