KVM: SVM: Add GHCB definitions
Extend the vmcb_safe_area with SEV-ES fields and add a new 'struct ghcb' which will be used for guest-hypervisor communication. Signed-off-by: NTom Lendacky <thomas.lendacky@amd.com> Signed-off-by: NJoerg Roedel <jroedel@suse.de> Signed-off-by: NBorislav Petkov <bp@suse.de> Link: https://lkml.kernel.org/r/20200907131613.12703-3-joro@8bytes.org
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