On Wed, Nov 15, 2023 at 11:51:53AM -0600, Michael Roth wrote:
> The struct used for GHCB-based page-state change requests uses a 40-bit
> bit-field for the GFN, which is shifted by PAGE_SHIFT to generate a
> 64-bit address. However, anything beyond 40-bits simply gets shifted off
> when doing this, which will cause issues when dealing with 1TB+
> addresses. Fix this by casting the 40-bit GFN values to 64-bit ones
> prior to shifting it by PAGE_SHIFT.
>
> Fixes: ade62c18f474 ("OvmfPkg/MemEncryptSevLib: add support to validate
> system RAM")
> Signed-off-by: Michael Roth <michael.r...@amd.com>
Reviewed-by: Gerd Hoffmann <kra...@redhat.com>
take care,
Gerd
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