| From | Andy Lutomirski <> | Date | Mon, 13 May 2019 11:18:41 -0700 | Subject | Re: [RFC KVM 18/27] kvm/isolation: function to copy page table entries for percpu buffer |
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On Mon, May 13, 2019 at 7:39 AM Alexandre Chartre <alexandre.chartre@oracle.com> wrote: > > pcpu_base_addr is already mapped to the KVM address space, but this > represents the first percpu chunk. To access a per-cpu buffer not > allocated in the first chunk, add a function which maps all cpu > buffers corresponding to that per-cpu buffer. > > Also add function to clear page table entries for a percpu buffer. >
This needs some kind of clarification so that readers can tell whether you're trying to map all percpu memory or just map a specific variable. In either case, you're making a dubious assumption that percpu memory contains no secrets.
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