Re: Linux guest kernel threat model for Confidential Computing

Michael S. Tsirkin
2023-01-30T15:14:54Z

On Mon, Jan 30, 2023 at 03:00:52PM +0300, Kirill A. Shutemov wrote:
> On Mon, Jan 30, 2023 at 12:36:34PM +0100, Christophe de Dinechin wrote:
> > Is there for example anything that precludes TDX or SEV from executing
> > code in the bounce buffers?
>
> In TDX, attempt to fetch instructions from shared memory (i.e. bounce
> buffer) will cause #GP, only data fetch is allowed. Page table also cannot
> be placed there and will cause the same #GP.

Same with SEV IIRC.

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