| Date | Wed, 1 Mar 2023 08:56:05 -0800 | Subject | Re: [PATCH RFC v8 00/56] Add AMD Secure Nested Paging (SEV-SNP) Hypervisor Support | From | Dave Hansen <> |
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On 2/20/23 10:37, Michael Roth wrote: > The RMP check is enforced as soon as SEV-SNP is enabled. Not every memory > access requires an RMP check. In particular, the read accesses from the > hypervisor do not require RMP checks because the data confidentiality is > already protected via memory encryption. When hardware encounters an RMP > checks failure, it raises a page-fault exception. If RMP check failure > is due to the page-size mismatch, then split the large page to resolve > the fault.
What does this all _mean_?
When does the kernel need to care about a "page-size mismatch"?
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