On Thu, Feb 22, 2024 at 11:29:50AM -0600, Tom Lendacky wrote: > BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=4654 > > The SVSM specification relies on a specific register calling convention to > hold the parameters that are associated with the SVSM request. The SVSM is > invoked by requesting the hypervisor to run the VMPL0 VMSA of the guest > using the GHCB MSR Protocol or a GHCB NAE event. > > Create a new version of the VMGEXIT instruction that will adhere to this > calling convention and load the SVSM function arguments into the proper > register before invoking the VMGEXIT instruction. On return, perform the > atomic exchange on the SVSM call pending value as specified in the SVSM > specification. > > Signed-off-by: Tom Lendacky <thomas.lenda...@amd.com>
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