Messages in this thread | | | Date | Tue, 28 Sep 2021 17:22:34 +0200 | From | Joerg Roedel <> | Subject | Re: [PATCH v6 06/11] x86/traps: Add #VE support for TDX guest |
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On Tue, Sep 28, 2021 at 07:05:40AM -0700, Dave Hansen wrote: > "Shared" pages can cause #VE's. The guest must be careful not to touch > them in the syscall entry path, for example. But, shared pages are > untrusted so they're not use for stacks. > > "Private" pages can cause #VE's. But, only *some* of them. Before a > page is accepted, it is in the SEPT_PENDING and a reference would cause > a #VE. But, after acceptance, page references either succeed or a TD > Exit and the hypervisor gets to handle the situation.
Okay, and there is no way for the VMM to replace an already accepted page with a page in SEPT_PENDING state?
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