Re: [PATCH v1 11/26] x86/sev: Invalidate pages from the direct map when adding them to the RMP table

Dave Hansen
2024-01-12T20:00:06Z

On 12/30/23 08:19, Michael Roth wrote:
> If the kernel uses a 2MB directmap mapping to write to an address, and
> that 2MB range happens to contain a 4KB page that set to private in the
> RMP table, that will also lead to a page-fault exception.

I thought we agreed long ago to just demote the whole direct map to 4k
on kernels that might need to act as SEV-SNP hosts. That should be step
one and this can be discussed as an optimization later.